Error 12700 VMM cannot complete host operation while creating Virtual Networks

While creating virtual networking on one of the Hyper-V 2008R2 host

It was giving an error  12700 VMM cannot complete the host operation on <servername> server because of the error

I tried rebooting/removing and reading back to cluster . But then it always throw an error while creating Virtual Network. Because of this I was not even able to create VM on the cluster . It was giving error "Error 20400  1 parallel subtasks failed during execution.

Found MS KB 2486812 which explain how to fix and what is the root cause. Downloaded nvspbind and run it on problematic Hyper-V cluster.

 

And finally I was able to create Virtual Network

Change DataBase location for System Center VMM 2012

I wanted to provide CNAME as a DB connection for SCVMM rather than actual server name. The reason for doing so was to make sure incase of mirrored DB goes down, I can make DNS changes and that can take care of SCVMM rather than making registry or application level changes.There are many ways to do so but one registry hack can also make changes.

"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft System Center Virtual Machine Manager Server\Settings\Sql " and update following changes

Restart System Center service and this will update SCVMM as well.

 

This node is an active node in a failover cluster - Windows 2008R2

When I was trying to add node into existing cluster it throws the error message "The computer is joined to a cluster." I also found that cluster service was not started.

Hence I decided to remove feature  failover cluster but then it throws the message "This server is an active node in a failover cluster. Though this node were not visible under fail over cluster

This seems to issue with stale connections . In order to clear this run PS command clear-clusternode

And finally it will allow to remove failover clustering feature.

 

DDC setup does not showup virtual machine storage?

While performing configuration of Citrix XenDesktop we found that there were no storage resource available to assign for virtual machine manager. Here we are trying to integrate System Center Virtual Machine Manager 2012 with XenDesktop 5.6

So there are few pre-requisite for storage to showup and this need to configured via SCVMM and Hyper-V host. Here we need to insure that for EVERY host placement is defined as show below

 

And for same path which is under placement sharing is enabled

Once this done you can view storage under virtual machine storage.

Source : http://blog.itvce.com/?p=675

How to setup Quorum for fail over cluster for Hyper-V

While configuring quorum for Hyper-V fail over cluster

It gave message that "No quorum witness has been configured for the cluster"

This was because quorum disk which was presented were not formatted . So formatted and assigned the drive letter Q

As soon it was added under cluster manager ->  storage, it was available

Now when I ran cluster configuration again it shown up under storage

Finally this configuration will finish