Method and apparatus for a packet classifier

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header

Reexamination Certificate

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Reexamination Certificate

active

10272783

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.

REFERENCES:
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patent: 6567839 (2003-05-01), Borkenhagen et al.
patent: 6754662 (2004-06-01), Li
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patent: 6950434 (2005-09-01), Viswanath et al.
patent: 6980550 (2005-12-01), Yip et al.
patent: WO 01 78309 (2001-10-01), None
Chandranmenon G P et al., “Trading Packet Headers For Packet Processing”, IEEE/ACM Transactions on Networking, vol. 4, No. 2, Apr. 1996.

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