IPv6-only networks often still depend on IPv4 subnets and ARP. This article introduces an IETF proposal to eliminate both, allowing IPv4 to operate as a service over IPv6-only infrastructure without translation or tunnelling.
Read more here: https://labs.ripe.net/author/remco-van-mook/a-farewell-to-arps-ipv4-service-on-ipv6-only-networks/
