diff --git a/patches/systemvm/debian/config/etc/init.d/cloud-early-config b/patches/systemvm/debian/config/etc/init.d/cloud-early-config
index f93c39d81e8..5835c4dde1b 100755
--- a/patches/systemvm/debian/config/etc/init.d/cloud-early-config
+++ b/patches/systemvm/debian/config/etc/init.d/cloud-early-config
@@ -544,7 +544,14 @@ setup_dnsmasq() {
   [ $ETH0_IP ] && echo "dhcp-option=6,$NS" >> /etc/dnsmasq.conf
   [ $ETH0_IP6 ] && echo "dhcp-option=option6:dns-server,$NS6" >> /etc/dnsmasq.conf
 #adding the name data-server to the /etc/hosts for allowing the access to user-data service and ssh-key reset in every subnet.
-  echo "$ETH0_IP data-server" >> /etc/hosts
+  if [ -n "$ETH0_IP" ]
+          then
+           echo "$ETH0_IP data-server" >> /etc/hosts
+  fi
+  if [ -n "$ETH0_IP6" ]
+      then
+       echo "$ETH0_IP6 data-server" >> /etc/hosts
+  fi
 }
 
 setup_sshd(){
diff --git a/server/src/com/cloud/configuration/ConfigurationManagerImpl.java b/server/src/com/cloud/configuration/ConfigurationManagerImpl.java
index fd170bd850f..bdb526089b2 100755
--- a/server/src/com/cloud/configuration/ConfigurationManagerImpl.java
+++ b/server/src/com/cloud/configuration/ConfigurationManagerImpl.java
@@ -2831,6 +2831,7 @@ public class ConfigurationManagerImpl extends ManagerBase implements Configurati
                     ip6Gateway = network.getIp6Gateway();
                     ip6Cidr = network.getIp6Cidr();
                     _networkModel.checkIp6Parameters(startIPv6, endIPv6, ip6Gateway, ip6Cidr);
+                    sameSubnet = true;
                 }
             }
         }
@@ -2846,7 +2847,7 @@ public class ConfigurationManagerImpl extends ManagerBase implements Configurati
             vlanDetails = new Pair<String, String>(newVlanGateway, newVlanNetmask);
         }
         // check if the gatewayip is the part of the ip range being added.
-        if (NetUtils.ipRangesOverlap(startIP, endIP, vlanDetails.first(), vlanDetails.first())) {
+        if (ipv4 && NetUtils.ipRangesOverlap(startIP, endIP, vlanDetails.first(), vlanDetails.first())) {
             throw new InvalidParameterValueException(
                     "The gateway ip should not be the part of the ip range being added.");
         }
diff --git a/server/src/com/cloud/network/NetworkManagerImpl.java b/server/src/com/cloud/network/NetworkManagerImpl.java
index f6e9a0ae56f..0e8011962b0 100755
--- a/server/src/com/cloud/network/NetworkManagerImpl.java
+++ b/server/src/com/cloud/network/NetworkManagerImpl.java
@@ -2004,8 +2004,10 @@ public class NetworkManagerImpl extends ManagerBase implements NetworkManager, L
                     _networkModel.isProviderSupportServiceInNetwork(network.getId(), Service.Dhcp, element.getProvider()) &&
                     element instanceof DhcpServiceProvider) {
                 DhcpServiceProvider sp = (DhcpServiceProvider) element;
-                if (!sp.configDhcpSupportForSubnet(network, profile, vmProfile, dest, context)) {
-                     return false;
+                if (profile.getIp6Address() == null) {
+                    if (!sp.configDhcpSupportForSubnet(network, profile, vmProfile, dest, context)) {
+                        return false;
+                    }
                 }
                 sp.addDhcpEntry(network, profile, vmProfile, dest, context);
             }