DHCPv4-over-DHCPv6 (DHCP 4o6) Transport
RFC 7341

 
Document Type RFC - Proposed Standard (August 2014; No errata)
Last updated 2014-08-14
Replaces draft-scskf-dhc-dhcpv4-over-dhcpv6
Stream IETF
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Stream WG state Submitted to IESG for Publication
Consensus Yes
Document shepherd Bernie Volz
Shepherd write-up Show (last changed 2014-03-04)
IESG IESG state RFC 7341 (Proposed Standard)
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Responsible AD Ted Lemon
Send notices to dhc-chairs@ietf.org, draft-ietf-dhc-dhcpv4-over-dhcpv6@ietf.org
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                            Q. Sun
Request for Comments: 7341                                        Y. Cui
Category: Standards Track                            Tsinghua University
ISSN: 2070-1721                                             M. Siodelski
                                                                     ISC
                                                             S. Krishnan
                                                                Ericsson
                                                               I. Farrer
                                                     Deutsche Telekom AG
                                                             August 2014

                DHCPv4-over-DHCPv6 (DHCP 4o6) Transport

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 and two new DHCPv6 options are defined for this purpose.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7341.

Sun, et al.                  Standards Track                    [Page 1]
RFC 7341                   DHCPv4 over DHCPv6                August 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
   to this document.  Code Components extracted from this document must
   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 ....................................................3
   2. Requirements Language ...........................................3
   3. Terminology .....................................................3
   4. Applicability ...................................................4
   5. Architecture Overview ...........................................4
   6. New DHCPv6 Messages .............................................6
      6.1. Message Types ..............................................6
      6.2. Message Formats ............................................6
      6.3. DHCPv4-query Message Flags .................................7
      6.4. DHCPv4-response Message Flags ..............................7
   7. New DHCPv6 Options ..............................................7
      7.1. DHCPv4 Message Option Format ...............................7
      7.2. DHCP 4o6 Server Address Option Format ......................8
   8. Use of the DHCPv4-query Unicast Flag ............................9
   9. DHCP 4o6 Client Behavior .......................................10
   10. Relay Agent Behavior ..........................................12
   11. DHCP 4o6 Server Behavior ......................................12
   12. Security Considerations .......................................13
   13. IANA Considerations ...........................................14
   14. Contributors List .............................................14
   15. References ....................................................14
      15.1. Normative References .....................................14
      15.2. Informative References ...................................15

Sun, et al.                  Standards Track                    [Page 2]
RFC 7341                   DHCPv4 over DHCPv6                August 2014

1.  Introduction

   As the migration towards IPv6 continues, IPv6-only networks will
   become more prevalent.  In such networks, IPv4 connectivity will
   continue to be provided as a service over IPv6-only networks.  In
   addition to provisioning IPv4 addresses for clients of this service,
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