I have ESXi 5.5.0 and i got a driver to my Realtek 8168 Gigabit Ethernet that runs with this versión of ESXi.
i tried to install ESXi Update 2 with same driver and i couldn't. No problem, i dont need new features like new Windows versión support.
But now i need new Windows support that ESXi 6.0 gives us. Then i need to install it.
When i use last versión of ESXi-Customizer (v.2.7.2) it gives me an error that say me my driver file is an old versión.
Then i use CD burned with that driver file and install program say i have no Ethernet device... then i cannot continue install process.
summarizing: I have no idea where to find a more actual device driver to my Realtek 8168. Or what to do. Any idea?