ungleich-graphviz/cdn-anycast.dot

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digraph G {
node [ shape=box ]
rankdir=LR;
label="Anycasting\nAll locations announce same IPs\nRouting based traffic shaping"
internet [ label="The internet" shape=oval ]
internet->upstreamrouter1 [ label="Forward traffic for A.B.C.D/24" ]
internet->upstreamrouter2 [ label="Forward traffic for A.B.C.D/24" ]
internet->upstreamrouter3 [ label="Forward traffic for A.B.C.D/24" ]
subgraph cluster_pop1 {
label="PoP 1"
router1 [ label="Our router" ];
upstreamrouter1 [ label="Upstream router" ];
router1->upstreamrouter1 [ label="Announces A.B.C.D/24" ]
}
clients1 [ label="Client set 1" ]
clients1->internet [ label="Access via Internet" ]
clients1->router1 [ label="Using PoP 1\nGeographic location not guaranteed to be nearest" style=dashed ]
subgraph cluster_pop2 {
label="PoP 2"
router2 [ label="Our router" ];
upstreamrouter2 [ label="Upstream router" ];
router2->upstreamrouter2 [ label="Announces A.B.C.D/24" ]
}
clients2 [ label="Client set 2" ]
clients2->internet [ label="Access via Internet" ]
clients2->router2 [ label="Using PoP 2\nGeographic location not guaranteed to be nearest" style=dashed ]
subgraph cluster_pop3 {
label="PoP 3"
router3 [ label="Our router" ];
upstreamrouter3 [ label="Upstream router" ];
router3->upstreamrouter3 [ label="Announces A.B.C.D/24" ]
}
clients3 [ label="Client set 3" ]
clients3->internet [ label="Access via Internet" ]
clients3->router3 [ label="Using PoP 3\nGeographic location not guaranteed to be nearest" style=dashed ]
}