3com MSR 20-20 참조 매뉴얼

System view

None

Use the stp region-configuration command to enter MST region view.

Use the undo stp region-configuration command to restore the default MST 
region configurations.

By default, the default settings are used for all the three MST region parameters. 
Namely, the device’s MST region name is the device’s MAC address, all VLANs are 
mapped to the CIST, and the MSTP revision level is 0.

After you enter MST region view, you can configure the parameters related the 
MST region, including the region name, VLAN-to-instance mapping and revision 
level.

# Enter MST region view.

<Sysname> system-view

[Sysname] stp region-configuration

[Sysname-mst-region] 

stp [ instance instance-id ] root primary

undo stp [ instance instance-id ] root

System view

instance instance-id: MST instance ID, in the range of 0 to 15. MST instance 0 
represents the CIST.

Use the stp root primary command to specify the current device as the root 
bridge of the specified MST instance.

Use the undo stp root command to remove the current device as the root bridge 
of the specified MST instance.

By default, a device is not a root bridge.

Note that: