# /etc/systemd/system/phc2sys-boundary.service

[Unit]
Description=Synchronize PTP Boundary Clock PHCs
After=ptp4l-boundary.service
Requires=ptp4l-boundary.service

[Service]
Type=simple
ExecStart=/usr/sbin/phc2sys -a -r -m
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target