After a reboot, a VMware ESXi 6.7 U3 told me that he has no compatible NICs. Fun fact: Right before the reboot everything was fine.
The ILO also showed no NICs. Unfortunately, I wasn’t onsite to pull the blade server and put it back in. But there is a way to do this “virtually”.
You have to connect to the IP address of the Onboard Administrator via SSH. Then issue the reset server command with the bay of the server you want to reset and an argument.
OA1-C7000> reset server 13 WARNING: Resetting the server trips its E-Fuse. This causes all power to be momentarily removed from the server. This command should only be used when physical access to the server is unavailable, and the server must be removed and reinserted. Any disk operations on direct attached storage devices will be affected. I/O will be interrupted on any direct attached I/O devices. Entering anything other than 'YES' will result in the command not executing. Do you want to continue ? yes Successfully reset the E-Fuse for device bay 13.
The server will power up automatically. Please note, that the OBA is unable to display certain information right after this operation. It will take a couple of minutes until all information, like serial number or device bay name are visible again.