Future<RpcResult<GetExternalTunnelInterfaceNameOutput>> result = itmManager.getExternalTunnelInterfaceName(new GetExternalTunnelInterfaceNameInputBuilder()
.setSourceDpid(srcDpId)
try {
Future<RpcResult<GetExternalTunnelInterfaceNameOutput>> result = itmManager.getExternalTunnelInterfaceName(new GetExternalTunnelInterfaceNameInputBuilder()