Debug Spanning-Tree Switch - Cisco Catalyst 3750-X Command Reference Manual

Appendix B Catalyst 3750-X and 3560-X Switch Debug Commands

debug spanning-tree switch

Use the debug spanning-tree switch privileged EXEC command to enable debugging of the software
interface between the Spanning Tree Protocol (STP) software module and the port manager software
module. Use the no form of this command to disable debugging.
Syntax Description all
errors
flush
general
helper
pm
rx
state
tx [decode]
uplinkfast
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History Release
12.2(53)SE2
OL-29704-01
debug spanning-tree switch {all | errors | flush | general | helper | pm | rx {decode | errors |
interrupt | process} | state | tx [decode] | uplinkfast}
no debug spanning-tree switch {all | errors | flush | general | helper | pm | rx {decode | errors |
interrupt | process} | state | tx [decode] | uplinkfast}
Display all spanning-tree switch debug messages.
Display debug messages for the interface between the spanning-tree software
module and the port manager software module.
Display debug messages for the shim flush operation.
Display general event debug messages.
Display spanning-tree helper-task debug messages. Helper tasks handle bulk
spanning-tree updates.
Display port-manager event debug messages.
Display received bridge protocol data unit (BPDU) handling debug messages. The
keywords have these meanings:
• decode—Display decoded received packets.
errors—Display receive error debug messages.
•
interrupt—Display interrupt service request (ISR) debug messages.
•
process—Display process receive BPDU debug messages.
•
Display spanning-tree port state change debug messages;
Display sent BPDU handling debug messages. The keyword has this meaning:
decode—(Optional) Display decoded sent packets.
•
Display uplinkfast packet transmission debug messages.
Modification
This command was introduced.
Catalyst 3750-X and 3560-X Switch Command Reference
debug spanning-tree switch
B-95