Achieving sub-second IGP convergence in large IP networks

Tue, 05/15/2007 - 12:49 by Pierre François

Abstract

We describe and analyse in details the various factors that influence
the convergence time of intradomain link state routing protocols.
This convergence time reflects the time required by a network to
react to the failure of a link or a router. To characterise the convergence
process, we first use detailed measurements to determine
the time required to perform the various operations of a link state
protocol on currently deployed routers. We then build a simulation
model based on those measurements and use it to study the convergence
time in large networks. Our measurements and simulations
indicate that sub-second link-state IGP convergence can be easily
met on an ISP network without any compromise on stability.

Authors
Pierre Francois, Clarence Filsfils, John Evans and Olivier Bonaventure
Source
ACM SIGCOMM Computer Communication Review, 35(3):33-44, July 2005.
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