@IanQ Have you checked the deco app for firmware updates? If not I would start there

@The_Cat See if this thread helps if not please get back to us https://community.tp-link.com/us/home/forum/topic/694644

@David-TP

@Ajmorse The difference in speed could be a problem with the port, a problem with the firmware, or a bad ethernet cable. I see your using cat 8 cables. The cable that you are getting over 1.5Gb I...

@Kuba_t0 Ty for that. David will reach out to you on the forums once he knows more. You may also be contacted via email from a senior engineer.

@Ajmorse Are you using the same cable on both ports or different cables?