turns out my edgerouter x is filling the NAT table on my 5268ac with DNS requests and causing the piece of shit to crash. not sure why it would do it randomly all of the sudden and persist but cutting it out of the loop fixed the internet
@sky I have a hunch ER-Xes are just designed to fail. We used to use them for onsite networks but they all failed almost precisely after a year. Something about using a Flash Drive as the FS drive. It doesn't surprise me that it'll NAT flood.