Platform Management

Intel® Server Board SE7520JR2

5.3.16mBMC Self Test

The mBMC performs various tests as part of its initialization. If a failure is determined (e.g., corrupt mBMC FRU, SDR, or SEL), the mBMC stores the error internally.

5.3.17Messaging Interfaces

This section describes the supported mBMC communication interfaces:

•Host SMS Interface via SMBus interface

•LAN interface using the LOM SMBus

These specifications are defined in the following subsections.

5.3.17.1Channel Management

The mBMC supports two channels:

•System interface

•802.3 LAN

Table 52: Suported Channel Assignments

Channel ID

Media Type

Interface

Supports Sessions

1

802.3 LAN

IPMB 1.0

Multi-sessions

 

 

 

 

2

System Interface

IPMI-SMBus

Session-less

 

 

 

 

5.3.17.2User Model

The mBMC supports one anonymous user (null user name) with a settable password. The IPMI Set User Password command is supported.

5.3.17.3Request/Response Protocol

All of the protocols used in the above mentioned interfaces are Request/Response protocols. A Request Message is issued to an intelligent device, to which the device responds with a Response Message.

As an example, with respect to the IPMB interface, both Request Messages and Response Messages are transmitted on the bus using SMBus Master Write transfers. In other words, a Request Message is issued from an intelligent device acting as an SMBus master, and is received by an intelligent device as an SMBus slave. The corresponding Response Message is issued from the responding intelligent device as an SMBus master, and is received by the request originator as an SMBus slave.

5.3.17.4Host to mBMC Communication Interface

The host communicates with the mBMC via the System Management Bus (SMBus). The interface consists of three signals:

•SMBus clock signal (SCLH)

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Revision 1.0

 

C78844-002