Document Action: 'Recommendations for Discovering IPv6 Prefix Used for IPv6 Address Synthesis' to Informational RFC (draft-ietf-v6ops-prefer8781-07.txt)
The IESG <iesg-secretary@ietf.org> Thu, 07 August 2025 18:25 UTC
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From: The IESG <iesg-secretary@ietf.org>
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Subject: Document Action: 'Recommendations for Discovering IPv6 Prefix Used for IPv6 Address Synthesis' to Informational RFC (draft-ietf-v6ops-prefer8781-07.txt)
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The IESG has approved the following document: - 'Recommendations for Discovering IPv6 Prefix Used for IPv6 Address Synthesis' (draft-ietf-v6ops-prefer8781-07.txt) as Informational RFC This document is the product of the IPv6 Operations Working Group. The IESG contact persons are Mahesh Jethanandani and Mohamed Boucadair. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-v6ops-prefer8781/ Technical Summary On networks providing IPv4-IPv6 translation (RFC 7915), hosts and other endpoints need to know the IPv6 prefix(es) used for translation (the NAT64 prefix). This document provides guidelines for NAT64 prefix discovery, specifically recommending obtaining the NAT64 prefix from Router Advertisement option (RFC 8781) when available. Working Group Summary The WG consensus was strong, with all issues resolved. Document Quality The document provides recommendations for discovery of IPv6 prefix used for IPv6 address synthesis. The main recommendation is to prefer the procedure defined in RFC8781 compared to the heuristic defined in RFC7051. This recommendation does not presently target mobile networks. Personnel The Document Shepherd for this document is Tim Wicinski. The Responsible Area Director is Mohamed Boucadair.