Hi,

1. Wireless connection is susceptible to environment interference, it may cause the unstable connection problem and SSID disappearance problem. There are many interference source in our environment, especially for 2.4G radio. Such as, the interference of other wireless device, Blue tooth, microwave oven, USB interface. You can scan the wireless environment by tools first, such as inSSIDer or WI-FI Analyzer. You can refer to https://www.cnet.com/how-to/how-to-optimize-your-wi-fi-network-with-wifi-analyzer/ . Then you can do the wireless optimization according to the scanning result.

For example:

1) Set the channel width of each EAP to 20MHz. (Reduce the wireless interference)

2) Set the channel of EAP to 1/6/11 channel respectively in 2.4G radio and setting different channel (36/40/44/48) in 5G radio. It will reduce the wireless interference between each EAP.

3) If the distance between EAP is less than 15m, you can lower down the TX power of EAP.

2. Wireless speed of wireless clients depends on the link speed between wireless clients and AP. You can check the link speed of your device first. The actual speed of device is about 1/3-1/4 link speed. You can also use ixchariot or iperf to check the throughput capacity of this EAP directly, then you can see if it is the problem of this EAP.

Hope it may help you.

Best wish!

Hi, heres a Possible Solution that worked for me:

I had faced a similar problem with my new router 940N (450Mbps N-Router) when using with my BSNL-FTTH 50Mbps Fiber connection.

From the LAN on the router i could get >50Mbps but over Wi-Fi it was simply limited to a slower speed of 20Mbps for some reason.

I tried with multiple devices and they all showed the same slow speed of 20~25Mbps downloads/uploads.

I had contacted the TPLink Tech-support but could not get this solved over remote/Tele-call.

The next day after a few trials of my own I finally found the root-cause and solved it and its been working great since then.

The Solution that worked for me:

Since this is an N-Router, at the Wireless security settings, TP-Link Setup wizard itself recommends not to set TKIP Encryption but my BSNL technician did set TKIP wrongly during installation.

On finding this info from the Wireless Security settings page itself, I tried changing it back to the alternate option of AES. 

Now here is the strange and funny part.

For some reason the Router though it showed the settings saved as AES, it seems it never was actually applied it. The speed was still slow at <20Mbps.

Now even after a hard-reset and fresh re-configuration of the Router with AES encryption settings, it did not work.

Then I tried disabling the "Security" itself first, on which I got >55Mbps speed and then next I set it to AES.

This time it seemed to have applied the settings correctly and the high speed was retained and i have never had the slow-speed  issue again.

To confirm this fix i reproduced the steps of going with TKIP and Hard Reset etc and finally back to AES and it has proved to be correct.

Not sure if its a bug in the Router.

Anyway, for anybody facing this issue, please do try these steps. I was almost on the verge of returning my router via Amazon but managed to avoid doing it.

Hope this helps somebody with the same or similar router.

-Best Regards,

Thomas

@Thomas-ZION Thanks for the tip! TP-Link doesn't seem to have fixed this bug, as I experienced the same issue (<20Mbps throughput with WPA2-PSK and encryption set to AES256). After I disabled encryption and then reenabled it, the speed was over 200 Mbps.

@hk7310 Hi sir, I have an issue on my eap as well, just disabled airtime fairness this it looks like thats was the issue for me I guess but ive made alot of troubleshooting which one fixed the issue.

hk7310 wrote

Hi, Do you enable airtime fairness. The different is great.

@R1D2 

R1D2 wrote

@Alozzy, @Thomas-ZION, if you experience max. throughputs in the 20 to 22 Mbps range, you did screw up the configuration by limiting WiFi mode to 802.11a/b/g only.

 

802.11n mode requires WPA2 / AES encryption as well as QoS (WMM, WiFi Multi-Media). If you change encryption to either WPA method or TKIP encryption or if you disable QoS, the maximum WiFi speed is limited to 54 Mbps (g and a modes), which equals roughly 22 Mbps data throughput.

 

So this is not a bug, but a bad configuration and it applies to any AP, not only TP-Link devices.

Hmm, im experiencing this too, but with the EAP-245. I have verified that i'm running n mode, and have WPA2 / AES + WMM... So my guess is that somewhere there's a bug..

@Thomas-ZION Thank you! This was driving me crazy. changing to no security then back to AES wasnt all that worked for me. I had also changed from 802.11a/n/ac Mixed mode to 802.11.1c (while encryption was off) this made my speed come back to over 200 Mbps. then  was able to turn 802.11a/n/ac Mixed mode back on and AES encryption. Thank you again! Soo stupid this happens,