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

    v6lan [ label="IPv6 only hosts\n2001:db8::/120 " ]
    v4hosts [ label="IPv4 addresses\n192.0.2.0/24" ]
    v6lan->v4hosts [ label="Map 8 bits of IPv6 to IPv4" ]
    v4hosts->v6lan [ label="Map 8 bits of IPv4 to IPv6" ]

    v6lan1 [ label="2001:db8::1 " ]
    v4hosts1 [ label="192.0.2.1" ]
    v6lan1->v4hosts1 [ label="Map IPv6 address to IPv4" ]
    v4hosts1->v6lan1 [ label="Map IPv4 address to IPv6" ]

    label="Stateless NAT64 (SIIT)"
}