Subject: TR: I-D Action: draft-litkowski-rtgwg-uloop-delay-00.txt

From: <[email-masked]>
Date: Mon, 18 Feb 2013 13:29:04 +0100

Hi,

We posted a "new" proposal for preventing a subset of transient forwarding loops in IP networks.
The subject and solution are not really new but as we can see, no solution are available today in routers even if discussions are existing for years !
Transient forwarding loops are a real problem for IP networks and we (service providers) need working and implementable solutions in this area.

Thanks to provide a feedback on this proposal.

Best Regards,

Stephane

-----Message d'origine-----
De : [email-masked] [mailto:[email-masked]] De la part de [email-masked]
Envoyé : vendredi 15 février 2013 15:46
À : [email-masked]
Objet : I-D Action: draft-litkowski-rtgwg-uloop-delay-00.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

	Title           : Microloop prevention by introducting a local convergence delay
	Author(s)       : Stephane Litkowski
                          Bruno Decraene
                          Pierre Francois
	Filename        : draft-litkowski-rtgwg-uloop-delay-00.txt
	Pages           : 11
	Date            : 2013-02-15

Abstract:
   This document describes a mechanism for link-state routing protocols
   to prevent a subset of transient loops during topology changes.  It
   introduces a two-step convergence by introducing a delay between the
   network wide convergence and the node advertising the failure.  As
   the network wide convergence is delayed in case of down events, this
   mechanism can be used for planned maintenance or for unplanned outage
   provided a fast reroute mechanism is used in conjunction to convert a
   failure into a less urgent topology change.

   Simulation using real network topologies and costs, with pathological
   convergence behaviour, have been performed.  While the proposed
   mechanism does not provide a complete solution, it is simple and it
   solves an interesting fraction of the transient loops in the analyzed
   SP topologies.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-litkowski-rtgwg-uloop-delay

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-litkowski-rtgwg-uloop-delay-00

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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Internet-Draft directories: http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

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