I have a RE200 connected to my Netgear Nighthawk R7000.
The main use for my RE200 is to connect a Synology NAS to it using a cable. I have no need for extending my wifi range but I use it as a sort of dongle since the Synology doesn't support usb wifi properly.
This has worked in the past! However, I was gone on a trip and left the power off for a long time. Now it doesn't work anymore.
I ended up resetting the RE200 and tried setting it up again.
I keep getting two different networks. So if I connect to the RE200 access point I can reach the NAS, but if I connect to the Netgear I can't.
The RE200 also isn't visible in my connected clients/attached devices view on the Netgear.
I tried everything.
Connecting with WPS
Connecting without WPS
Using different subnets on the router vs re200 (192.168.0.* and 192.168.1.* and reversed)
Setting it to extender mode or standalone
Setting it up with the iOS app or the web interface
Same name networks vs different
And probaby more stuff I don't remember.