I have restarted "Hyper-V Networking Management Service " but issue still same.

Please help.

Then lets back up.

What did you do that got you here?

Was it working prior?
What have you tried in an attempt to resolve the issue?

I have to say, this is the first time I have seen someone post this error...

Cisco tried to upgrade firmware from that time we are facing this issue, but we have rolled back the firmware.

yes it was working before, I have restarted "Hyper-V Networking Management Service " but issue still same.

Ah.  So the firmware changed.  And that means that the switch is probably trying to deal with that.

Did you reboot the server after the firmware was changed?

(and considering what the firmware change did, I would suggest deleting and creating new virtual switches once you can get in there).

Hi,

I have rolled back firmware now,  i am on same stage, where server was. but getting error unable to create virtual switch.

Please help to create virtual switch in hyper-v, getting enclosed error.