Exact same issue I am having but with Xbox One.  Worked fine prior to update last week. Nothing I do solves the problem.  Going to ask a similar question on the board. 

Also same problem.

My Nintendo Switch connects and can do some online things.  (i.e Purchase a game) but can't update or download things.  some in game functionality doesn't work either.

like dandesilest  said, it seems to connect okay, but a connection test on the Switch always fails.

I am also having the same problem with my wife's e-reader.  She can purchase a new book through it, but cannot download it.  All other devices in the house seem to work fine.

If I create a hotspot from my iPhone and connect these devices they work just fine (like they did with my old router last month).

Indianajns  dandesilest   Did either of you find a solution?  

Ugh. Sorry you are having problems. My issue was resolved with the Nov 17th update. Check your update history to se if you have the most up to date system. Cheers. 

I have the update and issue remains as well...

Indianajns would you mind doing dandesilest  and I a favor and tell us about your eero config.  If we are having the exact same problem, then maybe we are just a config setting away from having it resolved. 
Are you doing any reservations or port forwarding for your switch?  Is UPNP enabled or disabled?  Did you override the default DNS?

Hey, I am having the same issue (Switch connecting like all is fine, but no or partial downloads and updates, and eShop working from time to time). Obviously, all of the Internet's wisdom in troubleshooting this kindly failed.

I spent an hour on the phone with eero CS, to conclude that all was fine on the eero's side. I then spent an hour on the phone with Nintendo, to conclude that all was fine with the console, since it works just fine with my old router. 

I am a bit in a dead end here and it is driving me nuts. Anyone has a hint on where the issue could be?

Update: I spent a long time on the phone multiple times with support, I have reached the point where I just want to return it for reimbursement, but I am stuck, waiting for the return process to kick off with an email from the corresponding department, which is apparently very busy following black Friday. I hope this thread will help speeding things up for all of us, as we are at least a few with the same issue. Hang on in there!

Do you all have use the Secure + service?  I had to disable the features for my son's switch to work.

I have had the same DNS error issue with my son’s new switch. Found the following YouTube video and followed DNS directions and it worked! https://youtu.be/8g24hfadWn4

Yes, I tried multiple DNS services on the Switch and at the Router level.  None successful.
Eero support also had me try a few changes around DNS that didn't work as well.

I have this exact same problem. I’m outside the return window to return my eero and I really don’t want to because it works great for everything else. But I’m having to run my switch on my phone hotspot which is frustrating. 

Also me. Hey, Eero! Wtf!

I have a second random issue besides the switch: the Amazon prime video roku channel now no longer works. 
 

has anyone tried setting the eero to bridge network mode? I read that solution somewhere but when I tried it suddenly none of my mesh nodes would talk to each other. 

Just hung up with eero for a second time today. This is seriously unacceptable; (very) long story short, they refuse to either refund or replace the unit because I am past the 30 days period (when the defect appeared after 2 months, following an update) and tell me that I have to deal with Amazon for a refund, since I bought from them. I did try the Amazon customer support, and they refused to proceed as well.

Fun Fact: eero is an Amazon company. Good team work, guys.

I am done spending energy on this issue, I am frustrated and very disappointed. I will give the reviews they deserve, every occasion I will have.

Good luck, guys.