drizuid
commented
3 years ago the mac failures are fine as long as you get an IP on your actual interface (you have OK's in there too) since you're not specifying the interface, it tries them all. errors are expected. all the fragment and _frag stuff you see is because people are playing animal crossing on that server and it's very spammy. An error on the loopback is also fine.
as the guide says, a dns issue is fine, it is the solution.
for testing, i would suggest joining discord, but if you can't try connecting to a server without an animal crossing game running to limit the spam. A game like mario kart8 is the easiest to setup as a test.
Some months ago, I was able to use the client without any issues, but recently the client shows errors like failing to get mac address or a "loopback fail: data (0)"
Then the Switch doesn't show any sign of connection. Doing a test throws the "could not resolve DNS" and ignoring it isn't a solution at all. Also checked the firewall, antivirus and router config to check if these are the issue but maybe I need to check further...