I don't see a way to configure the cluster FQDN for On Premise installation. I create a 6 nodes cluster (each nodes running on a physical server) and I'm only able to contact each node on their own IP instead of contacting the cluster on a "general FQDN". With this model, I'm to be are of which node is up, and which node is down.
Does somebody know how to achieve it, based on the sample configurations files provided with Service Fabric standalone installation package?
You need to add a network load balancer to your infrastructure for that. This will be used to route traffic to healthy nodes.