From f1ac568a912df647a397dc47e5842e4ab7609987 Mon Sep 17 00:00:00 2001
From: anthony <anthony@cloud.com>
Date: Thu, 5 Jul 2012 11:53:04 -0700
Subject: [PATCH] VPC : check if dns1 is null

---
 .../network/router/VirtualNetworkApplianceManagerImpl.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
index b5aed7e089b..2488c680db2 100755
--- a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
+++ b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
@@ -1717,7 +1717,9 @@ public class VirtualNetworkApplianceManagerImpl implements VirtualNetworkApplian
          * to return DNS server rather than 
          * virtual router itself. */
         if (dnsProvided || dhcpProvided) {
-            buf.append(" dns1=").append(defaultDns1);
+            if (defaultDns1 != null) {
+                buf.append(" dns1=").append(defaultDns1);
+            }
             if (defaultDns2 != null) {
                 buf.append(" dns2=").append(defaultDns2);
             }