On Fri, Nov 06, 2015 at 07:44:02PM -0800, Andrew Symington wrote: ... > On closer examination of the packets using wireshark I noticed that the > RSG2488 was modifying the correction field of the Sync message rather than > the Follow_Up message.
This is okay, since both correction fields are used to figure the offset. > Can anybody please confirm whether it is normal behaviour for ptp4l, or if > it is likely a configuration / firmware issue with my switch? I have > included some ptp4l traces below, and the packet dump is available here: > http://filebin.ca/2LgrZ4ShbY56 > > I am using linuxptp 1.6-00001-g6eec5a0. The problem is in the peer delay calculation. The function, tsproc_update_delay requires four non-zero time stamps. However, when using one step, two of the time stamps are zero. So this looks like a bug in the 'tsproc' code which was introduced in v1.6. Can you please try v1.5 to confirm? Thanks, Richard ------------------------------------------------------------------------------ _______________________________________________ Linuxptp-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
