[Unit]
Description=Run wpe mon for %I
# Tie the service lifecycle to the kernel device for the interface
BindsTo=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.device

[Service]
Type=simple
WorkingDirectory=/root/wpe
ExecStart=/root/wpe/mon -i %I
Restart=on-failure
RestartSec=5

[Install]
# Make the service start whenever the device unit appears
WantedBy=sys-subsystem-net-devices-%i.device