How to place switches in spanning tree debug mode

admin_2 · ‎08-27-2009

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

tstanik · ‎09-02-2009

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

Ganesh Hariharan · ‎01-12-2010

Hi ,

Check out the belwo link hoep that helps out your query !!

http://comet.lehman.cuny.edu/griffeth/classes/Spring05/Homeworks/Manual.pdf

Regards

Ganesh.H