3Com 4210G Series Configuration Manual page 109

# Activate MST region configuration.
[DeviceD-mst-region] active region-configuration
[DeviceD-mst-region] quit
# Enable MSTP globally.
[DeviceD] stp enable
6) Verifying the configurations
You can use the display stp brief command to display brief spanning tree information on each device
after the network is stable.
# Display brief spanning tree information on Device A.
[DeviceA] display stp brief
MSTID Port
0 GigabitEthernet1/0/1
0 GigabitEthernet1/0/2
0 GigabitEthernet1/0/3
1 GigabitEthernet1/0/1
1 GigabitEthernet1/0/3
3 GigabitEthernet1/0/2
3 GigabitEthernet1/0/3
# Display brief spanning tree information on Device B.
[DeviceB] display stp brief
MSTID Port
0 GigabitEthernet1/0/1
0 GigabitEthernet1/0/2
0 GigabitEthernet1/0/3
1 GigabitEthernet1/0/2
1 GigabitEthernet1/0/3
3 GigabitEthernet1/0/1
3 GigabitEthernet1/0/3
# Display brief spanning tree information on Device C.
[DeviceC] display stp brief
MSTID Port
0 GigabitEthernet1/0/1
0 GigabitEthernet1/0/2
0 GigabitEthernet1/0/3
1 GigabitEthernet1/0/1
1 GigabitEthernet1/0/2
4 GigabitEthernet1/0/3
# Display brief spanning tree information on Device D.
[DeviceD] display stp brief
MSTID Port
0 GigabitEthernet1/0/1
0 GigabitEthernet1/0/2
0 GigabitEthernet1/0/3
3 GigabitEthernet1/0/1
Role STP State Protection
ALTE DISCARDING
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
ROOT FORWARDING
Role STP State Protection
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
DESI FORWARDING
Role STP State Protection
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
ROOT FORWARDING
ALTE DISCARDING
DESI FORWARDING
Role STP State Protection
ROOT FORWARDING
ALTE DISCARDING
ALTE DISCARDING
ROOT FORWARDING
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NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE
NONE