Dear @wallawalla ,

wallawalla wrote

I run the test on phone 1 (Pixel 3a) to one speed test server and simultaneously on another phone (Pixel 4a) on the other speed test server and get about 220 Mbps down (each phone). If I run the tests independently I get about 400 - 500Mbps (occasionally can get closer to 600).

The devices are about 6 feet away from the AP. The house is centered in an acre of land with little channel interference (1-2% max).

There are a bunch more tests described in the above linked post, one where I speed test several devices simultaneously (and get like 100-150Mbps per device) then run a [fast.com](https://fast.com) test over WiFi and get a full 220 Mbps down on that device without affecting other device speeds! It's like the AP only permits ~600Mbps over 5Ghz for LAN

If you don't mind, you can try to reset this EAP first, then don't set anything, use the default SSID of the EAP to do the test again and see if the result will be reproduced.
If you still have problems, we suggest that you test the speed of the second layer first.

You could try only powering on the EAP, starting with a PC wired to the EAP as a server and a PC wirelessly connected to the EAP as a client.
Then do an iPerf speed test on the client PC to see if the speed is normal.
If so, you can try adding another PC as client PC2, and then still do iPerf speed test on the first client PC to see if the speed will be affected.

For an iPerf speed test you can refer to this article: How to use iPerf to test the speed between the EAP and the wireless client?

Thanks for your cooperation and patience!

Dear @wallawalla ,

wallawalla wrote

@Hank21 Resetting the EAP didn't change the results.
I configured the EAP to connect directly to a PC (no router or switch) and ran the iperf 2 speed tests as instructed:

With only a phone running `iperf -c` connected to the AP: 52-78 Mbit/sec

With only a laptop running `iperf -c` connected to the AP: 538-545 Mbit/sec
With both devices running `iperf -c` simultaneously:

• phone: 24-37 Mbit/sec
• laptop: 488-495 Mbit/sec

Transmit link speed of the phone was 866 Mbps, and transmit link speed of the laptop was also 866 M

Given that your problem is indeed a bit wired, suggest that you contact support directly to provide more detailed information and do further troubleshooting so that you can better solve the problem.

Best Regards!