A PTP slave must be in the same PTP Domain as the upstream master clock.
PTP messages received by
sfptpd that are not from the configured domain will be ignored. The default domain value in
sfptpd config files is 0 (zero).
The domain value should be configured to match the PTP domain of the upstream master clock. Configure the domain with the
ptp_domain parameter in the
sfptpd config file.