RFC 6264 on An Incremental Carrier-Grade NAT (CGN) for IPv6 Transition
rfc-editor@rfc-editor.org Tue, 14 June 2011 03:50 UTC
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Subject: RFC 6264 on An Incremental Carrier-Grade NAT (CGN) for IPv6 Transition
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Date: Mon, 13 Jun 2011 20:50:36 -0700
Cc: v6ops@ietf.org, rfc-editor@rfc-editor.org
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A new Request for Comments is now available in online RFC libraries.
RFC 6264
Title: An Incremental Carrier-Grade NAT (CGN)
for IPv6 Transition
Author: S. Jiang, D. Guo,
B. Carpenter
Status: Informational
Stream: IETF
Date: June 2011
Mailbox: jiangsheng@huawei.com,
guoseu@huawei.com,
brian.e.carpenter@gmail.com
Pages: 13
Characters: 31881
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-v6ops-incremental-cgn-03.txt
URL: http://www.rfc-editor.org/rfc/rfc6264.txt
Global IPv6 deployment was slower than originally expected. As IPv4
address exhaustion approaches, IPv4 to IPv6 transition issues become
more critical and less tractable. Host-based transition mechanisms
used in dual-stack environments cannot meet all transition
requirements. Most end users are not sufficiently expert to configure
or maintain host-based transition mechanisms. Carrier-Grade NAT (CGN)
devices with integrated transition mechanisms can reduce the
operational changes required during the IPv4 to IPv6 migration or
coexistence period.
This document proposes an incremental CGN approach for IPv6
transition. It can provide IPv6 access services for IPv6 hosts and
IPv4 access services for IPv4 hosts while leaving much of a legacy
ISP network unchanged during the initial stage of IPv4 to IPv6
migration. Unlike CGN alone, incremental CGN also supports and
encourages smooth transition towards dual-stack or IPv6-only ISP
networks. An integrated configurable CGN device and an adaptive home
gateway (HG) device are described. Both are reusable during
different transition phases, avoiding multiple upgrades. This enables
IPv6 migration to be incrementally achieved according to real user
requirements. This document is not an Internet Standards Track
specification; it is published for informational purposes.
This document is a product of the IPv6 Operations Working Group of the IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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