Fortinet MR1 - Manual (Page 508)

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Topology change - The value of the topology change parameter for the switch indicating if a topology
change is in progress on any port assigned to the selected MST instance. It takes a value if True or
False.
Designated root - The bridge identifier of the root bridge. It is made up from the bridge priority and the
base MAC address of the bridge
Root Path Cost - Path Cost to the Designated Root for this MST instance.
Root port - Port to access the Designated Root for this MST instance.
Command Buttons
Submit - Applies the new configuration and causes the changes to take effect. These changes will not
be retained across a power cycle unless a save configuration is performed.
Delete - Deletes the selected MST instance. All VLANs associated with the instance are associated with
the CST
Refresh - Refreshes the screen with most recent data.
Configuring each Port CST Configuration Page
Selection Criteria
Slot/Port - Selects one of the physical or LAG interfaces associated with VLANs associated with the
CST.
Configurable Data
Port Priority - The priority for a particular port within the CST. The port priority is set in multiples of 16.
For example, if you attempt to set the priority to any value between 0 and 15, it will be set to 0. If you
attempt to set any value between 16 and (2*16-1) it will be set to 16 and so on.
Admin Edge Port - Specifies if the specified port is an Edge Port within the CIST. It takes a value of
Enable or Disable, where the default value is Disable.