Fence Agents for Red Hat Cluster - IBM RSA 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_rsa is an I/O Fencing agent which can be used with the IBM RSA II
 management interface. It logs into an RSA II device via telnet and reboots the
 associated machine. Lengthy telnet connections to the RSA II device should be
 avoided while a GFS cluster is running because the connection will block any
 necessary fencing actions.