Spanning tree TCN

Unanswered Question
Oct 18th, 2007

Hi all, can anyone tell me what triggers the spanning tree change notifications, would enabling a port cause the switch to send one out? and what effect does it have on the network ?

I have this problem too.
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Kevin Dorrell Thu, 10/18/2007 - 00:52

TCNs are generated whenever there is a topology change, including enabling a port. This is one reason why it is advisable to put spanning-tree portfast on the access ports. That way, they do not generate TCNs every time a host comes on- or off- line.

Kevin Dorrell



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