Pre-standard Linear Protection Switching in MPLS-TP
draft-zulr-mpls-tp-linear-protection-switching-10

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MPLS Working Group                                  H. van Helvoort, Ed.
Internet-Draft                                       Huawei Technologies
Intended status: Informational                              J. Ryoo, Ed.
Expires: August 7, 2014                                             ETRI
                                                                H. Zhang
                                                     Huawei Technologies
                                                                F. Huang
                                                                 Philips
                                                                   H. Li
                                                            China Mobile
                                                         A. D'Alessandro
                                                          Telecom Italia
                                                        February 3, 2014

          Pre-standard Linear Protection Switching in MPLS-TP
         draft-zulr-mpls-tp-linear-protection-switching-10.txt

Abstract

   The IETF Standards Track solution for MPLS Transport Profile (MPLS-
   TP) Linear Protection is provided in RFC 6378, draft-ietf-mpls-psc-
   updates and draft-ietf-mpls-tp-psc-itu.

   This document describes the pre-standard implementation of MPLS-TP
   Linear Protection that has been deployed by several network operators
   using equipment from multiple vendors.  At the time of publication
   these pre-standard implementations were still in operation carrying
   live traffic.

   The specified mechanism supports 1+1 unidirectional/bidirectional
   protection switching and 1:1 bidirectional protection switching.  It
   is purely supported by MPLS-TP data plane, and can work without any
   control plane.

   [Editor's note] To be included in "Status of Memo": This document is
   not an Internet Standards Track specification; it is published for
   informational purposes.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

van Helvoort, et al.     Expires August 7, 2014                 [Page 1]
Internet-Draft  Pre-standard MPLS-TP Lin. Prot. Switching  February 2014

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on August 7, 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   4
   3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Linear protection switching overview  . . . . . . . . . . . .   5
     4.1.  Protection architecture types . . . . . . . . . . . . . .   5
       4.1.1.  1+1 architecture  . . . . . . . . . . . . . . . . . .   5
       4.1.2.  1:1 architecture  . . . . . . . . . . . . . . . . . .   6
       4.1.3.  1:n architecture  . . . . . . . . . . . . . . . . . .   6
     4.2.  Protection switching type . . . . . . . . . . . . . . . .   6
     4.3.  Protection operation type . . . . . . . . . . . . . . . .   7
   5.  Protection switching trigger conditions . . . . . . . . . . .   7
     5.1.  Fault conditions  . . . . . . . . . . . . . . . . . . . .   7
     5.2.  External commands . . . . . . . . . . . . . . . . . . . .   8
       5.2.1.  End-to-end commands . . . . . . . . . . . . . . . . .   8
       5.2.2.  Local commands  . . . . . . . . . . . . . . . . . . .   8
   6.  Protection switching schemes  . . . . . . . . . . . . . . . .   9
     6.1.  1+1 unidirectional protection switching . . . . . . . . .   9
     6.2.  1+1 bidirectional protection switching  . . . . . . . . .  10
     6.3.  1:1 bidirectional protection switching  . . . . . . . . .  11
   7.  APS protocol  . . . . . . . . . . . . . . . . . . . . . . . .  12