digraph G {
	rankdir=TB;
	labelloc=t;
	label="gtplab @ sysmocom";

	subgraph cluster_gtplab0 {
		label="gtplab0";
		rankdir=TB;
		gtplab0_172_31  [label="172.16.31.1/24"];
		tool [label="osmo-upf-load-gen",shape=box3d];
		insert_teid [label="insert return TEID\nin UDP payload",shape=note];
	}
	subgraph cluster_gtplab1 {
		label="gtplab1";
		gtplab1_172_31  [label="172.16.31.2/24"];
		gtplab1_172_32  [label="172.16.32.1/24"];

		upf_tunmap [label="UPF\ntunmap",shape=box3d];
	}
	subgraph cluster_gtplab2 {
		label="gtplab2";
		gtplab2_172_32  [label="172.16.32.2/24"];

		responder [label="osmo-udp-responder",shape=box3d];
		send_to_teid [label="use TEID from\nUDP payload",shape=note];
	}


	tool -> gtplab0_172_31 -> gtplab1_172_31 -> upf_tunmap [label="PFCP", dir=both];

	tool -> insert_teid -> gtplab0_172_31 -> gtplab1_172_31 -> upf_tunmap [label="GTP tun",style=bold];
	upf_tunmap -> gtplab1_172_32 -> gtplab2_172_32 -> responder [label="GTP tun",style=bold];

	tool -> gtplab0_172_31 -> gtplab1_172_31 -> upf_tunmap [style=dotted,dir=back];
	upf_tunmap -> gtplab1_172_32 -> gtplab2_172_32 -> send_to_teid -> responder [style=dotted,dir=back];

}