Hello everyone. Thanks for the comments so far. To answer some of the questions and provide an update, the cabling in question is using U/FTP and has been channel tested/certified to TIA-CAT6a. It's also worth noting that I'm not seeing this issue with all APs in this particular installation, it was around 10% of a 60+ MR44 deployment. I'm confident the issue is where the cable meets the access point ethernet socket rather than loss on the cable itself. The AP I was playing with yesterday appeared to be super sensitive - as in if the cable doesn't meet the AP ethernet socket at exactly the correct angle, it's 100Mbps only. With the AP off the ceiling and ensuring there was no pressure on the ethernet jack resulted in a 2.5Gbps connection every time. Other MR44's in the same delivery appear to be much less sensitive. Ultimately, I think my problem is being caused by the sheer thickness of the CAT6a cable and the lack of space in the back of the AP to effectively allow the plug to sit in the socket without there being a slight angle on it and this is causing the pins to not make full contact.
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