Method and apparatus for memory efficient fast VLAN lookups...

Details Method and apparatus for memory efficient fast VLAN lookups... Method and apparatus for memory efficient fast VLAN lookups...

2005-01-11

2005-01-11

Gaffin, Jeffrey (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

C710S020000, C710S022000, C710S036000, C710S037000, C710S039000, C710S052000

Reexamination Certificate

active

06842791

ABSTRACT:
A technique for decreasing VLAN lookup times in hardware-based packet switches by emulating the functionality of a content addressable memory (CAM) with software and random access memories (RAM). The decrease in lookup time is achieved by using content from the data packet to index directly into a table that stores forwarding information. Since the forwarding information is addressed directly by content from the packet, the need to spend time and resources sorting through the table of forwarding information with a key search is eliminated.

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Yu D. et al., “Forwarding Engine For Fast Routing Lookups and Updates”, 1999 IEEE Global Telecommunications Conference-Globecom, Rio De Janeiro, Brazil, High Speed Networks XP-001016965, pp. 1556-1564.

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