H3C S6850-56HF

63
VLAN ID Port Role STP State Protection
10 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
10 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
20 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
20 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
20 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
30 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
30 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
# Display brief spanning tree information on Device B.
[DeviceB] display stp brief
VLAN ID Port Role STP State Protection
10 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
10 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
20 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
20 Twenty-FiveGigE1/0/2 DESI FORWARDING NONE
20 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
30 Twenty-FiveGigE1/0/1 DESI FORWARDING NONE
30 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
# Display brief spanning tree information on Device C.
[DeviceC] display stp brief
VLAN ID Port Role STP State Protection
10 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
10 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
20 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
20 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
20 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
40 Twenty-FiveGigE1/0/3 DESI FORWARDING NONE
# Display brief spanning tree information on Device D.
[DeviceD] display stp brief
VLAN ID Port Role STP State Protection
20 Twenty-FiveGigE1/0/1 ALTE DISCARDING NONE
20 Twenty-FiveGigE1/0/2 ROOT FORWARDING NONE
20 Twenty-FiveGigE1/0/3 ALTE DISCARDING NONE
30 Twenty-FiveGigE1/0/1 ROOT FORWARDING NONE
30 Twenty-FiveGigE1/0/2 ALTE DISCARDING NONE
40 Twenty-FiveGigE1/0/3 ROOT FORWARDING NONE
Based on the output, you can draw a topology for each VLAN spanning tree, as shown in Figure 25.