I-D Action: draft-ietf-6man-rfc6724-update-23.txt

Internet-Draft draft-ietf-6man-rfc6724-update-23.txt is now available. It is a
work item of the IPv6 Maintenance (6MAN) WG of the IETF.

   Title:   Prioritizing known-local IPv6 ULAs through address selection policy
   Authors: Nick Buraglio
            Tim Chown
            Jeremy Duncan
   Name:    draft-ietf-6man-rfc6724-update-23.txt
   Pages:   21
   Dates:   2025-07-07

Abstract:

   This document updates the default address selection algorithm for
   Internet Protocol Version 6 (IPv6), originally specified in RFC 6724,
   based on accumulated operational experience.  It introduces the
   concept of "known-local" Unique Local Address (ULA) prefixes within
   the fd00::/8 block and specifies that ULA-to-ULA communications using
   such prefixes should be preferred over both IPv4-to-IPv4 and GUA-to-
   GUA (Global Unicast Address) communications in local use scenarios.
   The document defines mechanisms for nodes to identify and incorporate
   known-local prefixes into their address selection policy tables.  It
   further clarifies the unconditional requirement for implementing Rule
   5.5 of RFC 6724 and reduces the default precedence for 6to4
   addresses.  These updates enhance the supportability of typical
   deployment environments, including automatic and unmanaged
   configurations, and promote consistent IPv6-over-IPv4 precedence
   behavior for both ULA and GUA within local networks.  The document
   acknowledges that certain atypical deployment models may require
   explicit configuration to achieve intended operational outcomes.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-rfc6724-update/

There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-6man-rfc6724-update-23

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-6man-rfc6724-update-23

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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