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XS712T Smart Switch
Sample MSTP Configuration
This example shows how to create an MSTP instance from the XS712T switch. The example
network has three different XS712T switches that serve different locations in the network. In
this example, ports g1–g5 are connected to host stations, so those links are not subject to
network loops. Ports g6–g8 are connected across switches 1, 2, and 3.
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
Perform the following procedures on each switch to configure MSTP:
1. Use the VLAN Config
uration screen to create VLANs 300 and 500 (see Basic VLAN
Configuration on
page 85).
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 p
age 86).
3. From the ST
P Configuration screen, enable the Spanning Tree State option (see STP
Configuration on p
age 99).
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 Co
nfiguration 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.