Cisco 3560x-24p 参考指南
B-85
Catalyst 3750-X and 3560-X Switch Command Reference
OL-21522-02
Appendix B Catalyst 3750-X and 3560-X Switch 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.
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}
uplinkfast}
no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | csuf/csrt | etherchannel
| events | exceptions | general | mstp | pvst+ | root | snmp | switch | synchronization |
uplinkfast}
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.
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.
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.
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.