Hocus Pocus

Before installing ESXi, run the Cisco HUU to upgrade the server’s firmware (BIOS, CIMC, adapter firmware). The ESXi custom ISO expects specific firmware levels. Mismatched firmware = degraded performance.

"That’s the one," Raj said. "That ISO is pre-loaded with all the Cisco drivers. It has the VIC firmware hooks, the RAID controller drivers—everything the standard ISO leaves out. It’s the difference between a fight and a handshake."