Github user jburwell commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/801#discussion_r39903296
  
    --- Diff: 
plugins/network-elements/nuage-vsp/src/com/cloud/network/guru/NuageVspGuestNetworkGuru.java
 ---
    @@ -358,19 +441,22 @@ private String getVirtualRouterIP(Network network, 
Collection<String> addressRan
             Set<Long> allIPsInCidr = NetUtils.getAllIpsFromCidr(subnet, 
cidrSize, new HashSet<Long>());
     
             if (allIPsInCidr.size() > 3) {
    +            //get the second IP and see if it the networks GatewayIP
                 Iterator<Long> ipIterator = allIPsInCidr.iterator();
                 long vip = ipIterator.next();
    --- End diff --
    
    This logic appears to assume element order on a ``Set`` which provides no 
guarantees regarding the ordering of elements.


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