nwdiag {

    network external {
      gateway_router[color = red];
      tenant_router1;
      tenant_router2;
    }

    group {
      color = lightgreen;
      //label = "OpenStack Deployment";
      gateway_router;
      tenant_router1;
      tenant_router2;
    }

    network isp_net1 {
      gateway_router;
      uplink_router1;
    }

    network isp_net2 {
      gateway_router;
      uplink_router2;
    }

}
