Cisco WS-C2960-24TT-L User Manual

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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Chapter 6 Configuring the System
Configuring STP
Configuring Cross-Stack UplinkFast
Before enabling CSUF, make sure your stack switches are properly connected. For more information,
see the “Connecting the Stack Ports” section on page 6-40.
Beginning in privileged EXEC mode, follow these steps to enable CSUF:
To disable CSUF on an interface, use the no spanning-tree stack-port interface configuration
command. To disable UplinkFast on the switch, use the no spanning-tree uplinkfast global
configuration command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
spanning-tree uplinkfast
[max-update-rate pkts-per-second]
Enable UplinkFast on the switch.
(Optional) For max-update-rate pkts-per-second, specify the number of
packets per second at which update packets are sent. The range is 0 to 65535;
the default is 150 packets per second.
Step 1
interface interface-id Enter interface configuration mode, and specify the GBIC interface on
which to enable CSUF.
Step 2
spanning-tree stack-port Enable CSUF on only one stack-port GBIC interface.
The stack port connects to GigaStack GBIC multidrop backbone. If you try
to enable CSUF on a Fast Ethernet or a copper-based Gigabit Ethernet port,
you receive an error message.
If CSUF is already enabled on an interface and you try to enable it on another
interface, you receive an error message. You must disable CSUF on the first
interface before enabling it on a new interface.
Use this command only on access switches.
Step 3
end Return to privileged EXEC mode.
Step 4
show spanning-tree Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco WS-C2960-24TT-L Specifications

General

Brand	Cisco
Model	WS-C2960-24TT-L
Category	Switch
Language	English