IBM BladeCenter HS22V User Manual (English)

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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.

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.

Resolving conflicts with the IMM LAN over USB interface

Use this information to resolve LAN over USB conflicts with network

configurations and applications.

There are several actions that resolve LAN over USB conflicts with network

configurations and applications:

1. For conflicts with Open MPI, configure the application so it does not attempt to

use this interface.

2. Take the interface down (run ifdown under Linux).

3. Remove the driver (run rmmod under Linux).

4. Disable the USB in-band interface on the IMM through either the IMM Web

interface or the AMM Web interface.

Important: If you disable the USB in-band interface, you cannot perform an

in-band update of the IMM firmware using the Linux or Windows flash

utilities. If the USB in-band interface is disabled, use the Firmware Update

option on the IMM Web interface to update the firmware.

If you disable the USB in-band interface, also disable the watchdog timeouts to

prevent the server from restarting unexpectedly.

Chapter 4. Configuring the blade server 65

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General

Form Factor	Blade
Processor	Intel Xeon 5500 or 5600 series
Maximum Processors	2
Maximum Memory	192 GB
Hard Drives	Up to 2
Storage Controller	Integrated RAID
Network Interface	Dual-port Gigabit Ethernet
Power Supply	BladeCenter shared power
Blade Width	Standard blade width
Operating System Support	Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESX
Memory Slots	18 DDR3 DIMM slots