# /etc/systemd/system/ptp4l-boundary.service

[Unit]
Description=PTP Boundary Clock
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
ExecStart=/usr/sbin/ptp4l \
    -i eno4 \
    -i enp4s0 \
    -i enp5s0d1 \
    -f /etc/linuxptp/ptp4l-boundary.conf \
    -m
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target