Post originally from 2010, updated 2016.06.20. IPMI seems to be an endless source of “entertainment”…
Original post: http://lokna.no/?p=409
The system event log is overflowing with EventID 1004 from IPMIDRV. “The IPMI device driver attempted to communicate with the IPMI BMC device during normal operation. However the operation failed due to a timeout.”
The frequency may vary from a couple of messages per day upwards to several messages per minute.
The BMC (Baseboard Management Controller) is a component found on most server motherboards. It is a microcontroller responsible for communication between the motherboard and management software. See wikipedia for more information. The BMC is also used for communication between the motherboard and dedicated out of band management boards such as Dell iDRAC. I have seen these error messages on systems from several suppliers, most notably on IBM and Dell blade servers, but most server motherboards have a BMC. As the error message states, you can resolve this error by increasing the timeout, and this is usually sufficient. I have found that the Windows default settings for the timeouts may cause conflicts, especially on blade servers. Thus an increase in the timeout values may be in order as described on technet. Lately though, I have found this error to be a symptom of more serious problems. To understand this, we have to look at what is actually happening. If you have some kind of monitoring agent running on the server, such as SCOM or similar, the error could be triggered by said agent trying to read the current voltage levels on the motherboard. If such operations fail routinely during the day, it is a sign of a conflict. This could be competing monitoring agents querying data to frequently, an issue with the BMC itself, or an issue with the out of band management controller. In my experience, this issue is more frequent on blade servers than rack-based servers. This makes sense, as most blade servers have a local out of band controller that is continuously talking to a chassis management controller to provide a central overview of the chassis.