@Vincent-TP After some tinkering I think I found what causes this, although I don't know yet how it causes it. I'm suspecting I have something like spanning tree turned on but I was unable to find it...

@snoop-snoop I also have a controller, that's the problem. :) In standalone I know where the setting is but in the controller I can't find it.

@snoop-snoop How do I do that? I'm guessing you mean to set the port as a tagged port for VLAN 2 like when the router is running standalone? I can't find those options in controller mode.

I have an EAP110 and an ER605 connected with a dumb switch now directly connected and both adopted on a software controller. I have an SSID and a LAN and everything works, clients connected to this...