@techreport{ietf-v6ops-framework-md-ipv6only-underlay-23,
    number =    {draft-ietf-v6ops-framework-md-ipv6only-underlay-23},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-v6ops-framework-md-ipv6only-underlay/23/},
    author =    {Chongfeng Xie and Chenhao Ma and Xing Li and Gyan Mishra and Thomas Graf},
    title =     {{Framework for Multi-domain IPv6-only Underlay Network and IPv4-as-a-Service}},
    pagetotal = 19,
    year =      2026,
    month =     may,
    day =       28,
    abstract =  {For the IPv6 transition, IPv6-only is considered the final stage where only IPv6 protocol is used for transport while maintaining global reachability for both IPv6 and IPv4 services. This document introduces a framework for a multi-domain IPv6-only underlay network from the perspective of network operators. In particular, it proposes stateless address mapping as the basis for enabling IPv4 service data transmission in a multi-domain IPv6-only environment (i.e., IPv4-as-a-Service). It describes the methodology of stateless IPv4/IPv6 mapping, illustrates the behaviors of network devices, analyzes the options of IPv6 mapping prefix allocation, and discusses the security considerations. This framework is not intended to replace existing IPv6-only technologies, but rather to leverage or remain compatible with them.},
}