Debug Spanning-Tree - Cisco ME 3800X Command Reference Manual

Appendix B Cisco ME 3800X and ME 3600X Switch Debug Commands

debug spanning-tree

To enable debugging of spanning-tree activities, use the debug spanning-tree command in privileged
EXEC mode. To disable debugging, use the no form of this command.
Syntax Description all
bpdu
bpdu-opt
config
etherchannel
events
exceptions
general
mstp
pvst+
root
snmp
switch
synchronization
vlan-shim
Though visible in the command-line help strings, the csuf/csrt keyword is not supported.
Note
Defaults
Debugging is disabled.
Command Modes Privileged EXEC
OL-28238-01
debug spanning-tree {all | bpdu | bpdu-opt | config | etherchannel | events | exceptions | general
| mstp | pvst+ | root | snmp | switch | synchronization | vlan-shim}
no debug spanning-tree {all | bpdu | bpdu-opt | config | etherchannel | events | exceptions |
general | mstp | pvst+ | root | snmp | switch | synchronization | vlan-shim}
Displays all spanning-tree debug messages.
Displays spanning-tree bridge protocol data unit (BPDU) debug messages. See
the debug spanning-tree bpdu
Displays optimized BPDU handling debug messages. See the
spanning-tree bpdu-opt
Displays spanning-tree configuration change debug messages.
Displays EtherChannel-support debug messages.
Displays spanning-tree topology event debug messages.
Displays spanning-tree exception debug messages.
Displays general spanning-tree activity debug messages.
Debug Multiple Spanning Tree Protocol events. See the
mstp command.
Displays per-VLAN spanning-tree plus (PVST+) event debug messages.
Displays spanning-tree root-event debug messages.
Displays spanning-tree Simple Network Management Protocol (SNMP)
handling debug messages.
Displays 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. See the
spanning-tree switch
Displays the spanning-tree synchronization event debug messages.
Displays spanning-tree VLAN shim debug messages. See the
spanning-tree vlan-shim
command.
command.
command.
command
Cisco ME 3800X and ME 3600X Switch Command Reference
debug spanning-tree
debug
debug spanning-tree
debug
debug
B-21