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Sunset4 Status Pages

Sunsetting IPv4 (Concluded WG)
Int Area: Suresh Krishnan, Terry Manderson | 2012-May-01 — 2018-May-16 

2017-10-10 charter

Sunsetting IPv4 (sunset4)


 Current Status: Active

     Marc Blanchet <Marc.Blanchet@viagenie.ca>
     Wesley George <wesgeorge@puck.nether.net>

 Internet Area Directors:
     Suresh Krishnan <suresh@kaloom.com>
     Terry Manderson <terry.manderson@icann.org>

 Internet Area Advisor:
     Terry Manderson <terry.manderson@icann.org>

 Tech Advisors:
     Fred Baker <fredbaker.ietf@gmail.com>
     Martin Stiemerling <mls.ietf@gmail.com>
     Stewart Bryant <stewart.bryant@gmail.com>

 Mailing Lists:
     General Discussion: sunset4@ietf.org
     To Subscribe:       https://www.ietf.org/mailman/listinfo/sunset4
     Archive:            https://mailarchive.ietf.org/arch/browse/sunset4/

Description of Working Group:

    Global IPv4 addresses, once considered plentiful, are an
    increasingly scarce resource for many who wish to connect to the
    Internet today. IPv6 provides an abundance of freely available
    addresses, and while deployment alongside IPv4 has begun in
    earnest, much work remains.

    In order to fully transition the Internet to IPv6, individual
    applications, hosts, and networks that have enabled IPv6 must also
    be able to operate fully in the absence of IPv4. The Working Group
    will point out specific areas of concern, provide recommendations,
    and standardize protocols that facilitate the graceful "sunsetting"
    of the IPv4 Internet in areas where IPv6 has been deployed. This
    includes the act of shutting down IPv4 itself, as well as the
    ability of IPv6-only portions of the Internet to continue to
    connect with portions of the Internet that remain IPv4-only.

    While this work obviously spans multiple IETF areas including
    Internet, Operations, Transport, Applications, and Routing, this
    working group provides a single venue for the consideration of IPv4
    sunsetting. Work in this group shall never impede the deployment of
    IPv6, will not duplicate functions and capabilities already
    available in existing technologies, and should demonstrate
    widespread operational need. Cross-area coordination and support
    is essential.

    Disabling IPv4 in applications, hosts, and networks is new
    territory for much of the Internet today, and it is expected that
    problems will be uncovered including those related to basic IPv4
    functionality, interoperability, as well as potential security
    concerns. The working group will report on common issues, provide
    recommendations, and, when necessary, protocol extensions in order
    to facilitate disabling IPv4 in networks where IPv6 has been

    Operational scenarios considered by the working group shall include
    IPv6-only nodes and networks as the goal. Work on technologies that
    involve increased sharing of global IPv4 addresses should be
    limited to what is necessary for communicating with endpoints or
    over networks that are IPv6-only.

    The initial work items are:

    * NAT64 port allocation and address sharing methods involving
      scenarios where an IPv6-only node is present (and NAT44, as it
      overlaps NAT64 address sharing and port use). This may require a
      description of the use of an existing protocol, the development
      of extensions to an existing protocol, or the definition of an
      entirely new protocol.

    * Gap analysis of IPv4/IPv6 features to facilitate IPv4 sunsetting

    * Provisioning methods to signal a dual-stack host to disable or
      depreference the use of IPv4

Goals and Milestones:
  Dec 2015 - Submit gap analysis on IPv4 sunsetting to IESG for consideration as an Informational RFC
  Dec 2015 - Submit NAT64 port allocation and address sharing methods to IESG for consideration as an Informational RFC
  Apr 2016 - Submit provisioning methods to signal a dual-stack host to disable the use of IPv4 to IESG for consideration as Proposed Standard
  Jul 2017 - IPv6 Support Within IETF work

All charter page changes, including changes to draft-list, rfc-list and milestones:

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