how about change different SSID of the 750 and router, then re-configure it to make sure whether connect one AC750 to the other.

when connect 750#2, have you obtain a correct IP? could you log in the web of RE and router? Do you have a correct gateway?

Thanks very much for your replies, @uutommi.

I actually finally called TPLink support yesterday and got the second RE200 connected successfully with internet access working.

However, I have a recurring issue that is keeping me from using the second RE200.

Each time I set up the second RE200, after some time (and I am not sure how much time, but it seems like it's an hour or more at least) the second RE200 loses internet access. The Wi-Fi signal from the second RE200 is still very strong, but it cannot provide any connection to the internet.

My router and the first RE200 always work fine and never lose internet connection.

This happens repeatedly. All three lights on the unit are on and green in all cases. For example:


I would really appreciate any advice on troubleshooting and resolving this issue - I am starting to wonder if I have a bad unit and need to return it for a replacement. The first RE200 I installed works very well, best extender I've ever used, and I would really like to have the second RE200 to work in the same way.
Thanks,

Dana

OK, more testing and more feedback from today.

Action: Set up second RE200 with a different SSID.

Steps:

- Unplug first RE200
- Set up second RE200 w/different SSID (e.g., with "_ext" added on)
- Tested second RE200 at two locations - internet access working
- Plugged in first RE200
- Waited until both units have valid IP address in router (e.g., 192.168.1.26 and 192.168.1.28)
- Tested internet access at first RE200 - works
- Tested internet access at second RE200 - fails

At this point I feel one of the statements below must be fact:

1. You cannot have two RE200 extenders attached the same router and maintain internet access on both extenders
2. My second RE200 is defective and needs to be returned/exchanged so I can try it again with a different RE200

I would really appreciate any advice to help me troubleshoot this issue - I'm really getting frustrated by this. Thank you.

Talking to myself here...

I think that I finally (maybe) have both of my RE200/AC750 extenders up and running.


I had to:


1. Reset my router (again)
2. Set up the first RE200, cloning the existing 2.4 and 5 GHz networks
- As a part of setup I updated the FW on the router to the current version
3. Unplug the first RE200
4. Setup the second RE200, also cloning the existing 2.4 and 5 GHz networks
- As a part of setup I updated the FW on the router to the current version
5. Unplug the second RE200
6. Plug in the first RE200 in its desired location and confirm that the network and internet were accessible
7. Plug in the second RE200 in its desired location and confirm that the network and internet were accessible
8. Say a prayer and go to bed :)


Woke up this AM and my phone was not connecting the internet via the wireless network, so I was not happy, but tried turning Wi-Fi on the phone off and on again and things were OK after a bit. Rest of my family seems to be OK after in some cases similar off/on for Wi-Fi on their device. Overall network/Internet access seems OK, download/upload speeds seem OK.


So it look OK so far. Really hoping this holds up. I am worried what will happen the next time I have to reboot my router or the extenders, but we'll see what happens when the time comes.


If and when I have to reboot my router, I will always first unplug the extenders, reboot the router and confirm all devices are connected normally, and then plug in each extender.

Things were OK overall, but the whole system felt fragile, and every time I had to do anything on the network I was worried things would go awry again, and any flakiness in through-put/speed was very hard to troubleshoot.

So I returned the extenders and moved to the Eero mesh system. More expensive for sure, but set-it-and-forget-it quality and absolutely boring (in a good way) reliability.

Wanted to share that I am experiencing the same issues with a two RE210 and one RE200. At the moment I "solved" the issue by setting up different SSIDs for each unit, so I am running 4 WiFi networks plus a Guest network from my core router. This is NOT what I want but when I had all units broadcasting the same SSID, I would experience NO INTERNET at random times across the house. This is very dissatisfying as I didn't intend to require multiple SSIDs to cover my same home and it adds confusion and aggravation.
Did TP tech support confirm that multiple units could hold the connection or was your solution unique?