1[Unit] 2Description=Network Connectivity 3Wants=network.target 4Before=network.target 5 6[Service] 7Type=oneshot 8RemainAfterExit=yes 9 10# lo is brought up earlier, which will cause the upcoming "ifup -a" to fail 11# with exit code 1, due to an "ip: RTNETLINK answers: File exists" error during 12# its "ip addr add ..." command, subsequently causing this unit to fail even 13# though it is a benign error. Flushing the lo address with the command below 14# before ifup prevents this failure. 15ExecStart=/sbin/ip addr flush dev lo 16 17ExecStart=/sbin/ifup -a 18ExecStop=/sbin/ifdown -a 19 20[Install] 21WantedBy=multi-user.target 22