Can't connect to one Hyper-V server using Hyper-V manager, works with the other server though

December 10, 2015, 3:42 am

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This is a truly weird one, which I think I've narrowed down to the specific machine.

I have two HyperV servers running Windows Server 2012 R2, both hosting a few VMs and doing replication between them. When I sign into Hyper-V Manager on my desktop (Windows 10) machine, I can connect to one server but not the other.

If I remote desktop to one of the servers, I can use Hyper-V Manager on the server to connect to the other just fine. This works both ways, ie. both servers can see and control each other's VMs using Hyper-V Manager.

I am logging in with the same user on all machines, so it's not a specific user permissioning issue that I can tell.

I am also able to log in using a different Windows 10 desktop and my own username, so I don't think it's a firewall issue either.

The specific error is "You do not have the required permission to complete this task. Contact the administrator of the authorization policy for the computer 'XXXX'".

Bizarrely, from the same desktop machine I can use Server Manager to view and admin the server that won't let me connect to the VMs. I can even start/stop services using Server Manager, so I've got lots of permissions!

Any idea where to look? Is there a ban list for specific machines that a server holds for example? I've never seen something this odd before.

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DNS works on one network but not another

December 11, 2015, 2:59 am

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Hi All,

I have a server 2012 guest that runs fine on my host PC (Windows 8.1)

When I connect to the wifi at work DNS work find and I can ping/browse any web site from the client.

When connected at home I cannot get to the internet

Any clues?

Thanks in advance

Joe

Show Virtual Machine (HV) Mac address on phisical switch mac table

December 11, 2015, 2:42 am

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Hi to all,

I have a little problem with HyperV conf, i have some phisical PCs connected to the same phisical switch, and one of this PC 2012r2 have the role of hyperV. In HV environment I have different VM connected on virtual switch in "internal" way so all the machine are on the same subnet of my phisical LAN.

the problem is that if I show all the mac addresses on the phisical switch I'm not able to see the MAC of the virtual machine, It seems that the virtual switch does not forward the VM Mac address to the phisical swicth.

Is there a way to have all MAC addresses available on the phisical switch mac table?

How to Get a Virtual Machine has been deleted

December 11, 2015, 1:27 am

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I have Hyper-V 2012

and by mistake someone delete the virtual machine completely from the SAN Storage

please help me to get the VHDX file from this machine

How to delete a VLAN on a Hyper V?

December 10, 2015, 9:34 am

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I mistakenly put on a VLAN interface 0 interface of my Hyper V server instead of 1. Therefore the mangement no longer works.

I made the change from the Hyper V Manager master server, I only have access to the slave machine with a console.

How can I delete the VLAN and restore my old configuration?

HyperV, Failover Cluster and Cluster Shared Volume: where to create the VMs ?

December 10, 2015, 4:59 pm

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Hello,

So we have the following configuration:

Hyper V running on Windows Server 2012 R2.

Then we created a Failover Cluster and added 2 Cluster Shared Volume. Everything looks ok.

My question:

I can create a VM directly on the Hyper-V manager on one of the node, using the CSV disk as storage. I won't be seen on the Failover Cluster though.

If I create multiple VMs on each local hyper-v nodes like that (so sharing same CSV, same LUN on SAN), how is the coordinator node going to be able to handle the metadata traffic and redirected i/o since none of the VMs appear in the Failover Cluster manager ?

I mean can we use safely the CSV as storage for several VMs that are not part of the Failover Cluster ?

I was thinking the Failover Cluster was mandatory in order to manage multiple VMs on the same LUN.

Looking forward to your feedback.

Thanks You

CC

Hyper-V - Only 8 VM are able to get network connectivity

December 11, 2015, 10:28 am

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Hi,

So this one is, for me, quite hilarious. Added a new host recently to my hyper-v cluster. That host at the moment has 9 VMs. However only 8 of them are actually able to send to the network. If for instance, I shutdown one of the 8 that have connectivity and reboot the one that did not. It gets connectivity. If I restart the one that had connectivity, it does not get the connectivity back.

So, where the heck is that parameter :) ?

Thanks

Olivier

Error occur while adding external adapter

December 11, 2015, 9:05 pm

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Hello all

I am adding one adapter in my hyper V for getting internet connection in my VM .

But while adding the adapter when I put the adapter in internet network following error will come although when I add it to the internal connection it will created successfully.

Thankyou

Sunny

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after exporting check points how to import them again ?!

November 29, 2015, 5:37 am

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Hi All

i have exported my checkpoints ... , and deleted them... now how to import them ?

regards

Can't open more than 1 machine?

December 12, 2015, 10:30 am

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Well, i made 2 virtual machines into Hyper-v and for some reason i can only open 1 at a time. if i try to open more than 1, it shows up this error.

http://i.imgur.com/PNLt6zZ.png

I'm not sure why this shows up, but my dedicated server has enough resources to
keep 2 machines running.
Can someone help me with this please?

Screen scale too small when viewing Hyper-V guest from Hyper-V Manager

December 13, 2015, 12:52 pm

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I have two Hyper-V servers set up, one on Server 2008 and one on Server 2012.  When I view guest VMs from the Hyper-V Manager on Server 2008, they are quite easy to view, but on Server 2012 it seems to scale down the screen making everything small and fuzzy. It looks similar to using "screen scaling" with remote viewing/support products.  Are there settings somewhere to set it to display in real size instead of scaling it down?  See the attached screenshots.  Note that the VM in both screenshots is set for 800X600, but one is scaled down to be much smaller.  In the following shots, compare the font sizes of text on the VM compared to the Hyper-V Manager

On Server 2012

ON server 2008:

Hyperv 2012 r2 how to setup management workstation and internal/external V switches?

December 13, 2015, 3:11 pm

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Hi Everyone,

I have always deployed Hyper-V 2012 R2 in the past just using the external Virtual Switch, but I believe it is not the most efficient and secure way to do it.

Because I have always dealt with small businesses I have always worked with a single host machine, no cluster.

Now I would like to setup my Hyper-V manager on the management workstation to use a separate internal v-switch rather than using the external v-switch.

Also I would like to setup VMs using the internal v-switch, but I am having problems trying to understand how I would route in/out to the internet using a single host physical network card or a host NIC team.

I don't want my VMs to see the Hypervisor machine. In other words when users click network on their file explorer, they should not be able to see the hypervisor network name.

I would also appreciate some input on how to subdivide a small network using 2 o 3  of vlans and knowing how to use a VLAN ID.

Thanks

Best regards

alfred56

Communication between 2 Virtual Private Switches

December 10, 2015, 1:22 am

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Dear Hyper V Expert,

May I know whether is it possible for 2 Virtual Private Switches in to communicate to each other? I am trying to simulate the environment whereby HQ is connecting to remote sites, so I will be assigning 2 different subnets and to check the replications whether can work. The reason why I am using private switch is because I am trying to avoid the communication from the test environment to accidentally access the production environment. So, I think the safest is to use virtual private switches and connect those VMs to those switches.

Please help to advise.

Thanks.

Regards,

H

Convert existing Hyper V host and two VMs to VM for rescue purposes

December 13, 2015, 5:59 pm

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I have an existing Server 2012 host with two Hyper V VMs. The virtual RAID is failing and I've been asked to reset the RAID and reinstall the server via an image. Unfortunately I have been unable to get a reliable backup with my Barracuda backup device, Windows Backup, even Acronis TrueImage. All of these products seem to be having problems reading the disk. 

The next thought was to convert the host and the two VMs to another VM on another server.  In other words, convert the server 2013 host to a VM - as well as the existing VMs and put them on a completely NEW host on new hardware so the old hardware RAID can be reconfigured and reinstalled.  Is it possible to run a DC host and two VMs in virtual mode on a new host?  I hope this makes sense.

Thanks! 

Hyper-V VM Generation 2 - How to boot from .ISO

November 8, 2013, 12:31 am

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Hi guys, 

Server OS: Windows Server 2012 R2

I have a VM Gen2 with following settings: 

I can boot fine from the same .iso from a Gen1 VM so the .iso is bootable. 

I know that the Gen2 VM uses SCSI instead of IDE, but I have no clue regarding how to boot from the .iso..

Any ideas?

Thanks in advance!

Best regards,

Kenny

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Live and quick migration fails between two nodes

December 13, 2015, 4:07 am

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Hi,

Have a failover cluster consists of 7 nodes.

First 4 nodes are pretty old and have the Xeon E5345; the 5th node has Xeon E5620; the 6th one has Xeon 5649; the 7th one has E2630 v2.

All VM in cluster are NOT configured for live migration between servers with different processors; however, the live nigration between 5 and 6 occurs successfully.

The live and even quick migration between 5th and 7th or 6th and 7th fails because different processors, as event log says; however, SOMETIMES live migration between 7th and 5/6th nodes completes successfully; I noticed that was immediately after HOST7 was patched and rebooted - I have manually live-migrated the VM (disabled different processor support, of course) from HOST 6 ot HOST7, and than from HOST7 to HOST6. How can I explain this behaviour? Is this a configuration issue? All the nodes are fully patched in Thursday.

Hyper-V Networking Issues Win10 Build 10576

November 3, 2015, 7:22 am

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I've been asked to move this topic here from the Windows Insiders forum HERE

After performing an in-place upgrade from Win8.1 Pro to the current Insider build I am having issues with the networking (both PC and Hyper-V switch management).

After the upgrade I had initially no networking enabled:

Both Wired and Wireless adapter settings, while still enabled:



This was the case for MOST of the network devices.

After a good amount of attempts I was able to get both Ethernet and Wireless connections finally working.  However, I still have issues with the VM's connectivity.

Also, I am now unable to delete any Hyper-V Network switch that was created while in Win8.1.  Each time I try to delete the switch I generate the following error:



Does someone please give me a starting point to resolve this error.  Otherwise, my VM's will not have connectivity.

Thanks.

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Gus

Windows 2012 R2 Hyper-V replica

December 14, 2015, 12:47 am

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Hi.

I have a Windows 2012 R2 server running Hyper-V role.

There are two VMs running, each with MS SQL 2012 STD, hope someone can help me on this

The MS SQL 2012 are configured in Simple Recovery Model. No Logs.

1. Does Hyper-V Support MS SQL 2012 running on VM? 

How about MS SQL 2008 on a VM or MS SQL 2008 R2 on a VM ?

2. Can I replicate the VM with MS SQL using simple recovery model  to a second server? Will I encounter any issues?

3. Can I replicate the VM with MS SQL using full recovery model (with transaction logs)  to a second server? Will I encounter any issues?

4. I've properly sized my servers base on Dell's DPACK tool, how much buffer space should I add for Hyper-V replication engine?

Thanks,

Paul

Hyper-V VM failed to start - General access denied errror

March 31, 2008, 4:02 am

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HI,

 

When i'm trying start my newly created virtual machine  I've got error:

 

VMMS Account does not have sufficient privilege to open attachment ".....\SRVVirt.vhd"

 

I am logged in as administrator, Services ara running with following accounts :

 

Hyper-V Image Management Service - Network Service

Hyper-V Networking Management Service - Local System

Hyper-V Virtual machine managemet - Local System

 

Operating system is clear installation of Windows Server Standard 2008 RTM with Hyper-V

 

Installed roles :

 

Application server

File Services

Hyper-V

Web Server

 

any suggestions on how to overcome this issue and get the hypervisor running would be greatly appreciated.

thanks.

 

Radek

 

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Failed to add device VHD. User account deos not have permission to open attachment

December 14, 2015, 8:15 am

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Hi, I would like to move our VHD to NAS server. I successfully copy the VHD to NAS. And I tried to point the VHD to the NAS and it doesn't work. could you please help me out on this?

I am getting an error

"Failed to add device 'vhd'.

user account does not have permission to open the attachment.

\\N8800pro\'location.vhd'. error: 'general access denied error'.

The attempt to get information for attachment \\N8800pro\'location.vhd' failed.

Account does not have permission to open attachment

blah blah blah....