Cisco WS-C2350-48TD-S Command Reference Manual page 588

debug spanning-tree
Usage Guidelines The undebug spanning-tree command is the same as the no debug spanning-tree command.
Related Commands Command
show debugging
show spanning-tree
Catalyst 2350 Switch Command Reference
B-48
Description
Displays information about the types of debugging that are enabled.
Displays spanning-tree state information.
Appendix B Catalyst 2350 Debug Commands
OL-19055-01