Accessing The Imm2 Using The Lan Over Usb; Interface; Potential Conflicts With The Lan Over Usb; Resolving Conflicts With The Imm2 Lan Over Usb Interface - Lenovo Flex System x440 Compute Node Installation And Service Manual

Table 2. IMM2 actions (continued)
Tab Selection
IMM Configuration
Restart IMM
Reset IMM to
factory defaults...
Activation Key
Management
Accessing the IMM2 using the LAN over USB interface
Unlike a baseboard management controller, the IMM2 does not require IPMI device drivers or USB daemons
for in-band IMM2 communication. Instead, a LAN over USB interface enables in-band communication to the
IMM2; the IMM2 hardware on the system board presents an internal Ethernet interface from the IMM2 to the
operating system. LAN over USB is also called the USB in-band interface in the IMM2 web interface.
The following table shows the IP addresses for the IMM2 and the host.
Table 3. LAN over USB addresses
IMM2 IP subnet
IMM2 IP address mask
169.254.95.118 255.255.255.0
Potential conflicts with the LAN over USB interface
In some situations, the LAN over USB interface can conflict with certain network configurations, applications,
or both. For example, Open MPI attempts to use all the available network interfaces on a server or compute
node. Open MPI detects the IMM2 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 communication with other systems in the cluster.

Resolving conflicts with the IMM2 LAN over USB interface

Use any of the following actions to resolve LAN over USB conflicts with network configurations and
applications.
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.
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Description
The IMM Configuration page displays a summary of the current IMM2
configuration settings. It also provides the following functions:
• Backup the current IMM2 configuration
• Restore a saved IMM2 configuration
• Display backup and restoration status
• Reset the configuration of the IMM2 to the factory defaults.
• Access the IMM2 initial setup wizard
Note: Backups that you make from the IMM user interface will not contain
any local user accounts that were created from the IMM user interface.
The Restart IMM page allows you to reset the IMM.
The Reset IMM to factory defaults... page allows you to reset the
configuration of the IMM2 to the factory defaults.
Attention: When you click Reset IMM to factory defaults..., all of the
modifications that you made to the IMM2 are lost.
The Activation Key Management page allows you to manage activation keys
for optional IMM2 or compute node Features on Demand (FoD) features.
Host address Host subnet
169.254.95.120 169.254.95.0/24
Keyboard
Controller
Host subnet Style (KCS)
mask address
255.255.255.0 0x8C80