Debug Spanning-Tree Switch - Cisco Catalyst 2950 Command Reference Manual

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 output.
Syntax Description all
errors
general
helper
pm
rx
tx [decode]
Defaults Debugging is disabled.
Command Modes
Privileged EXEC
Command History Release
12.1(6)EA2
12.1(9)EA1
Usage Guidelines This command can be entered only from the switch console.
The undebug spanning-tree switch command is the same as the no debug spanning-tree switch
command.
Catalyst 2950 Desktop Switch Command Reference
A-14
debug spanning-tree switch {all | errors | general | helper | pm | rx {decode | errors | interrupt
| process} | state | tx [decode]}
no debug spanning-tree switch {all | errors | general | helper | pm | rx {decode | errors |
interrupt | process} | state | tx [decode]}
Enable all the debugging messages.
Enable debugging of error messages for the interface between the spanning-tree
software module and the port manager software module.
Enable debugging of general events.
Enable debugging of the spanning-tree helper task, which handles bulk
spanning-tree updates.
Enable debugging of port manager events.
Display received bridge protocol data unit (BPDU) handling debugging messages.
The keywords have these meanings:
decode—Enable debugging of received packets.
errors—Enable debugging of receive errors.
interrupt—Enable debugging of interrupt service requests (ISRs).
process—Enable debugging of process receive BPDUs.
state—Enable debugging of spanning-tree port state changes.
Display transmitted BPDU handling debugging messages.
Modification
This command was first introduced.
The helper keyword was added.
Appendix A Debug Commands
78-11381-05