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authorJohn Lo <loj@cisco.com>2016-11-30 12:51:39 -0500
committerJohn Lo <loj@cisco.com>2016-12-01 19:34:12 +0000
commit37682e1237f83f0f84cdc4f9f92aa74d8fe3c139 (patch)
tree0ca723a11ab786245df26895365521b3f2fae11f /vnet
parent436d06b1c7d00e8c30ab055560724285a017290b (diff)
Add vxlan-bypass feature to IP4 forwarding path
Added vxlan-bypass feature which can be enabled on the underlay interface which receive VXLAN packets to accelerate VXLAN decap processing. The CLI to enable it is: set interface ip vxlan-bypass <interface> [del] With this feature enabled on an interface, there is an overhead for non-VXLAN packets at about 13 clocks per packet. The API is created to support vxlan-bypass for both VXLANoIPv4 and VXLANoIPv6. With this change, vxlan-bypass is only implemented for IPv4 forwarding path. Change-Id: Ica7239f642010b231eade7fd5009aa4b42c119d3 Signed-off-by: John Lo <loj@cisco.com>
Diffstat (limited to 'vnet')
-rw-r--r--vnet/vnet/ip/ip4.h10
-rw-r--r--vnet/vnet/ip/ip4_forward.c10
-rw-r--r--vnet/vnet/vxlan/decap.c410
-rw-r--r--vnet/vnet/vxlan/vxlan.c18
-rw-r--r--vnet/vnet/vxlan/vxlan.h5
5 files changed, 447 insertions, 6 deletions
diff --git a/vnet/vnet/ip/ip4.h b/vnet/vnet/ip/ip4.h
index 62bb5f8513c..f69f25f5d5d 100644
--- a/vnet/vnet/ip/ip4.h
+++ b/vnet/vnet/ip/ip4.h
@@ -293,4 +293,14 @@ ip4_compute_flow_hash (const ip4_header_t * ip,
return c;
}
+void
+ip4_forward_next_trace (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ vlib_rx_or_tx_t which_adj_index);
+
+u8 * format_ip4_forward_next_trace (u8 * s, va_list * args);
+
+u32 ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0);
+
#endif /* included_ip_ip4_h */
diff --git a/vnet/vnet/ip/ip4_forward.c b/vnet/vnet/ip/ip4_forward.c
index fa8ec4e644c..d6fd380815b 100644
--- a/vnet/vnet/ip/ip4_forward.c
+++ b/vnet/vnet/ip/ip4_forward.c
@@ -973,6 +973,12 @@ VNET_FEATURE_INIT (ip4_ipsec, static) = {
VNET_FEATURE_INIT (ip4_vpath, static) = {
.arc_name = "ip4-unicast",
.node_name = "vpath-input-ip4",
+ .runs_before = VNET_FEATURES ("ip4-vxlan-bypass"),
+};
+
+VNET_FEATURE_INIT (ip4_vxlan_bypass, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "ip4-vxlan-bypass",
.runs_before = VNET_FEATURES ("ip4-lookup"),
};
@@ -1143,7 +1149,7 @@ typedef struct {
u8 packet_data[64 - 1*sizeof(u32)];
} ip4_forward_next_trace_t;
-static u8 * format_ip4_forward_next_trace (u8 * s, va_list * args)
+u8 * format_ip4_forward_next_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 *);
@@ -1389,7 +1395,7 @@ ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
return sum16;
}
-static u32
+u32
ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
{
ip4_header_t * ip0 = vlib_buffer_get_current (p0);
diff --git a/vnet/vnet/vxlan/decap.c b/vnet/vnet/vxlan/decap.c
index 812a8416dc3..05565504669 100644
--- a/vnet/vnet/vxlan/decap.c
+++ b/vnet/vnet/vxlan/decap.c
@@ -52,7 +52,7 @@ always_inline uword
vxlan_input (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame,
- char is_ip4)
+ u32 is_ip4)
{
u32 n_left_from, next_index, * from, * to_next;
vxlan_main_t * vxm = &vxlan_main;
@@ -601,3 +601,411 @@ VLIB_REGISTER_NODE (vxlan6_input_node) = {
VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_input_node, vxlan6_input)
+
+typedef enum {
+ IP_VXLAN_BYPASS_NEXT_DROP,
+ IP_VXLAN_BYPASS_NEXT_VXLAN,
+ IP_VXLAN_BYPASS_N_NEXT,
+} ip_vxan_bypass_next_t;
+
+always_inline uword
+ip_vxlan_bypass_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ u32 is_ip4)
+{
+ vxlan_main_t * vxm = &vxlan_main;
+ u32 * from, * to_next, n_left_from, n_left_to_next, next_index;
+ vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index);
+ ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
+ ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+
+ if (is_ip4) addr4.data_u32 = ~0;
+ else ip6_address_set_zero (&addr6);
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ vlib_buffer_t * b0, * b1;
+ ip4_header_t * ip0, * ip1;
+ udp_header_t * udp0, * udp1;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ u32 bi1, ip_len1, udp_len1, flags1, next1;
+ i32 len_diff0, len_diff1;
+ u8 error0, good_udp0, proto0;
+ u8 error1, good_udp1, proto1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ ip0 = vlib_buffer_get_current (b0);
+ ip1 = vlib_buffer_get_current (b1);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
+ vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &next1, b1);
+
+ /* Treat IP frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol;
+ proto1 = ip4_is_fragment(ip1) ? 0xfe : ip1->protocol;
+
+ /* Process packet 0 */
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit0; /* not UDP packet */
+
+ udp0 = ip4_next_header (ip0);
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit0; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip0->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
+ goto exit0; /* no local VTEP for VXLAN packet */
+ addr4 = ip0->dst_address;
+ }
+ }
+ else goto exit0; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len0 = clib_net_to_host_u16 (ip0->length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ good_udp0 =
+ (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ exit0:
+ /* Process packet 1 */
+ if (proto1 != IP_PROTOCOL_UDP)
+ goto exit1; /* not UDP packet */
+
+ udp1 = ip4_next_header (ip1);
+ if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit1; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip1->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip1->dst_address.as_u32))
+ goto exit1; /* no local VTEP for VXLAN packet */
+ addr4 = ip1->dst_address;
+ }
+ }
+ else goto exit1; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags1 = b1->flags;
+ good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp1 |= udp1->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len1 = clib_net_to_host_u16 (ip1->length);
+ udp_len1 = clib_net_to_host_u16 (udp1->length);
+
+ len_diff1 = ip_len1 - udp_len1;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp1))
+ {
+ if (!(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
+ good_udp1 =
+ (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
+
+ next1 = error1 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b1->error = error1 ? error_node->errors[error1] : 0;
+
+ exit1:
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t * b0;
+ ip4_header_t * ip0;
+ udp_header_t * udp0;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ i32 len_diff0;
+ u8 error0, good_udp0, proto0;
+
+ bi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
+
+ /* Treat IP frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol;
+
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit; /* not UDP packet */
+
+ udp0 = ip4_next_header (ip0);
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip0->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
+ goto exit; /* no local VTEP for VXLAN packet */
+ addr4 = ip0->dst_address;
+ }
+ }
+ else goto exit; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len0 = clib_net_to_host_u16 (ip0->length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ good_udp0 =
+ (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ exit:
+ 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 uword
+ip4_vxlan_bypass (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
+}
+
+VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) = {
+ .function = ip4_vxlan_bypass,
+ .name = "ip4-vxlan-bypass",
+ .vector_size = sizeof (u32),
+
+ .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
+ .next_nodes = {
+ [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
+ [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-input",
+ },
+
+ .format_buffer = format_ip4_header,
+ .format_trace = format_ip4_forward_next_trace,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_bypass_node,ip4_vxlan_bypass)
+
+
+static clib_error_t *
+set_ip_vxlan_bypass (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, is_del;
+
+ sw_if_index = ~0;
+ is_del = 0;
+
+ if (! unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == sw_if_index)
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+
+ vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", sw_if_index,
+ is_del == 0, 0, 0);
+ done:
+ return error;
+}
+
+/*?
+ * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
+ * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0]
+ * vxlan4-input [1]
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0] ip4-input
+ * vxlan4-input [1] ip4-input-no-checksum
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabed on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ *
+ * ipv4 unicast:
+ * ip4-vxlan-bypass
+ * ip4-lookup
+ *
+ * ipv4 multicast:
+ * ip4-lookup-multicast
+ *
+ * ipv4 multicast:
+ * interface-output
+ *
+ * ipv6 unicast:
+ * ip6-lookup
+ *
+ * ipv6 multicast:
+ * ip6-lookup
+ *
+ * ipv6 multicast:
+ * interface-output
+ * @cliexend
+ *
+ * Example of how to disable unicast source checking on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
+ .path = "set interface ip vxlan-bypass",
+ .function = set_ip_vxlan_bypass,
+ .short_help = "set interface ip vxlan-bypass <interface> [del]",
+};
+
+/* Dummy init function to get us linked in. */
+clib_error_t * ip4_vxlan_bypass_init (vlib_main_t * vm)
+{ return 0; }
+
+VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init);
diff --git a/vnet/vnet/vxlan/vxlan.c b/vnet/vnet/vxlan/vxlan.c
index 3c6d7bd9714..bda0bbc968a 100644
--- a/vnet/vnet/vxlan/vxlan.c
+++ b/vnet/vnet/vxlan/vxlan.c
@@ -252,7 +252,7 @@ int vnet_vxlan_add_del_tunnel
vxlan_tunnel_t *t = 0;
vnet_main_t * vnm = vxm->vnet_main;
vnet_hw_interface_t * hi;
- uword * p;
+ uword * p, * pvtep;
u32 hw_if_index = ~0;
u32 sw_if_index = ~0;
int rv;
@@ -265,12 +265,14 @@ int vnet_vxlan_add_del_tunnel
key4.vni = clib_host_to_net_u32 (a->vni << 8);
p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64);
+ pvtep = hash_get (vxm->vtep4, a->src.ip4.as_u32);
} else {
key6.src.as_u64[0] = a->dst.ip6.as_u64[0];
key6.src.as_u64[1] = a->dst.ip6.as_u64[1];
key6.vni = clib_host_to_net_u32 (a->vni << 8);
p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6);
+ pvtep = NULL; /* ip6 vxlan-bypass not yet implemented */
}
if (a->is_add)
@@ -313,7 +315,11 @@ int vnet_vxlan_add_del_tunnel
}
if (!is_ip6)
- hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels);
+ {
+ hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels);
+ if (pvtep) pvtep[0]++;
+ else hash_set (vxm->vtep4, a->src.ip4.as_u32, 1);
+ }
else
hash_set_mem (vxm->vxlan6_tunnel_by_key, t->key6, t - vxm->tunnels);
@@ -417,7 +423,7 @@ int vnet_vxlan_add_del_tunnel
else
{
/* deleting a tunnel: tunnel must exist */
- if (!p)
+ if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
t = pool_elt_at_index (vxm->tunnels, p[0]);
@@ -444,6 +450,12 @@ int vnet_vxlan_add_del_tunnel
if (!is_ip6)
{
hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64);
+ if (pvtep)
+ {
+ pvtep[0]--;
+ if (pvtep[0] == 0)
+ hash_unset (vxm->vtep4, a->src.ip4.as_u32);
+ }
}
else
{
diff --git a/vnet/vnet/vxlan/vxlan.h b/vnet/vnet/vxlan/vxlan.h
index 28ce2a93f22..3041df27dcc 100644
--- a/vnet/vnet/vxlan/vxlan.h
+++ b/vnet/vnet/vxlan/vxlan.h
@@ -141,6 +141,11 @@ typedef struct {
uword * vxlan4_tunnel_by_key; /* keyed on ipv4.dst + vni */
uword * vxlan6_tunnel_by_key; /* keyed on ipv6.dst + vni */
+ /* local VTEP IPs used by vxlan-bypass node to check if received
+ VXLAN packet DIP matches any local VTEP address */
+ uword * vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
+ uword * vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
+
/* Free vlib hw_if_indices */
u32 * free_vxlan_tunnel_hw_if_indices;