Fence Agents for Red Hat Cluster - kdump agent

 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_kdump is an I/O fencing agent to be used with the kdump crash recovery
 service. When the fence_kdump agent is invoked, it will listen for a message
 from the failed node that acknowledges that the failed node it executing the
 kdump crash kernel. Note that fence_kdump is not a replacement for traditional
 fencing methods. The fence_kdump agent can only detect that a node has entered
 the kdump crash recovery service. This allows the kdump crash recovery service
 complete without being preempted by traditional power fencing methods.