#!/bin/sh set -e case "$PHASE" in pre-up) settings= [ -n "$IF_ETHTOOL_ETHERNET_PORT" ] && settings="port $IF_ETHTOOL_ETHERNET_PORT" [ -n "$IF_ETHTOOL_MSGLVL" ] && settings="msglvl $IF_ETHTOOL_MSGLVL" [ -z "$settings" ] || ethtool --change "$IFACE" $settings ;; up) ;; esac