Netgear M4100-50-POE (FSM7250Pv1h1) - 48‐port FE + 2 GE Combo L2 Managed PoE Switch User Manual

From the STP Configuration screen, enable the Spanning Tree State option.

See 

Use the default values for the rest of the STP configuration settings. 

By default, the STP Operation Mode is MSTP and the configuration name is the switch 
MAC address.

From the CST Configuration screen, set the Bridge Priority value for each of the three 
switches to force Switch 1 to be the root bridge:

Switch 1: 4096

Switch 2: 12288

Switch 3: 20480

Bridge priority values are multiples of 4096.

If you do not specify a root bridge and all switches use the same Bridge Priority value, the 
switch with the lowest MAC address is elected as the root bridge (see 

150).

From the CST Port Configuration screen, select ports 1/0/1 - 1/0/8 and select Enable from 
the STP Status menu.

See 

Click the APPLY button.

Select ports 1/0/1–1/0/5 (edge ports), and select Enable from the Fast Link menu.

Since the edge ports are not at risk for network loops, ports with Fast Link enabled 
transition directly to the forwarding state.

Click the APPLY button.

You can use the CST Port Status screen to view spanning tree information about each 
port.

From the MST Configuration screen, create an MST instances with the following settings:

MST ID: 1

Priority: Use the default (32768)

VLAN ID: 300

156.

Click the ADD button.

Create a second MST instance with the following settings:

MST ID: 2

Priority: 49152

VLAN ID: 500