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B-88

Catalyst 3750-X and 3560-X Switch Command Reference

OL-29704-01

Appendix B Catalyst 3750-X and 3560-X Switch Debug Commands

debug spanning-tree

Use the debug spanning-tree privileged EXEC command to enable debugging of spanning-tree

activities. Use the no form of this command to disable debugging.

debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel |

uplinkfast}

no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel

uplinkfast}

Syntax Description

Defaults Debugging is disabled.

Command Modes Privileged EXEC

all Display all spanning-tree debug messages.

backbonefast Display BackboneFast-event debug messages.

bpdu Display spanning-tree bridge protocol data unit (BPDU) debug messages.

bpdu-opt Display optimized BPDU handling debug messages.

config Display spanning-tree configuration change debug messages.

csuf/csrt Display cross-stack UplinkFast and cross-stack rapid transition activity debug

messages.

This keyword is supported only on Catalyst 3750-X switches.

etherchannel

Display EtherChannel-support debug messages.

events Display spanning-tree topology event debug messages.

exceptions Display spanning-tree exception debug messages.

general Display general spanning-tree activity debug messages.

mstp Debug Multiple Spanning Tree Protocol events.

pvst+ Display per-VLAN spanning-tree plus (PVST+) event debug messages.

root Display spanning-tree root-event debug messages.

snmp Display spanning-tree Simple Network Management Protocol (SNMP)

handling debug messages.

synchronization Display the spanning-tree synchronization event debug messages.

switch Display switch shim command debug messages. This shim is the software

module that is the interface between the generic Spanning Tree Protocol (STP)

code and the platform-specific code of various switch platforms.

uplinkfast Display UplinkFast-event debug messages.

Cisco Catalyst 3750-X Command Reference

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