Configuring Cross-Stack Uplinkfast - Cisco WS-C2955T-12 Software Manual

Chapter 6 Configuring the System

Configuring Cross-Stack UplinkFast

Before enabling CSUF, make sure your stack switches are properly connected. For more information,
see the
Beginning in privileged EXEC mode, follow these steps to enable CSUF:
Command
Step 1
configure terminal
Step 2
spanning-tree uplinkfast
[max-update-rate pkts-per-second]
Step 1
interface interface-id
Step 2
spanning-tree stack-port
Step 3
end
Step 4
show spanning-tree
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
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.
78-6511-08
"Connecting the Stack Ports" section on page
Purpose
Enter global configuration mode.
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.
Enter interface configuration mode, and specify the GBIC interface on
which to enable CSUF.
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.
Return to privileged EXEC mode.
Verify your entries.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
6-40.
Configuring STP
6-41