diff --git a/patches/systemvm/debian/config/opt/cloud/bin/cloud-nic.sh b/patches/systemvm/debian/config/opt/cloud/bin/cloud-nic.sh
index 3f80a4ca9b8..2701ef7d1e6 100755
--- a/patches/systemvm/debian/config/opt/cloud/bin/cloud-nic.sh
+++ b/patches/systemvm/debian/config/opt/cloud/bin/cloud-nic.sh
@@ -2,9 +2,6 @@
 
 
 plug_nic() {
-  sudo iptables -t mangle -A PREROUTING -i $dev -m state --state NEW -j MARK --set-mark $tableNo 2>/dev/null
-  sudo iptables -t mangle -A PREROUTING -i $dev -m state --state NEW -j CONNMARK --save-mark 2>/dev/null
-
   sudo echo "$tableNo $tableName" >> /etc/iproute2/rt_tables 2>/dev/null
   sudo ip rule add fwmark $tableNo table $tableName 2>/dev/null
   sudo ip route flush table $tableName
@@ -13,8 +10,7 @@ plug_nic() {
 
 
 unplug_nic() {
-  sudo iptables -t mangle -D PREROUTING -i $dev -m state --state NEW -j MARK --set-mark $tableNo 2>/dev/null
-  sudo iptables -t mangle -D PREROUTING -i $dev -m state --state NEW -j CONNMARK --save-mark 2>/dev/null
+  sudo iptables -t mangle -D PREROUTING -i $dev -m state --state NEW -j CONNMARK --set-mark $tableNo 2>/dev/null
 
   sudo ip rule del fwmark $tableNo 2>/dev/null
   sudo ip route flush table $tableName
diff --git a/patches/systemvm/debian/config/opt/cloud/bin/vpc_ipassoc.sh b/patches/systemvm/debian/config/opt/cloud/bin/vpc_ipassoc.sh
index 7f137d10443..5f10abe3de4 100755
--- a/patches/systemvm/debian/config/opt/cloud/bin/vpc_ipassoc.sh
+++ b/patches/systemvm/debian/config/opt/cloud/bin/vpc_ipassoc.sh
@@ -64,6 +64,12 @@ add_an_ip () {
     sudo ip link set $ethDev up
     sudo arping -c 3 -I $ethDev -A -U -s $pubIp $pubIp
   fi
+  local tableNo=$(echo $ethDev | awk -F'eth' '{print $2}') 
+  sudo iptables-save -t mangle | grep  "PREROUTING -i $ethDev -m state --state NEW -j CONNMARK --set-mark" 2>/dev/null
+  if [ $? -gt 0 ]
+  then
+    sudo iptables -t mangle -A PREROUTING -i $ethDev -m state --state NEW -j CONNMARK --set-mark $tableNo 2>/dev/null
+  fi
   add_routing 
   return $?
 }