How does cluster select the heartbeat interface?

Solution Unverified - Updated -

Issue

  • My cluster nodes are not communicating over the correct interface.
  • Why does one cluster node not join the cluster?
  • How does cluster select the heartbeat interface?
  • What should I name my cluster nodes?
  • How does cluster match a node name with the heartbeat interface?

Environment

  • Red Hat Enterprise Linux Server 5 (with the High Availability Add on)
  • Red Hat Enterprise Linux Server 6 (with the High Availability Add on)
  • Red Hat Cluster Suite

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