Dear linuxptp users, I'd like to set up the EVB-LAN7430 [1] as a PTP grandmaster, which serves the system's time to some embedded devices with one-step-sync. I've noticed that the time in the embedded devices will be set accordingly, but with a random offset of 0.5 to 30 seconds (therefore, no UTC or TAI issue). I assume, that the issue lies in the empty "Sync Message" which is send by the EVB-LAN7430, according to [2]. Please find a wireshark dump between one embedded device and the EVB-LAN7430 attached.
Have I miss-configured something, or is the EVB-LAN7430 still not capable of one-step-sync? By the way: The manufacturer of the embedded devices promised, that one-step-sync works with a dedicated grandmaster (that sends non-emtpy "Sync Messages"). Here is my minimal system setup: - ptp4l 2.0-00155-g61c6a70 build from a recent commit [3] - Ubunt 18.04 with Kernel 5.6.15-050615-generic - First, running `sudo ./phc2sys -c enp9s0 -s CLOCK_REALTIME -w -m -O 0` - Secondly, running `sudo ./ptp4l -m -l7 -4 -H -i enp9s0 -E -f /etc/ptp4l.conf` - with /etc/ptp4l.conf -- [global] -- priority1 127 -- twoStepFlag 0 Kind regards, Timo [1] https://www.microchip.com/DevelopmentTools/ProductDetails/PartNO/EVB-LAN7430 [2] https://tekron.com/news/release/1-step-vs-2-step-ptp/ [3] https://github.com/richardcochran/linuxptp/commit/61c6a708980217119e829e4b41ea2504e673e4fb -- Timo Korthals, M.Sc. Universität Bielefeld AG Kognitronik & Sensorik Exzellenzcluster Cognitive Interaction Technology (CITEC) Inspiration 1 (Zehlendorfer Damm 199) 33619 Bielefeld - Germany Phone : +49 521 106-67367 eMail : tkorth...@cit-ec.uni-bielefeld.de Internet: http://www.ks.cit-ec.uni-bielefeld.de/ _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
