Using the BIG-IP Configuration utility, you can view a list of the interface IDs associated with a specific spanning tree instance.
If you are using MSTP, the interface IDs that appear in the list are the interfaces assigned to
the VLANs that you specified when you created the instance. If you are using STP or RSTP, the
interface IDs listed are those that the BIG-IP® system automatically
assigned to instance 0.
The list of interface IDs also displays the following information for each interface:
The STP instance ID
The external path cost
The port role