Walked into this issue when trying to deploy a logical switch from Virtual Machine Manager:
An internal error has occurred trying to contact the 'Cluster1-Node1' server: : .
WinRM: URL: [http://Cluster1-Node1:5985], Verb: [INVOKE], Method: [GetFinalResult], Resource: [http://schemas.microsoft.com/wbem/wsman/1/wmi/root/scvmm/AsyncTask?ID=1001]
Unknown error (0x80078005)
Check that WS-Management service is installed and running on server 'Cluster1-Node1'. For more information use the command "winrm helpmsg hresult". If 'Cluster1-Node1' is a host/library/update server or a PXE server role then ensure that VMM agent is installed and running. Refer to http://support.microsoft.com/kb/2742275 for more details.
After some troubleshooting I found out that one of the NICs that I was adding to the switch had still the “Hyper-V Extensible Virtual Switch” enabled:
Apparently when I removed a virtual switch from the server it did not restore the settings on the NIC.
Make sure that no switch is bound to the NIC, and if not to uncheck the box and try to deploy your logical switch again!
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If you have any questions or feedback, leave a comment or drop me an email.
Darryl van der Peijl