@SasoC If the DHCP server is configured on the switch and running, you probably just need to configure the access ports correctly. Have each access port untagged in a single VLAN and its PVID set to...

@DalanNet I think the best practice is to have a single trunk on a LAG and control the flow with QoS, if necessary. That leads to the best use of bandwidth and provides redundancy. And, yes,...

Yes, it disconnects the client. The client may or may not connect to the same SSID or even AP. It all depends on the client's Auto Connect settings and the current Wi-Fi situation.

@Napsterbater My 660HD APs work fine with the v1.2.7 Build 20231214 Rel. 34160. I haven't tried any higher version.

@GioBonvi It looks like you have the right understanding of the theory, but for some reason you hope to use unmanaged switches. Well, give yourself a favour and forget about this idea. Use only...

@MR.S Well, the OP is trying to use the 'ip helper' (L3) having a trunk link (L2). Also, pfSense may not even support routed DHCP requests.