BTW - in addition to my solution, I have left the configuration of the DHCP server on the AX50 with a smaller IP address pool per my earlier attempts. Not sure if that makes any difference.

It took me days to get this to work, so hope it helps others. I have an AX50 which I wanted to extend with my new RE700X. Initial set up went fine and when relocated all the lights where blue (i.e....