@RAThomas said in UEFI is not booting with Windows DHCP:

The solution for my case was to add this to the client port configuration on my Cisco switch:

Yep, if you are not using port-fast, fast-ftp, mstp, or rstp (or whatever your switch mfg calls it) standard spanning tree takes 27 seconds to start forwarding packets. This timer restarts every time the network link winks, like as the PC starts, iPXE starts up, and then FOS linux starts. FOS linux boots so fast (< 16 seconds), its already given up trying to get an IP address before the ports starts to forward traffic.