B-95
Catalyst 3750-X and 3560-X Switch Command Reference
OL-29704-01
Appendix B Catalyst 3750-X and 3560-X Switch Debug Commands
debug spanning-tree switch
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.
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}
Syntax Description
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History
all Display all spanning-tree switch debug messages.
errors Display debug messages for the interface between the spanning-tree software
module and the port manager software module.
flush Display debug messages for the shim flush operation.
general Display general event debug messages.
helper Display spanning-tree helper-task debug messages. Helper tasks handle bulk
spanning-tree updates.
pm Display port-manager event debug messages.
rx 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.
state Display spanning-tree port state change debug messages;
tx [decode] Display sent BPDU handling debug messages. The keyword has this meaning:
• decode—(Optional) Display decoded sent packets.
uplinkfast Display uplinkfast packet transmission debug messages.
Release Modification
12.2(53)SE2 This command was introduced.
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