diff --git a/files/build_templates/arp_update_vars.j2 b/files/build_templates/arp_update_vars.j2
index b9315b5ebe..3cdfa81023 100644
--- a/files/build_templates/arp_update_vars.j2
+++ b/files/build_templates/arp_update_vars.j2
@@ -1,5 +1,6 @@
 {
     "interface": "{% for (name, prefix) in INTERFACE|pfx_filter %}{% if prefix|ipv6 %}{{ name }} {% endif %}{% endfor %}",
     "pc_interface" : "{% for (name, prefix) in PORTCHANNEL_INTERFACE|pfx_filter %}{% if prefix|ipv6 %}{{ name }} {% endif %}{% endfor %}",
+    "vlan_sub_interface": "{% for (name, prefix) in VLAN_SUB_INTERFACE|pfx_filter %}{% if prefix|ipv6 %}{{ name }} {% endif %}{% endfor %}",
     "vlan" : "{% if VLAN %}{{ VLAN.keys() | join(' ') }}{% endif %}"
 }
diff --git a/files/scripts/arp_update b/files/scripts/arp_update
index 2fec40c14b..1d4cf1ec54 100755
--- a/files/scripts/arp_update
+++ b/files/scripts/arp_update
@@ -14,8 +14,9 @@ while /bin/true; do
   ARP_UPDATE_VARS=$(sonic-cfggen -d -t ${ARP_UPDATE_VARS_FILE})
   INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.interface')
   PC_INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.pc_interface')
+  VLAN_SUB_INTERFACE=$(echo $ARP_UPDATE_VARS | jq -r '.vlan_sub_interface')
 
-  ALL_INTERFACE="$INTERFACE $PC_INTERFACE"
+  ALL_INTERFACE="$INTERFACE $PC_INTERFACE $VLAN_SUB_INTERFACE"
   for intf in $ALL_INTERFACE; do
       ping6cmd="ping6 -I $intf -n -q -i 0 -c 1 -W 0 ff02::1 >/dev/null"
       intf_up=$(ip link show $intf | grep "state UP")