VPN tunnels lost after 7.0.5 → 7.2.2 upgrade on FortiGate 200F
After upgrading the firmware of the FortiGate 200F in an HA setup from 7.0.5 to 7.2.2, the VPN tunnel configuration was lost. Ideally, we would like to upgrade all the way to version 7.4.3. Please advise on how to prevent the VPN tunnel settings from being erased during the upgrade, and whether there is a recommended upgrade path that avoids this issue.
Additionally, the FortiGate 200F is connected to a media converter (ONU) provided by the ISP on the WAN side. Before the upgrade, the device was able to automatically obtain an IP address even with the interface set to 0.0.0.0. However, after the upgrade, it no longer receives an IP address.
We reverted the firmware to the previous version and restored the backed-up configuration, but the IP address is still not being assigned. Although the configuration matches exactly with the pre-upgrade state, we suspect that some internal setting may have changed.
We would greatly appreciate your guidance on how to ensure the VPN tunnel settings are preserved during the upgrade, and how to restore automatic IP address assignment from the ONU.
