Hi All, After weeks of sending screenshots and packet captures, I received this response from Meraki. I have managed to find the issue that is causing the slow speed problem over time and after a reboot, the issue just goes. Thanks to the packet capture taken from the working and AP and broken AP we identified that the issue was being caused because the client was sending aggregated frames and the AP wasn't. Initially, both the AP and the client decide to send aggregate frames then all of a sudden after a while the AP doesn't send aggregate frames. Hence when you restart the AP it's all fresh and negotiates with the client again to send aggregate frames and the problem disappears. We are currently working, on fixing this issue on a feature firmware release with our internal team, however, at this point, the problem is still premature and we are looking more into why the AP goes into stops sending aggregate frames. We know that the issue came around firmware version 27.x. Our internal team has asked me to ask you if you would be willing to test our beta MR 28.1 to see if the problem also persists on this firmware. If you are willing to upgrade a couple of APs to MR28.1 to test let me know and I can arrange a session to ping the firmware on the APs you want to test on without having to upgrade the whole network to MR28.1 I am just waiting for our summer holidays to start and then I will be in a position to test MR28.1 on a few of the AP's. I was pleased to see that they had identified a possible source of the issue since we have been chasing this for weeks and questioning ourselves whether it was something that we had done or something we were missing with the configuration of our network. Hopefully, the issue is resolved in the next firmware update, but ill update you all again once i have tested further. Kind regards Matt
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