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Old 07-23-2014, 11:16 PM
rameshng rameshng is offline
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In addition to that below other features can also help you to detect the loops in the network.
STP BPDU filtering ignore-self

You can use the STP BPDU filtering ignore-self parameter to prevent the switch from blocking
ports if an IP Phone loops back BPDU packets. When you enable BPDU filtering on the switch port, if you turn off a connected IP Phone, the BPDU packet can loop back to the switch. The switch can interpret the looping BPDU packet as an attack and block the port
administratively.


more information how to configure is here.
http://downloads.avaya.com/css/P8/documents/100134063
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