[Unit]
Description=Network initialization
Documentation=man:interfaces(5) man:ifup(8) man:ifdown(8)
DefaultDependencies=no
Before=shutdown.target
Conflicts=shutdown.target
Wants=systemd-udev-settle.service
After=systemd-udev-settle.service

[Service]
Type=oneshot
RemainAfterExit=yes
SyslogIdentifier=networking
TimeoutStopSec=30s
EnvironmentFile=/etc/default/networking
ExecStart=/usr/share/ifupdown2/sbin/start-networking start
ExecStop=/usr/share/ifupdown2/sbin/start-networking stop
ExecReload=/usr/share/ifupdown2/sbin/start-networking reload

[Install]
WantedBy=basic.target network.target shutdown.target