in region level vpc, let the network/tier to be created in any zone of

the region

server/src/com/cloud/network/vpc/VpcManagerImpl.java

@@ -2208,7 +2208,7 @@ public class VpcManagerImpl extends ManagerBase implements VpcManager, VpcProvis
             networkDomain = vpc.getNetworkDomain();
         }
 
-        if (vpc.getZoneId() != zoneId) {
+        if (!vpc.isRegionLevelVpc() && vpc.getZoneId() != zoneId) {
             throw new InvalidParameterValueException("New network doesn't belong to vpc zone");
         }