Rework kube-proxy into LB plugin

Add support of NAT66

Change-Id: Ie6aa79078a3835f989829b9a597c448dfd2f9ea3
Signed-off-by: Hongjun Ni <hongjun.ni@intel.com>

20 files changed, 1772 insertions, 4059 deletions

diff --git a/src/configure.ac b/src/configure.ac
index bae3fdebcfb..2d12090aaf1 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -229,7 +229,6 @@ PLUGIN_ENABLED(igmp)
 PLUGIN_ENABLED(ila)
 PLUGIN_ENABLED(ioam)
 PLUGIN_ENABLED(ixge)
-PLUGIN_ENABLED(kubeproxy)
 PLUGIN_ENABLED(l2e)
 PLUGIN_ENABLED(lacp)
 PLUGIN_ENABLED(lb)
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
index 825021d69c3..971b263a630 100644
--- a/src/plugins/Makefile.am
+++ b/src/plugins/Makefile.am
@@ -75,10 +75,6 @@ if ENABLE_IXGE_PLUGIN
 include ixge.am
 endif
 
-if ENABLE_KUBEPROXY_PLUGIN
-include kubeproxy.am
-endif
-
 if ENABLE_LACP_PLUGIN
 include lacp.am
 endif
diff --git a/src/plugins/kubeproxy.am b/src/plugins/kubeproxy.am
deleted file mode 100644
index 50e7e2fc1a4..00000000000
--- a/src/plugins/kubeproxy.am
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright (c) 2017 Intel Corporation, Inc.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at:
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-vppapitestplugins_LTLIBRARIES += kubeproxy_test_plugin.la
-vppplugins_LTLIBRARIES += kubeproxy_plugin.la
-
-kubeproxy_plugin_la_SOURCES =	    \
-	kubeproxy/kp.c			\
-	kubeproxy/kp_node.c	    \
-	kubeproxy/kp_cli.c		\
-	kubeproxy/kp_api.c
-
-BUILT_SOURCES +=		    \
-	kubeproxy/kp.api.h	    \
-	kubeproxy/kp.api.json
-
-API_FILES += kubeproxy/kp.api
-
-noinst_HEADERS +=		    \
-	kubeproxy/kp.h			\
-	kubeproxy/kphash.h		\
-	kubeproxy/kp.api.h
-
-kubeproxy_test_plugin_la_SOURCES =	  \
-	kubeproxy/kp_test.c	      \
-	kubeproxy/kp_plugin.api.h
-
-# vi:syntax=automake
diff --git a/src/plugins/kubeproxy/kp.api b/src/plugins/kubeproxy/kp.api
deleted file mode 100644
index 1eedd9ef795..00000000000
--- a/src/plugins/kubeproxy/kp.api
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright (c) 2017 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-option version = "1.0.0";
-
-/** \brief Configure Kube-proxy global parameters
-    @param client_index - opaque cookie to identify the sender
-    @param context - sender context, to match reply w/ request
-    @param sticky_buckets_per_core - Number of buckets *per worker thread* in the
-           established flow table (must be power of 2).
-    @param flow_timeout - Time in seconds after which, if no packet is received
-           for a given flow, the flow is removed from the established flow table.
-*/
-autoreply define kp_conf
-{
-  u32 client_index;
-  u32 context;
-  u32 sticky_buckets_per_core;
-  u32 flow_timeout;
-};
-
-/** \brief Add a virtual address (or prefix)
-    @param client_index - opaque cookie to identify the sender
-    @param context - sender context, to match reply w/ request
-    @param ip_prefix - IP address (IPv4 in lower order 32 bits).
-    @param prefix_length - IP prefix length (96 + 'IPv4 prefix length' for IPv4).
-    @param is_ipv6 - Is IPv6 addresss.
-    @param port - service port;
-    @param target_port - Pod's port corresponding to specific service.
-    @param node_port - Node's port.
-    @param is_nat4 - DNAT is NAT44 (NAT64 otherwise).
-    @param new_flows_table_length - Size of the new connections flow table used
-           for this VIP (must be power of 2).
-    @param is_del - The VIP should be removed.
-*/
-autoreply define kp_add_del_vip {
-  u32 client_index;
-  u32 context;
-  u8 ip_prefix[16];
-  u8 prefix_length;
-  u8 is_ipv6;
-  u16 port;
-  u16 target_port;
-  u16 node_port;
-  u8 is_nat4;
-  u32 new_flows_table_length;
-  u8 is_del;
-};
-
-/** \brief Add a pod for a given VIP
-    @param client_index - opaque cookie to identify the sender
-    @param context - sender context, to match reply w/ request
-    @param vip_ip_prefix - VIP IP address (IPv4 in lower order 32 bits).
-    @param vip_ip_prefix - VIP IP prefix length (96 + 'IPv4 prefix length' for IPv4).
-    @param vip_is_ipv6 - VIP is IPv6 addresss.
-    @param pod_address - The pod's IP address (IPv4 in lower order 32 bits).
-    @param pod_is_ipv6 - Pod is IPv6 addresss.
-    @param is_del - The Pod should be removed.
-*/
-autoreply define kp_add_del_pod {
-  u32 client_index;
-  u32 context;
-  u8 vip_ip_prefix[16];
-  u8 vip_prefix_length;
-  u8 vip_is_ipv6;
-  u8 pod_address[16];
-  u8 pod_is_ipv6;
-  u8 is_del;
-};
diff --git a/src/plugins/kubeproxy/kp.c b/src/plugins/kubeproxy/kp.c
deleted file mode 100644
index b31b3171d90..00000000000
--- a/src/plugins/kubeproxy/kp.c
+++ /dev/null
@@ -1,978 +0,0 @@
-/*
- * Copyright (c) 2017 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or anated to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <kubeproxy/kp.h>
-#include <vnet/plugin/plugin.h>
-#include <vpp/app/version.h>
-#include <vnet/api_errno.h>
-#include <vnet/udp/udp.h>
-
-//GC runs at most once every so many seconds
-#define KP_GARBAGE_RUN 60
-
-//After so many seconds. It is assumed that inter-core race condition will not occur.
-#define KP_CONCURRENCY_TIMEOUT 10
-
-kp_main_t kp_main;
-
-#define kp_get_writer_lock() do {} while(__sync_lock_test_and_set (kp_main.writer_lock, 1))
-#define kp_put_writer_lock() kp_main.writer_lock[0] = 0
-
-static void kp_pod_stack (kp_pod_t *pod);
-
-void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen)
-{
-  if (plen == 0) {
-    prefix->as_u64[0] = 0;
-    prefix->as_u64[1] = 0;
-  } else if (plen <= 64) {
-    prefix->as_u64[0] &= clib_host_to_net_u64(0xffffffffffffffffL << (64 - plen));
-    prefix->as_u64[1] = 0;
-  } else {
-    prefix->as_u64[1] &= clib_host_to_net_u64(0xffffffffffffffffL << (128 - plen));
-  }
-
-}
-
-uword unformat_ip46_prefix (unformat_input_t * input, va_list * args)
-{
-  ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
-  u8 *len = va_arg (*args, u8 *);
-  ip46_type_t type = va_arg (*args, ip46_type_t);
-
-  u32 l;
-  if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) {
-    if (l > 32)
-      return 0;
-    *len = l + 96;
-    ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0;
-  } else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) {
-    if (l > 128)
-      return 0;
-    *len = l;
-  } else {
-    return 0;
-  }
-  return 1;
-}
-
-u8 *format_ip46_prefix (u8 * s, va_list * args)
-{
-  ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
-  u32 len = va_arg (*args, u32); //va_arg cannot use u8 or u16
-  ip46_type_t type = va_arg (*args, ip46_type_t);
-
-  int is_ip4 = 0;
-  if (type == IP46_TYPE_IP4)
-    is_ip4 = 1;
-  else if (type == IP46_TYPE_IP6)
-    is_ip4 = 0;
-  else
-    is_ip4 = (len >= 96) && ip46_address_is_ip4(ip46);
-
-  return is_ip4 ?
-      format(s, "%U/%d", format_ip4_address, &ip46->ip4, len - 96):
-      format(s, "%U/%d", format_ip6_address, &ip46->ip6, len);
-}
-
-const static char * const kp_dpo_nat4_ip4[] = { "kp4-nat4" , NULL };
-const static char * const kp_dpo_nat4_ip6[] = { "kp6-nat4" , NULL };
-const static char* const * const kp_dpo_nat4_nodes[DPO_PROTO_NUM] =
-    {
-	[DPO_PROTO_IP4]  = kp_dpo_nat4_ip4,
-	[DPO_PROTO_IP6]  = kp_dpo_nat4_ip6,
-    };
-
-const static char * const kp_dpo_nat6_ip4[] = { "kp4-nat6" , NULL };
-const static char * const kp_dpo_nat6_ip6[] = { "kp6-nat6" , NULL };
-const static char* const * const kp_dpo_nat6_nodes[DPO_PROTO_NUM] =
-    {
-	[DPO_PROTO_IP4]  = kp_dpo_nat6_ip4,
-	[DPO_PROTO_IP6]  = kp_dpo_nat6_ip6,
-    };
-
-u32 kp_hash_time_now(vlib_main_t * vm)
-{
-  return (u32) (vlib_time_now(vm) + 10000);
-}
-
-u8 *format_kp_main (u8 * s, va_list * args)
-{
-  vlib_thread_main_t *tm = vlib_get_thread_main();
-  kp_main_t *kpm = &kp_main;
-  s = format(s, "kp_main");
-  s = format(s, " #vips: %u\n", pool_elts(kpm->vips));
-  s = format(s, " #pods: %u\n", pool_elts(kpm->pods) - 1);
-
-  u32 thread_index;
-  for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) {
-    kp_hash_t *h = kpm->per_cpu[thread_index].sticky_ht;
-    if (h) {
-      s = format(s, "core %d\n", thread_index);
-      s = format(s, "  timeout: %ds\n", h->timeout);
-      s = format(s, "  usage: %d / %d\n", kp_hash_elts(h, kp_hash_time_now(vlib_get_main())),  kp_hash_size(h));
-    }
-  }
-
-  return s;
-}
-
-static char *kp_vip_type_strings[] = {
-    [KP_VIP_TYPE_IP4_NAT44] = "ip4-nat44",
-    [KP_VIP_TYPE_IP4_NAT46] = "ip4-nat46",
-    [KP_VIP_TYPE_IP6_NAT64] = "ip6-nat64",
-    [KP_VIP_TYPE_IP6_NAT66] = "ip6-nat66",
-};
-
-u8 *format_kp_vip_type (u8 * s, va_list * args)
-{
-  kp_vip_type_t vipt = va_arg (*args, kp_vip_type_t);
-  u32 i;
-  for (i=0; i<KP_VIP_N_TYPES; i++)
-    if (vipt == i)
-      return format(s, kp_vip_type_strings[i]);
-  return format(s, "_WRONG_TYPE_");
-}
-
-uword unformat_kp_vip_type (unformat_input_t * input, va_list * args)
-{
-  kp_vip_type_t *vipt = va_arg (*args, kp_vip_type_t *);
-  u32 i;
-  for (i=0; i<KP_VIP_N_TYPES; i++)
-    if (unformat(input, kp_vip_type_strings[i])) {
-      *vipt = i;
-      return 1;
-    }
-  return 0;
-}
-
-u8 *format_kp_vip (u8 * s, va_list * args)
-{
-  kp_vip_t *vip = va_arg (*args, kp_vip_t *);
-  return format(s, "%U %U port:%u target_port:%u node_port:%u "
-                   "new_size:%u #pod:%u%s",
-             format_kp_vip_type, vip->type,
-             format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
-	     ntohs(vip->port), ntohs(vip->target_port),
-	     ntohs(vip->node_port),
-             vip->new_flow_table_mask + 1,
-             pool_elts(vip->pod_indexes),
-             (vip->flags & KP_VIP_FLAGS_USED)?"":" removed");
-}
-
-u8 *format_kp_pod (u8 * s, va_list * args)
-{
-  kp_pod_t *pod = va_arg (*args, kp_pod_t *);
-  return format(s, "%U %s", format_ip46_address,
-		&pod->address, IP46_TYPE_ANY,
-		(pod->flags & KP_POD_FLAGS_USED)?"used":"removed");
-}
-
-u8 *format_kp_vip_detailed (u8 * s, va_list * args)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip = va_arg (*args, kp_vip_t *);
-  uword indent = format_get_indent (s);
-
-  s = format(s, "%U %U [%u] %U port:%u target_port:%u node_port:%u%s\n"
-                   "%U  new_size:%u\n",
-                  format_white_space, indent,
-                  format_kp_vip_type, vip->type,
-                  vip - kpm->vips, format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
-		  ntohs(vip->port), ntohs(vip->target_port),
-		  ntohs(vip->node_port),
-                  (vip->flags & KP_VIP_FLAGS_USED)?"":" removed",
-                  format_white_space, indent,
-                  vip->new_flow_table_mask + 1);
-
-  //Print counters
-  s = format(s, "%U  counters:\n",
-             format_white_space, indent);
-  u32 i;
-  for (i=0; i<KP_N_VIP_COUNTERS; i++)
-    s = format(s, "%U    %s: %d\n",
-               format_white_space, indent,
-               kpm->vip_counters[i].name,
-               vlib_get_simple_counter(&kpm->vip_counters[i], vip - kpm->vips));
-
-
-  s = format(s, "%U  #pod:%u\n",
-             format_white_space, indent,
-             pool_elts(vip->pod_indexes));
-
-  //Let's count the buckets for each POD
-  u32 *count = 0;
-  vec_validate(count, pool_len(kpm->pods)); //Possibly big alloc for not much...
-  kp_new_flow_entry_t *nfe;
-  vec_foreach(nfe, vip->new_flow_table)
-    count[nfe->pod_index]++;
-
-  kp_pod_t *pod;
-  u32 *pod_index;
-  pool_foreach(pod_index, vip->pod_indexes, {
-      pod = &kpm->pods[*pod_index];
-      s = format(s, "%U    %U %d buckets   %d flows  dpo:%u %s\n",
-                   format_white_space, indent,
-                   format_ip46_address, &pod->address, IP46_TYPE_ANY,
-                   count[pod - kpm->pods],
-                   vlib_refcount_get(&kpm->pod_refcount, pod - kpm->pods),
-                   pod->dpo.dpoi_index,
-                   (pod->flags & KP_POD_FLAGS_USED)?"used":" removed");
-  });
-
-  vec_free(count);
-
-  /*
-  s = format(s, "%U  new flows table:\n", format_white_space, indent);
-  kp_new_flow_entry_t *nfe;
-  vec_foreach(nfe, vip->new_flow_table) {
-    s = format(s, "%U    %d: %d\n", format_white_space, indent, nfe - vip->new_flow_table, nfe->pod_index);
-  }
-  */
-  return s;
-}
-
-typedef struct {
-  u32 pod_index;
-  u32 last;
-  u32 skip;
-} kp_pseudorand_t;
-
-static int kp_pseudorand_compare(void *a, void *b)
-{
-  kp_pod_t *poda, *podb;
-  kp_main_t *kpm = &kp_main;
-  poda = &kpm->pods[((kp_pseudorand_t *)a)->pod_index];
-  podb = &kpm->pods[((kp_pseudorand_t *)b)->pod_index];
-  return memcmp(&poda->address, &podb->address, sizeof(podb->address));
-}
-
-static void kp_vip_garbage_collection(kp_vip_t *vip)
-{
-  kp_main_t *kpm = &kp_main;
-  ASSERT (kpm->writer_lock[0]);
-
-  u32 now = (u32) vlib_time_now(vlib_get_main());
-  if (!clib_u32_loop_gt(now, vip->last_garbage_collection + KP_GARBAGE_RUN))
-    return;
-
-  vip->last_garbage_collection = now;
-  kp_pod_t *pod;
-  u32 *pod_index;
-  pool_foreach(pod_index, vip->pod_indexes, {
-      pod = &kpm->pods[*pod_index];
-      if (!(pod->flags & KP_POD_FLAGS_USED) && //Not used
-	  clib_u32_loop_gt(now, pod->last_used + KP_CONCURRENCY_TIMEOUT) && //Not recently used
-	  (vlib_refcount_get(&kpm->pod_refcount, pod - kpm->pods) == 0))
-	{ //Not referenced
-	  fib_entry_child_remove(pod->next_hop_fib_entry_index,
-				 pod->next_hop_child_index);
-	  fib_table_entry_delete_index(pod->next_hop_fib_entry_index,
-				       FIB_SOURCE_RR);
-	  pod->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
-
-	  pool_put(vip->pod_indexes, pod_index);
-	  pool_put(kpm->pods, pod);
-	}
-  });
-}
-
-void kp_garbage_collection()
-{
-  kp_main_t *kpm = &kp_main;
-  kp_get_writer_lock();
-  kp_vip_t *vip;
-  u32 *to_be_removed_vips = 0, *i;
-  pool_foreach(vip, kpm->vips, {
-      kp_vip_garbage_collection(vip);
-
-      if (!(vip->flags & KP_VIP_FLAGS_USED) &&
-          (pool_elts(vip->pod_indexes) == 0)) {
-        vec_add1(to_be_removed_vips, vip - kpm->vips);
-      }
-  });
-
-  vec_foreach(i, to_be_removed_vips) {
-    vip = &kpm->vips[*i];
-    pool_put(kpm->vips, vip);
-    pool_free(vip->pod_indexes);
-  }
-
-  vec_free(to_be_removed_vips);
-  kp_put_writer_lock();
-}
-
-static void kp_vip_update_new_flow_table(kp_vip_t *vip)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_new_flow_entry_t *old_table;
-  u32 i, *pod_index;
-  kp_new_flow_entry_t *new_flow_table = 0;
-  kp_pod_t *pod;
-  kp_pseudorand_t *pr, *sort_arr = 0;
-  u32 count;
-
-  ASSERT (kpm->writer_lock[0]); //We must have the lock
-
-  //Check if some POD is configured or not
-  i = 0;
-  pool_foreach(pod_index, vip->pod_indexes, {
-      pod = &kpm->pods[*pod_index];
-      if (pod->flags & KP_POD_FLAGS_USED) { //Not used anymore
-        i = 1;
-        goto out; //Not sure 'break' works in this macro-loop
-      }
-  });
-
-out:
-  if (i == 0) {
-    //Only the default. i.e. no POD
-    vec_validate(new_flow_table, vip->new_flow_table_mask);
-    for (i=0; i<vec_len(new_flow_table); i++)
-      new_flow_table[i].pod_index = 0;
-
-    goto finished;
-  }
-
-  //First, let's sort the PODs
-  sort_arr = 0;
-  vec_alloc(sort_arr, pool_elts(vip->pod_indexes));
-
-  i = 0;
-  pool_foreach(pod_index, vip->pod_indexes, {
-      pod = &kpm->pods[*pod_index];
-      if (!(pod->flags & KP_POD_FLAGS_USED)) //Not used anymore
-        continue;
-
-      sort_arr[i].pod_index = pod - kpm->pods;
-      i++;
-  });
-  _vec_len(sort_arr) = i;
-
-  vec_sort_with_function(sort_arr, kp_pseudorand_compare);
-
-  //Now let's pseudo-randomly generate permutations
-  vec_foreach(pr, sort_arr) {
-    kp_pod_t *pod = &kpm->pods[pr->pod_index];
-
-    u64 seed = clib_xxhash(pod->address.as_u64[0] ^
-                           pod->address.as_u64[1]);
-    /* We have 2^n buckets.
-     * skip must be prime with 2^n.
-     * So skip must be odd.
-     * MagLev actually state that M should be prime,
-     * but this has a big computation cost (% operation).
-     * Using 2^n is more better (& operation).
-     */
-    pr->skip = ((seed & 0xffffffff) | 1) & vip->new_flow_table_mask;
-    pr->last = (seed >> 32) & vip->new_flow_table_mask;
-  }
-
-  //Let's create a new flow table
-  vec_validate(new_flow_table, vip->new_flow_table_mask);
-  for (i=0; i<vec_len(new_flow_table); i++)
-    new_flow_table[i].pod_index = ~0;
-
-  u32 done = 0;
-  while (1) {
-    vec_foreach(pr, sort_arr) {
-      while (1) {
-        u32 last = pr->last;
-        pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask;
-        if (new_flow_table[last].pod_index == ~0) {
-          new_flow_table[last].pod_index = pr->pod_index;
-          break;
-        }
-      }
-      done++;
-      if (done == vec_len(new_flow_table))
-        goto finished;
-    }
-  }
-
-  vec_free(sort_arr);
-
-finished:
-
-//Count number of changed entries
-  count = 0;
-  for (i=0; i<vec_len(new_flow_table); i++)
-    if (vip->new_flow_table == 0 ||
-        new_flow_table[i].pod_index != vip->new_flow_table[i].pod_index)
-      count++;
-
-  old_table = vip->new_flow_table;
-  vip->new_flow_table = new_flow_table;
-  vec_free(old_table);
-}
-
-int kp_conf(u32 per_cpu_sticky_buckets, u32 flow_timeout)
-{
-  kp_main_t *kpm = &kp_main;
-
-  if (!is_pow2(per_cpu_sticky_buckets))
-    return VNET_API_ERROR_INVALID_MEMORY_SIZE;
-
-  kp_get_writer_lock(); //Not exactly necessary but just a reminder that it exists for my future self
-  kpm->per_cpu_sticky_buckets = per_cpu_sticky_buckets;
-  kpm->flow_timeout = flow_timeout;
-  kp_put_writer_lock();
-  return 0;
-}
-
-static
-int kp_vip_find_index_with_lock(ip46_address_t *prefix, u8 plen, u32 *vip_index)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip;
-  ASSERT (kpm->writer_lock[0]); //This must be called with the lock owned
-  ip46_prefix_normalize(prefix, plen);
-  pool_foreach(vip, kpm->vips, {
-      if ((vip->flags & KP_POD_FLAGS_USED) &&
-          vip->plen == plen &&
-          vip->prefix.as_u64[0] == prefix->as_u64[0] &&
-          vip->prefix.as_u64[1] == prefix->as_u64[1]) {
-        *vip_index = vip - kpm->vips;
-        return 0;
-      }
-  });
-  return VNET_API_ERROR_NO_SUCH_ENTRY;
-}
-
-int kp_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index)
-{
-  int ret;
-  kp_get_writer_lock();
-  ret = kp_vip_find_index_with_lock(prefix, plen, vip_index);
-  kp_put_writer_lock();
-  return ret;
-}
-
-static int kp_pod_find_index_vip(kp_vip_t *vip, ip46_address_t *address, u32 *pod_index)
-{
-  kp_main_t *kpm = &kp_main;
-  ASSERT (kpm->writer_lock[0]); //This must be called with the lock owned
-  kp_pod_t *pod;
-  u32 *podi;
-  pool_foreach(podi, vip->pod_indexes, {
-      pod = &kpm->pods[*podi];
-      if (pod->vip_index == (vip - kpm->vips) &&
-          pod->address.as_u64[0] == address->as_u64[0] &&
-          pod->address.as_u64[1] == address->as_u64[1]) {
-        *pod_index = pod - kpm->pods;
-        return 0;
-      }
-  });
-  return -1;
-}
-
-int kp_vip_add_pods(u32 vip_index, ip46_address_t *addresses, u32 n)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_get_writer_lock();
-  kp_vip_t *vip;
-  if (!(vip = kp_vip_get_by_index(vip_index))) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_NO_SUCH_ENTRY;
-  }
-
-  ip46_type_t type = kp_vip_is_nat4(vip)?IP46_TYPE_IP4:IP46_TYPE_IP6;
-  u32 *to_be_added = 0;
-  u32 *to_be_updated = 0;
-  u32 i;
-  u32 *ip;
-  kp_snat_mapping_t *m;
-  kp_snat4_key_t m_key4;
-  clib_bihash_kv_8_8_t kv;
-
-  //Sanity check
-  while (n--) {
-
-    if (!kp_pod_find_index_vip(vip, &addresses[n], &i)) {
-      if (kpm->pods[i].flags & KP_POD_FLAGS_USED) {
-        vec_free(to_be_added);
-        vec_free(to_be_updated);
-        kp_put_writer_lock();
-        return VNET_API_ERROR_VALUE_EXIST;
-      }
-      vec_add1(to_be_updated, i);
-      goto next;
-    }
-
-    if (ip46_address_type(&addresses[n]) != type) {
-      vec_free(to_be_added);
-      vec_free(to_be_updated);
-      kp_put_writer_lock();
-      return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
-    }
-
-    if (n) {
-      u32 n2 = n;
-      while(n2--) //Check for duplicates
-        if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
-            addresses[n2].as_u64[1] == addresses[n].as_u64[1])
-          goto next;
-    }
-
-    vec_add1(to_be_added, n);
-
-next:
-    continue;
-  }
-
-  //Update reused PODs
-  vec_foreach(ip, to_be_updated) {
-    kpm->pods[*ip].flags = KP_POD_FLAGS_USED;
-  }
-  vec_free(to_be_updated);
-
-  //Create those who have to be created
-  vec_foreach(ip, to_be_added) {
-    kp_pod_t *pod;
-    u32 *pod_index;
-    pool_get(kpm->pods, pod);
-    pod->address = addresses[*ip];
-    pod->flags = KP_POD_FLAGS_USED;
-    pod->vip_index = vip_index;
-    pool_get(vip->pod_indexes, pod_index);
-    *pod_index = pod - kpm->pods;
-
-    /*
-     * become a child of the FIB entry
-     * so we are informed when its forwarding changes
-     */
-    fib_prefix_t nh = {};
-    if (kp_vip_is_nat4(vip)) {
-	nh.fp_addr.ip4 = pod->address.ip4;
-	nh.fp_len = 32;
-	nh.fp_proto = FIB_PROTOCOL_IP4;
-    } else {
-	nh.fp_addr.ip6 = pod->address.ip6;
-	nh.fp_len = 128;
-	nh.fp_proto = FIB_PROTOCOL_IP6;
-    }
-
-    pod->next_hop_fib_entry_index =
-	fib_table_entry_special_add(0,
-				    &nh,
-				    FIB_SOURCE_RR,
-				    FIB_ENTRY_FLAG_NONE);
-    pod->next_hop_child_index =
-	fib_entry_child_add(pod->next_hop_fib_entry_index,
-			    kpm->fib_node_type,
-			    pod - kpm->pods);
-
-    kp_pod_stack(pod);
-
-    /* Add SNAT static mapping */
-    pool_get (kpm->snat_mappings, m);
-    memset (m, 0, sizeof (*m));
-    if (kp_vip_is_nat4(vip)) {
-	m_key4.addr = pod->address.ip4;
-	m_key4.port = vip->target_port;
-	m_key4.protocol = 0;
-	m_key4.fib_index = 0;
-
-        m->vip.ip4 = vip->prefix.ip4;;
-        m->node_ip.ip4.as_u32 = 0;
-        m->pod_ip.ip4 = pod->address.ip4;
-        m->vip_is_ipv6 = 0;
-        m->node_ip_is_ipv6 = 0;
-        m->pod_ip_is_ipv6 = 0;
-        m->port = vip->port;
-        m->node_port = vip->node_port;
-        m->target_port = vip->target_port;
-	m->vrf_id = 0;
-	m->fib_index = 0;
-
-	kv.key = m_key4.as_u64;
-	kv.value = m - kpm->snat_mappings;
-	clib_bihash_add_del_8_8(&kpm->mapping_by_pod, &kv, 1);
-    } else {
-	/* TBD */
-    }
-
-  }
-  vec_free(to_be_added);
-
-  //Recompute flows
-  kp_vip_update_new_flow_table(vip);
-
-  //Garbage collection maybe
-  kp_vip_garbage_collection(vip);
-
-  kp_put_writer_lock();
-  return 0;
-}
-
-int kp_vip_del_pods_withlock(u32 vip_index, ip46_address_t *addresses, u32 n)
-{
-  kp_main_t *kpm = &kp_main;
-  u32 now = (u32) vlib_time_now(vlib_get_main());
-  u32 *ip = 0;
-
-  kp_vip_t *vip;
-  if (!(vip = kp_vip_get_by_index(vip_index))) {
-    return VNET_API_ERROR_NO_SUCH_ENTRY;
-  }
-
-  u32 *indexes = NULL;
-  while (n--) {
-    u32 i;
-    if (kp_pod_find_index_vip(vip, &addresses[n], &i)) {
-      vec_free(indexes);
-      return VNET_API_ERROR_NO_SUCH_ENTRY;
-    }
-
-    if (n) { //Check for duplicates
-      u32 n2 = n - 1;
-      while(n2--) {
-        if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
-            addresses[n2].as_u64[1] == addresses[n].as_u64[1])
-          goto next;
-      }
-    }
-
-    vec_add1(indexes, i);
-next:
-  continue;
-  }
-
-  //Garbage collection maybe
-  kp_vip_garbage_collection(vip);
-
-  if (indexes != NULL) {
-    vec_foreach(ip, indexes) {
-      kpm->pods[*ip].flags &= ~KP_POD_FLAGS_USED;
-      kpm->pods[*ip].last_used = now;
-    }
-
-    //Recompute flows
-    kp_vip_update_new_flow_table(vip);
-  }
-
-  vec_free(indexes);
-  return 0;
-}
-
-int kp_vip_del_pods(u32 vip_index, ip46_address_t *addresses, u32 n)
-{
-  kp_get_writer_lock();
-  int ret = kp_vip_del_pods_withlock(vip_index, addresses, n);
-  kp_put_writer_lock();
-  return ret;
-}
-
-/**
- * Add the VIP adjacency to the ip4 or ip6 fib
- */
-static void kp_vip_add_adjacency(kp_main_t *kpm, kp_vip_t *vip)
-{
-  dpo_proto_t proto = 0;
-  dpo_id_t dpo = DPO_INVALID;
-  fib_prefix_t pfx = {};
-  if (kp_vip_is_ip4(vip)) {
-      pfx.fp_addr.ip4 = vip->prefix.ip4;
-      pfx.fp_len = vip->plen - 96;
-      pfx.fp_proto = FIB_PROTOCOL_IP4;
-      proto = DPO_PROTO_IP4;
-  } else {
-      pfx.fp_addr.ip6 = vip->prefix.ip6;
-      pfx.fp_len = vip->plen;
-      pfx.fp_proto = FIB_PROTOCOL_IP6;
-      proto = DPO_PROTO_IP6;
-  }
-  dpo_set(&dpo, kp_vip_is_nat4(vip)?kpm->dpo_nat4_type:kpm->dpo_nat6_type,
-      proto, vip - kpm->vips);
-  fib_table_entry_special_dpo_add(0,
-				  &pfx,
-				  FIB_SOURCE_PLUGIN_HI,
-				  FIB_ENTRY_FLAG_EXCLUSIVE,
-				  &dpo);
-  dpo_reset(&dpo);
-}
-
-/**
- * Deletes the adjacency podsociated with the VIP
- */
-static void kp_vip_del_adjacency(kp_main_t *kpm, kp_vip_t *vip)
-{
-  fib_prefix_t pfx = {};
-  if (kp_vip_is_ip4(vip)) {
-      pfx.fp_addr.ip4 = vip->prefix.ip4;
-      pfx.fp_len = vip->plen - 96;
-      pfx.fp_proto = FIB_PROTOCOL_IP4;
-  } else {
-      pfx.fp_addr.ip6 = vip->prefix.ip6;
-      pfx.fp_len = vip->plen;
-      pfx.fp_proto = FIB_PROTOCOL_IP6;
-  }
-  fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI);
-}
-
-int kp_vip_add(ip46_address_t *prefix, u8 plen, kp_vip_type_t type,
-	       u32 new_length, u32 *vip_index,
-	       u16 port, u16 target_port, u16 node_port)
-{
-  kp_main_t *kpm = &kp_main;
-  vlib_main_t *vm = kpm->vlib_main;
-  kp_vip_t *vip;
-  u32 key, *key_copy;
-  uword * entry;
-
-  kp_get_writer_lock();
-  ip46_prefix_normalize(prefix, plen);
-
-  if (!kp_vip_find_index_with_lock(prefix, plen, vip_index)) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_VALUE_EXIST;
-  }
-
-  if (!is_pow2(new_length)) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_INVALID_MEMORY_SIZE;
-  }
-
-  if (ip46_prefix_is_ip4(prefix, plen) &&
-      (type != KP_VIP_TYPE_IP4_NAT44) &&
-      (type != KP_VIP_TYPE_IP4_NAT46)) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
-  }
-
-
-  //Allocate
-  pool_get(kpm->vips, vip);
-
-  //Init
-  vip->prefix = *prefix;
-  vip->plen = plen;
-  vip->port = clib_host_to_net_u16(port);
-  vip->target_port = clib_host_to_net_u16(target_port);
-  vip->node_port = clib_host_to_net_u16(node_port);
-  vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main());
-  vip->type = type;
-  vip->flags = KP_VIP_FLAGS_USED;
-  vip->pod_indexes = 0;
-
-  //Validate counters
-  u32 i;
-  for (i = 0; i < KP_N_VIP_COUNTERS; i++) {
-    vlib_validate_simple_counter(&kpm->vip_counters[i], vip - kpm->vips);
-    vlib_zero_simple_counter(&kpm->vip_counters[i], vip - kpm->vips);
-  }
-
-  //Configure new flow table
-  vip->new_flow_table_mask = new_length - 1;
-  vip->new_flow_table = 0;
-
-  //Create a new flow hash table full of the default entry
-  kp_vip_update_new_flow_table(vip);
-
-  //Create adjacency to direct traffic
-  kp_vip_add_adjacency(kpm, vip);
-
-  //Create maping from nodeport to vip_index
-  key = clib_host_to_net_u16(node_port);
-  entry = hash_get_mem (kpm->nodeport_by_key, &key);
-  if (entry) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_VALUE_EXIST;
-  }
-
-  key_copy = clib_mem_alloc (sizeof (*key_copy));
-  clib_memcpy (key_copy, &key, sizeof (*key_copy));
-  hash_set_mem (kpm->nodeport_by_key, key_copy, vip - kpm->vips);
-
-  /* receive packets destined to NodeIP:NodePort */
-  udp_register_dst_port (vm, node_port, kp4_nodeport_node.index, 1);
-  udp_register_dst_port (vm, node_port, kp6_nodeport_node.index, 0);
-
-  //Return result
-  *vip_index = vip - kpm->vips;
-
-  kp_put_writer_lock();
-  return 0;
-}
-
-int kp_vip_del(u32 vip_index)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip;
-  kp_get_writer_lock();
-  if (!(vip = kp_vip_get_by_index(vip_index))) {
-    kp_put_writer_lock();
-    return VNET_API_ERROR_NO_SUCH_ENTRY;
-  }
-
-  //FIXME: This operation is actually not working
-  //We will need to remove state before performing this.
-
-  {
-    //Remove all PODs
-    ip46_address_t *pods = 0;
-    kp_pod_t *pod;
-    u32 *pod_index;
-    pool_foreach(pod_index, vip->pod_indexes, {
-        pod = &kpm->pods[*pod_index];
-        vec_add1(pods, pod->address);
-    });
-    if (vec_len(pods))
-      kp_vip_del_pods_withlock(vip_index, pods, vec_len(pods));
-    vec_free(pods);
-  }
-
-  //Delete adjacency
-  kp_vip_del_adjacency(kpm, vip);
-
-  //Set the VIP pod unused
-  vip->flags &= ~KP_VIP_FLAGS_USED;
-
-  kp_put_writer_lock();
-  return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_PLUGIN_REGISTER () = {
-    .version = VPP_BUILD_VER,
-    .description = "kube-proxy data plane",
-};
-/* *INDENT-ON* */
-
-u8 *format_kp_dpo (u8 * s, va_list * va)
-{
-  index_t index = va_arg (*va, index_t);
-  CLIB_UNUSED(u32 indent) = va_arg (*va, u32);
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip = pool_elt_at_index (kpm->vips, index);
-  return format (s, "%U", format_kp_vip, vip);
-}
-
-static void kp_dpo_lock (dpo_id_t *dpo) {}
-static void kp_dpo_unlock (dpo_id_t *dpo) {}
-
-static fib_node_t *
-kp_fib_node_get_node (fib_node_index_t index)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_pod_t *pod = pool_elt_at_index (kpm->pods, index);
-  return (&pod->fib_node);
-}
-
-static void
-kp_fib_node_last_lock_gone (fib_node_t *node)
-{
-}
-
-static kp_pod_t *
-kp_pod_from_fib_node (fib_node_t *node)
-{
-  return ((kp_pod_t*)(((char*)node) -
-      STRUCT_OFFSET_OF(kp_pod_t, fib_node)));
-}
-
-static void
-kp_pod_stack (kp_pod_t *pod)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip = &kpm->vips[pod->vip_index];
-  dpo_stack(kp_vip_is_nat4(vip)?kpm->dpo_nat4_type:kpm->dpo_nat6_type,
-	    kp_vip_is_ip4(vip)?DPO_PROTO_IP4:DPO_PROTO_IP6,
-	    &pod->dpo,
-	    fib_entry_contribute_ip_forwarding(
-		pod->next_hop_fib_entry_index));
-}
-
-static fib_node_back_walk_rc_t
-kp_fib_node_back_walk_notify (fib_node_t *node,
-			       fib_node_back_walk_ctx_t *ctx)
-{
-    kp_pod_stack(kp_pod_from_fib_node(node));
-    return (FIB_NODE_BACK_WALK_CONTINUE);
-}
-
-int kp_nat4_interface_add_del (u32 sw_if_index, int is_del)
-{
-  if (is_del)
-    {
-      vnet_feature_enable_disable ("ip4-unicast", "kp-nat4-in2out",
-                                   sw_if_index, 0, 0, 0);
-    }
-  else
-    {
-      vnet_feature_enable_disable ("ip4-unicast", "kp-nat4-in2out",
-                                   sw_if_index, 1, 0, 0);
-    }
-
-  return 0;
-}
-
-clib_error_t *
-kp_init (vlib_main_t * vm)
-{
-  vlib_thread_main_t *tm = vlib_get_thread_main ();
-  kp_main_t *kpm = &kp_main;
-  kpm->vnet_main = vnet_get_main ();
-  kpm->vlib_main = vm;
-
-  kp_pod_t *default_pod;
-  fib_node_vft_t kp_fib_node_vft = {
-      .fnv_get = kp_fib_node_get_node,
-      .fnv_last_lock = kp_fib_node_last_lock_gone,
-      .fnv_back_walk = kp_fib_node_back_walk_notify,
-  };
-  dpo_vft_t kp_vft = {
-      .dv_lock = kp_dpo_lock,
-      .dv_unlock = kp_dpo_unlock,
-      .dv_format = format_kp_dpo,
-  };
-
-  kpm->vips = 0;
-  kpm->per_cpu = 0;
-  vec_validate(kpm->per_cpu, tm->n_vlib_mains - 1);
-  kpm->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,  CLIB_CACHE_LINE_BYTES);
-  kpm->writer_lock[0] = 0;
-  kpm->per_cpu_sticky_buckets = KP_DEFAULT_PER_CPU_STICKY_BUCKETS;
-  kpm->flow_timeout = KP_DEFAULT_FLOW_TIMEOUT;
-  kpm->dpo_nat4_type = dpo_register_new_type(&kp_vft, kp_dpo_nat4_nodes);
-  kpm->dpo_nat6_type = dpo_register_new_type(&kp_vft, kp_dpo_nat6_nodes);
-  kpm->fib_node_type = fib_node_register_new_type(&kp_fib_node_vft);
-
-  //Init POD reference counters
-  vlib_refcount_init(&kpm->pod_refcount);
-
-  //Allocate and init default POD.
-  kpm->pods = 0;
-  pool_get(kpm->pods, default_pod);
-  default_pod->flags = 0;
-  default_pod->dpo.dpoi_next_node = KP_NEXT_DROP;
-  default_pod->vip_index = ~0;
-  default_pod->address.ip6.as_u64[0] = 0xffffffffffffffffL;
-  default_pod->address.ip6.as_u64[1] = 0xffffffffffffffffL;
-
-  kpm->nodeport_by_key
-    = hash_create_mem (0, sizeof(u16), sizeof (uword));
-
-  clib_bihash_init_8_8 (&kpm->mapping_by_pod,
-                        "mapping_by_pod", KP_MAPPING_BUCKETS,
-			KP_MAPPING_MEMORY_SIZE);
-
-#define _(a,b,c) kpm->vip_counters[c].name = b;
-  kp_foreach_vip_counter
-#undef _
-  return NULL;
-}
-
-VLIB_INIT_FUNCTION (kp_init);
diff --git a/src/plugins/kubeproxy/kp.h b/src/plugins/kubeproxy/kp.h
deleted file mode 100644
index 243c002833f..00000000000
--- a/src/plugins/kubeproxy/kp.h
+++ /dev/null
@@ -1,473 +0,0 @@
-/*
- * Copyright (c) 2017 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * kp-plugin implements a MagLev-like load balancer.
- * http://research.google.com/pubs/pub44824.html
- *
- * It hasn't been tested for interoperability with the original MagLev
- * but intends to provide similar functionality.
- * The kube-proxy receives traffic destined to VIP (Virtual IP)
- * addresses from one or multiple(ECMP) routers.
- * The kube-proxy tunnels the traffic toward many application servers
- * ensuring session stickyness (i.e. that a single sessions is tunneled
- * towards a single application server).
- *
- */
-
-#ifndef KP_PLUGIN_KP_KP_H_
-#define KP_PLUGIN_KP_KP_H_
-
-#include <vnet/util/refcount.h>
-#include <vnet/vnet.h>
-#include <vnet/ip/ip.h>
-#include <vnet/dpo/dpo.h>
-#include <vnet/fib/fib_table.h>
-#include <vppinfra/bihash_8_8.h>
-
-#include <kubeproxy/kphash.h>
-
-#define KP_DEFAULT_PER_CPU_STICKY_BUCKETS 1 << 10
-#define KP_DEFAULT_FLOW_TIMEOUT 40
-#define KP_MAPPING_BUCKETS  1024
-#define KP_MAPPING_MEMORY_SIZE  64<<20
-
-typedef enum {
-  KP_NEXT_DROP,
-  KP_N_NEXT,
-} kp_next_t;
-
-typedef enum {
-  KP_NAT4_IN2OUT_NEXT_DROP,
-  KP_NAT4_IN2OUT_NEXT_LOOKUP,
-  KP_NAT4_IN2OUT_N_NEXT,
-} kp_nat4_in2out_next_t;
-
-#define foreach_kp_nat_in2out_error                       \
-_(UNSUPPORTED_PROTOCOL, "Unsupported protocol")         \
-_(IN2OUT_PACKETS, "Good in2out packets processed")      \
-_(NO_TRANSLATION, "No translation")
-
-typedef enum {
-#define _(sym,str) KP_NAT_IN2OUT_ERROR_##sym,
-  foreach_kp_nat_in2out_error
-#undef _
-  KP_NAT_IN2OUT_N_ERROR,
-} kp_nat_in2out_error_t;
-
-/**
- * kube-proxy supports three types of service
- */
-typedef enum {
-  KP_SVR_TYPE_VIP_PORT,
-  KP_SVR_TYPE_NODEIP_PORT,
-  KP_SVR_TYPE_EXT_LB,
-  KP_SVR_N_TYPES,
-} kp_svr_type_t;
-
-typedef enum {
-  KP_NODEPORT_NEXT_IP4_NAT4,
-  KP_NODEPORT_NEXT_IP4_NAT6,
-  KP_NODEPORT_NEXT_IP6_NAT4,
-  KP_NODEPORT_NEXT_IP6_NAT6,
-  KP_NODEPORT_NEXT_DROP,
-  KP_NODEPORT_N_NEXT,
-} kp_nodeport_next_t;
-
-/**
- * Each VIP is configured with a set of PODs
- */
-typedef struct {
-  /**
-   * Registration to FIB event.
-   */
-  fib_node_t fib_node;
-
-  /**
-   * Destination address used to transfer traffic towards to that POD.
-   * The address is also used pod ID and pseudo-random
-   * seed for the load-balancing process.
-   */
-  ip46_address_t address;
-
-  /**
-   * PODs are indexed by address and VIP Index.
-   * Which means there will be duplicated if the same server
-   * address is used for multiple VIPs.
-   */
-  u32 vip_index;
-
-  /**
-   * Some per-POD flags.
-   * For now only KP_POD_FLAGS_USED is defined.
-   */
-  u8 flags;
-
-#define KP_POD_FLAGS_USED 0x1
-
-  /**
-   * Rotating timestamp of when KP_POD_FLAGS_USED flag was last set.
-   *
-   * POD removal is based on garbage collection and reference counting.
-   * When an POD is removed, there is a race between configuration core
-   * and worker cores which may still add a reference while it should not
-   * be used. This timestamp is used to not remove the POD while a race condition
-   * may happen.
-   */
-  u32 last_used;
-
-  /**
-   * The FIB entry index for the next-hop
-   */
-  fib_node_index_t next_hop_fib_entry_index;
-
-  /**
-   * The child index on the FIB entry
-   */
-  u32 next_hop_child_index;
-
-  /**
-   * The next DPO in the graph to follow.
-   */
-  dpo_id_t dpo;
-
-} kp_pod_t;
-
-format_function_t format_kp_pod;
-
-typedef struct {
-  u32 pod_index;
-} kp_new_flow_entry_t;
-
-#define kp_foreach_vip_counter \
- _(NEXT_PACKET, "packet from existing sessions", 0) \
- _(FIRST_PACKET, "first session packet", 1) \
- _(UNTRACKED_PACKET, "untracked packet", 2) \
- _(NO_SERVER, "no server configured", 3)
-
-typedef enum {
-#define _(a,b,c) KP_VIP_COUNTER_##a = c,
-  kp_foreach_vip_counter
-#undef _
-  KP_N_VIP_COUNTERS
-} kp_vip_counter_t;
-
-/**
- * kube-proxy supports IPv4 and IPv6 traffic
- * and NAT4 and NAT6.
- */
-typedef enum {
-  KP_VIP_TYPE_IP4_NAT44,
-  KP_VIP_TYPE_IP4_NAT46,
-  KP_VIP_TYPE_IP6_NAT64,
-  KP_VIP_TYPE_IP6_NAT66,
-  KP_VIP_N_TYPES,
-} kp_vip_type_t;
-
-format_function_t format_kp_vip_type;
-unformat_function_t unformat_kp_vip_type;
-
-/**
- * Load balancing service is provided per VIP.
- * In this data model, a VIP can be a whole prefix.
- * But load balancing only
- * occurs on a per-source-address/port basis. Meaning that if a given source
- * reuses the same port for multiple destinations within the same VIP,
- * they will be considered as a single flow.
- */
-typedef struct {
-
-  //Runtime
-
-  /**
-   * Vector mapping (flow-hash & new_connect_table_mask) to POD index.
-   * This is used for new flows.
-   */
-  kp_new_flow_entry_t *new_flow_table;
-
-  /**
-   * New flows table length - 1
-   * (length MUST be a power of 2)
-   */
-  u32 new_flow_table_mask;
-
-  /**
-   * last time garbage collection was run to free the PODs.
-   */
-  u32 last_garbage_collection;
-
-  //Not runtime
-
-  /**
-   * A Virtual IP represents a given service delivered
-   * by a set of PODs. It can be a single
-   * address or a prefix.
-   * IPv4 prefixes are encoded using IPv4-in-IPv6 embedded address
-   * (i.e. ::/96 prefix).
-   */
-  ip46_address_t prefix;
-
-  /**
-   * The VIP prefix length.
-   * In case of IPv4, plen = 96 + ip4_plen.
-   */
-  u8 plen;
-
-  /**
-   * Service port. network byte order
-   */
-  u16 port;
-
-  /**
-   * Pod's port corresponding to specific service. network byte order
-   */
-  u16 target_port;
-
-  /**
-   * Node's port, can access service via NodeIP:node_port. network byte order
-   */
-  u16 node_port;
-
-
-  /**
-   * The type of traffic for this.
-   * KP_TYPE_UNDEFINED if unknown.
-   */
-  kp_vip_type_t type;
-
-  /**
-   * Flags related to this VIP.
-   * KP_VIP_FLAGS_USED means the VIP is active.
-   * When it is not set, the VIP in the process of being removed.
-   * We cannot immediately remove a VIP because the VIP index still may be stored
-   * in the adjacency index.
-   */
-  u8 flags;
-#define KP_VIP_FLAGS_USED 0x1
-
-  /**
-   * Pool of POD indexes used for this VIP.
-   * This also includes PODs that have been removed (but are still referenced).
-   */
-  u32 *pod_indexes;
-
-} kp_vip_t;
-
-/*
- * mapping from nodeport to vip_index
- */
-typedef struct {
-
-  u32 vip_index;
-
-} kp_nodeport_t;
-
-#define kp_vip_is_ip4(vip) ((vip)->type == KP_VIP_TYPE_IP4_NAT44 \
-                            || (vip)->type == KP_VIP_TYPE_IP4_NAT46)
-#define kp_vip_is_nat4(vip) ((vip)->type == KP_VIP_TYPE_IP6_NAT64 \
-                            || (vip)->type == KP_VIP_TYPE_IP4_NAT44)
-format_function_t format_kp_vip;
-format_function_t format_kp_vip_detailed;
-
-#define foreach_kp_nat_protocol \
-  _(UDP, 0, udp, "udp")       \
-  _(TCP, 1, tcp, "tcp")
-
-typedef enum {
-#define _(N, i, n, s) KP_NAT_PROTOCOL_##N = i,
-  foreach_kp_nat_protocol
-#undef _
-} kp_nat_protocol_t;
-
-always_inline u32
-kp_ip_proto_to_nat_proto (u8 ip_proto)
-{
-  u32 nat_proto = ~0;
-
-  nat_proto = (ip_proto == IP_PROTOCOL_UDP) ? KP_NAT_PROTOCOL_UDP : nat_proto;
-  nat_proto = (ip_proto == IP_PROTOCOL_TCP) ? KP_NAT_PROTOCOL_TCP : nat_proto;
-
-  return nat_proto;
-}
-
-/* Key for Pod's egress SNAT */
-typedef struct {
-  union
-  {
-    struct
-    {
-      ip4_address_t addr;
-      u16 port;
-      u16 protocol:3,
-        fib_index:13;
-    };
-    u64 as_u64;
-  };
-} kp_snat4_key_t;
-
-typedef struct
-{
-  ip6_address_t prefix;
-  u8 plen;
-  u32 vrf_id;
-  u32 fib_index;
-} kp_snat6_key_t;
-
-typedef struct {
-  kp_svr_type_t svr_type;
-  ip46_address_t vip;
-  ip46_address_t node_ip;
-  ip46_address_t pod_ip;
-  u8 vip_is_ipv6;
-  u8 node_ip_is_ipv6;
-  u8 pod_ip_is_ipv6;
-  u16 port;        /* Network byte order */
-  u16 node_port;   /* Network byte order */
-  u16 target_port; /* Network byte order */
-  u32 vrf_id;
-  u32 fib_index;
-} kp_snat_mapping_t;
-
-typedef struct {
-  /**
-   * Each CPU has its own sticky flow hash table.
-   * One single table is used for all VIPs.
-   */
-  kp_hash_t *sticky_ht;
-
-} kp_per_cpu_t;
-
-typedef struct {
-  /**
-   * Pool of all Virtual IPs
-   */
-  kp_vip_t *vips;
-
-  /**
-   * Pool of PODs.
-   * PODs are referenced by address and vip index.
-   * The first element (index 0) is special and used only to fill
-   * new_flow_tables when no POD has been configured.
-   */
-  kp_pod_t *pods;
-
-  /**
-   * Each POD has an associated reference counter.
-   * As pods[0] has a special meaning, its associated counter
-   * starts at 0 and is decremented instead. i.e. do not use it.
-   */
-  vlib_refcount_t pod_refcount;
-
-  /* hash lookup vip_index by key: {u16: nodeport} */
-  uword * nodeport_by_key;
-
-
-  /**
-   * Some global data is per-cpu
-   */
-  kp_per_cpu_t *per_cpu;
-
-  /**
-   * Node next index for IP adjacencies, for each of the traffic types.
-   */
-  u32 ip_lookup_next_index[KP_VIP_N_TYPES];
-
-  /**
-   * Number of buckets in the per-cpu sticky hash table.
-   */
-  u32 per_cpu_sticky_buckets;
-
-  /**
-   * Flow timeout in seconds.
-   */
-  u32 flow_timeout;
-
-  /**
-   * Per VIP counter
-   */
-  vlib_simple_counter_main_t vip_counters[KP_N_VIP_COUNTERS];
-
-  /**
-   * DPO used to send packet from IP4/6 lookup to KP node.
-   */
-  dpo_type_t dpo_nat4_type;
-  dpo_type_t dpo_nat6_type;
-
-  /**
-   * Node type for registering to fib changes.
-   */
-  fib_node_type_t fib_node_type;
-
-  /* Find a static mapping by pod IP : target_port */
-  clib_bihash_8_8_t mapping_by_pod;
-
-  /* Static mapping pool */
-  kp_snat_mapping_t * snat_mappings;
-
-  /**
-   * API dynamically registered base ID.
-   */
-  u16 msg_id_base;
-
-  volatile u32 *writer_lock;
-
-  /* convenience */
-  vlib_main_t *vlib_main;
-  vnet_main_t *vnet_main;
-} kp_main_t;
-
-#define ip46_address_type(ip46) (ip46_address_is_ip4(ip46)?IP46_TYPE_IP4:IP46_TYPE_IP6)
-#define ip46_prefix_is_ip4(ip46, len) ((len) >= 96 && ip46_address_is_ip4(ip46))
-#define ip46_prefix_type(ip46, len) (ip46_prefix_is_ip4(ip46, len)?IP46_TYPE_IP4:IP46_TYPE_IP6)
-
-void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen);
-uword unformat_ip46_prefix (unformat_input_t * input, va_list * args);
-u8 *format_ip46_prefix (u8 * s, va_list * args);
-
-
-extern kp_main_t kp_main;
-extern vlib_node_registration_t kp4_node;
-extern vlib_node_registration_t kp6_node;
-extern vlib_node_registration_t kp4_nodeport_node;
-extern vlib_node_registration_t kp6_nodeport_node;
-extern vlib_node_registration_t kp_nat4_in2out_node;
-
-/**
- * Fix global kube-proxy parameters.
- * @return 0 on success. VNET_KP_ERR_XXX on error
- */
-int kp_conf(u32 sticky_buckets, u32 flow_timeout);
-
-int kp_vip_add(ip46_address_t *prefix, u8 plen, kp_vip_type_t type,
-	       u32 new_length, u32 *vip_index,
-	       u16 port, u16 target_port, u16 node_port);
-int kp_vip_del(u32 vip_index);
-
-int kp_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index);
-
-#define kp_vip_get_by_index(index) (pool_is_free_index(kp_main.vips, index)?NULL:pool_elt_at_index(kp_main.vips, index))
-
-int kp_vip_add_pods(u32 vip_index, ip46_address_t *addresses, u32 n);
-int kp_vip_del_pods(u32 vip_index, ip46_address_t *addresses, u32 n);
-
-u32 kp_hash_time_now(vlib_main_t * vm);
-
-void kp_garbage_collection();
-
-int kp_nat4_interface_add_del (u32 sw_if_index, int is_del);
-
-format_function_t format_kp_main;
-
-#endif /* KP_PLUGIN_KP_KP_H_ */
diff --git a/src/plugins/kubeproxy/kp_api.c b/src/plugins/kubeproxy/kp_api.c
deleted file mode 100644
index 56b247a395e..00000000000
--- a/src/plugins/kubeproxy/kp_api.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * Copyright (c) 2016 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <kubeproxy/kp.h>
-
-#include <vppinfra/byte_order.h>
-#include <vlibapi/api.h>
-#include <vlibmemory/api.h>
-
-#define vl_msg_id(n,h) n,
-typedef enum {
-#include <kubeproxy/kp.api.h>
-    /* We'll want to know how many messages IDs we need... */
-    VL_MSG_FIRST_AVAILABLE,
-} vl_msg_id_t;
-#undef vl_msg_id
-
-
-/* define message structures */
-#define vl_typedefs
-#include <kubeproxy/kp.api.h>
-#undef vl_typedefs
-
-/* define generated endian-swappers */
-#define vl_endianfun
-#include <kubeproxy/kp.api.h>
-#undef vl_endianfun
-
-#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
-
-/* Get the API version number */
-#define vl_api_version(n,v) static u32 api_version=(v);
-#include <kubeproxy/kp.api.h>
-#undef vl_api_version
-
-#define vl_msg_name_crc_list
-#include <kubeproxy/kp.api.h>
-#undef vl_msg_name_crc_list
-
-
-#define REPLY_MSG_ID_BASE kpm->msg_id_base
-#include <vlibapi/api_helper_macros.h>
-
-static void
-setup_message_id_table (kp_main_t * kpm, api_main_t * am)
-{
-#define _(id,n,crc) \
-  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + kpm->msg_id_base);
-  foreach_vl_msg_name_crc_kp;
-#undef _
-}
-
-/* Macro to finish up custom dump fns */
-#define FINISH                                  \
-    vec_add1 (s, 0);                            \
-    vl_print (handle, (char *)s);               \
-    vec_free (s);                               \
-    return handle;
-
-static void
-vl_api_kp_conf_t_handler
-(vl_api_kp_conf_t * mp)
-{
-  kp_main_t *kpm = &kp_main;
-  vl_api_kp_conf_reply_t * rmp;
-  int rv = 0;
-
-  rv = kp_conf(mp->sticky_buckets_per_core,
-               mp->flow_timeout);
-
- REPLY_MACRO (VL_API_KP_CONF_REPLY);
-}
-
-static void *vl_api_kp_conf_t_print
-(vl_api_kp_conf_t *mp, void * handle)
-{
-  u8 * s;
-  s = format (0, "SCRIPT: kp_conf ");
-  s = format (s, "%u ", mp->sticky_buckets_per_core);
-  s = format (s, "%u ", mp->flow_timeout);
-  FINISH;
-}
-
-
-static void
-vl_api_kp_add_del_vip_t_handler
-(vl_api_kp_add_del_vip_t * mp)
-{
-  kp_main_t *kpm = &kp_main;
-  vl_api_kp_conf_reply_t * rmp;
-  int rv = 0;
-  ip46_address_t prefix;
-  u8 prefix_length = mp->prefix_length;
-
-  if (mp->is_ipv6 == 0)
-    {
-      prefix_length += 96;
-      memcpy(&prefix.ip4, mp->ip_prefix, sizeof(prefix.ip4));
-      prefix.pad[0] = prefix.pad[1] = prefix.pad[2] = 0;
-    }
-  else
-    {
-      memcpy(&prefix.ip6, mp->ip_prefix, sizeof(prefix.ip6));
-    }
-
-  if (mp->is_del) {
-    u32 vip_index;
-    if (!(rv = kp_vip_find_index(&prefix, prefix_length, &vip_index)))
-      rv = kp_vip_del(vip_index);
-  } else {
-    u32 vip_index;
-    kp_vip_type_t type;
-    if (mp->is_ipv6 == 0) {
-      type = mp->is_nat4?KP_VIP_TYPE_IP4_NAT44:KP_VIP_TYPE_IP4_NAT46;
-    } else {
-      type = mp->is_nat4?KP_VIP_TYPE_IP6_NAT64:KP_VIP_TYPE_IP6_NAT66;
-    }
-
-    rv = kp_vip_add(&prefix, prefix_length, type,
-		    ntohl(mp->new_flows_table_length), &vip_index,
-		    ntohs(mp->port), ntohs(mp->target_port),
-		    ntohs(mp->node_port));
-  }
- REPLY_MACRO (VL_API_KP_CONF_REPLY);
-}
-
-static void *vl_api_kp_add_del_vip_t_print
-(vl_api_kp_add_del_vip_t *mp, void * handle)
-{
-  u8 * s;
-  s = format (0, "SCRIPT: kp_add_del_vip ");
-  s = format (s, "%U ", format_ip46_prefix,
-              (ip46_address_t *)mp->ip_prefix, mp->prefix_length, IP46_TYPE_ANY);
-  s = format (s, "port %u ", mp->port);
-  s = format (s, "target_port %u ", mp->target_port);
-  s = format (s, "node_port %u ", mp->node_port);
-  s = format (s, "%s ", mp->is_nat4?"nat4":"nat6");
-  s = format (s, "%u ", mp->new_flows_table_length);
-  s = format (s, "%s ", mp->is_del?"del":"add");
-  FINISH;
-}
-
-static void
-vl_api_kp_add_del_pod_t_handler
-(vl_api_kp_add_del_pod_t * mp)
-{
-  kp_main_t *kpm = &kp_main;
-  vl_api_kp_conf_reply_t * rmp;
-  int rv = 0;
-  u32 vip_index;
-
-  ip46_address_t vip_ip_prefix;
-  u8 vip_prefix_length = mp->vip_prefix_length;
-
-  if (mp->vip_is_ipv6 == 0)
-    {
-      vip_prefix_length += 96;
-      memcpy(&vip_ip_prefix.ip4, mp->vip_ip_prefix,
-	     sizeof(vip_ip_prefix.ip4));
-      vip_ip_prefix.pad[0] = vip_ip_prefix.pad[1] = vip_ip_prefix.pad[2] = 0;
-    }
-  else
-    {
-      memcpy(&vip_ip_prefix.ip6, mp->vip_ip_prefix,
-	     sizeof(vip_ip_prefix.ip6));
-    }
-
-  ip46_address_t pod_address;
-
-  if (mp->pod_is_ipv6 == 0)
-    {
-      memcpy(&pod_address.ip4, mp->pod_address,
-	     sizeof(pod_address.ip4));
-      pod_address.pad[0] = pod_address.pad[1] = pod_address.pad[2] = 0;
-    }
-  else
-    {
-      memcpy(&pod_address.ip6, mp->pod_address,
-	     sizeof(pod_address.ip6));
-    }
-
-  if ((rv = kp_vip_find_index(&vip_ip_prefix, vip_prefix_length, &vip_index)))
-    goto done;
-
-  if (mp->is_del)
-    rv = kp_vip_del_pods(vip_index, &pod_address, 1);
-  else
-    rv = kp_vip_add_pods(vip_index, &pod_address, 1);
-
-done:
- REPLY_MACRO (VL_API_KP_CONF_REPLY);
-}
-
-static void *vl_api_kp_add_del_pod_t_print
-(vl_api_kp_add_del_pod_t *mp, void * handle)
-{
-  u8 * s;
-  s = format (0, "SCRIPT: kp_add_del_pod ");
-  s = format (s, "%U ", format_ip46_prefix,
-              (ip46_address_t *)mp->vip_ip_prefix, mp->vip_prefix_length, IP46_TYPE_ANY);
-  s = format (s, "%U ", format_ip46_address,
-                (ip46_address_t *)mp->pod_address, IP46_TYPE_ANY);
-  s = format (s, "%s ", mp->is_del?"del":"add");
-  FINISH;
-}
-
-/* List of message types that this plugin understands */
-#define foreach_kp_plugin_api_msg            \
-_(KP_CONF, kp_conf)                          \
-_(KP_ADD_DEL_VIP, kp_add_del_vip)            \
-_(KP_ADD_DEL_POD, kp_add_del_pod)
-
-static clib_error_t * kp_api_init (vlib_main_t * vm)
-{
-  kp_main_t *kpm = &kp_main;
-  u8 *name = format (0, "kp_%08x%c", api_version, 0);
-  kpm->msg_id_base = vl_msg_api_get_msg_ids
-      ((char *) name, VL_MSG_FIRST_AVAILABLE);
-
-#define _(N,n)                                                  \
-    vl_msg_api_set_handlers((VL_API_##N + kpm->msg_id_base),     \
-                           #n,                  \
-                           vl_api_##n##_t_handler,              \
-                           vl_noop_handler,                     \
-                           vl_api_##n##_t_endian,               \
-                           vl_api_##n##_t_print,                \
-                           sizeof(vl_api_##n##_t), 1);
-  foreach_kp_plugin_api_msg;
-#undef _
-
-  /* Add our API messages to the global name_crc hash table */
-  setup_message_id_table (kpm, &api_main);
-
-  return 0;
-}
-
-VLIB_INIT_FUNCTION (kp_api_init);
diff --git a/src/plugins/kubeproxy/kp_cli.c b/src/plugins/kubeproxy/kp_cli.c
deleted file mode 100644
index 43c5c51ae53..00000000000
--- a/src/plugins/kubeproxy/kp_cli.c
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
- * Copyright (c) 2016 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <kubeproxy/kp.h>
-
-
-static clib_error_t *
-kp_vip_command_fn (vlib_main_t * vm,
-              unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  unformat_input_t _line_input, *line_input = &_line_input;
-  ip46_address_t prefix;
-  u8 plen;
-  u32 new_len = 1024;
-  u32 port = 0;
-  u32 target_port = 0;
-  u32 node_port = 0;
-  u32 del = 0;
-  int ret;
-  u32 nat4 = 0;
-  kp_vip_type_t type;
-  clib_error_t *error = 0;
-
-  if (!unformat_user (input, unformat_line_input, line_input))
-    return 0;
-
-  if (!unformat(line_input, "%U", unformat_ip46_prefix, &prefix, &plen, IP46_TYPE_ANY, &plen)) {
-    error = clib_error_return (0, "invalid vip prefix: '%U'",
-                               format_unformat_error, line_input);
-    goto done;
-  }
-
-  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
-  {
-    if (unformat(line_input, "new_len %d", &new_len))
-      ;
-    else if (unformat(line_input, "port %d", &port))
-      ;
-    else if (unformat(line_input, "target_port %d", &target_port))
-      ;
-    else if (unformat(line_input, "node_port %d", &node_port))
-      ;
-    else if (unformat(line_input, "del"))
-      del = 1;
-    else if (unformat(line_input, "nat4"))
-      nat4 = 1;
-    else if (unformat(line_input, "nat6"))
-      nat4 = 0;
-    else {
-      error = clib_error_return (0, "parse error: '%U'",
-                                format_unformat_error, line_input);
-      goto done;
-    }
-  }
-
-
-  if (ip46_prefix_is_ip4(&prefix, plen)) {
-    type = (nat4)?KP_VIP_TYPE_IP4_NAT44:KP_VIP_TYPE_IP4_NAT46;
-  } else {
-    type = (nat4)?KP_VIP_TYPE_IP6_NAT64:KP_VIP_TYPE_IP6_NAT66;
-  }
-
-  kp_garbage_collection();
-
-  u32 index;
-  if (!del) {
-    if ((ret = kp_vip_add(&prefix, plen, type, new_len, &index,
-			  (u16)port, (u16)target_port, (u16)node_port))) {
-      error = clib_error_return (0, "kp_vip_add error %d", ret);
-      goto done;
-    } else {
-      vlib_cli_output(vm, "kp_vip_add ok %d", index);
-    }
-  } else {
-    if ((ret = kp_vip_find_index(&prefix, plen, &index))) {
-      error = clib_error_return (0, "kp_vip_find_index error %d", ret);
-      goto done;
-    } else if ((ret = kp_vip_del(index))) {
-      error = clib_error_return (0, "kp_vip_del error %d", ret);
-      goto done;
-    }
-  }
-
-done:
-  unformat_free (line_input);
-
-  return error;
-}
-
-VLIB_CLI_COMMAND (kp_vip_command, static) =
-{
-  .path = "kube-proxy vip",
-  .short_help = "kube-proxy vip <prefix> port <n> target_port <n>"
-                " node_port <n> [nat4|nat6)] [new_len <n>] [del]",
-  .function = kp_vip_command_fn,
-};
-
-static clib_error_t *
-kp_pod_command_fn (vlib_main_t * vm,
-              unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  unformat_input_t _line_input, *line_input = &_line_input;
-  ip46_address_t vip_prefix, pod_addr;
-  u8 vip_plen;
-  ip46_address_t *pod_array = 0;
-  u32 vip_index;
-  u8 del = 0;
-  int ret;
-  clib_error_t *error = 0;
-
-  if (!unformat_user (input, unformat_line_input, line_input))
-    return 0;
-
-  if (!unformat(line_input, "%U", unformat_ip46_prefix, &vip_prefix, &vip_plen, IP46_TYPE_ANY)) {
-    error = clib_error_return (0, "invalid pod address: '%U'",
-                               format_unformat_error, line_input);
-    goto done;
-  }
-
-  if ((ret = kp_vip_find_index(&vip_prefix, vip_plen, &vip_index))) {
-    error = clib_error_return (0, "kp_vip_find_index error %d", ret);
-    goto done;
-  }
-
-  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
-  {
-    if (unformat(line_input, "%U", unformat_ip46_address, &pod_addr, IP46_TYPE_ANY)) {
-      vec_add1(pod_array, pod_addr);
-    } else if (unformat(line_input, "del")) {
-      del = 1;
-    } else {
-      error = clib_error_return (0, "parse error: '%U'",
-                                 format_unformat_error, line_input);
-      goto done;
-    }
-  }
-
-  if (!vec_len(pod_array)) {
-    error = clib_error_return (0, "No POD address provided");
-    goto done;
-  }
-
-  kp_garbage_collection();
-  clib_warning("vip index is %d", vip_index);
-
-  if (del) {
-    if ((ret = kp_vip_del_pods(vip_index, pod_array, vec_len(pod_array)))) {
-      error = clib_error_return (0, "kp_vip_del_pods error %d", ret);
-      goto done;
-    }
-  } else {
-    if ((ret = kp_vip_add_pods(vip_index, pod_array, vec_len(pod_array)))) {
-      error = clib_error_return (0, "kp_vip_add_pods error %d", ret);
-      goto done;
-    }
-  }
-
-done:
-  unformat_free (line_input);
-  vec_free(pod_array);
-
-  return error;
-}
-
-VLIB_CLI_COMMAND (kp_pod_command, static) =
-{
-  .path = "kube-proxy pod",
-  .short_help =
-      "kube-proxy pod <vip-prefix> [<address> [<address> [...]]] [del]",
-  .function = kp_pod_command_fn,
-};
-
-static clib_error_t *
-kp_conf_command_fn (vlib_main_t * vm,
-              unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  kp_main_t *kpm = &kp_main;
-  unformat_input_t _line_input, *line_input = &_line_input;
-  u32 per_cpu_sticky_buckets = kpm->per_cpu_sticky_buckets;
-  u32 per_cpu_sticky_buckets_log2 = 0;
-  u32 flow_timeout = kpm->flow_timeout;
-  int ret;
-  clib_error_t *error = 0;
-
-  if (!unformat_user (input, unformat_line_input, line_input))
-    return 0;
-
-  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
-  {
-    if (unformat(line_input, "buckets %d", &per_cpu_sticky_buckets))
-      ;
-    else if (unformat(line_input, "buckets-log2 %d", &per_cpu_sticky_buckets_log2)) {
-      if (per_cpu_sticky_buckets_log2 >= 32)
-        return clib_error_return (0, "buckets-log2 value is too high");
-      per_cpu_sticky_buckets = 1 << per_cpu_sticky_buckets_log2;
-    } else if (unformat(line_input, "timeout %d", &flow_timeout))
-      ;
-    else {
-      error = clib_error_return (0, "parse error: '%U'",
-                                 format_unformat_error, line_input);
-      goto done;
-    }
-  }
-
-  kp_garbage_collection();
-
-  if ((ret = kp_conf(per_cpu_sticky_buckets, flow_timeout))) {
-    error = clib_error_return (0, "kp_conf error %d", ret);
-    goto done;
-  }
-
-done:
-  unformat_free (line_input);
-
-  return error;
-}
-
-VLIB_CLI_COMMAND (kp_conf_command, static) =
-{
-  .path = "kube-proxy conf",
-  .short_help = "kube-proxy conf [buckets <n>] [timeout <s>]",
-  .function = kp_conf_command_fn,
-};
-
-static clib_error_t *
-kp_show_command_fn (vlib_main_t * vm,
-              unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  vlib_cli_output(vm, "%U", format_kp_main);
-  return NULL;
-}
-
-
-VLIB_CLI_COMMAND (kp_show_command, static) =
-{
-  .path = "show kube-proxy",
-  .short_help = "show kube-proxy",
-  .function = kp_show_command_fn,
-};
-
-static clib_error_t *
-kp_show_vips_command_fn (vlib_main_t * vm,
-              unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  unformat_input_t line_input;
-  kp_main_t *kpm = &kp_main;
-  kp_vip_t *vip;
-  u8 verbose = 0;
-
-  if (!unformat_user (input, unformat_line_input, &line_input))
-      return 0;
-
-  if (unformat(&line_input, "verbose"))
-    verbose = 1;
-
-  pool_foreach(vip, kpm->vips, {
-      vlib_cli_output(vm, "%U\n", verbose?format_kp_vip_detailed:format_kp_vip, vip);
-  });
-
-  unformat_free (&line_input);
-  return NULL;
-}
-
-VLIB_CLI_COMMAND (kp_show_vips_command, static) =
-{
-  .path = "show kube-proxy vips",
-  .short_help = "show kube-proxy vips [verbose]",
-  .function = kp_show_vips_command_fn,
-};
-
-static clib_error_t *
-kp_set_interface_nat4_command_fn (vlib_main_t * vm,
-                                  unformat_input_t * input,
-                                  vlib_cli_command_t * cmd)
-{
-  unformat_input_t _line_input, *line_input = &_line_input;
-  vnet_main_t * vnm = vnet_get_main();
-  clib_error_t * error = 0;
-  u32 sw_if_index;
-  u32 * inside_sw_if_indices = 0;
-  int is_del = 0;
-  int i;
-
-  sw_if_index = ~0;
-
-  /* Get a line of input. */
-  if (!unformat_user (input, unformat_line_input, line_input))
-    return 0;
-
-  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (line_input, "in %U", unformat_vnet_sw_interface,
-                    vnm, &sw_if_index))
-        vec_add1 (inside_sw_if_indices, sw_if_index);
-      else if (unformat (line_input, "del"))
-        is_del = 1;
-      else
-        {
-          error = clib_error_return (0, "unknown input '%U'",
-            format_unformat_error, line_input);
-          goto done;
-        }
-    }
-
-  if (vec_len (inside_sw_if_indices))
-    {
-      for (i = 0; i < vec_len(inside_sw_if_indices); i++)
-        {
-          sw_if_index = inside_sw_if_indices[i];
-
-	  if (kp_nat4_interface_add_del (sw_if_index, is_del))
-	    {
-	      error = clib_error_return (0, "%s %U failed",
-					 is_del ? "del" : "add",
-					 format_vnet_sw_interface_name, vnm,
-					 vnet_get_sw_interface (vnm,
-								sw_if_index));
-	      goto done;
-	    }
-        }
-    }
-
-done:
-  unformat_free (line_input);
-  vec_free (inside_sw_if_indices);
-
-  return error;
-}
-
-VLIB_CLI_COMMAND (kp_set_interface_nat4_command, static) = {
-  .path = "kube-proxy set interface nat4",
-  .function = kp_set_interface_nat4_command_fn,
-  .short_help = "kube-proxy set interface nat4 in <intfc> [del]",
-};
-
-static clib_error_t *
-kp_flowtable_flush_command_fn(vlib_main_t * vm,
-    unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  u32 thread_index;
-  vlib_thread_main_t *tm = vlib_get_thread_main();
-  kp_main_t *kpm = &kp_main;
-
-  for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) {
-    kp_hash_t *h = kpm->per_cpu[thread_index].sticky_ht;
-    if (h != NULL) {
-        kp_hash_bucket_t *b;
-        u32 i;
-        kp_hash_foreach_entry(h, b, i) {
-          vlib_refcount_add(&kpm->pod_refcount, thread_index, b->value[i], -1);
-          vlib_refcount_add(&kpm->pod_refcount, thread_index, 0, 1);
-        }
-
-        kp_hash_free(h);
-        kpm->per_cpu[thread_index].sticky_ht = NULL;
-    }
-  }
-
-  return NULL;
-}
-
-/*
- * flush all kube-proxy flowtables
- * This is indented for debug and unit-tests purposes only
- */
-VLIB_CLI_COMMAND (kp_flowtable_flush_command, static) = {
-  .path = "test kube-proxy flowtable flush",
-  .short_help = "test kube-proxy flowtable flush",
-  .function = kp_flowtable_flush_command_fn,
-};
diff --git a/src/plugins/kubeproxy/kp_node.c b/src/plugins/kubeproxy/kp_node.c
deleted file mode 100644
index 5cee6971e35..00000000000
--- a/src/plugins/kubeproxy/kp_node.c
+++ /dev/null
@@ -1,839 +0,0 @@
-/*
- * Copyright (c) 2016 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or anated to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-#include <vnet/fib/ip4_fib.h>
-
-#include <kubeproxy/kp.h>
-#include <kubeproxy/kphash.h>
-
-#define foreach_kp_error \
- _(NONE, "no error") \
- _(PROTO_NOT_SUPPORTED, "protocol not supported")
-
-typedef enum {
-#define _(sym,str) KP_ERROR_##sym,
-  foreach_kp_error
-#undef _
-    KP_N_ERROR,
-} kp_error_t;
-
-static char *kp_error_strings[] = {
-#define _(sym,string) string,
-    foreach_kp_error
-#undef _
-};
-
-typedef struct {
-  u32 vip_index;
-  u32 pod_index;
-} kp_trace_t;
-
-typedef struct {
-  u32 vip_index;
-  u32 node_port;
-} kp_nodeport_trace_t;
-
-typedef struct {
-  u32 rx_sw_if_index;
-  u32 next_index;
-} kp_nat_trace_t;
-
-u8 *
-format_kp_trace (u8 * s, va_list * args)
-{
-  kp_main_t *kpm = &kp_main;
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  kp_trace_t *t = va_arg (*args, kp_trace_t *);
-  if (pool_is_free_index(kpm->vips, t->vip_index)) {
-      s = format(s, "kp vip[%d]: This VIP was freed since capture\n");
-  } else {
-      s = format(s, "kp vip[%d]: %U\n", t->vip_index, format_kp_vip, &kpm->vips[t->vip_index]);
-  }
-  if (pool_is_free_index(kpm->pods, t->pod_index)) {
-      s = format(s, "  kp pod[%d]: This POD was freed since capture");
-  } else {
-      s = format(s, "  kp pod[%d]: %U", t->pod_index, format_kp_pod, &kpm->pods[t->pod_index]);
-  }
-  return s;
-}
-
-u8 *
-format_kp_nat_trace (u8 * s, va_list * args)
-{
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  kp_nat_trace_t *t = va_arg (*args, kp_nat_trace_t *);
-
-  s = format(s, "kp nat: rx_sw_if_index = %d, next_index = %d",
-	     t->rx_sw_if_index, t->next_index);
-
-  return s;
-}
-
-kp_hash_t *kp_get_sticky_table(u32 thread_index)
-{
-  kp_main_t *kpm = &kp_main;
-  kp_hash_t *sticky_ht = kpm->per_cpu[thread_index].sticky_ht;
-  //Check if size changed
-  if (PREDICT_FALSE(sticky_ht && (kpm->per_cpu_sticky_buckets != kp_hash_nbuckets(sticky_ht))))
-    {
-      //Dereference everything in there
-      kp_hash_bucket_t *b;
-      u32 i;
-      kp_hash_foreach_entry(sticky_ht, b, i) {
-	vlib_refcount_add(&kpm->pod_refcount, thread_index, b->value[i], -1);
-	vlib_refcount_add(&kpm->pod_refcount, thread_index, 0, 1);
-      }
-
-      kp_hash_free(sticky_ht);
-      sticky_ht = NULL;
-    }
-
-  //Create if necessary
-  if (PREDICT_FALSE(sticky_ht == NULL)) {
-    kpm->per_cpu[thread_index].sticky_ht = kp_hash_alloc(kpm->per_cpu_sticky_buckets, kpm->flow_timeout);
-    sticky_ht = kpm->per_cpu[thread_index].sticky_ht;
-    clib_warning("Regenerated sticky table %p", sticky_ht);
-  }
-
-  ASSERT(sticky_ht);
-
-  //Update timeout
-  sticky_ht->timeout = kpm->flow_timeout;
-  return sticky_ht;
-}
-
-u64
-kp_node_get_other_ports4(ip4_header_t *ip40)
-{
-  return 0;
-}
-
-u64
-kp_node_get_other_ports6(ip6_header_t *ip60)
-{
-  return 0;
-}
-
-static_always_inline u32
-kp_node_get_hash(vlib_buffer_t *p, u8 is_input_v4)
-{
-  u32 hash;
-  if (is_input_v4)
-    {
-      ip4_header_t *ip40;
-      u64 ports;
-      ip40 = vlib_buffer_get_current (p);
-      if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_TCP ||
-		       ip40->protocol == IP_PROTOCOL_UDP))
-	ports = ((u64)((udp_header_t *)(ip40 + 1))->src_port << 16) |
-	  ((u64)((udp_header_t *)(ip40 + 1))->dst_port);
-      else
-	ports = kp_node_get_other_ports4(ip40);
-
-      hash = kp_hash_hash(*((u64 *)&ip40->address_pair), ports,
-			  0, 0, 0);
-    }
-  else
-    {
-      ip6_header_t *ip60;
-      ip60 = vlib_buffer_get_current (p);
-      u64 ports;
-      if (PREDICT_TRUE (ip60->protocol == IP_PROTOCOL_TCP ||
-			ip60->protocol == IP_PROTOCOL_UDP))
-	ports = ((u64)((udp_header_t *)(ip60 + 1))->src_port << 16) |
-	((u64)((udp_header_t *)(ip60 + 1))->dst_port);
-      else
-	ports = kp_node_get_other_ports6(ip60);
-
-      hash = kp_hash_hash(ip60->src_address.as_u64[0],
-			  ip60->src_address.as_u64[1],
-			  ip60->dst_address.as_u64[0],
-			  ip60->dst_address.as_u64[1],
-			  ports);
-    }
-  return hash;
-}
-
-static_always_inline uword
-kp_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame,
-         u8 is_input_v4, //Compile-time parameter stating that is input is v4 (or v6)
-         u8 is_nat_v4) //Compile-time parameter stating that is NAT is v4 (or v6)
-{
-  kp_main_t *kpm = &kp_main;
-  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
-  u32 thread_index = vlib_get_thread_index();
-  u32 kp_time = kp_hash_time_now(vm);
-
-  kp_hash_t *sticky_ht = kp_get_sticky_table(thread_index);
-  from = vlib_frame_vector_args (frame);
-  n_left_from = frame->n_vectors;
-  next_index = node->cached_next_index;
-
-  u32 nexthash0 = 0;
-  if (PREDICT_TRUE(n_left_from > 0))
-    nexthash0 = kp_node_get_hash(vlib_get_buffer (vm, from[0]), is_input_v4);
-
-  while (n_left_from > 0)
-  {
-    vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-    while (n_left_from > 0 && n_left_to_next > 0)
-    {
-      u32 pi0;
-      vlib_buffer_t *p0;
-      kp_vip_t *vip0;
-      u32 podindex0;
-      u32 available_index0;
-      u8 counter = 0;
-      u32 hash0 = nexthash0;
-
-      if (PREDICT_TRUE(n_left_from > 1))
-	{
-	  vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
-	  //Compute next hash and prefetch bucket
-	  nexthash0 = kp_node_get_hash(p1, is_input_v4);
-	  kp_hash_prefetch_bucket(sticky_ht, nexthash0);
-	  //Prefetch for encap, next
-	  CLIB_PREFETCH (vlib_buffer_get_current(p1) - 64, 64, STORE);
-	}
-
-      if (PREDICT_TRUE(n_left_from > 2))
-	{
-	  vlib_buffer_t *p2;
-	  p2 = vlib_get_buffer(vm, from[2]);
-	  /* prefetch packet header and data */
-	  vlib_prefetch_buffer_header(p2, STORE);
-	  CLIB_PREFETCH (vlib_buffer_get_current(p2), 64, STORE);
-	}
-
-      pi0 = to_next[0] = from[0];
-      from += 1;
-      n_left_from -= 1;
-      to_next += 1;
-      n_left_to_next -= 1;
-
-      p0 = vlib_get_buffer (vm, pi0);
-      vip0 = pool_elt_at_index (kpm->vips,
-				vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
-
-      kp_hash_get(sticky_ht, hash0, vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-		  kp_time, &available_index0, &podindex0);
-
-      if (PREDICT_TRUE(podindex0 != ~0))
-	{
-	  //Found an existing entry
-	  counter = KP_VIP_COUNTER_NEXT_PACKET;
-	}
-      else if (PREDICT_TRUE(available_index0 != ~0))
-	{
-	  //There is an available slot for a new flow
-	  podindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].pod_index;
-	  counter = KP_VIP_COUNTER_FIRST_PACKET;
-	  counter = (podindex0 == 0)?KP_VIP_COUNTER_NO_SERVER:counter;
-
-	  //Dereference previously used
-	  vlib_refcount_add(&kpm->pod_refcount, thread_index,
-			    kp_hash_available_value(sticky_ht, hash0, available_index0), -1);
-	  vlib_refcount_add(&kpm->pod_refcount, thread_index,
-			    podindex0, 1);
-
-	  //Add sticky entry
-	  //Note that when there is no POD configured, an entry is configured anyway.
-	  //But no configured POD is not something that should happen
-	  kp_hash_put(sticky_ht, hash0, podindex0,
-		      vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-		      available_index0, kp_time);
-	}
-      else
-	{
-	  //Could not store new entry in the table
-	  podindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].pod_index;
-	  counter = KP_VIP_COUNTER_UNTRACKED_PACKET;
-	}
-
-      vlib_increment_simple_counter(&kpm->vip_counters[counter],
-				    thread_index,
-				    vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-				    1);
-      //Now let's do NAT
-      {
-	udp_header_t *port0;
-
-	if ( (is_input_v4==1) && (is_nat_v4==1) )  /* NAT44 */
-	  {
-	    ip4_header_t *ip40;
-	    ip40 = vlib_buffer_get_current(p0);
-	    port0 = (udp_header_t *)(ip40 + 1);
-	    ip40->dst_address = kpm->pods[podindex0].address.ip4;
-	    ip40->checksum = ip4_header_checksum (ip40);
-	  }
-	else if ( (is_input_v4==1) && (is_nat_v4==0) )  /* NAT46 */
-	  {
-	    /* TBD */
-	    u16 len0 = 0;
-	    ip4_header_t *ip40;
-	    ip40 = vlib_buffer_get_current(p0);
-	    len0 = clib_net_to_host_u16(ip40->length);
-
-	    vlib_buffer_advance(p0, (-sizeof(ip6_header_t)+sizeof(ip4_header_t)) );
-	    ip6_header_t *ip60;
-	    ip60 = vlib_buffer_get_current(p0);
-	    port0 = (udp_header_t *)(ip60 + 1);
-	    ip60->payload_length = len0 - sizeof(ip4_header_t);
-	    ip60->dst_address = kpm->pods[podindex0].address.ip6;
-	  }
-	else if ( (is_input_v4==0) && (is_nat_v4==0) )  /* NAT66 */
-	  {
-	    ip6_header_t *ip60;
-	    ip60 = vlib_buffer_get_current(p0);
-	    port0 = (udp_header_t *)(ip60 + 1);
-	    ip60->dst_address = kpm->pods[podindex0].address.ip6;
-	  }
-	else /* NAT64 */
-	  {
-	    /* TBD */
-	    u16 len0 = 0;
-	    ip6_header_t *ip60;
-	    ip60 = vlib_buffer_get_current(p0);
-	    len0 = clib_net_to_host_u16(ip60->payload_length);
-
-	    vlib_buffer_advance(p0, (sizeof(ip6_header_t)-sizeof(ip4_header_t)) );
-	    ip4_header_t *ip40;
-	    ip40 = vlib_buffer_get_current(p0);
-	    port0 = (udp_header_t *)(ip40 + 1);
-	    ip40->length = len0 + sizeof(ip4_header_t);
-	    ip40->dst_address = kpm->pods[podindex0].address.ip4;
-	    ip40->checksum = ip4_header_checksum (ip40);
-	  }
-
-	port0->dst_port = vip0->target_port;
-      }
-
-      if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
-	{
-	  kp_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
-	  tr->pod_index = podindex0;
-	  tr->vip_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-	}
-
-      //Enqueue to next
-      //Note that this is going to error if podindex0 == 0
-      vnet_buffer (p0)->ip.adj_index[VLIB_TX] = kpm->pods[podindex0].dpo.dpoi_index;
-      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-				       n_left_to_next, pi0,
-				       kpm->pods[podindex0].dpo.dpoi_next_node);
-    }
-    vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-  }
-
-  return frame->n_vectors;
-}
-
-u8 *
-format_nodeport_kp_trace (u8 * s, va_list * args)
-{
-  kp_main_t *kpm = &kp_main;
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  kp_nodeport_trace_t *t = va_arg (*args, kp_nodeport_trace_t *);
-  if (pool_is_free_index(kpm->vips, t->vip_index)) {
-      s = format(s, "kp vip[%d]: This VIP was freed since capture\n");
-  } else {
-      s = format(s, "kp vip[%d]: %U\n", t->vip_index, format_kp_vip, &kpm->vips[t->vip_index]);
-  }
-
-  s = format(s, "  kp node_port: %d", t->node_port);
-
-  return s;
-}
-static uword
-kp_nodeport_node_fn (vlib_main_t * vm,
-                     vlib_node_runtime_t * node,
-		     vlib_frame_t * frame,
-		     u8 is_input_v4)
-{
-  kp_main_t *kpm = &kp_main;
-  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
-
-  from = vlib_frame_vector_args (frame);
-  n_left_from = frame->n_vectors;
-  next_index = node->cached_next_index;
-
-
-  while (n_left_from > 0)
-  {
-    vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
-    while (n_left_from > 0 && n_left_to_next > 0)
-    {
-      u32 pi0;
-      vlib_buffer_t *p0;
-      udp_header_t * udp_0;
-      uword * entry0;
-      u32 next0 = KP_NODEPORT_NEXT_DROP;
-
-
-      if (PREDICT_TRUE(n_left_from > 1))
-	{
-	  vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
-	  //Prefetch for encap, next
-	  CLIB_PREFETCH (vlib_buffer_get_current(p1) - 64, 64, STORE);
-	}
-
-      if (PREDICT_TRUE(n_left_from > 2))
-	{
-	  vlib_buffer_t *p2;
-	  p2 = vlib_get_buffer(vm, from[2]);
-	  /* prefetch packet header and data */
-	  vlib_prefetch_buffer_header(p2, STORE);
-	  CLIB_PREFETCH (vlib_buffer_get_current(p2), 64, STORE);
-	}
-
-      pi0 = to_next[0] = from[0];
-      from += 1;
-      n_left_from -= 1;
-      to_next += 1;
-      n_left_to_next -= 1;
-
-      p0 = vlib_get_buffer (vm, pi0);
-
-      if (is_input_v4==1)
-	{
-	  ip4_header_t *ip40;
-	  vlib_buffer_advance
-	    (p0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
-	  ip40 = vlib_buffer_get_current(p0);
-	  udp_0 = (udp_header_t *)(ip40 + 1);
-	}
-      else
-	{
-	  ip6_header_t *ip60;
-	  vlib_buffer_advance
-	    (p0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
-	  ip60 = vlib_buffer_get_current(p0);
-	  udp_0 = (udp_header_t *)(ip60 + 1);
-	}
-
-      entry0 = hash_get_mem(kpm->nodeport_by_key, &(udp_0->dst_port));
-
-
-      if (is_input_v4==1)
-	{
-          next0 = KP_NODEPORT_NEXT_IP4_NAT4;
-	}
-      else
-	{
-	  next0 = KP_NODEPORT_NEXT_IP6_NAT6;
-	}
-
-      if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
-	{
-	  kp_nodeport_trace_t *tr = vlib_add_trace (vm, node,
-						    p0, sizeof (*tr));
-	  tr->vip_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-	  tr->node_port = (u32)clib_net_to_host_u16(udp_0->dst_port);
-	}
-
-      //Enqueue to next
-      vnet_buffer(p0)->ip.adj_index[VLIB_TX] = entry0[0];
-      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-				       n_left_to_next, pi0, next0);
-    }
-    vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-  }
-
-  return frame->n_vectors;
-
-}
-
-/**
- * @brief Match NAT4 static mapping.
- *
- * @param sm          NAT main.
- * @param match       Address and port to match.
- * @param mapping     External or local address and port of the matched mapping.
- *
- * @returns 0 if match found otherwise 1.
- */
-int kp_nat4_mapping_match (kp_main_t *kpm,
-                           kp_snat4_key_t match,
-			   kp_snat4_key_t * mapping)
-{
-  clib_bihash_kv_8_8_t kv, value;
-  kp_snat_mapping_t *m;
-  kp_snat4_key_t m_key;
-  clib_bihash_8_8_t *mapping_hash = &kpm->mapping_by_pod;
-
-  m_key.addr = match.addr;
-  m_key.port = match.port;
-  m_key.protocol = match.protocol;
-  m_key.fib_index = match.fib_index;
-
-  kv.key = m_key.as_u64;
-
-  if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
-    {
-      return 1;
-    }
-
-  m = pool_elt_at_index (kpm->snat_mappings, value.value);
-
-  if (m->svr_type == KP_SVR_TYPE_VIP_PORT)
-    {
-      mapping->addr = m->vip.ip4;
-      mapping->port = clib_host_to_net_u16 (m->port);
-      mapping->fib_index = m->fib_index;
-      mapping->protocol = match.protocol;
-    }
-  else if (m->svr_type == KP_SVR_TYPE_NODEIP_PORT)
-    {
-      mapping->addr = m->node_ip.ip4;
-      mapping->port = clib_host_to_net_u16 (m->node_port);
-      mapping->fib_index = m->fib_index;
-      mapping->protocol = match.protocol;
-    }
-
-  return 0;
-}
-
-static uword
-kp_nat4_in2out_node_fn (vlib_main_t * vm,
-                        vlib_node_runtime_t * node,
-                        vlib_frame_t * frame)
-{
-  u32 n_left_from, * from, * to_next;
-  kp_nat4_in2out_next_t next_index;
-  u32 pkts_processed = 0;
-  kp_main_t *kpm = &kp_main;
-  u32 stats_node_index;
-
-  stats_node_index = kp_nat4_in2out_node.index;
-
-  from = vlib_frame_vector_args (frame);
-  n_left_from = frame->n_vectors;
-  next_index = node->cached_next_index;
-
-  while (n_left_from > 0)
-    {
-      u32 n_left_to_next;
-
-      vlib_get_next_frame (vm, node, next_index,
-			   to_next, n_left_to_next);
-
-      while (n_left_from > 0 && n_left_to_next > 0)
-	{
-          u32 bi0;
-	  vlib_buffer_t * b0;
-          u32 next0;
-          u32 sw_if_index0;
-          ip4_header_t * ip0;
-          ip_csum_t sum0;
-          u32 new_addr0, old_addr0;
-          u16 old_port0, new_port0;
-          udp_header_t * udp0;
-          tcp_header_t * tcp0;
-          kp_snat4_key_t key0, sm0;
-          u32 proto0;
-          u32 rx_fib_index0;
-
-          /* speculatively enqueue b0 to the current next frame */
-	  bi0 = from[0];
-	  to_next[0] = bi0;
-	  from += 1;
-	  to_next += 1;
-	  n_left_from -= 1;
-	  n_left_to_next -= 1;
-
-	  b0 = vlib_get_buffer (vm, bi0);
-          next0 = KP_NAT4_IN2OUT_NEXT_LOOKUP;
-
-          ip0 = vlib_buffer_get_current (b0);
-          udp0 = ip4_next_header (ip0);
-          tcp0 = (tcp_header_t *) udp0;
-
-          sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-	  rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
-
-          proto0 = kp_ip_proto_to_nat_proto (ip0->protocol);
-
-          if (PREDICT_FALSE (proto0 == ~0))
-              goto trace0;
-
-          key0.addr = ip0->src_address;
-          key0.protocol = proto0;
-          key0.port = udp0->src_port;
-          key0.fib_index = rx_fib_index0;
-
-          if (kp_nat4_mapping_match (kpm, key0, &sm0))
-            {
-              next0= KP_NAT4_IN2OUT_NEXT_DROP;
-              goto trace0;
-            }
-
-          new_addr0 = sm0.addr.as_u32;
-          new_port0 = sm0.port;
-          vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
-          old_addr0 = ip0->src_address.as_u32;
-          ip0->src_address.as_u32 = new_addr0;
-
-          sum0 = ip0->checksum;
-          sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
-                                 ip4_header_t,
-                                 src_address /* changed member */);
-          ip0->checksum = ip_csum_fold (sum0);
-
-          if (PREDICT_FALSE(new_port0 != udp0->dst_port))
-            {
-              if (PREDICT_TRUE(proto0 == KP_NAT_PROTOCOL_TCP))
-                {
-                  old_port0 = tcp0->src_port;
-                  tcp0->src_port = new_port0;
-
-                  sum0 = tcp0->checksum;
-                  sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
-                                         ip4_header_t,
-                                         dst_address /* changed member */);
-                  sum0 = ip_csum_update (sum0, old_port0, new_port0,
-                                         ip4_header_t /* cheat */,
-                                         length /* changed member */);
-                  tcp0->checksum = ip_csum_fold(sum0);
-                }
-              else
-                {
-                  old_port0 = udp0->src_port;
-                  udp0->src_port = new_port0;
-                  udp0->checksum = 0;
-                }
-            }
-          else
-            {
-              if (PREDICT_TRUE(proto0 == KP_NAT_PROTOCOL_TCP))
-                {
-                  sum0 = tcp0->checksum;
-                  sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
-                                         ip4_header_t,
-                                         dst_address /* changed member */);
-                  tcp0->checksum = ip_csum_fold(sum0);
-                }
-            }
-
-        trace0:
-          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
-                            && (b0->flags & VLIB_BUFFER_IS_TRACED)))
-            {
-              kp_nat_trace_t *t =
-                 vlib_add_trace (vm, node, b0, sizeof (*t));
-              t->rx_sw_if_index = sw_if_index0;
-              t->next_index = next0;
-            }
-
-          pkts_processed += next0 != KP_NAT4_IN2OUT_NEXT_DROP;
-
-          /* verify speculative enqueue, maybe switch current next frame */
-	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
-					   to_next, n_left_to_next,
-					   bi0, next0);
-	}
-
-      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-    }
-
-  vlib_node_increment_counter (vm, stats_node_index,
-                               KP_NAT_IN2OUT_ERROR_IN2OUT_PACKETS,
-                               pkts_processed);
-  return frame->n_vectors;
-}
-
-static uword
-kp6_nat6_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return kp_node_fn(vm, node, frame, 0, 0);
-}
-
-static uword
-kp6_nat4_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return kp_node_fn(vm, node, frame, 0, 1);
-}
-
-static uword
-kp4_nat6_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return kp_node_fn(vm, node, frame, 1, 0);
-}
-
-static uword
-kp4_nat4_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  return kp_node_fn(vm, node, frame, 1, 1);
-}
-
-VLIB_REGISTER_NODE (kp6_nat6_node) =
-{
-  .function = kp6_nat6_node_fn,
-  .name = "kp6-nat6",
-  .vector_size = sizeof (u32),
-  .format_trace = format_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NEXT_DROP] = "error-drop"
-  },
-};
-
-VLIB_REGISTER_NODE (kp6_nat4_node) =
-{
-  .function = kp6_nat4_node_fn,
-  .name = "kp6-nat4",
-  .vector_size = sizeof (u32),
-  .format_trace = format_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NEXT_DROP] = "error-drop"
-  },
-};
-
-VLIB_REGISTER_NODE (kp4_nat6_node) =
-{
-  .function = kp4_nat6_node_fn,
-  .name = "kp4-nat6",
-  .vector_size = sizeof (u32),
-  .format_trace = format_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NEXT_DROP] = "error-drop"
-  },
-};
-
-VLIB_REGISTER_NODE (kp4_nat4_node) =
-{
-  .function = kp4_nat4_node_fn,
-  .name = "kp4-nat4",
-  .vector_size = sizeof (u32),
-  .format_trace = format_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NEXT_DROP] = "error-drop"
-  },
-};
-
-static uword
-kp4_nodeport_node_fn (vlib_main_t * vm,
-                      vlib_node_runtime_t * node,
-		      vlib_frame_t * frame)
-{
-  return kp_nodeport_node_fn(vm, node, frame, 1);
-}
-
-static uword
-kp6_nodeport_node_fn (vlib_main_t * vm,
-                      vlib_node_runtime_t * node,
-		      vlib_frame_t * frame)
-{
-  return kp_nodeport_node_fn(vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (kp4_nodeport_node) =
-{
-  .function = kp4_nodeport_node_fn,
-  .name = "kp4-nodeport",
-  .vector_size = sizeof (u32),
-  .format_trace = format_nodeport_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_NODEPORT_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NODEPORT_NEXT_IP4_NAT4] = "kp4-nat4",
-      [KP_NODEPORT_NEXT_IP4_NAT6] = "kp4-nat6",
-      [KP_NODEPORT_NEXT_IP6_NAT4] = "kp6-nat4",
-      [KP_NODEPORT_NEXT_IP6_NAT6] = "kp6-nat6",
-      [KP_NODEPORT_NEXT_DROP] = "error-drop",
-  },
-};
-
-VLIB_REGISTER_NODE (kp6_nodeport_node) =
-{
-  .function = kp6_nodeport_node_fn,
-  .name = "kp6-nodeport",
-  .vector_size = sizeof (u32),
-  .format_trace = format_nodeport_kp_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_NODEPORT_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NODEPORT_NEXT_IP4_NAT4] = "kp4-nat4",
-      [KP_NODEPORT_NEXT_IP4_NAT6] = "kp4-nat6",
-      [KP_NODEPORT_NEXT_IP6_NAT4] = "kp6-nat4",
-      [KP_NODEPORT_NEXT_IP6_NAT6] = "kp6-nat6",
-      [KP_NODEPORT_NEXT_DROP] = "error-drop",
-  },
-};
-
-VNET_FEATURE_INIT (kp_nat4_in2out_node_fn, static) =
-{
-  .arc_name = "ip4-unicast",
-  .node_name = "kp-nat4-in2out",
-  .runs_before = VNET_FEATURES ("ip4-lookup"),
-};
-
-VLIB_REGISTER_NODE (kp_nat4_in2out_node) =
-{
-  .function = kp_nat4_in2out_node_fn,
-  .name = "kp-nat4-in2out",
-  .vector_size = sizeof (u32),
-  .format_trace = format_kp_nat_trace,
-
-  .n_errors = KP_N_ERROR,
-  .error_strings = kp_error_strings,
-
-  .n_next_nodes = KP_NAT4_IN2OUT_N_NEXT,
-  .next_nodes =
-  {
-      [KP_NAT4_IN2OUT_NEXT_DROP] = "error-drop",
-      [KP_NAT4_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
-  },
-};
diff --git a/src/plugins/kubeproxy/kp_plugin_doc.md b/src/plugins/kubeproxy/kp_plugin_doc.md
deleted file mode 100644
index 0d3cc0d50ca..00000000000
--- a/src/plugins/kubeproxy/kp_plugin_doc.md
+++ /dev/null
@@ -1,105 +0,0 @@
-# Kube-proxy plugin for VPP    {#kp_plugin_doc}
-
-## Overview
-
-This plugin provides kube-proxy data plane on user space,
-which is used to replace linux kernal's kube-proxy based on iptables.
-The idea is largely inspired from VPP LB plugin.
-
-Currently, kube-proxy plugin supports three service types:
-1) Cluster IP plus Port: support any protocols, including TCP, UDP.
-2) Node IP plus Node Port: currently only support UDP.
-3) External Load Balancer.
-
-For Cluster IP plus Port case:
-kube-proxy is configured with a set of Virtual IPs (VIP, which can be
-prefixes), and for each VIP, with a set of POD addresses (PODs).
-
-For a specific session received for a given VIP (or VIP prefix), 
-first packet selects a Pod according to internal load balancing algorithm, 
-then does DNAT operation and sent to chosen Pod.
-At the same time, will create a session entry to store Pod chosen result.
-Following packets for that session will look up session table first, 
-which ensures that a given session will always be routed to the same Pod.
-
-For returned packet from Pod, it will do SNAT operation and sent out.
-
-Please refer to below for details: 
-https://schd.ws/hosted_files/ossna2017/1e/VPP_K8S_GTPU_OSSNA.pdf
-
-
-## Configuration
-
-### Global KP parameters
-
-The kube-proxy needs to be configured with some parameters:
-
-	ku conf [buckets <n>] [timeout <s>]
-
-buckets: the *per-thread* established-connections-table number of buckets.
-
-timeout: the number of seconds a connection will remain in the
-         established-connections-table while no packet for this flow
-         is received.
-
-### Configure VIPs and Ports
-
-    ku vip <prefix>  port <n> target_port <n> node_port <n> \
-      [nat4|nat6)] [new_len <n>] [del]
-
-new_len is the size of the new-connection-table. It should be 1 or 2 orders of
-magnitude bigger than the number of PODs for the VIP in order to ensure a good
-load balancing.
-
-Examples:
-
-    ku vip 90.0.0.0/8 nat44 new_len 2048
-    ku vip 2003::/16 nat66 new_len 2048
-    
-### Configure PODs (for each VIP)
-
-    ku pod <vip-prefix> [<address> [<address> [...]]] [del]
-
-You can add (or delete) as many PODs at a time (for a single VIP).
-
-Examples:
-
-    ku pod 90.0.0.0/8 10.0.0.1
-    ku pod 2002::/16 2001::2 2001::3 2001::4
-
-### Configure SNAT
-
-    ku set interface nat4 in <intfc> [del]
-
-Set SNAT feature in a specific interface.
-
-
-## Monitoring
-
-The plugin provides quite a bunch of counters and information.
-
-    show ku
-    show ku vip verbose
-    show node counters
-
-
-## Design notes
-
-### Multi-Threading
-
-This implementation implement parallelism by using 
-one established-connections table per thread. This is equivalent to assuming
-that RSS will make a job similar to ECMP, and is pretty useful as threads don't
-need to get a lock in order to write in the table.
-
-### Hash Table
-
-A kube-proxy requires an efficient read and write Hash table. The Hash table
-used by ip6-forward is very read-efficient, but not so much for writing. In
-addition, it is not a big deal if writing into the Hash table fails.
-
-The plugin therefore uses a very specific Hash table.
-	- Fixed (and power of 2) number of buckets (configured at runtime)
-	- Fixed (and power of 2) elements per buckets (configured at compilation time)
-
-
diff --git a/src/plugins/kubeproxy/kp_test.c b/src/plugins/kubeproxy/kp_test.c
deleted file mode 100644
index 895a6adedaa..00000000000
--- a/src/plugins/kubeproxy/kp_test.c
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
- * Copyright (c) 2016 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "POD IS" BPODIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <vat/vat.h>
-#include <vlibapi/api.h>
-#include <vlibmemory/api.h>
-#include <vppinfra/error.h>
-#include <kubeproxy/kp.h>
-
-#define __plugin_msg_base kp_test_main.msg_id_base
-#include <vlibapi/vat_helper_macros.h>
-
-//TODO: Move that to vat/plugin_api.c
-//////////////////////////
-uword unformat_ip46_address (unformat_input_t * input, va_list * args)
-{
-  ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
-  ip46_type_t type = va_arg (*args, ip46_type_t);
-  if ((type != IP46_TYPE_IP6) &&
-      unformat(input, "%U", unformat_ip4_address, &ip46->ip4)) {
-    ip46_address_mask_ip4(ip46);
-    return 1;
-  } else if ((type != IP46_TYPE_IP4) &&
-      unformat(input, "%U", unformat_ip6_address, &ip46->ip6)) {
-    return 1;
-  }
-  return 0;
-}
-uword unformat_ip46_prefix (unformat_input_t * input, va_list * args)
-{
-  ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
-  u8 *len = va_arg (*args, u8 *);
-  ip46_type_t type = va_arg (*args, ip46_type_t);
-
-  u32 l;
-  if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) {
-    if (l > 32)
-      return 0;
-    *len = l + 96;
-    ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0;
-  } else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) {
-    if (l > 128)
-      return 0;
-    *len = l;
-  } else {
-    return 0;
-  }
-  return 1;
-}
-/////////////////////////
-
-#define vl_msg_id(n,h) n,
-typedef enum {
-#include <kubeproxy/kp.api.h>
-    /* We'll want to know how many messages IDs we need... */
-    VL_MSG_FIRST_AVAILABLE,
-} vl_msg_id_t;
-#undef vl_msg_id
-
-/* define message structures */
-#define vl_typedefs
-#include <kubeproxy/kp.api.h>
-#undef vl_typedefs
-
-/* declare message handlers for each api */
-
-#define vl_endianfun             /* define message structures */
-#include <kubeproxy/kp.api.h>
-#undef vl_endianfun
-
-/* instantiate all the print functions we know about */
-#define vl_print(handle, ...)
-#define vl_printfun
-#include <kubeproxy/kp.api.h>
-#undef vl_printfun
-
-/* Get the API version number. */
-#define vl_api_version(n,v) static u32 api_version=(v);
-#include <kubeproxy/kp.api.h>
-#undef vl_api_version
-
-typedef struct {
-    /* API message ID base */
-    u16 msg_id_base;
-    vat_main_t *vat_main;
-} kp_test_main_t;
-
-kp_test_main_t kp_test_main;
-
-#define foreach_standard_reply_retval_handler   \
-_(kp_conf_reply)                 \
-_(kp_add_del_vip_reply)          \
-_(kp_add_del_pod_reply)
-
-#define _(n)                                            \
-    static void vl_api_##n##_t_handler                  \
-    (vl_api_##n##_t * mp)                               \
-    {                                                   \
-        vat_main_t * vam = kp_test_main.vat_main;   \
-        i32 retval = ntohl(mp->retval);                 \
-        if (vam->async_mode) {                          \
-            vam->async_errors += (retval < 0);          \
-        } else {                                        \
-            vam->retval = retval;                       \
-            vam->result_ready = 1;                      \
-        }                                               \
-    }
-foreach_standard_reply_retval_handler;
-#undef _
-
-/*
- * Table of message reply handlers, must include boilerplate handlers
- * we just generated
- */
-#define foreach_vpe_api_reply_msg                               \
-  _(KP_CONF_REPLY, kp_conf_reply)                                     \
-  _(KP_ADD_DEL_VIP_REPLY, kp_add_del_vip_reply)                       \
-  _(KP_ADD_DEL_POD_REPLY, kp_add_del_pod_reply)
-
-static int api_kp_conf (vat_main_t * vam)
-{
-  unformat_input_t *i = vam->input;
-  vl_api_kp_conf_t mps, *mp;
-  int ret;
-
-  if (!unformat(i, "%u %u",
-               &mps.sticky_buckets_per_core,
-               &mps.flow_timeout)) {
-    errmsg ("invalid arguments\n");
-    return -99;
-  }
-
-  M(KP_CONF, mp);
-  S(mp);
-  W (ret);
-  return ret;
-}
-
-static int api_kp_add_del_vip (vat_main_t * vam)
-{
-  unformat_input_t * i = vam->input;
-  vl_api_kp_add_del_vip_t mps, *mp;
-  int ret;
-  mps.is_del = 0;
-  mps.is_nat4 = 0;
-
-  if (!unformat(i, "%U",
-                unformat_ip46_prefix, mps.ip_prefix, &mps.prefix_length, IP46_TYPE_ANY)) {
-    errmsg ("invalid prefix\n");
-    return -99;
-  }
-
-  if (unformat(i, "nat4")) {
-    mps.is_nat4 = 1;
-  } else if (unformat(i, "nat6")) {
-    mps.is_nat4 = 0;
-  } else {
-    errmsg ("no nat\n");
-    return -99;
-  }
-
-  if (!unformat(i, "%d", &mps.new_flows_table_length)) {
-    errmsg ("no table lentgh\n");
-    return -99;
-  }
-
-  if (unformat(i, "del")) {
-    mps.is_del = 1;
-  }
-
-  M(KP_ADD_DEL_VIP, mp);
-  S(mp);
-  W (ret);
-  return ret;
-}
-
-static int api_kp_add_del_pod (vat_main_t * vam)
-{
-  unformat_input_t * i = vam->input;
-  vl_api_kp_add_del_pod_t mps, *mp;
-  int ret;
-  mps.is_del = 0;
-
-  if (!unformat(i, "%U %U",
-                unformat_ip46_prefix, mps.vip_ip_prefix, &mps.vip_prefix_length, IP46_TYPE_ANY,
-                unformat_ip46_address, mps.pod_address)) {
-    errmsg ("invalid prefix or address\n");
-    return -99;
-  }
-
-  if (unformat(i, "del")) {
-    mps.is_del = 1;
-  }
-
-  M(KP_ADD_DEL_POD, mp);
-  S(mp);
-  W (ret);
-  return ret;
-}
-
-/*
- * List of messages that the api test plugin sends,
- * and that the data plane plugin processes
- */
-#define foreach_vpe_api_msg                             \
-_(kp_conf, "<sticky_buckets_per_core> <flow_timeout>") \
-_(kp_add_del_vip, "<ip-prefix> <port> <target_port> <node_port> " \
-                  "[nat4|nat6] <new_table_len> [del]") \
-_(kp_add_del_pod, "<vip-ip-prefix> <address> [del]")
-
-static void 
-kp_vat_api_hookup (vat_main_t *vam)
-{
-  kp_test_main_t * kptm = &kp_test_main;
-  /* Hook up handlers for replies from the data plane plug-in */
-#define _(N,n)                                                  \
-  vl_msg_api_set_handlers((VL_API_##N + kptm->msg_id_base),       \
-                          #n,                                   \
-                          vl_api_##n##_t_handler,               \
-                          vl_noop_handler,                      \
-                          vl_api_##n##_t_endian,                \
-                          vl_api_##n##_t_print,                 \
-                          sizeof(vl_api_##n##_t), 1);
-  foreach_vpe_api_reply_msg;
-#undef _
-
-  /* API messages we can send */
-#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n);
-  foreach_vpe_api_msg;
-#undef _
-
-  /* Help strings */
-#define _(n,h) hash_set_mem (vam->help_by_name, #n, h);
-  foreach_vpe_api_msg;
-#undef _
-}
-
-clib_error_t * vat_plugin_register (vat_main_t *vam)
-{
-  kp_test_main_t * kptm = &kp_test_main;
-
-  u8 * name;
-
-  kptm->vat_main = vam;
-
-  /* Ask the vpp engine for the first assigned message-id */
-  name = format (0, "kp_%08x%c", api_version, 0);
-  kptm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);
-
-  if (kptm->msg_id_base != (u16) ~0)
-    kp_vat_api_hookup (vam);
-
-  vec_free(name);
-
-  return 0;
-}
diff --git a/src/plugins/kubeproxy/kphash.h b/src/plugins/kubeproxy/kphash.h
deleted file mode 100644
index 2957aeb2a53..00000000000
--- a/src/plugins/kubeproxy/kphash.h
+++ /dev/null
@@ -1,216 +0,0 @@
-/*
- * Copyright (c) 2017 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * vppinfra already includes tons of different hash tables.
- * MagLev flow table is a bit different. It has to be very efficient
- * for both writing and reading operations. But it does not need to
- * be 100% reliable (write can fail). It also needs to recycle
- * old entries in a lazy way.
- *
- * This hash table is the most dummy hash table you can do.
- * Fixed total size, fixed bucket size.
- * Advantage is that it could be very efficient (maybe).
- *
- */
-
-#ifndef KP_PLUGIN_KP_KPHASH_H_
-#define KP_PLUGIN_KP_KPHASH_H_
-
-#include <vnet/vnet.h>
-#include <vppinfra/xxhash.h>
-#include <vppinfra/crc32.h>
-
-/*
- * @brief Number of entries per bucket.
- */
-#define KPHASH_ENTRY_PER_BUCKET 4
-
-#define KP_HASH_DO_NOT_USE_SSE_BUCKETS 0
-
-/**
- * 32 bits integer comparison for running values.
- * 1 > 0 is true. But 1 > 0xffffffff also is.
- */
-#define clib_u32_loop_gt(a, b) (((u32)(a)) - ((u32)(b)) < 0x7fffffff)
-
-/*
- * @brief One bucket contains 4 entries.
- * Each bucket takes one 64B cache line in memory.
- */
-typedef struct {
-  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-  u32 hash[KPHASH_ENTRY_PER_BUCKET];
-  u32 timeout[KPHASH_ENTRY_PER_BUCKET];
-  u32 vip[KPHASH_ENTRY_PER_BUCKET];
-  u32 value[KPHASH_ENTRY_PER_BUCKET];
-} kp_hash_bucket_t;
-
-typedef struct {
-  u32 buckets_mask;
-  u32 timeout;
-  kp_hash_bucket_t buckets[];
-} kp_hash_t;
-
-#define kp_hash_nbuckets(h) (((h)->buckets_mask) + 1)
-#define kp_hash_size(h) ((h)->buckets_mask + KPHASH_ENTRY_PER_BUCKET)
-
-#define kp_hash_foreach_bucket(h, bucket) \
-  for (bucket = (h)->buckets; \
-	bucket < (h)->buckets + kp_hash_nbuckets(h); \
-	bucket++)
-
-#define kp_hash_foreach_entry(h, bucket, i) \
-    kp_hash_foreach_bucket(h, bucket) \
-      for (i = 0; i < KPHASH_ENTRY_PER_BUCKET; i++)
-
-#define kp_hash_foreach_valid_entry(h, bucket, i, now) \
-    kp_hash_foreach_entry(h, bucket, i) \
-       if (!clib_u32_loop_gt((now), bucket->timeout[i]))
-
-static_always_inline
-kp_hash_t *kp_hash_alloc(u32 buckets, u32 timeout)
-{
-  if (!is_pow2(buckets))
-    return NULL;
-
-  // Allocate 1 more bucket for prefetch
-  u32 size = ((u64)&((kp_hash_t *)(0))->buckets[0]) +
-      sizeof(kp_hash_bucket_t) * (buckets + 1);
-  u8 *mem = 0;
-  kp_hash_t *h;
-  vec_alloc_aligned(mem, size, CLIB_CACHE_LINE_BYTES);
-  h = (kp_hash_t *)mem;
-  h->buckets_mask = (buckets - 1);
-  h->timeout = timeout;
-  return h;
-}
-
-static_always_inline
-void kp_hash_free(kp_hash_t *h)
-{
-  u8 *mem = (u8 *)h;
-  vec_free(mem);
-}
-
-static_always_inline
-u32 kp_hash_hash(u64 k0, u64 k1, u64 k2, u64 k3, u64 k4)
-{
-#ifdef clib_crc32c_uses_intrinsics
-  u64 key[5];
-  key[0] = k0;
-  key[1] = k1;
-  key[2] = k2;
-  key[3] = k3;
-  key[4] = k4;
-  return clib_crc32c ((u8 *) key, 40);
-#else
-  u64 tmp = k0 ^ k1 ^ k2 ^ k3 ^ k4;
-  return (u32)clib_xxhash (tmp);
-#endif
-}
-
-static_always_inline
-void kp_hash_prefetch_bucket(kp_hash_t *ht, u32 hash)
-{
-  kp_hash_bucket_t *bucket = &ht->buckets[hash & ht->buckets_mask];
-  CLIB_PREFETCH(bucket, sizeof(*bucket), READ);
-}
-
-static_always_inline
-void kp_hash_get(kp_hash_t *ht, u32 hash, u32 vip, u32 time_now,
-		 u32 *available_index, u32 *found_value)
-{
-  kp_hash_bucket_t *bucket = &ht->buckets[hash & ht->buckets_mask];
-  *found_value = ~0;
-  *available_index = ~0;
-#if __SSE4_2__ && KP_HASH_DO_NOT_USE_SSE_BUCKETS == 0
-  u32 bitmask, found_index;
-  __m128i mask;
-
-  // mask[*] = timeout[*] > now
-  mask = _mm_cmpgt_epi32(_mm_loadu_si128 ((__m128i *) bucket->timeout),
-			 _mm_set1_epi32 (time_now));
-  // bitmask[*] = now <= timeout[*/4]
-  bitmask = (~_mm_movemask_epi8(mask)) & 0xffff;
-  // Get first index with now <= timeout[*], if any.
-  *available_index = (bitmask)?__builtin_ctz(bitmask)/4:*available_index;
-
-  // mask[*] = (timeout[*] > now) && (hash[*] == hash)
-  mask = _mm_and_si128(mask,
-		       _mm_cmpeq_epi32(
-			   _mm_loadu_si128 ((__m128i *) bucket->hash),
-			   _mm_set1_epi32 (hash)));
-
-  // Load the array of vip values
-  // mask[*] = (timeout[*] > now) && (hash[*] == hash) && (vip[*] == vip)
-  mask = _mm_and_si128(mask,
-		       _mm_cmpeq_epi32(
-			   _mm_loadu_si128 ((__m128i *) bucket->vip),
-			   _mm_set1_epi32 (vip)));
-
-  // mask[*] = (timeout[*x4] > now) && (hash[*x4] == hash) && (vip[*x4] == vip)
-  bitmask = _mm_movemask_epi8(mask);
-  // Get first index, if any
-  found_index = (bitmask)?__builtin_ctzll(bitmask)/4:0;
-  ASSERT(found_index < 4);
-  *found_value = (bitmask)?bucket->value[found_index]:*found_value;
-  bucket->timeout[found_index] =
-      (bitmask)?time_now + ht->timeout:bucket->timeout[found_index];
-#else
-  u32 i;
-  for (i = 0; i < KPHASH_ENTRY_PER_BUCKET; i++) {
-      u8 cmp = (bucket->hash[i] == hash && bucket->vip[i] == vip);
-      u8 timeouted = clib_u32_loop_gt(time_now, bucket->timeout[i]);
-      *found_value = (cmp || timeouted)?*found_value:bucket->value[i];
-      bucket->timeout[i] = (cmp || timeouted)?time_now + ht->timeout:bucket->timeout[i];
-      *available_index = (timeouted && (*available_index == ~0))?i:*available_index;
-
-      if (!cmp)
-	return;
-  }
-#endif
-}
-
-static_always_inline
-u32 kp_hash_available_value(kp_hash_t *h, u32 hash, u32 available_index)
-{
-  return h->buckets[hash & h->buckets_mask].value[available_index];
-}
-
-static_always_inline
-void kp_hash_put(kp_hash_t *h, u32 hash, u32 value, u32 vip,
-		 u32 available_index, u32 time_now)
-{
-  kp_hash_bucket_t *bucket = &h->buckets[hash & h->buckets_mask];
-  bucket->hash[available_index] = hash;
-  bucket->value[available_index] = value;
-  bucket->timeout[available_index] = time_now + h->timeout;
-  bucket->vip[available_index] = vip;
-}
-
-static_always_inline
-u32 kp_hash_elts(kp_hash_t *h, u32 time_now)
-{
-  u32 tot = 0;
-  kp_hash_bucket_t *bucket;
-  u32 i;
-  kp_hash_foreach_valid_entry(h, bucket, i, time_now) {
-    tot++;
-  }
-  return tot;
-}
-
-#endif /* KP_PLUGIN_KP_KPHASH_H_ */
diff --git a/src/plugins/lb/api.c b/src/plugins/lb/api.c
index 28af6daa421..beec4ae5876 100644
--- a/src/plugins/lb/api.c
+++ b/src/plugins/lb/api.c
@@ -107,33 +107,52 @@ vl_api_lb_add_del_vip_t_handler
   lb_main_t *lbm = &lb_main;
   vl_api_lb_conf_reply_t * rmp;
   int rv = 0;
-  ip46_address_t prefix;
-  memcpy(&prefix.ip6, mp->ip_prefix, sizeof(prefix.ip6));
+  lb_vip_add_args_t args;
+
+  memcpy (&(args.prefix.ip6), mp->ip_prefix, sizeof(args.prefix.ip6));
 
   if (mp->is_del) {
     u32 vip_index;
-    if (!(rv = lb_vip_find_index(&prefix, mp->prefix_length, &vip_index)))
+    if (!(rv = lb_vip_find_index(&(args.prefix), mp->prefix_length, &vip_index)))
       rv = lb_vip_del(vip_index);
   } else {
     u32 vip_index;
     lb_vip_type_t type = 0;
 
-    if (ip46_prefix_is_ip4(&prefix, mp->prefix_length)) {
+    if (ip46_prefix_is_ip4(&(args.prefix), mp->prefix_length)) {
         if (mp->encap == LB_ENCAP_TYPE_GRE4)
-  	type = LB_VIP_TYPE_IP4_GRE4;
+            type = LB_VIP_TYPE_IP4_GRE4;
         else if (mp->encap == LB_ENCAP_TYPE_GRE6)
-  	type = LB_VIP_TYPE_IP4_GRE6;
+            type = LB_VIP_TYPE_IP4_GRE6;
         else if (mp->encap == LB_ENCAP_TYPE_L3DSR)
-  	type = LB_VIP_TYPE_IP4_L3DSR;
+            type = LB_VIP_TYPE_IP4_L3DSR;
+        else if (mp->encap == LB_ENCAP_TYPE_NAT4)
+            type = LB_VIP_TYPE_IP4_NAT4;
     } else {
         if (mp->encap == LB_ENCAP_TYPE_GRE4)
-  	type = LB_VIP_TYPE_IP6_GRE4;
+            type = LB_VIP_TYPE_IP6_GRE4;
         else if (mp->encap == LB_ENCAP_TYPE_GRE6)
-  	type = LB_VIP_TYPE_IP6_GRE6;
+            type = LB_VIP_TYPE_IP6_GRE6;
+        else if (mp->encap == LB_ENCAP_TYPE_NAT6)
+            type = LB_VIP_TYPE_IP6_NAT6;
     }
 
-    rv = lb_vip_add(&prefix, mp->prefix_length, type, mp->dscp,
-                    mp->new_flows_table_length, &vip_index);
+    args.plen = mp->prefix_length;
+    args.type = type;
+    args.new_length = mp->new_flows_table_length;
+
+    if (mp->encap == LB_ENCAP_TYPE_L3DSR) {
+        args.encap_args.dscp = (u8)(mp->dscp & 0x3F);
+      }
+    else if ((mp->encap == LB_ENCAP_TYPE_NAT4)
+            ||(mp->encap == LB_ENCAP_TYPE_NAT6)) {
+        args.encap_args.srv_type = mp->type;
+        args.encap_args.port = ntohs(mp->port);
+        args.encap_args.target_port = ntohs(mp->target_port);
+        args.encap_args.node_port = ntohs(mp->node_port);
+      }
+
+    rv = lb_vip_add(args, &vip_index);
   }
  REPLY_MACRO (VL_API_LB_CONF_REPLY);
 }
@@ -146,8 +165,26 @@ static void *vl_api_lb_add_del_vip_t_print
   s = format (s, "%U ", format_ip46_prefix,
               (ip46_address_t *)mp->ip_prefix, mp->prefix_length, IP46_TYPE_ANY);
 
-  s = format (s, "%s ", (mp->encap==LB_ENCAP_TYPE_GRE4)?
-              "gre4":(mp->encap==LB_ENCAP_TYPE_GRE6)?"gre6":"l3dsr");
+  s = format (s, "%s ", (mp->encap == LB_ENCAP_TYPE_GRE4)? "gre4"
+              : (mp->encap == LB_ENCAP_TYPE_GRE6)? "gre6"
+              : (mp->encap == LB_ENCAP_TYPE_NAT4)? "nat4"
+              : (mp->encap == LB_ENCAP_TYPE_NAT6)? "nat6"
+              : "l3dsr");
+
+  if (mp->encap==LB_ENCAP_TYPE_L3DSR)
+    {
+      s = format (s, "dscp %u ", mp->dscp);
+    }
+
+  if ((mp->encap==LB_ENCAP_TYPE_NAT4)
+      || (mp->encap==LB_ENCAP_TYPE_NAT6))
+    {
+      s = format (s, "type %u ", mp->type);
+      s = format (s, "port %u ", mp->port);
+      s = format (s, "target_port %u ", mp->target_port);
+      s = format (s, "node_port %u ", mp->node_port);
+    }
+
   s = format (s, "%u ", mp->new_flows_table_length);
   s = format (s, "%s ", mp->is_del?"del":"add");
   FINISH;
@@ -161,14 +198,23 @@ vl_api_lb_add_del_as_t_handler
   vl_api_lb_conf_reply_t * rmp;
   int rv = 0;
   u32 vip_index;
-  if ((rv = lb_vip_find_index((ip46_address_t *)mp->vip_ip_prefix,
-                              mp->vip_prefix_length, &vip_index)))
+  ip46_address_t vip_ip_prefix;
+
+  memcpy(&vip_ip_prefix.ip6, mp->vip_ip_prefix,
+         sizeof(vip_ip_prefix.ip6));
+
+  ip46_address_t as_address;
+
+  memcpy(&as_address.ip6, mp->as_address,
+         sizeof(as_address.ip6));
+
+  if ((rv = lb_vip_find_index(&vip_ip_prefix, mp->vip_prefix_length, &vip_index)))
     goto done;
 
   if (mp->is_del)
-    rv = lb_vip_del_ass(vip_index, (ip46_address_t *)mp->as_address, 1);
+    rv = lb_vip_del_ass(vip_index, &as_address, 1);
   else
-    rv = lb_vip_add_ass(vip_index, (ip46_address_t *)mp->as_address, 1);
+    rv = lb_vip_add_ass(vip_index, &as_address, 1);
 
 done:
  REPLY_MACRO (VL_API_LB_CONF_REPLY);
diff --git a/src/plugins/lb/cli.c b/src/plugins/lb/cli.c
index b29605af984..2bd06b98b6a 100644
--- a/src/plugins/lb/cli.c
+++ b/src/plugins/lb/cli.c
@@ -21,20 +21,24 @@ lb_vip_command_fn (vlib_main_t * vm,
               unformat_input_t * input, vlib_cli_command_t * cmd)
 {
   unformat_input_t _line_input, *line_input = &_line_input;
-  ip46_address_t prefix;
-  u8 plen;
-  u32 new_len = 1024;
+  lb_vip_add_args_t args;
   u8 del = 0;
   int ret;
   u32 encap = 0;
   u32 dscp = ~0;
-  lb_vip_type_t type = 0;
+  u32 srv_type = LB_SRV_TYPE_CLUSTERIP;
+  u32 port = 0;
+  u32 target_port = 0;
+  u32 node_port = 0;
   clib_error_t *error = 0;
 
+  args.new_length = 1024;
+
   if (!unformat_user (input, unformat_line_input, line_input))
     return 0;
 
-  if (!unformat(line_input, "%U", unformat_ip46_prefix, &prefix, &plen, IP46_TYPE_ANY)) {
+  if (!unformat(line_input, "%U", unformat_ip46_prefix, &(args.prefix),
+                &(args.plen), IP46_TYPE_ANY, &(args.plen))) {
     error = clib_error_return (0, "invalid vip prefix: '%U'",
                                format_unformat_error, line_input);
     goto done;
@@ -42,7 +46,7 @@ lb_vip_command_fn (vlib_main_t * vm,
 
   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
   {
-    if (unformat(line_input, "new_len %d", &new_len))
+    if (unformat(line_input, "new_len %d", &(args.new_length)))
       ;
     else if (unformat(line_input, "del"))
       del = 1;
@@ -52,8 +56,22 @@ lb_vip_command_fn (vlib_main_t * vm,
       encap = LB_ENCAP_TYPE_GRE6;
     else if (unformat(line_input, "encap l3dsr"))
       encap = LB_ENCAP_TYPE_L3DSR;
+    else if (unformat(line_input, "encap nat4"))
+      encap = LB_ENCAP_TYPE_NAT4;
+    else if (unformat(line_input, "encap nat6"))
+      encap = LB_ENCAP_TYPE_NAT6;
     else if (unformat(line_input, "dscp %d", &dscp))
       ;
+    else if (unformat(line_input, "type clusterip"))
+      srv_type = LB_SRV_TYPE_CLUSTERIP;
+    else if (unformat(line_input, "type nodeport"))
+      srv_type = LB_SRV_TYPE_NODEPORT;
+    else if (unformat(line_input, "port %d", &port))
+      ;
+    else if (unformat(line_input, "target_port %d", &target_port))
+      ;
+    else if (unformat(line_input, "node_port %d", &node_port))
+      ;
     else {
       error = clib_error_return (0, "parse error: '%U'",
                                 format_unformat_error, line_input);
@@ -61,46 +79,75 @@ lb_vip_command_fn (vlib_main_t * vm,
     }
   }
 
-  if ((encap != LB_ENCAP_TYPE_L3DSR) && (dscp != ~0) )
+  if ((encap != LB_ENCAP_TYPE_L3DSR) && (dscp != ~0))
     {
-      error = clib_error_return (0, "lb_vip_add error: "
-	        "should not configure dscp for none L3DSR.");
+      error = clib_error_return(0, "lb_vip_add error: "
+                                "should not configure dscp for none L3DSR.");
       goto done;
     }
 
-  if ((encap == LB_ENCAP_TYPE_L3DSR) && (dscp >= 64 ) )
+  if ((encap == LB_ENCAP_TYPE_L3DSR) && (dscp >= 64))
     {
-      error = clib_error_return (0, "lb_vip_add error: "
-	        "dscp for L3DSR should be less than 64.");
+      error = clib_error_return(0, "lb_vip_add error: "
+                                "dscp for L3DSR should be less than 64.");
       goto done;
     }
 
-  if (ip46_prefix_is_ip4(&prefix, plen)) {
+  if (ip46_prefix_is_ip4(&(args.prefix), (args.plen)))
+    {
       if (encap == LB_ENCAP_TYPE_GRE4)
-	type = LB_VIP_TYPE_IP4_GRE4;
+        args.type = LB_VIP_TYPE_IP4_GRE4;
       else if (encap == LB_ENCAP_TYPE_GRE6)
-	type = LB_VIP_TYPE_IP4_GRE6;
+        args.type = LB_VIP_TYPE_IP4_GRE6;
       else if (encap == LB_ENCAP_TYPE_L3DSR)
-	type = LB_VIP_TYPE_IP4_L3DSR;
-  } else {
+        args.type = LB_VIP_TYPE_IP4_L3DSR;
+      else if (encap == LB_ENCAP_TYPE_NAT4)
+        args.type = LB_VIP_TYPE_IP4_NAT4;
+      else if (encap == LB_ENCAP_TYPE_NAT6)
+        {
+          error = clib_error_return(0, "currently does not support NAT46");
+          goto done;
+        }
+    }
+  else
+    {
       if (encap == LB_ENCAP_TYPE_GRE4)
-	type = LB_VIP_TYPE_IP6_GRE4;
+        args.type = LB_VIP_TYPE_IP6_GRE4;
       else if (encap == LB_ENCAP_TYPE_GRE6)
-	type = LB_VIP_TYPE_IP6_GRE6;
-  }
+        args.type = LB_VIP_TYPE_IP6_GRE6;
+      else if (encap == LB_ENCAP_TYPE_NAT6)
+        args.type = LB_VIP_TYPE_IP6_NAT6;
+      else if (encap == LB_ENCAP_TYPE_NAT4)
+        {
+          error = clib_error_return(0, "currently does not support NAT64");
+          goto done;
+        }
+    }
 
   lb_garbage_collection();
 
   u32 index;
   if (!del) {
-    if ((ret = lb_vip_add(&prefix, plen, type, (u8)(dscp & 0x3F), new_len, &index))) {
+    if (encap == LB_ENCAP_TYPE_L3DSR) {
+        args.encap_args.dscp = (u8)(dscp & 0x3F);
+      }
+      else if ((encap == LB_ENCAP_TYPE_NAT4)
+               || (encap == LB_ENCAP_TYPE_NAT6))
+        {
+          args.encap_args.srv_type = (u8) srv_type;
+          args.encap_args.port = (u16) port;
+          args.encap_args.target_port = (u16) target_port;
+          args.encap_args.node_port = (u16) node_port;
+        }
+
+    if ((ret = lb_vip_add(args, &index))) {
       error = clib_error_return (0, "lb_vip_add error %d", ret);
       goto done;
     } else {
       vlib_cli_output(vm, "lb_vip_add ok %d", index);
     }
   } else {
-    if ((ret = lb_vip_find_index(&prefix, plen, &index))) {
+    if ((ret = lb_vip_find_index(&(args.prefix), args.plen, &index))) {
       error = clib_error_return (0, "lb_vip_find_index error %d", ret);
       goto done;
     } else if ((ret = lb_vip_del(index))) {
@@ -118,7 +165,10 @@ done:
 VLIB_CLI_COMMAND (lb_vip_command, static) =
 {
   .path = "lb vip",
-  .short_help = "lb vip <prefix> [encap (gre6|gre4|l3dsr)] [dscp <n>] [new_len <n>] [del]",
+  .short_help = "lb vip <prefix> [encap (gre6|gre4|l3dsr|nat4|nat6)] "
+      "[dscp <n>] "
+      "[type (nodeport|clusterip) port <n> target_port <n> node_port <n>] "
+      "[new_len <n>] [del]",
   .function = lb_vip_command_fn,
 };
 
@@ -301,6 +351,99 @@ VLIB_CLI_COMMAND (lb_show_vips_command, static) =
 };
 
 static clib_error_t *
+lb_set_interface_nat_command_fn (vlib_main_t * vm,
+                                 unformat_input_t * input,
+                                 vlib_cli_command_t * cmd,
+                                 u8 is_nat6)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  vnet_main_t * vnm = vnet_get_main();
+  clib_error_t * error = 0;
+  u32 * sw_if_index = 0;
+  u32 * inside_sw_if_indices = 0;
+  int is_del = 0;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "in %U", unformat_vnet_sw_interface,
+                    vnm, sw_if_index))
+        vec_add1 (inside_sw_if_indices, *sw_if_index);
+      else if (unformat (line_input, "del"))
+        is_del = 1;
+      else
+        {
+          error = clib_error_return (0, "unknown input '%U'",
+            format_unformat_error, line_input);
+          goto done;
+        }
+    }
+
+    vec_foreach (sw_if_index, inside_sw_if_indices)
+    {
+      if (!is_nat6)
+        {
+          if (lb_nat4_interface_add_del (*sw_if_index, is_del))
+            {
+              error = clib_error_return(
+                  0, "%s %U failed", is_del ? "del" : "add",
+                  format_vnet_sw_interface_name, vnm,
+                  vnet_get_sw_interface (vnm, *sw_if_index));
+              goto done;
+            }
+        }
+      else
+        {
+          if (lb_nat6_interface_add_del (*sw_if_index, is_del))
+            {
+              error = clib_error_return(
+                  0, "%s %U failed", is_del ? "del" : "add",
+                  format_vnet_sw_interface_name, vnm,
+                  vnet_get_sw_interface (vnm, *sw_if_index));
+              goto done;
+            }
+        }
+    }
+
+done:
+  unformat_free (line_input);
+  vec_free (inside_sw_if_indices);
+
+  return error;
+}
+
+static clib_error_t *
+lb_set_interface_nat4_command_fn (vlib_main_t * vm,
+                                  unformat_input_t * input,
+                                  vlib_cli_command_t * cmd)
+{
+  return lb_set_interface_nat_command_fn(vm, input, cmd, 0);
+}
+
+VLIB_CLI_COMMAND (lb_set_interface_nat4_command, static) = {
+  .path = "lb set interface nat4",
+  .function = lb_set_interface_nat4_command_fn,
+  .short_help = "lb set interface nat4 in <intfc> [del]",
+};
+
+static clib_error_t *
+lb_set_interface_nat6_command_fn (vlib_main_t * vm,
+                                  unformat_input_t * input,
+                                  vlib_cli_command_t * cmd)
+{
+  return lb_set_interface_nat_command_fn(vm, input, cmd, 1);
+}
+
+VLIB_CLI_COMMAND (lb_set_interface_nat6_command, static) = {
+  .path = "lb set interface nat6",
+  .function = lb_set_interface_nat6_command_fn,
+  .short_help = "lb set interface nat6 in <intfc> [del]",
+};
+
+static clib_error_t *
 lb_flowtable_flush_command_fn (vlib_main_t * vm,
               unformat_input_t * input, vlib_cli_command_t * cmd)
 {
diff --git a/src/plugins/lb/lb.api b/src/plugins/lb/lb.api
index 101cee88ded..a9f05f253c5 100644
--- a/src/plugins/lb/lb.api
+++ b/src/plugins/lb/lb.api
@@ -3,9 +3,9 @@ option version = "1.0.0";
 /** \brief Configure Load-Balancer global parameters
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param ip4_src_address - IPv4 address to be used as source for IPv4 GRE traffic.
-    @param ip6_src_address - IPv6 address to be used as source for IPv6 GRE traffic.
-    @param n_sticky_buckets - Number of buckets *per worker thread* in the 
+    @param ip4_src_address - IPv4 address to be used as source for IPv4 traffic(applicable in GRE4/GRE6/NAT4/NAT6 mode only).
+    @param ip6_src_address - IPv6 address to be used as source for IPv6 traffic(applicable in GRE4/GRE6/NAT4/NAT6 mode only).
+    @param sticky_buckets_per_core - Number of buckets *per worker thread* in the
            established flow table (must be power of 2).
     @param flow_timeout - Time in seconds after which, if no packet is received
            for a given flow, the flow is removed from the established flow table.
@@ -25,8 +25,12 @@ autoreply define lb_conf
     @param context - sender context, to match reply w/ request
     @param ip_prefix - IP address (IPv4 in lower order 32 bits).
     @param prefix_length - IP prefix length (96 + 'IPv4 prefix length' for IPv4).
-    @param encap - Encap is ip4 GRE(0) or ip6 GRE(1) or L3DSR(2).
+    @param encap - Encap is ip4 GRE(0) or ip6 GRE(1) or L3DSR(2) or NAT4(3) or NAT6(4).
     @param dscp - DSCP bit corresponding to VIP(applicable in L3DSR mode only).
+    @param type - service type(applicable in NAT4/NAT6 mode only).
+    @param port - service port(applicable in NAT4/NAT6 mode only).
+    @param target_port - Pod's port corresponding to specific service(applicable in NAT4/NAT6 mode only).
+    @param node_port - Node's port(applicable in NAT4/NAT6 mode only).
     @param new_flows_table_length - Size of the new connections flow table used
            for this VIP (must be power of 2).
     @param is_del - The VIP should be removed.
@@ -38,6 +42,10 @@ autoreply define lb_add_del_vip {
   u8 prefix_length;
   u8 encap;
   u8 dscp;
+  u8 type;
+  u16 port;
+  u16 target_port;
+  u16 node_port;
   u32 new_flows_table_length;
   u8 is_del;
 };
diff --git a/src/plugins/lb/lb.c b/src/plugins/lb/lb.c
index 090d190e08b..e1d4df55a3e 100644
--- a/src/plugins/lb/lb.c
+++ b/src/plugins/lb/lb.c
@@ -17,6 +17,7 @@
 #include <vnet/plugin/plugin.h>
 #include <vpp/app/version.h>
 #include <vnet/api_errno.h>
+#include <vnet/udp/udp.h>
 
 //GC runs at most once every so many seconds
 #define LB_GARBAGE_RUN 60
@@ -36,22 +37,34 @@ const static char * const lb_dpo_gre4_ip4[] = { "lb4-gre4" , NULL };
 const static char * const lb_dpo_gre4_ip6[] = { "lb6-gre4" , NULL };
 const static char* const * const lb_dpo_gre4_nodes[DPO_PROTO_NUM] =
     {
-	[DPO_PROTO_IP4]  = lb_dpo_gre4_ip4,
-	[DPO_PROTO_IP6]  = lb_dpo_gre4_ip6,
+        [DPO_PROTO_IP4]  = lb_dpo_gre4_ip4,
+        [DPO_PROTO_IP6]  = lb_dpo_gre4_ip6,
     };
 
 const static char * const lb_dpo_gre6_ip4[] = { "lb4-gre6" , NULL };
 const static char * const lb_dpo_gre6_ip6[] = { "lb6-gre6" , NULL };
 const static char* const * const lb_dpo_gre6_nodes[DPO_PROTO_NUM] =
     {
-	[DPO_PROTO_IP4]  = lb_dpo_gre6_ip4,
-	[DPO_PROTO_IP6]  = lb_dpo_gre6_ip6,
+        [DPO_PROTO_IP4]  = lb_dpo_gre6_ip4,
+        [DPO_PROTO_IP6]  = lb_dpo_gre6_ip6,
     };
 
 const static char * const lb_dpo_l3dsr_ip4[] = { "lb4-l3dsr" , NULL };
 const static char* const * const lb_dpo_l3dsr_nodes[DPO_PROTO_NUM] =
     {
-	[DPO_PROTO_IP4]  = lb_dpo_l3dsr_ip4,
+        [DPO_PROTO_IP4]  = lb_dpo_l3dsr_ip4,
+    };
+
+const static char * const lb_dpo_nat4_ip4[] = { "lb4-nat4" , NULL };
+const static char* const * const lb_dpo_nat4_nodes[DPO_PROTO_NUM] =
+    {
+        [DPO_PROTO_IP4]  = lb_dpo_nat4_ip4,
+    };
+
+const static char * const lb_dpo_nat6_ip6[] = { "lb6-nat6" , NULL };
+const static char* const * const lb_dpo_nat6_nodes[DPO_PROTO_NUM] =
+    {
+        [DPO_PROTO_IP6]  = lb_dpo_nat6_ip6,
     };
 
 u32 lb_hash_time_now(vlib_main_t * vm)
@@ -88,6 +101,8 @@ static char *lb_vip_type_strings[] = {
     [LB_VIP_TYPE_IP4_GRE6] = "ip4-gre6",
     [LB_VIP_TYPE_IP4_GRE4] = "ip4-gre4",
     [LB_VIP_TYPE_IP4_L3DSR] = "ip4-l3dsr",
+    [LB_VIP_TYPE_IP4_NAT4] = "ip4-nat4",
+    [LB_VIP_TYPE_IP6_NAT6] = "ip6-nat6",
 };
 
 u8 *format_lb_vip_type (u8 * s, va_list * args)
@@ -115,20 +130,39 @@ uword unformat_lb_vip_type (unformat_input_t * input, va_list * args)
 u8 *format_lb_vip (u8 * s, va_list * args)
 {
   lb_vip_t *vip = va_arg (*args, lb_vip_t *);
-  return format(s, "%U %U new_size:%u #as:%u%s",
+  s = format(s, "%U %U new_size:%u #as:%u%s",
              format_lb_vip_type, vip->type,
              format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
              vip->new_flow_table_mask + 1,
              pool_elts(vip->as_indexes),
              (vip->flags & LB_VIP_FLAGS_USED)?"":" removed");
+
+  if (vip->type == LB_VIP_TYPE_IP4_L3DSR)
+    {
+      s = format(s, "  dscp:%u", vip->encap_args.dscp);
+    }
+  else if ((vip->type == LB_VIP_TYPE_IP4_NAT4)
+          || (vip->type == LB_VIP_TYPE_IP6_NAT6))
+    {
+      if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
+        s = format (s, "  type:clusterip port:%u target_port:%u",
+                    ntohs (vip->encap_args.port),
+                    ntohs (vip->encap_args.target_port));
+      else
+        s = format (s, "  type:nodeport node_port:%u target_port:%u",
+                    ntohs (vip->encap_args.node_port),
+                    ntohs (vip->encap_args.target_port));
+    }
+
+  return s;
 }
 
 u8 *format_lb_as (u8 * s, va_list * args)
 {
   lb_as_t *as = va_arg (*args, lb_as_t *);
   return format(s, "%U %s", format_ip46_address,
-		&as->address, IP46_TYPE_ANY,
-		(as->flags & LB_AS_FLAGS_USED)?"used":"removed");
+                &as->address, IP46_TYPE_ANY,
+                (as->flags & LB_AS_FLAGS_USED)?"used":"removed");
 }
 
 u8 *format_lb_vip_detailed (u8 * s, va_list * args)
@@ -151,7 +185,20 @@ u8 *format_lb_vip_detailed (u8 * s, va_list * args)
     {
       s = format(s, "%U  dscp:%u\n",
                     format_white_space, indent,
-		    vip->dscp);
+                    vip->encap_args.dscp);
+    }
+  else if ((vip->type == LB_VIP_TYPE_IP4_NAT4)
+          || (vip->type == LB_VIP_TYPE_IP6_NAT6))
+    {
+      if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
+        s = format (s, "%U  type:clusterip port:%u target_port:%u",
+                    format_white_space, indent, ntohs (vip->encap_args.port),
+                    ntohs (vip->encap_args.target_port));
+      else
+        s = format (s, "%U  type:nodeport node_port:%u target_port:%u",
+                    format_white_space, indent,
+                    ntohs (vip->encap_args.node_port),
+                    ntohs (vip->encap_args.target_port));
     }
 
   //Print counters
@@ -219,6 +266,11 @@ static int lb_pseudorand_compare(void *a, void *b)
 static void lb_vip_garbage_collection(lb_vip_t *vip)
 {
   lb_main_t *lbm = &lb_main;
+  lb_snat4_key_t m_key4;
+  clib_bihash_kv_8_8_t kv4, value4;
+  lb_snat6_key_t m_key6;
+  clib_bihash_kv_24_8_t kv6, value6;
+  lb_snat_mapping_t *m = 0;
   ASSERT (lbm->writer_lock[0]);
 
   u32 now = (u32) vlib_time_now(vlib_get_main());
@@ -231,18 +283,52 @@ static void lb_vip_garbage_collection(lb_vip_t *vip)
   pool_foreach(as_index, vip->as_indexes, {
       as = &lbm->ass[*as_index];
       if (!(as->flags & LB_AS_FLAGS_USED) && //Not used
-	  clib_u32_loop_gt(now, as->last_used + LB_CONCURRENCY_TIMEOUT) && //Not recently used
-	  (vlib_refcount_get(&lbm->as_refcount, as - lbm->ass) == 0))
-	{ //Not referenced
-	  fib_entry_child_remove(as->next_hop_fib_entry_index,
-				 as->next_hop_child_index);
-	  fib_table_entry_delete_index(as->next_hop_fib_entry_index,
-				       FIB_SOURCE_RR);
-	  as->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
-
-	  pool_put(vip->as_indexes, as_index);
-	  pool_put(lbm->ass, as);
-	}
+          clib_u32_loop_gt(now, as->last_used + LB_CONCURRENCY_TIMEOUT) && //Not recently used
+          (vlib_refcount_get(&lbm->as_refcount, as - lbm->ass) == 0))
+        { //Not referenced
+
+          if (lb_vip_is_nat4(vip)) {
+              m_key4.addr = as->address.ip4;
+              m_key4.port = vip->encap_args.target_port;
+              m_key4.protocol = 0;
+              m_key4.fib_index = 0;
+
+              kv4.key = m_key4.as_u64;
+              if(!clib_bihash_search_8_8(&lbm->mapping_by_as4, &kv4, &value4))
+                m = pool_elt_at_index (lbm->snat_mappings, value4.value);
+              ASSERT (m);
+
+              kv4.value = m - lbm->snat_mappings;
+              clib_bihash_add_del_8_8(&lbm->mapping_by_as4, &kv4, 0);
+             pool_put (lbm->snat_mappings, m);
+          } else if (lb_vip_is_nat6(vip)) {
+              m_key6.addr.as_u64[0] = as->address.ip6.as_u64[0];
+              m_key6.addr.as_u64[1] = as->address.ip6.as_u64[1];
+              m_key6.port = vip->encap_args.target_port;
+              m_key6.protocol = 0;
+              m_key6.fib_index = 0;
+
+              kv6.key[0] = m_key6.as_u64[0];
+              kv6.key[1] = m_key6.as_u64[1];
+              kv6.key[2] = m_key6.as_u64[2];
+
+              if (!clib_bihash_search_24_8 (&lbm->mapping_by_as6, &kv6, &value6))
+                m = pool_elt_at_index (lbm->snat_mappings, value6.value);
+              ASSERT (m);
+
+              kv6.value = m - lbm->snat_mappings;
+              clib_bihash_add_del_24_8(&lbm->mapping_by_as6, &kv6, 0);
+              pool_put (lbm->snat_mappings, m);
+          }
+          fib_entry_child_remove(as->next_hop_fib_entry_index,
+                                as->next_hop_child_index);
+          fib_table_entry_delete_index(as->next_hop_fib_entry_index,
+                                       FIB_SOURCE_RR);
+          as->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
+
+          pool_put(vip->as_indexes, as_index);
+          pool_put(lbm->ass, as);
+        }
   });
 }
 
@@ -453,6 +539,7 @@ int lb_vip_add_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
   u32 *to_be_updated = 0;
   u32 i;
   u32 *ip;
+  lb_snat_mapping_t *m;
 
   //Sanity check
   while (n--) {
@@ -512,26 +599,96 @@ next:
      */
     fib_prefix_t nh = {};
     if (lb_encap_is_ip4(vip)) {
-	nh.fp_addr.ip4 = as->address.ip4;
-	nh.fp_len = 32;
-	nh.fp_proto = FIB_PROTOCOL_IP4;
+        nh.fp_addr.ip4 = as->address.ip4;
+        nh.fp_len = 32;
+        nh.fp_proto = FIB_PROTOCOL_IP4;
     } else {
-	nh.fp_addr.ip6 = as->address.ip6;
-	nh.fp_len = 128;
-	nh.fp_proto = FIB_PROTOCOL_IP6;
+        nh.fp_addr.ip6 = as->address.ip6;
+        nh.fp_len = 128;
+        nh.fp_proto = FIB_PROTOCOL_IP6;
     }
 
     as->next_hop_fib_entry_index =
 	fib_table_entry_special_add(0,
-				    &nh,
-				    FIB_SOURCE_RR,
-				    FIB_ENTRY_FLAG_NONE);
+                                    &nh,
+                                    FIB_SOURCE_RR,
+                                    FIB_ENTRY_FLAG_NONE);
     as->next_hop_child_index =
 	fib_entry_child_add(as->next_hop_fib_entry_index,
-			    lbm->fib_node_type,
-			    as - lbm->ass);
+                            lbm->fib_node_type,
+                            as - lbm->ass);
 
     lb_as_stack(as);
+
+    if ( lb_vip_is_nat4(vip) || lb_vip_is_nat6(vip) )
+      {
+        /* Add SNAT static mapping */
+        pool_get (lbm->snat_mappings, m);
+        memset (m, 0, sizeof (*m));
+        if (lb_vip_is_nat4(vip)) {
+            lb_snat4_key_t m_key4;
+            clib_bihash_kv_8_8_t kv4;
+            m_key4.addr = as->address.ip4;
+            m_key4.port = vip->encap_args.target_port;
+            m_key4.protocol = 0;
+            m_key4.fib_index = 0;
+
+            if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
+              {
+                m->src_ip.ip4 = vip->prefix.ip4;
+                m->src_port = vip->encap_args.port;
+              }
+            else if (vip->encap_args.srv_type == LB_SRV_TYPE_NODEPORT)
+              {
+                m->src_ip.ip4 = lbm->ip4_src_address;
+                m->src_port = vip->encap_args.node_port;
+              }
+            m->src_ip_is_ipv6 = 0;
+            m->as_ip.ip4 = as->address.ip4;
+            m->as_ip_is_ipv6 = 0;;
+            m->target_port = vip->encap_args.target_port;
+            m->vrf_id = 0;
+            m->fib_index = 0;
+
+            kv4.key = m_key4.as_u64;
+            kv4.value = m - lbm->snat_mappings;
+            clib_bihash_add_del_8_8(&lbm->mapping_by_as4, &kv4, 1);
+        } else {
+            lb_snat6_key_t m_key6;
+            clib_bihash_kv_24_8_t kv6;
+            m_key6.addr.as_u64[0] = as->address.ip6.as_u64[0];
+            m_key6.addr.as_u64[1] = as->address.ip6.as_u64[1];
+            m_key6.port = vip->encap_args.target_port;
+            m_key6.protocol = 0;
+            m_key6.fib_index = 0;
+
+            if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
+              {
+                m->src_ip.ip6.as_u64[0] = vip->prefix.ip6.as_u64[0];
+                m->src_ip.ip6.as_u64[1] = vip->prefix.ip6.as_u64[1];
+                m->src_port = vip->encap_args.port;
+              }
+            else if (vip->encap_args.srv_type == LB_SRV_TYPE_NODEPORT)
+              {
+                m->src_ip.ip6.as_u64[0] = lbm->ip6_src_address.as_u64[0];
+                m->src_ip.ip6.as_u64[1] = lbm->ip6_src_address.as_u64[1];
+                m->src_port = vip->encap_args.node_port;
+              }
+            m->src_ip_is_ipv6 = 1;
+            m->as_ip.ip6.as_u64[0] = as->address.ip6.as_u64[0];
+            m->as_ip.ip6.as_u64[1] = as->address.ip6.as_u64[1];
+            m->as_ip_is_ipv6 = 1;
+            m->target_port = vip->encap_args.target_port;
+            m->vrf_id = 0;
+            m->fib_index = 0;
+
+            kv6.key[0] = m_key6.as_u64[0];
+            kv6.key[1] = m_key6.as_u64[1];
+            kv6.key[2] = m_key6.as_u64[2];
+            kv6.value = m - lbm->snat_mappings;
+            clib_bihash_add_del_24_8(&lbm->mapping_by_as6, &kv6, 1);
+        }
+      }
   }
   vec_free(to_be_added);
 
@@ -631,13 +788,17 @@ static void lb_vip_add_adjacency(lb_main_t *lbm, lb_vip_t *vip)
     dpo_type = lbm->dpo_gre6_type;
   else if (lb_vip_is_l3dsr(vip))
     dpo_type = lbm->dpo_l3dsr_type;
+  else if(lb_vip_is_nat4(vip))
+    dpo_type = lbm->dpo_nat4_type;
+  else if (lb_vip_is_nat6(vip))
+    dpo_type = lbm->dpo_nat6_type;
 
   dpo_set(&dpo, dpo_type, proto, vip - lbm->vips);
   fib_table_entry_special_dpo_add(0,
-				  &pfx,
-				  FIB_SOURCE_PLUGIN_HI,
-				  FIB_ENTRY_FLAG_EXCLUSIVE,
-				  &dpo);
+                                  &pfx,
+                                  FIB_SOURCE_PLUGIN_HI,
+                                  FIB_ENTRY_FLAG_EXCLUSIVE,
+                                  &dpo);
   dpo_reset(&dpo);
 }
 
@@ -659,37 +820,41 @@ static void lb_vip_del_adjacency(lb_main_t *lbm, lb_vip_t *vip)
   fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI);
 }
 
-int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u8 dscp,
-	       u32 new_length, u32 *vip_index)
+int lb_vip_add(lb_vip_add_args_t args, u32 *vip_index)
 {
   lb_main_t *lbm = &lb_main;
+  vlib_main_t *vm = vlib_get_main();
   lb_vip_t *vip;
+  lb_vip_type_t type = args.type;
+  u16 node_port = args.encap_args.node_port;
 
   lb_get_writer_lock();
-  ip46_prefix_normalize(prefix, plen);
+  ip46_prefix_normalize(&(args.prefix), args.plen);
 
-  if (!lb_vip_find_index_with_lock(prefix, plen, vip_index)) {
+  if (!lb_vip_find_index_with_lock(&(args.prefix), args.plen, vip_index)) {
     lb_put_writer_lock();
     return VNET_API_ERROR_VALUE_EXIST;
   }
 
-  if (!is_pow2(new_length)) {
+  if (!is_pow2(args.new_length)) {
     lb_put_writer_lock();
     return VNET_API_ERROR_INVALID_MEMORY_SIZE;
   }
 
-  if (ip46_prefix_is_ip4(prefix, plen) &&
+  if (ip46_prefix_is_ip4(&(args.prefix), args.plen) &&
       (type != LB_VIP_TYPE_IP4_GRE4) &&
       (type != LB_VIP_TYPE_IP4_GRE6) &&
-      (type != LB_VIP_TYPE_IP4_L3DSR))
+      (type != LB_VIP_TYPE_IP4_L3DSR) &&
+      (type != LB_VIP_TYPE_IP4_NAT4))
     return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
 
-  if ((!ip46_prefix_is_ip4(prefix, plen)) &&
+  if ((!ip46_prefix_is_ip4(&(args.prefix), args.plen)) &&
       (type != LB_VIP_TYPE_IP6_GRE4) &&
-      (type != LB_VIP_TYPE_IP6_GRE6))
+      (type != LB_VIP_TYPE_IP6_GRE6) &&
+      (type != LB_VIP_TYPE_IP6_NAT6))
     return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
 
-  if ((type == LB_VIP_TYPE_IP4_L3DSR) && (dscp >= 64 ) )
+  if ((type == LB_VIP_TYPE_IP4_L3DSR) && (args.encap_args.dscp >= 64 ) )
     {
       return VNET_API_ERROR_VALUE_EXIST;
     }
@@ -698,11 +863,23 @@ int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u8 dscp,
   pool_get(lbm->vips, vip);
 
   //Init
-  vip->prefix = *prefix;
-  vip->plen = plen;
+  memcpy (&(vip->prefix), &(args.prefix), sizeof(args.prefix));
+  vip->plen = args.plen;
   vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main());
-  vip->type = type;
-  vip->dscp = dscp;
+  vip->type = args.type;
+
+  if (args.type == LB_VIP_TYPE_IP4_L3DSR) {
+      vip->encap_args.dscp = args.encap_args.dscp;
+    }
+  else if ((args.type == LB_VIP_TYPE_IP4_NAT4)
+	    ||(args.type == LB_VIP_TYPE_IP6_NAT6)) {
+      vip->encap_args.srv_type = args.encap_args.srv_type;
+      vip->encap_args.port = clib_host_to_net_u16(args.encap_args.port);
+      vip->encap_args.target_port =
+          clib_host_to_net_u16(args.encap_args.target_port);
+      vip->encap_args.node_port = clib_host_to_net_u16(node_port);
+    }
+
   vip->flags = LB_VIP_FLAGS_USED;
   vip->as_indexes = 0;
 
@@ -714,7 +891,7 @@ int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u8 dscp,
   }
 
   //Configure new flow table
-  vip->new_flow_table_mask = new_length - 1;
+  vip->new_flow_table_mask = args.new_length - 1;
   vip->new_flow_table = 0;
 
   //Create a new flow hash table full of the default entry
@@ -723,6 +900,27 @@ int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u8 dscp,
   //Create adjacency to direct traffic
   lb_vip_add_adjacency(lbm, vip);
 
+  if ( (lb_vip_is_nat4(vip) || lb_vip_is_nat6(vip))
+      && (args.encap_args.srv_type == LB_SRV_TYPE_NODEPORT) )
+    {
+      u32 key;
+      uword * entry;
+
+      //Create maping from nodeport to vip_index
+      key = clib_host_to_net_u16(node_port);
+      entry = hash_get_mem (lbm->vip_index_by_nodeport, &key);
+      if (entry) {
+        lb_put_writer_lock();
+        return VNET_API_ERROR_VALUE_EXIST;
+      }
+
+      hash_set_mem (lbm->vip_index_by_nodeport, &key, vip - lbm->vips);
+
+      /* receive packets destined to NodeIP:NodePort */
+      udp_register_dst_port (vm, node_port, lb4_nodeport_node.index, 1);
+      udp_register_dst_port (vm, node_port, lb6_nodeport_node.index, 0);
+    }
+
   //Return result
   *vip_index = vip - lbm->vips;
 
@@ -819,12 +1017,16 @@ lb_as_stack (lb_as_t *as)
     dpo_type = lbm->dpo_gre6_type;
   else if (lb_vip_is_l3dsr(vip))
     dpo_type = lbm->dpo_l3dsr_type;
+  else if(lb_vip_is_nat4(vip))
+    dpo_type = lbm->dpo_nat4_type;
+  else if (lb_vip_is_nat6(vip))
+    dpo_type = lbm->dpo_nat6_type;
 
   dpo_stack(dpo_type,
-	    lb_vip_is_ip4(vip)?DPO_PROTO_IP4:DPO_PROTO_IP6,
-	    &as->dpo,
-	    fib_entry_contribute_ip_forwarding(
-		as->next_hop_fib_entry_index));
+            lb_vip_is_ip4(vip)?DPO_PROTO_IP4:DPO_PROTO_IP6,
+            &as->dpo,
+            fib_entry_contribute_ip_forwarding(
+                as->next_hop_fib_entry_index));
 }
 
 static fib_node_back_walk_rc_t
@@ -835,11 +1037,46 @@ lb_fib_node_back_walk_notify (fib_node_t *node,
     return (FIB_NODE_BACK_WALK_CONTINUE);
 }
 
+int lb_nat4_interface_add_del (u32 sw_if_index, int is_del)
+{
+  if (is_del)
+    {
+      vnet_feature_enable_disable ("ip4-unicast", "lb-nat4-in2out",
+                                   sw_if_index, 0, 0, 0);
+    }
+  else
+    {
+      vnet_feature_enable_disable ("ip4-unicast", "lb-nat4-in2out",
+                                   sw_if_index, 1, 0, 0);
+    }
+
+  return 0;
+}
+
+int lb_nat6_interface_add_del (u32 sw_if_index, int is_del)
+{
+  if (is_del)
+    {
+      vnet_feature_enable_disable ("ip6-unicast", "lb-nat6-in2out",
+                                   sw_if_index, 0, 0, 0);
+    }
+  else
+    {
+      vnet_feature_enable_disable ("ip6-unicast", "lb-nat6-in2out",
+                                   sw_if_index, 1, 0, 0);
+    }
+
+  return 0;
+}
+
 clib_error_t *
 lb_init (vlib_main_t * vm)
 {
   vlib_thread_main_t *tm = vlib_get_thread_main ();
   lb_main_t *lbm = &lb_main;
+  lbm->vnet_main = vnet_get_main ();
+  lbm->vlib_main = vm;
+
   lb_as_t *default_as;
   fib_node_vft_t lb_fib_node_vft = {
       .fnv_get = lb_fib_node_get_node,
@@ -865,6 +1102,8 @@ lb_init (vlib_main_t * vm)
   lbm->dpo_gre4_type = dpo_register_new_type(&lb_vft, lb_dpo_gre4_nodes);
   lbm->dpo_gre6_type = dpo_register_new_type(&lb_vft, lb_dpo_gre6_nodes);
   lbm->dpo_l3dsr_type = dpo_register_new_type(&lb_vft, lb_dpo_l3dsr_nodes);
+  lbm->dpo_nat4_type = dpo_register_new_type(&lb_vft, lb_dpo_nat4_nodes);
+  lbm->dpo_nat6_type = dpo_register_new_type(&lb_vft, lb_dpo_nat6_nodes);
   lbm->fib_node_type = fib_node_register_new_type(&lb_fib_node_vft);
 
   //Init AS reference counters
@@ -879,6 +1118,17 @@ lb_init (vlib_main_t * vm)
   default_as->address.ip6.as_u64[0] = 0xffffffffffffffffL;
   default_as->address.ip6.as_u64[1] = 0xffffffffffffffffL;
 
+  lbm->vip_index_by_nodeport
+    = hash_create_mem (0, sizeof(u16), sizeof (uword));
+
+  clib_bihash_init_8_8 (&lbm->mapping_by_as4,
+                        "mapping_by_as4", LB_MAPPING_BUCKETS,
+                        LB_MAPPING_MEMORY_SIZE);
+
+  clib_bihash_init_24_8 (&lbm->mapping_by_as6,
+                        "mapping_by_as6", LB_MAPPING_BUCKETS,
+                        LB_MAPPING_MEMORY_SIZE);
+
 #define _(a,b,c) lbm->vip_counters[c].name = b;
   lb_foreach_vip_counter
 #undef _
diff --git a/src/plugins/lb/lb.h b/src/plugins/lb/lb.h
index 61d17d713a5..1526298b0fa 100644
--- a/src/plugins/lb/lb.h
+++ b/src/plugins/lb/lb.h
@@ -38,17 +38,65 @@
 #include <vnet/dpo/dpo.h>
 #include <vnet/fib/fib_table.h>
 #include <vppinfra/hash.h>
-
+#include <vppinfra/bihash_8_8.h>
+#include <vppinfra/bihash_24_8.h>
 #include <lb/lbhash.h>
 
 #define LB_DEFAULT_PER_CPU_STICKY_BUCKETS 1 << 10
 #define LB_DEFAULT_FLOW_TIMEOUT 40
+#define LB_MAPPING_BUCKETS  1024
+#define LB_MAPPING_MEMORY_SIZE  64<<20
 
 typedef enum {
   LB_NEXT_DROP,
   LB_N_NEXT,
 } lb_next_t;
 
+typedef enum {
+  LB_NAT4_IN2OUT_NEXT_DROP,
+  LB_NAT4_IN2OUT_NEXT_LOOKUP,
+  LB_NAT4_IN2OUT_N_NEXT,
+} LB_nat4_in2out_next_t;
+
+typedef enum {
+  LB_NAT6_IN2OUT_NEXT_DROP,
+  LB_NAT6_IN2OUT_NEXT_LOOKUP,
+  LB_NAT6_IN2OUT_N_NEXT,
+} LB_nat6_in2out_next_t;
+
+#define foreach_lb_nat_in2out_error                       \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol")         \
+_(IN2OUT_PACKETS, "Good in2out packets processed")      \
+_(NO_TRANSLATION, "No translation")
+
+typedef enum {
+#define _(sym,str) LB_NAT_IN2OUT_ERROR_##sym,
+  foreach_lb_nat_in2out_error
+#undef _
+  LB_NAT_IN2OUT_N_ERROR,
+} lb_nat_in2out_error_t;
+
+/**
+ * lb for kube-proxy supports three types of service
+ */
+typedef enum {
+  LB_SRV_TYPE_CLUSTERIP,
+  LB_SRV_TYPE_NODEPORT,
+  LB_SRV_N_TYPES,
+} lb_svr_type_t;
+
+typedef enum {
+  LB4_NODEPORT_NEXT_IP4_NAT4,
+  LB4_NODEPORT_NEXT_DROP,
+  LB4_NODEPORT_N_NEXT,
+} lb4_nodeport_next_t;
+
+typedef enum {
+  LB6_NODEPORT_NEXT_IP6_NAT6,
+  LB6_NODEPORT_NEXT_DROP,
+  LB6_NODEPORT_N_NEXT,
+} lb6_nodeport_next_t;
+
 /**
  * Each VIP is configured with a set of
  * application server.
@@ -133,12 +181,14 @@ typedef enum {
   LB_ENCAP_TYPE_GRE4,
   LB_ENCAP_TYPE_GRE6,
   LB_ENCAP_TYPE_L3DSR,
+  LB_ENCAP_TYPE_NAT4,
+  LB_ENCAP_TYPE_NAT6,
   LB_ENCAP_N_TYPES,
 } lb_encap_type_t;
 
 /**
  * The load balancer supports IPv4 and IPv6 traffic
- * and GRE4, GRE6 and L3DSR encap.
+ * and GRE4, GRE6, L3DSR and NAT4, NAT6 encap.
  */
 typedef enum {
   LB_VIP_TYPE_IP6_GRE6,
@@ -146,13 +196,39 @@ typedef enum {
   LB_VIP_TYPE_IP4_GRE6,
   LB_VIP_TYPE_IP4_GRE4,
   LB_VIP_TYPE_IP4_L3DSR,
+  LB_VIP_TYPE_IP4_NAT4,
+  LB_VIP_TYPE_IP6_NAT6,
   LB_VIP_N_TYPES,
 } lb_vip_type_t;
 
-
 format_function_t format_lb_vip_type;
 unformat_function_t unformat_lb_vip_type;
 
+
+/* args for different vip encap types */
+typedef struct {
+  union
+  {
+    struct
+    {
+      /* Service type. clusterip or nodeport */
+      u8 srv_type;
+
+      /* Service port. network byte order */
+      u16 port;
+
+      /* Pod's port corresponding to specific service. network byte order */
+      u16 target_port;
+
+      /* Node's port, can access service via NodeIP:node_port. network byte order */
+      u16 node_port;
+    };
+    /* DSCP bits for L3DSR */
+    u8 dscp;
+    u64 as_u64;
+  };
+} lb_vip_encap_args_t;
+
 /**
  * Load balancing service is provided per VIP.
  * In this data model, a VIP can be a whole prefix.
@@ -205,10 +281,8 @@ typedef struct {
    */
   lb_vip_type_t type;
 
-  /**
-   * DSCP bits for L3DSR
-   */
-  u8 dscp;
+  /* args for different vip encap types */
+  lb_vip_encap_args_t encap_args;
 
   /**
    * Flags related to this VIP.
@@ -229,21 +303,100 @@ typedef struct {
 
 #define lb_vip_is_ip4(vip) ((vip)->type == LB_VIP_TYPE_IP4_GRE6 \
                             || (vip)->type == LB_VIP_TYPE_IP4_GRE4 \
-			    || (vip)->type == LB_VIP_TYPE_IP4_L3DSR )
+                            || (vip)->type == LB_VIP_TYPE_IP4_L3DSR \
+                            || (vip)->type == LB_VIP_TYPE_IP4_NAT4 )
 
 #define lb_vip_is_gre4(vip) ((vip)->type == LB_VIP_TYPE_IP6_GRE4 \
                              || (vip)->type == LB_VIP_TYPE_IP4_GRE4)
+
 #define lb_vip_is_gre6(vip) ((vip)->type == LB_VIP_TYPE_IP6_GRE6 \
                              || (vip)->type == LB_VIP_TYPE_IP4_GRE6)
-#define lb_vip_is_l3dsr(vip) (vip)->type == LB_VIP_TYPE_IP4_L3DSR
+
+#define lb_vip_is_l3dsr(vip) ((vip)->type == LB_VIP_TYPE_IP4_L3DSR)
+
+#define lb_vip_is_nat4(vip) ((vip)->type == LB_VIP_TYPE_IP4_NAT4)
+
+#define lb_vip_is_nat6(vip) ((vip)->type == LB_VIP_TYPE_IP6_NAT6)
 
 #define lb_encap_is_ip4(vip) ((vip)->type == LB_VIP_TYPE_IP6_GRE4 \
                              || (vip)->type == LB_VIP_TYPE_IP4_GRE4 \
-			     || (vip)->type == LB_VIP_TYPE_IP4_L3DSR)
+                             || (vip)->type == LB_VIP_TYPE_IP4_L3DSR \
+                             || (vip)->type == LB_VIP_TYPE_IP4_NAT4 )
 
 format_function_t format_lb_vip;
 format_function_t format_lb_vip_detailed;
 
+#define foreach_lb_nat_protocol \
+  _(UDP, 0, udp, "udp")       \
+  _(TCP, 1, tcp, "tcp")
+
+typedef enum {
+#define _(N, i, n, s) LB_NAT_PROTOCOL_##N = i,
+  foreach_lb_nat_protocol
+#undef _
+} lb_nat_protocol_t;
+
+always_inline u32
+lb_ip_proto_to_nat_proto (u8 ip_proto)
+{
+  u32 nat_proto = ~0;
+
+  nat_proto = (ip_proto == IP_PROTOCOL_UDP) ? LB_NAT_PROTOCOL_UDP : nat_proto;
+  nat_proto = (ip_proto == IP_PROTOCOL_TCP) ? LB_NAT_PROTOCOL_TCP : nat_proto;
+
+  return nat_proto;
+}
+
+/* Key for Pod's egress SNAT */
+typedef struct {
+  union
+  {
+    struct
+    {
+      ip4_address_t addr;
+      u16 port;
+      u16 protocol:3,
+          fib_index:13;
+    };
+    u64 as_u64;
+  };
+} lb_snat4_key_t;
+
+typedef struct
+{
+  union
+  {
+    struct
+    {
+      ip6_address_t addr;
+      u16 port;
+      u16 protocol;
+      u32 fib_index;
+    };
+    u64 as_u64[3];
+  };
+} lb_snat6_key_t;
+
+typedef struct {
+  /**
+   * for vip + port case, src_ip = vip;
+   * for node ip + node_port, src_ip = node_ip
+   */
+  ip46_address_t src_ip;
+  ip46_address_t as_ip;
+  u8 src_ip_is_ipv6;
+  u8 as_ip_is_ipv6;
+  /**
+   * Network byte order
+   * for vip + port case, src_port = port;
+   * for node ip + node_port, src_port = node_port
+   */
+  u16 src_port;
+  u16 target_port; /* Network byte order */
+  u32 vrf_id;
+  u32 fib_index;
+} lb_snat_mapping_t;
+
 typedef struct {
   /**
    * Each CPU has its own sticky flow hash table.
@@ -273,6 +426,9 @@ typedef struct {
    */
   vlib_refcount_t as_refcount;
 
+  /* hash lookup vip_index by key: {u16: nodeport} */
+  uword * vip_index_by_nodeport;
+
   /**
    * Some global data is per-cpu
    */
@@ -314,23 +470,49 @@ typedef struct {
   dpo_type_t dpo_gre4_type;
   dpo_type_t dpo_gre6_type;
   dpo_type_t dpo_l3dsr_type;
+  dpo_type_t dpo_nat4_type;
+  dpo_type_t dpo_nat6_type;
 
   /**
    * Node type for registering to fib changes.
    */
   fib_node_type_t fib_node_type;
 
+  /* Find a static mapping by AS IP : target_port */
+  clib_bihash_8_8_t mapping_by_as4;
+  clib_bihash_24_8_t mapping_by_as6;
+
+  /* Static mapping pool */
+  lb_snat_mapping_t * snat_mappings;
+
   /**
    * API dynamically registered base ID.
    */
   u16 msg_id_base;
 
   volatile u32 *writer_lock;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
 } lb_main_t;
 
+/* args for different vip encap types */
+typedef struct {
+  ip46_address_t prefix;
+  u8 plen;
+  lb_vip_type_t type;
+  u32 new_length;
+  lb_vip_encap_args_t encap_args;
+} lb_vip_add_args_t;
+
 extern lb_main_t lb_main;
-extern vlib_node_registration_t lb6_node;
 extern vlib_node_registration_t lb4_node;
+extern vlib_node_registration_t lb6_node;
+extern vlib_node_registration_t lb4_nodeport_node;
+extern vlib_node_registration_t lb6_nodeport_node;
+extern vlib_node_registration_t lb_nat4_in2out_node;
+extern vlib_node_registration_t lb_nat6_in2out_node;
 
 /**
  * Fix global load-balancer parameters.
@@ -341,8 +523,8 @@ extern vlib_node_registration_t lb4_node;
 int lb_conf(ip4_address_t *ip4_address, ip6_address_t *ip6_address,
             u32 sticky_buckets, u32 flow_timeout);
 
-int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u8 dscp,
-	       u32 new_length, u32 *vip_index);
+int lb_vip_add(lb_vip_add_args_t args, u32 *vip_index);
+
 int lb_vip_del(u32 vip_index);
 
 int lb_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index);
@@ -356,6 +538,9 @@ u32 lb_hash_time_now(vlib_main_t * vm);
 
 void lb_garbage_collection();
 
+int lb_nat4_interface_add_del (u32 sw_if_index, int is_del);
+int lb_nat6_interface_add_del (u32 sw_if_index, int is_del);
+
 format_function_t format_lb_main;
 
 #endif /* LB_PLUGIN_LB_LB_H_ */
diff --git a/src/plugins/lb/lb_plugin_doc.md b/src/plugins/lb/lb_plugin_doc.md
index 7672b1e88d7..25a4cfa11df 100644
--- a/src/plugins/lb/lb_plugin_doc.md
+++ b/src/plugins/lb/lb_plugin_doc.md
@@ -29,6 +29,32 @@ Both VIPs or ASs can be IPv4 or IPv6, but for a given VIP, all ASs must be using
 the same encap. type (i.e. IPv4+GRE or IPv6+GRE or IPv4+L3DSR).
 Meaning that for a given VIP, all AS addresses must be of the same family.
 
+3). IPv4/IPv6 + NAT4/NAT6 encap types:
+This type provides kube-proxy data plane on user space,
+which is used to replace linux kernal's kube-proxy based on iptables.
+
+Currently, load balancer plugin supports three service types:
+a) Cluster IP plus Port: support any protocols, including TCP, UDP.
+b) Node IP plus Node Port: currently only support UDP.
+c) External Load Balancer.
+
+For Cluster IP plus Port case:
+kube-proxy is configured with a set of Virtual IPs (VIP, which can be
+prefixes), and for each VIP, with a set of AS addresses (ASs).
+
+For a specific session received for a given VIP (or VIP prefix),
+first packet selects a AS according to internal load balancing algorithm,
+then does DNAT operation and sent to chosen AS.
+At the same time, will create a session entry to store AS chosen result.
+Following packets for that session will look up session table first,
+which ensures that a given session will always be routed to the same AS.
+
+For returned packet from AS, it will do SNAT operation and sent out.
+
+Please refer to below for details:
+https://schd.ws/hosted_files/ossna2017/1e/VPP_K8S_GTPU_OSSNA.pdf
+
+
 ## Performances
 
 The load balancer has been tested up to 1 millions flows and still forwards more
@@ -45,9 +71,11 @@ The load balancer needs to be configured with some parameters:
 	lb conf [ip4-src-address <addr>] [ip6-src-address <addr>]
 	        [buckets <n>] [timeout <s>]
 
-ip4-src-address: the source address used to send encap. packets using IPv4.
+ip4-src-address: the source address used to send encap. packets using IPv4 for GRE4 mode.
+                 or Node IP4 address for NAT4 mode.
 
-ip6-src-address: the source address used to send encap. packets using IPv6.
+ip6-src-address: the source address used to send encap. packets using IPv6 for GRE6 mode.
+                 or Node IP6 address for NAT6 mode.
 
 buckets:         the *per-thread* established-connexions-table number of buckets.
 
@@ -57,13 +85,15 @@ timeout:         the number of seconds a connection will remain in the
 
 ### Configure the VIPs
 
-    lb vip <prefix> [encap (gre6|gre4|l3dsr)] [dscp <n>] [new_len <n>] [del]
+    lb vip <prefix> [encap (gre6|gre4|l3dsr|nat4|nat6)] \
+      [dscp <n>] [port <n> target_port <n> node_port <n>] [new_len <n>] [del]
 
 new_len is the size of the new-connection-table. It should be 1 or 2 orders of
 magnitude bigger than the number of ASs for the VIP in order to ensure a good
 load balancing.
 Encap l3dsr and dscp is used to map VIP to dscp bit and rewrite DSCP bit in packets.
 So the selected server could get VIP from DSCP bit in this packet and perform DSR.
+Encap nat4/nat6 and port/target_port/node_port is used to do kube-proxy data plane.
 
 Examples:
 
@@ -72,6 +102,8 @@ Examples:
     lb vip 80.0.0.0/8 encap gre6 new_len 16
     lb vip 90.0.0.0/8 encap gre4 new_len 1024
     lb vip 100.0.0.0/8 encap l3dsr dscp 2 new_len 32
+    lb vip 90.1.2.1/32 encap nat4 port 3306 target_port 3307 node_port 30964 new_len 1024
+    lb vip 2004::/16 encap nat6 port 6306 target_port 6307 node_port 30966 new_len 1024
 
 ### Configure the ASs (for each VIP)
 
@@ -86,8 +118,18 @@ Examples:
     lb as 2003::/16 10.0.0.1 10.0.0.2
     lb as 80.0.0.0/8 2001::2
     lb as 90.0.0.0/8 10.0.0.1
-    
-    
+
+### Configure SNAT
+
+    lb set interface nat4 in <intfc> [del]
+
+Set SNAT feature in a specific interface.
+(applicable in NAT4 mode only)
+
+    lb set interface nat6 in <intfc> [del]
+
+Set SNAT feature in a specific interface.
+(applicable in NAT6 mode only)
 
 ## Monitoring
 
@@ -97,7 +139,7 @@ These are still subject to quite significant changes.
     show lb
     show lb vip
     show lb vip verbose
-    
+
     show node counters
 
 
@@ -105,9 +147,9 @@ These are still subject to quite significant changes.
 
 ### Multi-Threading
 
-MagLev is a distributed system which pseudo-randomly generates a 
-new-connections-table based on AS names such that each server configured with 
-the same set of ASs ends up with the same table. Connection stickyness is then 
+MagLev is a distributed system which pseudo-randomly generates a
+new-connections-table based on AS names such that each server configured with
+the same set of ASs ends up with the same table. Connection stickyness is then
 ensured with an established-connections-table. Using ECMP, it is assumed (but
 not relied on) that servers will mostly receive traffic for different flows.
 
@@ -133,8 +175,8 @@ When an AS is removed, there is two possible ways to react.
 	- Keep using the AS for established connections
 	- Change AS for established connections (likely to cause error for TCP)
 
-In the first case, although an AS is removed from the configuration, its 
-associated state needs to stay around as long as it is used by at least one 
+In the first case, although an AS is removed from the configuration, its
+associated state needs to stay around as long as it is used by at least one
 thread.
 
 In order to avoid locks, a specific reference counter is used. The design is quite
diff --git a/src/plugins/lb/lb_test.c b/src/plugins/lb/lb_test.c
index b02793944c5..fc498706222 100644
--- a/src/plugins/lb/lb_test.c
+++ b/src/plugins/lb/lb_test.c
@@ -171,6 +171,10 @@ static int api_lb_add_del_vip (vat_main_t * vam)
     mps.encap = LB_ENCAP_TYPE_GRE6;
   } else if (unformat(i, "l3dsr")) {
     mps.encap = LB_ENCAP_TYPE_L3DSR;
+  } else if (unformat(i, "nat4")) {
+    mps.encap = LB_ENCAP_TYPE_NAT4;
+  } else if (unformat(i, "nat6")) {
+    mps.encap = LB_ENCAP_TYPE_NAT6;
   } else {
     errmsg ("no encap\n");
     return -99;
@@ -221,7 +225,9 @@ static int api_lb_add_del_as (vat_main_t * vam)
  */
 #define foreach_vpe_api_msg                             \
 _(lb_conf, "<ip4-src-addr> <ip6-src-address> <sticky_buckets_per_core> <flow_timeout>") \
-_(lb_add_del_vip, "<ip-prefix> [gre4|gre6] <new_table_len> [del]") \
+_(lb_add_del_vip, "<ip-prefix> [gre4|gre6|l3dsr|nat4|nat6] " \
+                  "<dscp> <port> <target_port> <node_port> " \
+                  "<new_table_len> [del]") \
 _(lb_add_del_as, "<vip-ip-prefix> <address> [del]")
 
 static void 
diff --git a/src/plugins/lb/node.c b/src/plugins/lb/node.c
index 529da73bcff..e19964d2f1c 100644
--- a/src/plugins/lb/node.c
+++ b/src/plugins/lb/node.c
@@ -14,6 +14,7 @@
  */
 
 #include <lb/lb.h>
+#include <vnet/fib/ip4_fib.h>
 
 #include <vnet/gre/packet.h>
 #include <lb/lbhash.h>
@@ -22,69 +23,136 @@
  _(NONE, "no error") \
  _(PROTO_NOT_SUPPORTED, "protocol not supported")
 
-typedef enum {
+typedef enum
+{
 #define _(sym,str) LB_ERROR_##sym,
   foreach_lb_error
 #undef _
-    LB_N_ERROR,
+  LB_N_ERROR,
 } lb_error_t;
 
-static char *lb_error_strings[] = {
+static char *lb_error_strings[] =
+  {
 #define _(sym,string) string,
-    foreach_lb_error
+      foreach_lb_error
 #undef _
-};
+    };
 
-typedef struct {
+typedef struct
+{
   u32 vip_index;
   u32 as_index;
 } lb_trace_t;
 
+typedef struct
+{
+  u32 vip_index;
+
+  u32 node_port;
+} lb_nodeport_trace_t;
+
+typedef struct
+{
+  u32 vip_index;
+  u32 as_index;
+  u32 rx_sw_if_index;
+  u32 next_index;
+} lb_nat_trace_t;
+
 u8 *
 format_lb_trace (u8 * s, va_list * args)
 {
   lb_main_t *lbm = &lb_main;
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  CLIB_UNUSED(vlib_main_t * vm)
+= va_arg (*args, vlib_main_t *);
+    CLIB_UNUSED(vlib_node_t * node)
+  = va_arg (*args, vlib_node_t *);
   lb_trace_t *t = va_arg (*args, lb_trace_t *);
-  if (pool_is_free_index(lbm->vips, t->vip_index)) {
-      s = format(s, "lb vip[%d]: This VIP was freed since capture\n");
-  } else {
-      s = format(s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip, &lbm->vips[t->vip_index]);
-  }
-  if (pool_is_free_index(lbm->ass, t->as_index)) {
-      s = format(s, "lb as[%d]: This AS was freed since capture\n");
-  } else {
-      s = format(s, "lb as[%d]: %U\n", t->as_index, format_lb_as, &lbm->ass[t->as_index]);
-  }
+  if (pool_is_free_index(lbm->vips, t->vip_index))
+    {
+      s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
+    }
+  else
+    {
+      s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
+                  &lbm->vips[t->vip_index]);
+    }
+  if (pool_is_free_index(lbm->ass, t->as_index))
+    {
+      s = format (s, "lb as[%d]: This AS was freed since capture\n");
+    }
+  else
+    {
+      s = format (s, "lb as[%d]: %U\n", t->as_index, format_lb_as,
+                  &lbm->ass[t->as_index]);
+    }
   return s;
 }
 
-lb_hash_t *lb_get_sticky_table(u32 thread_index)
+u8 *
+format_lb_nat_trace (u8 * s, va_list * args)
+{
+  lb_main_t *lbm = &lb_main;
+  CLIB_UNUSED(vlib_main_t * vm)
+= va_arg (*args, vlib_main_t *);
+    CLIB_UNUSED(vlib_node_t * node)
+  = va_arg (*args, vlib_node_t *);
+  lb_nat_trace_t *t = va_arg (*args, lb_nat_trace_t *);
+
+  if (pool_is_free_index(lbm->vips, t->vip_index))
+    {
+      s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
+    }
+  else
+    {
+      s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
+                  &lbm->vips[t->vip_index]);
+    }
+  if (pool_is_free_index(lbm->ass, t->as_index))
+    {
+      s = format (s, "lb as[%d]: This AS was freed since capture\n");
+    }
+  else
+    {
+      s = format (s, "lb as[%d]: %U\n", t->as_index, format_lb_as,
+                  &lbm->ass[t->as_index]);
+    }
+  s = format (s, "lb nat: rx_sw_if_index = %d, next_index = %d",
+              t->rx_sw_if_index, t->next_index);
+
+  return s;
+}
+
+lb_hash_t *
+lb_get_sticky_table (u32 thread_index)
 {
   lb_main_t *lbm = &lb_main;
   lb_hash_t *sticky_ht = lbm->per_cpu[thread_index].sticky_ht;
   //Check if size changed
-  if (PREDICT_FALSE(sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht))))
+  if (PREDICT_FALSE(
+      sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht))))
     {
       //Dereference everything in there
       lb_hash_bucket_t *b;
       u32 i;
-      lb_hash_foreach_entry(sticky_ht, b, i) {
-	vlib_refcount_add(&lbm->as_refcount, thread_index, b->value[i], -1);
-	vlib_refcount_add(&lbm->as_refcount, thread_index, 0, 1);
-      }
+      lb_hash_foreach_entry(sticky_ht, b, i)
+        {
+          vlib_refcount_add (&lbm->as_refcount, thread_index, b->value[i], -1);
+          vlib_refcount_add (&lbm->as_refcount, thread_index, 0, 1);
+        }
 
-      lb_hash_free(sticky_ht);
+      lb_hash_free (sticky_ht);
       sticky_ht = NULL;
     }
 
   //Create if necessary
-  if (PREDICT_FALSE(sticky_ht == NULL)) {
-    lbm->per_cpu[thread_index].sticky_ht = lb_hash_alloc(lbm->per_cpu_sticky_buckets, lbm->flow_timeout);
-    sticky_ht = lbm->per_cpu[thread_index].sticky_ht;
-    clib_warning("Regenerated sticky table %p", sticky_ht);
-  }
+  if (PREDICT_FALSE(sticky_ht == NULL))
+    {
+      lbm->per_cpu[thread_index].sticky_ht = lb_hash_alloc (
+          lbm->per_cpu_sticky_buckets, lbm->flow_timeout);
+      sticky_ht = lbm->per_cpu[thread_index].sticky_ht;
+      clib_warning("Regenerated sticky table %p", sticky_ht);
+    }
 
   ASSERT(sticky_ht);
 
@@ -94,19 +162,19 @@ lb_hash_t *lb_get_sticky_table(u32 thread_index)
 }
 
 u64
-lb_node_get_other_ports4(ip4_header_t *ip40)
+lb_node_get_other_ports4 (ip4_header_t *ip40)
 {
   return 0;
 }
 
 u64
-lb_node_get_other_ports6(ip6_header_t *ip60)
+lb_node_get_other_ports6 (ip6_header_t *ip60)
 {
   return 0;
 }
 
 static_always_inline u32
-lb_node_get_hash(vlib_buffer_t *p, u8 is_input_v4)
+lb_node_get_hash (vlib_buffer_t *p, u8 is_input_v4)
 {
   u32 hash;
   if (is_input_v4)
@@ -114,347 +182,946 @@ lb_node_get_hash(vlib_buffer_t *p, u8 is_input_v4)
       ip4_header_t *ip40;
       u64 ports;
       ip40 = vlib_buffer_get_current (p);
-      if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_TCP ||
-		       ip40->protocol == IP_PROTOCOL_UDP))
-	ports = ((u64)((udp_header_t *)(ip40 + 1))->src_port << 16) |
-	  ((u64)((udp_header_t *)(ip40 + 1))->dst_port);
+      if (PREDICT_TRUE(
+          ip40->protocol == IP_PROTOCOL_TCP
+              || ip40->protocol == IP_PROTOCOL_UDP))
+        ports = ((u64) ((udp_header_t *) (ip40 + 1))->src_port << 16)
+            | ((u64) ((udp_header_t *) (ip40 + 1))->dst_port);
       else
-	ports = lb_node_get_other_ports4(ip40);
+        ports = lb_node_get_other_ports4 (ip40);
 
-      hash = lb_hash_hash(*((u64 *)&ip40->address_pair), ports,
-			  0, 0, 0);
+      hash = lb_hash_hash (*((u64 *) &ip40->address_pair), ports, 0, 0, 0);
     }
   else
     {
       ip6_header_t *ip60;
       ip60 = vlib_buffer_get_current (p);
       u64 ports;
-      if (PREDICT_TRUE (ip60->protocol == IP_PROTOCOL_TCP ||
-			ip60->protocol == IP_PROTOCOL_UDP))
-	ports = ((u64)((udp_header_t *)(ip60 + 1))->src_port << 16) |
-	((u64)((udp_header_t *)(ip60 + 1))->dst_port);
+      if (PREDICT_TRUE(
+          ip60->protocol == IP_PROTOCOL_TCP
+              || ip60->protocol == IP_PROTOCOL_UDP))
+        ports = ((u64) ((udp_header_t *) (ip60 + 1))->src_port << 16)
+            | ((u64) ((udp_header_t *) (ip60 + 1))->dst_port);
       else
-	ports = lb_node_get_other_ports6(ip60);
+        ports = lb_node_get_other_ports6 (ip60);
 
-      hash = lb_hash_hash(ip60->src_address.as_u64[0],
-			  ip60->src_address.as_u64[1],
-			  ip60->dst_address.as_u64[0],
-			  ip60->dst_address.as_u64[1],
-			  ports);
+      hash = lb_hash_hash (ip60->src_address.as_u64[0],
+                           ip60->src_address.as_u64[1],
+                           ip60->dst_address.as_u64[0],
+                           ip60->dst_address.as_u64[1], ports);
     }
   return hash;
 }
 
 static_always_inline uword
-lb_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame,
-         u8 is_input_v4, //Compile-time parameter stating that is input is v4 (or v6)
-	 lb_encap_type_t encap_type) //Compile-time parameter stating that is GRE4 or GRE6 or L3DSR
+lb_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
+            u8 is_input_v4, //Compile-time parameter stating that is input is v4 (or v6)
+            lb_encap_type_t encap_type) //Compile-time parameter is GRE4/GRE6/L3DSR/NAT4/NAT6
 {
   lb_main_t *lbm = &lb_main;
   u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
-  u32 thread_index = vlib_get_thread_index();
-  u32 lb_time = lb_hash_time_now(vm);
+  u32 thread_index = vlib_get_thread_index ();
+  u32 lb_time = lb_hash_time_now (vm);
 
-  lb_hash_t *sticky_ht = lb_get_sticky_table(thread_index);
+  lb_hash_t *sticky_ht = lb_get_sticky_table (thread_index);
   from = vlib_frame_vector_args (frame);
   n_left_from = frame->n_vectors;
   next_index = node->cached_next_index;
 
   u32 nexthash0 = 0;
   if (PREDICT_TRUE(n_left_from > 0))
-    nexthash0 = lb_node_get_hash(vlib_get_buffer (vm, from[0]), is_input_v4);
+    nexthash0 = lb_node_get_hash (vlib_get_buffer (vm, from[0]), is_input_v4);
 
   while (n_left_from > 0)
-  {
-    vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-    while (n_left_from > 0 && n_left_to_next > 0)
     {
-      u32 pi0;
-      vlib_buffer_t *p0;
-      lb_vip_t *vip0;
-      u32 asindex0;
-      u16 len0;
-      u32 available_index0;
-      u8 counter = 0;
-      u32 hash0 = nexthash0;
-
-      if (PREDICT_TRUE(n_left_from > 1))
-	{
-	  vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
-	  //Compute next hash and prefetch bucket
-	  nexthash0 = lb_node_get_hash(p1, is_input_v4);
-	  lb_hash_prefetch_bucket(sticky_ht, nexthash0);
-	  //Prefetch for encap, next
-	  CLIB_PREFETCH (vlib_buffer_get_current(p1) - 64, 64, STORE);
-	}
-
-      if (PREDICT_TRUE(n_left_from > 2))
-	{
-	  vlib_buffer_t *p2;
-	  p2 = vlib_get_buffer(vm, from[2]);
-	  /* prefetch packet header and data */
-	  vlib_prefetch_buffer_header(p2, STORE);
-	  CLIB_PREFETCH (vlib_buffer_get_current(p2), 64, STORE);
-	}
-
-      pi0 = to_next[0] = from[0];
-      from += 1;
-      n_left_from -= 1;
-      to_next += 1;
-      n_left_to_next -= 1;
-
-      p0 = vlib_get_buffer (vm, pi0);
-      vip0 = pool_elt_at_index (lbm->vips,
-				vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
-
-      if (is_input_v4)
-	{
-	  ip4_header_t *ip40;
-	  ip40 = vlib_buffer_get_current (p0);
-	  len0 = clib_net_to_host_u16(ip40->length);
-	}
-      else
-	{
-	  ip6_header_t *ip60;
-	  ip60 = vlib_buffer_get_current (p0);
-	  len0 = clib_net_to_host_u16(ip60->payload_length) + sizeof(ip6_header_t);
-	}
-
-      lb_hash_get(sticky_ht, hash0, vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-		  lb_time, &available_index0, &asindex0);
-
-      if (PREDICT_TRUE(asindex0 != ~0))
-	{
-	  //Found an existing entry
-	  counter = LB_VIP_COUNTER_NEXT_PACKET;
-	}
-      else if (PREDICT_TRUE(available_index0 != ~0))
-	{
-	  //There is an available slot for a new flow
-	  asindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
-	  counter = LB_VIP_COUNTER_FIRST_PACKET;
-	  counter = (asindex0 == 0)?LB_VIP_COUNTER_NO_SERVER:counter;
-
-	  //TODO: There are race conditions with as0 and vip0 manipulation.
-	  //Configuration may be changed, vectors resized, etc...
-
-	  //Dereference previously used
-	  vlib_refcount_add(&lbm->as_refcount, thread_index,
-			    lb_hash_available_value(sticky_ht, hash0, available_index0), -1);
-	  vlib_refcount_add(&lbm->as_refcount, thread_index,
-			    asindex0, 1);
-
-	  //Add sticky entry
-	  //Note that when there is no AS configured, an entry is configured anyway.
-	  //But no configured AS is not something that should happen
-	  lb_hash_put(sticky_ht, hash0, asindex0,
-		      vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-		      available_index0, lb_time);
-	}
-      else
-	{
-	  //Could not store new entry in the table
-	  asindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
-	  counter = LB_VIP_COUNTER_UNTRACKED_PACKET;
-	}
-
-      vlib_increment_simple_counter(&lbm->vip_counters[counter],
-				    thread_index,
-				    vnet_buffer (p0)->ip.adj_index[VLIB_TX],
-				    1);
-
-      //Now let's encap
-      if ( (encap_type == LB_ENCAP_TYPE_GRE4)
-	   || (encap_type == LB_ENCAP_TYPE_GRE6) )
+      vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+      while (n_left_from > 0 && n_left_to_next > 0)
         {
-	  gre_header_t *gre0;
-	  if (encap_type == LB_ENCAP_TYPE_GRE4) /* encap GRE4*/
-	    {
-	      ip4_header_t *ip40;
-	      vlib_buffer_advance(p0, - sizeof(ip4_header_t) - sizeof(gre_header_t));
-	      ip40 = vlib_buffer_get_current(p0);
-	      gre0 = (gre_header_t *)(ip40 + 1);
-	      ip40->src_address = lbm->ip4_src_address;
-	      ip40->dst_address = lbm->ass[asindex0].address.ip4;
-	      ip40->ip_version_and_header_length = 0x45;
-	      ip40->ttl = 128;
-	      ip40->fragment_id = 0;
-	      ip40->flags_and_fragment_offset = 0;
-	      ip40->length = clib_host_to_net_u16(len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
-	      ip40->protocol = IP_PROTOCOL_GRE;
-	      ip40->checksum = ip4_header_checksum (ip40);
-	    }
-	  else /* encap GRE6*/
-	    {
-	      ip6_header_t *ip60;
-	      vlib_buffer_advance(p0, - sizeof(ip6_header_t) - sizeof(gre_header_t));
-	      ip60 = vlib_buffer_get_current(p0);
-	      gre0 = (gre_header_t *)(ip60 + 1);
-	      ip60->dst_address = lbm->ass[asindex0].address.ip6;
-	      ip60->src_address = lbm->ip6_src_address;
-	      ip60->hop_limit = 128;
-	      ip60->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6<<28);
-	      ip60->payload_length = clib_host_to_net_u16(len0 + sizeof(gre_header_t));
-	      ip60->protocol = IP_PROTOCOL_GRE;
-	    }
-
-	  gre0->flags_and_version = 0;
-	  gre0->protocol = (is_input_v4)?
-	      clib_host_to_net_u16(0x0800):
-	      clib_host_to_net_u16(0x86DD);
-      } else if (encap_type == LB_ENCAP_TYPE_L3DSR) /* encap L3DSR*/
-	{
-	  ip4_header_t *ip40;
-	  tcp_header_t *th0;
-
-	  ip40 = vlib_buffer_get_current(p0);
-	  ip40->dst_address = lbm->ass[asindex0].address.ip4;
-	  /* Get and rewrite DSCP bit */
-          ip40->tos = (u8)((vip0->dscp & 0x3F)<<2);
-	  ip40->checksum = ip4_header_checksum (ip40);
-	  /* Recomputing L4 checksum after dst-IP modifying */
-	  th0 = ip4_next_header(ip40);
-	  th0->checksum = 0;
-	  th0->checksum = ip4_tcp_udp_compute_checksum(vm, p0, ip40);
-	}
-
-      if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
-	{
-	  lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
-	  tr->as_index = asindex0;
-	  tr->vip_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
-	}
-
-      //Enqueue to next
-      //Note that this is going to error if asindex0 == 0
-      vnet_buffer (p0)->ip.adj_index[VLIB_TX] = lbm->ass[asindex0].dpo.dpoi_index;
-      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-				       n_left_to_next, pi0,
-				       lbm->ass[asindex0].dpo.dpoi_next_node);
+          u32 pi0;
+          vlib_buffer_t *p0;
+          lb_vip_t *vip0;
+          u32 asindex0;
+          u16 len0;
+          u32 available_index0;
+          u8 counter = 0;
+          u32 hash0 = nexthash0;
+
+          if (PREDICT_TRUE(n_left_from > 1))
+            {
+              vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
+              //Compute next hash and prefetch bucket
+              nexthash0 = lb_node_get_hash (p1, is_input_v4);
+              lb_hash_prefetch_bucket (sticky_ht, nexthash0);
+              //Prefetch for encap, next
+              CLIB_PREFETCH(vlib_buffer_get_current (p1) - 64, 64, STORE);
+            }
+
+          if (PREDICT_TRUE(n_left_from > 2))
+            {
+              vlib_buffer_t *p2;
+              p2 = vlib_get_buffer (vm, from[2]);
+              /* prefetch packet header and data */
+              vlib_prefetch_buffer_header(p2, STORE);
+              CLIB_PREFETCH(vlib_buffer_get_current (p2), 64, STORE);
+            }
+
+          pi0 = to_next[0] = from[0];
+          from += 1;
+          n_left_from -= 1;
+          to_next += 1;
+          n_left_to_next -= 1;
+
+          p0 = vlib_get_buffer (vm, pi0);
+          vip0 = pool_elt_at_index(lbm->vips,
+                                   vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
+
+          if (is_input_v4)
+            {
+              ip4_header_t *ip40;
+              ip40 = vlib_buffer_get_current (p0);
+              len0 = clib_net_to_host_u16 (ip40->length);
+            }
+          else
+            {
+              ip6_header_t *ip60;
+              ip60 = vlib_buffer_get_current (p0);
+              len0 = clib_net_to_host_u16 (ip60->payload_length)
+                  + sizeof(ip6_header_t);
+            }
+
+          lb_hash_get (sticky_ht, hash0,
+                       vnet_buffer (p0)->ip.adj_index[VLIB_TX], lb_time,
+                       &available_index0, &asindex0);
+
+          if (PREDICT_TRUE(asindex0 != ~0))
+            {
+              //Found an existing entry
+              counter = LB_VIP_COUNTER_NEXT_PACKET;
+            }
+          else if (PREDICT_TRUE(available_index0 != ~0))
+            {
+              //There is an available slot for a new flow
+              asindex0 =
+                  vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
+              counter = LB_VIP_COUNTER_FIRST_PACKET;
+              counter = (asindex0 == 0) ? LB_VIP_COUNTER_NO_SERVER : counter;
+
+              //TODO: There are race conditions with as0 and vip0 manipulation.
+              //Configuration may be changed, vectors resized, etc...
+
+              //Dereference previously used
+              vlib_refcount_add (
+                  &lbm->as_refcount, thread_index,
+                  lb_hash_available_value (sticky_ht, hash0, available_index0),
+                  -1);
+              vlib_refcount_add (&lbm->as_refcount, thread_index, asindex0, 1);
+
+              //Add sticky entry
+              //Note that when there is no AS configured, an entry is configured anyway.
+              //But no configured AS is not something that should happen
+              lb_hash_put (sticky_ht, hash0, asindex0,
+              vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+                           available_index0, lb_time);
+            }
+          else
+            {
+              //Could not store new entry in the table
+              asindex0 =
+                  vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
+              counter = LB_VIP_COUNTER_UNTRACKED_PACKET;
+            }
+
+          vlib_increment_simple_counter (
+              &lbm->vip_counters[counter], thread_index,
+              vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+              1);
+
+          //Now let's encap
+          if ((encap_type == LB_ENCAP_TYPE_GRE4)
+              || (encap_type == LB_ENCAP_TYPE_GRE6))
+            {
+              gre_header_t *gre0;
+              if (encap_type == LB_ENCAP_TYPE_GRE4) /* encap GRE4*/
+                {
+                  ip4_header_t *ip40;
+                  vlib_buffer_advance (
+                      p0, -sizeof(ip4_header_t) - sizeof(gre_header_t));
+                  ip40 = vlib_buffer_get_current (p0);
+                  gre0 = (gre_header_t *) (ip40 + 1);
+                  ip40->src_address = lbm->ip4_src_address;
+                  ip40->dst_address = lbm->ass[asindex0].address.ip4;
+                  ip40->ip_version_and_header_length = 0x45;
+                  ip40->ttl = 128;
+                  ip40->fragment_id = 0;
+                  ip40->flags_and_fragment_offset = 0;
+                  ip40->length = clib_host_to_net_u16 (
+                      len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
+                  ip40->protocol = IP_PROTOCOL_GRE;
+                  ip40->checksum = ip4_header_checksum (ip40);
+                }
+              else /* encap GRE6*/
+                {
+                  ip6_header_t *ip60;
+                  vlib_buffer_advance (
+                      p0, -sizeof(ip6_header_t) - sizeof(gre_header_t));
+                  ip60 = vlib_buffer_get_current (p0);
+                  gre0 = (gre_header_t *) (ip60 + 1);
+                  ip60->dst_address = lbm->ass[asindex0].address.ip6;
+                  ip60->src_address = lbm->ip6_src_address;
+                  ip60->hop_limit = 128;
+                  ip60->ip_version_traffic_class_and_flow_label =
+                      clib_host_to_net_u32 (0x6 << 28);
+                  ip60->payload_length = clib_host_to_net_u16 (
+                      len0 + sizeof(gre_header_t));
+                  ip60->protocol = IP_PROTOCOL_GRE;
+                }
+
+              gre0->flags_and_version = 0;
+              gre0->protocol =
+                  (is_input_v4) ?
+                      clib_host_to_net_u16 (0x0800) :
+                      clib_host_to_net_u16 (0x86DD);
+            }
+          else if (encap_type == LB_ENCAP_TYPE_L3DSR) /* encap L3DSR*/
+            {
+              ip4_header_t *ip40;
+              tcp_header_t *th0;
+              ip_csum_t csum;
+              u32 old_dst;
+              u32 old_dscp;
+
+              ip40 = vlib_buffer_get_current (p0);
+              old_dst = ip40->dst_address.as_u32;
+              old_dscp = ip40->tos;
+              ip40->dst_address = lbm->ass[asindex0].address.ip4;
+              /* Get and rewrite DSCP bit */
+              ip40->tos = (u8) ((vip0->encap_args.dscp & 0x3F) << 2);
+
+              csum = ip40->checksum;
+              csum = ip_csum_sub_even (csum, old_dst);
+              csum = ip_csum_sub_even (csum, old_dscp);
+              csum = ip_csum_add_even (csum,
+                                       lbm->ass[asindex0].address.ip4.as_u32);
+              csum = ip_csum_add_even (csum, ip40->tos);
+              ip40->checksum = ip_csum_fold (csum);
+
+              /* Recomputing L4 checksum after dst-IP modifying */
+              th0 = ip4_next_header (ip40);
+              th0->checksum = 0;
+              th0->checksum = ip4_tcp_udp_compute_checksum (vm, p0, ip40);
+            }
+          else if ((encap_type == LB_ENCAP_TYPE_NAT4)
+              || (encap_type == LB_ENCAP_TYPE_NAT6))
+            {
+              ip_csum_t csum;
+              udp_header_t *uh;
+
+              /* do NAT */
+              if ((is_input_v4 == 1) && (encap_type == LB_ENCAP_TYPE_NAT4))
+                {
+                  /* NAT44 */
+                  ip4_header_t *ip40;
+                  u32 old_dst;
+                  ip40 = vlib_buffer_get_current (p0);
+                  uh = (udp_header_t *) (ip40 + 1);
+                  old_dst = ip40->dst_address.as_u32;
+                  ip40->dst_address = lbm->ass[asindex0].address.ip4;
+
+                  csum = ip40->checksum;
+                  csum = ip_csum_sub_even (csum, old_dst);
+                  csum = ip_csum_add_even (
+                      csum, lbm->ass[asindex0].address.ip4.as_u32);
+                  ip40->checksum = ip_csum_fold (csum);
+
+                  if ((ip40->protocol == IP_PROTOCOL_UDP)
+                      || (uh->dst_port == vip0->encap_args.port))
+                    {
+                      uh->dst_port = vip0->encap_args.target_port;
+                      csum = uh->checksum;
+                      csum = ip_csum_sub_even (csum, old_dst);
+                      csum = ip_csum_add_even (
+                          csum, lbm->ass[asindex0].address.ip4.as_u32);
+                      uh->checksum = ip_csum_fold (csum);
+                    }
+                  else
+                    {
+                      next_index = LB_NEXT_DROP;
+                    }
+                }
+              else if ((is_input_v4 == 0) && (encap_type == LB_ENCAP_TYPE_NAT6))
+                {
+                  /* NAT66 */
+                  ip6_header_t *ip60;
+                  ip6_address_t old_dst;
+
+                  ip60 = vlib_buffer_get_current (p0);
+                  uh = (udp_header_t *) (ip60 + 1);
+
+                  old_dst.as_u64[0] = ip60->dst_address.as_u64[0];
+                  old_dst.as_u64[1] = ip60->dst_address.as_u64[1];
+                  ip60->dst_address.as_u64[0] =
+                      lbm->ass[asindex0].address.ip6.as_u64[0];
+                  ip60->dst_address.as_u64[1] =
+                      lbm->ass[asindex0].address.ip6.as_u64[1];
+
+                  if (PREDICT_TRUE(ip60->protocol == IP_PROTOCOL_UDP))
+                    {
+                      uh->dst_port = vip0->encap_args.target_port;
+                      csum = uh->checksum;
+                      csum = ip_csum_sub_even (csum, old_dst.as_u64[0]);
+                      csum = ip_csum_sub_even (csum, old_dst.as_u64[1]);
+                      csum = ip_csum_add_even (
+                          csum, lbm->ass[asindex0].address.ip6.as_u64[0]);
+                      csum = ip_csum_add_even (
+                          csum, lbm->ass[asindex0].address.ip6.as_u64[1]);
+                      uh->checksum = ip_csum_fold (csum);
+                    }
+                  else
+                    {
+                      next_index = LB_NEXT_DROP;
+                    }
+                }
+            }
+
+          if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
+            {
+              lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof(*tr));
+              tr->as_index = asindex0;
+              tr->vip_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+            }
+
+          //Enqueue to next
+          //Note that this is going to error if asindex0 == 0
+          vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
+              lbm->ass[asindex0].dpo.dpoi_index;
+          vlib_validate_buffer_enqueue_x1(
+              vm, node, next_index, to_next, n_left_to_next, pi0,
+              lbm->ass[asindex0].dpo.dpoi_next_node);
+        }
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
     }
-    vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-  }
 
   return frame->n_vectors;
 }
 
+u8 *
+format_nodeport_lb_trace (u8 * s, va_list * args)
+{
+  lb_main_t *lbm = &lb_main;
+  CLIB_UNUSED(vlib_main_t * vm)
+= va_arg (*args, vlib_main_t *);
+    CLIB_UNUSED(vlib_node_t * node)
+  = va_arg (*args, vlib_node_t *);
+  lb_nodeport_trace_t *t = va_arg (*args, lb_nodeport_trace_t *);
+  if (pool_is_free_index(lbm->vips, t->vip_index))
+    {
+      s = format (s, "lb vip[%d]: This VIP was freed since capture\n");
+    }
+  else
+    {
+      s = format (s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip,
+                  &lbm->vips[t->vip_index]);
+    }
+
+  s = format (s, "  lb node_port: %d", t->node_port);
+
+  return s;
+}
+
 static uword
-lb6_gre6_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
+lb_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                     vlib_frame_t * frame, u8 is_input_v4)
 {
-  return lb_node_fn(vm, node, frame, 0, LB_ENCAP_TYPE_GRE6);
+  lb_main_t *lbm = &lb_main;
+  u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+        {
+          u32 pi0;
+          vlib_buffer_t *p0;
+          udp_header_t * udp_0;
+          uword * entry0;
+
+          if (PREDICT_TRUE(n_left_from > 1))
+            {
+              vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
+              //Prefetch for encap, next
+              CLIB_PREFETCH(vlib_buffer_get_current (p1) - 64, 64, STORE);
+            }
+
+          if (PREDICT_TRUE(n_left_from > 2))
+            {
+              vlib_buffer_t *p2;
+              p2 = vlib_get_buffer (vm, from[2]);
+              /* prefetch packet header and data */
+              vlib_prefetch_buffer_header(p2, STORE);
+              CLIB_PREFETCH(vlib_buffer_get_current (p2), 64, STORE);
+            }
+
+          pi0 = to_next[0] = from[0];
+          from += 1;
+          n_left_from -= 1;
+          to_next += 1;
+          n_left_to_next -= 1;
+
+          p0 = vlib_get_buffer (vm, pi0);
+
+          if (is_input_v4)
+            {
+              ip4_header_t *ip40;
+              vlib_buffer_advance (
+                  p0, -(word) (sizeof(udp_header_t) + sizeof(ip4_header_t)));
+              ip40 = vlib_buffer_get_current (p0);
+              udp_0 = (udp_header_t *) (ip40 + 1);
+            }
+          else
+            {
+              ip6_header_t *ip60;
+              vlib_buffer_advance (
+                  p0, -(word) (sizeof(udp_header_t) + sizeof(ip6_header_t)));
+              ip60 = vlib_buffer_get_current (p0);
+              udp_0 = (udp_header_t *) (ip60 + 1);
+            }
+
+          entry0 = hash_get_mem(lbm->vip_index_by_nodeport, &(udp_0->dst_port));
+
+          //Enqueue to next
+          vnet_buffer(p0)->ip.adj_index[VLIB_TX] = entry0[0];
+
+          if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED))
+            {
+              lb_nodeport_trace_t *tr = vlib_add_trace (vm, node, p0,
+                                                        sizeof(*tr));
+              tr->vip_index = entry0[0];
+              tr->node_port = (u32) clib_net_to_host_u16 (udp_0->dst_port);
+            }
+
+          vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+              n_left_to_next, pi0,
+              is_input_v4 ?
+                  LB4_NODEPORT_NEXT_IP4_NAT4 : LB6_NODEPORT_NEXT_IP6_NAT6);
+        }
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  return frame->n_vectors;
+
+}
+
+/**
+ * @brief Match NAT44 static mapping.
+ *
+ * @param sm          NAT main.
+ * @param match       Address and port to match.
+ * @param index       index to the pool.
+ *
+ * @returns 0 if match found, otherwise -1.
+ */
+int
+lb_nat44_mapping_match (lb_main_t *lbm, lb_snat4_key_t * match, u32 *index)
+{
+  clib_bihash_kv_8_8_t kv4, value;
+  clib_bihash_8_8_t *mapping_hash = &lbm->mapping_by_as4;
+
+  kv4.key = match->as_u64;
+  kv4.value = 0;
+  if (clib_bihash_search_8_8 (mapping_hash, &kv4, &value))
+    {
+      return 1;
+    }
+
+  *index = value.value;
+  return 0;
+}
+
+/**
+ * @brief Match NAT66 static mapping.
+ *
+ * @param sm          NAT main.
+ * @param match       Address and port to match.
+ * @param mapping     External or local address and port of the matched mapping.
+ *
+ * @returns 0 if match found otherwise 1.
+ */
+int
+lb_nat66_mapping_match (lb_main_t *lbm, lb_snat6_key_t * match, u32 *index)
+{
+  clib_bihash_kv_24_8_t kv6, value;
+  lb_snat6_key_t m_key6;
+  clib_bihash_24_8_t *mapping_hash = &lbm->mapping_by_as6;
+
+  m_key6.addr.as_u64[0] = match->addr.as_u64[0];
+  m_key6.addr.as_u64[1] = match->addr.as_u64[1];
+  m_key6.port = match->port;
+  m_key6.protocol = 0;
+  m_key6.fib_index = 0;
+
+  kv6.key[0] = m_key6.as_u64[0];
+  kv6.key[1] = m_key6.as_u64[1];
+  kv6.key[2] = m_key6.as_u64[2];
+  kv6.value = 0;
+  if (clib_bihash_search_24_8 (mapping_hash, &kv6, &value))
+    {
+      return 1;
+    }
+
+  *index = value.value;
+  return 0;
+}
+
+static uword
+lb_nat_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                       vlib_frame_t * frame, u32 is_nat4)
+{
+  u32 n_left_from, *from, *to_next;
+  u32 next_index;
+  u32 pkts_processed = 0;
+  lb_main_t *lbm = &lb_main;
+  u32 stats_node_index;
+
+  stats_node_index =
+      is_nat4 ? lb_nat4_in2out_node.index : lb_nat6_in2out_node.index;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+        {
+          u32 bi0;
+          vlib_buffer_t * b0;
+          u32 next0;
+          u32 sw_if_index0;
+          ip_csum_t csum;
+          u16 old_port0, new_port0;
+          udp_header_t * udp0;
+          tcp_header_t * tcp0;
+
+          u32 proto0;
+          u32 rx_fib_index0;
+
+          /* speculatively enqueue b0 to the current next frame */
+          bi0 = from[0];
+          to_next[0] = bi0;
+          from += 1;
+          to_next += 1;
+          n_left_from -= 1;
+          n_left_to_next -= 1;
+
+          b0 = vlib_get_buffer (vm, bi0);
+          next0 = LB_NAT4_IN2OUT_NEXT_LOOKUP;
+          sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+          rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (
+              sw_if_index0);
+
+          if (is_nat4)
+            {
+              ip4_header_t * ip40;
+              u32 old_addr0, new_addr0;
+              lb_snat4_key_t key40;
+              lb_snat_mapping_t *sm40;
+              u32 index40;
+
+              ip40 = vlib_buffer_get_current (b0);
+              udp0 = ip4_next_header (ip40);
+              tcp0 = (tcp_header_t *) udp0;
+              proto0 = lb_ip_proto_to_nat_proto (ip40->protocol);
+
+              key40.addr = ip40->src_address;
+              key40.protocol = proto0;
+              key40.port = udp0->src_port;
+              key40.fib_index = rx_fib_index0;
+
+              if (lb_nat44_mapping_match (lbm, &key40, &index40))
+                {
+                  next0 = LB_NAT4_IN2OUT_NEXT_DROP;
+                  goto trace0;
+                }
+
+              sm40 = pool_elt_at_index(lbm->snat_mappings, index40);
+              new_addr0 = sm40->src_ip.ip4.as_u32;
+              new_port0 = sm40->src_port;
+              vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm40->fib_index;
+              old_addr0 = ip40->src_address.as_u32;
+              ip40->src_address.as_u32 = new_addr0;
+
+              csum = ip40->checksum;
+              csum = ip_csum_sub_even (csum, old_addr0);
+              csum = ip_csum_add_even (csum, new_addr0);
+              ip40->checksum = ip_csum_fold (csum);
+
+              if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_TCP))
+                {
+                  old_port0 = tcp0->src_port;
+                  tcp0->src_port = new_port0;
+
+                  csum = tcp0->checksum;
+                  csum = ip_csum_sub_even (csum, old_addr0);
+                  csum = ip_csum_sub_even (csum, old_port0);
+                  csum = ip_csum_add_even (csum, new_addr0);
+                  csum = ip_csum_add_even (csum, new_port0);
+                  tcp0->checksum = ip_csum_fold (csum);
+                }
+              else if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_UDP))
+                {
+                  old_port0 = udp0->src_port;
+                  udp0->src_port = new_port0;
+
+                  csum = udp0->checksum;
+                  csum = ip_csum_sub_even (csum, old_addr0);
+                  csum = ip_csum_sub_even (csum, old_port0);
+                  csum = ip_csum_add_even (csum, new_addr0);
+                  csum = ip_csum_add_even (csum, new_port0);
+                  udp0->checksum = ip_csum_fold (csum);
+                }
+
+              pkts_processed += next0 != LB_NAT4_IN2OUT_NEXT_DROP;
+            }
+          else
+            {
+              ip6_header_t * ip60;
+              ip6_address_t old_addr0, new_addr0;
+              lb_snat6_key_t key60;
+              lb_snat_mapping_t *sm60;
+              u32 index60;
+
+              ip60 = vlib_buffer_get_current (b0);
+              udp0 = ip6_next_header (ip60);
+              tcp0 = (tcp_header_t *) udp0;
+              proto0 = lb_ip_proto_to_nat_proto (ip60->protocol);
+
+              key60.addr.as_u64[0] = ip60->src_address.as_u64[0];
+              key60.addr.as_u64[1] = ip60->src_address.as_u64[1];
+              key60.protocol = proto0;
+              key60.port = udp0->src_port;
+              key60.fib_index = rx_fib_index0;
+
+              if (lb_nat66_mapping_match (lbm, &key60, &index60))
+                {
+                  next0 = LB_NAT6_IN2OUT_NEXT_DROP;
+                  goto trace0;
+                }
+
+              sm60 = pool_elt_at_index(lbm->snat_mappings, index60);
+              new_addr0.as_u64[0] = sm60->src_ip.as_u64[0];
+              new_addr0.as_u64[1] = sm60->src_ip.as_u64[1];
+              new_port0 = sm60->src_port;
+              vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm60->fib_index;
+              old_addr0.as_u64[0] = ip60->src_address.as_u64[0];
+              old_addr0.as_u64[1] = ip60->src_address.as_u64[1];
+              ip60->src_address.as_u64[0] = new_addr0.as_u64[0];
+              ip60->src_address.as_u64[1] = new_addr0.as_u64[1];
+
+              if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_TCP))
+                {
+                  old_port0 = tcp0->src_port;
+                  tcp0->src_port = new_port0;
+
+                  csum = tcp0->checksum;
+                  csum = ip_csum_sub_even (csum, old_addr0.as_u64[0]);
+                  csum = ip_csum_sub_even (csum, old_addr0.as_u64[1]);
+                  csum = ip_csum_add_even (csum, new_addr0.as_u64[0]);
+                  csum = ip_csum_add_even (csum, new_addr0.as_u64[1]);
+                  csum = ip_csum_sub_even (csum, old_port0);
+                  csum = ip_csum_add_even (csum, new_port0);
+                  tcp0->checksum = ip_csum_fold (csum);
+                }
+              else if (PREDICT_TRUE(proto0 == LB_NAT_PROTOCOL_UDP))
+                {
+                  old_port0 = udp0->src_port;
+                  udp0->src_port = new_port0;
+
+                  csum = udp0->checksum;
+                  csum = ip_csum_sub_even (csum, old_addr0.as_u64[0]);
+                  csum = ip_csum_sub_even (csum, old_addr0.as_u64[1]);
+                  csum = ip_csum_add_even (csum, new_addr0.as_u64[0]);
+                  csum = ip_csum_add_even (csum, new_addr0.as_u64[1]);
+                  csum = ip_csum_sub_even (csum, old_port0);
+                  csum = ip_csum_add_even (csum, new_port0);
+                  udp0->checksum = ip_csum_fold (csum);
+                }
+
+              pkts_processed += next0 != LB_NAT4_IN2OUT_NEXT_DROP;
+            }
+
+          trace0: if (PREDICT_FALSE(
+              (node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+            {
+              lb_nat_trace_t *t = vlib_add_trace (vm, node, b0, sizeof(*t));
+              t->rx_sw_if_index = sw_if_index0;
+              t->next_index = next0;
+            }
+
+          /* verify speculative enqueue, maybe switch current next frame */
+          vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
+                                          n_left_to_next, bi0, next0);
+        }
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, stats_node_index,
+                               LB_NAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+                               pkts_processed);
+  return frame->n_vectors;
 }
 
 static uword
-lb6_gre4_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
+lb6_gre6_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
 {
-  return lb_node_fn(vm, node, frame, 0, LB_ENCAP_TYPE_GRE4);
+  return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE6);
 }
 
 static uword
-lb4_gre6_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
+lb6_gre4_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
 {
-  return lb_node_fn(vm, node, frame, 1, LB_ENCAP_TYPE_GRE6);
+  return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_GRE4);
 }
 
 static uword
-lb4_gre4_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
+lb4_gre6_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
 {
-  return lb_node_fn(vm, node, frame, 1, LB_ENCAP_TYPE_GRE4);
+  return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE6);
 }
 
 static uword
-lb4_l3dsr_node_fn (vlib_main_t * vm,
-         vlib_node_runtime_t * node, vlib_frame_t * frame)
+lb4_gre4_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
 {
-  return lb_node_fn(vm, node, frame, 1, LB_ENCAP_TYPE_L3DSR);
+  return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_GRE4);
 }
 
-VLIB_REGISTER_NODE (lb6_gre6_node) =
+static uword
+lb4_l3dsr_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                   vlib_frame_t * frame)
 {
-  .function = lb6_gre6_node_fn,
-  .name = "lb6-gre6",
-  .vector_size = sizeof (u32),
-  .format_trace = format_lb_trace,
+  return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_L3DSR);
+}
 
-  .n_errors = LB_N_ERROR,
-  .error_strings = lb_error_strings,
+static uword
+lb6_nat6_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
+{
+  return lb_node_fn (vm, node, frame, 0, LB_ENCAP_TYPE_NAT6);
+}
 
-  .n_next_nodes = LB_N_NEXT,
-  .next_nodes =
-  {
-      [LB_NEXT_DROP] = "error-drop"
-  },
-};
+static uword
+lb4_nat4_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
+{
+  return lb_node_fn (vm, node, frame, 1, LB_ENCAP_TYPE_NAT4);
+}
 
-VLIB_REGISTER_NODE (lb6_gre4_node) =
+static uword
+lb_nat4_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                        vlib_frame_t * frame)
 {
-  .function = lb6_gre4_node_fn,
-  .name = "lb6-gre4",
-  .vector_size = sizeof (u32),
-  .format_trace = format_lb_trace,
+  return lb_nat_in2out_node_fn (vm, node, frame, 1);
+}
+
+static uword
+lb_nat6_in2out_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                        vlib_frame_t * frame)
+{
+  return lb_nat_in2out_node_fn (vm, node, frame, 0);
+}
 
-  .n_errors = LB_N_ERROR,
-  .error_strings = lb_error_strings,
+VLIB_REGISTER_NODE (lb6_gre6_node) =
+  {
+    .function = lb6_gre6_node_fn,
+    .name = "lb6-gre6",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR, .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
 
-  .n_next_nodes = LB_N_NEXT,
-  .next_nodes =
+VLIB_REGISTER_NODE (lb6_gre4_node) =
   {
-      [LB_NEXT_DROP] = "error-drop"
-  },
-};
+    .function = lb6_gre4_node_fn,
+    .name = "lb6-gre4",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
 
 VLIB_REGISTER_NODE (lb4_gre6_node) =
-{
-  .function = lb4_gre6_node_fn,
-  .name = "lb4-gre6",
-  .vector_size = sizeof (u32),
-  .format_trace = format_lb_trace,
+  {
+    .function = lb4_gre6_node_fn,
+    .name = "lb4-gre6",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" }, 
+  };
+
+VLIB_REGISTER_NODE (lb4_gre4_node) =
+  {
+    .function = lb4_gre4_node_fn,
+    .name = "lb4-gre4",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT, 
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
 
-  .n_errors = LB_N_ERROR,
-  .error_strings = lb_error_strings,
+VLIB_REGISTER_NODE (lb4_l3dsr_node) =
+  {
+    .function = lb4_l3dsr_node_fn,
+    .name = "lb4-l3dsr",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
 
-  .n_next_nodes = LB_N_NEXT,
-  .next_nodes =
+VLIB_REGISTER_NODE (lb6_nat6_node) =
   {
-      [LB_NEXT_DROP] = "error-drop"
-  },
-};
+    .function = lb6_nat6_node_fn,
+    .name = "lb6-nat6",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
 
-VLIB_REGISTER_NODE (lb4_gre4_node) =
+VLIB_REGISTER_NODE (lb4_nat4_node) =
+  {
+    .function = lb4_nat4_node_fn,
+    .name = "lb4-nat4",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_N_NEXT,
+    .next_nodes =
+        { [LB_NEXT_DROP] = "error-drop" },
+  };
+
+static uword
+lb4_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                      vlib_frame_t * frame)
 {
-  .function = lb4_gre4_node_fn,
-  .name = "lb4-gre4",
-  .vector_size = sizeof (u32),
-  .format_trace = format_lb_trace,
+  return lb_nodeport_node_fn (vm, node, frame, 1);
+}
 
-  .n_errors = LB_N_ERROR,
-  .error_strings = lb_error_strings,
+static uword
+lb6_nodeport_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+                      vlib_frame_t * frame)
+{
+  return lb_nodeport_node_fn (vm, node, frame, 0);
+}
 
-  .n_next_nodes = LB_N_NEXT,
-  .next_nodes =
+VLIB_REGISTER_NODE (lb4_nodeport_node) =
   {
-      [LB_NEXT_DROP] = "error-drop"
-  },
-};
+    .function = lb4_nodeport_node_fn,
+    .name = "lb4-nodeport",
+    .vector_size = sizeof(u32),
+    .format_trace = format_nodeport_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB4_NODEPORT_N_NEXT,
+    .next_nodes =
+        {
+            [LB4_NODEPORT_NEXT_IP4_NAT4] = "lb4-nat4",
+            [LB4_NODEPORT_NEXT_DROP] = "error-drop",
+        },
+  };
 
-VLIB_REGISTER_NODE (lb4_l3dsr_node) =
-{
-  .function = lb4_l3dsr_node_fn,
-  .name = "lb4-l3dsr",
-  .vector_size = sizeof (u32),
-  .format_trace = format_lb_trace,
+VLIB_REGISTER_NODE (lb6_nodeport_node) =
+  {
+    .function = lb6_nodeport_node_fn,
+    .name = "lb6-nodeport",
+    .vector_size = sizeof(u32),
+    .format_trace = format_nodeport_lb_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB6_NODEPORT_N_NEXT,
+    .next_nodes =
+      {
+          [LB6_NODEPORT_NEXT_IP6_NAT6] = "lb6-nat6",
+          [LB6_NODEPORT_NEXT_DROP] = "error-drop",
+      },
+  };
 
-  .n_errors = LB_N_ERROR,
-  .error_strings = lb_error_strings,
+VNET_FEATURE_INIT (lb_nat4_in2out_node_fn, static) =
+  {
+    .arc_name = "ip4-unicast",
+    .node_name = "lb-nat4-in2out",
+    .runs_before =  VNET_FEATURES("ip4-lookup"),
+  };
+
+VLIB_REGISTER_NODE (lb_nat4_in2out_node) =
+  {
+    .function = lb_nat4_in2out_node_fn,
+    .name = "lb-nat4-in2out",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_nat_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_NAT4_IN2OUT_N_NEXT,
+    .next_nodes =
+      {
+          [LB_NAT4_IN2OUT_NEXT_DROP] = "error-drop",
+          [LB_NAT4_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+      },
+  };
 
-  .n_next_nodes = LB_N_NEXT,
-  .next_nodes =
+VNET_FEATURE_INIT (lb_nat6_in2out_node_fn, static) =
   {
-      [LB_NEXT_DROP] = "error-drop"
-  },
-};
+    .arc_name = "ip6-unicast",
+    .node_name = "lb-nat6-in2out",
+    .runs_before = VNET_FEATURES("ip6-lookup"),
+  };
+
+VLIB_REGISTER_NODE (lb_nat6_in2out_node) =
+  {
+    .function = lb_nat6_in2out_node_fn,
+    .name = "lb-nat6-in2out",
+    .vector_size = sizeof(u32),
+    .format_trace = format_lb_nat_trace,
+    .n_errors = LB_N_ERROR,
+    .error_strings = lb_error_strings,
+    .n_next_nodes = LB_NAT6_IN2OUT_N_NEXT,
+    .next_nodes =
+      {
+          [LB_NAT6_IN2OUT_NEXT_DROP] = "error-drop",
+          [LB_NAT6_IN2OUT_NEXT_LOOKUP] = "ip6-lookup",
+      },
+  };
+