Redundancy Mechanism for Inter-domain VPLS Service
RFC 7309

Document Type RFC - Proposed Standard (July 2014; No errata)
Last updated 2015-10-14
Replaces draft-liu-l2vpn-vpls-inter-domain-redundancy
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Giles Heron
Shepherd write-up Show (last changed 2014-05-14)
IESG IESG state RFC 7309 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Adrian Farrel
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                            Z. Liu
Request for Comments: 7309                                 China Telecom
Category: Standards Track                                         L. Jin
ISSN: 2070-1721
                                                                 R. Chen
                                                         ZTE Corporation
                                                                  D. Cai
                                                                S. Salam
                                                                   Cisco
                                                               July 2014

           Redundancy Mechanism for Inter-domain VPLS Service

Abstract

   In many existing Virtual Private LAN Service (VPLS) inter-domain
   deployments (based on RFC 4762), pseudowire (PW) connectivity offers
   no Provider Edge (PE) node redundancy, or offers PE node redundancy
   with only a single domain.  This deployment approach incurs a high
   risk of service interruption, since at least one domain will not
   offer PE node redundancy.  This document describes an inter-domain
   VPLS solution that provides PE node redundancy across domains.

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/rfc7309.

Liu, et al.                  Standards Track                    [Page 1]
RFC 7309            Redundancy for VPLS Inter-domain           July 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.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Network Use Case  . . . . . . . . . . . . . . . . . . . . . .   4
   5.   PW Redundancy Application Procedure for Inter-domain
       Redundancy  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  ICCP Switchover Condition . . . . . . . . . . . . . . . .   6
       5.1.1.  Inter-domain PW Failure . . . . . . . . . . . . . . .   6
       5.1.2.  PE Node Isolation . . . . . . . . . . . . . . . . . .   6
       5.1.3.  PE Node Failure . . . . . . . . . . . . . . . . . . .   6
     5.2.  Inter-domain Redundancy with Two PWs  . . . . . . . . . .   6
     5.3.  Inter-domain Redundancy with Four PWs . . . . . . . . . .   7
   6.  Management Considerations . . . . . . . . . . . . . . . . . .   9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  10
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     10.1.  Normative references . . . . . . . . . . . . . . . . . .  10
     10.2.  Informative references . . . . . . . . . . . . . . . . .  10

Liu, et al.                  Standards Track                    [Page 2]
RFC 7309            Redundancy for VPLS Inter-domain           July 2014

1.  Introduction

   In many existing Virtual Private LAN Service (VPLS) deployments based
   on [RFC4762], pseudowire (PW) connectivity offers no Provider Edge
   (PE) node redundancy, or offers PE node redundancy with only a single
   domain.  This deployment approach incurs a high risk of service
   interruption, since at least one domain will not offer PE node
   redundancy.  This document describes an inter-domain VPLS solution
   that provides PE node redundancy across domains.  The redundancy
   mechanism will provide PE node redundancy and link redundancy in both
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