We have lot of NVGRE gateway clusters in our environment - currently 15 with 50 networks on each.
In VMM job "Update the Hyper-V Network Virtualization Policy" always ends with error like this:
Warning (50074)
Policy refresh failed with error: nvgrevmcluster10 Execution of Microsoft.SystemCenter.NetworkService::UpdateCustomerAddressRecord on the configuration provider 4ee559f1-f479-480c-9458-d14b8b1c1779 failed. Detailed exception: Microsoft.VirtualManager.Utils.CarmineException: Policy refresh failed with error: The HyperV network virtualization policy update failed on gateway host (nvgrehost1.domain). DetailedErrorMessage (The WS-Management service cannot complete the operation within the time specified in OperationTimeout.).
If the error repeats and the server is responding, adjust GatewayPolicyUpdateTimeout registry value and try the operation again.
I noticed that "nvgrehost1.domain" points to currently passive host, but not sure is it always like this. But I'm sure that any failed job in VMM is abnormal :)
I can't find reasons and misconfigurations that can cause this error. Any suggestions?