CrossSubnetDelay with multi-site DAGs

Posted: March 21, 2012 in Exchange 2010, MBX
Tags: , , , , , , , ,

If you run a multi-site DAG over subnets, it could happen, that you have anomalous database switchovers within your DAG. In the event log is triggered, that the FailoverCluster service has lost its heartbeat.

This happens because of the WAN connections latency. You could avoid this behaviour with the cluster.exe command:

cluster /prop SameSubnetDelay=2000:DWORD
cluster /prop CrossSubnetDelay=4000:DWORD
cluster /prop CrossSubnetThreshold=10:DWORD
cluster /prop SameSubnetThreshold=10:DWORD

Read this TechNet article for futher details.



  1. Dennis says:

    gut zu wissen!! Dein Blog macht sich echt gut. Grüße, Dennis

  2. stephanverstegen says:

    Danke 😉

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