@AmonNascaroth There is no "port access control" so actually you still need to use VLAN. However all these settings can be done on the router side, no need the residents' devices to support VLAN. And...

@OPAM Did you change the port PVID to 20？ You can share the existing settings you've done on the switch(screenshots) , so we can see what happens.

@Snakesrules It seem like this EAP is rebooting itself. Not sure how it was related to the controller but you may try another switch port(to connect this EAP)?

@Psyfun Have no idea about this issue. If it won't happen on other same model routers, maybe it is a hardware problem? Or compatible issue with a specified modem?

I also don't have many information about ER7212PC since I don't have one. But according to the specification it supports 24,980 sessions, means it is more powerful than ER605

@mwo I believe all switches in compatible list will be able to receive the update soon. However T1500 is not on the list. https://www.tp-link.com/us/omada-sdn/product-list/#omada-switch