Lan Over Usb - IBM System x3100 M4 Type 2582 Problem Determination And Service Manual

LAN over USB

A LAN over USB interface enables in-band communications to the IMM2; the IMM2
hardware on the system board presents an internal Ethernet NIC from the IMM2 to
the operating system.
Typically, the IMM2 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 IMM2 might obtain a different IP address in
the 169.254.xxx.xxx range.
Because the IMM2 might obtain a random IP address for the LAN over USB
interface, the ASU and firmware flash utilities, DSA, and the IBM Systems Director
Agent use the Service Location Protocol (SLP) to discover the IMM2 IP address.
These tools perform an SLP multicast discovery on the LAN over USB interface.
When they receive a response from the IMM2, they obtain the attributes that
contain the IP address that the IMM2 is using for the LAN over USB interface.
Potential conflicts with the LAN over USB interface
In some situations, the IMM2 LAN over USB interface can conflict with certain
network configurations, applications, or both. For example, Open MPI attempts to
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IBM System x3100 M4 Type 2582: Problem Determination and Service Guide
Note: After you reset the IMM2, this confirmation message is displayed
immediately:
IMM2 reset command has been sent successfully!! Press ENTER to continue.
The IMM2 reset process is not yet complete. You must wait approximately 3
minutes for the IMM2 to reset before the IMM2 is functional again. If you
attempt to access sever firmware information while the server is resetting,
Unknown is displayed in the fields, and the description is Error retrieving
information from IMM2.