On 1/24/2020 10:26 AM, Eric Poquillon wrote: > Hi, > > I am using two instances of ptp4l on two computers. One is running as > slave and the other as master following initial series of annoucement > messages. > > Despite the fact I can see, using WireShark, DelayRequest UDP frames > sent by the slave passing on the network, following the SYNC and > FOLLOWUP frames from the master, the master never responds to them by a > Delay_Response. The slave remains in the Listenning state. >
How are you checking with wireshark? from the slave? from the master? are you ensuring to check without enabling promicuous mode on the devices? > If I change the transport protocol from L4 (UDP) to L2 (ethernet), then > the exchange seems normal and the whole set of SYNC, FOLLOWUP, > DELAY_Request and Delay_Response are visible on the network. > > Any idea of misconfiguration that may result in this abnormal behaviour > with L4 ? > In my experience, this usually is the result of a firewall blocking the L4 UDP packets. It's not the only explanation but it's fairly common. I would rule that out first. You should also be able to increase the log level on ptp4l to get it to print more data about what it's seeing. You might also check with pmc to see if ptp4l is noticing the packets. I believe there is a statistics command that got added recently, I believe GET_PORT_STATS_NP. best of luck! Thanks, Jake > Eric > > > > _______________________________________________ > Linuxptp-users mailing list > Linuxptp-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-users > _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
