I have a question related to the question below. If you use a boundary clock
between gPTP and PTP, does the PHC have to be shared by both NICs? What I mean
is the PHC is shared by both NICs while each NIC independently timestamps PTP
frames using the same PTP hardware clock.
If each NIC has an independent PHC I think phy2sys has to be used two
synchronized two instances ptp4l but I am not sure how this configuration could
work as a boundary clock.
Eric Decker
-----Original Message-----
From: Richard Cochran <richardcoch...@gmail.com>
Sent: Tuesday, May 16, 2023 9:42 AM
To: Fueloep, Tamas <tamas.fuel...@siemens.com>
Cc: linuxptp-users@lists.sourceforge.net
Subject: Re: [Linuxptp-users] gPTP and PTP on the same computer
On Tue, May 16, 2023 at 08:35:36AM +0000, Fueloep, Tamas via Linuxptp-users
wrote:
> Dear LinuxPTP mailing list participants,
>
> First of all, thank you very much for this amazing software - it
> really makes life easier and it is fun to use. 🙂
"fun to use?" hahaha that is new!
> I would have a question, because I can't get a grasp on something. I
> have a setup, where multiple sensors are connected to the same
> computer, each of the sensors are connected to a dedicated network
> interface. Some of the sensors are only compatible with gPTP and some
> of them are only with PTP. The default configuration files that come
> with the ptp4linux installation are working perfectly independently,
> but I cannot make the sensors work in a parallel way. I have tried to
> run multiple ptp4l instances and for the PTP I've used the
> 'default.cfg' and for the gPTP the 'automotive-master.cfg'. Obviously
> this does not work as expected, but I am a bit lost on figuring out
> what would be the ideal setup in this case.
> Could you please help me what is the right concept to use in this situation?
You can run ptp4l as a Boundary Clock on multiple interfaces at once, and you
can freely mix and match profiles on the different ports.
For example:
ptp4l -m -q -i eth0 -i eth1
or in a configuration:
[global]
# ...
[eth0]
# eth0 options...
[eth1]
# eth1 options...
The only thing I'm uncertain of is the Automotive Profile. Most of the
configuration options are per-port, but you will probably not set the global
option inhibit_delay_req.
See the man page and/or config.c to learn which options are per-port.
Thanks,
Richard
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