Rule based routing in a switch
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United States of America Patent
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Nov 24, 2009
Grant Date -
Dec 22, 2005
app pub date -
Jun 21, 2004
filing date -
Jun 21, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A routing module applies a plurality of routing rules simultaneously to determine routing for a Fibre Channel frame. Each rule independently determines whether the rule applies to the frame as well as a routing result for the frame. The routing result includes a port address, a zoning indicator, and a priority designation that can be used to route the frame over a virtual channel in an interswitch link. A selector chooses between the results returned by the rules. A component receives routing results specifying an ISL group and selects a physical ISL for the frame. An in-band priority determined by the content of the frame header can also be used in place of the priority designation in the routing result.
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