cat /etc/sysupgrade.conf | grep 99-fix-arpbind || echo /etc/uci-defaults/99-fix-arpbind >>/etc/sysupgrade.conf
[ ! -f /etc/init.d/arpbind ] || cat /etc/init.d/arpbind | grep change >/dev/null && exit 1
sed 's/dev $3/dev $3 || ip neigh change $1 lladdr $2 nud permanent dev $3/' -i /etc/init.d/arpbind; exit 1