We are having various Fortinet Devices, and are build as cluster (either in Active/Active or Active/Passive). Is it okey if we add the Virtual IP so that we can moniotr both devices in the cluster or do we need to add individually.
I don't think you can monitor both the devices using virtual IP, only the active device can be monitored.
You can do both, it all come down to how your cluster is built. You can monitor both individually via the MGMT interface IP and as a cluster via the VIP. I sometimes tend to do both.