Cisco 2950 Software Configuration Guide - Page 335
range of instances separated by a hyphen, or a series of, the range is 0 to 240 in increments of 16.
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Chapter 15 Configuring MSTP Configuring MSTP Features To return the switch to its default setting, use the no spanning-tree mst instance-id root global configuration command. Configuring the Port Priority If a loop occurs, the MSTP uses the port priority when selecting an interface to put into the forwarding state. You can assign higher priority values (lower numerical values) to interfaces that you want selected first and lower priority values (higher numerical values) that you want selected last. If all interfaces have the same priority value, the MSTP puts the interface with the lowest interface number in the forwarding state and blocks the other interfaces. Beginning in privileged EXEC mode, follow these steps to configure the MSTP port priority of an interface. This procedure is optional. Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Command configure terminal interface interface-id spanning-tree mst instance-id port-priority priority end show spanning-tree mst interface interface-id or show spanning-tree mst instance-id copy running-config startup-config Purpose Enter global configuration mode. Specify an interface to configure, and enter interface configuration mode. Valid interfaces include physical ports and port channels. Valid port-channel numbers are 1 to 6. Configure the port priority for an MST instance. • For instance-id, you can specify a single instance, a range of instances separated by a hyphen, or a series of instances separated by a comma. The range is 0 to 15. • For priority, the range is 0 to 240 in increments of 16. The default is 128. The lower the number, the higher the priority. Valid priority values are 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, and 240. All other values are rejected. Return to privileged EXEC mode. Verify your entries. (Optional) Save your entries in the configuration file. Note The show spanning-tree mst interface interface-id privileged EXEC command displays information only if the port is in a link-up operative state. Otherwise, you can use the show running-config interface privileged EXEC command to confirm the configuration. To return the interface to its default setting, use the no spanning-tree mst instance-id port-priority interface configuration command. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 15-17
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