There are three enhancements in the GUI for managed FortiSwitch units:
The port health is now reported on the Diagnostics and Tools pane.
Go to WiFi & Switch Controller > Managed FortiSwitches, right-click a FortiSwitch unit in Topology view or List view, and select Diagnostics and Tools. When there are error frames, the port health is shown as Poor. When there are no error frames, the port health is shown as Good.
The new Legend button in the General pane displays the Health Thresholds pane, which lists the thresholds for the good, fair, and poor ratings of the general health, port health, and MC-LAG health.
You can now clear port counters by going to the WiFi & Switch Controller > FortiSwitch Ports page, right-clicking a port, and selecting Clear port counters.