Improved tracing for the IP[46] not-enabled case.

now we get
00:00:03:665501: pg-input
 ...
00:00:03:665681: ethernet-input
 ...
00:00:03:665691: ip6-input
  UDP: 2001::1 -> ffef::1
    tos 0x00, flow label 0x0, hop limit 64, payload length 108
  UDP: 1234 -> 1234
    length 108, checksum 0x7b25
00:00:03:665695: ip6-not-enabled
    UDP: 2001::1 -> ffef::1
      tos 0x00, flow label 0x0, hop limit 64, payload length 108
    UDP: 1234 -> 1234
      length 108, checksum 0x7b25
00:00:03:665706: error-drop
  ethernet-input: no error

Same goes for IPv4

Change-Id: Ia360df39b43281d3a0aa1b686f04b73cfa37c546
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 0a30872..c1c9ec0 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -436,11 +436,11 @@
 	return;
     }
 
-  vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
+  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
 			       !is_enable, 0, 0);
 
-  vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
-			       !is_enable, 0, 0);
+  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
+			       sw_if_index, !is_enable, 0, 0);
 }
 
 /* get first interface address */
@@ -622,10 +622,10 @@
   .runs_before = VNET_FEATURES ("ip6-lookup"),
 };
 
-VNET_FEATURE_INIT (ip6_drop, static) =
+VNET_FEATURE_INIT (ip6_not_enabled, static) =
 {
   .arc_name = "ip6-unicast",
-  .node_name = "ip6-drop",
+  .node_name = "ip6-not-enabled",
   .runs_before = VNET_FEATURES ("ip6-lookup"),
 };
 
@@ -650,9 +650,9 @@
   .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
 };
 
-VNET_FEATURE_INIT (ip6_drop_mc, static) = {
+VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
   .arc_name = "ip6-multicast",
-  .node_name = "ip6-drop",
+  .node_name = "ip6-not-enabled",
   .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
 };
 
@@ -711,11 +711,11 @@
       ip6_mfib_interface_enable_disable (sw_if_index, 0);
     }
 
-  vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
+  vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
 			       is_add, 0, 0);
 
-  vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
-			       is_add, 0, 0);
+  vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
+			       sw_if_index, is_add, 0, 0);
 
   return /* no error */ 0;
 }