Delay-Request Intervals

Enhanced PTP User Guide (UG1602)

Document ID
UG1602
Release Date
2022-10-18
Revision
1.0 English

Previous sfptpd releases allowed a maximum Delay-Request interval of 4 (24 =16 seconds) ignoring any larger value set by an upstream master clock. Version 3.3.0.1007 sfptpd aligns with the IEEE-1588 default PTP specification which supports an interval of 5 (25=32 seconds).

Note: A Delay-Request interval of 32 seconds is not recommended and might lead to poor synchronization performance. Ideally the Delay-Request interval will be at the same rate as received SYNC messages.