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Is there per-connection throttling of Internet transfer speed? (From both host and guest)

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Hi friends,

I have a strange Hyper-V issue.  (It came up during attempts at diagnosing lousy DNS forwarder performance - now I want to understand and preferrably fix the below, first.)

My home lab has 40 Mbps fiber to the Internet, and 2 server PCs: Windows Hyper-V Server 2012 R2 and Windows Server 2012 R2 Standard (also with Hyper-V role).  For this discussion, they are up-to-date and behave identically.

I've tried Speedtest and testmy.net, results are the same.

When tested from either a Hyper-V host or a VM, each connection maxes at only ~3.5 Mbps.  I can start many connections in parallel (I've had max 5 running) - each maxes at ~3.5 Mbpps!  It doesn't matter if the connections are from several processes on the same VM, or from a mix of hosts and VMs.

So it seems neither host nor VM is throttled to 1/10 of the fiber capacity - it's as if each connection is throttledindividually!

Transfers inside the LAN (e.g. from my NAS to a server or VM) does not have this cap applied - then I get ~800 Mbps.

Any other client (Android phone, Windows 10) on my LAN or WLAN is able to max out the fiber at ~40 Mbps.

Obviously, I'd blame my cheap Netgear RP614v4 router if it wasn't for that last fact.

I've made sure VMQ and offloading are disabled (my NICs are basic Intel), no teaming, no QoS policies.

I can't make sense of it - does this ring anybody's bells?

Best regards,

Robert



Unable to create a VM from Disk2VHD image - 2008 R2

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Hi,

I have created a VHD using Disk2VHD tool and it is unable to boot. I have attached the VHD to new virtual machine and VM is keep getting the start-up repair wizard. When the VM booted for first time it displays a error mentioning that C:\Windows is corrupted and need to run chkdsk. 

I have run chkdsk /f option and it has corrected few errors. but the issue remains as it is. Further, I have run following commands from command prompt when the VM is booted from Windows server 2008 R2 DVD.

bootrec/fixmbr

bootrec/fixboot

bootrec/scanos - total identified windows installations: 0

bootrec/rebuildbcd - total identified windows installations: 0

nothing worked for me and I tried using hyper-v 2.0 and 3.0 as well. same issue appear every time.

another thing I have noticed is that the physical servers doesn't show a "System Reserved" partition when creating the VHD image. So, the VHD has only the C: partition. 

Could anyone give me a solution for this...??

Regards,

Thisaru Perera.

Multiple VM communicate to each other

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I have a server with 3 NIC cards  The physical machine is using NIC 1 which is behind a router using NAT so the world has no access to the physical server it is only used as a file server for a local private network behind the router.  There are 2 VMs both running Windows Server 2012 R2 just like the physical machine.  One VM is housing a databsse and connected to NIC 2 and the other VM is housing a web server and connected to NIC 3.  NIC 2 and NIC 3 are not going thru a router but strait to the internet with the outside world IP address as it's only address no NAT.

Both the database VM and the Web Server VM need to interact with people on the Internet.  Also the Web server VM needs to put files in a specific directory on the database server and it alos needs to get info from and modify and insert data to the database. The database has no need to interact with either the physical machine on NIC 1 nor to initiate anything with the web server VM on NIC 3 (Of course it must return results to inquiries initiated by the Web program on VM NIC 3)

How can I set up the NICs so that Web server can directly use the Database server?

Do I attach 2 virtual switches to each VM?  Do I configure 1 switch using NIC 1 as shared and one non-shared switch for the internet for each VM?

Is below correct?

Database VM = Vswitch 1 using NIC 1 shared + Vswitch 2 using NIC 2 not shared

Web Server VM = Vswitch 1 using NIC 1 shared + Vswitch 3 using NIC 3 not shared

Would the above config allow the Web server to access the database server on a common network so that the web server could use windows authentication.  OR would I still have to use SQL Server user authentication?  

I am not using active directory at this time so there will be no common logon's each VM OS will be just a single administrator user each having different passwords on each VM

If my proposed configuration will not work please explain the simplest way to achieve my goal.

Hyper-V 2012 R2 VM Settings very slow loading

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Hi All,

I have a environment of Hyper-v 2012 R2 Failover Cluster and what i am experiencing is whenever i go to settings of any VM it takes ages to load it. Tried couple of workarounds from google but no luck till yet. Any Suggestions?

P.S. Its a production Hyper-V host so no restarts or shutdown solutions.

Your generous help would save a lot of time for me.

AzMan replacement for Hyper-V on Windows 2012 Server

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The following articles on technet say, that AzMan is deprecated in Windows Server 2012

First article. What's new in Hyper-V. http://technet.microsoft.com/en-us/library/hh831410.aspx

Second article. Things that are removed or deprecated in Windows Server 2012. http://technet.microsoft.com/en-us/library/hh831568.aspx

Both articles refer to some mythycal new management tools. The question is: where do I get these tools and how should I manage access to the virtual machines now? Will appreciate any information about this topic.

Data recover from snapshot file - AVHDX

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Hello All

I have a problem in that my Hyper-V server crashed corrupting one of my client VM's. Luckily I had done an export recently and was able to get this back online quickly. My problem is data recovery. I'd like to get some data off the VM client that didn't boot but it appears to have snapshots (mixture of VHDX and AVHDX files). Im not aware of taking any and none were and are shown in the snapshot area of the Hyper_v manager.

Is there any way I can mount these files (at present I can't right click and mount as I can with a normal VHDX) to get the data?

Also I'd like to be rid of the AVHDX file and revert to the basic VHDX but how can I when the system does not show it has any snapshots??

Hope that makes sense!

thanks!!!

transfer rates terrible....

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I have a HP Gen9 server running Win12R2 server and is being used a a Hyper-V Host server. I created multiple VMs running Win12R2 as well, one being a standard File Server.

The topology is as follows:

Host-->Intel SFP+ adapter -->Cisco Catalyst SW (SFP+ connection, with LACP enabled) --> SFP+ connection --> Enterprise NAS (setup for iSCSI)

The guest VM that is on the HOST is connecting the files stored on the NAS as a iSCSI connected logical disk.

The host has setup the SFP+ connection as the main virtual adapter for the guest VMs to use.

SF-iOV has been enabled.

VMQ has been enabled.

But we are getting slow transfer rates, even on the 10Gb SFP+ connection.

Any thoughts, on what else i can try?

failure configuring windows features reverting changes do not turn off your computer 2K8 R2 Ent x64 bit

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HI,

I am using lenovo blade server (compute node x240).with the operating system win 2k8 R2 Enterprise X64 bit OS.When i tried to install Hyper-v Role in that server it won't install that.

and prompted to restart after the restart its showing failure configuring windows features reverting changes. do not turn off your computer.

I tried to install to install ADDS in the same server but it's also won't install.Since i have only File server in that server but have a lot of dependency with server. i have installed backup EXEC in that server.

Can you please help me out about this issue.




Windows Server Backup causes Hyper VM to run from AVHD file

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Hi

We have a Windows server 2012 R2 Standard server which is a host to a Virtual machine. We have configured Windows Server Backup for the host. We have noticed that when the VH server is being backed up snapshots are taken of the VM's, once the backup is complete the merge process begins, unfortunately the merge process is not always carried out and we have to restart the VM for it begin the merge process as they are running from an AVHD rather than VHD. Once the merge process is complete the VM is running from a VHD file as normal.

How do we avoid this from happening or occurring.

Kind Regards

Ashwin

KB2920189 fails to install on generation 2 vm's

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It looks like there is a problem with the KB2920189 update.

When trying to install it via Windows Update on some servers, they all fails the installation of this update - they are all running 2012 R2 inside generation 2 Hyper-V machines.

Has this update been tested with the UEFI implementation inside Hyper-V?

Problem with backup Hyper-V VM's.

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Hi,

please help, I don't know what to do. I tried everything from another forums, but with no results.

Below is described my server.

SERVER:
Host - windows server 2012 R2 std
VM1 - DC windows server 2012 R2 std
VM2 - SQL windows server 2012 R2 std
When trying to make backup with windows server backup, I get the message: Completed with warnings.
On both VM's is installed Integration Services.

Error message from backup:
Writer Failures
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
Instance Id: {C0DE739E-E7C3-4D76-95B0-87B5CF682F0D}
Writer Name: Microsoft Hyper-V VSS Writer
Writer State: 0
Failure Result: 81000112
Application Result: 0
Application Message: (null)
   Component: 3B0C7323-C11A-4EE5-B997-05FCC63EF813
   Logical Path:
   Component Result: 8100010D
   Component Message: Component reports path on network share which cannot be snapshotted. (0x8100010D)
   Component: 993CF905-E399-4C4C-B3D7-5CFB617429F4
   Logical Path:
   Component Result: 8100010D
   Component Message: Component reports path on network share which cannot be snapshotted. (0x8100010D)
*-----------------------------*


Application backup
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
   Component: 3B0C7323-C11A-4EE5-B997-05FCC63EF813
   Caption     : Online\GDC01
   Logical Path:
   Error           : 80780175
   Error Message   : Component was skipped from volume shadow copy.

   Detailed Error  : 8100010D
   Detailed Error Message : Component reports path on network share which cannot be snapshotted.



Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
   Component: 993CF905-E399-4C4C-B3D7-5CFB617429F4
   Caption     : Online\GSQL01
   Logical Path:
   Error           : 80780175
   Error Message   : Component was skipped from volume shadow copy.

   Detailed Error  : 8100010D
   Detailed Error Message : Component reports path on network share which cannot be snapshotted.



*-----------------------------*

VM's performance report for Windows 2012 R2 Hyper-V server.

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Hi there,

I have been asked to create graphical performance report of 80-90 VM’s running on Windows 2012 R2 Hyper-V server. This report will be used for capacity planning, to investigate which VM’s and at what time a day are under or over utilized, etc.  

Unfortunately we don’t have SCOM or any other third party monitoring and reporting apps to produce those types of reports.

After a bit of Googling around I have found few excellent “point in time” Hyper-V Reporting Script. Unfortunately that is not what I after. I need PowerShell script (or something else) which will collect CPU/memory utilization, disk IOPS, network in/out of every VM’s running on Hyper-V server every 5-10 mins for a day or more.

Thanks in advance. 

Physical (tp-link, Cisco, HP, etc) switch in Hyper-V

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Hello,

I'm working on trying to make a virtual configuration system. Now i have my gateway en PC virtualised. My next step is that i want a switch virtual. But not the one in Hyper-v but i want to be able to configure a HP or TP-link switch virtual. 

This so i can, after configuring, download the config file and load it on the switch on the client location. So i need to be able to create any switch i want, and be able to use the GUI to configure it.

Is this even possible and if so, how do i do it? I've been looking on the web but can't find any manual or hint for it. The only software i have for the switch (this moment a TP-Link TL-SG3216) is the firmware .bin file.

Hope someone can help me.

With reguards,

Gidion

Hyper-v Blue Dump error (WppRecorder.sys )

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HI Everyone,

  I have installed Microsoft Hyper-v 2012 R2 OS on Dell R730 with following following Simple setting.

c: 100 GB

d:- 2.2 TB

but when i create guest machine (VM) on server. it gave me BLUE DUMP Error ( some time while creating Virtual Switch and Sometime after restart Host Server .I logged call in dell they said no hardware issue.

WppRecorder.sys Blue Screen Errors (BSOD)

Is there any OS issue or any configuration setting Messing from me

Kindly Help.

error in cluster Event - the error code is 0x57(the parameter is incorrect)

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error in cluster Event - the error code is 0x57(the parameter is incorrect)*** , please use the get-clusterResource ***

When i used the Get-CluterResource, it show me the VM that i created and fail to end up in Failover Cluster due to insufficient Resource/Capactity.

and it show 

NAME state**

PC 18offline(locked)PC2

I try to remove-clusterResource -name (PC 18) and it show me error.

How do i remove it to stop the cluster event from flagging?


Vswitch and Wlan

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Hello experts;

Currently I use Hyper-V on Windows 10, 

So i can bind my WLAN  Adapter to a virtual Switch

Can you confirm this information:

NOTE HYPER-V AND WIRELESS NETWORKING
Virtual switches on a Hyper-V host cannot be connected to a wireless network adapter on the host system.


HV Replica warning

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Dears,

HV Replica gives this warning: more than 20% of replication cycles have been missed for virtual machine

Does this means I have to delete and re-enable replica every time I get this error coz I have lost data and VM is now missing information?

THanks

Session usage reports

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Im trying to figure out how often remote desktops are being used on my hyper-v hosts.  This would be something like how many sessions there where, how long the sessions were, and what collection they were in. Im currently using Unidesk to create desktops in Hyper-v and it doesnt have this kind of reporting.  Running get-rdusersession on the broker gives me a list of all the current sessions but that doesnt give me past sessions. I thought I might be able to parse some of the terminal services logs but I cant find any place on either the broker or the hyper-v host that logs how long the sessions were or when they were closed.  Does anyone know how to get this information?  
     

USB redirect

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Hi.

I can't understand: Hyper-v Server 2012 r2 now have redirect USB or not?

I not mean RemoteFX USB or USB flash drive and RDP, but usb redirect for usb token, UPS and so on.

Thanks.


Running Virtual Machines on Hyper-V (Any Version Above 2008 R2) Causes System To Randomly Crash

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Basically I have a HP 500-164 desktop that serves as my hyper-v host for testing. It worked fine on Windows Server 2008 R2 but after upgrading to 2012 R2 it will crash about 15-20 minutes after starting a vm or vms up. However if no vms are running the system is fine and works as normal. I even ran a 48 hour stress test with no vms running but the hyper-v console open and it did perfectly fine. I really like the newer hyper-v software and since I am now running windows 10 on my laptop I am no longer able to manage it without going through an rdp session or powershell. I am open to any new options formatting / reinstalling what ever it takes to get the system working again.

Thanks In Advance

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