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

    client1 [ label="IPv6 client 1\nPublic IP" ];
    client2 [ label="IPv6 client 2\nPublic IP" ];
    clientn [ label="IPv6 client n\nPublic IP" ];

    client1->{client2, clientn};
    client2->{client1, clientn};
    clientn->{client2, client1};


}