iface="$1"

# Bring up the interface.
ip link set dev "$iface" up

if [ "$iface" = lan0 ]; then
  # TODO(reddaly): Configure fallback IP for appliance in case DHCP client
  # fails?
  echo "set $iface link up again"
  ip link set dev "$iface" up
  if [ -z "$(ip -o -4 addr show $iface)" ]; then
    run-dhclient "$iface"
  fi
fi