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Catalyst 6500 Series Switch Command Reference—Release7.6
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Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands set spantree backbonefast
set spantree backbonefast
To enable or disable the spanning tree BackboneFast Convergence feature, use the set spantree
backbonefast command.
set spantree backbonefast {enable | disable}
Syntax Description
Defaults The default is BackboneFast convergence is disabled.
Command Types Switch command.
Command Modes Privileged.
Usage Guidelines This command is not supported by the NAM.
This command is not available in Multi-Instance Spanning Tree Protocol (MIST P) mod e.
This command is not available in Multiple Spanning Tree (MST) mode.
For BackboneFast Convergence to work, you must enable it on all switches in the network.
When you try to enable BackboneFast and the switch is in Rapid PVST+ mode, this message is
displayed:
Cannot enable backbonefast when the spantree mode is RAPID-PVST+.
Examples This example shows how to enable BackboneFast Convergence:
Console> (enable) set spantree backbonefast enable
Backbonefast enabled for all VLANs.
Console> (enable)
This example shows the message that is displayed when you try to enable BackboneFast in Rapid PVST+
mode:
Console> (enable) set spantree backbonefast enable
Cannot enable backbonefast when the spantree mode is RAPID-PVST+.
Console> (enable)
Related Commands show spantree
enable Enables BackboneFast Convergence.
disable Disables BackboneFast Convergence.