3Com 4500G Family Configuration Manual page 117

# 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
ALTE DISCARDING
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
ROOT FORWARDING
Role STP State
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
DESI FORWARDING
Role STP State
DESI FORWARDING
ROOT FORWARDING
DESI FORWARDING
ROOT FORWARDING
ALTE DISCARDING
DESI FORWARDING
Role STP State
ROOT FORWARDING
ALTE DISCARDING
ALTE DISCARDING
ROOT FORWARDING
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Protection
NONE
NONE
NONE
NONE
NONE
NONE
NONE
Protection
NONE
NONE
NONE
NONE
NONE
NONE
NONE
Protection
NONE
NONE
NONE
NONE
NONE
NONE
Protection
NONE
NONE
NONE
NONE