A new Request for Comments is now available in online RFC libraries.
RFC 7596
Title: Lightweight 4over6: An Extension to
the Dual-Stack Lite Architecture
Author: Y. Cui, Q. Sun,
M. Boucadair, T. Tsou,
Y. Lee, I. Farrer
Status: Standards Track
Stream: IETF
Date: July 2015
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 22
Characters: 47038
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-softwire-lw4over6-13.txt
URL: https://www.rfc-editor.org/info/rfc7596
DOI: http://dx.doi.org/10.17487/RFC7596
Dual-Stack Lite (DS-Lite) (RFC 6333) describes an architecture for
transporting IPv4 packets over an IPv6 network. This document
specifies an extension to DS-Lite called "Lightweight 4over6", which
moves the Network Address and Port Translation (NAPT) function from
the centralized DS-Lite tunnel concentrator to the tunnel client
located in the Customer Premises Equipment (CPE). This removes the
requirement for a Carrier Grade NAT function in the tunnel
concentrator and reduces the amount of centralized state that must be
held to a per-subscriber level. In order to delegate the NAPT
function and make IPv4 address sharing possible, port-restricted IPv4
addresses are allocated to the CPEs.
This document is a product of the Softwires Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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