Wrong setup for a home network?
I originally did this because I wanted to play around with using a different router settings and with PiHoles and Xfinity DNS is https://citeref.com/easybib/ locked down.
I also hoped that this would give better signal - the two routers using beacons at the opposite ends for each band, etc. https://easytax.onl/irs/
I have the second wifi router connected to the one of the router ports with a dedicated IP. I have two PiHoles on dedicated IPs, one of the Xfinity and one on the second router.
The second router is just an Archer C8, which was on clearance, and I mainly picked it up because it had a built in USB port and I could get to my music from the Roku.