I've attached the wireshark dump to this message.
On Tuesday, June 30, 2020 04:32 CEST, "Timo Korthals" <tkorth...@cit-ec.uni-bielefeld.de> wrote: > 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/ -- 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/
ptp comm JAI_SP500C LAN7430 PTP_Layer_3.pcapng
Description: application/pcapng
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