Firmware downgrade
Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.
If you do need to downgrade, follow the procedures below:
Downgrading from 6.4.3 to 5.x.x release
Downgrading from 6.4.3 to 5.x.x release is not supported in general. Before downgrading, consult Fortinet Technical Support first.
If you do need to downgrade, follow these steps:
- In the FortiVoice console, use the G option in the bootloader to reburn the image.
- Type exec factory reset.
- Restore the configuration.
Downgrading from 6.4.3 to 6.0.x release
Downgrading from 6.4.3 to 6.0.x release is not supported in general. Before downgrading, consult Fortinet Technical Support first.
If you do need to downgrade, follow these steps:
- In the FortiVoice console, use the G option in the bootloader to reburn the image.
- Type exec factory reset.
- Restore the configuration.