diff --git a/scripts/ctrl-one.sh b/scripts/ctrl-one.sh
index 207d3f2..9fe8341 100755
--- a/scripts/ctrl-one.sh
+++ b/scripts/ctrl-one.sh
@@ -8,10 +8,9 @@
 
 #controller=`hostname`
 controller=$1
-switches=`ifconfig -a | grep sw |grep -v eth | awk '{print $1}'`
-
+switches=`sudo ovs-vsctl list-br`
 function host2ip (){
-   ip=`grep $1 /etc/hosts |grep -v "ip6"|  awk '{print $1}'`
+   ip=`getent hosts $1 |  awk '{print $1}' | tail -n 1`
    echo $ip
 }