I have the same issue I have been trying to figure out all day with no luck. I just built a new rig to consolidate my unraid server and my desktop pc into one. I am able to get booted into my server (GUI) no issues except I cannot get an IP address. If I leave it set to automatic I get a 169.x.x.x address and setting a static IP does not help. I have an onboard NIC, no pcie NIC laying around. My current server that I am running is 6.3.1. Any other suggestions would be great!