[ovs-discuss] IGMP Snooping on OVS 2.7.0
darragh.oreilly at hpe.com
Tue Oct 10 11:48:16 UTC 2017
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.
> -----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 184.108.40.206 -i 1iperf -c 220.127.116.11 -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
> discuss mailing list
> discuss at openvswitch.org
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