This change to xlate_normal_mcast_send_mrouters() seems to fix it:
--- ./ofproto/ofproto-dpif-xlate.c.orig 2016-11-04 15:41:12.733632616 +0000
+++ ./ofproto/ofproto-dpif-xlate.c 2016-11-04 15:43:41.494137689 +0000
@@ -2326,7 +2326,8 @@
xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
LIST_FOR_EACH(mrouter, mrouter_node, &ms->mrouter_lru) {
mcast_xbundle = xbundle_lookup(xcfg, mrouter->port);
- if (mcast_xbundle && mcast_xbundle != in_xbundle) {
+ if (mcast_xbundle && mcast_xbundle != in_xbundle
+ && mrouter->vlan == vlan) {
xlate_report(ctx, "forwarding to mcast router port");
output_normal(ctx, mcast_xbundle, vlan);
} else if (!mcast_xbundle) {
Thanks,
Darragh.
> -----Original Message-----
> From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of O'Reilly,
> Darragh
> Sent: 03 November 2016 17:40
> To: b...@openvswitch.org
> Subject: [ovs-discuss] Duplicate multicast packets
>
> Hi,
>
> I'm running OVS 2.5.0 @be3f39c94, and I see duplicate multicast packets in the
> following scenario.
>
> # ovs-vsctl add-br br0
> # ovs-vsctl add-port br0 bond1
> # ovs-vsctl set Bridge br0 mcast_snooping_enable=true
> # ovs-vsctl set Bridge br0 other_config:mcast-snooping-disable-flood-
> unregistered=true
>
> Bond1 is connected to a physical switch trunk port, and 2 vlans are running
> IGMPv3 queriers. So this looks as expected:
>
> # ovs-appctl mdb/show br0
> port VLAN GROUP Age
> 1 1725 querier 11
> 1 1728 querier 3
>
> Now create a port on vlan 1725 to send multicast packets from:
>
> # ovs-vsctl add-port br0 p1725 tag=1725 -- set Interface p1725 type=internal
> # ip address add 172.17.25.25/24 dev p1725
> # ip link set dev p1725 up
> # ip route add 224.0.0.0/4 dev p1725
>
> # iperf -c 226.94.1.1 -u
> ------------------------------------------------------------
> Client connecting to 226.94.1.1, UDP port 5001
> Sending 1470 byte datagrams
> Setting multicast TTL to 1
> UDP buffer size: 208 KByte (default)
> ------------------------------------------------------------
> [ 3] local 172.17.25.25 port 49108 connected with 226.94.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec
> [ 3] Sent 893 datagrams
>
>
> Tcpdump on bond1 shows that ovs forwards each multicast packet twice to
> bond1.
> The kernel flow shows bond1 (15) twice in the action:
>
> # ovs-dpctl dump-flows | grep 01:00:5e:5e:01:01
> recirc_id(0),in_port(18),eth(src=66:d1:17:8e:c8:eb,dst=01:00:5e:5e:01:01),eth_t
> ype(0x0800),ipv4(proto=17,frag=no), packets:893, bytes:1350216, used:3.612s,
> actions:push_vlan(vid=1725,pcp=0),15,15
>
> # ovs-dpctl show | egrep "18|15"
> port 15: bond1
> port 18: p1725 (internal)
>
>
> The problem does not happen if there is only one VLAN running a IGMP querier.
> The problem does not happen if other_config:mcast-snooping-disable-flood-
> unregistered = false.
>
> I will build and test 2.6.1 tomorrow.
>
> Thanks,
> Darragh.
> _______________________________________________
> discuss mailing list
> discuss@openvswitch.org
> http://openvswitch.org/mailman/listinfo/discuss
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