Packet classification device for storing groups of rules
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United States of America Patent
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Apr 26, 2011
Grant Date -
N/A
app pub date -
Nov 5, 2007
filing date -
Feb 8, 2007
priority date (Note) -
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Abstract
A packet classification device includes a CAM device, an SRAM device, and a control circuit that controls and coordinates the operations of the CAM and SRAM devices. For some embodiments, a first CAM block stores unique entries for each packet header field, a RAM block coupled to the first CAM block stores field labels for the unique packet header fields, a second CAM block stores group labels consisting of unique combinations of concatenated field labels, and a second RAM block coupled to the second CAM block stores a group identification (ID) for each group label, wherein each group ID identifies a corresponding one of the groups of rules.
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