Method and apparatus for a packet classifier
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United States of America Patent
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-
Jul 24, 2007
Grant Date -
May 1, 2003
app pub date -
Oct 16, 2002
filing date -
Oct 22, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In one embodiment, a method for efficiently classifying packets for a multi-processor/mutli-thread environment is provided. The method initiates with receiving a packet. Then, header information is extracted form the received packet. Next, a first hash value is calculated. Then, a field of interest in a lookup table is determined from the first hash value. Next, a second hash value is calculated. Then, the second hash value is compared 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. If there is a match, the received packet is transmitted to a processor corresponding to the one of the values in the row location of the lookup table. A network interface card and a system for efficiently classifying packets in a multicore/multithread environment are also provided.
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