I followed the instruction to sync the time, but when I proceed this step there is error.
nvidia@tegra-ubuntu:/home/nvidia/drive-t186ref-linux/samples/nvavb/daemons$ sudo ./ptp4l -f ./gPTP.cfg -p /dev/ptp0 -i eth0.200 -s -m -D -l 7
selected /dev/ptp0 as PTP clock
ioctl SIOCGIFHWADDR fialed: No such device
failed to generate a clock identity