TP-Link T1500-28TC TL-SL2428 T1500-28TCUN V1 Configuration Guide - Page 201

Configuring Spanning Tree MSTP Configurations Switch(config)#interface fastEthernet 1/0/3 Switch(config-if)#spanning-tree Switch(config-if)#spanning-tree common-config port-priority 32 Switch(config-if)#show spanning-tree interface fastEthernet 1/0/3 MST-Instance 0 (CIST) Interface State Prio Ext-Cost Int-Cost Edge P2p Mode Role Status Fa1/0/3 Enable 32 Auto Auto No No(auto) N/A N/A LnkDwn MST-Instance 5 Interface Prio Cost Role Status Fa1/0/3 144 200 N/A LnkDwn Switch(config-if)#end Switch#copy running-config startup-config 3.2.2 Configuring the MSTP Region  Configuring the MST Region Follow these steps to configure the MST region and the priority of the switch in the instance: Step 1 configure Enter global configuration mode. Step 2 spanning-tree mst instance instance-id priority pri Configure the priority of the switch in the instance. instance-id: Specify the instance ID, the valid values ranges from 1 to 8. pri: Specify the priority of the switch. The valid values are from 0 to 61440, which are divisible by 4096, and the default value is 32768. The switch with the lower value has the higher priority, and the switch with the highest priority will be elected as the root bridge in the desired instance. Step 3 spanning-tree mst configuration Enter MST configuration mode, as to configure the VLAN-Instance mapping, region name and revision level. Configuration Guide 180