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_ifmib is an I/O Fencing agent which can be used with any SNMP IF-MIB capable device.

It was written with managed ethernet switches in mind, in order to fence iSCSI SAN connections. However, there are many devices that support the IF-MIB interface. The agent uses IF-MIB::ifAdminStatus to control the state of an interface.