Hi Slick, We have been trying to configure HA Cluster in our lab environment. We have already tried on two architecture: i) Three sites as an Active. ii) Active/Passive as in DC and Standalone (Active) as in DR We raised multiple tickets in support portals but none of the representative were able to support effectively on this. What actually HA Cluster does? If the primary firewall goes down, it is responsible for session synchronization to the cluster members and traffic should to transferred to another member on the cluster, right? Since, configuration on all of the devices are same. We got ARP conflict on each of the firewall in the cluster. But, we assumed that it would be managed by the clustering itself right? We got some ip conflict related issues. The KB we referred is: https://docs.paloaltonetworks.com/pan-os/10-0/pan-os-admin/high-availability/ha-clustering-overview
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