This article describes that FortiGate does not respond to ARP messages sent by the end devices and cannot access GUI.
Scope
FortiGate.
Solution
When trying to access FortiGate GUI, the connection times out.
On FortiGate, there are only incoming ARP requests because port2 belongs to the down LAG interface.
Remove port2 from LAG interface JCI_HA that shows down.
Now, try again.
