Resolving Unknown Data Sources in Dell OpenManage Essentials


Have you ever looked in OpenManage Essentials and seen the above when looking at a device? I recently had this experience when checking on a number of older servers that we were not receiving alerts properly for.

Checking on the iDRAC and server it appeared that the management agents were running and correctly configured so that the OME server could contact the device, but attempts to discover and inventory were still failing. What was going on?

The Dell Troubleshooting Tool is an excellent  utility by Dell to interrogate devices using variety of protocols. Querying the iDRAC using WSMAN soon found the problem:


Many of thew older servers had internal SSL certificates installed on them, which had subsequently expired. As most of the servers had been decommissioned, renewing the certificates had been overlooked.

Getting rid of the expired certificate is not as straight forward as it should be, with no ability in the iDRAC6 web interface to delete the certificate. This was resolved by accessing the IDRAC via SSH and using the racadm command:

racadm sslresetcfg

After the iDRAC interface rebooted to apply changes, OME was then able to discover and inventory the iDRAC interface.

The Dell troubleshooting tool proved to be a very useful tool in the infrastructure admin’s toolbox for dealing with non-obvious management protocol issues.