ptp_slave_chrony_fallback.cfg - ptp_slave_chrony_fallback.cfg - UG1602

This file shows how to configure sfptpd to act as a PTP slave, with fallback to chrony:

• A crny sync module is instantiated using the sync_module option:
  • The clock_control for chronyd is enabled.
  • A low priority is set for this sync module to avoid falling back based on quantitative performance alone.
• A PTP sync module is instantiated using the sync_module option.
• The PTP sync module is configured to act as a PTP slave by using the ptp_mode option.
• A selection_holdoff_interval is set to avoid switching on transient changes because restarting chronyd is disruptive.