Apparatus and method for preventing loops in a computer network
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United States of America Patent
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Aug 12, 2008
Grant Date -
Sep 14, 2006
app pub date -
May 15, 2006
filing date -
Dec 22, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A network device is configured in a manner to prevent connectivity loops such as one way connectivity loops. A user configures a port of the network device to have an associated state. The state indicates that the port is for communication up the spanning tree towards a root network device, or down the spanning tree away from the root network device. The spanning tree protocol is then executed and determines a role for the port. The role determined by the spanning tree protocol is compared to the user selected state, and if there is an inconsistency, for example one that would indicate a one way connectivity loop, the port is blocked.
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