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,
sfptpdwill send 3 x unicast Delay-Request messages to the upstream master. If the master clock fails to respond,sfptpdwill 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]