Network switching device with pipelined search engines
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United States of America Patent
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Apr 15, 2003
Grant Date -
N/A
app pub date -
Oct 5, 1998
filing date -
Jan 23, 1998
priority date (Note) -
Expired
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Abstract
A switching device for forwarding network traffic to a desired destination on a network, such as a telephone or computer network. The switching device includes multiple ports and uses a lookup table to determine which port to forward network traffic over. The lookup table includes network addresses that are maintained in ascending or descending order. The switching device includes multiple binary search engines coupled in series including one or more precursor binary search engines and a final stage binary search engine. Together, the binary search engines perform an N iteration binary search. Additionally, a single search engine can perform multiple concurrent searches so that source and destination addresses can be obtained simultaneously and without wasted memory cycles.
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