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3.6. ICMB

45

response. Many IPMI systems do not correctly implement broadcast; it seems to be an oft ignored part of the spec.

3.5.2

OpenIPMI

and

IPMB

The OpenIPMI driver and library handle the details of IPMB for the user. To send a message over IPMB, the user create and OpenIPMI IPMB address as described in section3.14 and sends a normal OpenIPMI message. The library and driver take care of selecting the sequence numbers, formatting the messages, tracking and decoding the response, and resending messages.

3.6

ICMB

TBD - write this.

3.7

SMBus

TBD - write this.

3.8

Session Support

TBD - write this.

3.9

LAN

The IPMI LAN interface allows users to connect to IPMI systems over an Ethernet interface. This can generally even be done when the system is turned off, although it probably has to be plugged in. This lets you do things like power control the system and reset the main processor even when the operating system is not operational on the system.

The IPMI LAN protocol runs over a subset of the Remote Management Control Protocol (RMCP) protocol. RMCP is defined in RMCP[1].

The IPMI LAN is not well defined in the spec. Many valid interpretations of the spec were possible. Some errata has been issued, but that really only added one more possible interpretation. OpenIPMI implements the three different common interpretations of the spec. They can interwork seamlessly, so it is not a problem.

TBD - describe the protocol in detail.

3.9.1

LAN

Configuration

Most systems have tools to configure the IPMI LAN interface. IPMI has a built-in way to do this, too, through a set of tables.

LAN Configuration Commands To set up the LAN configuration table, the command shown in table 3.14 is used to set parameters.

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