User manual

Ports g1-g5
Switch 1
Connected to Hosts
Root Bridge
Switch 2
Switch 3
Ports g1-g5
Connected to Hosts
Ports g1-g5
Connected to Hosts
Ports g6-g8
Connected to Switch 2 and 3
Ports g6-g8
Connected to Switch 1 and 2
Ports g6-g8
Connected to
Switch 1 and 3
Appendix B: Configuration Examples | 259
GS108T and GS110TP Smart Switch Software Administration Manual
Perform the following procedures on each switch to configure MSTP:
1. Use the VLAN Configuration screen to create VLANs 300 and 500 (see VLAN
Configuration on page 84).
2. Use the VLAN Membership screen to include ports g1–g8 as tagged (T) or untagged (U)
members of VLAN 300 and VLAN 500 (see VLAN Membership Configuration on page 86).
3. From the STP Configuration screen, enable the Spanning Tree State option (see STP
Switch Configuration on page 95).
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.
4. 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
Note: Bridge priority values are multiples of 4096.
If you do not specify a root bridge and all switches have the same Bridge Priority value,
the switch with the lowest MAC address is elected as the root bridge (see CST
Configuration on page 97).
5. From the CST Port Configuration screen, select ports g1–g8 and select Enable from the
STP Status menu (see CST Port Configuration on page 98).
6. Click Apply.
7. Select ports g1–g5 (edge ports), and select Enable from the Fast Link menu.