Cisco WS-C2980G-A Software Guide - Page 173
Configuring BackboneFast, Displaying BackboneFast Statistics
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Chapter 8 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard Configuring BackboneFast This example shows how to disable UplinkFast on the switch and restore the default bridge priority, port cost, and port-VLAN cost values: Console> (enable) clear spantree uplinkfast This command will cause all portcosts, portvlancosts, and the bridge priority on all vlans to be set to default. Do you want to continue (y/n) [n]? y VLANs 1-1005 bridge priority set to 32768. The port cost of all bridge ports set to default value. The portvlancost of all bridge ports set to default value. uplinkfast all-protocols field set to off. uplinkfast disabled for bridge. Console> (enable) show spantree uplinkfast uplinkfast disabled for bridge. Console> (enable) Configuring BackboneFast The following sections describe how to configure the BackboneFast feature on the switch. Enabling BackboneFast Note You must enable BackboneFast 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: Step 1 Step 2 Task Enable BackboneFast on the switch. Verify that BackboneFast is enabled. Command set spantree backbonefast enable show spantree backbonefast This example shows how to enable BackboneFast on the switch and how to 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: Task Display BackboneFast statistics. Command show spantree summary 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-17
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