Hi All,

I'm working on a new computer build based on a Supermicro X13SAE motherboard and am seeing something unusual on the ptp4l rms output. When using the I225 interface, ptp works as expected with rms errors reducing to around 500ns. When using the I219 interface, the reported rms error grows with each sample and never converges. Ethtool reports the I219 interface supports ptp filter features so I usually use that interface when setting up computers. Running RHEL 7.9 with the kernel updated to v6.3.8, linuxptp at v4.0.0. Tried another live linux distro with the same results.

Any thoughts as to why the errors would continue to grow on the one interface and not the other?

Thanks,

Jason


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