When you Import Hyper-V 2008 and Hyper-V 2012R2 Management Packs on the same Operations Manager Management Group you will get the following warnings from every Hyper-V 2012R2 Server.
This warnings happend because the there are
2 Monitors which are bind to the Class Hyper-V Virtual Network,
3 Monitors which are bind to the Class Hyper-V Virtual Network Adapter
1 Monitor which is bind to the Class Hyper-V Virtual Hard Disk
1 Rule which is bind to the Class Server running Hyper-V 2012
which are also used for the Hyper-V 2012R2 Environment. The big Problem now is that there are some changes at the Hyper-V enventlogs in Hyper-V 2012R2 and the following eventlogs are missing.
What you can do is for example to disable the following Monitors for the “Windows Server 2012 Computer Group”
|1||Hyper-V Virtual Network||Port Connectivity||Monitor|
|2||Hyper-V Virtual Network||Port Disconnectivity||Monitor|
|3||Hyper-V Virtual Network Adapter||Static MAC Address||Monitor|
|4||Hyper-V Virtual Network Adapter||Dynamic MAC Address||Monitor|
|5||Hyper-V Virtual Network Adapter||Mac Address||Monitor|
|6||Hyper-V Virtual Hard Disk||Mounted Drive Read-only||Monitor|
|6||Server running Hyper-V 2012||Hyper-V MPE 2012 Live Migrations Failures||Rule|