Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
debug spanning-tree backbonefast
debug spanning -tree backbon efast
To enable debugging of the spanning tree Bac kboneFast events, use the debug spanning-tree
backbonefast command. To disable the debugging output, use the no form of this command.
debug spanning-tree backbonefast [detail | exceptions]
no debug spanning-tree backbonefast
Syntax Description
Defaults This command has no default settings.
Command Modes Privileged EXEC mode
Usage Guidelines This command is supported only o n the supervisor engine and en terable only from the swit ch 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
detail (Optional) Displays the detailed BackboneFast debugging messages.
exceptio ns (Optional) Enables the debugging of spanning tree BackboneFast exceptions.
Command Description
undebug spanning-tree backbonefast
(same as no debug spanning-tree
backbonefast)
Disables debugging output.