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Along the way my ISP's router #DNS cache and #DHCP server helped to frustrate me at every turn 
it's why I tacked on the side-project of installing #PiHole, though not quite ready to cut over to that as DHCP server yet.
At the very least my three main network machines now have easy to remember static IPs so when all else fails I don't have to open the awful router web interface to find my stuff.
Overall though I'd call this experience a success. No data was lost and I learned a lot 
Well it took a whole long weekend of troubleshooting and rebuilding, but once again my #homelab is running smoothly. There were a few factors that combined to degrade things to a point where I just needed to examine my whole network and what was running on my machines.
The root turned out to be a network bridge configured with #systemd-networkd not playing nicely with docker being installed to run a big compilation job.
Once #docker screwed with the network config things spiralled from there.
