[Unit]
Description=DHCP Client
Documentation=man:dhclient(8)
Wants=network.target
After=network-pre.target systemd-sysctl.service systemd-modules-load.service
Before=network.target shutdown.target network-online.target
ConditionPathExists=!/run/initramfs/net.up.flag

[Service]
Type=forking
ExecStart=-/bin/sh -c 'udevadm settle && dhclient -nw'
PIDFile=/run/dhclient.pid

[Install]
WantedBy=multi-user.target
WantedBy=network-online.target