Article ID: 2465160 - Last Review: November 22, 2010 - Revision: 5.0

Add Host or other action fails with (2916) 0x80338126 in System Center Virtual Machine Manager 2008

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Symptoms

Adding a Host to System Center Virtual Machine Manager 2008 (SCVMM 2008) fails with a variation of Error (2916):

Error (2916)
VMM is unable to complete the request. The connection to the agent ServerA.contoso.com was lost.
(The WinRM client cannot complete the operation within the time specified. Check if the machine name is valid and is reachable over the network and firewall exception for Windows Remote Management service is enabled. (0x80338126))

Recommended Action:
Ensure that the WS-Management service and the agent are installed and running and that a firewall is not blocking HTTP traffic. If the error persists; reboot ServerA.contoso.com and then try the operation again.

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Cause

Specific content is being filtered by a non-Windows firewall. The firewall could be software installed on either the SCVMM 2008 Server or the Host that is being added. More likely, there is a hardware appliance firewall on the network between the two communicating servers.
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Resolution

Test multiple communication protocols between the two systems; the SCVMM 2008 Server and Host in this example. Some firewalls can have content filtering enabled despite showing that it is not. Remove all non-Windows software firewalls and bypass all hardware appliance firewalls entirely long enough to perform testing to verify whether or not they are contributing to the problem.

The following tests are examples of protocols that should always succeed. Test both directions always:

  • Ping by DNS name in both directions (NETBIOS and FQDN). The IP address returned must match.
  • Access to '\\ServerA.contoso.com\admin$' from the 'Run' command in both directions. This must succeed.
    • From Server B: \\ServerA.contoso.com\admin$
    • From Server A: \\ServerB.contoso.com\admin$
  • WinRM basic connectivity in both directions. This must succeed. If it does not, execute 'winrm qc' on both servers, accepting all prompts, then test again.
    • Remote NETBIOS test: winrm id -r:remoteserver
    • Remote FQDN test: winrm id -r:remoteserver.contoso.com

WinRM successful reply example:

C:\>winrm id -r:ServerA
IdentifyResponse
    ProtocolVersion = http://schemas.dmtf.org/wbem/wsman/1/wsman.xsd
    ProductVendor = Microsoft Corporation
    ProductVersion = OS: 6.1.7600 SP: 0.0 Stack: 2.0

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More Information

Recently a firewall appliance sold by a major vendor showed content filtering disabled and not licensed to be turned on, yet was still filtering specific content. This was discovered through examination of network traces. Do not assume content, protocols or traffic are not being blocked. Perform tests to verify.

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Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use (http://go.microsoft.com/fwlink/?LinkId=151500) for other considerations.
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APPLIES TO
  • Microsoft System Center Virtual Machine Manager 2008
  • Microsoft System Center Virtual Machine Manager 2008 R2 Workgroup Edition
  • Microsoft System Center Virtual Machine Manager 2008 Workgroup Edition
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Keywords: 
KB2465160
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