Cisco WS-C3560E-48PD-SF Command Reference - Page 621

Chapter 2 Catalyst 3560 Switch Cisco IOS Commands spanning-tree mst port-priority spanning-tree mst port-priority Use the spanning-tree mst port-priority interface configuration command to configure an interface priority. If a loop occurs, the Multiple Spanning Tree Protocol (MSTP) can find the interface to put in the forwarding state. Use the no form of this command to return to the default setting. spanning-tree mst instance-id port-priority priority no spanning-tree mst instance-id port-priority Syntax Description instance-id priority Range of spanning-tree instances. 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 4094. The range is 0 to 240 in increments of 16. 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. The lower the number, the higher the priority. Defaults The default is 128. Command Modes Interface configuration Command History Release 12.1(19)EA1 12.2(25)SEC Modification This command was introduced. The instance-id range changed to 1 to 4094. Usage Guidelines 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 multiple spanning tree (MST) puts the interface with the lowest interface number in the forwarding state and blocks other interfaces. 78-16405-05 Catalyst 3560 Switch Command Reference 2-589