MPLS-TP Shared-Ring protection (MSRP) mechanism for ring topology
draft-cheng-mpls-tp-shared-ring-protection-02

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Last updated 2014-07-01
Replaced by draft-ietf-mpls-tp-shared-ring-protection, rfc8227
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Network Working Group                                         WQ.  Cheng
Internet-Draft                                                  L.  Wang
Intended status: Standards Track                                  H.  Li
Expires: January 3, 2015                                    China Mobile
                                                         H. van Helvoort
                                                                 K.  Liu
                                                                  J.  He
                                           Huawei Technologies Co., Ltd.
                                                                 F.   Li
               China Academy of Telecommunication Research, MIIT., China
                                                                 J. Yang
                                               ZTE Corporation P.R.China
                                                               JF.  Wang
                      Fiberhome Telecommunication Technologies Co., LTD.
                                                           July 02, 2014

   MPLS-TP Shared-Ring protection (MSRP) mechanism for ring topology
             draft-cheng-mpls-tp-shared-ring-protection-02

Abstract

   This document describes requirements and solutions for MPLS-TP Shared
   Ring Protection (MSRP) in the ring topology for point-to-point (P2P)
   services.  The mechanism of MSRP is illustrated and analyzed how it
   satisfies the requirements in RFC6564 [RFC5654] for optimized ring
   protection.

Requirements Language

   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 [RFC2119].

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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   material or to cite them other than as "work in progress."

 Cheng, et al.           Expires January 3, 2015                [Page 1]
Internet-Draft                    MSRP                         July 2014

   This Internet-Draft will expire on January 3, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements for MPLS-TP ring protection  . . . . . . . .   4
       1.1.1.  Recovery for Multiple failures  . . . . . . . . . . .   4
       1.1.2.  Smooth Upgrade from linear protection to ring
               protection  . . . . . . . . . . . . . . . . . . . . .   4
       1.1.3.  Configuration complexity  . . . . . . . . . . . . . .   4
     1.2.  Terminology and Notation  . . . . . . . . . . . . . . . .   5
     1.3.  Contributing Authors  . . . . . . . . . . . . . . . . . .   5
   2.  Shared-ring protection for P2P  . . . . . . . . . . . . . . .   5
     2.1.  Basic concept . . . . . . . . . . . . . . . . . . . . . .   5
       2.1.1.  The establishment of the Ring tunnels . . . . . . . .   6
       2.1.2.  The distribution and management of ring labels  . . .   8
       2.1.3.  Failure detection . . . . . . . . . . . . . . . . . .   9
     2.2.   P2P wrapping . . . . . . . . . . . . . . . . . . . . . .   9
       2.2.1.  Wrapping for Link Failure . . . . . . . . . . . . . .  10
       2.2.2.  Wrapping for node Failure . . . . . . . . . . . . . .  10
     2.3.  P2P short wrapping  . . . . . . . . . . . . . . . . . . .  11
     2.4.  P2P steering  . . . . . . . . . . . . . . . . . . . . . .  12
     2.5.  P2P wrapping for Interconnected Rings . . . . . . . . . .  15
       2.5.1.  Interconnected ring topology  . . . . . . . . . . . .  15
       2.5.2.  Interconnected ring protection scheme . . . . . . . .  16
   3.  Coordination protocol . . . . . . . . . . . . . . . . . . . .  21
     3.1.  RPS protocol  . . . . . . . . . . . . . . . . . . . . . .  21
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