> If Multicast does not work, you can try to reconfigure corosync to use UDP > unicast. You can find an example on your PVE node at > /usr/share/doc/corosync-pve/examples/corosync.conf.example.udpu For unicast, see also http://pve.proxmox.com/wiki/Multicast_notes#Use_unicast_instead_of_multicast Martin