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Packet classification consuming small amount of memory

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3 Author(s)
Xuehong Sun ; Canadian Space Agency, Carleton Univ., St.-Hubert, Canada ; Sahni, S.K. ; Zhao, Y.Q.

In order to provide more value-added services, the Internet needs to classify packets into flows for different treatment. This function becomes a bottleneck in the router. High performance packet classification algorithms are therefore in high demand. This paper describes a new algorithm for packet classification using the concept of independent sets. The algorithm has very small memory requirements. The search speed is not sensitive to the size of the rule table or to the percentage of wildcards in the fields. It also scales well from two-dimensional classifiers to high-dimensional ones. In particular, the algorithm is inherently parallel. Hardware tailored to this algorithm can achieve very fast search speed. The update algorithm proposed is also very fast in general.

Published in:

Networking, IEEE/ACM Transactions on  (Volume:13 ,  Issue: 5 )