With certain FortiGate models, a transceiver may not successfully connect immediately when plugged into a port. Configuration via the CLI is required.
This recipe shows how to configure the media type when ports using FG-TRAN-CFP2-LR4 will not become active. FortiGate models requiring this configuration with this transceiver are: FG-3800D, FG-3810D, FG-3815D, FIM-7910E, and FIM-7920E.
Configuring media type for FG-3800D, FG-3810D, and FG-3815D
Connect to the CLI of your FortiGate system using the management IP and enter the command below. The interface and transceiver indicated are examples. Be sure to enter the correct interface name and media type.
config system interface edit port 1 set mediatype CFP2-LR4 end
After you enter the CLI command, the FortiGate will reboot and the link to the transceiver is active.
Configuring media type for FIM-7910E & FIM-7920E
A manual reboot is required when changing the media type for the FIM-7910E but not for the FIM-7920E. The interface and transceiver indicated are examples. Be sure to enter the correct interface name and media type.
config system interface edit "2-C1" set mediatype lr next end execute reboot =====> only necessary for the FIM-7910E
For more details, consult the Fortinet Document Library’s hardware manuals.