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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 1. LAN over USB addresses
IMM2 IP addressIMM2 IP subnet maskHost addressHost subnetHost subnet maskKeyboard Controller Style (KCS) address
169.254.95.118255.255.255.0169.254.95.120169.254.95.0/24255.255.255.00x0CC0
  • 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.
  • 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.