[Users] Cluster corosync mulicast issue

[Winfried de Heiden]

Hi all,

I have no idea if it is ovirt related, nevertheless I give it a try. 
Playing around with Red Hat Clustering I created a 3 node cluster.

It seems to works fine, but after changing a couple of things 
/var/log/messages is flooding with warnings like:

Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c 
88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a
Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c 
88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a
Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c 
88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a

It seems multicast related, which all seems fine:

[root at node1 ~]# netstat -g
IPv6/IPv4 Group Memberships
Interface       RefCnt Group
--------------- ------ ---------------------
lo              1      all-systems.mcast.net
eth0            1      239.192.7.246
eth0            1      all-systems.mcast.net
eth1            1      all-systems.mcast.net

Testing with omping works well.

OK, I'm using home hardware, but the 3 nodes are doing virtually 
nothing. It's on one local network, using local storage etc.

Anyone familiar with this problem? That is: after some "heavy" 
multicasting packages seem not to arrive.

It might be an virtio network thing, ovirt...?