[Unit]
Description=Load static arp entries
Documentation=man:arp(8) man:ethers(5)
ConditionPathExists=/etc/ethers
After=network.service
Before=network.target

[Service]
Type=oneshot
ExecStart=/sbin/arp -f /etc/ethers
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target