IP6 link-local table

- IPv6 link local table is a per-SW interface array of IPv6 unicast FIBs
- the per-interface ocst is sizeof(fib_table_t) which is small,
  w.r.t. the cost of an interface
- FE80::/10 in the 'global' table points to a DPO that performs a lookup in the
  input interface's LL fib.

Change-Id: Ice834b25ebeeacb2e929d7c864d7ec8c09918cbe
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

22 files changed, 1068 insertions, 220 deletions

diff --git a/src/vnet/dpo/dpo.c b/src/vnet/dpo/dpo.c
index 51adbc3d55a..f4e7fab7bcd 100644
--- a/src/vnet/dpo/dpo.c
+++ b/src/vnet/dpo/dpo.c
@@ -42,6 +42,7 @@
 #include <vnet/dpo/mpls_disposition.h>
 #include <vnet/dpo/dvr_dpo.h>
 #include <vnet/dpo/l3_proxy_dpo.h>
+#include <vnet/dpo/ip6_ll_dpo.h>
 
 /**
  * Array of char* names for the DPO types and protos
@@ -533,6 +534,7 @@ dpo_module_init (vlib_main_t * vm)
     classify_dpo_module_init();
     lookup_dpo_module_init();
     ip_null_dpo_module_init();
+    ip6_ll_dpo_module_init();
     replicate_module_init();
     interface_rx_dpo_module_init();
     interface_tx_dpo_module_init();
diff --git a/src/vnet/dpo/dpo.h b/src/vnet/dpo/dpo.h
index 3290a5d239e..afee458c02f 100644
--- a/src/vnet/dpo/dpo.h
+++ b/src/vnet/dpo/dpo.h
@@ -123,6 +123,7 @@ typedef enum dpo_type_t_ {
     DPO_BIER_IMP,
     DPO_BIER_DISP_TABLE,
     DPO_BIER_DISP_ENTRY,
+    DPO_IP6_LL,
     DPO_LAST,
 } __attribute__((packed)) dpo_type_t;
 
@@ -157,6 +158,7 @@ typedef enum dpo_type_t_ {
     [DPO_BIER_IMP] = "bier-imposition",	\
     [DPO_BIER_DISP_ENTRY] = "bier-disp-entry",	\
     [DPO_BIER_DISP_TABLE] = "bier-disp-table",	\
+    [DPO_IP6_LL] = "ip6-link-local",	\
 }
 
 /**
diff --git a/src/vnet/dpo/ip6_ll_dpo.c b/src/vnet/dpo/ip6_ll_dpo.c
new file mode 100644
index 00000000000..f86472c16c5
--- /dev/null
+++ b/src/vnet/dpo/ip6_ll_dpo.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2018 Cisco 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.
+ */
+/**
+ * @brief
+ * The data-path object representing performing a lookup in the IPv6
+ * link local table
+ */
+
+#include <vnet/dpo/ip6_ll_dpo.h>
+#include <vnet/ip/ip6_ll_table.h>
+
+/**
+ * @brief the IP6 link-local DPO is global
+ */
+static dpo_id_t ip6_ll_dpo = {
+  .dpoi_type = DPO_IP6_LL,
+  .dpoi_proto = DPO_PROTO_IP6,
+  .dpoi_index = 0,
+};
+
+const dpo_id_t *
+ip6_ll_dpo_get (void)
+{
+  return (&ip6_ll_dpo);
+}
+
+static void
+ip6_ll_dpo_lock (dpo_id_t * dpo)
+{
+  /*
+   * not maintaining a lock count on the ip6_ll, they are const global and
+   * never die.
+   */
+}
+
+static void
+ip6_ll_dpo_unlock (dpo_id_t * dpo)
+{
+}
+
+static u8 *
+format_ip6_ll_dpo (u8 * s, va_list * ap)
+{
+  CLIB_UNUSED (index_t index) = va_arg (*ap, index_t);
+  CLIB_UNUSED (u32 indent) = va_arg (*ap, u32);
+
+  return (format (s, "ip6-link-local"));
+}
+
+const static dpo_vft_t ip6_ll_vft = {
+  .dv_lock = ip6_ll_dpo_lock,
+  .dv_unlock = ip6_ll_dpo_unlock,
+  .dv_format = format_ip6_ll_dpo,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a ip6_ll
+ *        object.
+ *
+ * this means that these graph nodes are ones from which a ip6_ll is the
+ * parent object in the DPO-graph.
+ */
+const static char *const ip6_null_nodes[] = {
+  "ip6-link-local",
+  NULL,
+};
+
+const static char *const *const ip6_ll_nodes[DPO_PROTO_NUM] = {
+  [DPO_PROTO_IP6] = ip6_null_nodes,
+};
+
+typedef struct ip6_ll_dpo_trace_t_
+{
+  u32 fib_index;
+  u32 sw_if_index;
+} ip6_ll_dpo_trace_t;
+
+/**
+ * @brief Exit nodes from a IP6_LL
+ */
+typedef enum ip6_ll_next_t_
+{
+  IP6_LL_NEXT_DROP,
+  IP6_LL_NEXT_LOOKUP,
+  IP6_LL_NEXT_NUM,
+} ip6_ll_next_t;
+
+always_inline uword
+ip6_ll_dpo_inline (vlib_main_t * vm,
+		   vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, next_index, *from, *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)
+    {
+      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, fib_index0, next0;
+	  vlib_buffer_t *p0;
+
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+	  next0 = IP6_LL_NEXT_LOOKUP;
+
+	  p0 = vlib_get_buffer (vm, bi0);
+
+	  /* use the packet's RX interface to pick the link-local FIB */
+	  fib_index0 =
+	    ip6_ll_fib_get (vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+	  /* write that fib index into the packet so it's used in the
+	   * lookup node next */
+	  vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
+
+	  if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      ip6_ll_dpo_trace_t *tr = vlib_add_trace (vm, node, p0,
+						       sizeof (*tr));
+	      tr->sw_if_index = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+	      tr->fib_index = fib_index0;
+	    }
+	  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);
+    }
+
+  return frame->n_vectors;
+}
+
+static u8 *
+format_ip6_ll_dpo_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 *);
+  ip6_ll_dpo_trace_t *t = va_arg (*args, ip6_ll_dpo_trace_t *);
+
+  s = format (s, "sw_if_index:%d fib_index:%d", t->sw_if_index, t->fib_index);
+  return s;
+}
+
+static uword
+ip6_ll_dpo_switch (vlib_main_t * vm,
+		   vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return (ip6_ll_dpo_inline (vm, node, frame));
+}
+
+/**
+ * @brief
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_ll_dpo_node) =
+{
+  .function = ip6_ll_dpo_switch,
+  .name = "ip6-link-local",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ip6_ll_dpo_trace,
+  .n_next_nodes = IP6_LL_NEXT_NUM,
+  .next_nodes = {
+    [IP6_LL_NEXT_DROP] = "ip6-drop",
+    [IP6_LL_NEXT_LOOKUP] = "ip6-lookup",
+  },
+};
+/* *INDENT-ON* */
+
+void
+ip6_ll_dpo_module_init (void)
+{
+  dpo_register (DPO_IP6_LL, &ip6_ll_vft, ip6_ll_nodes);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dpo/ip6_ll_dpo.h b/src/vnet/dpo/ip6_ll_dpo.h
new file mode 100644
index 00000000000..3a1fc9563e8
--- /dev/null
+++ b/src/vnet/dpo/ip6_ll_dpo.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018 Cisco 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.
+ */
+/**
+ * @brief
+ * The IP6 link-local DPO represents the lookup of a packet in the link-local
+ * IPv6 FIB
+ */
+
+#ifndef __IP6_LL_DPO_H__
+#define __IP6_LL_DPO_H__
+
+#include <vnet/dpo/dpo.h>
+
+extern const dpo_id_t *ip6_ll_dpo_get (void);
+
+extern void ip6_ll_dpo_module_init (void);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif
diff --git a/src/vnet/fib/fib_entry.h b/src/vnet/fib/fib_entry.h
index d905a839c48..3fde97add32 100644
--- a/src/vnet/fib/fib_entry.h
+++ b/src/vnet/fib/fib_entry.h
@@ -89,6 +89,10 @@ typedef enum fib_source_t_ {
      */
     FIB_SOURCE_IP6_ND_PROXY,
     /**
+     * IPv6 ND (seen in the link-local tables)
+     */
+    FIB_SOURCE_IP6_ND,
+    /**
      * Adjacency source.
      * routes created as a result of ARP/ND entries. This is lower priority
      * then the API/CLI. This is on purpose. trust me.
@@ -151,6 +155,7 @@ STATIC_ASSERT (sizeof(fib_source_t) == 1,
     [FIB_SOURCE_CLASSIFY] = "classify",			\
     [FIB_SOURCE_DHCP] = "DHCP",   			\
     [FIB_SOURCE_IP6_ND_PROXY] = "IPv6-proxy-nd",        \
+    [FIB_SOURCE_IP6_ND] = "IPv6-nd",                    \
     [FIB_SOURCE_RR] = "recursive-resolution",	        \
     [FIB_SOURCE_AE] = "attached_export",	        \
     [FIB_SOURCE_MPLS] = "mpls",           	        \
@@ -208,6 +213,10 @@ typedef enum fib_entry_attribute_t_ {
      */
     FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT,
     /**
+     * The prefix/address exempted from attached export
+     */
+    FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT,
+    /**
      * This FIB entry imposes its source information on all prefixes
      * that is covers
      */
@@ -227,6 +236,7 @@ typedef enum fib_entry_attribute_t_ {
     [FIB_ENTRY_ATTRIBUTE_LOCAL]     = "local",		\
     [FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT] = "uRPF-exempt",  \
     [FIB_ENTRY_ATTRIBUTE_MULTICAST] = "multicast",	\
+    [FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT] = "no-attached-export",	\
     [FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT] = "covered-inherit",  \
 }
 
@@ -243,6 +253,7 @@ typedef enum fib_entry_flag_t_ {
     FIB_ENTRY_FLAG_EXCLUSIVE = (1 << FIB_ENTRY_ATTRIBUTE_EXCLUSIVE),
     FIB_ENTRY_FLAG_LOCAL     = (1 << FIB_ENTRY_ATTRIBUTE_LOCAL),
     FIB_ENTRY_FLAG_IMPORT    = (1 << FIB_ENTRY_ATTRIBUTE_IMPORT),
+    FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT = (1 << FIB_ENTRY_ATTRIBUTE_NO_ATTACHED_EXPORT),
     FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT = (1 << FIB_ENTRY_ATTRIBUTE_URPF_EXEMPT),
     FIB_ENTRY_FLAG_MULTICAST = (1 << FIB_ENTRY_ATTRIBUTE_MULTICAST),
     FIB_ENTRY_FLAG_COVERED_INHERIT = (1 << FIB_ENTRY_ATTRIBUTE_COVERED_INHERIT),
diff --git a/src/vnet/fib/fib_entry_src.c b/src/vnet/fib/fib_entry_src.c
index 616d77e8b0a..6dc0c73a305 100644
--- a/src/vnet/fib/fib_entry_src.c
+++ b/src/vnet/fib/fib_entry_src.c
@@ -1352,10 +1352,7 @@ fib_route_attached_cross_table (const fib_entry_t *fib_entry,
 }
 
 /*
- * fib_route_attached_cross_table
- *
- * Return true the the route is attached via an interface that
- * is not in the same table as the route
+ * Return true if the path is attached
  */
 static inline int
 fib_path_is_attached (const fib_route_path_t *rpath)
@@ -1419,7 +1416,8 @@ fib_entry_flags_update (const fib_entry_t *fib_entry,
 	    esrc->fes_entry_flags |= FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT;
 	}
     }
-    if (fib_route_attached_cross_table(fib_entry, rpath))
+    if (fib_route_attached_cross_table(fib_entry, rpath) &&
+        !(esrc->fes_entry_flags & FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT))
     {
 	esrc->fes_entry_flags |= FIB_ENTRY_FLAG_IMPORT;
     }
diff --git a/src/vnet/fib/fib_entry_src_api.c b/src/vnet/fib/fib_entry_src_api.c
index 1cdcfbde850..4558d65d523 100644
--- a/src/vnet/fib/fib_entry_src_api.c
+++ b/src/vnet/fib/fib_entry_src_api.c
@@ -167,5 +167,6 @@ fib_entry_src_api_register (void)
     fib_entry_src_register(FIB_SOURCE_CLI, &api_src_vft);
     fib_entry_src_register(FIB_SOURCE_DHCP, &api_src_vft);
     fib_entry_src_register(FIB_SOURCE_IP6_ND_PROXY, &api_src_vft);
+    fib_entry_src_register(FIB_SOURCE_IP6_ND, &api_src_vft);
     fib_entry_src_register(FIB_SOURCE_SR, &api_src_vft);
 }
diff --git a/src/vnet/fib/fib_entry_src_special.c b/src/vnet/fib/fib_entry_src_special.c
index a2899161c8f..c976da9327a 100644
--- a/src/vnet/fib/fib_entry_src_special.c
+++ b/src/vnet/fib/fib_entry_src_special.c
@@ -52,11 +52,22 @@ fib_entry_src_special_add (fib_entry_src_t *src,
 				     dpo);
 }
 
+static void
+fib_entry_src_special_path_swap (fib_entry_src_t *src,
+                                 const fib_entry_t *entry,
+                                 fib_path_list_flags_t pl_flags,
+                                 const fib_route_path_t *rpaths)
+{
+    src->fes_pl = fib_path_list_create((FIB_PATH_LIST_FLAG_SHARED | pl_flags),
+				       rpaths);
+}
+
 const static fib_entry_src_vft_t special_src_vft = {
     .fesv_init = fib_entry_src_special_init,
     .fesv_deinit = fib_entry_src_special_deinit,
     .fesv_add = fib_entry_src_special_add,
     .fesv_remove = fib_entry_src_special_remove,
+    .fesv_path_swap = fib_entry_src_special_path_swap,
 };
 
 void
diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index c20bb255ddf..e9173484dec 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -1129,7 +1129,7 @@ fib_table_create_and_lock (fib_protocol_t proto,
 	fi = ip4_fib_table_create_and_lock(src);
         break;
     case FIB_PROTOCOL_IP6:
-	fi = ip6_fib_table_create_and_lock(src);
+	fi = ip6_fib_table_create_and_lock(src, FIB_TABLE_FLAG_NONE, NULL);
         break;
      case FIB_PROTOCOL_MPLS:
 	fi = mpls_fib_table_create_and_lock(src);
diff --git a/src/vnet/fib/fib_table.h b/src/vnet/fib/fib_table.h
index 14ac7054059..ddc00e537c2 100644
--- a/src/vnet/fib/fib_table.h
+++ b/src/vnet/fib/fib_table.h
@@ -29,6 +29,40 @@
 #define FIB_TABLE_TOTAL_LOCKS FIB_SOURCE_MAX
 
 /**
+ * Flags for the source data
+ */
+typedef enum fib_table_attribute_t_ {
+    /**
+     * Marker. Add new values after this one.
+     */
+    FIB_TABLE_ATTRIBUTE_FIRST,
+    /**
+     * the table is for IP6 link local addresses
+     */
+    FIB_TABLE_ATTRIBUTE_IP6_LL = FIB_TABLE_ATTRIBUTE_FIRST,
+    /**
+     * Marker. add new entries before this one.
+     */
+    FIB_TABLE_ATTRIBUTE_LAST = FIB_TABLE_ATTRIBUTE_IP6_LL,
+} fib_table_attribute_t;
+
+#define FIB_TABLE_ATTRIBUTE_MAX (FIB_TABLE_ATTRIBUTE_LAST+1)
+
+#define FIB_TABLE_ATTRIBUTES {		         \
+    [FIB_TABLE_ATTRIBUTE_IP6_LL]  = "ip6-ll",	 \
+}
+
+#define FOR_EACH_FIB_TABLE_ATTRIBUTE(_item)      	\
+    for (_item = FIB_TABLE_ATTRIBUTE_FIRST;		\
+	 _item < FIB_TABLE_ATTRIBUTE_MAX;		\
+	 _item++)
+
+typedef enum fib_table_flags_t_ {
+    FIB_TABLE_FLAG_NONE   = 0,
+    FIB_TABLE_FLAG_IP6_LL  = (1 << FIB_TABLE_ATTRIBUTE_IP6_LL),
+} __attribute__ ((packed)) fib_table_flags_t;
+
+/**
  * @brief 
  *   A protocol Independent FIB table
  */
@@ -40,6 +74,11 @@ typedef struct fib_table_t_
     fib_protocol_t ft_proto;
 
     /**
+     * Table flags
+     */
+    fib_table_flags_t ft_flags;
+
+    /**
      * per-source number of locks on the table
      */
     u16 ft_locks[FIB_TABLE_N_LOCKS];
diff --git a/src/vnet/fib/ip6_fib.c b/src/vnet/fib/ip6_fib.c
index 9f58e4b6a9e..fa9eb112986 100644
--- a/src/vnet/fib/ip6_fib.c
+++ b/src/vnet/fib/ip6_fib.c
@@ -15,6 +15,7 @@
 
 #include <vnet/fib/ip6_fib.h>
 #include <vnet/fib/fib_table.h>
+#include <vnet/dpo/ip6_ll_dpo.h>
 
 static void
 vnet_ip6_fib_init (u32 fib_index)
@@ -38,20 +39,23 @@ vnet_ip6_fib_init (u32 fib_index)
 				FIB_ENTRY_FLAG_DROP);
 
     /*
-     * all link local for us
+     * all link local via the link local lookup DPO
      */
     pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
     pfx.fp_addr.ip6.as_u64[1] = 0;
     pfx.fp_len = 10;
-    fib_table_entry_special_add(fib_index,
-				&pfx,
-				FIB_SOURCE_SPECIAL,
-				FIB_ENTRY_FLAG_LOCAL);
+    fib_table_entry_special_dpo_add(fib_index,
+                                    &pfx,
+                                    FIB_SOURCE_SPECIAL,
+                                    FIB_ENTRY_FLAG_NONE,
+                                    ip6_ll_dpo_get());
 }
 
 static u32
 create_fib_with_table_id (u32 table_id,
-                          fib_source_t src)
+                          fib_source_t src,
+                          fib_table_flags_t flags,
+                          u8 *desc)
 {
     fib_table_t *fib_table;
     ip6_fib_t *v6_fib;
@@ -76,6 +80,8 @@ create_fib_with_table_id (u32 table_id,
 	v6_fib->table_id =
 	    table_id;
     fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
+    fib_table->ft_flags = flags;
+    fib_table->ft_desc = desc;
 
     vnet_ip6_fib_init(fib_table->ft_index);
     fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6, src);
@@ -91,95 +97,57 @@ ip6_fib_table_find_or_create_and_lock (u32 table_id,
 
     p = hash_get (ip6_main.fib_index_by_table_id, table_id);
     if (NULL == p)
-	return create_fib_with_table_id(table_id, src);
-    
+	return create_fib_with_table_id(table_id, src,
+                                        FIB_TABLE_FLAG_NONE,
+                                        NULL);
+
     fib_table_lock(p[0], FIB_PROTOCOL_IP6, src);
 
     return (p[0]);
 }
 
 u32
-ip6_fib_table_create_and_lock (fib_source_t src)
+ip6_fib_table_create_and_lock (fib_source_t src,
+                               fib_table_flags_t flags,
+                               u8 *desc)
 {
-    return (create_fib_with_table_id(~0, src));
+    return (create_fib_with_table_id(~0, src, flags, desc));
 }
 
 void
 ip6_fib_table_destroy (u32 fib_index)
 {
+    /*
+     * all link local first ...
+     */
     fib_prefix_t pfx = {
 	.fp_proto = FIB_PROTOCOL_IP6,
-	.fp_len = 0,
+	.fp_len = 10,
 	.fp_addr = {
 	    .ip6 = {
-		{ 0, 0, },
+                .as_u8 = {
+                    [0] = 0xFE,
+                    [1] = 0x80,
+                },
 	    },
 	}
     };
+    fib_table_entry_delete(fib_index,
+                           &pfx,
+                           FIB_SOURCE_SPECIAL);
 
     /*
-     * the default route.
+     * ... then the default route.
      */
+    pfx.fp_addr.ip6.as_u64[0] = 0;
+    pfx.fp_len = 00;
     fib_table_entry_special_remove(fib_index,
 				   &pfx,
 				   FIB_SOURCE_DEFAULT_ROUTE);
 
-
-    /*
-     * ff02::1:ff00:0/104
-     */
-    ip6_set_solicited_node_multicast_address(&pfx.fp_addr.ip6, 0);
-    pfx.fp_len = 104;
-    fib_table_entry_special_remove(fib_index,
-				   &pfx,
-				   FIB_SOURCE_SPECIAL);
-
-    /*
-     * all-routers multicast address
-     */
-    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
-					IP6_MULTICAST_SCOPE_link_local,
-					IP6_MULTICAST_GROUP_ID_all_routers);
-    pfx.fp_len = 128;
-    fib_table_entry_special_remove(fib_index,
-				   &pfx,
-				   FIB_SOURCE_SPECIAL);
-
-    /*
-     * all-nodes multicast address
-     */
-    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
-					IP6_MULTICAST_SCOPE_link_local,
-					IP6_MULTICAST_GROUP_ID_all_hosts);
-    pfx.fp_len = 128;
-    fib_table_entry_special_remove(fib_index,
-				   &pfx,
-				   FIB_SOURCE_SPECIAL);
-
-    /*
-     * all-mldv2 multicast address
-     */
-    ip6_set_reserved_multicast_address (&pfx.fp_addr.ip6,
-					IP6_MULTICAST_SCOPE_link_local,
-					IP6_MULTICAST_GROUP_ID_mldv2_routers);
-    pfx.fp_len = 128;
-    fib_table_entry_special_remove(fib_index,
-				   &pfx,
-				   FIB_SOURCE_SPECIAL);
-
-    /*
-     * all link local 
-     */
-    pfx.fp_addr.ip6.as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
-    pfx.fp_addr.ip6.as_u64[1] = 0;
-    pfx.fp_len = 10;
-    fib_table_entry_special_remove(fib_index,
-				   &pfx,
-				   FIB_SOURCE_SPECIAL);
-
     fib_table_t *fib_table = fib_table_get(fib_index, FIB_PROTOCOL_IP6);
     fib_source_t source;
-    
+
      /*
      * validate no more routes.
      */
@@ -691,6 +659,8 @@ ip6_show_fib (vlib_main_t * vm,
 	    continue;
 	if (fib_index != ~0 && fib_index != (int)fib->index)
 	    continue;
+        if (fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)
+            continue;
 
 	s = format(s, "%U, fib_index:%d, flow hash:[%U] locks:[",
                    format_fib_table_name, fib->index,
diff --git a/src/vnet/fib/ip6_fib.h b/src/vnet/fib/ip6_fib.h
index dcd6c301bec..10ae75ce6f9 100644
--- a/src/vnet/fib/ip6_fib.h
+++ b/src/vnet/fib/ip6_fib.h
@@ -156,7 +156,9 @@ ip6_src_lookup_for_packet (ip6_main_t * im,
  */
 extern u32 ip6_fib_table_find_or_create_and_lock(u32 table_id,
                                                  fib_source_t src);
-extern u32 ip6_fib_table_create_and_lock(fib_source_t src);
+extern u32 ip6_fib_table_create_and_lock(fib_source_t src,
+                                         fib_table_flags_t flags,
+                                         u8* desc);
 
 extern u8 *format_ip6_fib_table_memory(u8 * s, va_list * args);
 
diff --git a/src/vnet/ip/icmp6.c b/src/vnet/ip/icmp6.c
index ab871b3a969..fd5d0ecba38 100644
--- a/src/vnet/ip/icmp6.c
+++ b/src/vnet/ip/icmp6.c
@@ -341,58 +341,14 @@ ip6_icmp_echo_request (vlib_main_t * vm,
 	  ip0->hop_limit = im->host_config.ttl;
 	  ip1->hop_limit = im->host_config.ttl;
 
-	  if (ip6_address_is_link_local_unicast (&ip0->dst_address))
-	    {
-	      ethernet_header_t *eth0;
-	      u8 tmp_mac[6];
-	      /* For link local, reuse current MAC header by sawpping
-	       *  SMAC to DMAC instead of IP6 lookup since link local
-	       *  is not in the IP6 FIB */
-	      vlib_buffer_reset (p0);
-	      eth0 = vlib_buffer_get_current (p0);
-	      clib_memcpy (tmp_mac, eth0->dst_address, 6);
-	      clib_memcpy (eth0->dst_address, eth0->src_address, 6);
-	      clib_memcpy (eth0->src_address, tmp_mac, 6);
-	      vnet_buffer (p0)->sw_if_index[VLIB_TX] =
-		vnet_buffer (p0)->sw_if_index[VLIB_RX];
-	      next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
-	    }
-	  else
-	    {
-	      /* Determine the correct lookup fib indices... */
-	      fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
-				    vnet_buffer (p0)->sw_if_index[VLIB_RX]);
-	      vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
-	    }
-
-	  if (ip6_address_is_link_local_unicast (&ip1->dst_address))
-	    {
-	      ethernet_header_t *eth1;
-	      u8 tmp_mac[6];
-	      /* For link local, reuse current MAC header by sawpping
-	       *  SMAC to DMAC instead of IP6 lookup since link local
-	       *  is not in the IP6 FIB */
-	      vlib_buffer_reset (p1);
-	      eth1 = vlib_buffer_get_current (p1);
-	      clib_memcpy (tmp_mac, eth1->dst_address, 6);
-	      clib_memcpy (eth1->dst_address, eth1->src_address, 6);
-	      clib_memcpy (eth1->src_address, tmp_mac, 6);
-	      vnet_buffer (p1)->sw_if_index[VLIB_TX] =
-		vnet_buffer (p1)->sw_if_index[VLIB_RX];
-	      next1 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
-	    }
-	  else
-	    {
-	      /* Determine the correct lookup fib indices... */
-	      fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
-				    vnet_buffer (p1)->sw_if_index[VLIB_RX]);
-	      vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
-	    }
-
-	  vnet_buffer (p0)->sw_if_index[VLIB_RX]
-	    = vnet_main.local_interface_sw_if_index;
-	  vnet_buffer (p1)->sw_if_index[VLIB_RX]
-	    = vnet_main.local_interface_sw_if_index;
+	  /* Determine the correct lookup fib indices... */
+	  fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
+				vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+	  vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
+	  /* Determine the correct lookup fib indices... */
+	  fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
+				vnet_buffer (p1)->sw_if_index[VLIB_RX]);
+	  vnet_buffer (p1)->sw_if_index[VLIB_TX] = fib_index1;
 
 	  /* verify speculative enqueues, maybe switch current next frame */
 	  /* if next0==next1==next_index then nothing special needs to be done */
@@ -441,30 +397,11 @@ ip6_icmp_echo_request (vlib_main_t * vm,
 
 	  ip0->hop_limit = im->host_config.ttl;
 
-	  if (ip6_address_is_link_local_unicast (&ip0->dst_address))
-	    {
-	      ethernet_header_t *eth0;
-	      u8 tmp_mac[6];
-	      /* For link local, reuse current MAC header by sawpping
-	       *  SMAC to DMAC instead of IP6 lookup since link local
-	       *  is not in the IP6 FIB */
-	      vlib_buffer_reset (p0);
-	      eth0 = vlib_buffer_get_current (p0);
-	      clib_memcpy (tmp_mac, eth0->dst_address, 6);
-	      clib_memcpy (eth0->dst_address, eth0->src_address, 6);
-	      clib_memcpy (eth0->src_address, tmp_mac, 6);
-	      vnet_buffer (p0)->sw_if_index[VLIB_TX] =
-		vnet_buffer (p0)->sw_if_index[VLIB_RX];
-	      next0 = ICMP6_ECHO_REQUEST_NEXT_OUTPUT;
-	    }
-	  else
-	    {
-	      fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
-				    vnet_buffer (p0)->sw_if_index[VLIB_RX]);
-	      vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
-	    }
-	  vnet_buffer (p0)->sw_if_index[VLIB_RX]
-	    = vnet_main.local_interface_sw_if_index;
+	  /* if the packet is link local, we'll bounce through the link-local
+	   * table with the RX interface correctly set */
+	  fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
+				vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+	  vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
 
 	  /* Verify speculative enqueue, maybe switch current next frame */
 	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h
index 033ecfc43b8..959d72c0fad 100644
--- a/src/vnet/ip/ip6.h
+++ b/src/vnet/ip/ip6.h
@@ -276,25 +276,36 @@ ip6_unaligned_destination_matches_route (ip6_main_t * im,
   return 1;
 }
 
+extern int ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr);
+
 always_inline int
 ip6_src_address_for_packet (ip_lookup_main_t * lm,
-			    u32 sw_if_index, ip6_address_t * src)
+			    u32 sw_if_index,
+			    const ip6_address_t * dst, ip6_address_t * src)
 {
-  u32 if_add_index = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
-  if (PREDICT_TRUE (if_add_index != ~0))
+  if (ip6_address_is_link_local_unicast (dst))
     {
-      ip_interface_address_t *if_add =
-	pool_elt_at_index (lm->if_address_pool, if_add_index);
-      ip6_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
-      *src = *if_ip;
-      return (0);
+      return ip6_get_ll_address (sw_if_index, src);
     }
   else
     {
-      src->as_u64[0] = 0;
-      src->as_u64[1] = 0;
+      u32 if_add_index =
+	lm->if_address_pool_index_by_sw_if_index[sw_if_index];
+      if (PREDICT_TRUE (if_add_index != ~0))
+	{
+	  ip_interface_address_t *if_add =
+	    pool_elt_at_index (lm->if_address_pool, if_add_index);
+	  ip6_address_t *if_ip =
+	    ip_interface_address_get_address (lm, if_add);
+	  *src = *if_ip;
+	  return (!0);
+	}
     }
-  return (!0);
+
+  src->as_u64[0] = 0;
+  src->as_u64[1] = 0;
+
+  return (0);
 }
 
 /* Find interface address which matches destination. */
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 30b717f5545..eb7667b0148 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1548,9 +1548,10 @@ ip6_discover_neighbor_inline (vlib_main_t * vm,
 	     * Choose source address based on destination lookup
 	     * adjacency.
 	     */
-	    if (ip6_src_address_for_packet (lm,
-					    sw_if_index0,
-					    &h0->ip.src_address))
+	    if (!ip6_src_address_for_packet (lm,
+					     sw_if_index0,
+					     &ip0->dst_address,
+					     &h0->ip.src_address))
 	      {
 		/* There is no address on the interface */
 		p0->error =
diff --git a/src/vnet/ip/ip6_ll_table.c b/src/vnet/ip/ip6_ll_table.c
new file mode 100644
index 00000000000..67d05ed390f
--- /dev/null
+++ b/src/vnet/ip/ip6_ll_table.c
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 2018 Cisco 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.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/dpo/drop_dpo.h>
+#include <vnet/fib/ip6_fib.h>
+
+#include <vnet/ip/ip6_ll_table.h>
+
+/**
+ * There's only one IP6 link local table
+ */
+static ip6_ll_table_t ip6_ll_table;
+
+u32
+ip6_ll_fib_get (u32 sw_if_index)
+{
+  ASSERT (vec_len (ip6_ll_table.ilt_fibs) > sw_if_index);
+
+  return (ip6_ll_table.ilt_fibs[sw_if_index]);
+}
+
+fib_node_index_t
+ip6_ll_table_lookup (const ip6_ll_prefix_t * prefix)
+{
+  return (ip6_fib_table_lookup (ip6_ll_fib_get (prefix->ilp_sw_if_index),
+				&prefix->ilp_addr, 128));
+}
+
+fib_node_index_t
+ip6_ll_table_lookup_exact_match (const ip6_ll_prefix_t * prefix)
+{
+  return (ip6_fib_table_lookup_exact_match
+	  (ip6_ll_fib_get (prefix->ilp_sw_if_index), &prefix->ilp_addr, 128));
+}
+
+static void
+ip6_ll_fib_create (u32 sw_if_index)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  u8 *desc;
+
+  desc = format (NULL, "IP6-link-local:%U",
+		 format_vnet_sw_interface_name,
+		 vnm, vnet_get_sw_interface (vnm, sw_if_index));
+
+  ip6_ll_table.ilt_fibs[sw_if_index] =
+    ip6_fib_table_create_and_lock (FIB_SOURCE_IP6_ND,
+				   FIB_TABLE_FLAG_IP6_LL, desc);
+
+  /*
+   * leave the default route as a drop, but fix fe::/10 to be a glean
+   * via the interface.
+   */
+    /* *INDENT-OFF* */
+    fib_prefix_t pfx = {
+	.fp_proto = FIB_PROTOCOL_IP6,
+	.fp_len = 10,
+	.fp_addr = {
+	    .ip6 = {
+		.as_u8 = {
+                    [0] = 0xFE,
+                    [1] = 0x80,
+                }
+	    },
+	}
+    };
+    fib_table_entry_update_one_path(
+        ip6_ll_table.ilt_fibs[sw_if_index],
+        &pfx,
+        FIB_SOURCE_SPECIAL,
+        (FIB_ENTRY_FLAG_ATTACHED |
+         FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT),
+        DPO_PROTO_IP6,
+        NULL,
+        sw_if_index,
+        ~0,
+        1,
+        NULL,
+        FIB_ROUTE_PATH_FLAG_NONE);
+    /* *INDENT-ON* */
+}
+
+static void
+ip6_ll_prefix_to_fib (const ip6_ll_prefix_t * ilp, fib_prefix_t * fp)
+{
+  fp->fp_proto = FIB_PROTOCOL_IP6;
+  fp->fp_len = 128;
+  fp->fp_addr.ip6 = ilp->ilp_addr;
+}
+
+fib_node_index_t
+ip6_ll_table_entry_update (const ip6_ll_prefix_t * ilp,
+			   fib_route_path_flags_t flags)
+{
+  fib_node_index_t ip6_ll_entry_index;
+  fib_route_path_t *rpaths, rpath = {
+    .frp_flags = flags,
+    .frp_sw_if_index = ilp->ilp_sw_if_index,
+    .frp_proto = DPO_PROTO_IP6,
+  };
+  fib_prefix_t fp;
+
+  vec_validate (ip6_ll_table.ilt_fibs, ilp->ilp_sw_if_index);
+
+  if (0 == ip6_ll_fib_get (ilp->ilp_sw_if_index))
+    {
+      ip6_ll_fib_create (ilp->ilp_sw_if_index);
+    }
+
+  rpaths = NULL;
+  vec_add1 (rpaths, rpath);
+
+  ip6_ll_prefix_to_fib (ilp, &fp);
+  ip6_ll_entry_index =
+    fib_table_entry_update (ip6_ll_fib_get (ilp->ilp_sw_if_index), &fp,
+			    FIB_SOURCE_IP6_ND,
+			    (flags & FIB_ROUTE_PATH_LOCAL ?
+			     FIB_ENTRY_FLAG_LOCAL : FIB_ENTRY_FLAG_NONE),
+			    rpaths);
+  vec_free (rpaths);
+
+  return (ip6_ll_entry_index);
+}
+
+void
+ip6_ll_table_entry_delete (const ip6_ll_prefix_t * ilp)
+{
+  fib_node_index_t ip6_ll_entry_index;
+  u32 fib_index;
+
+  ip6_ll_entry_index = ip6_ll_table_lookup_exact_match (ilp);
+
+  if (FIB_NODE_INDEX_INVALID != ip6_ll_entry_index)
+    fib_table_entry_delete_index (ip6_ll_entry_index, FIB_SOURCE_IP6_ND);
+
+  /*
+   * if there are no ND sourced prefixes left, then we can clean up this FIB
+   */
+  fib_index = ip6_ll_fib_get (ilp->ilp_sw_if_index);
+  if (0 == fib_table_get_num_entries (fib_index,
+				      FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND))
+    {
+      fib_table_unlock (fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND);
+      ip6_ll_table.ilt_fibs[ilp->ilp_sw_if_index] = 0;
+    }
+}
+
+static void
+ip6_ll_table_show_one (vlib_main_t * vm, ip6_ll_prefix_t * ilp, int detail)
+{
+  vlib_cli_output (vm, "%U",
+		   format_fib_entry,
+		   ip6_ll_table_lookup (ilp),
+		   (detail ?
+		    FIB_ENTRY_FORMAT_DETAIL2 : FIB_ENTRY_FORMAT_DETAIL));
+}
+
+typedef struct ip6_ll_show_ctx_t_
+{
+  fib_node_index_t *entries;
+} ip6_ll_show_ctx_t;
+
+static fib_table_walk_rc_t
+ip6_ll_table_show_walk (fib_node_index_t fib_entry_index, void *arg)
+{
+  ip6_ll_show_ctx_t *ctx = arg;
+
+  vec_add1 (ctx->entries, fib_entry_index);
+
+  return (FIB_TABLE_WALK_CONTINUE);
+}
+
+static void
+ip6_ll_table_show_all (vlib_main_t * vm, u32 fib_index)
+{
+  fib_node_index_t *fib_entry_index;
+  ip6_ll_show_ctx_t ctx = {
+    .entries = NULL,
+  };
+
+  fib_table_walk (fib_index, FIB_PROTOCOL_IP6, ip6_ll_table_show_walk, &ctx);
+  vec_sort_with_function (ctx.entries, fib_entry_cmp_for_sort);
+
+  vec_foreach (fib_entry_index, ctx.entries)
+  {
+    vlib_cli_output (vm, "%U",
+		     format_fib_entry,
+		     *fib_entry_index, FIB_ENTRY_FORMAT_BRIEF);
+  }
+
+  vec_free (ctx.entries);
+}
+
+typedef struct
+{
+  u32 fib_index;
+  u64 count_by_prefix_length[129];
+} count_routes_in_fib_at_prefix_length_arg_t;
+
+static void
+count_routes_in_fib_at_prefix_length (BVT (clib_bihash_kv) * kvp, void *arg)
+{
+  count_routes_in_fib_at_prefix_length_arg_t *ap = arg;
+  int mask_width;
+
+  if ((kvp->key[2] >> 32) != ap->fib_index)
+    return;
+
+  mask_width = kvp->key[2] & 0xFF;
+
+  ap->count_by_prefix_length[mask_width]++;
+}
+
+static clib_error_t *
+ip6_ll_show_fib (vlib_main_t * vm,
+		 unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca;
+  ip6_main_t *im6 = &ip6_main;
+  fib_table_t *fib_table;
+  int verbose, matching;
+  ip6_address_t matching_address;
+  u32 mask_len = 128;
+  u32 sw_if_index = ~0;
+  int detail = 0;
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 fib_index;
+
+  verbose = 1;
+  matching = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "brief") ||
+	  unformat (input, "summary") || unformat (input, "sum"))
+	verbose = 0;
+
+      else if (unformat (input, "detail") || unformat (input, "det"))
+	detail = 1;
+
+      else if (unformat (input, "%U/%d",
+			 unformat_ip6_address, &matching_address, &mask_len))
+	matching = 1;
+
+      else
+	if (unformat (input, "%U", unformat_ip6_address, &matching_address))
+	matching = 1;
+      else if (unformat (input, "%U",
+			 unformat_vnet_sw_interface, vnm, &sw_if_index))
+	;
+      else
+	break;
+    }
+
+  vec_foreach_index (sw_if_index, ip6_ll_table.ilt_fibs)
+  {
+    fib_source_t source;
+    u8 *s = NULL;
+
+    fib_index = ip6_ll_table.ilt_fibs[sw_if_index];
+
+    if (0 == fib_index)
+      continue;
+
+    fib_table = fib_table_get (fib_index, FIB_PROTOCOL_IP6);
+
+    if (!(fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL))
+      continue;
+
+    s = format (s, "%U, fib_index:%d, locks:[",
+		format_fib_table_name, fib_index,
+		FIB_PROTOCOL_IP6, fib_index);
+    FOR_EACH_FIB_SOURCE (source)
+    {
+      if (0 != fib_table->ft_locks[source])
+	{
+	  s = format (s, "%U:%d, ",
+		      format_fib_source, source, fib_table->ft_locks[source]);
+	}
+    }
+    s = format (s, "]");
+    vlib_cli_output (vm, "%v", s);
+    vec_free (s);
+
+    /* Show summary? */
+    if (!verbose)
+      {
+	BVT (clib_bihash) * h =
+	  &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash;
+	int len;
+
+	vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count");
+
+	memset (ca, 0, sizeof (*ca));
+	ca->fib_index = fib_index;
+
+	BV (clib_bihash_foreach_key_value_pair)
+	  (h, count_routes_in_fib_at_prefix_length, ca);
+
+	for (len = 128; len >= 0; len--)
+	  {
+	    if (ca->count_by_prefix_length[len])
+	      vlib_cli_output (vm, "%=20d%=16lld",
+			       len, ca->count_by_prefix_length[len]);
+	  }
+	continue;
+      }
+
+    if (!matching)
+      {
+	ip6_ll_table_show_all (vm, fib_index);
+      }
+    else
+      {
+	if (~0 == sw_if_index)
+	  {
+	    vlib_cli_output (vm, "specify the interface");
+	  }
+	else
+	  {
+	    ip6_ll_prefix_t ilp = {
+	      .ilp_addr = matching_address,
+	      .ilp_sw_if_index = sw_if_index,
+	    };
+	    ip6_ll_table_show_one (vm, &ilp, detail);
+	  }
+      }
+  };
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip6_show_fib_command, static) = {
+    .path = "show ip6-ll",
+    .short_help = "show ip6-ll [summary] [interface] [<ip6-addr>[/<width>]] [detail]",
+    .function = ip6_ll_show_fib,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+ip6_ll_module_init (vlib_main_t * vm)
+{
+  clib_error_t *error;
+
+  error = vlib_call_init_function (vm, ip6_lookup_init);
+
+  return (error);
+}
+
+VLIB_INIT_FUNCTION (ip6_ll_module_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/ip/ip6_ll_table.h b/src/vnet/ip/ip6_ll_table.h
new file mode 100644
index 00000000000..0667cf99128
--- /dev/null
+++ b/src/vnet/ip/ip6_ll_table.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2018 Cisco 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.
+ */
+
+#ifndef __IP6_LL_TABLE_H__
+#define __IP6_LL_TABLE_H__
+
+#include <vnet/ip/ip.h>
+
+#include <vnet/ip/ip6_ll_types.h>
+
+/**
+ * @brief
+ *   A protocol Independent IP multicast FIB table
+ */
+typedef struct ip6_ll_table_t_
+{
+  /**
+   * A vector, indexed by sw_if_index, of unicast IPv6 FIBs
+   */
+  u32 *ilt_fibs;
+
+  /**
+   * Total route counters
+   */
+  u32 ilt_total_route_counts;
+
+} ip6_ll_table_t;
+
+/**
+ * @brief
+ *  Perfom a longest prefix match in the non-forwarding table
+ *
+ * @param prefix
+ *  The prefix to lookup
+ *
+ * @return
+ *  The index of the fib_entry_t for the best match, which may be the default route
+ */
+extern fib_node_index_t ip6_ll_table_lookup (const ip6_ll_prefix_t * prefix);
+
+/**
+ * @brief
+ *  Perfom an exact match in the non-forwarding table
+ *
+ * @param prefix
+ *  The prefix to lookup
+ *
+ * @return
+ *  The index of the fib_entry_t for the exact match, or INVALID
+ *  is there is no match.
+ */
+extern fib_node_index_t ip6_ll_table_lookup_exact_match
+  (const ip6_ll_prefix_t * prefix);
+
+/**
+ * @brief
+ * Update an entry in the table. The falgs determine if the entry is
+ * LOCAL, in which case it's a receive, or not, in which case the entry
+ * will link to an adjacency.
+ *
+ * @param prefix
+ *  The prefix for the entry to add
+ *
+ * @return
+ *  the index of the fib_entry_t that is created (or existed already).
+ */
+extern fib_node_index_t ip6_ll_table_entry_update
+  (const ip6_ll_prefix_t * prefix, fib_route_path_flags_t flags);
+
+/**
+ * @brief
+ *  Delete a IP6 link-local entry.
+ *
+ * @param prefix
+ *  The prefix for the entry to remove
+ */
+extern void ip6_ll_table_entry_delete (const ip6_ll_prefix_t * prefix);
+
+/**
+ * @brief For use in the data plane. Get the underlying ip6 FIB
+ */
+extern u32 ip6_ll_fib_get (u32 sw_if_index);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif
diff --git a/src/vnet/ip/ip6_ll_types.c b/src/vnet/ip/ip6_ll_types.c
new file mode 100644
index 00000000000..a7ac164b05a
--- /dev/null
+++ b/src/vnet/ip/ip6_ll_types.c
@@ -0,0 +1,40 @@
+ /*
+  * Copyright (c) 2018 Cisco 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.
+  */
+
+#include <vnet/ip/ip6_ll_types.h>
+
+#include <vnet/ip/ip.h>
+
+u8 *
+format_ip6_ll_prefix (u8 * s, va_list * args)
+{
+  ip6_ll_prefix_t *ilp = va_arg (*args, ip6_ll_prefix_t *);
+  vnet_main_t *vnm = vnet_get_main ();
+
+  s = format (s, "(%U, %U)",
+	      format_ip6_address, &ilp->ilp_addr,
+	      format_vnet_sw_interface_name,
+	      vnm, vnet_get_sw_interface (vnm, ilp->ilp_sw_if_index));
+
+  return (s);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/ip/ip6_ll_types.h b/src/vnet/ip/ip6_ll_types.h
new file mode 100644
index 00000000000..3c7e100b724
--- /dev/null
+++ b/src/vnet/ip/ip6_ll_types.h
@@ -0,0 +1,47 @@
+ /*
+  * Copyright (c) 2018 Cisco 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.
+  */
+
+#ifndef __IP6_LL_TYPES_H__
+#define __IP6_LL_TYPES_H__
+
+#include <vnet/ip/ip6_packet.h>
+
+/**
+ * Aggregrate type for a prefix in the IPv6 Link-local table
+ */
+typedef struct ip6_ll_prefix_t_
+{
+  /**
+   * The interface
+   */
+  u32 ilp_sw_if_index;
+
+  /**
+   * the IP6 address
+   */
+  ip6_address_t ilp_addr;
+} ip6_ll_prefix_t;
+
+extern u8 *format_ip6_ll_prefix (u8 * s, va_list * args);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif
diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c
index 22f640c8543..d63796636b1 100644
--- a/src/vnet/ip/ip6_neighbor.c
+++ b/src/vnet/ip/ip6_neighbor.c
@@ -25,6 +25,7 @@
 #include <vnet/fib/fib_table.h>
 #include <vnet/fib/ip6_fib.h>
 #include <vnet/mfib/ip6_mfib.h>
+#include <vnet/ip/ip6_ll_table.h>
 
 /**
  * @file
@@ -273,7 +274,7 @@ format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
   u8 *flags = 0;
 
   if (!n)
-    return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
+    return format (s, "%=12s%=25s%=6s%=20s%=40s", "Time", "Address", "Flags",
 		   "Link layer", "Interface");
 
   if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
@@ -286,7 +287,7 @@ format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
     flags = format (flags, "N");
 
   si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
-  s = format (s, "%=12U%=20U%=6s%=20U%=40U",
+  s = format (s, "%=12U%=25U%=6s%=20U%=40U",
 	      format_vlib_cpu_time, vm, n->cpu_time_last_updated,
 	      format_ip6_address, &n->key.ip6_address,
 	      flags ? (char *) flags : "",
@@ -302,18 +303,29 @@ ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
 {
   if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
     {
-      fib_prefix_t pfx = {
-	.fp_len = 128,
-	.fp_proto = FIB_PROTOCOL_IP6,
-	.fp_addr.ip6 = n->key.ip6_address,
-      };
-      fib_table_entry_path_remove (fib_index,
-				   &pfx,
-				   FIB_SOURCE_ADJ,
-				   DPO_PROTO_IP6,
-				   &pfx.fp_addr,
-				   n->key.sw_if_index, ~0,
-				   1, FIB_ROUTE_PATH_FLAG_NONE);
+      if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
+	{
+	  ip6_ll_prefix_t pfx = {
+	    .ilp_addr = n->key.ip6_address,
+	    .ilp_sw_if_index = n->key.sw_if_index,
+	  };
+	  ip6_ll_table_entry_delete (&pfx);
+	}
+      else
+	{
+	  fib_prefix_t pfx = {
+	    .fp_len = 128,
+	    .fp_proto = FIB_PROTOCOL_IP6,
+	    .fp_addr.ip6 = n->key.ip6_address,
+	  };
+	  fib_table_entry_path_remove (fib_index,
+				       &pfx,
+				       FIB_SOURCE_ADJ,
+				       DPO_PROTO_IP6,
+				       &pfx.fp_addr,
+				       n->key.sw_if_index, ~0,
+				       1, FIB_ROUTE_PATH_FLAG_NONE);
+	}
     }
 }
 
@@ -640,18 +652,30 @@ ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
 static void
 ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
 {
-  fib_prefix_t pfx = {
-    .fp_len = 128,
-    .fp_proto = FIB_PROTOCOL_IP6,
-    .fp_addr.ip6 = n->key.ip6_address,
-  };
+  if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
+    {
+      ip6_ll_prefix_t pfx = {
+	.ilp_addr = n->key.ip6_address,
+	.ilp_sw_if_index = n->key.sw_if_index,
+      };
+      n->fib_entry_index =
+	ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
+    }
+  else
+    {
+      fib_prefix_t pfx = {
+	.fp_len = 128,
+	.fp_proto = FIB_PROTOCOL_IP6,
+	.fp_addr.ip6 = n->key.ip6_address,
+      };
 
-  n->fib_entry_index =
-    fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
-			      FIB_ENTRY_FLAG_ATTACHED,
-			      DPO_PROTO_IP6, &pfx.fp_addr,
-			      n->key.sw_if_index, ~0, 1, NULL,
-			      FIB_ROUTE_PATH_FLAG_NONE);
+      n->fib_entry_index =
+	fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
+				  FIB_ENTRY_FLAG_ATTACHED,
+				  DPO_PROTO_IP6, &pfx.fp_addr,
+				  n->key.sw_if_index, ~0, 1, NULL,
+				  FIB_ROUTE_PATH_FLAG_NONE);
+    }
 }
 
 int
@@ -708,9 +732,8 @@ vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
        */
       if (!is_no_fib_entry)
 	{
-	  ip6_neighbor_adj_fib_add (n,
-				    ip6_fib_table_get_index_for_sw_if_index
-				    (n->key.sw_if_index));
+	  ip6_neighbor_adj_fib_add
+	    (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
 	}
       else
 	{
@@ -1135,7 +1158,7 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 					      &h0->target_address,
 					      o0->ethernet_address,
 					      sizeof (o0->ethernet_address),
-					      0, ip6_sadd_link_local);
+					      0, 0);
 	    }
 
 	  if (is_solicitation && error0 == ICMP6_ERROR_NONE)
@@ -1153,9 +1176,18 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 		}
 	      else
 		{
-		  fei = ip6_fib_table_lookup_exact_match (fib_index,
-							  &h0->target_address,
-							  128);
+		  if (ip6_address_is_link_local_unicast (&h0->target_address))
+		    {
+		      fei = ip6_fib_table_lookup_exact_match
+			(ip6_ll_fib_get (sw_if_index0),
+			 &h0->target_address, 128);
+		    }
+		  else
+		    {
+		      fei = ip6_fib_table_lookup_exact_match (fib_index,
+							      &h0->target_address,
+							      128);
+		    }
 
 		  if (FIB_NODE_INDEX_INVALID == fei)
 		    {
@@ -1174,7 +1206,8 @@ icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
 			}
 		      else
 			if (fib_entry_is_sourced
-			    (fei, FIB_SOURCE_IP6_ND_PROXY))
+			    (fei, FIB_SOURCE_IP6_ND_PROXY) ||
+			    fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
 			{
 			  /* The address was added by IPv6 Proxy ND config.
 			   * We should only respond to these if the NS arrived on
@@ -3273,6 +3306,10 @@ show_ip6_interface_cmd (vlib_main_t * vm,
 	      vec_free (unknown_scope);
 	    }
 
+	  vlib_cli_output (vm, "\tLink-local address(es):\n");
+	  vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
+			   &radv_info->link_local_address);
+
 	  vlib_cli_output (vm, "\tJoined group address(es):\n");
 	  ip6_mldp_group_t *m;
 	  /* *INDENT-OFF* */
@@ -3395,7 +3432,6 @@ disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
   /* if not created - do nothing */
   if (ri != ~0)
     {
-      vnet_main_t *vnm = vnet_get_main ();
       ip6_radv_t *radv_info;
 
       radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
@@ -3405,14 +3441,15 @@ disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
       if (radv_info->ref_count == 0)
 	{
 	  /* essentially "disables" ipv6 on this interface */
-	  error = ip6_add_del_interface_address (vm, sw_if_index,
-						 &radv_info->
-						 link_local_address, 128,
-						 1 /* is_del */ );
-
-	  ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
-					     0 /* is_add */ );
+	  ip6_ll_prefix_t ilp = {
+	    .ilp_addr = radv_info->link_local_address,
+	    .ilp_sw_if_index = sw_if_index,
+	  };
+	  ip6_ll_table_entry_delete (&ilp);
+	  ip6_sw_interface_enable_disable (sw_if_index, 0);
 	  ip6_mfib_interface_enable_disable (sw_if_index, 0);
+	  ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
+					     0);
 	}
     }
   return error;
@@ -3499,20 +3536,20 @@ enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
 		      /* clear u bit */
 		      link_local_address.as_u8[8] &= 0xfd;
 		    }
+		  {
+		    ip6_ll_prefix_t ilp = {
+		      .ilp_addr = link_local_address,
+		      .ilp_sw_if_index = sw_if_index,
+		    };
 
-		  ip6_mfib_interface_enable_disable (sw_if_index, 1);
+		    ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
+		  }
 
 		  /* essentially "enables" ipv6 on this interface */
-		  error = ip6_add_del_interface_address (vm, sw_if_index,
-							 &link_local_address,
-							 128
-							 /* address width */ ,
-							 0 /* is_del */ );
-
-		  if (error)
-		    ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
-						       !is_add);
-		  else
+		  ip6_mfib_interface_enable_disable (sw_if_index, 1);
+		  ip6_sw_interface_enable_disable (sw_if_index, 1);
+
+		  if (!error)
 		    {
 		      radv_info->link_local_address = link_local_address;
 		    }
@@ -3523,6 +3560,27 @@ enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
   return error;
 }
 
+int
+ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
+{
+  ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+  ip6_radv_t *radv_info;
+  u32 ri;
+
+  if (vec_len (nm->if_radv_pool_index_by_sw_if_index) < sw_if_index)
+    return 0;
+
+  ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+  if (ri == ~0)
+    return 0;
+
+  radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+  *addr = radv_info->link_local_address;
+
+  return (!0);
+}
+
 static clib_error_t *
 enable_ip6_interface_cmd (vlib_main_t * vm,
 			  unformat_input_t * input, vlib_cli_command_t * cmd)
diff --git a/src/vnet/ip/ip6_packet.h b/src/vnet/ip/ip6_packet.h
index 6b724370e76..76e3c1f93f0 100644
--- a/src/vnet/ip/ip6_packet.h
+++ b/src/vnet/ip/ip6_packet.h
@@ -293,7 +293,7 @@ ip6_address_is_loopback (ip6_address_t * a)
 
 /* Check for link local unicast fe80::/10. */
 always_inline uword
-ip6_address_is_link_local_unicast (ip6_address_t * a)
+ip6_address_is_link_local_unicast (const ip6_address_t * a)
 {
   return a->as_u8[0] == 0xfe && (a->as_u8[1] & 0xc0) == 0x80;
 }
diff --git a/src/vnet/ip/ping.c b/src/vnet/ip/ping.c
index a142754bdf7..a929a0cdf00 100755
--- a/src/vnet/ip/ping.c
+++ b/src/vnet/ip/ping.c
@@ -314,13 +314,14 @@ send_ip6_ping (vlib_main_t * vm, ip6_main_t * im,
   h0->ip6.src_address = *pa6;
 
   /* Fill in the correct source now */
-  ip6_address_t *a = ip6_interface_first_address (im, sw_if_index);
-  if (!a)
+  if (!ip6_src_address_for_packet (&im->lookup_main,
+				   sw_if_index,
+				   &h0->ip6.dst_address,
+				   &h0->ip6.src_address))
     {
       vlib_buffer_free (vm, &bi0, 1);
       return SEND_PING_NO_SRC_ADDRESS;
     }
-  h0->ip6.src_address = a[0];
 
   /* Fill in icmp fields */
   h0->icmp.type = ICMP6_echo_request;