I recently had a POC where we were required to demonstrate an HA configuration of the Private ThreatCloud in which traffic and failover was controlled by a pair of load balancers.
In this POC, the requirement was that devices in a specific site should only talk with the PTC within their site unless it went down then the load balancer would redirect the PTC requests to a PTC in a different site.
I wanted to share a video that highlights the configuration and performs a couple of tests of adding gateways to the PTC in addition to simulating a failover.