Ping directives are given to declare PingNodes to Heartbeat.
The syntax of the ping directive is simple:
ping ip-address ...
Each IP address listed in a ping directive is considered to be independent. That is, connectivity to each node is considered to be equally important.
In order to declare that a group of nodes are equally qualified for a particular function, and that the presence of any of them indicates successful communication, use the PingGroupDirective.