How do heartbeat communication and heartbeat failure detection work in Red Hat Cluster Suite?

Solution Unverified - Updated -

Issue

  • I would like more information on how the High Availability cluster Add-On detects failure of a node on the heartbeat network.
  • Why does multicast traffic appear while doing tcpdump in cluster nodes?

Environment

  • Red Hat Enterprise Linux Server 5 (with the High Availability or Resilient Storage Add Ons)
  • Red Hat Enterprise Linux Server 6 (with the High Availability or Resilient Storage Add Ons)

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