TP-Link T2500G-10MPS T2500G-10MPSUN V1 Configuration Guide - Page 318

Configuring Spanning Tree MSTP Configurations Instance ID Status Priority VLAN ID Show All Clear All Displays the instance ID. Displays the status of the instance. Enter a value from 0 to 61440 to specify the priority of the switch, which is 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. Enter the VLAN ID mapped to the corresponding instance ID. After the modification, the previous VLAN will be cleared and mapped to the CIST. Click the Show All to show all VLANs mapped to the instance. Click the Clear All to clear up all VLANs from the instance. The cleared VLAN will be automatically mapped to the CIST.  Configuring Parameters on Ports in the Instance Choose the menu Spanning Tree > MSTP Instance > Instance Port Config to load the following page. Figure 3-4 Configuring Port Parameters in the Instance Follow these steps to configure port parameters in the instance: 1) In the Instance ID Select section, select the desired instance ID for its port configuration. Configuration Guide 291