Changing FortiController interface speeds
To change front panel B1 and B2 interface speeds, from the GUI go to Switch > Base Channel and edit the b1 or b2 interface. Set the Speed to 10Gbps Full-duplex or 1Gpbs Full duplex and select OK. From the CLI enter the following command to change the speed of the B1 port.
config switch base-channel physical-port
edit b1
set speed {10000full | 1000full}
end
To change backplane fabric channel interface speeds, from the GUI go to Switch > Fabric Channel and edit a slot-1/2 to slot 14 interface. Set the Speed to 40Gpbs Full-duplex, 10Gbps Full-duplex or 1Gpbs Full duplex and select OK. From the CLI enter the following command to change the speed of the slot-4 port.
config switch fabric-channel physical-port
edit slot-4
set speed {40000full | 10000full | 1000full}
end