Re: [Linuxptp-users] ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES error when slave syncs with GM

[Raj <mai...@gm...>]

Hi Miroslav,

Yes, ECU1 sends  Announce  packet  in every 2 sec , however the switch in
between (NETGEAR GS724Tv4) sends Announce packet to ECU2 every 1 sec.

I tried with "logAnnounceInterval  0" in both ECU1 & ECU2 and observed the
same issue as mentioned above.

Thanks,
Raj

On Mon, Sep 12, 2022 at 2:18 PM Miroslav Lichvar <mli...@re...>
wrote:

> On Sat, Sep 10, 2022 at 09:18:04PM +0530, Raj wrote:
> > We are observing that When ECU1 is active ECU2 initially takes a long
> time
> > (randomly 10 sec - 2min approx) to sync with ECU1(GM) and once ECU2
> > successfully syncs with ECU1 then after that there is no issue. ECU2
> > throwing "SLAVE to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES" error and
> > considering itself as GM by sending announce packet , after that again
> > considering ECU1 as GM and going to slave mode, this fluctuation on ECU2
> is
> > happening intially  when ECU2 is trying to sync with ECU1 and after some
> > time (randomly 10 sec -2min) ECU2 successfully  getting synchronozed with
> > ECU1.
> >
> >
> > The question is why does ECU2 take more time initially to select ECU1 as
> GM
> > ?
>
> If you capture PTP traffic on ECU2, do you see announce messages from
> ECU1 every two seconds (following logAnnounceInterval=1) ?
>
> --
> Miroslav Lichvar
>
>