Debug Spanning-Tree Backbonefast - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

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
Defaults 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
This 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)
OL-27596 -01
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
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
Description
Disables debugging output.
debug spanning-tree backbonefast
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