Some FortiGate platforms have gone through multiple hardware versions. In some cases the hardware changes between versions have meant that by default you cannot form a cluster if the FortiGate units in the cluster have different hardware versions. If you run into this problem you can use the following command on each FortiGate unit to cause the cluster to ignore different hardware versions:

This command is only available on FortiGate units that have had multiple hardware revisions. By default the command is set to prevent FortiOS from forming clusters between FortiGate units with different hardware revisions. You can enable this command to be able to create a cluster consisting of FortiGate units with different hardware revisions. Use the status option to verify the whether ignoring hardware revisions is enabled or disabled.

Affected hardware models include: