Guest Wi-Fi across 2 dumb APs

Ok... so normally I'd recommend that we use just one port and it all go through your managed switch. But, let's setup two ports for this so that you can connect directly to the other AP in the event that you want to verify the OpenWrt configs before you get to the switch itself.

I'm referencing the configs from here

First thing we're going to do is setup bridge VLANs.

config bridge-vlan
        option device 'br-lan'
        option vlan '1'
        list ports 'lan1:u*'
        list ports 'lan2:u*'
        list ports 'lan3:u*'
        list ports 'lan4:u*'

config bridge-vlan
        option device 'br-lan'
        option vlan '2'
        list ports 'lan1:t'
        list ports 'lan2:t'

Next, delete this:

and then edit the lan and guest networks to use br-lan.1 and br-lan.2 as follows:

config interface 'lan'
        option device 'br-lan.1'
        option proto 'dhcp'
        option force_link '1'

config interface 'guest'
        option proto 'static'
        option device 'br-lan.2'
        option ipaddr '192.168.2.1'
        option netmask '255.255.255.0'

Now, you can reboot this unit and VLAN 1 (the lan) will be untagged on all ports, VLAN 2 will be tagged on ports 1 and 2.

Next, we'll look at your other AP... can you post the config for that, please?