Fujitsu Remote Management User Manual page 23

IPMI, IPMB and ICMB
The IPMI initiative resulted in three central standards:
– IPMI. Intelligent Platform Management Interface Specification
describes the higher-level architecture, the current commands, event
formats, data packets and properties that are used in IPMI-based systems.
– IPMB. Intelligent Platform Management Bus
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is an I C based (write only) bus, which provides a standardized connection
between various modules in a common housing.
IPMB can also be used as a standardized interface for remote management
modules.
– ICMB. Intelligent Chassis Management Bus
(Not currently implemented in the ServerView remote management
environment.)
provides a standardized interface for exchange of platform management
information and for control across systems. ICMB is designed in such a way
that it can be implemented with a device that is connected to the IPMB.
IPMI implementation
The core element of an IPMI implementation is the Baseboard Management
Controller (BMC).
The BMC performs the following tasks:
– The BMC organizes the interface between the system management
software and the platform management hardware.
– It provides autonomous functions for monitoring, event logging and recovery
control.
– The BMC acts as a gateway between the system management software and
IPMB.
IPMI allows platform management to be extended: Additional management
controllers can be connected via the IPMB. The IPMB is an I
bus, which runs between the main modules of the system. It is used for
communication with and between the management controllers.
With the support of multiple management controllers, IPMI provides a scalable
architecture: A complex server system can use multiple controllers for
monitoring different subsystems, e.g. power supplies, hot swap RAID drive
modules etc.
iRMC S2/S3
IPMI - technical background
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C based serial
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