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464XLAT Optimization

Document Type Replaced Internet-Draft (v6ops WG)
Expired & archived
Authors Jordi Palet Martinez , Alejandro D'Egidio
Last updated 2020-07-15 (Latest revision 2019-11-04)
Replaced by draft-ietf-v6ops-464xlat-optimization
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state In WG Last Call
Document shepherd Owen DeLong
IESG IESG state Replaced by draft-ietf-v6ops-464xlat-optimization
Consensus boilerplate Yes
Telechat date (None)
Responsible AD (None)
Send notices to Owen DeLong <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document proposes possible solutions to avoid certain drawbacks of IP/ICMP Translation Algorithm (SIIT) when the destinations are available with IPv6. When SIIT is used as a NAT46 and IPv4-only devices or applications initiate traffic flows to dual-stack CDNs (Content Delivery Networks), Caches or other network resources (in the operator network or Internet), those flows will be translated back to IPv4 by a NAT64. This is the case for 464XLAT and MAP-T.


Jordi Palet Martinez
Alejandro D'Egidio

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)