Debug Spanning-Tree - Cisco Catalyst 3560-X Command Reference Manual
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Also See for Catalyst 3560-X:
- Software configuration manual (1538 pages) ,
- Command reference manual (1244 pages) ,
- Manual (276 pages)
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Appendix B
Catalyst 3750-X and 3560-X Switch Debug Commands
debug spanning-tree
Syntax Description
Defaults
Command Modes
OL-21522-02
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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}
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.
Debugging is disabled.
Privileged EXEC
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Catalyst 3750-X and 3560-X Switch Command Reference
debug spanning-tree
B-85
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