Procedure (Optional) Configuring Path Cost To configure path cost, perform this procedure: Configuring Spanning Tree Protocol (Optional) Configuring Path Cost Command or Action Purpose Step 1 enable Example: Device> enable Enables privileged EXEC mode. Enter your password if prompted. Step 2 configure terminal Example: Device# configure terminal Enters global configuration mode. Step 3 interface interface-id Example: Device(config)# interface gigabitethernet 1/0/2 Specifies an interface to configure, and enters interface configuration mode. Valid interfaces include physical ports and port-channel logical interfaces (port-channel port-channel-number).
Step 4 spanning-tree port-priority priority Example: Device(config-if)# spanning-tree port-priority 0 Configures the port priority for an interface. For priority, the range is 0 to 240, in increments of 16; the default is 128. Valid 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. Step 5 spanning-tree vlan vlan-id port-priority priority Example: Device(config-if)# spanning-tree vlan 20-25 port-priority 0 Configures the port priority for a VLAN.
• For vlan-id, you can specify a single VLAN identified by VLAN ID number, a range of VLANs separated by a hyphen, or a series of VLANs separated by a comma. The range is 1 to 4094. • For priority, the range is 0 to 240, in increments of 16; the default is 128. Valid 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. Step 6 end Example: Device(config-if)# end Returns to privileged EXEC mode. Configuring Spanning Tree Protocol 16