System for accessing content-addressable memory in packet processor
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United States of America Patent
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Jun 30, 2009
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app pub date -
Apr 28, 2004
filing date -
Mar 30, 2004
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Abstract
A system for accessing a content-addressable memory in a packet processing system is described. A register holds a data element having a key field. Logic derives a value of the key responsive to 1) packet processing state data relating to one or more packets undergoing processing by the packet processing system, and 2) the value of this key field. The derived value of the key is presented to the memory. In response, the memory searches for an entry associated with the presented key value. If found, the content value associated with the entry is output. If not found, a signal indicative of a miss condition is output.
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