Cisco WS-C2960S-24PD-L Software Guide - Page 169

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: Step 1 Step 2 Step 1 Step 2 Step 3 Step 4 Step 5 Command Purpose configure terminal Enter global configuration mode. 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. interface interface-id Enter interface configuration mode, and specify the GBIC interface on which to enable CSUF. 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. end Return to privileged EXEC mode. show spanning-tree Verify your entries. 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 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 6-41