9-18
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
Configuring BackboneFast on the Switch
Configuring BackboneFast on the Switch
These sections describe how to configure BackboneFast:
• Enabling BackboneFast, page 9-18
• Displaying BackboneFast Statistics, page 9-18
• Disabling BackboneFast, page 9-19
Enabling BackboneFast
Note For BackboneFast to work, you must enable it on all switches in the network. BackboneFast is not
supported on Token Ring VLANs. This feature is supported for use with third-party switches.
To enable BackboneFast on the switch, perform this task in privileged mode:
This example shows how to enable BackboneFast on the switch and verify the configuration:
Console> (enable) set spantree backbonefast enable
Backbonefast enabled for all VLANs
Console> (enable) show spantree backbonefast
Backbonefast is enabled.
Console> (enable)
Displaying BackboneFast Statistics
To display BackboneFast statistics, perform this task in privileged mode:
This example shows how to display BackboneFast statistics:
Console> (enable) show spantree summary
Summary of connected spanning tree ports by vlan
Uplinkfast disabled for bridge.
Backbonefast enabled for bridge.
Task Command
Step 1
Enable BackboneFast on the switch. set spantree backbonefast enable
Step 2
Verify that BackboneFast is enabled. show spantree backbonefast
Task Command
Display BackboneFast statistics. show spantree summary
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