Debug Spanning-Tree Backbonefast - Cisco 4500M Command Reference Manual

Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches

debug spanning-tree backbonefast

To enable debugging of spanning tree BackboneFast events, use the debug spanning-tree backbonefast
command. To disable debugging output, use the no form of this command.
Syntax Description
detail
exceptions
Defaults
This command has no default settings.
Command Modes
Privileged EXEC
Command History Release
12.1(8a)EW
Usage Guidelines
This command is supported by the supervisor engine only and can be entered only from the switch
console.
Examples
This example shows how to enable debugging and to display detailed spanning tree BackboneFast
debugging information:
Switch# debug spanning-tree backbonefast detail
Spanning Tree backbonefast detail debugging is on
Switch#
Related Commands
undebug spanning-tree backbonefast (same as no debug spanning-tree backbonefast )
78-16201-01
debug spanning-tree backbonefast [detail | exceptions]
no debug spanning-tree backbonefast
(Optional) Displays detailed BackboneFast debugging messages.
(Optional) Enables debugging of spanning tree BackboneFast exceptions.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
debug spanning-tree backbonefast
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