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Layer 2 loops

i am wondering how to detect layer 2 loops in a network, can somebody help me out the way to detect layer 2 loop in the network...

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Re: Layer 2 loops

Spanning tree protocol(STP) will detect and prevent layer 2 loops. If you have STP enabled you can use show commands to tell you which ports are being blocked to prevent loops.

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_configuration_example09186a008009467c.shtml

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