[ovs-discuss] IGMP Snooping on OVS 2.7.0

[Sterdnot Shaken]

Thanks Ben and Darragh!

I will give your troubleshooting suggestions a try!

Steve

On Tue, Oct 10, 2017 at 5:48 AM, O'Reilly, Darragh <darragh.oreilly at hpe.com>
wrote:

>
> I cannot reproduce on 2.7 even without the patch.
> The IGMP and multicast packets need to hit a flow with action NORMAL.
> Use  'ovs-ofctl dump-flows ovs-br' to see the flows.
> Run 'ovs-appctl mdb/show ovs-br' to see the multicast table.
>
> Regards,
> Darragh.
>
> > -----Original Message-----
> > From: ovs-discuss-bounces at openvswitch.org [mailto:ovs-discuss-
> > bounces at openvswitch.org] On Behalf Of Ben Pfaff
> > Sent: 10 October 2017 01:14
> > To: Sterdnot Shaken <sterdnotshaken at gmail.com>
> > Cc: ovs-discuss at openvswitch.org
> > Subject: Re: [ovs-discuss] IGMP Snooping on OVS 2.7.0
> >
> > On Mon, Oct 09, 2017 at 04:08:24PM -0600, Sterdnot Shaken wrote:
> > > Just curious why, with igmp snooping enabled on the OVS bridge, I am
> > > still getting multicast traffic on other VM's (that shouldn't be
> > > getting it) on the same vlan?
> > >
> > > Here's how I'm enabling IGMP Snooping:
> > >
> > >
> > > *ovs-vsctl set Bridge ovs-br mcast_snooping_enable=trueovs-vsctl set
> > > Bridge ovs-br
> > > other_config:mcast-snooping-disable-flood-unregistered=true*
> > >
> > > Then, I run iperf between two nodes like this to simulate mcast
> traffic:
> > >
> > >
> > > *iperf -s -u -B 239.1.1.1 -i 1iperf -c 239.1.1.1 -u -T 32 -t 3 -i 1*
> > >
> > > While this test is active, I see all this traffic on those other nodes
> > > in that same vlan...
> > >
> > > Anyone have any ideas? Are their OVS commands that allow me to see
> > > more details regarding IGMP Snooping besides it being enabled/disabled?
> >
> > Thank you for the report.
> >
> > There is one IGMP related bug fix patch that got into 2.8 but didn't get
> > backported to previous versions.  I've now applied this to branch-2.7.
> > It would be a good idea to try it to see if it fixes the problem.
> >
> > You should be able to find out more about multicast snooping activity by
> turning
> > up the log level for the ofproto-dpif-xlate module, e.g. with
> "ovs-appctl vlog/set
> > ofproto-dpif-xlate".
> > _______________________________________________
> > discuss mailing list
> > discuss at openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
>
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