[ovs-discuss] Capturing timestamp in a switch

Ajeeth Kannan (RIT Student) ak5378 at rit.edu
Wed Oct 19 00:24:25 UTC 2016


Hello Justin,

I would like to uniquely identify a packet that is being going through the
switch and store it in a file with the timestamp when it reaches an OVS.
This is what I mentioned as capturing timestamps initially. Could I do this
by altering the code in datapath module?

Thank you,
Ajeeth Kannan

On Tue, Oct 18, 2016 at 7:29 PM, Justin Pettit <jpettit at ovn.org> wrote:

> As I mentioned before, please don't drop the mailing list.
>
> It's open source, so you're free to modify the datapath.  Once again, I
> don't know what you're storing or where you'd store it, but you can modify
> the code on your system as much as you'd like.  It's not clear whether the
> patches would be accepted upstream due to the questions I mentioned earlier.
>
> --Justin
>
>
> > On Oct 19, 2016, at 12:58 AM, Ajeeth Kannan (RIT Student) <
> ak5378 at rit.edu> wrote:
> >
> > Hello Justin,
> >
> > Could I alter the code in datapath module to store the timestamp ?
> >
> > Thank you,
> > Ajeeth Kannan
> >
> > On Tue, Oct 18, 2016 at 6:45 PM, Justin Pettit <jpettit at ovn.org> wrote:
> > Please don't drop the list.
> >
> > The dataplane is just forwarding packets through it, so I'm not sure
> what it would store.  For a particular datapath flow, we keep the last time
> that a packet hit it, but that's about it.  As I mentioned, if you want to
> send copies of packets to a collector, you could look at sFlow or IPFIX.
> >
> > --Justin
> >
> >
> > > On Oct 18, 2016, at 8:04 PM, Ajeeth Kannan (RIT Student) <
> ak5378 at rit.edu> wrote:
> > >
> > > Hello Justin,
> > >
> > > I am trying to store the timestamp of the packets that go through OVS.
> Is there a way to do it ?
> > >
> > > Thank you,
> > > Ajeeth Kannan
> >
> >
>
>
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