Westermo MDI-112-F4G - Manual (Page 69)

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To configure the MSTP setting, the STP Mode of the STP Configuration page
should be changed to MSTP mode first.
After enabled MSTP mode, then you can go to the MSTP Configuration pages.
MSTP Region Configuration
This page allows configure the Region Name and its Revision, mapping the VLAN
to Instance and check current MST Instance configuration. The network can be
divided virtually to different Regions. The switches within the Region should have
the same Region and Revision level.
Region Name: The name for the Region. Maximum length: 32 characters.
Revision: The revision for the Region. Range: 0-65535; Default: 0)