The Intelligent Platform Management Interface (IPMI) is a set of computer interface
specifications for an autonomous computer subsystem that provides
management and monitoring capabilities independently of the host
system's CPU, firmware (BIOS or UEFI) and operating system. IPMI defines a set of interfaces used by system administrators for out-of-band management of computer systems
and monitoring of their operation. For example, IPMI provides a way to
manage a computer that may be powered off or otherwise unresponsive by
using a network connection to the hardware rather than to an operating
system or login shell.
fence_ipmilan
http://linux.die.net/man/8/fence_ipmilan
fence_ipmilan is an I/O Fencing agent which can be used with machines
controlled by IPMI. This agent calls support software using ipmitool
(http://ipmitool.sf.net/).
To use fence_ipmilan with HP iLO 3 you have to enable lanplus
option (lanplus / -P) and increase wait after operation to 4 seconds
(power_wait=4 / -T 4)
fence_ipmilan accepts options on the command line as well as from
stdin. Fenced sends parameters through stdin when it execs the agent.
fence_ipmilan can be
run by itself with command line options. This is useful for testing and
for turning outlets on or off from scripts.
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