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_xenapi is an I/O Fencing agent used on Citrix XenServer hosts. It uses the XenAPI, supplied by Citrix, to establish an XML-RPC session to a XenServer host. Once the session is established, further XML-RPC commands are issued in order to switch on, switch off, restart and query the status of virtual machines running on the host.