Fast IP packet classification with configurable processor
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United States of America Patent
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Jun 5, 2007
Grant Date -
N/A
app pub date -
Apr 23, 2002
filing date -
Apr 24, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel solution for fast packet classification includes a novel data structure to store classifier rules which enables fast packet classification, which structure employs bitmaps for each field of the incoming packet for which classification is desired. A fast packet classification algorithm using the novel data structure allows the matching rule with the highest priority to be quickly obtained. A novel rule update algorithm allows new classifier rules to be added into the data structure incrementally. In one practical implementation of a classification engine employing the structures and algorithms of the present invention, a configurable processor with customized instructions is used to accelerate packet classification.
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