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Multiple Instance Spanning-Tree Operation
Displaying MSTP Statistics and Configuration
Displaying Global MSTP Status
The following commands display the MSTP statistics for the connections 
between MST regions in a network.
Syntax: show spanning-tree
This command displays the switch’s global and regional 
spanning-tree status, plus the per-port spanning-tree 
operation at the regional level. Note that values for the 
following parameters appear only for ports connected to active 
devices: Designated Bridge, Hello Time, PtP, and Edge.
Syntax: show spanning-tree < port-list >
This command displays the spanning-tree status for the 
designated port(s). You can list data for a series of ports and 
port trunks by specifying the first and last port or trunk of any 
consecutive series of ports and trunks. For example, to display 
data for port A20-A24 and trk1, you would use this command: 
show spanning-tree a20-a42,trk1