@JSchnee21 Sorry 'bout that. It's CAT5e. And, we've just located the problem. When I changed the IP of the root AP, all was well. Didn't know why. Turns out that there was another tech quite a while...

@Byteguy It's now 6:30 am and no problems since yesterday morning. Keeping fingers crossed. I believe I will ask the TP-Link tech people if they have any idea why the AP wouild suddenly refuse client...

@Byteguy Just had a thought. Although the AP says it's disconnected, since it is the root AP, it has to be working otherwise no one could get on the internet. What I think is going on is the 2.4GHz...

@JSchnee21 I'll answer the questions by inserting comments in your answer: How do you have 6 AP's? I though that root nodes only supported 4 MESH connected downlinks (for a total of 5 AP's). Or maybe...

@Byteguy I should also mention that I was surprised that the network was still working since it is the root AP (wired to the client CPE). All communication goes throuigh this AP. When it is reported...

The network has been working quite well thanks to several of you out there. For that I am extremely grateful. Mesh network consists of two CPEs and 6 APs. For some reason, the root has been...