Hi @evoon 

Thanks for posting in our business forum.

evoon wrote

Hello,

My setup is a ER706W router, with a TL-SG1005P switch that supplies over PoE a EAP-650 Wall Plate. The wireless network on the APs is a normal 2.4GHz (5GHz off) WPA2-PSK network. On the Omada controller of the router, I have activated Fast Roaming, AI Roaming, and Mesh, and RSSI threshold  on both AP in the devices tab.

I am trying to develop a fast roaming application on an ESP32 development board, that has Wi-Fi 2.4Ghz and 802.11ax capabilities. I programmed it so that below a certain RSSI threshold, it sends a BSS transition management query to the ER706W router.

I figured that even under a low RSSI value (< -75 dBm), none of the AP it is connected to will initiate a roaming, I don't know if this is normal behavior ? I even tried setting a RSSI Threshold in the devices tab, to force a STA to disconnect which is not roaming, it just disconnects and reconnects after some time, which is not seamless and induces a ~2 seconds offline delay.

What's the max RSSI value you test and conclude to start a roaming?

You have an option in the controller to set up the RSSI threshold. If you did not set it, that's why you don't switch. Unless you have set it to a value and you don't switch at that value. That should be a problem.

But, when you are NOT using an Omada product, the functionality is NOT guaranteed. I am not certain if our EAP owns a proprietary protocol for the fast roaming but we do use 802.11 k/v/r to enable the fast roaming.

evoon wrote

With roaming initiated by the STA : Below a RSSI threshold (I tried -40, to -70), my ESP32 sends a RRM neighbor report request, it gets a proper response with the corresponding other AP available. Yet, when after that the ESP32 sends a BSS Transition Query with this candidate, nothing is sent back by the AP. However, I need to get in return a BSS Request, that will make the STA roam.

I did a Wireshark capture with a Wi-Fi adapter in monitor mode, I couldn't add it as a file so I uploaded it on google drive (https://drive.google.com/file/d/1dObe7A5G65xgKrn0UUZTqvQEen7bbCpd/view?usp=sharing).
The STA is Espressif_43:6d:38, the main router is TP_Link_a6:36:09 and the other AP I want to connect to has a 3c:52:... MAC address. 4-way handshake starts at frame 285, and Neighbor report request is frame 3497, response is 3499/3500 and the BSS Transition Management Query follows at frame 3503. The same pattern repeats itself a few times after that.

The seamless roaming seems to change AP correctly with my iPhone 15, but I can't tell for sure, because I don't know if it disconnects and reconnects, or if it initiates a 802.11r roaming.

Could you enlighten me on this ? If you need additional information or debug logs (which I don't know how to get in full detail in Omada) tell me. I already opened a ticket on TP-Link zohodesk but without answer.

Have a great day,
evoon.

Again, the whole question seems to be about the EAP. I don't see you mention ER706W failing in its WIFI capability.

I will transfer your case to the AP page.

And, please note that you are using a board that is a third party, I don't think we have to support you on this one unless you have problems reside between our products beyond a third-party board.

We did not guarantee EAP fast roaming capability with a third-party model or a developer board. What is Fast Roaming of TP-Link Business Wi-Fi Products?

Hi @evoon 

Please also try disable 802.11r on your SSID settings. We saw some reports that Apple devices may have roaming issue when the APs enable 802.11r.

Hi  @evoon 

After reading your notes, I want to confirm one more thing with you:

Do you have the SSID applied to both of your Gateway and the EAP. You may send us the screenshot of SSID settings page;

Hi  @evoon 

Could you please help confirm, your testing client device support 802.11 k.

We did some research and found that:

If the device does not support 11k and only supports 11v, the roaming process cannot provide correct roaming suggestions