digraph G {
    node [ shape=box ]
    rankdir=LR;

    label="GeoDNS\nAnswering DNS based on Source IP of the clients\nUsually different IPs per Pop"

    geodns [ label="DNS server with GeoDNS policies enabled" shape=oval ]

    subgraph cluster_pop1 {
        label="Pop 1"
        router1 [ label="Our router" ];
        upstreamrouter1 [ label="Upstream router" ];
        router1->upstreamrouter1 [ label="Announces A.B.1.D/24" ]
    }
    clients1 [ label="Client set 1" ]
    clients1->geodns [ label="Q: Where is domain example.com?" ]
    geodns->clients1 [ label="A: On an IP of Pop 1" ]
    clients1->router1 [ label="Using Pop 1 via pop specific IPs" ]

    subgraph cluster_pop2 {
        label="Pop 2"
        router2 [ label="Our router" ];
        upstreamrouter2 [ label="Upstream router" ];
        router2->upstreamrouter2 [ label="Announces A.B.2.D/24" ]
    }
    clients2 [ label="Client set 2" ]
    clients2->geodns [ label="Q: Where is domain example.com?" ]
    geodns->clients2 [ label="A: On an IP of Pop 2" ]
    clients2->router2 [ label="Using Pop 2 via pop specific IPs" ]

    subgraph cluster_pop3 {
        label="Pop 3"
        router3 [ label="Our router" ];
        upstreamrouter3 [ label="Upstream router" ];
        router3->upstreamrouter3 [ label="Announces A.B.3.D/24" ]
    }
    clients3 [ label="Client set 3" ]
    clients3->geodns [ label="Q: Where is domain example.com?" ]
    geodns->clients3 [ label="A: On an IP of Pop 3" ]
    clients3->router3 [ label="Using Pop 3 via pop specific IPs" ]



}