On other routers, I've always had the option to connect separate networks for 2.4 and 5.0 but you cant do that with Eero. Been trying for 3 days to connect a brand new 3755 Deskjet. There must be something about the Apple setup that messes with the eero setup, even if you think you have done a reset on the printer. All is peaceful and happy in our home office now. I then found the deeply hidden static IP assignment on the eero App in Network>Advanced>Reservations and entered the same number followed by Save. :-) Once I found your post, I assigned a static IP on the Brother using the LCD screen menu for wireless (IPv6 off), based on similar network numbers in our WAN. I am not a network expert, but I can look stuff up. I wasn't happy, because I had to carry 20lb or so of bulky laser printer up more than 20 stairs to find it didn't work.

I then plugged it into the Ethernet port of the router in a different room, still no success. I called tech support and they told me it was probably a dual band issue - the printer was switching rapidly between 2.4 and 5GHz because it was so close to the beacon. I have a Brother 3170 CDW Color Laser which was previously on an Apple network and worked flawlessly. I tried a fresh setup (factory reset the printer) and it refused to work wirelessly.

How to connect to wps on mac el capitan