Recently i installed a UAP U6 Pro AP into my existing network using U6 at PoE+ adaptor https://eu.store.ui.com/eu/en/pro/category/accessories-poe-power/products/u-poe-at, purchased from UBNT. But when check the connection speed between the LAN port and U6 AP it shows 100mbps somehow. How is,this possible? It should be 1GBps at least. Lan connection is with Cat5a cable 1.5m long, that should provide 1gbps at least. When change the same cable and plug/unplug it shows 1gbps , but after some power outtage or power down it backs to 100mbps. Im using RoS 7.13.5 if meen something.
When disable “Auto Negotion” for that ethernet interface, and forced 1GBps Full, it breaks the connectivity for that port.
Yes i tryed with another cable Cat6 UTP, but it shows the same speed. I didnt expect to goes under 1GBps, but it should keeps at 1GBps. Currently it downgrades my speed to 100mbps for that port.
Replaced the cable with basic Cat 5a UTP cable, and boom it back to 1GBps. I dont know what is happening, but may be the thing that UBNT have issue with some STP cables. I found that my U6 Pro was made in 2227R that meen it is manufactured in 27 week from 2022 year, device what is affected from using STP cables, noted from themself https://help.ui.com/hc/en-us/articles/8823742725015-UniFi-6-Access-Point-Professional-U6-Pro-Advisory
Probles solved ! This may keeps here for some with the same issue like mine.
