@pcayphas said in RTL 8111B - Not Booting PXE:
Only PCs with RLT 8111B are refusing to connect to the fog server.
To take this a bit further and be really able to help you we need a more precise description or best photo/video of what you are running into. There are about ten to 15 different cases I know from the top of my head that would match your description. We need to be clear on what error/hang/issue you see!!
Maybe there is something in this discussion that might help: http://www.edugeek.net/forums/o-s-deployment/39383-pxe-boot-realtek-8111b-c.html