diff --git a/ui/scripts/network.js b/ui/scripts/network.js
index 6fcd46040ef..2353a038f1f 100755
--- a/ui/scripts/network.js
+++ b/ui/scripts/network.js
@@ -629,8 +629,20 @@
 										  networkdomain: args.data.networkdomain
 										});
 									} 
+                                   
+                  var oldcidr;
+                   $.ajax({
+                    url: createURL("listNetworks&id=" + args.context.networks[0].id ),
+                    dataType: "json",
+                    async: false,
+                    success: function(json) {
+                       oldcidr = json.listnetworksresponse.network[0].cidr;
+                 
+                                }
+                          });
 
-                 if(args.data.cidr !="" ){
+
+                 if(args.data.cidr !="" && args.data.cidr != oldcidr ){
                                           $.extend(data, {
                                                               guestvmcidr: args.data.cidr
                                            });