TP-Link T1600G-18TS Configuration Manual page 277

Configuring Spanning Tree
Figure 5-15 Configuring the Region
3) Choose the menu Spanning Tree > MSTP Instance > Instance Config to load the
following page. Map VLAN101-VLAN103 to instance 1; map VLAN104-VLAN106 to
instance 2.
Figure 5-16 Configuring the VLAN-Instance Mapping
4) Choose the menu Spanning Tree > MSTP Instance > Instance Config to load the
following page. Configure the priority of Switch C as 0 to set it as the root bridge in
instance 2.
Configuration Example for MSTP
Configuration Guide 254