Packet classification apparatus and method using field level tries
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United States of America Patent
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Aug 19, 2008
Grant Date -
Sep 2, 2004
app pub date -
Feb 27, 2004
filing date -
Feb 28, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A packet classification apparatus and method using field level tries includes a main processing part for generating and maintaining the field level tries, which organize a multi-field packet by field in a hierarchical structure for classifications; and classification engines, each of which is provided with a first classification part for performing queries and updates and processing a prefix lookup represented by an IP source/destination address lookup, and a second classification part for proceeding with classifications by corresponding field based on a result of the first classification part in order to process a range lookup belonging to the result. Accordingly, tries in the unit of a field are developed so that packet classifications for high-speed networking with excellent query performance are secured, and wherein approximately a half-million classifier rules can be processed.
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