A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.
Title : Applicability of MPLS-TP Linear Protection for Ring Topologies
Author(s) : Yaacov Weingarten
Stewart Bryant
Danielle Ceccarelli
Diego Caviglia
Francesco Fondelli
Marco Corsi
Bo Wu
Xuehui Dai
Filename : draft-ietf-mpls-tp-ring-protection-03.txt
Pages : 29
Date : 2012-11-05
Abstract:
This document presents an applicability of linear protection
mechanisms for Multi-Protocol Label Switching Transport Profile
(MPLS-TP) in ring topologies. 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 and specifically 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 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.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-tp-ring-protection
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-mpls-tp-ring-protection-03
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-tp-ring-protection-03
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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