@acuponctus If you're targeting whole home mesh system you have a couple of good choices: 1. Check the Deco X50-5G for Deco mesh. 2. Check this comparison for Easymesh.

@Smithy7000 You can change only the Internet port negotioation speed (which in your case is not necessary) - check this thread. Try using another quality made ethernet cables CAT 5E or above and use...

@fikser You have to reset RE190 to its factory defaults by pressing teh reset button for about 10 seconds: Then reconfigure the RE190 from scratch to connect it to your new router.

@AlanC19hhg WR902AC-to-Intenet Router wireless link is possible in a Range Extender Mode but your inquiry was for an ethernet cable connection - that's AP mode.

@AlanC19hhg You could configure the WR902AC in AP mode and use its USB Sever in your LAN. Disable its wireless radio if it's not needed.

@JoanBz In your case you can use the Tether app to configure your MR600 - its' compatible with the Tether app (details).