ASUS - ZenTalk

You just described what I did a number of times. As you wrote, I hoped. It did not work. Thanks for suggestion.

HelloI have a RT-BE92U router with RT-AX59U and RT-AC68U as mesh nodes. The 59U node connects fine cabled, but the 68U won't connect with cable. So I have to use wifi 5GHz for 68U. Happily wifi connection is great (49dBm). But I have found no way to ...

The router has 2.5 Gb  ports;  the router has an internal switch. There should be no performance gain using another switch.