local sid="6to4_$cfg"
uci -q batch <<-EOF
- delete radvd.iface_$sid
- delete radvd.prefix_$sid
+ revert radvd.iface_$sid
+ revert radvd.prefix_$sid
set radvd.iface_$sid=interface
set radvd.iface_$sid.ignore=0
set radvd.iface_$sid.interface=${adv_interface:-lan}
local sid="6to4_$cfg"
uci -q batch <<-EOF
- delete radvd.iface_$sid
- delete radvd.prefix_$sid
+ revert radvd.iface_$sid
+ revert radvd.prefix_$sid
EOF
/etc/init.d/radvd enabled && /etc/init.d/radvd restart