Method and apparatus for programmable lexical packet classifier
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United States of America Patent
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Feb 27, 2007
Issued Date -
N/A
app pub date -
Mar 29, 2000
filing date -
Apr 30, 1999
priority date (Note) -
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Abstract
A packet classification language (PCL) is provided to specify data packets in a routing device. The PCL uses regular expressions to match incoming data packets. Class identifiers associated with each regular expression identifies the class to which each recognized packet belongs for subsequent processing. A PCL compiler produces a DFA which recognizes the data packets as defined by the regular expressions. A hardware implemented DFA is used to scan the input stream which constitutes the data packets.
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