Hello,

I having configed MST like following:

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spanning-tree mode mst
spanning-tree mst configuration
instance 1 add vlan 2-4093

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Q. However, when I check the spanning tree status in below,  it give out two spanning tree summary, so which one I should follow up?

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#show spanning-tree

Spanning Tree: Enabled BPDU Flooding: Disabled Portfast BPDU Filtering: Disabled
Mode: mst
CST Regional Root:        80:00:F8:B1:56:0F:2D:E5
Regional Root Path Cost:  0

###### MST 0 Vlan Mapped:   1
ROOT ID
              Priority        32768
              Address         0014.2287.351B
              Path Cost       20200
              Root Port       Te2/0/21
              Hello Time: 2s Max Age: 20s Forward Delay: 15s
              Bridge Max Hops: 20
Bridge ID
              Priority        32768
              Address         F8B1.560F.2DE5
              Hello Time: 2s Max Age: 20s Forward Delay: 15s Transmit Hold Count: 6s

###### MST 1 Vlan Mapped:   2-4093
ROOT ID
              Priority        32768
              Address         F8B1.560F.2DE5
              Path Cost       0
              Root Port
Bridge ID
              Priority        32768
              Address         F8B1.560F.2DE5
              Hello Time: 2s Max Age: 20s Forward Delay: 15s Transmit Hold Count: 6s

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Thanks!