Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC

[Andre P. <and...@sr...>]

On 1/11/23 9:28, Miroslav Lichvar wrote:
> On Wed, Nov 01, 2023 at 09:04:12AM +0100, Andre Puschmann wrote:
>>   /opt/linuxptp/ptp4l -2 -i enp1s0f1 -i enp1s0f0 -f /opt/ptp4l_cfg/bc.cfg -m
>> -l 6
>> ptp4l[851.735]: selected /dev/ptp1 as PTP clock
>> ptp4l[851.735]: port 1 (enp1s0f1): PHC device mismatch
>> ptp4l[851.735]: port 1 (enp1s0f1): /dev/ptp1 requested, ptp0 attached
>> ptp4l[851.735]: failed to open port enp1s0f1
>> failed to create a clock
>>
>> I am not sure where this is coming from but indeed the first interface seems
>> PHC 1 assigned and the second PHC 0. Not sure if this is an issue.
> 
> It is an issue. The two ports of the NIC don't share the same PHC, so
> there needs to be something keeping them in sync (phc2sys -a) and
> ptp4l needs to be told to not verify the PHC index numbers. That's the
> boundary_clock_jbod option. Don't expect best accuracy in this setup.

Thanks Miroslav. I'll give this a try tomorrow. Is there any other NIC 
that you can recommend and/or know that has a shared PHC among it's ports?

Thanks
Andre