TP-Link T1600G-18TS Configuration Manual page 278

Configuring Spanning Tree
Figure 5-17 Configuring the Priority of Switch C in Instance 2
5) Choose the menu Spanning Tree > STP Instance > STP Config to load the following
page. Enable MSTP function globally, here we leave the values of the other global
parameters as default settings.
Figure 5-18 Configuring the MSTP Globally
6) Click Save Config to save the settings.
Configuration Example for MSTP
Configuration Guide 255