WRT3200ACM with TP-Link CPE210 as AP for guest-network


i'm trying to set up guest network for max 200 clients. Therefore i got a WRT3200ACM and 4 TP-Link CPE210 Access Points.
I read a lot and would have thought it should be possible. But it seems harder than expected.
So is it even possible to create a VLAN over all 4 ethernet-ports and connect the 4 APs. If so, what are the steps to do so?

Further on i would like to create a transparent proxy with squid. But that's another problem i will get to when the guest network works.

Thank you very much!

Yes, I can't tell you how to do it through the LuCI GUI (as I don't use it for configuration myself), but it is straightforward in the config files. See https://openwrt.org/docs/guide-user/base-system/basic-networking

Basically you need to create the VLAN interface on the Ethernet device, as well as assign each of the VLANs to the switch ports of interest (including the Ethernet phy), more than likely as "tagged".

Why make a vlan? can't you just set the APs up as dumb APs?