Hi @Joseph-TP Yes, my network topology is as you describe, ISP modem—router )))((( RE500X The router is an Archer AX53: Firmware ver 1.5.4 Build 20250926 rel.87654(4555) (up to date) The RE200...

@seoras1 Update: Decided to have one more attempt. Finally got the RE505X to connect to the router and come online, unfortunately only on the 2.4GHz channel. I changed the 5GHz channel from auto to...

Set up the RE505X range extender using WPS as per instructions. This took several attemps and a reset before it appeared to be successful. I then relocated the extende and waited for it to stabalise...