Re: [Users] ovirt 3.2 - high multicast packet loss

From: "Winfried de Heiden" <wdh(a)dds.nl&gt; To: users(a)ovirt.org Sent: Thursday, March 21, 2013 10:14:04 AM Subject: Re: [Users] ovirt 3.2 - high multicast packet loss So far no reactie about the multicast packet loss...... I bumbed into this bug: https://bugzilla.redhat.com/show_bug.cgi?id=880035 This looks the same as the problems I am suffering using oVirt 3.2: heavy multicast packet loss after some time. This the bug affect oVirt 3.2 ovirt-node (2.6.1-20120228.fc18)? Can anyone reproduce the problem (omping between 3 virtual nodes)? Winfried Op 18-03-13 16:58, Winfried de Heiden schreef: > Same for Debian 6 (x86_64); 47% packet loss: > > ssmping -c 500 192.168.1.234 > > --- 192.168.1.234 statistics --- > 500 packets transmitted, time 500001 ms > unicast: > 500 packets received, 0% packet loss > rtt min/avg/max/std-dev = 0.352/0.675/0.863/0.072 ms > multicast: > 265 packets received, 47% packet loss since first mc packet (seq > 1) > recvd > rtt min/avg/max/std-dev = 0.414/0.703/0.885/0.086 ms > > > Winfried > > Hi all, >> >> Playing around with Red Hat Clustering, it turns out I have a >> hughe >> multicast packet loss: (Centos 6.4 - x86_64 with all updates) >> >> omping 192.168.1.211 192.168.1.212 -c500 (node1) >> omping 192.168.1.212 192.168.1.211 -c500(node2) >> >> will give almost 50% loss! >> >> 192.168.1.211 : unicast, xmt/rcv/%loss = 500/500/0%, >> min/avg/max/std-dev = 0.330/0.610/0.789/0.064 >> 192.168.1.211 : multicast, xmt/rcv/%loss = 500/268/46%, >> min/avg/max/std-dev = 0.416/0.635/0.921/0.066 >> >> 192.168.1.212 : unicast, xmt/rcv/%loss = 500/500/0%, >> min/avg/max/std-dev = 0.388/0.653/0.863/0.069 >> 192.168.1.212 : multicast, xmt/rcv/%loss = 500/263/47%, >> min/avg/max/std-dev = 0.396/0.670/1.080/0.074 >> >> OK, I am using simple hardware, but this hardware is virtually >> doing >> nothing... >> >> As mentioned on >> https://access.redhat.com/knowledge/sites/default/files/attachments/rhel_..., >> I set the txqueelen to 500, same result? >> >> I 'm still guessing whether this is an oVirt, virtio or Red >> Hat/Centos issue? Problems only happend after some time; that is >> 200 >> mo-pings shows everything is fine. >> >> Anyone? >> >> Winfried >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users