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Intel Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver, MPCHC5525 - page 17

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Intel® NetStructure™ MPCHC5525 System Master Processor Board IPMI Reference Driver User’s Guide 17

IBMU Functionality

The connection via ICMB is useful for maintenance purposes. If, for example, the CPU board in

one chassis hangs, the BMC in the other chassis can read the lo g file of the affected BMC via

ICMB.

Another application is the monitoring and controll ing of nonintelligent devices. If the CPU board

the BMC is located on hangs or is in stand-by mode , th e BMC in anothe r chas sis ca n request sens or

data of the nonintelligent device via ICMB and the command “Master Write-Read I2C”.

The following section provides a simple communication example. The example supposes that a

nonintelligent fan module located in chassis 1 and connected via IPMB1 to the BMC in chassis 1

(BMC1) is monitored and managed by the BMC in chassis 2 (BMC2).

The communication procedure is as follows:

Figure 9. Intelligent Chassis Management Bus (ICMB)

Figure 10. Fan without IPMI Controller Monitore d vi a ICM B

Contents

Main Page Contents Figures Tables Page Page Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 7 Using This Guid e Using This Guide 1 1.1 Terms and Definitions Table 1. Terms and Definitions 8Intel Using This Guide 1.2 Other Sources of Information Table 2. Reference Documents Table 1. Terms and Definitions IBMU Functionality 2 2.1 Introduction 2.1.1 Purpose of IPMI 2.1.3 Where Is IPMI-Relevant Information Stored? 2.1.4 Basic Communication Principles 2.1.5 Requirements Page 2.1.6 Available D rivers 2.2 How Does Communication Work? 2.2.1 Communication Within a Chassis 2.2.1.1 Devices with IPMI Controller 2.2.1.2 Nonintelligent Devices 2.2.1.3 On-Board Temperature Sensor 2.2.2 Communication between Chassis Page Page Preparing Software for IPMI Usage 3 3.1 Action Plan 3.2 Notes on Writing Your Own IPMI Driver 3.3 Sensor Data Records 3.3.1 Obtaining SDR Settings 3.4 Notes on Writing System Managem ent Software With your management sof tw a re and For c e -sp e cif ic O E M IP MI co mm ands, you: 3.4.2 Checking CP U Boar d Si gn als 3.4.2.4 POST Code 3.4.3 Monitoring the IBMU 3.4.3.1 Self Test 3.4.3.2 IPMI Controller Watchdog Supported IPMI Commands and BMC/PM Addresses 4 4.1 Standard IPMI Commands 4.2 Global IPM I Co m mands 4.2.1 System Interface Commands 4.2.3 SEL Commands 4.2.4 SDR Commands 4.2.5 FRU Inventory Device Commands Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 25 4.2.6 Sensor Device Commands All commands can be used in every operation mode. 4.2.7 ICMB Bridge Commands Table 7. Implemented Optional Sensor Device Commands Table 8. Implemented Optional ICMB Bridge Commands (Sheet 1 of 2) 4.3 Force-Specific Commands 4.3.1 BMC/PMChangeRole 4.3.1.2 Response Data 4.3.1.1 Request Data 4.3.2 FlashFileSystemClear 4.3.2.1 Request Data 4.3.2.2 Response Data 4.3.3 GetGeographicalAddress 4.3.3.1 Request Data 4.3.3.2 Response Data 4.4 BMC and PM Addresses Intel NetStructure MPCHC5525 System Master Processor Board IPMI Reference Driver Users Guide 29 Page Customer Support 5