[ -d "/sys/kernel/debug/trelay/${dev1}-${dev2}" ] && return
[ -d "/sys/class/net/${dev1}" -a -d "/sys/class/net/${dev2}" ] || return
- ifconfig "$dev1" up
- ifconfig "$dev2" up
+ ip link set dev "$dev1" up
+ ip link set dev "$dev2" up
echo "${dev1}-${dev2},${dev1},${dev2}" > /sys/kernel/debug/trelay/add
}