Hi,
can so give me a explanation, what for i need the ping-node.

Why do I need the ping-node, the both servers are sending a heartbeat to each other to look if the other is still alive. If one of them unreachable, the other take over the active part?
And whats the role of the ping-node in this scenario?

The Active Server sends ICMP requests to it?
The Passive Server also?

what happens if the ping node goes down?

Thanks a lot!