Fujitsu IRMC S2/S3 manual

iRMC S2/S3

23

is an I2C 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 I2C based serial 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.

IPMB. Intelligent Platform Management Bus

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IPMI - technical background

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.