External loop detection for an ethernet fabric switch
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United States of America Patent
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Apr 14, 2015
Grant Date -
Jan 3, 2013
app pub date -
May 30, 2012
filing date -
Jun 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the present invention provides a switch. The switch includes a local identifier associated with the switch, a receiving interface, a loop detection mechanism, and an interface control mechanism. The receiving interface identifies a loop-detection frame which includes an identifier associated with originating switch of the frame. The loop detection mechanism detects a loop based on a match of the identifier associated with the originating switch and the local identifier. The interface control mechanism is coupled to the loop detection mechanism and precludes, in response to detecting a loop, the receiving interface from forwarding frames corresponding to the loop.
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