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_wti is an I/O Fencing agent which can be used with the WTI Network Power Switch (NPS). It logs into an NPS via telnet or ssh and boots a specified plug. Lengthy telnet connections to the NPS should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions.