„Wenn sich mehrere HA-Cluster im selben Netz befinden müssen die mulitcast-adressen und multicast-ports aller cluster/clustermember unterschiedlich sein.“
http://www.borgmann.tv/pages/startseite/linux-zeug/howto-linux-ha-cluster.php
The multicast addresses are in the range 224.0.0.0 through 239.255.255.255. Address assignments are listed below.
The range of addresses between 224.0.0.0 and 224.0.0.255, inclusive, is reserved for the use of routing protocols and other low-level topology discovery or maintenance protocols, such as gateway discovery and group membership reporting.
http://www.iana.org/assignments/multicast-addresses/multicast-addresses.xml
Links:
http://www.hastexo.com/resources/hints-and-kinks/whats-totem-retransmit-list-all-about-corosync