diff --git a/server/src/com/cloud/network/NetworkServiceImpl.java b/server/src/com/cloud/network/NetworkServiceImpl.java
index 51add2014f2..09ca75849be 100755
--- a/server/src/com/cloud/network/NetworkServiceImpl.java
+++ b/server/src/com/cloud/network/NetworkServiceImpl.java
@@ -2955,7 +2955,7 @@ public class NetworkServiceImpl extends ManagerBase implements  NetworkService {
             for (int i=0 ; i < existingRanges.size(); i++){
                 int existingStartVlan = existingRanges.get(i).first();
                 int existingEndVlan = existingRanges.get(i).second();
-                if (startVlan >= existingStartVlan && endVlan <= existingEndVlan) {
+                if (startVlan <= endVlan && startVlan >= existingStartVlan && endVlan <= existingEndVlan) {
                         exists = true;
                         break;
                     }