OSPFv3 as a Provider Edge to Customer Edge (PE-CE) Routing Protocol
RFC 6565

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Internet Engineering Task Force (IETF)                 P. Pillay-Esnault
Request for Comments: 6565                                 Cisco Systems
Category: Standards Track                                       P. Moyer
ISSN: 2070-1721                                            Pollere, Inc.
                                                                J. Doyle
                                               Jeff Doyle and Associates
                                                              E. Ertekin
                                                             M. Lundberg
                                                     Booz Allen Hamilton
                                                               June 2012

  OSPFv3 as a Provider Edge to Customer Edge (PE-CE) Routing Protocol

Abstract

   Many Service Providers (SPs) offer Virtual Private Network (VPN)
   services to their customers using a technique in which Customer Edge
   (CE) routers are routing peers of Provider Edge (PE) routers.  The
   Border Gateway Protocol (BGP) is used to distribute the customer's
   routes across the provider's IP backbone network, and Multiprotocol
   Label Switching (MPLS) is used to tunnel customer packets across the
   provider's backbone.  Support currently exists for both IPv4 and IPv6
   VPNs; however, only Open Shortest Path First version 2 (OSPFv2) as
   PE-CE protocol is specified.  This document extends those
   specifications to support OSPF version 3 (OSPFv3) as a PE-CE routing
   protocol.  The OSPFv3 PE-CE functionality is identical to that of
   OSPFv2 except for the differences described in this document.

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/rfc6565.

Pillay-Esnault, et al.       Standards Track                    [Page 1]
RFC 6565           OSPFv3 as a PE-CE Routing Protocol          June 2012

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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   This document may contain material from IETF Documents or IETF
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   Without obtaining an adequate license from the person(s) controlling
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   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Pillay-Esnault, et al.       Standards Track                    [Page 2]
RFC 6565           OSPFv3 as a PE-CE Routing Protocol          June 2012

Table of Contents

   1. Introduction ....................................................4
   2. Specification of Requirements ...................................4
   3. Requirements ....................................................4
      3.1. OSPFv3 Specificities .......................................5
   4. BGP/OSPFv3 Interaction Procedures for PE Routers ................5
      4.1. VRFs and OSPFv3 Instances ..................................5
           4.1.1. Independent OSPFv3 Instances in PEs .................6
           4.1.2. OSPFv3 Domain Identifier ............................6
      4.2. OSPFv3 Areas ...............................................7
      4.3. VRFs and Routes ............................................7
           4.3.1. OSPFv3 Routes on PEs ................................8
           4.3.2. VPN-IPv6 Routes Received from MP-BGP ................9
      4.4. BGP Extended Communities Attribute ........................12
      4.5. Loop Prevention Techniques ................................14