diff --git a/delflow.sh b/delflow.sh
new file mode 100755
index 0000000..f9ec506
--- /dev/null
+++ b/delflow.sh
@@ -0,0 +1,17 @@
+#! /bin/bash
+controller=""
+switches=`ifconfig -a | grep sw |grep -v eth | awk '{print $1}'`
+
+function host2ip (){
+   ip=`grep $1 /etc/hosts |grep -v "ip6"|  awk '{print $1}'`
+   echo $ip
+}
+
+url=""
+for c in $controller; do
+  url="$url tcp:`host2ip $c`:6633"
+done
+echo $url
+for s in $switches; do
+    sudo ovs-ofctl  del-flows  $s
+done