Prefix Pool Option for DHCPv6 Relay Agents on Provider Edge Routers
draft-ietf-dhc-dhcpv6-prefix-pool-opt-01

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Last updated 2012-10-22
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DHC Working Group                                                 L. Yeh
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                T. Lemon
Expires: April 22, 2013                                     Nominum, Inc
                                                            M. Boucadair
                                                          France Telecom
                                                        October 19, 2012

  Prefix Pool Option for DHCPv6 Relay Agents on Provider Edge Routers
                draft-ietf-dhc-dhcpv6-prefix-pool-opt-01

Abstract

   The DHCPv6 Prefix Pool option provides a mechanism for DHCPv6 Prefix
   Delegation (DHCPv6-PD), allowing the DHCPv6 server to notify a DHCPv6
   relay agent implemented on a Provider Edge (PE) router about active
   prefix pools allocated by the DHCPv6 server to the PE router.  The
   information of active prefix pools can be used to enforce IPv6 route
   aggregation on the PE router through adding or removing aggregation
   routes according to the status of the prefix pools.  The advertising
   of the aggregation routes in the routing protocol enabled on the
   network-facing interface of PE routers will dramatically decreases
   the number of the routing table entries in the ISP network.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 22, 2013.

Copyright Notice

   Copyright (c) 2012 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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Internet-Draft          DHCPv6 Prefix Pool Option           October 2012

   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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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology and Conventions  . . . . . . . . . . . . . . . . .  4
   3.  Scenario and Network Architecture  . . . . . . . . . . . . . .  5
   4.  Prefix Pool Option . . . . . . . . . . . . . . . . . . . . . .  6
   5.  Relay Agent Behavior . . . . . . . . . . . . . . . . . . . . .  8
   6.  Server Behavior  . . . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   9.  Contributors List  . . . . . . . . . . . . . . . . . . . . . . 11
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     11.1.  Normative References  . . . . . . . . . . . . . . . . . . 12
     11.2.  Informative References  . . . . . . . . . . . . . . . . . 12
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

   The DHCPv6 protocol [RFC3315] specifies a mechanism for the
   assignment of IPv6 address and configuration information to IPv6
   nodes.  The DHCPv6 Prefix Delegation (DHCPv6-PD) [RFC3633] specifies
   a mechanism for the delegation of IPv6 prefixes from the Delegating
   Router (DR) acting as the DHCPv6 server to the Requesting Routers
   (RR) acting as the DHCPv6 clients.  DHCPv6 servers always maintain
   authoritative information associated with their operations including,
   but not limited to, the binding data of the delegated IPv6 prefixes,
   the lease data of the delegated IPv6 prefixes, and the status of
   their prefix pools.  A prefix pool configured and maintained on the
   server can usually be a short prefix (e.g., a /40 prefix), out of
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