DHCPv4 over DHCPv6 Transport
draft-ietf-dhc-dhcpv4-over-dhcpv6-03

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Document Type Active Internet-Draft (dhc WG)
Last updated 2013-11-22
Replaces draft-scskf-dhc-dhcpv4-over-dhcpv6
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DHC Working Group                                                 Q. Sun
Internet-Draft                                                    Y. Cui
Intended status: Standards Track                     Tsinghua University
Expires: May 26, 2014                                       M. Siodelski
                                                                     ISC
                                                             S. Krishnan
                                                                Ericsson
                                                               I. Farrer
                                                     Deutsche Telekom AG
                                                       November 22, 2013

                      DHCPv4 over DHCPv6 Transport
                  draft-ietf-dhc-dhcpv4-over-dhcpv6-03

Abstract

   IPv4 connectivity is still needed as networks migrate towards IPv6.
   Users require IPv4 configuration even if the uplink to their service
   provider supports IPv6 only.  This document describes a mechanism for
   obtaining IPv4 configuration information dynamically in IPv6 networks
   by carrying DHCPv4 messages over DHCPv6 transport.  Two new DHCPv6
   messages as well as new DHCPv6 options are defined for the purpose of
   conveying DHCPv4 messages through IPv6 networks.

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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   This Internet-Draft will expire on May 26, 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

Sun, et al.               Expires May 26, 2014                  [Page 1]
Internet-Draft             DHCPv4 over DHCPv6              November 2013

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Architecture Overview . . . . . . . . . . . . . . . . . . . .   3
   5.  New DHCPv6 Messages . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Message Types . . . . . . . . . . . . . . . . . . . . . .   5
     5.2.  Message Formats . . . . . . . . . . . . . . . . . . . . .   5
     5.3.  Boot-request-v6 Message Flags . . . . . . . . . . . . . .   6
     5.4.  Boot-reply-v6 Message Flags . . . . . . . . . . . . . . .   6
   6.  New DHCPv6 Options  . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  BOOTP Message Option Format . . . . . . . . . . . . . . .   7
     6.2.  DHCPv4-over-DHCPv6 Enable Option Format . . . . . . . . .   7
     6.3.  4o6 Server Address Option Format  . . . . . . . . . . . .   8
   7.  Use of the Boot-request-v6 Unicast Flag . . . . . . . . . . .   8
   8.  4o6 DHCP Client Behavior  . . . . . . . . . . . . . . . . . .   9
   9.  Relay Agent Behavior  . . . . . . . . . . . . . . . . . . . .  10
   10. 4o6 DHCP Server Behavior  . . . . . . . . . . . . . . . . . .  11
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  11
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   13. Contributors List . . . . . . . . . . . . . . . . . . . . . .  12
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     14.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   As the migration towards IPv6 continues, IPv6-only networks will
   become more prevalent.  At the same time, IPv4 connectivity will
   continue to be provided as a service over IPv6-only networks.  In
   addition to providing IPv4 addresses for clients of this service,
   other IPv4 configuration parameters may also need to be provided
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