Debug Spanning-Tree Switch - Cisco Catalyst 2960 Command Reference Manual
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- Configuration manual (2288 pages) ,
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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.
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(25)FX
Usage Guidelines
The undebug spanning-tree switch command is the same as the no debug spanning-tree switch
command.
Catalyst 2960 Switch Command Reference
B-62
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.
Appendix B
Catalyst 2960 Switch Debug Commands
78-16882-01
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