Fixing switch port leaks in VMM

hi everyone, it has become apparent that VMM 2008 R2 has switch port leaks when performing checkpointing operations through VMM (either through the PowerShell interface, through Visual Studio Lab Manager, through the self-service portal, or through the VMM Administrator Console) This is a known issue that we will potentially address in an upcoming QFE. For…

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VMM service crashes with System.Runtime.InteropServices.COMException (0x8007200A)

hi everyone, this is a troubleshooting blog post on how to fix and issue with VMM 2012 where the VMM service crashes with System.Runtime.InteropServices.COMException (0x8007200A): The specified directory service attribute or value does not exist. Big thanks to Radhika from the VMM team for compiling this troubleshooting item. Scenarios: This error could happen while adding…

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Resolving certificate name mismatches when managing a Hyper-V host in VMM

This blog post comes courtesy of Todd Logan, a colleague at Microsoft. Use the following steps to resolve a name mismatch error when viewing the remote desktop connection of a VM on a Hyper-V host through VMM (using the Virtual Machine Viewer application). The VMM server in this case is running as a virtual machine….

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Issues with migrating a Virtual Machine from one cluster to another

if you have two Hyper-V failover clusters managed by VMM 2008 R2, it is possible that you can’t migrate over the network (LAN migration) a VM from one of the clusters to the other cluster. This issue will only appear if ALL of the following conditions are met. ·         VM is created using Hyper-V (i.e….

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Recognizing the operating system version of a domain controller for VMM 2008

hi all, this blog post applies to only VMM 2008 (VMM 2008 R2 or a later version of VMM do not exhibit this issue). When you use VMM 2008 to manage a set of computers in Hyper-V, and if the Virtual Machines have a windows operating system installed with the domain controller role, the name…

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Getting the OS name for "Windows 2000" to show up properly in the VMM Administrator Console

if you are managing a Windows 2000 Server Virtual Machine with Hyper-V, you might notice that VMM does not recognize this operating system in the Administrator Console. Even if you manually change the OS name in the Virtual Machine properties, VMM will make it empty on the next refresh of the VM. To get around…

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Removing missing VMs from the VMM Administrator Console

it has come to our attention that there are some customer complaints with regards to missing virtual machines in the administrator console after a cluster failover. Since it is not easy to remove those VMs from the VMM administrator console, Gokcen from our team wrote a script that will allow you to clean those VMs…

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Saving and re-applying the virtual machine metadata in VMM

hi everyone, this week i am going to post a new set of PowerShell scripts that will allow you to save the Virtual Machine metadata in VMM. The saved metadata can be applied later on in the event that you add and remove the host from VMM management. A scenario where this issue comes up…

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Supporting Red Hat for Hyper-V

I am sure many of you have heard of the recent support statements from Windows Hyper-V with regards to Red Hat. (see http://blogs.technet.com/virtualization/archive/2010/02/23/red-hat-enterprise-linux-and-hyper-v.aspx for more details). We have now posted a KB article that shows you how to enable this guest operating system in VMM. http://support.microsoft.com/kb/2022557 has all the details including the database script necessary to enable…

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Virtual Machine Manager and Performance Metrics (CPU counters) - Part 1

Chetan from my team volunteered to write a two part blog post about how VMM gathers the performance information it shows on VM. This article describes the details around the performance metrics that VMM collects and how to make sense of perf information that is displayed in VMM.    VMM uses a periodically running performance…

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