@sebastian-roth I had some spare time this morning and decided to bypass all of my infrastructure to see if my infrastructure and/or other issues similar to spanning tree were causing the problem.
I setup an old NUC with Ubuntu 14.04 SVR and installed FOG. I took an old DD-WRT router and setup it up to work with the FOG server along with a $20 Switch.
Once everything was setup, I attempted to capture images for the three HP 4300 SFF computers along with the 2 NUC computers and I had “Zero” issues.
There aren’t any compatibility issues with the NIC’s and the FOG server. Just wanted to let you know that bringing everything down to a very simple setup eliminated all of the issues we were having setting up FOG on a VM, inside its own vlan, etc…
This setup works for us and wanted to update you as I think this is a good project and solution.
Thanks again for all of your help.