Firmware downgrade
Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.
If you do need to do so, follow the procedure below:
Downgrading from 6.0.4 to 5.x.x release
Downgrading from 6.0.4 to 5.x.x release is not supported in general. Before downgrading, consult Fortinet Technical Support first.
If you do need to do so, follow these steps:
- Do not use
exec restore imagecommand. - Use the G option in the bootloader to reburn the image.
- Exec factory reset.
- Restore the configuration.