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FREEIPMI(7) Overview FREEIPMI(7)
NAME
FreeIPMI - FreeIPMI overview
Introduction
FreeIPMI provides in-band and out-of-band IPMI software based on the IPMI v1.5/2.0 speci-
fication.
What is IPMI?
The IPMI specification defines a set of interfaces for platform management and is imple-
mented by a number vendors for system management. The features of IPMI that most users
will be interested in are sensor monitoring, system event monitoring, power control, and
serial-over-LAN (SOL). The FreeIPMI tools and libraries listed below should provide users
with the ability to access and utilize these and many other features of IPMI.
Getting Started with IPMI
IPMI can be used in-band (i.e. running on a machine locally) or out-of-band (i.e. connect-
ing remotely).
Most FreeIPMI tools can operate in-band by using one of the in-band drivers included.
These in-band drivers include a userspace KCS interface driver, a SSIF driver through the
Linux SSIF device (i.e. /dev/i2c-0), the OpenIPMI Linux kernel driver (i.e. /dev/ipmi0),
the Sun/Solaris BMC driver (i.e. /dev/bmc), and the Intel DCMI/MEI driver (i.e.
/dev/dcmi). If your system requires the use of installed drivers, those appropriate mod-
ules must be installed ahead of time. However, most systems should automatically load
these drivers when appropriate.
Under most scenarios, the FreeIPMI tools should automatically discover which in-band in-
terface to use and the proper settings to use. Users may execute the tools on the command
line to begin using them. Some motherboards may require you to determine driver type, ad-
dresses, paths, etc. on your own and pass them as command line options to the tools. You
may use ipmi-locate(8) to help determine this information. Other tools such as dmide-
code(8) may also provide this information.
To use IPMI out-of-band with tools such as ipmipower(8) or ipmi-sensors(8), the remote ma-
chine's BMC must first be configured for out of band communication. Typically, this in-
volves setting a username, password, IP address, MAC address, and a few other parameters.
This can be done using the tool ipmi-config(8). Additional information on how to config-
ure with ipmi-config(8) can be found in the ipmi-config.conf(5) manpage. Some vendors may
pre-configure their motherboards with default values so that ipmi-config(8) can be used
remotely to configure the machine. However, most of the time, the BMC must be configured
in-band before out-of-band access can be allowed (for example, the correct IP address and
MAC address must be configured).
In order to remotely connect to a machine, you typically must specify the host, username,
and password for the tool in order to connect. Depending on configuration settings, a K_g
key, privilege level, authentication type, cipher suite id, or protocol version may need
to be specified.
Some vendors may have not implemented IPMI properly and a workaround must be specified
into FreeIPMI to ensure the tool can execute properly. For example, a fair number of ven-
dors have populated their FRU records with invalid checksums. To properly ignore these set
of checksums a skipchecks workaround has been added to ipmi-fru(8). Please see each of
the tool manpages to see a list of available workarounds.
Additional information, examples, and general trouble-shooting can be found in each of the
tool manpages.
General Use
The primary tools that most users of FreeIPMI will be interested in for system management
are the following:
ipmi-sensors
A tool to read IPMI sensor readings to aid in system monitoring.
ipmi-sel
A tool to read and manage IPMI System Event Log (SEL) records to aid in system debugging.
ipmipower
A tool for remote power control.
ipmiconsole
A tool for Serial-over-Lan (SOL) console access.
Many other tools and libraries are listed below that cover additional features and areas
of IPMI.
Additional information, examples, and general trouble-shooting can be found in each of the
tool manpages.
Configuration
In order to avoid typing in a long list of command line options to specify IPMI communica-
tion requirements everytime a command is executed (e.g. driver paths, usernames, pass-
words, etc.), an alternate set of default values can be set for most FreeIPMI tools in the
FreeIPMI configuration file. See freeipmi.conf(5) for more information.
HPC Support
Much of FreeIPMI was written with HPC support in mind. Ipmi-config(8) comes with file in-
put/output support so that configuration can be copied and verified across nodes in a
cluster. Most tools (like ipmipower(8) and ipmi-sensors(8) ) come with hostrange support
so multiple hosts can be specified on the command line at the same time and IPMI can be
executed against the hosts in parallel. See tool manpages for more information. Also see
the document freeipmi-hostrange.txt for detailed usage and explanation. Ipmi-sensors(8)
and the libipmimonitoring(3) library support the ability to interpret sensor readings as
well as just reporting them. By mapping sensor readings into NOMINAL, WARNING, or CRITICAL
states, it makes monitoring sensors easier across large numbers of nodes.
Development
For information on the libraries that can be used to program IPMI applications with,
please see libfreeipmi(3), libipmiconsole(3), libipmimonitoring(3), and libipmidetect(3).
Or see the document freeipmi-libraries.txt.
Project Tools
The following tools are distributed and supported by FreeIPMI.
bmc-info
A tool to read information about a BMC such as device version numbers, device support, and
globally unique IDs (guids).
bmc-watchdog
A tool/daemon to manage a BMC Watchdog. This tool is typically used for system timeout
management and automatic system restarts in the event of a system crash.
ipmi-chassis
A tool to manage/monitor a chassis, such as chassis power, identification (i.e. LED con-
trol), and status.
ipmi-fru
A tool to read field replaceable unit (FRU) information from a motherboard/machine.
ipmi-sel
A tool to read and manage IPMI System Event Log (SEL) records. SEL records store system
event information and may be useful for debugging problems.
ipmi-sensors
A tool to read IPMI sensor readings and sensor data repository (SDR) information.
ipmipower
A tool for remote power control.
ipmiconsole
A tool for Serial-over-Lan (SOL) console access.
ipmi-config
A tool to configure BMC and IPMI information. In can be used to configured usernames,
passwords, networking information, security, Serial-over-LAN (SOL), Platform Event Filter-
ing (PEF), boot devices, power restoration policy, sensor thresholds, sensor events, and
many more configuration options.
ipmi-raw
A tool that provides hex input/output of IPMI commands.
ipmi-locate
A tool that can probe for information about the location of a BMC device, such as device
addresses.
ipmi-pet
A tool to parse and interpret Platform Event Traps (PET).
ipmi-dcmi
A tool to perform Data Center Manageability Interface (DCMI) IPMI extension commands. Sup-
ports extensions for asset management and power usage management.
bmc-device
A tool to perform advanced BMC commands, such as resetting the BMC, configuring ACPI, con-
figuring SDR/SEL time, manually generating events, re-arming sensors, and configuring man-
ufacturer settings.
ipmiping
An IPMI ping tool for debugging.
rmcpping
A RMCP ping tool for debugging.
ipmi-oem
An IPMI tool for OEM specific commands.
ipmidetect/ipmidetectd
A tool and daemon for IPMI node detection.
ipmiseld
A daemon that regularly polls the SEL and stores the events to the local syslog.
Additional information, examples, and general trouble-shooting can be found in each of the
tool manpages.
Project Libraries
The following libraries are distributed and supported by FreeIPMI.
libfreeipmi
A C library that includes KCS, SSIF, and OpenIPMI Linux, and Solaris BMC drivers, IPMI 1.5
and IPMI 2.0 LAN communication interfaces, IPMI packet building utilities, IPMI command
utilities, and utilities for reading/interpreting/managing IPMI. This library is for pro-
grammers intimately familiar with the IPMI protocol and IPMI specification. Most users
may wish to use the libraries listed below.
libipmiconsole
A library for Serial-over-Lan (SOL) console access. SOL console access is abstracted into
a file descriptor interface, so users may read and write console data through a file de-
scriptor.
libipmimonitoring
A library for sensor and system event log (SEL) monitoring that abstracts away most IPMI
details. Interpretation of those sensors and events is abstracted into an API with an it-
erator interface.
libipmidetect
A library for IPMI node detection.
REPORTING BUGS
Report bugs to <freeipmi-users AT gnu.org> or <freeipmi-devel AT gnu.org>.
COPYRIGHT
Copyright (C) 2003-2015 FreeIPMI Core Team.
FreeIPMI is free software; you can redistribute it and/or modify it under the terms of the
GNU General Public License as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.
SEE ALSO
libfreeipmi(3), libipmiconsole(3), libipmidetect(3), libipmimonitoring(3),
freeipmi.conf(5), bmc-device(8), bmc-info(8), bmc-watchdog(8), ipmi-chassis(8), ipmi-con-
fig(8), ipmi-fru(8), ipmi-locate(8), ipmi-oem(8), ipmi-pet(8), ipmi-raw(8), ipmi-sel(8),
ipmi-sensors(8), ipmiconsole(8), ipmidetect(8), ipmiping(8), ipmipower(8), rmcpping(8)
http://www.gnu.org/software/freeipmi/
FreeIPMI 1.6.4 2019-08-21 FREEIPMI(7)
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On Apache
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