PTP Network Mode

Enhanced PTP User Guide (UG1602)

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

Using the default hybrid mode, at startup, sfptpd will send three unicast Delay-Request messages to the upstream master clock. If the master fails to respond to these unicast messages, sfptpd will automatically switch to full multicast mode and thereafter send multicast Delay-Request messages. Once it has switched to multicast mode, sfptpd does not revert to unicast mode.

The ptp-network-mode option allows the following modes:

hybrid (default)
At startup, sfptpd will send 3 x unicast Delay-Request messages to the upstream master. If the master clock fails to respond, sfptpd will revert to multicast mode.
multicast
Always send Delay-Request messages as multicast messages.
hybrid-no-fallback
Always send Delay-Request messages as unicast messages - do not revert to multicast.

Usage

Change the option in the sfptpd configuration file.

ptp-network-mode [hybrid | multicast | hybrid-no-fallback]