Please note that for the HA between the physical hardware device has to be the same model, you cannot form HA between different models. Since they have different physical interface, so it is not getting sync and logs shows out of sync .
The requirements for a HA are to have the same: -Firmware -Hardware model -Fortiguard, Forticloud and Forticlient licenses -Hard drive capacity and partitions -Operating mode.
ignore-hardware-revision is ignore the generation revision level, between cluster with 1500D Gen1 and 1500D Gen2 hardware revision models not for different models.
FortiGate HA configuration requires a specific setup and devices.
First, the configuration requires at leasttwo, but up to four, FortiGate devices with the same:
Hardware model and VM license
FortiGuard, FortiCloud, and FortiClient licenses
Hard drive capacity and partitions
Operating mode (transparent or - NAT)
From 6.0 Handbook.
In some cases, you may be able to form a cluster if different FortiGates have different firmware builds, different VDOM configurations, and are in different operating modes. However, if you encounter problems they may be resolved by installing the same firmware build on each unit and give them the same VDOM configuration and same operating mode.
But in Study Guide, v7.0. it shows it requires at least two criteria to form HA and whereas the v6.0 handbook, tells that you can form an HA cluster with different Fortigate.
I have done HA with two similar criteria of the same firmware and the same operating mode. All, the configurations except for interface "a and b" were synchronized, and seamless failover was achieved like normal HA.
Would you please, correct me on where am I going wrong here?
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