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Chapter 6. LAN over USB

Unlike the BMC and Remote Supervisor Adapter II, the IMM does not require

IPMI device drivers or USB daemons for in-band IMM communication. Instead, a

LAN over USB interface enables in-band communications to the IMM; the IMM

hardware on the system board presents an internal Ethernet NIC from the IMM to

the operating system.

Note: LAN over USB is also called the “USB in-band interface” in the IMM Web

interface.

Typically, the IMM IP address for the LAN over USB interface is set to a static

address of 169.254.95.118 with a subnet mask of 255.255.0.0. In the event of an IP

address collision on the network, the IMM might obtain a different IP address in

the 169.254.xxx.xxx range. The IMM first attempts to use the default static address,

169.254.95.118. If that IP address is already in use, the IMM attempts to randomly

obtain an address until it finds one that is not in use.

Because the IMM might obtain a random IP address for the LAN over USB

interface, the ASU, and DSA use the Service Location Protocol (SLP) to discover

the IMM IP address. These tools perform an SLP multicast discovery on the LAN

over USB interface. When they receive a response from the IMM, they obtain the

attributes that contain the IP address that the IMM is using for the LAN over USB

interface.

Potential conflicts with the LAN over USB interface

In some situations, the IMM LAN over USB interface can conflict with certain

network configurations, applications, or both. For example, Open MPI attempts to

use all of the available network interfaces on a server. Open MPI detects the IMM

LAN over USB interface and attempts to use it to communicate with other systems

in a clustered environment. The LAN over USB interface is an internal interface, so

this interface does not work for external communications with other systems in the

cluster.

Configuring the LAN over USB interface manually

For the IMM to use the LAN over USB interface, you might have to complete other

configuration tasks if the automatic setup fails or if you prefer to set up the LAN

over USB manually. The firmware update package or Advanced Settings Utility

attempts to perform the setup automatically.

Installing device drivers

For the IMM to use the LAN over USB interface, you might have to install

operating-system drivers. If the automatic setup fails or if you prefer to set up the

LAN over USB manually, use one of the following procedures.

Installing the Windows IPMI device driver

The Microsoft IPMI device driver is not installed by default on Microsoft Windows

Server 2003 R2 operating systems. To install the Microsoft IPMI device driver,

complete the following steps:

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Lenovo ThinkServer TD200 Bedienungsanleitung Seite 77