3Com Switch 4500 Family Manual page 202

Parameters
None
Description
Use the check region-configuration command to display the MST region-related configuration which
is being modified currently, including region name, revision level, and VLAN-to-instance mapping table.
As specified in the MSTP protocol, the configurations of MST regions must be right, especially the
VLAN-to-instance mapping table. MSTP-enabled switches are in the same region only when they have
the same format selector (a 802.1s-defined protocol selector, which is 0 by default and cannot be
configured), region name, VLAN-to-instance mapping table, and revision level. A switch cannot be in
the expected region if any of the four MST region-related parameters mentioned above are not
consistent with those of other switches in the region.
The 3Com switches 4500 support only the MST region name, VLAN-to-instance mapping table, and
revision level. Switches which have the settings of these parameters the same are assigned to the
same MST region.
This command is used to display the configuration information of inactivated MST regions. You can use
this command to find the MST region the switch currently belongs to or check to see whether or not the
MST region-related configuration is correct.
Related commands: instance, region-name, revision-level, vlan-mapping modulo, active
region-configuration.
Examples
# Display the MST region-related configuration.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp region-configuration
[Sysname-mst-region] check region-configuration
Admin Configuration
Format selector :0
Region name
Revision level
Instance
0
16
Table 1-1 Description on the fields of the check region-configuration command
Format selector
Region name
Revision level
Instance Vlans Mapped
:00e0fc004500
:0
Vlans Mapped
1 to 9, 11 to 4094
10
Field Description
The selector specified by MSTP
The name of the MST region
The revision level of the MST region
VLAN-to-instance mappings in the MST region
1-2