DHCPv6 Redundancy Deployment Considerations
draft-ietf-dhc-dhcpv6-redundancy-consider-02

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Document Type Active Internet-Draft (dhc WG)
Last updated 2012-04-25 (latest revision 2011-10-31)
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Responsible AD Ralph Droms
IESG note Ted Lemon (ted.lemon@nominum.com) is the document shepherd.
Send notices to dhc-chairs@tools.ietf.org, draft-ietf-dhc-dhcpv6-redundancy-consider@tools.ietf.org
Dynamic Host Configuration (DHC)                           J. Brzozowski
Internet-Draft                              Comcast Cable Communications
Intended status: BCP                                         J. Tremblay
Expires: May 3, 2012                                      Videotron Ltd.
                                                                 J. Chen
                                                       Time Warner Cable
                                                            T. Mrugalski
                                                                     ISC
                                                        October 31, 2011

              DHCPv6 Redundancy Deployment Considerations
              draft-ietf-dhc-dhcpv6-redundancy-consider-02

Abstract

   This document documents some deployment considerations for those who
   wishing to use DHCPv6 to support their deployment of IPv6.
   Specifically, providing semi-redundant DHCPv6 services is discussed
   in this document.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 May 3, 2012.

Copyright Notice

   Copyright (c) 2011 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

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Internet-Draft      DHCPv6 Redundancy Considerations        October 2011

   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.  Scope and Assumptions  . . . . . . . . . . . . . . . . . . . .  3
     2.1.  Service provider model . . . . . . . . . . . . . . . . . .  4
     2.2.  Enterprise model . . . . . . . . . . . . . . . . . . . . .  5
   3.  Protocol requirements  . . . . . . . . . . . . . . . . . . . .  5
     3.1.  DHCPv6 Servers . . . . . . . . . . . . . . . . . . . . . .  5
     3.2.  DHCPv6 Relays  . . . . . . . . . . . . . . . . . . . . . .  5
     3.3.  DHCPv6 Clients . . . . . . . . . . . . . . . . . . . . . .  6
   4.  Deployment models  . . . . . . . . . . . . . . . . . . . . . .  6
     4.1.  Split Prefixes . . . . . . . . . . . . . . . . . . . . . .  6
     4.2.  Multiple Unique Prefixes . . . . . . . . . . . . . . . . .  8
     4.3.  Identical Prefixes . . . . . . . . . . . . . . . . . . . . 10
   5.  Challenges and Issues  . . . . . . . . . . . . . . . . . . . . 12
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 14
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

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1.  Introduction

   To support the deployment of IPv6 redundancy and high availability
   are required for many if not all components.  This document provides
   information specific to the proposed near term approach for deploying
   semi-redundant DHCPv6 services in advance of DHCPv6 server
   implementations that support a standards based failover or redundancy
   protocol.

2.  Scope and Assumptions

   This document specifies an interim architecture to provide a semi-
   redundant DHCPv6 solution before the availability of vendor or
   standard based solutions.  The proposed architecture may be used in
   wide range of networks, two notable deployment models are discussed:
   service provider and enterprise network environments.  The described
   architecture leverages only existing and implemented DHCPv6
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