Provided by: freeipmi-tools_1.6.13-3_amd64 
NAME
ipmipower - IPMI power control utility
SYNOPSIS
ipmipower [OPTION...]
DESCRIPTION
Ipmipower allows users to remotely power on, off, cycle, hard reset, get a power status
query, perform a pulse diagnostic interrupt, or initiate a soft-shutdown of the OS via
ACPI through the IPMI over LAN protocol.
When a power command (--on, --off, --cycle, --reset, --stat, --pulse, or --soft) is
specified on the command line, Ipmipower will attempt to run the power command on all
hostnames listed on the command line then exit.
If no power commands are specified on the command line, ipmipower will run in interactive
mode. Interactive mode gives the user a command line interface to enter various commands.
Details of the interactive command line interface can be found below under INTERACTIVE
COMMANDS.
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).
GENERAL OPTIONS
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.
-h IPMIHOST1,IPMIHOST2,..., --hostname=IPMIHOST1[:PORT],IPMIHOST2[:PORT],...
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. An
optional port can be specified with each host, which may be useful in port
forwarding or similar situations. If specifying an IPv6 address and port, use the
format [ADDRESS]:PORT.
-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
OPERATOR privileges to run the --on, --off, --reset, --cycle, --pulse, or --soft
power control commands. The user must have atleast USER privileges to determine the
power status of the machine through --stat.
-p PASSWORD, --password=PASSWORD
Specify the password to use when authenticationg with the remote host. If not
specified, a null password is assumed. Maximum password length is 16 for IPMI 1.5
and 20 for IPMI 2.0.
-P, --password-prompt
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'
-K, --k-g-prompt
Prompt for k-g to avoid possibility of listing it in process lists.
--session-timeout=MILLISECONDS
Specify the session timeout in milliseconds. Defaults to 20000 milliseconds (20
seconds) if not specified.
--retransmission-timeout=MILLISECONDS
Specify the packet retransmission timeout in milliseconds. Defaults to 400
milliseconds (0.4 seconds) if not specified.
-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 currently supported:
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
15 - Authentication Algorithm = HMAC-SHA256; Integrity Algorithm = None;
Confidentiality Algorithm = None
16 - Authentication Algorithm = HMAC-SHA256; Integrity Algorithm = HMAC_SHA256_128;
Confidentiality Algorithm = None
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 OPERATOR if not specified.
--config-file=FILE
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 available workarounds.
--debug
Turn on debugging.
-?, --help
Output a help list and exit.
--usage
Output a usage message and exit.
-V, --version
Output the program version and exit.
IPMIPOWER OPTIONS
The following options are specific to ipmipower.
-n, --on
Power on the target hosts.
-f, --off
Power off the target hosts.
-c, --cycle
Power cycle the target hosts.
-r, --reset
Reset the target hosts.
-s, --stat
Get power status of the target hosts.
--pulse
Send power diagnostic interrupt to target hosts.
--soft Initiate a soft-shutdown of the OS via ACPI.
--on-if-off
The IPMI specification does not require the power cycle or hard reset commands to
turn on a machine that is currently powered off. This option will force ipmipower
to issue a power on command instead of a power cycle or hard reset command if the
remote machine's power is currently off.
--wait-until-on
The IPMI specification allows power on commands to return prior to the power on
actually taking place. This option will force ipmipower to regularly query the
remote BMC and return only after the machine has powered on.
--wait-until-off
The IPMI specification allows power off commands to return prior the power off
actually taking place. This option will force ipmipower to regularly query the
remote BMC and return only after the machine has powered off.
--oem-power-type=OEM-POWER-TYPE
This option informs ipmipower to initiate power control operations via an IPMI OEM
specific power control extension. The currently available POWERTYPEs are NONE and
C410X. Please see OEM POWER EXTENSIONS below for additional information.
IPMIPOWER ADVANCED NETWORK OPTIONS
The following options are used to change the networking behavior of ipmipower.
--retransmission-wait-timeout=MILLISECONDS
Specify the retransmission wait timeout length in milliseconds. The retransmission
wait timeout is similar to the retransmission timeout above, but is used
specifically for power completion verification with the --wait-until-on and
--wait-until-off options. Defaults to 500 milliseconds (0.5 seconds).
--retransmission-backoff-count=COUNT
Specify the retransmission backoff count for retransmissions. After ever COUNT
retransmissions, the retransmission timeout length will be increased by another
factor. Defaults to 8.
--ping-interval=MILLISECONDS
Specify the ping interval length in milliseconds. When running in interactive mode,
RMCP (Remote Management Control Protocol) discovery messages will be sent to all
configured remote hosts every MILLISECONDS to confirm their support of IPMI. Power
commands cannot be sent to a host until it is discovered (or re-discovered if
previously lost). Defaults to 5000 milliseconds (5 seconds). Ping discovery
messages can be disabled by setting this value to 0. RMCP ping discovery messages
are automatically disabled in non-interactive mode.
--ping-timeout=MILLISECONDS
Specify the ping timeout length in milliseconds. When running in interactive mode,
RMCP (Remote Management Control Protocol) messages discovery will be sent to all
configured remote hosts to confirm their support of IPMI. A remote host is
considered undiscovered if the host does not respond in MILLISECONDS time. Defaults
to 30000 milliseconds (30 seconds). The ping timeout cannot be larger than the ping
interval.
--ping-packet-count=COUNT
Specify the ping packet count size. Defaults to 10. See the --ping-percent-fR
option below for more information on this option.
--ping-percent=PERCENT
Specify the ping percent value. Defaults to 50. Since IPMI is based on UDP, it is
difficult for ipmipower to distinguish between a missing machine and a bad (or
heavily loaded) network connection in interactive mode. when running in interactive
mode. For example, suppose a link consistently drops 80% of the packets to a
particular machine. The power control operation may have difficulty completing,
although a recent pong response from RMCP makes ipmipower believe the machine is up
and functioning properly. The ping packet count and percent options are used to
alleviate this problem. Ipmipower will monitor RMCP ping packets in packet count
chunks. If ipmipower does not receive a response to greater than ping percent of
those packets, ipmipower will assume the link to this node is bad and will not send
power control operations to that node until the connection is determined to be
reliable. This heuristic can be disabled by setting either the ping packet count or
ping percent to 0. This feature is not used if ping interval is set to 0.
--ping-consec-count=COUNT
Specify the ping consecutive count. This is another heuristic used to determine if
a node should be considered discovered, undiscovered, or with a bad connection. If
a valid RMCP pong response was received for the last COUNT ping packets, a node
will be considered discovered, regardless of other heuristics listed above.
Defaults to 5. This heuristic can be disabled by setting this value to 0. This
feature is not used if other ping features described above are disabled.
HOSTRANGED OPTIONS
The following options manipulate hostranged output. See HOSTRANGED SUPPORT below for
additional information on hostranges.
-B, --buffer-output
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.
-C, --consolidate-output
Consolidate hostranged output. The complete standard output from every node
specified will be consolidated so that nodes with identical 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. Indicates the maximum number of power control
operations that can be executed in parallel.
-E, --eliminate
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 command.
--always-prefix
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.
INTERACTIVE COMMANDS
Ipmipower provides the following interactive commands at the ipmipower> prompt. Before
any power commands (on, off, cycle, reset, stat, pulse, or soft) can be used, hostnames
must be configured into ipmipower, either through the command prompt or the hostname
command below. The parameters and options to the commands below mirror their appropriate
command line options.
hostname [IPMIHOST(s)]
Specify a new set of hosts. No input to unconfigure all hosts.
username [USERNAME]
Specify a new username. No input for null username.
password [PASSWORD]
Specify a new password. No input for null password.
k_g [K_G]
Specify a new K_g BMC Key. No input for null key. Prefix with '0x' to enter a key
in hexadecimal
ipmi-version IPMIVERSION
Specify the ipmi version to use.
session-timeout MILLISECONDS
Specify a new session timeout length.
retransmission-timeout MILLISECONDS
Specify a new retransmiision timeout length.
authentication-type AUTHENTICATION-TYPE
Specify the authentication type to use.
cipher-suite-id CIPHER-SUITE-ID
Specify the cipher suite id to use.
privilege-level PRIVILEGE-LEVEL
Specify the privilege level to use.
workaround-flags WORKAROUNDS
Specify workaround flags.
debug [on|off]
Toggle debug output.
on [IPMIHOST(s)]
Turn on all configured hosts or specified hosts.
off [IPMIHOST(s)]
Turn off all configured hosts or specified hosts.
cycle [IPMIHOST(s)]
Power cycle all configured hosts or specified hosts.
reset [IPMIHOST(s)]
Reset all configured hosts or specified hosts.
stat [IPMIHOST(s)]
Query power status for all configured hosts or specified hosts.
pulse [IPMIHOST(s)]
Pulse diagnostic interrupt all configured hosts or specified hosts.
soft [IPMIHOST(s)]
Initiate a soft-shutdown for all configured hosts or specified hosts.
identify-on [IPMIHOST(s)]
Turn on physical system identification.
identify-off [IPMIHOST(s)]
Turn off physical system identification.
identify-status [IPMIHOST(s)]
Query physical system identification status.
on-if-off [on|off]
Toggle on-if-off functionality.
wait-until-on [on|off]
Toggle wait-until-on functionality.
wait-until-off [on|off]
Toggle wait-until-off functionality.
retransmission-wait-timeout MILLISECONDS
Specify a new retransmission wait timeout length.
retransmission-backoff-count COUNT
Specify a new retransmission backoff count.
ping-interval MILLISECONDS
Specify a new ping interval length.
ping-timeout MILLISECONDS
Specify a new ping timeout length.
ping-packet-count COUNT
Specify a new ping packet count.
ping-percent PERCENT
Specify a new ping percent.
ping-consec-count COUNT
Specify a new ping consec count.
buffer-output [on|off]
Toggle buffer-output functionality.
consolidate-output [on|off]
Toggle consolidate-output functionality.
fanout COUNT
Specify a fanout.
always-prefix [on|off]
Toggle always-prefix functionality.
help Output help menu.
version
Output version.
config Output the current configuration.
quit Quit program.
OEM POWER EXTENSIONS
Some motherboards include IPMI OEM extensions for alternate power control mechanisms. For
example, these power control mechanisms may allow you to power control a sub-device within
the system rather than the entire system itself.
By specifying an OEM power type via --oem-power-type on the command line or
freeipmi.conf(5), you can instruct ipmipower to execute alternate power control
implementations over the standard ones. Depending on the OEM extension, some power control
commands may no longer be available. For example, an OEM extension may allow on but not
cycle. Specific ipmipower options may not longer function either.
Some OEM extensions may require additional arguments for their power control action, such
as a sub-device identifier. Additional arguments can be provided by appending a plus sign
('+') and the extra information to the end of the hostname. This can be done on the
command line or in interactive mode. For example, the hostname mynode+18 would indicate
the power control operation should be sent to the host mynode, and 18 is the identifier of
a possible sub-device to be power controlled. The --consolidate-output option is commonly
disabled when using an OEM power control that requires extra arguments.
Because OEM power control may involve subtypes, it is possible a user may wish to power
control multiple sub-devices on the same host. For example, you might specify the hosts
mynode+1,mynode+2, indicating to power control subdevice 1 and 2 on mynode. Because many
BMCs cannot handle multiple IPMI sessions, power control operations to the same host will
be serialized internally by ipmipower.
The following are the current OEM power types available, along with information on the
systems they work with and the power control operations available.
C410X This OEM power type supports the power control of PCIe slots on Dell Poweredge
C410x systems. It supports on, off, and stat. The PCIe slot number ranges from 1-16
and must always be specified when attempting to power control with this extension.
For example, the hostname mynode+2 would inform ipmipower to operate on slot number
2 on mynode. The C410x appears to have difficulty handling new slot power control
requests until prior ones have completed. Users may wish to strongly consider using
the --wait-until-on and --wait-until-off options if multiple slots will be power
controlled in short succession.
NONE This informs ipmipower that no OEM power type extension is to be used and standard
IPMI power control is used. This is the default.
HOSTRANGED SUPPORT
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[19] 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 necessary to enclose ranged lists within
quotes.
When multiple hosts are specified by the user, a socket will be created for each host and
polled on, effectively allowing communication to all hosts in parallel. This will allow
communication to large numbers of nodes far more quickly than if done in serial. The -F
option can configure the number of nodes that can be communicated with in parallel at the
same time.
By default, standard output from each node specified will be output with the hostname
prepended to each line. Although this output is readable 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.
EXAMPLES
Determine the power status of foo[0-2] with null username and password
ipmipower -h foo[0-2] --stat
Determine the power status of foo[0-2] with non-null username and password
ipmipower -h foo[0-2] -u foo -p bar --stat
Hard reset nodes foo[0-2] with non-null username and password
ipmipower -h foo[0-2] -u foo -p bar --reset
GENERAL TROUBLESHOOTING
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 privilege, 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 ipmi-config(8) tool can be used to check and/or change these
configuration settings.
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 <freeipmi-users@gnu.org> mailing list.
"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 correctly configured on the remote
BMC.
"privilege level insufficient" - An IPMI command requires a higher user privilege than the
one authenticated with. Please try to authenticate 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 specified, 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 retransmission timeout. Some remote BMCs are
considerably slower than others.
"internal IPMI error" - An IPMI error has occurred that FreeIPMI does not know how to
handle. Please e-mail <freeipmi-users@gnu.org> to report the issue.
IPMIPOWER TROUBLESHOOTING
When powering on a powered off machine, the client must have a means by which to resolve
the MAC address of the remote machine's ethernet card. While most modern IPMI solutions
support the ability to ARP and resolve addresses when the machine is powered off, some
older machines do not. This is typically solved in one of two ways:
1) Enable gratuitous ARPs on the remote machine. The remote machine will send out a
gratuitous ARP, which advertises the ethernet IP and MAC address so that other machines on
the network this information their local ARP cache. For large clusters, this method is not
recommended since gratuitous ARPs can flood the network with unnecessary traffic.
2) Permanently store the remote machine's MAC address in the local ARP cache. This is the
more common approach on large clusters.
Other methods are listed in the IPMI specification.
WORKAROUNDS
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 option.
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 <freeipmi-users@gnu.org> or
<freeipmi-devel@gnu.org>.
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.
nochecksumcheck - This workaround flag will tell FreeIPMI to not check the checksums
returned from IPMI command responses. It works around systems that return invalid
checksums due to implementation errors, but the packet is otherwise valid. Users are
cautioned on the use of this option, as it removes validation of packet integrity in a
number of circumstances. However, it is unlikely to be an issue in most situations. Those
hitting this issue may see "connection timeout", "session timeout", or "password
verification timeout" errors. On IPMI 1.5 connections, the "noauthcodecheck" workaround
may also needed too. Issue observed on Supermicro X9SCM-iiF, Supermicro X9DRi-F, and
Supermicro X9DRFR.
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 hitting 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).
noauthcodecheck - This workaround flag will tell FreeIPMI to not check the authentication
codes returned from IPMI 1.5 command responses. It works around systems that return
invalid authentication codes due to hashing or implementation errors. Users are cautioned
on the use of this option, as it removes an authentication check verifying the validity of
a packet. However, in most organizations, this is unlikely to be a security issue. Those
hitting this issue may see "connection timeout", "session timeout", or "password
verification timeout" errors. Issue observed on Xyratex FB-H8-SRAY, Intel Windmill,
Quanta Winterfell, and Wiwynn Windmill.
intel20 - This workaround flag will work around several Intel IPMI 2.0 authentication
issues. The issues covered include padding of usernames, and password truncation if the
authentication algorithm is HMAC-MD5-128. Those hitting this issue may see "username
invalid", "password 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, Quanta QSSC-S4R/Appro GB812X-CN, and Dell C5220. 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.
ipmiping - This workaround option will inform ipmipower to use IPMI based ping packets
instead of RMCP ping packets. Some motherboards have been observed to not implement RMCP
ping/pong support despite being required by the IPMI specification. Issue observed on
Intel Windmill, Quanta Winterfell, and Wiwynn Windmill.
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-type=LAN_2_0. Issue observed on a number of HP and Supermicro
motherboards.
DIAGNOSTICS
Upon successful execution, exit status is 0. On error, exit status is 1.
If multiple hosts are specified for communication, the exit status is 0 if and only if all
targets successfully execute. Otherwise the exit status is 1.
When operating in interactive mode, the exit value will be based on the last power
operation executed.
KNOWN ISSUES
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 generally 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.
IPMI specifications do not require BMCs to perform a power control operation before
returning a completion code to the caller. Therefore, it is possible for ipmipower to
return power status queries opposite of what you are expecting. For example, if a "power
off" operation is performed, a BMC may return a successful completion code to ipmipower
before the "power off" operation is actually performed. Subsequent power status queries
may return "on" for several seconds, until the BMC actually performs the "power off"
operation.
REPORTING BUGS
Report bugs to <freeipmi-users@gnu.org> or <freeipmi-devel@gnu.org>.
COPYRIGHT
Copyright (C) 2007-2015 Lawrence Livermore National Security, LLC.
Copyright (C) 2003-2007 The Regents of the University of California.
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.
SEE ALSO
freeipmi.conf(5), freeipmi(7), ipmi-config(8), ipmi-oem(8)
http://www.gnu.org/software/freeipmi/