TP-Link T1500-28PCT T1500-28PCTTL-SL2428PUN V3 User Guide - Page 346

Configuring Spanning Tree MSTP Configurations ■■ Configuring Parameters on Ports in the Instance Choose the menu L2 FEATURES > Spanning Tree > MSTP Instance > Instance Port Config to load the following page. Figure 3-5 Configuring Port Parameters in the Instance Follow these steps to configure port parameters in the instance: 1) In the Instance Port Config section, select the desired instance ID. Instance ID Select the ID number of the instance that you want to configure. 2) Configure port parameters in the desired instance. UNIT Select the desired unit or LAGs for configuration. Priority Specify the Priority for the port in the corresponding instance. The value should be an integral multiple of 16, ranging from 0 to 240. The port with lower value has the higher priority. When the root path of the port is the same as other ports', the switch will compare the port priorities between these ports and select a root port with the highest priority. Path Cost Enter the value of the path cost in the corresponding instance. The valid values are from 0 to 2000000. The default setting is Auto, which means the port calculates the external path cost automatically according to the port's link speed. The port with the lowest root path cost will be elected as the root port of the switch. User Guide 323