Dell PowerEdge M420 Configuration Manual page 637

The logical representation of the MSTP environment for these three switches
is shown in Figure 22-3.
Figure 22-3. Logical MSTP Environment
MSTI 1
Switch B
VLAN 10*
MSTI 2
Switch B
VLAN 20
MSTI 1 Regional Root & CIST Regional Root
Switch A
Port 1
VLAN 10
Port 1
CIST Regional Root
Switch A
VLAN 20
Port 2
Configuring the Spanning Tree Protocol
Port 2
Port 1
Switch C
VLAN 10
Port 2
Port 1
Switch C
Port 2
VLAN 20
MSTI 2 Regional Root
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