Combined pipelined classification and address search method and apparatus for switching environments
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United States of America Patent
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Jul 20, 2010
Grant Date -
Jan 5, 2006
app pub date -
Jun 30, 2004
filing date -
Jun 30, 2004
priority date (Note) -
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Abstract
A packet switching node in a pipelined architecture processing packets received via an input port associated with the packet switching node performs a method, which includes: determining a packet frame type; selectively extracting packet header field values specific to a packet frame type, including packet addressing information; ascribing to the packet a preliminary action to be performed; searching packet switching information tracked by the packet switching node based on extracted packet addressing information; formulating a preliminary switch response for the packet; classifying the packet into a packet flow; modifying the preliminary switch response in accordance with one of the preliminary action, the packet flow into which the packet was classified, and a default port action corresponding to the input port; modifying the packet header in accordance with one of the preliminary action, the packet flow, and the default port action; and processing the packet.
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