3com MSR 20-20 참조 매뉴얼

revision-level level

MST region view

level: MSTP revision level, in the range of 0 to 65535. The system default is 0.

Use the region-level command to configure the MSTP revision level of your 
device.

Use the undo region-level command to restore the MSTP revision level to the 
default setting.

The MSTP revision level, the MST region name and the VLAN-to-instance mapping 
table of a device jointly determine the MST region the device belongs to.

instance, region-name, check region-configuration, vlan-mapping modulo, 
and active region-configuration.

# Set the MSTP revision level of the MST region to 5.

<Sysname> system-view

[Sysname] stp region-configuration

[Sysname-mst-region] revision-level 5 

stp { enable | disable }

System view, Ethernet interface view, port group view

enable: Enables the MSTP feature.

disable: Disables the MSTP feature.

Use the stp command to enable or disable the MSTP feature globally or for a port 
or a group of ports.

Use the undo stp command to restore the default MSTP status globally or for a 
port or a group of ports.

By default, MSTP is enabled for all ports, and disabled globally.

Note that: