Debug Spanning-Tree Bpdu - Cisco Catalyst 3750-X Command Reference Manual

Appendix B Catalyst 3750-X and 3560-X Switch Debug Commands

debug spanning-tree bpdu

Use the debug spanning-tree bpdu privileged EXEC command to enable debugging of sent and
received spanning-tree bridge protocol data units (BPDUs). Use the no form of this command to disable
debugging.
Syntax Description
receive
transmit
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History Release
12.2(53)SE2
Usage Guidelines The undebug spanning-tree bpdu command is the same as the no debug spanning-tree bpdu
command.
When you enable debugging on a switch stack, it is enabled only on the stack master. To enable
debugging on a stack member, you can start a session from the stack master by using the session
switch-number privileged EXEC command. Then enter the debug command at the command-line
prompt of the stack member. You also can use the remote command stack-member-number LINE
privileged EXEC command on the stack master switch to enable debugging on a member switch without
first starting a session.
Related Commands Command
show debugging
show spanning-tree
OL-29704-01
debug spanning-tree bpdu [receive | transmit]
no debug spanning-tree bpdu [receive | transmit]
(Optional) Display the nonoptimized path for received BPDU debug messages.
(Optional) Display the nonoptimized path for sent BPDU debug messages.
Modification
This command was introduced.
Description
Displays information about the types of debugging that are enabled.
Displays spanning-tree state information.
Catalyst 3750-X and 3560-X Switch Command Reference
debug spanning-tree bpdu
B-91