Cisco Catalyst 4500 Series Configuration Manual page 218

debug spanning-tree backbonefast
debug spanning-tree backbonefast
To enable debugging of the spanning tree BackboneFast events, use the debug spanning-tree
backbonefast command. To disable the debugging output, use the no form of this command.
Syntax Description
detail
exceptions
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.
Examples
The following example shows how to enable the debugging and to display the detailed spanning tree
BackboneFast debugging information:
Switch# debug spanning-tree backbonefast detail
Spanning Tree backbonefast detail debugging is on
Switch#
Related Commands Command
undebug spanning-tree backbonefast
(same as no debug spanning-tree
backbonefast)
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
2-180
debug spanning-tree backbonefast [detail | exceptions]
no debug spanning-tree backbonefast
(Optional) Displays the detailed BackboneFast debugging messages.
(Optional) Enables the debugging of spanning tree BackboneFast exceptions.
Modification
This command was introduced on the Catalyst 4500 series switch.
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
Description
Disables debugging output.
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