How to place switches in spanning tree debug mode

Unanswered Question
Aug 27th, 2009

Hello everyone

I have been unable to place a few switches in spanning-tree debug mode using the debug spanning-tree events. The command gets returned as invalid input in priviliged EXEC mode. In other modes it is retured as an unrecognized command. I looked into the configuration of the spanning tree in the show spanning-tree output and it seems all fine. Please advise me how to enable this debugging functionality.

Thank you for reading,

Dee

I have this problem too.
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tstanik Wed, 09/02/2009 - 07:39

Use the debug spanning-tree privileged EXEC command to debug spanning-tree activities. Use the no form of this command to disable debugging output.

debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf | etherchannel | events | exceptions | general | mstp | pvst+ | root | snmp | switch | uplinkfast}

no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf | etherchannel | events | exceptions | general | mstp | pvst+ | root | snmp | switch | uplinkfast}

To view the syntax description click this link.

http://www.cisco.com/en/US/docs/switches/lan/catalyst2940/software/release/12.1_13_ay/command/reference/debug.html#wp1029961

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