Firmware [portable] | Fortigate

Occasionally, old syntax is deprecated. The upgrade may have disabled certain CLI commands without telling you. Run:

Corrupt config after schema migration, or incompatible feature enabled. Fix: Boot into Maintenance Mode (Press any key during BIOS countdown). Do a TFTP restore of the old firmware, then restore a backup config from before the upgrade. fortigate firmware

Steps to downgrade:

No more bug fixes or features, only critical security patches. EOSL: No support at all. Occasionally, old syntax is deprecated