MPLS Transport Profile (MPLS-TP) Linear Protection in Support of ITU-T's Requirements
draft-ietf-mpls-tp-psc-itu-00

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Last updated 2014-01-17 (latest revision 2013-11-27)
Replaces draft-ryoogray-mpls-tp-psc-itu
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MPLS Working Group                                          J. Ryoo, Ed.
Internet-Draft                                                      ETRI
Updates: 6378 (if approved)                                 E. Gray, Ed.
Intended status: Standards Track                                Ericsson
Expires: May 31, 2014                                    H. van Helvoort
                                                     Huawei Technologies
                                                         A. D'Alessandro
                                                          Telecom Italia
                                                               T. Cheung
                                                                    ETRI
                                                              E. Osborne
                                                     Cisco Systems, Inc.
                                                       November 27, 2013

MPLS Transport Profile (MPLS-TP) Linear Protection in Support of ITU-T's
                              Requirements
                   draft-ietf-mpls-tp-psc-itu-00.txt

Abstract

   This document introduces alternate ways to perform certain operations
   defined in RFC6378, "MPLS Transport Profile (MPLS-TP) Linear
   Protection", and also defines additional behaviors.  This set of
   modified and additional behaviors together with the protocol defined
   in RFC6378 meets the ITU-T's protection switching requirements.

   This document introduces capabilities and modes.  A capability is an
   individual behavior.  The capabilities of a node are advertised using
   the method given in this document.  A mode is a particular
   combination of capabilities.  Two modes are defined in this document:
   Protection State Coordination (PSC) mode and Automatic Protection
   Switching (APS) mode.

   This document describes the behavior of the PSC protocol including
   priority logic and state machine when all the capabilities associated
   with the APS mode are enabled.

   This document updates RFC6378 in that the capability advertisement
   method defined here is an addition to that document.

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

Ryoo, et al.              Expires May 31, 2014                  [Page 1]
Internet-Draft            MPLS-TP LP for ITU-T             November 2013

   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 31, 2014.

Copyright Notice

   Copyright (c) 2013 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 . . . . . . . . . . . . . .   4
   3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Capability 1: Priority Modification . . . . . . . . . . . . .   5
     4.1.  Motivations for swapping priorities of FS and SF-P  . . .   5
     4.2.  Motivation for raising the priority of Clear SF . . . . .   6
     4.3.  Motivation for introducing Freeze command . . . . . . . .   6
     4.4.  Updates to the PSC RFC  . . . . . . . . . . . . . . . . .   6
   5.  Capability 2: Modification of Non-revertive Operation . . . .   7
   6.  Capability 3: Support of Manual Switch to Working Command . .   7
     6.1.  Motivation for adding Manual Switch to Working  . . . . .   7
     6.2.  Terms modified to support MS-W  . . . . . . . . . . . . .   8
     6.3.  Behavior of MS-P and MS-W . . . . . . . . . . . . . . . .   8
     6.4.  Equal priority resolution for MS  . . . . . . . . . . . .   8
   7.  Capability 4: Support of protection against Signal Degrade  .   9
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