On Sat, Feb 19, 2022 at 12:05:29AM +0100, Jakub Raczyński wrote: > I cannot say on which precisely, would need more studying of Linux kernel. > Seems that newer version of 4.9 has this implemented. > Basically, problem originates from this > https://unix.stackexchange.com/questions/523529/should-the-linux-kernel-perform-an-igmp-rejoin-on-link-up > And ptp4l does not take care of that and neither are some kernel versions.
You are mistaken. ptp4l closes its sockets on link down and then opens new sockets (joining once again) on link up. > The question is whether ptp4l should worry or that or not. I must > agree that would be a bit of "voodoo engineering". But some products > seem to have locked kernel version, that is EOL for some time, yet > no updated are available. For user, it is hard to debug why is it a > case (why PTP multicast, both L2 and L4, is blocked on switch), so > at least some big warning about this would be appreciated. It isn't my job to debug your switches. Please take the issue up the switch vendors. Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
