3Com 4200G 12-Port Configuration Manual page 212

[Sysname] stp region-configuration
# Configure the region name, VLAN-to-MSTI mapping table, and revision level for the MST region.
[Sysname-mst-region] region-name example
[Sysname-mst-region] instance 1 vlan 10
[Sysname-mst-region] instance 3 vlan 30
[Sysname-mst-region] instance 4 vlan 40
[Sysname-mst-region] revision-level 0
# Activate the settings of the MST region manually.
[Sysname-mst-region] active region-configuration
# Specify Switch B as the root bridge of MSTI 3.
[Sysname] stp instance 3 root primary
3) Configure Switch C.
# Enter MST region view.
<Sysname> system-view
[Sysname] stp region-configuration
# Configure the MST region.
[Sysname-mst-region] region-name example
[Sysname-mst-region] instance 1 vlan 10
[Sysname-mst-region] instance 3 vlan 30
[Sysname-mst-region] instance 4 vlan 40
[Sysname-mst-region] revision-level 0
# Activate the settings of the MST region manually.
[Sysname-mst-region] active region-configuration
# Specify Switch C as the root bridge of MSTI 4.
[Sysname] stp instance 4 root primary
4) Configure Switch D
# Enter MST region view.
<Sysname> system-view
[Sysname] stp region-configuration
# Configure the MST region.
[Sysname-mst-region] region-name example
[Sysname-mst-region] instance 1 vlan 10
[Sysname-mst-region] instance 3 vlan 30
[Sysname-mst-region] instance 4 vlan 40
[Sysname-mst-region] revision-level 0
# Activate the settings of the MST region manually.
[Sysname-mst-region] active region-configuration
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