Cisco Catalyst 4500 Series Configuration Manual page 219

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
debug spanning-tree switch
To enable the switch shim debugging, use the debug spanning-tree switch command. To disable the
debugging output, use the no form of this command.
Syntax Description all
errors
general
pm
rx
decode
errors
interrupt
process
state
tx
decode
Command Default This command has no default settings.
Command Modes
Privileged EXEC mode
Command History Release
12.1(8a)EW
Usage Guidelines This command is supported only on the supervisor engine and enterable only from the switch console.
debug spanning-tree switch {all | errors | general | pm | rx {decode | errors | interrupt |
process} | state | tx [decode]}
no debug spanning-tree switch {all | errors | general | pm | rx {decode | errors | interrupt |
process} | state | tx [decode]}
Displays all the spanning-tree switch shim debugging messages.
Enables the debugging of switch shim errors or exceptions.
Enables the debugging of general events.
Enables the debugging of port manager events.
Displays the received BPDU-handling debugging messages.
Enables the debugging of the decode-received packets of the spanning-tree switch
shim.
Enables the debugging of the receive errors of the spanning-tree switch shim.
Enables the shim ISR receive BPDU debugging on the spanning-tree switch.
Enables the process receive BPDU debugging on the spanning-tree switch.
Enables the debugging of the state changes on the spanning-tree port.
Enables the transmit BPDU debugging on the spanning-tree switch shim.
(Optional) Enables the decode-transmitted packets debugging on the spanning-tree
switch shim.
Modification
This command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
debug spanning-tree switch
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