Fortinet Document Library

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Table of Contents

Firmware downgrade

Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.

If you do need to downgrade, follow the procedure below:

Downgrading from 6.4.0 to 5.x.x release

Downgrading from 6.4.0 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:

  1. Do not use exec restore image command.
  2. Use the G option in the bootloader to reburn the image.
  3. Exec factory reset.
  4. Restore the configuration.

Firmware downgrade

Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.

If you do need to downgrade, follow the procedure below:

Downgrading from 6.4.0 to 5.x.x release

Downgrading from 6.4.0 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:

  1. Do not use exec restore image command.
  2. Use the G option in the bootloader to reburn the image.
  3. Exec factory reset.
  4. Restore the configuration.