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

Click the ADD button.

In this example, assume that Switch 1 has become the root bridge for MST instance 1, and 
Switch 2 has become the root bridge for MST instance 2. Switch 3 has hosts in the Sales 
department (ports 1/0/1, 1/0/2, and 1/0/3) and in the HR department (ports 1/0/4 and 1/0/5). 
Switches 1 and 2 also use hosts in the Sales and Human Resources departments. The hosts 
connected from Switch

 

2 use VLAN 500, MST instance 2 to communicate with the hosts on 

Switch 3 directly. Likewise, hosts of Switch 1 use VLAN 300, MST instance 1 to communicate 
with the hosts on Switch 3 directly.

The hosts use different instances of MSTP to effectively use the links across the switch. The 
same concept can be extended to other switches and more instances of MSTP.