Applicability of MPLS-TP Linear Protection for Ring Topologies
draft-ietf-mpls-tp-ring-protection-05

The information below is for an old version of the document
Document Type Active Internet-Draft (mpls WG)
Last updated 2013-04-28 (latest revision 2013-04-04)
Replaces draft-weingarten-mpls-tp-ring-protection
Stream IETF
Intended RFC status Informational
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Shepherd write-up Show (last changed 2013-02-26)
IESG IESG state Waiting for AD Go-Ahead::Revised I-D Needed
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Responsible AD Adrian Farrel
IESG note Loa Andersson (loa@pi.nu) is the document shepherd
Send notices to mpls-chairs@tools.ietf.org, draft-ietf-mpls-tp-ring-protection@tools.ietf.org
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Network Working Group                                      Y. Weingarten
Internet-Draft
Intended status: Informational                                 S. Bryant
Expires: October 6, 2013                                           Cisco
                                                           D. Ceccarelli
                                                             D. Caviglia
                                                             F. Fondelli
                                                                Ericsson
                                                                M. Corsi
                                                                  Altran
                                                                   B. Wu
                                                                  X. Dai
                                                         ZTE Corporation
                                                           April 4, 2013

     Applicability of MPLS-TP Linear Protection for Ring Topologies
               draft-ietf-mpls-tp-ring-protection-05.txt

Abstract

   This document presents an applicability of existing MPLS protection
   mechanisms, both local and end-to-end, to Multi-Protocol Label
   Switching Transport Profile (MPLS-TP) in ring topologies.  This
   document does not propose any new mechanisms or protocols.
   Protection on rings offers a number of opportunities for optimization
   as the protection choices are starkly limited (all traffic traveling
   one way around a ring can only be switched to travel the other way on
   the ring), but also suffers from some complications caused by the
   limitations of the topology.

   Requirements for MPLS-TP protection especially for protection in ring
   topologies are discussed in "Requirements of an MPLS Transport
   Profile" (RFC 5654) and "MPLS Transport Profile (MPLS-TP)
   Survivability Framework" (RFC 6372).  This document shows how MPLS-TP
   linear protection as defined in RFC 6378 can be applied to single
   ring topologies, discusses how most of the requirements are met, and
   describes scenarios in which the function provided by applying linear
   protection in a ring topology falls short of some of the
   requirements.

   This document is a product of a joint Internet Engineering Task Force
   (IETF) / International Telecommunications Union Telecommunications
   Standardization Sector (ITU-T) effort to include an MPLS Transport
   Profile within the IETF MPLS and PWE3 architectures to support the
   capabilities and functionalities of a packet transport network as
   defined by the ITU-T.

Weingarten, et al.       Expires October 6, 2013                [Page 1]
Internet-Draft                 MPLS-TP RP                     April 2013

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 6, 2013.

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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Weingarten, et al.       Expires October 6, 2013                [Page 2]
Internet-Draft                 MPLS-TP RP                     April 2013

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1.  Problem statement  . . . . . . . . . . . . . . . . . . . .  4
     1.2.  Scope of the document  . . . . . . . . . . . . . . . . . .  5
     1.3.  Terminology and Notation . . . . . . . . . . . . . . . . .  6
     1.4.  Contributing Authors . . . . . . . . . . . . . . . . . . .  7
   2.  P2P Ring Protection  . . . . . . . . . . . . . . . . . . . . .  7
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