Fortinet FortiGate 1U Quick Start Manual page 87

Upgrading the firmware for
the HA cluster
When a new version of the FortiOS firmware
becomes available, upgrade the firmware on
the primary FortiGate unit and the backup
FortiGate unit will upgrade automatically.
Go to System > Dashboard > Status
and view the System Information widget.
Select Upgrade beside the Firmware
Version listing.
The firmware will load on the primary
FortiGate unit, and then on the backup unit.
Go to Log & Report > Event Log >
System.
Go to System > Dashboard > Status. View
the System Information widget again. Both
FortiGate units should have the new firmware
installed.
Adding a backup FortiGate unit to improve reliability 67