NDLI: A smart pre-classifier to reduce power consumption of TCAMs for multi-dimensional packet classification

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A smart pre-classifier to reduce power consumption of TCAMs for multi-dimensional packet classification

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A smart pre-classifier to reduce power consumption of TCAMs for multi-dimensional packet classification

Content Provider	ACM Digital Library
Author	Banerjee, Suman Ma, Yadi
Abstract	Ternary Content-Addressable Memories (TCAMs) has become the industrial standard for high-throughput packet classification. However, one major drawback of TCAMs is their high power consumption, which is becoming critical with the boom of data centers, the growing classifiers and the deployment of IPv6. In this paper, we propose a practical and efficient solution which introduces a smart pre-classifier to reduce power consumption of TCAMs for multi-dimensional packet classification. We reduce the dimension of the problem through the pre-classifier which pre-classifies a packet on two header fields, source and destination IP addresses. We then return to the high dimension problem where only a small portion of a TCAM is activated and searched for a given packet. The smart pre-classifier is built in a way such that a given packet matches at most one entry in the pre-classifier, which make commodity TCAMs sufficient to implement the pre-classifier. Furthermore, each rule is stored only once in one of the TCAM blocks, which avoids rule replication. The presented solution uses commodity TCAMs, and the proposed algorithms are easy to implement. Our scheme achieves a median power reduction of 91% and an average power reduction of 88% on real and synthetic classifiers respectively.
Starting Page	335
Ending Page	346
Page Count	12
File Format	PDF MP4
ISBN	9781450314190
DOI	10.1145/2342356.2342428
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-08-13
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Power consumption Smartpc Packet classification
Content Type	Audio Text
Resource Type	Article

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