v6ops                                                             C. Bao
Internet-Draft                                                     X. Li
Obsoletes: 6145 (if approved)                     CERNET Center/Tsinghua
Intended status: Standards Track                              University
Expires: July 13, 2016                                          F. Baker
                                                           Cisco Systems
                                                             T. Anderson
                                                          Redpill Linpro
                                                                 F. Gont
                                                  SI6 Networks / UTN-FRH
                                                        January 10, 2016


               IP/ICMP Translation Algorithm (rfc6145bis)
                     draft-bao-v6ops-rfc6145bis-05

Abstract

   This document describes the Stateless IP/ICMP Translation Algorithm
   (SIIT), which translates between IPv4 and IPv6 packet headers
   (including ICMP headers).  This document obsoletes RFC 6145.

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
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 July 13, 2016.

Copyright Notice

   Copyright (c) 2016 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



Bao, et al.               Expires July 13, 2016                 [Page 1]

Internet-Draft                 rfc6145bis                   January 2016


   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction and Motivation  . . . . . . . . . . . . . . . . .  3
     1.1.  IPv4-IPv6 Translation Model  . . . . . . . . . . . . . . .  3
     1.2.  Applicability and Limitations  . . . . . . . . . . . . . .  3
     1.3.  Stateless vs. Stateful Mode  . . . . . . . . . . . . . . .  4
     1.4.  Path MTU Discovery and Fragmentation . . . . . . . . . . .  5
   2.  Changes from RFC 6145  . . . . . . . . . . . . . . . . . . . .  5
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   4.  Translating from IPv4 to IPv6  . . . . . . . . . . . . . . . .  6
     4.1.  Translating IPv4 Headers into IPv6 Headers . . . . . . . .  7
     4.2.  Translating ICMPv4 Headers into ICMPv6 Headers . . . . . .  9
     4.3.  Translating ICMPv4 Error Messages into ICMPv6  . . . . . . 13
     4.4.  Generation of ICMPv4 Error Message . . . . . . . . . . . . 14
     4.5.  Transport-Layer Header Translation . . . . . . . . . . . . 14
     4.6.  Knowing When to Translate  . . . . . . . . . . . . . . . . 15
   5.  Translating from IPv6 to IPv4  . . . . . . . . . . . . . . . . 15
     5.1.  Translating IPv6 Headers into IPv4 Headers . . . . . . . . 17
       5.1.1.  IPv6 Fragment Processing . . . . . . . . . . . . . . .