# wireless:
config wifi-iface
   ...
   option network wifitrunk


# network:
config interface wifitrunk
   option proto none

config interface vlan8
   option type bridge
   option proto static
   option ipaddr 192.168.8.1
   option netmask 255.255.255.0
   option ifname "eth1.8 @wifitrunk.8"

config interface vlan9
   option type bridge
   option proto static
   option ipaddr 192.168.9.1
   option netmask 255.255.255.0
   option ifname "eth1.9 @wifitrunk.9"