Re: Hardware Timestamping Problem

[Christian <christian.rupp.stuttgart () freenet de>]

The experiments I made today actually suggest that in my case tcpdump 
uses the hardware clock for incoming packages and the software/unix 
clock for outgoing packages.

I changed the System clock of one Server with date -s and then looked at 
the capture of Ping packages.
Incoming packages on the changed server used the hardware clock while 
outgoing packages used the changed system clock.

Is there a way to change that?

Am 09.06.2016 um 15:47 schrieb Michael Richardson:
> Guenter Ebermann <guenter.ebermann () googlemail com> wrote:
>      > Hardware timestamping of sending/receiving buffer descriptors is done
>      > by NIC.
>
> Receiving I understand.
>
> Are you sure that the hardware is going to timestamp sent packets, and then
> turn around and send the back to the kernel?

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