Mstp Regions - Allied Telesis SwitchBlade x908 Series Software Reference Manual

Spanning Tree Introduction: STP, RSTP, and MSTP

MSTP Regions

An MST region is a set of interconnected switches that all have the same values for the
following MST configuration identification elements:
■
■
■
Each of the MST instances created are identified by an MSTI number. This number is locally
significant within the MST region. Therefore, an MSTI will not span across MST regions.
Figure 18-2: MSTIs in different regions
MSTI1
MSTI2
MSTI3
The MSTI1 in Region 1 is unrelated to the MSTI1 in Region 3. Similarly, the MSTI2 in Region 1 is quite
unrelated to the MSTI2 in Region 2.
18.12
MST configuration name - the name of the MST region
Revision level - the revision number of configuration
Configuration Digest - the mapping of which VLANs are mapped to which MST instances
Region 1
Region 2
MSTI2
MSTI4
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
Physical connections
Region 3
MSTI1
MSTI3
MSTI_numbers
C613-50007-01 REV B