RFC 7596

Lightweight 4over6: An Extension to the Dual-Stack Lite Architecture, July 2015

Canonical URL:
https://www.rfc-editor.org/rfc/rfc7596.txt
File formats:
Plain TextPDF
Status:
PROPOSED STANDARD
Authors:
Y. Cui
Q. Sun
M. Boucadair
T. Tsou
Y. Lee
I. Farrer
Stream:
IETF
Source:
softwire (int)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC7596

Discuss this RFC: Send questions or comments to softwires@ietf.org

Other actions: Find Errata (if any)  |  Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

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.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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