Lightweight 4over6: An Extension to the DS-Lite Architecture
draft-ietf-softwire-lw4over6-12

The information below is for an old version of the document
Document Type Active Internet-Draft (softwire WG)
Authors Yong Cui  , Qiong Sun  , Mohamed Boucadair  , Tina Tsou  , Yiu Lee  , Ian Farrer 
Last updated 2014-11-11
Replaces draft-cui-softwire-b4-translated-ds-lite
Stream Internet Engineering Task Force (IETF)
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Stream WG state Submitted to IESG for Publication
Document shepherd Suresh Krishnan
Shepherd write-up Show (last changed 2014-06-19)
IESG IESG state IESG Evaluation::AD Followup
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Responsible AD Ted Lemon
Send notices to softwire-chairs@tools.ietf.org, draft-ietf-softwire-lw4over6@tools.ietf.org
IANA IANA review state Version Changed - Review Needed
Softwire Working Group                                            Y. Cui
Internet-Draft                                       Tsinghua University
Intended status: Standards Track                                  Q. Sun
Expires: May 14, 2015                                      China Telecom
                                                            M. Boucadair
                                                          France Telecom
                                                                 T. Tsou
                                                     Huawei Technologies
                                                                  Y. Lee
                                                                 Comcast
                                                               I. Farrer
                                                     Deutsche Telekom AG
                                                       November 10, 2014

      Lightweight 4over6: An Extension to the DS-Lite Architecture
                    draft-ietf-softwire-lw4over6-12

Abstract

   Dual-Stack 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.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 14, 2015.

Cui, et al.               Expires May 14, 2015                  [Page 1]
Internet-Draft             Lightweight 4over6              November 2014

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Lightweight 4over6 Architecture . . . . . . . . . . . . . . .   5
   5.  Lightweight B4 Behavior . . . . . . . . . . . . . . . . . . .   7
     5.1.  Lightweight B4 Provisioning with DHCPv6 . . . . . . . . .   7
     5.2.  Lightweight B4 Data Plane Behavior  . . . . . . . . . . .   9
       5.2.1.  Fragmentation Behaviour . . . . . . . . . . . . . . .  11
   6.  Lightweight AFTR Behavior . . . . . . . . . . . . . . . . . .  11
     6.1.  Binding Table Maintenance . . . . . . . . . . . . . . . .  11
     6.2.  lwAFTR Data Plane Behavior  . . . . . . . . . . . . . . .  12
   7.  Additional IPv4 address and Port Set Provisioning
       Mechanisms  . . . . . . . . . . . . . . . . . . . . . . . . .  13
   8.  ICMP Processing . . . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  ICMPv4 Processing by the lwAFTR . . . . . . . . . . . . .  14
     8.2.  ICMPv4 Processing by the lwB4 . . . . . . . . . . . . . .  14
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   11. Author List . . . . . . . . . . . . . . . . . . . . . . . . .  15
   12. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  18
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  19
     13.2.  Informative References . . . . . . . . . . . . . . . . .  19
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