DHCPv6 Options for Discovery NAT64 Prefixes
draft-li-intarea-nat64-prefix-dhcp-option-00

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intarea Working Group                                              L. Li
Internet-Draft                                                    Y. Cui
Intended status: Standards Track                                  C. Liu
Expires: September 7, 2017                                         J. Wu
                                                     Tsinghua University
                                                                F. Baker

                                                       J. Palet Martinez
                                                       Consulintel, S.L.
                                                           March 6, 2017

              DHCPv6 Options for Discovery NAT64 Prefixes
              draft-li-intarea-nat64-prefix-dhcp-option-00

Abstract

   Several IPv6 transition mechanisms require the usage of stateless or
   stateful translators (commonly named as NAT64) able to allow IP/ICMP
   communication between IPv4 and IPv6 networks.

   Those translators are using either a default well-known prefix, and/
   or one or several additional network specific prefixes, which need to
   be configured into the nodes willing to use the translator.
   Different translators will likely have different IPv6 prefixes, to
   attract traffic to the correct translator.  Thus, an automatic
   translator prefix discovery method is necessary.

   This document defines a DHCPv6-based method to inform DHCPv6 clients
   the set of IPv6 and IPv4 prefixes it serves.  This DHCPv6 option can
   be used by several transition mechanisms such as SIIT, 464XLAT, EAM.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   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 September 7, 2017.

Li, et al.              Expires September 7, 2017               [Page 1]
Internet-Draft      NAT64 Prefix Discovery by DHCPv6          March 2017

Copyright Notice

   Copyright (c) 2017 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  New DHCPv6 Option . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  NAT64 Prefix List Option Format . . . . . . . . . . . . .   3
     3.2.  NAT64 Prefix Option Format  . . . . . . . . . . . . . . .   4
   4.  Client Behavior . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Message Flow Illustration . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Stateless IP/ICMP Translation (SIIT) [RFC7915] describes the basic
   translation mechanism (NAT64), which is actually used as the base for
   most of the related translation protocols.

   Stateful NAT64 [RFC6146] describes how to allow IPv6-only clients to
   contact IPv4 servers using unicast UDP, TCP or ICMP.

   464XLAT [RFC6877] describes an IPv4-over-IPv6 solution as one
   technique for IPv4 service extension and encouragement of IPv6
   deployment.  The 464XLAT architecture uses IPv4/IPv6 translation,
   described in [RFC6144], and standardized in [RFC6052], [RFC7915], and
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