Inter-Chassis Communication Protocol for Layer 2 Virtual Private Network (L2VPN) Provider Edge (PE) Redundancy
RFC 7275

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Internet Engineering Task Force (IETF)                        L. Martini
Request for Comments: 7275                                      S. Salam
Category: Standards Track                                     A. Sajassi
ISSN: 2070-1721                                                    Cisco
                                                                M. Bocci
                                                          Alcatel-Lucent
                                                           S. Matsushima
                                                        Softbank Telecom
                                                               T. Nadeau
                                                                 Brocade
                                                               June 2014

                Inter-Chassis Communication Protocol for
 Layer 2 Virtual Private Network (L2VPN) Provider Edge (PE) Redundancy

Abstract

   This document specifies an Inter-Chassis Communication Protocol
   (ICCP) that enables Provider Edge (PE) device redundancy for Virtual
   Private Wire Service (VPWS) and Virtual Private LAN Service (VPLS)
   applications.  The protocol runs within a set of two or more PEs,
   forming a Redundancy Group, for the purpose of synchronizing data
   among the systems.  It accommodates multi-chassis attachment circuit
   redundancy mechanisms as well as pseudowire redundancy mechanisms.

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/rfc7275.

Martini, et al.              Standards Track                    [Page 1]
RFC 7275              ICCP for L2VPN PE Redundancy             June 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
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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
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   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   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.

Martini, et al.              Standards Track                    [Page 2]
RFC 7275              ICCP for L2VPN PE Redundancy             June 2014

Table of Contents

   1. Introduction ....................................................5
   2. Specification of Requirements ...................................5
   3. ICCP Overview ...................................................5
      3.1. Redundancy Model and Topology ..............................5
      3.2. ICCP Interconnect Scenarios ................................7
           3.2.1. Co-located Dedicated Interconnect ...................7
           3.2.2. Co-located Shared Interconnect ......................8
           3.2.3. Geo-redundant Dedicated Interconnect ................8
           3.2.4. Geo-redundant Shared Interconnect ...................9
      3.3. ICCP Requirements .........................................10
   4. ICC LDP Protocol Extension Specification .......................11
      4.1. LDP ICCP Capability Advertisement .........................12
      4.2. RG Membership Management ..................................12
           4.2.1. ICCP Connection State Machine ......................13
      4.3. Redundant Object Identification ...........................17
      4.4. Application Connection Management .........................17
           4.4.1. Application Versioning .............................18