OSPFv3-Based Layer 1 VPN Auto-Discovery
RFC 5523

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Network Working Group                                          L. Berger
Request for Comment: 5523                           LabN Consulting, LLC
Category: Experimental                                        April 2009

                OSPFv3-Based Layer 1 VPN Auto-Discovery

Status of This Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard of any kind.
   Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (c) 2009 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 in effect on the date of
   publication of this document (http://trustee.ietf.org/license-info).
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

Abstract

   This document defines an OSPFv3-based (Open Shortest Path First
   version 3) Layer 1 Virtual Private Network (L1VPN) auto-discovery
   mechanism.  This document parallels the existing OSPF version 2 L1VPN
   auto-discovery mechanism.  The notable functional difference is the
   support of IPv6.

Berger                        Experimental                      [Page 1]
RFC 5523         OSPV3-Based Layer 1 VPN Auto-Discovery       April 2009

Table of Contents

   1. Introduction ....................................................2
      1.1. Terminology ................................................2
      1.2. Conventions Used in This Document ..........................3
      1.3. Overview ...................................................3
   2. OSPFv3 L1VPN LSA and Its TLVs ...................................5
      2.1. OSPFv3 L1VPN LSA ...........................................5
      2.2. L1VPN IPv6 INFO TLV ........................................7
   3. OSPFv3 L1VPN LSA Advertising and Processing .....................8
   4. Backward Compatibility ..........................................9
   5. Manageability Considerations ....................................9
      5.1. Coexistence with and Migration from OSPFv2 .................9
   6. Security Considerations ........................................10
   7. IANA Considerations ............................................11
   8. Acknowledgment .................................................11
   9. References .....................................................11
      9.1. Normative References ......................................11
      9.2. Informative References ....................................12

1.  Introduction

   This document defines an OSPFv3-based (Open Shortest Path First
   version 3) Layer 1 Virtual Private Network (L1VPN) auto-discovery
   mechanism.  This document parallels the existing OSPF version 2 L1VPN
   auto-discovery mechanism.  The notable functional difference is the
   support of IPv6.

1.1.  Terminology

   The reader of this document should be familiar with the terms used in
   [RFC4847] and [RFC5251].  The reader of this document should also be
   familiar with [RFC5340], [RFC5329], and [RFC5252].  In particular,
   the following terms:

      L1VPN   Layer 1 Virtual Private Network

      CE      Customer (edge) network element directly connected to the
              Provider network (terminates one or more links to one or
              more PEs); it is also connected to one or more Cs and/or
              other CEs.

      C       Customer network element that is not connected to the
              Provider network but is connected to one or more other Cs
              and/or CEs.

Berger                        Experimental                      [Page 2]
RFC 5523         OSPV3-Based Layer 1 VPN Auto-Discovery       April 2009

      PE      Provider (edge) network element directly connected to one
              or more Customer networks (terminates one or more links to
              one or more CEs associated with the same or different
              L1VPNs); it is also connected to one or more Ps and/or
              other PEs.

      P       Provider (core) network element that is not directly
              connected to any of Customer networks; P is connected to
              one or more other Ps and/or PEs.

      LSA     OSPF Link State Advertisement.

      LSDB    Link State Database: a data structure supported by an IGP
              speaker.

      PIT     Port Information Table.

      CPI     Customer Port Identifier.

      PPI     Provider Port Identifier.

1.2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

1.3.  Overview

   The framework for Layer 1 VPNs is described in [RFC4847].  Basic mode