diff --git a/patches/systemvm/debian/config/opt/cloud/bin/vpc_func.sh b/patches/systemvm/debian/config/opt/cloud/bin/vpc_func.sh
index 17cb078b34f..2f8835120e4 100755
--- a/patches/systemvm/debian/config/opt/cloud/bin/vpc_func.sh
+++ b/patches/systemvm/debian/config/opt/cloud/bin/vpc_func.sh
@@ -22,7 +22,7 @@ getEthByIp (){
   local ip=$1
   for dev in `ls -1 /sys/class/net | grep eth`
   do
-    sudo ip addr show dev $dev | grep $ip > /dev/null
+    sudo ip addr show dev $dev | grep $ip\/ > /dev/null
     if [ $? -eq 0 ]
     then
       echo $dev