Learning NAT64 PREFIX64s using PCP
draft-ietf-pcp-nat64-prefix64-04

The information below is for an old version of the document
Document Type Active Internet-Draft (pcp WG)
Last updated 2014-02-03 (latest revision 2013-07-30)
Replaces draft-boucadair-pcp-nat64-prefix64-option
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Intended RFC status Proposed Standard
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Document shepherd Dave Thaler
Shepherd write-up Show (last changed 2013-10-21)
IESG IESG state In Last Call (ends 2014-02-04)
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Responsible AD Ted Lemon
Send notices to pcp-chairs@tools.ietf.org, draft-ietf-pcp-nat64-prefix64@tools.ietf.org
IANA IANA review state IANA - Not OK
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PCP Working Group                                           M. Boucadair
Internet-Draft                                            France Telecom
Intended status: Standards Track                           July 31, 2013
Expires: February 01, 2014

                   Learning NAT64 PREFIX64s using PCP
                    draft-ietf-pcp-nat64-prefix64-04

Abstract

   This document defines a new PCP extension to learn the IPv6
   prefix(es) used by a PCP-controlled NAT64 device to build
   IPv4-converted IPv6 addresses.  This extension is needed for
   successful communications when IPv4 addresses are used in referrals.

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
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 01, 2014.

Copyright Notice

   Copyright (c) 2013 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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Issues  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . .   3
       3.2.1.  AAAA Synthesis by the DNS Stub-resolver . . . . . . .   3
       3.2.2.  Application Referrals . . . . . . . . . . . . . . . .   4
   4.  PREFIX64 Option . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Behavior  . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Flow Examples . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  TCP Session Initiated from an IPv6-only Host  . . . . . .   9
     5.2.  SIP Flow Example  . . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   This document defines a new PCP extension [RFC6887] to inform PCP
   clients about the Pref64::/n and suffix [RFC6052] used by a PCP-
   controlled NAT64 device [RFC6146].  It does so by defining a new
   PREFIX64 option.

   This extension is a deterministic solution to help establish
   communications between IPv6-only hosts and remote IPv4-only hosts.
   Unlike [I-D.ietf-behave-nat64-discovery-heuristic], this extension
   solves all the issues identified in
   [I-D.ietf-behave-nat64-learn-analysis].

   Some illustration examples are provided in Section 5.  Detailed
   experiment results are available at
   [I-D.boucadair-pcp-nat64-experiments].

   The use of this PCP extension for NAT64 load balancing purposes
   ([I-D.zhang-behave-nat64-load-balancing]) is out of scope.

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2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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