This is the current FW. Have you implemented the uplink to the router via a non-PoE port? The APs are connected to the PoE ports? Whereby you may already be reaching a critical area in terms of power? An AP Pro can possibly draw more than 20W, as far as I know. With 3x20 we are already at 60W, which corresponds to the maximum power of the switch. In borderline cases, this could possibly lead to a thermal shutdown! But it's probably enough, because usually the APs don't draw as much as the maximum possible. Otherwise I would check the cables! Everything should be running at 1000Mbit, otherwise this already indicates a fault in the cable! Good luck!

I had that too. The problem is the firmware. They obviously deliver devices with a beta release. If it says 5.x, then you have one of these. The officially released version should be 4.x. But you can only get it down by installing a higher beta and then you can downgrade. Ist hier beschrieben: https://community.ui.com/questions...