What is the proper way to simulate a network failure on a RHEL Cluster?

Solution Verified - Updated -

Issue

  • What is the proper way to simulate a network failure on a RHEL Cluster?
  • Is doing an ifdown and ifup a proper way to simulate that the network is down on the heartbeat network for a RHEL cluster node?
  • Why didn't my service group failover when I performed an ifdown on 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 Enterprise Linux Server 7 (with the High Availability Add on)
  • Red Hat Enterprise Linux Server 8 (with the High Availability Add on)

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