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

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Last updated 2014-02-09 (latest revision 2014-02-03)
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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.

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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
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