diff --git a/server/src/com/cloud/network/NetworkManagerImpl.java b/server/src/com/cloud/network/NetworkManagerImpl.java
index 03af89be717..5e3b0df292b 100755
--- a/server/src/com/cloud/network/NetworkManagerImpl.java
+++ b/server/src/com/cloud/network/NetworkManagerImpl.java
@@ -429,7 +429,7 @@ public class NetworkManagerImpl implements NetworkManager, NetworkService, Manag
         List<PublicIp> publicIps = new ArrayList<PublicIp>();
         if (userIps != null && !userIps.isEmpty()) {
             for (IPAddressVO userIp : userIps) {
-                    PublicIp publicIp = new PublicIp(userIp, _vlanDao.findById(userIp.getVlanId()), userIp.getMacAddress());
+                    PublicIp publicIp = new PublicIp(userIp, _vlanDao.findById(userIp.getVlanId()), NetUtils.createSequenceBasedMacAddress(userIp.getMacAddress()));
                     publicIps.add(publicIp);
             }
         }
diff --git a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
index c69bc960a61..3a33efb13c2 100644
--- a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
+++ b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
@@ -1010,7 +1010,7 @@ public class VirtualNetworkApplianceManagerImpl implements VirtualNetworkApplian
             List<PublicIpAddress> publicIps = new ArrayList<PublicIpAddress>();
             if (userIps != null && !userIps.isEmpty()) {
                 for (IPAddressVO userIp : userIps) {
-                    PublicIp publicIp = new PublicIp(userIp, _vlanDao.findById(userIp.getVlanId()), userIp.getMacAddress());
+                    PublicIp publicIp = new PublicIp(userIp, _vlanDao.findById(userIp.getVlanId()), NetUtils.createSequenceBasedMacAddress(userIp.getMacAddress()));
                     publicIps.add(publicIp);
                 }
             }