I'm scratching my head a bit here - updated my old unifi router to a new one, migrated all my setting over and everything was fine for a few days. I plugged in a new Rpi I was tinkering with and my whole network shut down (few APs, switch, etc) - still connected, but all my devices went offline. Unplugged the Rpi - thought that was the issue, but poking around and uplugging/plugging devices it seems my Unraid server is the issue (at least now).
I have not changed anything on the server at all - been running flawlessly for a few years - dhcp assigned IP address - nothing static, real basic stuff. But if I plug it in to the network it literally shuts down everything, my client count goes to 0 devices....my unifi router (UDMP) is still reachable by external address - but locally it's gone and so is everything else. If if punch in static IP info I never get the address I save, I get an address on my subnet - but not the one I designate. If I select automatic/DHCP I tend to get a self assigned IP (wacky high IP address) - if I add a fixed IP in the unifi router I get mixed results. Weirdest part is when I get the IP address on my subnet - I get an almost correct MAC address - sometimes I'll get the IP address I specify with the proper MAC address, but it disappears in a few minutes - other times I get 2 address from one LAN port. So strange.
Here are a few things I've checked/done:
-No ISP router or anything before my UDMP
-Kept same network range as before (basic 192.168.1.x)
-Made sure no new/strange unifi/firewall settings were set up...I deleted my migrated site and started fresh install of the network setup
-new cable (just in case it went bad) and different ethernet ports (I have 4 on my server)
-pulled USB flash drive from server, deleted the network config file and had Unraid rebuild it to set to defaults
-started in safe mode (both w/GUI and without) - with GUI I can see the self assigned IP address
-can't ping any of the addresses that come up when I get one for the server
I've been elevated to a level II support for unifi - but wanted to cover my bases....90% sure they'll tell me it's something on UNRAID side of things which kind of makes sense....but also doesn't really make sense (to me at least). Again, this all works fantastic for a few years - but all the sudden it started doing this funky stuff!