Ugh, so simple. Add a custom interface as specified in this thread: Help configuring VLAN for WAN.
Contents of /etc/config/network:
config interface ‘loopback’
option ifname ‘lo’
option proto ‘static’
option ipaddr ‘127.0.0.1’
option netmask ‘255.0.0.0’
config globals ‘globals’
option ula_prefix ‘fd22:91e8:0e0f::/48’
config interface ‘lan’
option force_link ‘1’
option type ‘bridge’
option proto ‘static’
option ipaddr ‘192.168.1.1’
option netmask ‘255.255.255.0’
option ip6assign ‘60’
option _orig_ifname ‘eth0 eth2 wlan0 wlan1’
option _orig_bridge ‘true’
option ifname ‘eth0 eth2’
config switch
option name ‘switch0’
option reset ‘1’
option enable_vlan ‘1’
config switch_vlan
option device ‘switch0’
option vlan ‘1’
option ports ‘0 1 2 3 5’
option vid ‘1’
config switch_vlan
option device ‘switch0’
option vlan ‘2’
option ports ‘4 6’
option vid ‘2’
config interface ‘torguard_vpn’
option proto ‘none’
option ifname ‘tun0’
config interface ‘wan’
option proto ‘pppoe’
option username ‘user@qwest.net’
option password ‘password’
option ipv6 ‘0’
option _orig_ifname ‘eth1’
option _orig_bridge ‘false’
option mtu ‘1492’
option ifname ‘eth1.201’