On Tue, Jun 12, 2018 at 08:11:04AM +0000, Jord Pool wrote:
> The server I am trying to synchronise to this master (# ptp4l -i
> eno1 -m -q -4 -H) is using the i217-LM (rev 04) with the 3.4.0.2
> version of the e1000e driver installed.
>
> When synchronising the slave server to the master after boot, the
> synchronisation process is flawless as seen in the output
> below. However, when adding another server to the setup, which
> should take over the master function, there appears a very high
> offset including a very high frequency adjustment value.

Is the second server also an i217-LM, or what is it?

> When disconnecting the last connected device and letting the
> previous master take over the master role again, the slave server
> will not synchronise anymore; not even after killing the linuxptp
> processes and starting the synchronisation all over again: the
> master offset keeps high but decreases within 20 minutes to normal
> values, but the frequency adjustment value stays to the maximum of
> -59999999..

Sounds like a driver or HW bug.

Thanks,
Richard

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