Red Hat Fence Agents is a collection of scripts to handle remote power management for several devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster.

fence_heuristics_ping uses ping-heuristics to control execution of another fence agent on the same fencing level.

This is not a fence agent by itself. Its only purpose is to enable/disable another fence agent that lives on the same fencing level but after fence_heuristics_ping.