diff --git a/scripts/ctrl-one.sh b/scripts/ctrl-one.sh
new file mode 100755
index 0000000..207d3f2
--- /dev/null
+++ b/scripts/ctrl-one.sh
@@ -0,0 +1,26 @@
+#! /bin/bash
+
+if [ "x$1" == "x" ];
+then
+    echo "No controller specified"
+    exit 1
+fi
+
+#controller=`hostname`
+controller=$1
+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
+    echo "set switch $s controller $url"
+    sudo ovs-vsctl set-controller $s $url
+done