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H3C Technologies H3C S5560 Series Switches User Manual

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20 GigabitEthernet1/0/1 ALTE DISCARDING NONE

20 GigabitEthernet1/0/2 ROOT FORWARDING NONE

20 GigabitEthernet1/0/3 ALTE DISCARDING NONE

30 GigabitEthernet1/0/1 ROOT FORWARDING NONE

30 GigabitEthernet1/0/2 ALTE DISCARDING NONE

40 GigabitEthernet1/0/3 ROOT FORWARDING NONE

Based on the output, you can draw a topology for each VLAN spanning tree, as shown in

Figure 34

.

Figure 34 VLAN spanning tree topologies