show spanning-tree mst port summary

This command displays the settings of one or all ports within the specified multiple spanning tree instance. The parameter mstid indicates a particular MST instance. The parameter {unit/slot/port|all} indicates the desired switch port or all ports. Instead of unit/slot/port, lag lag-intf-num can be used as an alternate way to specify the LAG (Link Aggregation Group) interface. lag lag-intf-num can also be used to specify the LAG interface where lag-intf-num is the LAG port number.

If you specify 0 (defined as the default CIST ID) as the mstid, the status summary displays for one or all ports within the common and internal spanning tree.

Format show spanning-tree mst port summary mstid {unit/slot/port |lag lag-intf-num| all}
Mode
  • Privileged EXEC
  • User EXEC
Column
Meaning
MST Instance ID The MST instance associated with this port.
Interface unit/slot/port
STP Mode Whether spanning tree is enabled or disabled on the port.
Type Currently not used.
STP State The forwarding state of the port in the specified spanning tree instance.
Port Role The role of the specified port within the spanning tree.
Desc Whether the port is in loop inconsistent state or not. This field is blank if the loop guard feature is not available.

The following example shows CLI display output for the command in slot/port format.

(Extreme 220) (Routing) #show spanning-tree mst port summary 0 0/1
MST Instance ID................................ CST
            STP                  STP            Port
Interface   Mode   Type         State           Role       Desc
--------- -------- ------- ----------------- ---------- ----------
0/1       Enabled          Disabled          Disabled

The following example shows CLI display output for the command using a LAG interface number.

(Extreme 220) (Routing) #show spanning-tree mst port summary 0 lag 1
MST Instance ID................................ CST
            STP                  STP            Port
Interface   Mode   Type         State           Role       Desc
--------- -------- ------- ----------------- ---------- ----------
3/1       Enabled          Disabled          Disabled