FortiGate units are shipped with firmware installed. Usually firmware upgrades are performed through the web-based manager or by using the CLI
execute restore command. From the console, you can also interrupt the FortiGate unit’s boot-up process to load firmware using the BIOS firmware that is a permanent part of the unit.
Using the BIOS, you can:
- view system information
- format the boot device
- load firmware and reboot
- reboot the FortiGate unit from the backup firmware, which then becomes the default firmware