Setting up a cluster on 5.0

This was an issue with multicast. Seem to be having a problem migrating VMs as well. I can create VMs on both hosts, i can ping between them and ssh between them. But when migrating i get "migration aborted Can't connect to destination address using public key".

I reinstalled both machines, created the cluster, and added the second host to the cluster and all that went just fine. Just to be sure i hadn't messed somethng up. Any idea whats up?