Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 501)

Spanning Tree Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 19.11
region (MSTP)
Use this command to assign a name to the device’s MST Region. MST Instances (MSTI) of a
region form different spanning trees for different VLANs.
Use this command for MSTP only.
Use the no variant of this command to remove this region name and reset it to the default.
Syntax region <region-name>
no region
Default By default, the region name is My Name.
Mode MST Configuration
Usage The region name, the revision number, and the digest of the VLAN to MSTI configuration
table must be the same on all devices that are intended to be in the same MST region.
Example
Related Commands revision (MSTP)
show spanning-tree mst config
Parameter Description
<region-name> Specify the name of the region, up to 32 characters. Valid
characters are upper-case, lower-case, digits, underscore.
awplus# configure terminal
awplus(config)# spanning-tree mst configuration
awplus(config-mst)# region ATL