Viewing status for a specific MST instance
The following commands display the MSTP statistics for a specified MST instance.
Syntax:
show spanning-tree instance [ist | 1..16]
Displays the MSTP statistics for either the IST instance or a numbered MST instance running on the switch.
Syntax:
show spanning-tree instance [ist | 1..16] detail
Displays status on all active ports for a specific instance of MSTP.
Syntax:
show spanning-tree port-list instance [ist | 1..16] detail
Viewing status for a specific instance of an MSTP
This shows how to display detailed status for all active ports for a specific instance of MSTP.
switch(config)# show spanning-tree instance 11
MST Instance Information
Instance ID : 11
Mapped VLANs : 111,300
Switch Priority : 32768
Topology Change Count : 2
Time Since Last Change : 4 mins
Regional Root MAC Address : 1cc1de-cfbc80
Regional Root Priority : 32768
Regional Root Path Cost : 400000
Regional Root Port : This switch is root
Remaining Hops : 20
Designated
Port Type Cost Priority Role State Bridge
----- --------- --------- -------- ---------- ---------- -------------
1 10/100TX 200000 128 Root Forwarding 1cc1de-cfbc80
2 10/100TX 200000 128 Designated Forwarding 1cc1de-02a700
3 10/100TX Auto 112 Designated Forwarding 1cc1de-02a700
4 10/100TX Auto 128 Disabled Disabled
. . . . . .