Proper router settings for TPLink AX1800 hooked to Pace Gateway with Fixed Wireless

I'm sorry, I've just become aware (or maybe I knew it and just forgot) that fixed wireless doesn't support DMZ plus mode.  Given that, maybe the best course of action is to put the TP-Link into Access Point mode. 

I'd suggest doing a factory reset on the AT&T gateway (hold down the reset button for >15 secs) and the TP-Link as well.  That way you put everything back to stock and start from a clean sheet of paper.

Paraquat wrote in another post (now closed):

Should I return new router for new AP, since new router can only be used in AP mode?

Any help I could get would be great! Thanks!

Are you running the TP-Link in Router or Access Point mode?

If the former do you have the Pace set up in DMZplus mode?  The two devices definitely need to be on different subnets (if the Pace is 192.168.1.254 then the TP-Link needs to be on something other than192.168.1.nnn).

What, specifically, is not working very well?

hello! Thanks for the info! Very slow and loses and the comes back. It just seems like I have a lot of traffic on the log sheets (I'll Post) & I'm just thinking I have something wrong. I do have both on the 192.168....I'll fix.

You didn't really answer my first two questions. 

Those log entries are from two devices, perhaps phones because the MAC addresses don't appear in any database so they may be randomized addresses like many phones do these days.

I'd also suggest disabling IPv6 for the time being.  You can see where that is in your first screen cap.

Oh, my bad! Router mode on the TP. I'm using fixed wireless & I don't find anything to do with the "DMZ" on the pace. I have the pace set to 172.16.XXX.XXX and the TP on the 192.168.XXX.XXX that was default. What should I do about the DMZ? Thanks!

I gave you the link to the article about setting up DMZ Plus mode in my first comment.  It's all the way at the bottom of the page.

Thanks! I tried it and I don't have the options available to me on my gateway. I have a 5268 pace. What can I do? Thanks!

Thanks!