TheMazzim M wrote:
> BUT, if I look at the kernel config file for 4.2.0-27-generic Ubuntu 14.04
> kernel, I discover that:
>
> # CONFIG_NETWORK_PHY_TIMESTAMPING is not set
>
> Question:  Why is this not consistent with what ethtool reports??

I did not see an explicit answer to this part of your question.
PTP timestamp can be in either the MAC layer or the PHY layer.
PHY_TIMESTAMPING is not configured in your kernel, so your Ethernet device
is receiving or inserting the time at the MAC layer.

-- 
Chris Caudle



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