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Network adapters disappear from network adapters list and cluster server stops responding

Extended support for SQL Server 2005 ended on April 12, 2016

If you are still running SQL Server 2005, you will no longer receive security updates and technical support. We recommend upgrading to SQL Server 2014 and Azure SQL Database to achieve breakthrough performance, maintain security and compliance, and optimize your data platform infrastructure. Learn more about the options for upgrading from SQL Server 2005 to a supported version here.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
In a cluster environment, network adapters may disappear from the following locations:
  • Device Manager.
  • The Local Area Connection Properties dialog box.
  • The Windows registry.
The virtual server that SQL Server is running on may not function appropriately in the corresponding cluster environment. This results in the following:
  • The memory usage of the computer may be very high.
  • The Network Connection icon disappears from the notification area and from My Network Places.
  • The following error messages may be logged in the Event Viewer:
    Event ID: 1045
    Type: Error
    Source: ClusSvc
    Description: Cluster IP Address resource could not create the required TCP/IP interface.
    Note The following error message is logged when you try to bring a Clustered Internet Protocol (IP) Address online:
    Event ID: 1095
    Type: Error
    Source: ClusSvc
    Description: Microsoft Cluster Server failed to obtain information about the network. Error 2147942405
Some versions of the Intel SNMP Agent (ILansnmp.dll) lock the Windows registry and other resources cannot access the registry. This may cause cluster functioning to fail.

Note ILansnmp.dll is not a Microsoft component.

When the ILansnmp.dll file causes this problem, the IP addresses of network adapters are unbound. This result in communication failure in cluster IP addresses.
To resolve this problem, obtain the latest version of the ILansnmp.dll from the provider.
For additional information about Microsoft SQL Server 2000 virtual server basic setup, maintenance and service pack installation, visit the following Microsoft Web site: For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
327518 The Microsoft support policy for a SQL Server failover cluster

ID Artikel: 811876 - Tinjauan Terakhir: 03/14/2006 23:07:54 - Revisi: 2.1

Microsoft SQL Server 2000 Enterprise Edition, Microsoft Windows 2000 Advanced Server, Microsoft SQL Server 2005 Developer Edition, Microsoft SQL Server 2005 Enterprise Edition, Microsoft SQL Server 2005 Express Edition, Microsoft SQL Server 2005 Standard Edition

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