HP V1910 User Manual page 198

Basic concepts in MSTP
a.
MST region
A multiple spanning tree region (MST region) consists of multiple devices in a switched network and the
network segments among them. All these devices have the following characteristics:
MSTP-enabled

Same region name

Same VLAN-to-MSTI mapping configuration

 Same MSTP revision level
 Physically linked together
All the devices in region A0 in
The same region name

The same VLAN-to-MSTI mapping configuration (VLAN 1 is mapped to MSTI 1, VLAN 2 to MSTI 2,

and the rest to the common and internal spanning tree (CIST, that is, MSTI 0)
The same MSTP revision level (not shown in the figure)

Multiple MST regions can exist in a switched network. You can assign multiple devices to the same MST
region.
VLAN-to-MSTI mapping table
As an attribute of an MST region, the VLAN-to-MSTI mapping table describes the mapping relationships
between VLANs and MSTIs. In a, the VLAN-to-MSTI mapping table of region A0 is: VLAN 1 is mapped to
a have the same MST region configuration:
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