Kontron AM4901 IPMI - Manual (Page 27)

AM5901/AM4901 IPMI Firmware User Guide
ID: 1035-8760, Rev. 3.0 Page 27
Another way to system configuration is to use standard and OEM IPMI commands. All of the
MCH's CLI commands for configuration have their correspondent OEM IPMI commands.
Therefore instead of using the CLI commands there may be used IPMI commands to adminis-
trate the system. There are the following interfaces which might be used for sending IPMI com-
mands to the MCH:
• The MCH's Ethernet management port
• A standard IPMI interface (KCS interface) on a processor AMC's payload
The configuration of the MCH for a certain rack type as a rule is done automatically when acti-
vating the MCH in the rack for the first time. If additional modifications are required after that,
they can be performed using CLI commands. All configuration modifications may also be done
by issuing OEM IPMI commands using a tool for system management support. Usually the
open Linux tool "ipmitool" is used as a small management tool to send standard or OEM IPMI
commands directly to the MCH. For complex management tasks such as automatic pow-
er-down or reading out of the System Event Log, "ipmitool" offers specific commands which
combine several standard IPMI commands.
When a µTCA system once is running it is even possible to administrate it by sending IPMI
commands from a hosted processor AMC module to the MCH via the IPMB-L bus on the back-
plane. For this the used communications path would then be bi-directional as follows:
Management program in AMC module (e.g. “ipmitool”)
|
IPMI driver on the payload of the AMC module
|
KCS interface of the AMC module
|
MMC of the AMC module
|
IPMB-L on the backplane
|
MCMC of the MCH
|
Carrier manager of the MCH
The operating system Linux® can be so configured that the IPMI driver starts automatically and
that “ipmitool” can be directly called. It must also be considered that the management program
is only available as long as the AMC module on whose payload it is running is activated by the
MCH. It is possible to force permanent operation of the AMC module (leaving out the MCH) by
issuing the CLI command “pwr” or the OEM IPMI command “SetPermPwrParameter” for the
corresponding system slot for which the payload power is to remain on permanently.