Use one of the following methods to resolve LAN over USB conflicts.
Note:
For conflicts with Open MPI, configure the application so that it does not attempt to use this interface.
• Take down the interface (run
ifdown
under Linux).
• Remove the device driver (run
rmmod
under Linux).
• Disable the LAN over USB interface from the CMM web interface.
Note:
You cannot update the firmware for a compute node while the LAN over USB interface is disabled.
Before updating the firmware, you must re-enable the interface. After updating the firmware, you can
disable the interface again.
To disable the LAN over USB interface from the CMM web interface, complete the following steps.
1. Log in to the CMM web interface.
2. From the CMM web interface homepage click
Chassis Management
➙
Compute Nodes
.
3. Click the compute node ID.
4. Click the
General
tab.
5. Uncheck
Enable Ethernet Over USB
to disable the LAN over USB interface.
Configuring the LAN over USB interface manually
An IMM2 must be configured to use the LAN over USB interface. The firmware update package or Advanced
Settings Utility attempts to perform the setup automatically, if needed. If the automatic setup fails or if you
prefer to set up the LAN over USB manually, use one of the following processes.
For more information about LAN over USB configuration on different operating systems, see
http://www.ibm.com/support/entry/ portal/docdisplay?lndocid=MIGR-5083207.
Installing the LAN over USB Windows device driver
When you install a Windows operating system, there will be an unknown RNDIS device in the Device
Manager. Lenovo provides a Windows INF file that identifies this device. The signed version of the INF file
is included in all of the Windows versions of the IMM2, UEFI, and DSA update packages. Complete the
following steps to install
ibm_rndis_server_os.inf
.
To install the LAN over USB device driver for Windows, complete the following steps.
Note:
You have to perform these steps only if the compute node is running a Windows operating system and
the
ibm_rndis_server_os.inf
file has not been previously installed. The file only has to be installed once. It is
required by Windows operating systems to detect and use the LAN over USB functionality.
Step 1.
Obtain a Windows version of the server or compute node UEFI code package (see “Updating
firmware and device drivers” on page 21 for more information).
Step 2.
Extract the
ibm_rndis_server_os.inf
and
device.cat
files from the firmware update package and
copy them to the
\WINDOWS\inf
subdirectory.
Note:
You can use the -x
path
command-line interface option to extract the files. For more
information about this option, see the readme file that comes with the update package.
Step 3.
(Windows 2003) Install the
ibm_rndis_server_os.inf
file by right-clicking the file and clicking
Install
.
This generates a PNF file of the same name in
\WINDOWS\inf
.
(Windows 2008) Click
Computer Management
➙
Device Manager
and find the RNDIS
device. Click
Properties
➙
Driver
➙
Reinstall driver
. Point the server or compute node to the
\Windows\inf
directory where it can find the
ibm_rndis_server_os.inf
file and install the device.
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