ptp4l[162062.225]: ethtool
ptp4l[162062.225]: phc_device: /dev/ptp3
ptp4l[162062.225]: selected /dev/ptp3 as PTP clock
ptp4l[162062.228]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[162062.229]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[162067.214]: port 1: new foreign master 04f021.fffe.ac31bd-1
ptp4l[162069.493]: selected local clock 04f021.fffe.ac4420 as best master