Debug Spanning-Tree Backbonefast - Cisco Catalyst 3560-X Command Reference Manual

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

debug spanning-tree backbonefast

Syntax Description
Defaults
Command Modes
Command History
Usage Guidelines
Related Commands
OL-21522-02
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Use the debug spanning-tree backbonefast privileged EXEC command to enable debugging of
spanning-tree BackboneFast events. Use the no form of this command to disable debugging.
debug spanning-tree backbonefast [detail | exceptions]
no debug spanning-tree backbonefast [detail | exceptions]
detail (Optional) Display detailed BackboneFast debug messages.
exceptions (Optional) Display spanning-tree BackboneFast-exception debug messages.
Debugging is disabled.
Privileged EXEC
Release
12.2(53)SE2
The undebug spanning-tree backbonefast command is the same as the no debug spanning-tree
backbonefast 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.
Command
show debugging
show spanning-tree
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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 backbonefast
B-87