> Date: Thu, 24 Jun 2021 17:19:35 +0000 > From: "Chang, Benjamin" <benjamin.ch...@gtri.gatech.edu> > I'm trying to setup my RHEL computer to sync to a NTP server with PTP
Do you mean that the server has PTP grandmaster capability, but the system time is synchronized to NTP? Trying to understand exactly what your phrase "NTP server with PTP" means. > ptp4l[85183.883]: selected local clock 00802f.fffe.313d9b as best master > ptp4l[85183.883]: assuming the grand master role" PTP uses what is called the best master clock algorithm to determine which device should serve time to all the other PTP devices on that network segment. There is a quality metric which can be set in the configuration file describing the expected accuracy of the time provided, so the device which advertises that it has the most accurate time should be chosen. If multiple devices have the same quality metric advertised, there is a tie breaking scheme. I forget the exact details at the moment, I think it may be based on comparing MAC addresses. Regardless of the that particular detail, either your device did not detect any other PTP devices, determined that the other devices on the network provided lower accuracy time, or provided the same accuracy time and lost the tie breaking mechanism. I did not see anything in the log about other devices detected, so I think you are in the first case of your PTP device did not see any other PTP devices on the network segment. -- Chris Caudle _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
