I decided to flash the newest firmware (21.02.2) on my wrt1900acs-v2. I'm starting from scratch so as not to make any mistakes with the conversion. I overcame a few hurdles with wireless (yay) and now I'm at the final step of configuring the guest network. I'm using LUCI to do this and have followed this guide: https://openwrt.org/docs/guide-user/network/wifi/guestwifi/configuration_webinterface
The instructions in this guide is very similar to what I did originally. The problem I'm having right now is it's able to connect to wireless, but it's not getting an IP address from DHCP.
config wifi-iface 'wifinet2' option device 'radio1' option mode 'ap' option ssid 'GUEST-NETWORK' option encryption 'sae-mixed' option key 'blah' option ieee80211w '0' option network 'guest'
config dhcp 'guest' option interface 'guest' option start '100' option limit '150' option leasetime '12h' list dhcp_option '6,126.96.36.199,188.8.131.52' list ra_flags 'none'
type config interface 'guest' option proto 'static' option device 'wlan1-1' option ipaddr '192.168.2.1' option netmask '255.255.255.0'
config zone option name 'guest' option output 'ACCEPT' option forward 'REJECT' list network 'guest' option input 'REJECT' config forwarding option src 'guest' option dest 'wan' config rule option src 'guest' option dest 'lan' option dest_port '53' option target 'ACCEPT' option name 'Guest DNS' config rule option name 'Guest DHCP' option src 'guest' option dest 'lan' option dest_port '67-68' option target 'ACCEPT'