use bind_addr in in cluster-service.xml
(search this forum for bind_addr)
thank you for your hint. I tried to use the bind_addr attribute in the UDP configuration of cluster-service.xml and put it to the internal ip that should be used between the cluster nodes.
the effect seems to be, that i can connect to the server from the client (with the bind_addr that is set via the --host command parameter), but the server instances are not able to communicate to each other.
Is this a configuration error of my nodes (missing routes, ...) or have I misunderstood you?