ptp4l[162059.511]: ethtool
ptp4l[162059.511]: phc_device: /dev/ptp3
ptp4l[162059.511]: selected /dev/ptp3 as PTP clock
ptp4l[162059.514]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[162059.515]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[162067.402]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[162067.402]: selected local clock 04f021.fffe.ac31bd as best master
ptp4l[162067.402]: assuming the grand master role