[Solved] Trouble setting up WiFi Access Point (DumbAP)

Installing and Using OpenWrt
5

I have an Archer C7 V2 running as an AP and my network config looks like this:

config interface 'loopback'
        option ifname 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config interface 'lan'
        option type 'bridge'
        option proto 'static'
        option netmask '255.255.255.0'
        option ipaddr '192.168.77.2'
        option dns '192.168.77.1'
        option gateway '192.168.77.1'
        option ifname 'eth0'
        option igmp_snooping '1'
        option multicast_querier '1'

config interface 'lan6'
        option proto 'dhcpv6'
        option ifname '@lan'
        option reqprefix 'no'
        option peerdns '0'

config switch
        option name 'switch0'
        option reset '1'
        option enable_vlan '1'

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option ports '1 2 3 4 5 6 0'

Now, the only thing that looks different (and meaningful) to me is the option ifname where you provided both eth0 and eth1, while I put just eth0 because after reconfiguring the switch layout there is no distinction between WAN and LAN anymore, so I assumed there would be no eth1 anymore. This works for me. I can log in via SSH, all my wifi clients get internet. When I log in over SSH I use a wired connection. I never tried that over wifi, but I assume it would work as well. You don't need the lan6 section, obviously, if you don't want your AP to get an IPv6 address.

I also noticed your config has some lines with different indentation than the others. Maybe that causes issues when the configuration is processed? Just a wild guess. Or was that a copy&paste issue?