Cisco Catalyst 3120 Command Reference Guide

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Cisco Catalyst Blade Switch 3120 for HP Command Reference
OL-12248-01
Appendix B Cisco Catalyst Blade Switch 3120 for HP Debug Commands
debug spanning-tree
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 |
events | exceptions | general | mstp | pvst+ | root | snmp | switch | synchronization |
uplinkfast}
no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel
| events | exceptions | general | mstp | pvst+ | root | snmp | switch | synchronization |
uplinkfast}
Syntax Description
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History
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.
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.
Release Modification
12.2(40)EX This command was introduced.

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English