Enabling Uplinkfast For Use With Redundant Links - Cisco Catalyst 2960 series Configuration Manual

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Enabling UplinkFast for Use with Redundant Links

When you enable UplinkFast, it affects all VLANs on the switch or switch stack. You cannot configure
Note
UplinkFast on an individual VLAN.
You can configure the UplinkFast or the Cross-Stack UplinkFast (CSUF) feature for Rapid PVST+ or for the
MSTP, but the feature remains disabled (inactive) until you change the spanning-tree mode to PVST+.
This procedure is optional. Follow these steps to enable UplinkFast and CSUF.
Before You Begin
UplinkFast cannot be enabled on VLANs that have been configured with a switch priority. To enable UplinkFast
on a VLAN with switch priority configured, first restore the switch priority on the VLAN to the default value
using the no spanning-tree vlan vlan-id priority global configuration command.
SUMMARY STEPS
1. enable
2. configure terminal
3. spanning-tree uplinkfast [max-update-rate pkts-per-second]
4. end
DETAILED STEPS
Command or Action
Step 1
enable
Example:
Switch> enable
Step 2 configure terminal
Example:
Switch# configure terminal
Step 3
spanning-tree uplinkfast [max-update-rate
pkts-per-second]
Example:
Switch(config)# spanning-tree uplinkfast
max-update-rate 200
Purpose
Enables privileged EXEC mode. Enter your password if prompted.
Enters the global configuration mode.
Enables UplinkFast.
(Optional) For pkts-per-second, the range is 0 to 32000 packets per
second; the default is 150.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
How to Configure Optional Spanning-Tree Features
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