On 6/2/2023 9:01 PM, Trey Harrison wrote: > Subject kinda says it all.. We have previously been using chrony to > synchronize systems on a network, and chrony allows slave devices to > specify the ip address of their clock source. > > It does not seem obvious after reviewing documentation here that this > is possible: > > https://manpages.ubuntu.com/manpages/bionic/man8/ptp4l.8.html > To achieve this you need to deploy ptp in the unicast mode.
For details - please refer to UNICAST-MASTER.cfg and UNICAST-SLAVE.cfg in the config subfolder. And please post usecase-related questions to the linuxptp-users group. > We generally deploy systems in groups where one is the master clock > source and the others are started as "slaveOnly" devices. However, it > is possible that we may have multiple groups like this deployed on the > same network, where there may be a few sources competing to be the > "master clock".. but it is important for slaves in one group always > use their designated master clock, and not any other master clock that > may also be present on the network. > Do you assign different groups to different domainNumbers? > We have considered redesigning our systems so that there is only ever > a single master clock started on the network, with all other nodes > starting as "slaveOnly".. but that would involve adding further > configuration options to our software which would be one more thing > for the system configurators to get wrong when deploying them. > > TLDR; can a 'slaveOnly' ptp4l client specify the ip (ipv4) address of > the master clock it wants to use? TLDR; Yes - if you deploy it in unicast mode :) Thanks, Maciek > > Thanks! > > Trey > > > _______________________________________________ > Linuxptp-devel mailing list > linuxptp-de...@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-devel _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
