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ITsVISTA KB-Link: KB2582281

Slow failover operation if no router exists between the cluster and an application server

Consider the following scenario:

  • You configure a Windows failover cluster to host some network-related resources.
  • You start an application or service on a computer that is running Windows Server 2008 R2, Windows 7, Windows Server 2008, or Windows Vista and that you configure as an application server. The application or service connects to the network-related resources.
  • No router exists between the failover cluster and the application server.
  • The Cluster service performs a failover operation.

In this scenario, the Cluster service fails over the network-related resources slowly.

Note: This issue does not occur if a router exists between the failover cluster and the application server.

For example, consider the following scenario:

  • You configure a Windows Server 2008 R2 failover cluster to host an instance of Microsoft SQL Server.
  • You configure an application server and then directly connect the cluster and application server. No router exists between the cluster and the application server.
  • The Cluster service performs a failover operation.

In this scenario, the Cluster service requires 9 seconds to fail over the SQL Server resources. However, the Cluster service requires only 3 seconds if a router exists between the cluster and the application server.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2582281.

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