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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