Cisco WS-C2948G-GE-TX - Configuring Backbonefast; Enabling Backbonefast; Displaying Backbonefast Statistics

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Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
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Chapter 8 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard
Configuring BackboneFast
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 BackboneFast 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:
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.
Vlan Blocking Listening Learning Forwarding STP Active
----- -------- --------- -------- ---------- ----------
1 0 0 0 1 1
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