I get what you said but as I mentioned my goal is to get those stats with
OpenFlow so it's not a matter of seeing the packets being dropped it's about
the counter itself that registers them.when using tc -s I can indeed see them
but only the tx I need both tx and rx + when I request port stats using
OpenFlow the counters are always 0 like with ifconfig!
is there any other tool that can make packets drop on veth interfaces or is
there any possible way that I can register the correct port stats?
Best regards.---------------------------------
> Date: Sun, 24 Jul 2016 11:05:27 -0700
> From: b...@ovn.org
> To: fat...@hotmail.com
> CC: discuss@openvswitch.org
> Subject: Re: [ovs-discuss] ifconfig counters issue!
>
> On Sun, Jul 24, 2016 at 10:29:43AM +0000, fatt 3issam wrote:
> > I'm trying to test poor connexion networks. So in a simple linear topology
> > (host1 ---- switch1 ------ (s2-eth2)switch2(s2-eth1) ----- host2) I created
> > packet loss (50%) in the interface s2-eth2 using the tc command, I pinged
> > from host1 to host2 and indeed the ping results are around the 50% loss.
> > Now the problem is when I try to prove these results with ifconfig I'm
> > seeing that the rx/tx drop counts are always 0 (the same goes for the
> > errors/overruns/collisions counters with their specific tests of course)!!!
> > P.S: I also tried to jam the network by creating some background trafic
> > with iperf tool but still seeing 0s!
> > How can I affect ifconfig counters or how to actually make veth interfaces
> > feel what's going on! because I need to have those numbers registred on the
> > port's stats to get them from OpenFlow after!!
> > I hope that this issue is clear and thanks in advance.Best regards.
> >
>
> This doesn't seem to have anything to do with OVS.
>
> I believe that when TC drops a packet, the drops will be accounted by
> the packet scheduler rather than by the interface, so you should be able
> to use some "tc -s" command to view drops.
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