eapd fun
I can tell you that what it is looking for is generally something in the form of
nvram set lan_ifnames="vlan18 eth1 eth2"
nvram set lan_ifname="br18"
nvram set lan1_ifnames="vlan102 wl0.1 wl1.1"
nvram set lan1_ifname="br102"
nvram set lan2_ifnames="vlan106 wl0.3 wl1.3"...