I have a 2018 MBP that's connected to an Ethernet cable 99% of the time. This is my work machine, and I'm on it all the time. However, whenever I disconnect my MBP from Ethernet, and allow it to connect to WiFi, my entire home WiFi network will periodically disconnect.
Approximately every 15 minutes (it's actually almost exactly on the 15 minute mark), my home WiFi will lose its Internet connection. Looking at my WiFi diagnostics, it complains about DNS connectivity being an issue. I can restore the WiFi router's Internet connectivity by changing the DNS server in the router, but then 15 minutes later, it's down again.
Is there some kind of DNS server that could be running on my MBP interfering with my local network DNS? How would I even go about checking for that? Could there be some other kind of phenomenon going on?!
Edit: I'm using an AmpliFi Router HD mesh WiFi router with 1 base and 2 extenders. Firmware version 3.3.0.
I resolve this every 15 minutes by cycling back and forth between
18.104.22.168 as the DNS servers on my router.
Here's a screenshot of the error that I'm seeing from the router:
Also, here's my
arp -a output, in case it helps
? (169.254.80.182) at f0:9f:c2:36:50:b6 on en0 [Ethernet] ? (169.254.85.113) at f0:9f:c2:36:55:71 on en0 [Ethernet] amplifi.lan (192.168.134.1) at f2:9f:c2:36:1e:49 on en0 ifscope [ethernet] philips-hue.lan (192.168.134.2) at 0:17:88:4f:4f:43 on en0 ifscope [ethernet] home-mac.lan (192.168.134.5) at 78:7b:8a:c0:19:40 on en0 ifscope [ethernet] wills-iphone.lan (192.168.134.218) at 40:4d:7f:95:e7:cf on en0 ifscope [ethernet] ? (22.214.171.124) at 1:0:5e:0:0:fb on en0 ifscope permanent [ethernet] ? (126.96.36.199) at 1:0:5e:66:e6:e6 on en0 ifscope permanent [ethernet] ? (188.8.131.52) at 1:0:5e:7f:ff:fa on en0 ifscope permanent [ethernet]