Extending a network
I have a Netgear (R6700) - AC1750 Nighthawk router as my primary WiFi router and I am attempting to set up an Airport Extreme router as a network extension. The two are connected via ethernet cable, as they are about 200' apart, in separate buildings.
In Airport Utility, the AP Extreme is found and configured to "Join" the existing network. All works good when doing this in the house where the Netgear router is (and I suspect the two devices are communicating wirelessly even though I have them connected via ethernet cable) but when I move the AP Extreme to the new location 200' away it is out of wireless range. Even though I connected the two by 200' cable, it's not working.
I then tried to "Extend" the existing network in Airport Utility. Again, doing this in the house much closer to the Netgear router and connecting the two via cable. Airport Utility then flashes the amber light and also displays a Red dot with a number 1 in it. I'm not sure what the Red number 1 indicates... I've never seen this before.
A while ago, I have successfully set up two older AP Express routers to "Join" the network and they work fine. They are both connected wirelessly and within range of the Netgear router. I'm perplexed. I welcome some insight from knowledgeable experience. Thank you in advance.
iPhone 6s, iOS 13