B-27
Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Appendix B Cisco ME 3800X and ME 3600X Switch Debug Commands
debug spanning-tree switch
debug spanning-tree switch
To enable debugging of the software interface between the Spanning Tree Protocol (STP) and the port
manager, use the debug spanning-tree switch command in privileged EXEC mode. To disable
debugging, use the no form of this command.
debug spanning-tree switch {all | errors | flush | general | helper | pm | rx {decode | errors |
interrupt | process} | state | tx [decode]}
no debug spanning-tree switch {all | errors | flush | general | helper | pm | rx {decode | errors |
interrupt | process} | state | tx [decode]}
Syntax Description
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History
Usage Guidelines The undebug spanning-tree switch command is the same as the no debug spanning-tree switch
command.
all Displays all spanning-tree switch debug messages.
errors Displays debug messages for the interface between the spanning-tree software
module and the port manager software module.
flush Displays debug messages for the shim flush operation.
general Displays general event debug messages.
helper Displays spanning-tree helper-task debug messages. Helper tasks handle bulk
spanning-tree updates.
pm Displays port-manager event debug messages.
rx Displays 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 Displays spanning-tree port state change debug messages;
tx [decode] Displays sent BPDU handling debug messages. The keyword has this meaning:
• decode—(Optional) Display decoded sent packets.
Release Modification
12.2(52)EY This command was introduced.
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