Mstp Configuration Example - Two Regions; Figure 9: Mstp Example With Two Regions - Avaya 8600 Engineering

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4. MSTP Configuration Example - Two Regions

Figure 9: MSTP Example with Two Regions

In this configuration example, we take the exact same configuration used in Section 3 with the exception
of creating a second region with switches 8600-1, 8600-2, 4550T-1, and 4548GT-2. All the same CIST
and MSTI priorities will be used. The only configuration change will be the MSTP region name as
illustrated in the diagram above. This will result in only one forwarding port between the two regions via
8600-1 port 1/23. In the region named ―region2‖, 8600-1 will become the root bridge for MSTI 1 while
8600-2 will become the root bridge for MSTI 2. 8600-1 will also become the CIST Regional Root for the
region named ―region2‖ based on the priority settings configured.
RSTP/MSTP Technical Configuration Guide
46
July 2010