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Method and apparatus for a packet classifier

  • US 20030081615A1
  • Filed: 10/16/2002
  • Published: 05/01/2003
  • Est. Priority Date: 10/22/2001
  • Status: Active Grant
First Claim
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1. A method for efficiently classifying packets for a multi-processor/mutli-thread environment, comprising:

  • receiving a packet;

    extracting header information from the received packet;

    calculating a first hash value;

    determining a field of interest in a lookup table from the first hash value;

    calculating a second hash value;

    comparing the second hash value to stored hash values in the field of interest of the lookup table to determine a match between the second hash value and one of the values in the field of interest of the lookup table; and

    if there is a match, transmitting the received packet to a processor corresponding to the one of the values in the row location of the lookup table.

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