A. With Windows Server 2008 and above, you can configure each of the various settings related to latency of heartbeat responses and number of missed messages before a location is considered unavailable. The key values you want to tune would be:

  • SameSubnetDelay—Frequency heartbeats are sent. Default is one second.
  • SameSubnetThreshold—Missed heartbeats before an interface is considered down. Default is five heartbeats.
  • CrossSubnetDelay—Frequency heartbeats are sent to nodes on dissimilar subnets. Default is one second.
  • CrossSubnetThreshold—Missed heartbeats before an interface is considered down to nodes on dissimilar subnets. Default is five heartbeats.

You can configure these with the cluster.exe command line interface and the Set-Cluster PowerShell cmdlet.

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