Using redistribution communities for interdomain traffic engineering
Bruno Quoitin, Steve Uhlig and Olivier Bonaventure
In this paper, we present a traffic engineering technique that can be
used by regional ISPs and customer networks. On the basis of various
characterizations of ASes in today s Internet we show the requirements
of the small ASes. Then we detail the methods that such ASes currently
use to engineer interdomain traffic.We present an analysis of real
routing tables showing that a lot of ISPs rely on the BGP Community
attribute to build scalable traffic engineering configurations. We also
show that this solution suffers from several drawbacks that limit its
widespread utilization. To avoid the problems of such a technique, we
propose the redistribution communities, a special type of non transitive
extended community attribute and show that the cost of implementing this
solution is small.
Published in Quality of Future Internet Services (QoFIS 2002), October 2002.
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