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-05.txt
Pages : 29
Date : 2013-04-04
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.
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-05
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-tp-ring-protection-05
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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