I've search around a bit about this issue but it is very confusing, a lot of times the instructions assume the AP's WAN port as the internet gateway connection, this is not the case.
This is the basic network layout:
Internet Router <-> Switch / DHCP Server <-> (((( OpenWRT AP )))))
The main cabled and wireless network is 192.168.1.x
I assume the secondary wi-fi network should be on a different subnet, lets assume 192.168.10.x
So, the AP has DHCP disabled, static IP, and just forwards the broadcast requests which the DHCP server eventually replies to. What I would like to do is create a secondary wi-fi network completely isolated from everything else and can only just use internet, but keeping in mind that the internet gateway is not directly connected to the AP. Does the configuration involve setting up vlans and tagging in other parts of the network or can everything be done in the AP itself?
A quick write up or useful links for this particular setup would be much appreciated.