Performance Evalution of TCAM Based Pattern-Matching Algorithm

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Executive Summary

With the increasing importance of network protection from cyber threats, it is required to develop a multi-gigabit rate pattern-matching method for protecting against malicious attacks in high-speed networks. This paper devises a high-speed deep packet inspection algorithm with TCAM by using an m-byte jumping window pattern-matching scheme. The proposed algorithm significantly reduces the number of TCAM lookups per payload by m times with the marginally enlarged TCAM size which can be implemented by cascading multiple TCAMs. Due to the reduced number of TCAM lookups, the authors can easily achieve a multi-gigabit rate for scanning the packet payload.

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