BMC-INFO(8) System Commands BMC-INFO(8)
bmc-info - display BMC information
Bmc-info displays BMC information, such as device version numbers, device support, and globally unique IDs (guids).
Listed below are general IPMI options, tool specific options, trouble shooting information, workaround information, examples, and known
issues. For a general introduction to FreeIPMI please see freeipmi(7).
The following options are general options for configuring IPMI communication and executing general tool commands.
-D IPMIDRIVER, --driver-type=IPMIDRIVER
Specify the driver type to use instead of doing an auto selection. The currently available outofband drivers are LAN and LAN_2_0,
which perform IPMI 1.5 and IPMI 2.0 respectively. The currently available inband drivers are KCS, SSIF, OPENIPMI, and SUNBMC.
Do not probe in-band IPMI devices for default settings.
Specify the in-band driver address to be used instead of the probed value. DRIVER-ADDRESS should be prefixed with "0x" for a hex
value and '0' for an octal value.
Specify the in-band driver device path to be used instead of the probed path.
Specify the in-band driver register spacing instead of the probed value. Argument is in bytes (i.e. 32bit register spacing = 4)
-h IPMIHOST1,IPMIHOST2,..., --hostname=IPMIHOST1,IPMIHOST2,...
Specify the remote host(s) to communicate with. Multiple hostnames may be separated by comma or may be specified in a range format;
see HOSTRANGED SUPPORT below.
-u USERNAME, --username=USERNAME
Specify the username to use when authenticating with the remote host. If not specified, a null (i.e. anonymous) username is
assumed. The user must have atleast USER privileges in order for this tool to operate fully.
-p PASSWORD, --password=PASSWORD
Specify the password to use when authenticationg with the remote host. If not specified, a null password is assumed. Maximum pass-
word length is 16 for IPMI 1.5 and 20 for IPMI 2.0.
Prompt for password to avoid possibility of listing it in process lists.
-k K_G, --k-g=K_G
Specify the K_g BMC key to use when authenticating with the remote host for IPMI 2.0. If not specified, a null key is assumed. To
input the key in hexadecimal form, prefix the string with '0x'. E.g., the key 'abc' can be entered with the either the string 'abc'
or the string '0x616263'
Prompt for k-g to avoid possibility of listing it in process lists.
Specify the session timeout in milliseconds. Defaults to 20000 milliseconds (20 seconds) if not specified.
Specify the packet retransmission timeout in milliseconds. Defaults to 1000 milliseconds (1 second) if not specified. The retrans-
mission timeout cannot be larger than the session timeout.
-a AUTHENTICATION-TYPE, --authentication-type=AUTHENTICATION-TYPE
Specify the IPMI 1.5 authentication type to use. The currently available authentication types are NONE, STRAIGHT_PASSWORD_KEY, MD2,
and MD5. Defaults to MD5 if not specified.
-I CIPHER-SUITE-ID, --cipher-suite-id=CIPHER-SUITE-ID
Specify the IPMI 2.0 cipher suite ID to use. The Cipher Suite ID identifies a set of authentication, integrity, and confidentiality
algorithms to use for IPMI 2.0 communication. The authentication algorithm identifies the algorithm to use for session setup, the
integrity algorithm identifies the algorithm to use for session packet signatures, and the confidentiality algorithm identifies the
algorithm to use for payload encryption. Defaults to cipher suite ID 3 if not specified. The following cipher suite ids are cur-
0 - Authentication Algorithm = None; Integrity Algorithm = None; Confidentiality Algorithm = None
1 - Authentication Algorithm = HMAC-SHA1; Integrity Algorithm = None; Confidentiality Algorithm = None
2 - Authentication Algorithm = HMAC-SHA1; Integrity Algorithm = HMAC-SHA1-96; Confidentiality Algorithm = None
3 - Authentication Algorithm = HMAC-SHA1; Integrity Algorithm = HMAC-SHA1-96; Confidentiality Algorithm = AES-CBC-128
6 - Authentication Algorithm = HMAC-MD5; Integrity Algorithm = None; Confidentiality Algorithm = None
7 - Authentication Algorithm = HMAC-MD5; Integrity Algorithm = HMAC-MD5-128; Confidentiality Algorithm = None
8 - Authentication Algorithm = HMAC-MD5; Integrity Algorithm = HMAC-MD5-128; Confidentiality Algorithm = AES-CBC-128
11 - Authentication Algorithm = HMAC-MD5; Integrity Algorithm = MD5-128; Confidentiality Algorithm = None
12 - Authentication Algorithm = HMAC-MD5; Integrity Algorithm = MD5-128; Confidentiality Algorithm = AES-CBC-128
17 - Authentication Algorithm = HMAC-SHA256; Integrity Algorithm = HMAC_SHA256_128; Confidentiality Algorithm = AES-CBC-128
-l PRIVILEGE-LEVEL, --privilege-level=PRIVILEGE-LEVEL
Specify the privilege level to be used. The currently available privilege levels are USER, OPERATOR, and ADMIN. Defaults to USER if
Specify an alternate configuration file.
-W WORKAROUNDS, --workaround-flags=WORKAROUNDS
Specify workarounds to vendor compliance issues. Multiple workarounds can be specified separated by commas. A special command line
flag of "none", will indicate no workarounds (may be useful for overriding configured defaults). See WORKAROUNDS below for a list of
Turn on debugging.
Output a help list and exit.
Output a usage message and exit.
Output the program version and exit.
The following options are specific to Bmc-info.
Display only device ID information.
Display only device guid.
Display only system info.
Display only channel information.
Attempt to interpret OEM data, such as event data, sensor readings, or general extra info, etc. If an OEM interpretation is not
available, the default output will be generated. Correctness of OEM interpretations cannot be guaranteed due to potential changes
OEM vendors may make in products, firmware, etc. See OEM INTERPRETATION below for confirmed supported motherboard interpretations.
The following options manipulate hostranged output. See HOSTRANGED SUPPORT below for additional information on hostranges.
Buffer hostranged output. For each node, buffer standard output until the node has completed its IPMI operation. When specifying
this option, data may appear to output slower to the user since the the entire IPMI operation must complete before any data can be
output. See HOSTRANGED SUPPORT below for additional information.
Consolidate hostranged output. The complete standard output from every node specified will be consolidated so that nodes with iden-
tical output are not output twice. A header will list those nodes with the consolidated output. When this option is specified, no
output can be seen until the IPMI operations to all nodes has completed. If the user breaks out of the program early, all currently
consolidated output will be dumped. See HOSTRANGED SUPPORT below for additional information.
-F NUM, --fanout=NUM
Specify multiple host fanout. A "sliding window" (or fanout) algorithm is used for parallel IPMI communication so that slower nodes
or timed out nodes will not impede parallel communication. The maximum number of threads available at the same time is limited by
the fanout. The default is 64.
Eliminate hosts determined as undetected by ipmidetect. This attempts to remove the common issue of hostranged execution timing out
due to several nodes being removed from service in a large cluster. The ipmidetectd daemon must be running on the node executing the
Always prefix output, even if only one host is specified or communicating in-band. This option is primarily useful for scripting
purposes. Option will be ignored if specified with the -C option.
Multiple hosts can be input either as an explicit comma separated lists of hosts or a range of hostnames in the general form: prefix[n-m,l-
k,...], where n < m and l < k, etc. The later form should not be confused with regular expression character classes (also denoted by ).
For example, foo does not represent foo1 or foo9, but rather represents a degenerate range: foo19.
This range syntax is meant only as a convenience on clusters with a prefixNN naming convention and specification of ranges should not be
considered necessary -- the list foo1,foo9 could be specified as such, or by the range foo[1,9].
Some examples of range usage follow:
foo[01-05] instead of foo01,foo02,foo03,foo04,foo05
foo[7,9-10] instead of foo7,foo9,foo10
foo[0-3] instead of foo0,foo1,foo2,foo3
As a reminder to the reader, some shells will interpret brackets ([ and ]) for pattern matching. Depending on your shell, it may be neces-
sary to enclose ranged lists within quotes.
When multiple hosts are specified by the user, a thread will be executed for each host in parallel up to the configured fanout (which can
be adjusted via the -F option). This will allow communication to large numbers of nodes far more quickly than if done in serial.
By default, standard output from each node specified will be output with the hostname prepended to each line. Although this output is read-
able in many situations, it may be difficult to read in other situations. For example, output from multiple nodes may be mixed together.
The -B and -C options can be used to change this default.
In-band IPMI Communication will be used when the host "localhost" is specified. This allows the user to add the localhost into the hos-
Most often, IPMI problems are due to configuration problems.
IPMI over LAN problems involve a misconfiguration of the remote machine's BMC. Double check to make sure the following are configured
properly in the remote machine's BMC: IP address, MAC address, subnet mask, username, user enablement, user privilege, password, LAN privi-
lege, LAN enablement, and allowed authentication type(s). For IPMI 2.0 connections, double check to make sure the cipher suite privilege(s)
and K_g key are configured properly. The bmc-config(8) tool can be used to check and/or change these configuration settings.
Inband IPMI problems are typically caused by improperly configured drivers or non-standard BMCs.
In addition to the troubleshooting tips below, please see WORKAROUNDS below to also if there are any vendor specific bugs that have been
discovered and worked around.
Listed below are many of the common issues for error messages. For additional support, please e-mail the <firstname.lastname@example.org> mailing
"username invalid" - The username entered (or a NULL username if none was entered) is not available on the remote machine. It may also be
possible the remote BMC's username configuration is incorrect.
"password invalid" - The password entered (or a NULL password if none was entered) is not correct. It may also be possible the password for
the user is not correctly configured on the remote BMC.
"password verification timeout" - Password verification has timed out. A "password invalid" error (described above) or a generic "session
timeout" (described below) occurred. During this point in the protocol it cannot be differentiated which occurred.
"k_g invalid" - The K_g key entered (or a NULL K_g key if none was entered) is not correct. It may also be possible the K_g key is not cor-
rectly configured on the remote BMC.
"privilege level insufficient" - An IPMI command requires a higher user privilege than the one authenticated with. Please try to authenti-
cate with a higher privilege. This may require authenticating to a different user which has a higher maximum privilege.
"privilege level cannot be obtained for this user" - The privilege level you are attempting to authenticate with is higher than the maximum
allowed for this user. Please try again with a lower privilege. It may also be possible the maximum privilege level allowed for a user is
not configured properly on the remote BMC.
"authentication type unavailable for attempted privilege level" - The authentication type you wish to authenticate with is not available
for this privilege level. Please try again with an alternate authentication type or alternate privilege level. It may also be possible the
available authentication types you can authenticate with are not correctly configured on the remote BMC.
"cipher suite id unavailable" - The cipher suite id you wish to authenticate with is not available on the remote BMC. Please try again with
an alternate cipher suite id. It may also be possible the available cipher suite ids are not correctly configured on the remote BMC.
"ipmi 2.0 unavailable" - IPMI 2.0 was not discovered on the remote machine. Please try to use IPMI 1.5 instead.
"connection timeout" - Initial IPMI communication failed. A number of potential errors are possible, including an invalid hostname speci-
fied, an IPMI IP address cannot be resolved, IPMI is not enabled on the remote server, the network connection is bad, etc. Please verify
configuration and connectivity.
"session timeout" - The IPMI session has timed out. Please reconnect. If this error occurs often, you may wish to increase the retransmis-
sion timeout. Some remote BMCs are considerably slower than others.
"device not found" - The specified device could not be found. Please check configuration or inputs and try again.
"driver timeout" - Communication with the driver or device has timed out. Please try again.
"message timeout" - Communication with the driver or device has timed out. Please try again.
"BMC busy" - The BMC is currently busy. It may be processing information or have too many simultaneous sessions to manage. Please wait and
"could not find inband device" - An inband device could not be found. Please check configuration or specify specific device or driver on
the command line.
"driver timeout" - The inband driver has timed out communicating to the local BMC or service processor. The BMC or service processor may be
busy or (worst case) possibly non-functioning.
With so many different vendors implementing their own IPMI solutions, different vendors may implement their IPMI protocols incorrectly. The
following describes a number of workarounds currently available to handle discovered compliance issues. When possible, workarounds have
been implemented so they will be transparent to the user. However, some will require the user to specify a workaround be used via the -W
The hardware listed below may only indicate the hardware that a problem was discovered on. Newer versions of hardware may fix the problems
indicated below. Similar machines from vendors may or may not exhibit the same problems. Different vendors may license their firmware from
the same IPMI firmware developer, so it may be worthwhile to try workarounds listed below even if your motherboard is not listed.
If you believe your hardware has an additional compliance issue that needs a workaround to be implemented, please contact the FreeIPMI
maintainers on <email@example.com> or <firstname.lastname@example.org>.
assumeio - This workaround flag will assume inband interfaces communicate with system I/O rather than being memory-mapped. This will work
around systems that report invalid base addresses. Those hitting this issue may see "device not supported" or "could not find inband
device" errors. Issue observed on HP ProLiant DL145 G1.
spinpoll - This workaround flag will inform some inband drivers (most notably the KCS driver) to spin while polling rather than putting the
process to sleep. This may significantly improve the wall clock running time of tools because an operating system scheduler's granularity
may be much larger than the time it takes to perform a single IPMI message transaction. However, by spinning, your system may be performing
less useful work by not contexting out the tool for a more useful task.
authcap - This workaround flag will skip early checks for username capabilities, authentication capabilities, and K_g support and allow
IPMI authentication to succeed. It works around multiple issues in which the remote system does not properly report username capabilities,
authentication capabilities, or K_g status. Those hitting this issue may see "username invalid", "authentication type unavailable for
attempted privilege level", or "k_g invalid" errors. Issue observed on Asus P5M2/P5MT-R/RS162-E4/RX4, Intel SR1520ML/X38ML, and Sun Fire
2200/4150/4450 with ELOM.
idzero - This workaround flag will allow empty session IDs to be accepted by the client. It works around IPMI sessions that report empty
session IDs to the client. Those hitting this issue may see "session timeout" errors. Issue observed on Tyan S2882 with M3289 BMC.
unexpectedauth - This workaround flag will allow unexpected non-null authcodes to be checked as though they were expected. It works around
an issue when packets contain non-null authentication data when they should be null due to disabled per-message authentication. Those hit-
ting this issue may see "session timeout" errors. Issue observed on Dell PowerEdge 2850,SC1425. Confirmed fixed on newer firmware.
forcepermsg - This workaround flag will force per-message authentication to be used no matter what is advertised by the remote system. It
works around an issue when per-message authentication is advertised as disabled on the remote system, but it is actually required for the
protocol. Those hitting this issue may see "session timeout" errors. Issue observed on IBM eServer 325.
endianseq - This workaround flag will flip the endian of the session sequence numbers to allow the session to continue properly. It works
around IPMI 1.5 session sequence numbers that are the wrong endian. Those hitting this issue may see "session timeout" errors. Issue
observed on some Sun ILOM 1.0/2.0 (depends on service processor endian).
intel20 - This workaround flag will work around several Intel IPMI 2.0 authentication issues. The issues covered include padding of user-
names, and password truncation if the authentication algorithm is HMAC-MD5-128. Those hitting this issue may see "username invalid", "pass-
word invalid", or "k_g invalid" errors. Issue observed on Intel SE7520AF2 with Intel Server Management Module (Professional Edition).
supermicro20 - This workaround flag will work around several Supermicro IPMI 2.0 authentication issues on motherboards w/ Peppercon IPMI
firmware. The issues covered include handling invalid length authentication codes. Those hitting this issue may see "password invalid"
errors. Issue observed on Supermicro H8QME with SIMSO daughter card. Confirmed fixed on newerver firmware.
sun20 - This workaround flag will work work around several Sun IPMI 2.0 authentication issues. The issues covered include invalid lengthed
hash keys, improperly hashed keys, and invalid cipher suite records. Those hitting this issue may see "password invalid" or "bmc error"
errors. Issue observed on Sun Fire 4100/4200/4500 with ILOM. This workaround automatically includes the "opensesspriv" workaround.
opensesspriv - This workaround flag will slightly alter FreeIPMI's IPMI 2.0 connection protocol to workaround an invalid hashing algorithm
used by the remote system. The privilege level sent during the Open Session stage of an IPMI 2.0 connection is used for hashing keys
instead of the privilege level sent during the RAKP1 connection stage. Those hitting this issue may see "password invalid", "k_g invalid",
or "bad rmcpplus status code" errors. Issue observed on Sun Fire 4100/4200/4500 with ILOM, Inventec 5441/Dell Xanadu II, Supermicro X8DTH,
Supermicro X8DTG, Intel S5500WBV/Penguin Relion 700, Intel S2600JF/Appro 512X, and Quanta QSSC-S4R//Appro GB812X-CN. This workaround is
automatically triggered with the "sun20" workaround.
integritycheckvalue - This workaround flag will work around an invalid integrity check value during an IPMI 2.0 session establishment when
using Cipher Suite ID 0. The integrity check value should be 0 length, however the remote motherboard responds with a non-empty field.
Those hitting this issue may see "k_g invalid" errors. Issue observed on Supermicro X8DTG, Supermicro X8DTU, and Intel S5500WBV/Penguin
Relion 700, and Intel S2600JF/Appro 512X.
No IPMI 1.5 Support - Some motherboards that support IPMI 2.0 have been found to not support IPMI 1.5. Those hitting this issue may see
"ipmi 2.0 unavailable" or "connection timeout" errors. This issue can be worked around by using IPMI 2.0 instead of IPMI 1.5 by specifying
--driver-address=LAN_2_0. Issue observed on HP Proliant DL 145.
The following motherboards are confirmed to have atleast some support by the --interpret-oem-data option. While highly probable the OEM
data interpretations would work across other motherboards by the same manufacturer, there are no guarantees. Some of the motherboards below
may be rebranded by vendors/distributors.
Dell Poweredge R610, Dell Poweredge R710, Intel SR870BN4/Tiger4
Get BMC information of the local machine.
# bmc-info -h ahost -u myusername -p mypassword
Get BMC information of a remote machine using IPMI over LAN.
# bmc-info -h mycluster[0-127] -u myusername -p mypassword
Get BMC information across a cluster using IPMI over LAN.
On older operating systems, if you input your username, password, and other potentially security relevant information on the command line,
this information may be discovered by other users when using tools like the ps(1) command or looking in the /proc file system. It is gener-
ally more secure to input password information with options like the -P or -K options. Configuring security relevant information in the
FreeIPMI configuration file would also be an appropriate way to hide this information.
In order to prevent brute force attacks, some BMCs will temporarily "lock up" after a number of remote authentication errors. You may need
to wait awhile in order to this temporary "lock up" to pass before you may authenticate again.
Report bugs to <email@example.com> or <firstname.lastname@example.org>.
Copyright (C) 2003-2012 FreeIPMI Core Team.
This program 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.
freeipmi.conf(5), freeipmi(7), bmc-config(8)
bmc-info 1.1.5 2012-06-15 BMC-INFO(8)