Disabling Uplinkfast - Cisco WS-C4003 - Catalyst 4000 Chassis Switch Software Configuration Manual

Configuring UplinkFast
This example shows how to enable UplinkFast with a station-update rate of 40 packets per
100 milliseconds and how to verify that UplinkFast is enabled:
Console> (enable) set spantree uplinkfast enable rate 40
VLANs 1-1005 bridge priority set to 49152.
The port cost and portvlancost of all ports set to above 3000.
Station update rate set to 40 packets/100ms.
uplinkfast all-protocols field set to off.
uplinkfast enabled for bridge.
Console> (enable) show spantree uplinkfast
Station update rate set to 40 packets/100ms.
uplinkfast all-protocols field set to off.
VLAN
-----------------------------------------------
1
100
521
522
523
524
Console> (enable)
This example shows how to display the UplinkFast feature settings for all VLANs:
Console> show spantree uplinkfast
Station update rate set to 15 packets/100ms.
uplinkfast all-protocols field set to off.
VLAN port list
------------------------------------------------
1-20
21-50
51-100 2/1(fwd), 2/12
Console>

Disabling UplinkFast

To disable UplinkFast and restore the default spanning tree bridge priority, port cost, and port-VLAN
cost values to their default values, enter the clear spantree uplinkfast command.
Use caution when entering the clear spantree uplinkfast command. This command restores the
Caution
port-VLAN costs on all ports to the default minus one (18) and the port cost to the default value (19). If
you have configured per-VLAN load sharing on redundant trunk links, the load-sharing configuration
can be affected by this command.
You can disable only spanning tree UplinkFast processing on the switch using the set spantree
uplinkfast disable command. This command does not affect the bridge priority, port cost, and
port-VLAN cost values on the switch.
When you disable UplinkFast, it affects all VLANs on the switch. You cannot disable UplinkFast on a
Note
per-VLAN basis.
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
8-10
Chapter 8
port list
1/1(fwd),1/2
1/2(fwd)
1/1(fwd),1/2
1/1(fwd),1/2
1/1(fwd),1/2
1/1(fwd),1/2
1/1(fwd),1/2-1/5
1/9(fwd), 1/6-1/8, 1/10-1/12
Configuring Spanning Tree PortFast, UplinkFast, and BackboneFast, and Loop Guard
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