I use following 2 switches. I get same problem in both. but when same switches are used with in network fog server there is no problem. it only happens with one particular desktop and in isolated setup only.
https://www.linksys.com/us/p/P-LGS108P/
https://www.amazon.com/KEEBOX-SGE05-1000Mbps-Gigabit-Ethernet/dp/B004FM58MO/ref=sr_1_fkmrnull_2?crid=3C2KC43XR3UPQ&keywords=keebox+switch&qid=1556297026&s=gateway&sprefix=keebox+%2Caps%2C192&sr=8-2-fkmrnull
@ckasdf @george1421 guys I must also share with you that getting the expensive dongle wasn’t the end of the line for me :) In a mixed environment (as was my case) meaning one has legacy PXE laptops and the newer iPXE machines the tftp server needs to know which image file name to serve back the the client based on a bare metal architecture ID, and that must occur at the DHCP level, which of course only Windows 2016 supports lol
So doing the USB stick automatically solves that problem :) since the human knows which is which (architecture wise that is) and would pick the correct stick to boot from
