H3C S6850 Series

60
# Enable the spanning tree feature globally.
[DeviceD] stp global enable
Verifying the configuration
In this example, Device B has the lowest root bridge ID. As a result, Device B is elected as the root
bridge in MSTI 0.
When the network is stable, you can use the
display stp brief command to display brief
spanning tree information on each device.
# Display brief spanning tree information on Device A.
[DeviceA] display stp brief
MST ID Port Role STP State Protection
0 Twenty-FiveGigE1/0/1 ALTE DISCARDING NONE
0 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
0 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
1 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
1 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
3 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
3 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
# Display brief spanning tree information on Device B.
[DeviceB] display stp brief
MST ID Port Role STP State Protection
0 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
0 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
0 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
1 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
1 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
3 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
3 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
# Display brief spanning tree information on Device C.
[DeviceC] display stp brief
MST ID Port Role STP State Protection
0 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
0 Twenty-FiveGigE1/0/2 ROOT FORWARDING NONE
0 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
1 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
1 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
4 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
# Display brief spanning tree information on Device D.
[DeviceD] display stp brief
MST ID Port Role STP State Protection
0 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
0 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
0 Twenty-FiveGigE1/0/3 ALTE DISCARDING NONE
3 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
3 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
4 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
Based on the output, you can draw each MSTI mapped to each VLAN, as shown in Figure 23.