From 9a719cda48f1e3a70fe307f288300bebc8d7f57e Mon Sep 17 00:00:00 2001
From: Anish Narsian <44376847+anish-n@users.noreply.github.com>
Date: Wed, 17 May 2023 10:42:03 -0700
Subject: [PATCH] [arp_update] Resolve neighbors from config_db (#15006)

* To resolve NEIGH table entries present in CONFIG_DB. Without this change arp/ndp entries which we wish to resolve, and configured via CONFIG_DB are not resolved.
---
 files/scripts/arp_update | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/files/scripts/arp_update b/files/scripts/arp_update
index 2725f034668b..4b25973cfc02 100755
--- a/files/scripts/arp_update
+++ b/files/scripts/arp_update
@@ -124,8 +124,12 @@ while /bin/true; do
 
   # refresh neighbor entries from APP_DB in case of mismatch with kernel
   DBNEIGH=$(sonic-db-cli APPL_DB keys NEIGH_TABLE*)
-  KERNEIGH4=$(ip -4 neigh show | grep Vlan | cut -d ' ' -f 1,3  --output-delimiter=',')
-  KERNEIGH6=$(ip -6 neigh show | grep -v fe80 | grep Vlan | cut -d ' ' -f 1,3  --output-delimiter=',')
+
+  # resolve neighbor entries from CONFIG_DB in case of mismatch with kernel
+  DBNEIGH="$DBNEIGH $(sonic-db-cli CONFIG_DB keys NEIGH* | sed -e 's/|/:/g')"
+
+  KERNEIGH4=$(ip -4 neigh show | grep Vlan | grep -v 'FAILED\|INCOMPLETE' | cut -d ' ' -f 1,3  --output-delimiter=',')
+  KERNEIGH6=$(ip -6 neigh show | grep -v fe80 | grep Vlan | grep -v 'FAILED\|INCOMPLETE' | cut -d ' ' -f 1,3  --output-delimiter=',')
   for neigh in $DBNEIGH; do
       intf="$( cut -d ':' -f 2 <<< "$neigh" )"
       ip="$( cut -d ':' -f 3- <<< "$neigh" )"