On Tue, Mar 07, 2023 at 12:41:52PM +0200, Kamil Zaripov wrote:
> I have a setup where master running on host with Intel I210 network
> card and several slaves. Among them some can send PTP messages only
> over UDP and some of them only over Ethernet. So I’m using two ptp4l
> presses. One of them called with -2 command line argument and
> another one with -4 and both of them use same port passed with -I
> argument. Though I210 network card cannot concurrently timestamp two
> packages.
>
> This lead to the race - if both of ptp4l processes will send Sync
> messages at the same time with hw tx timestamp request to gib driver
> only one of them will get timestamp and another one will timeout
> waiting for the timestamp.
>
> Is it possible to sync ptp4l processes so they will not send Sync
> messages simultaneously?
No, but why not run one process configured with two interfaces?
For example:
ip link property add dev eth1 altname eth1a
Then make a config. file:
[eth1]
network_transport UDPv4
[eth1a]
network_transport L2
I think that should work for your use case.
HTH,
Richard
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