Multiple GUEST NICs for packet analysis project

July 30, 2012, 4:23 pm

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Hi All,

I have created a GUEST VM (Windows Server 2008 Std) under Windows 2008 Std Host.  My Server has 2 network cards and up until this point I have only been using one of the cards.

I set up port mirroring to the port that the Server's second card is attached to.  I created a VM adapter for the 2nd card and assigned it to my Windows 2008 Std Guest VM.

With port mirroring active I cannot get to the internet with the Guest machine. I would like to either add a second adapter or create a VM adapter that would allow the VM to access both the main NIC for internet access and the 2nd NIC for packet capture.  Is this possible in Hyper-V?  Can someone explain the steps?

Thank you,

Paul

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memory frequency

July 30, 2012, 8:28 am

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question... i am very curious how important the memory frequency really is for a large hyper-v host? eg. running 192gb of memory at 1033mhz compared to 240gb at 800mhz what the pros, cons, will it be a bottleneck?

After Rollback VMs to Snapshots, Some machines Shows Error "failed to modify device 'Microsoft Synthetic Ethernet Port'"

July 30, 2012, 11:45 pm

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Dears,

I have more than 100 machines which are configured for rollback when they log off, almost everyday I have this issue with one VM minimum. After restoring to the checkpoint the VM wont start with the following error on VMM:

VMM cannot complete the Hyper-V operation on the main-vdi5.fastlink.com.jo server because of the error: '<VM Name>' failed to modify device 'Microsoft Synthetic Ethernet Port'. (Virtual machine ID *******-****-****-****-**********) 
 (Unknown error (0x8020)) 

When I looked in the Hyper-V, in the settings it shows that the network adapter selected is "Configuration Error".

Is there anyone that can help me identify where's the error exactly? Note that all the machines are rolling back but only one machine in a day randomly shows this error.

Integration Services not working correctly

July 2, 2008, 6:42 am

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Hi all - I have an odd issue where my Integration Services are not working inside my guests - the SCSI and network are not being detected even after installation of the integration services component.

I have a server that i just installed the RTM of Hyper-V on.  I migrated my 2008 RTM virtual machines from Virtual Server 2005 to the Hyper-V server - but wasn't able to uninstall the VMAdditions before moving them.  So, I created the new guests on the Hyper-V box, attached the VHDs, booted the guests, and uninstalled the VMAdditions from withing the Hyper-V environment instead.  Then after that was done, and the guest was rebooted I installed the Integration Services.  After another reboot, the SCSI, network, and VMBus still aren't detected.  I've tried to reinstall the integration services in the guest OS, but still no luck.

Anyone having the same issue, or any suggestions on how I can fix this issue?


Thanks,

Scott

How do you upgrade from 2008 r2 cluster to 2012 cluster?

August 1, 2012, 3:51 am

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I have two nodes in my cluster. Can I just break the cluster, install a fresh 2012 operating system, on both nodes, setup a new cluster and then just import the VMs from the CSVs? 

Slow VM's...iscsi or network problem?

July 19, 2012, 10:18 am

≫ Next: can hyper-v server 2008 r2 crash a network?

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Hi all,

I've recently created a failover cluster with 2x DL360p G8's connected to an HP p2000 iscsi SAN. I've created a couple of VM but they are very slow, 10 minutes to boot up, and very slow at performing any functions. I'm using an unmanaged switch for the moment until the managed arrives, but I'm not sure if this is where my issue lies. Each node has 4 built in broadcom nics, I've teamed 2 for client access and configured the remaining two for iscsi. I've run all the global chimney commands, the bios is configured for maximum power, the parent OS is configured for max power instead of the default "balanced", the iscsi nics are not set for dns registration, I've removed the client for MS and printing, unchecked ipv6. As far as testing goes, I tore down the mpio and iscsi and just created one connection from each server to the SAN, I also removed one connection from each client access team, just in case the unmanaged switch was having issues with mac addresses on different ports. I've tried a few tests where I copy from the "owner" node of the CSV to the SAN, I copied a 12GB file from the node direct to the CSV, most times I get around 500meg copy throughput but on the odd occasion I get 15 meg or so. The VM's are always slow, it's not a case of sometimes they seem fine, their shutdown time is fine though. There are no errors in either the parent or the child logs, the hosts startup very fast. If I open the task manager on host at boot up only the iscsi lan shows activity but it's only around a 1% or so...obviously the client access and iscsi lan are on different subnets however I understand that on an unmanaged switch they're still sharing the same layer2 domain but I'm not sure if this would interfere, I also tried connecting the iscsi cables to a small 8 port switch I have to seperate them but still exactly the same result. The VM's are built with fixed disks, the SAN is raid5 with one volume spanning 5 10k disks, one CSV, I've created three other clusters with the same type storage but different servers and switches but I've never had an issue like this....anyone with any ideas please?

I've already run this, http://support.microsoft.com/kb/2532917 with no affect. Servers are on the latest firmware and the hosts have all their updates, validation passed fine.

can hyper-v server 2008 r2 crash a network?

July 31, 2012, 1:20 pm

≫ Next: Eventlog 12140 vmguest.iso is "corrupt" and "unreadable"

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Here's the scenario

Custom Server:

Dual 16-core AMD Opteron processors

Asus Server MB

132GB RAM

8TB Hard drive in RAID 50 (DATA)

512GB Hard drive in RAID 10 (OS)

2 onboard Intel server NIC

1 added Broadcom server NIC

1 added dual-port Intel NIC

1 onboard remote management NIC

Host OS is Hyper-V Server 2008 R2. 4 VM - SBS 2011, 2 Server 2008 R2, Server 2008 web edition.   Each VM has a dedicated NIC and IP.  All NIC's tie into a 24 port Netgear layer 3 switch.  This switch ties into a 3com 48 port layer 2 switch and then to a Netgear 48 Port layer 3 switch.  Most of the cable between switches and workstations is CAT3, but the cable from the server to the switch is CATt5e.

Here is the problem: The network crashes. When I see the crashes, my system logs on the Host OS fill up with virtual network errors.  The switches flip out and cannot pass traffic. In past breaks, the virtual network was broken and had to be rebuilt. Currently, the network breaks without notice and is taking longer to fix.  When the network goes down, the Server is up, but VM cannot ping between.  Physically shutting off the server and pulling the power cord does not resolve the issue.  It takes all switches to be turned off for 5 minutes and to wait before the network comes back up. I believe the issue is the network and the cabling, but we didnt have these issues before we put this server into production. I am taking alot of heat over this. I have a ticket open with Microsoft regarding the system logs, but they are stumped and have passed it on to higher people.  The server performs as expected and has no isses other than the network.  There are about 50 users hitting this server.  I am not able to replicate this issue by force and cannot predict when this issue will occur next.  It has crashed at 2am, and 2pm--workload does not seem to be a cause here.

I'm pretty desperate for help/advice/guidance here. Could this be electrical noise? bad cabling? a bad NIC? a server that crashes its own network and the rest? Does any of this make sense?  is this a network issue thats affecting the server or a server issue thats affecting the network?

Thank you very much!

Eventlog 12140 vmguest.iso is "corrupt" and "unreadable"

July 31, 2012, 3:09 pm

≫ Next: Designing a highly available Windows Server 2012 Hyper-V Cluster

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On one of my two Hyper-v host machines, I get an eventlog 12140 (i think only when I restart the server, or restart the vmms service) stating:

"Failed to open attachment 'C:\Windows\system32\vmguest.iso'. Error: 'The file or directory is corrupted and unreadable.'" ....

The file vmguest.iso exists in the folder, and there is also a vmg28b7.tmp file next to the real file with the exact same size...this temp file will not backup and the backup says access denied...

on one of my VMs, I clicked action and selected "insert integration disk...It says "a previous installation exists and asks if I  want to upgrade or repair..I said Yes, and it seems to "repair" fine, and then the VM reboots OK....

Under the VM settings\mamnagement, I see integration services are "all offerred" ..

Can anyone tell me if there is something I should do?

I read somewhere that the iso file will be re-created if I restart the vmms service...i assume that I would firt=st need to remove the existing file from its current location..?

I appreciate ANY help!!1

thanks!!

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Designing a highly available Windows Server 2012 Hyper-V Cluster

July 20, 2012, 12:45 am

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hi all,

With all the hoopla around SMB 3.0 and Storage Spaces and what not around Windows Server 2012, i need some help:

We are desgning our first production Hyper-V cluster now, and plan to run it on the RC version until the RTM ships. This is initially going to be a 2-node cluster, which will be scaled out to around 8 nodes later on. Storage will be on a IBM Storwiz SAN, with HBAs in each cluster node.

What I need to understand is: Do/Should I take into consideration the new storage technologies that Windows Server 2012 brings to the table? I mean, I could probably set up each hyper-v node as a file server and let Hyper-V access its storage through SMB3.0 instead of directly through CSVs, but will I gain anything?

I'm having a hard time finding info on deploying Hyper-V with "good old" HBA/SAN-based storage because of all the new technology.

(Later on, we might implement a SMB3.0-based file cluster for a netapp box and hook that up, but it's out of scope for now)

Any pointers appreciated!

Can not see Hyper-V virtual servers from rest of network.

April 27, 2010, 9:57 am

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I have successfully created Hyper-V servers, added them to a virtual network, and they are able to be added to my domain and connect to the internet.  They can also see other other network resources.

The problem is that the rest of the network can not see these virtual servers.  If I'm trying to host an application on the virtual server, I need it to be visible to the rest of the network, so I'm wondering how to go about addressing the issue.

How do I make these VMs visible to the rest of the domain?

Thanks for any help you can give.

I have Hyper-V Server 2012 installed and I need to manage guest VM's but not sure what to do - this being a Core server

August 1, 2012, 8:15 am

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So is there an MMC GUI I can get installed on the Core server and run from a console seesion on the physical server or RDP session to the Hyper-V Server 2012 Core?  I have worked extensively with Hyper-V in Server 200R2 but always in the "full" install so I had a GUI.  Never worked with Server 2008R2 Core.  Thanks for your help.

2 Node Hyper V cluster help

July 31, 2012, 8:09 am

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Hi,

I have a windows 2008 R2 server running Hyper -V hosting some 18 virtual servers.  It's a Dell R515 with 40GB RAM and 250gb HDD.  All the VMs are stored on a Netgear ReadyNAS4200 using iSCSI to connect to the Windows machine over a 10gb fibre connection through a Netgear 7328TS layer 3 switch.

My question being Has anyone configured clustering on a system that is already running production VM's and what, if any, pitfalls should I look out for?

Regards

Drac

Is it able to keep the VM configurations while restoring the backup made by WSB?

June 24, 2012, 10:31 pm

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OS: Windows Server 2008 R2 with Hyper-V installed.

I had backed up a whole VM folder by Windows Server Backup with VSS support by using this script with Task Scheduler.

• wbadmin start backup -backupTarget:"\\Server1\Share1" -include:"G:\Virtual Servers\test4" -vssfull -quiet

Then I tried to restore the test4.

• I shut down the original test4 VM.
• I restored the test4 files/folders to "G:\Virtual Servers\test5" from the backup made by the above script in WSB console.
• I created a new VM named as test5 in Hyper-V console, set the VM path as "G:\Virtual Servers\" (that means the path of this test5 is "G:\Virtual Servers\test5"), and used the existing virtual disk "G:\Virtual Servers\test5\Virtual Hard Disks\test4.vhd".
  But unfortunately, the Hyper-V didn't use the existing VM configuration file ("G:\Virtual Servers\test5\Virtual Machines\B222195B-CE6F-47EC-8E1F-355DB3F68721.xml"), but created another VM configuration file ("G:\Virtual Servers\test5\Virtual Machines\2DDFC7FB-4920-4E2B-9566-54A5B5E47EB8.xml")

PS: I would not like to use the Export/Import VM function (cold backup) because I have to back up VMs when they are online (hot backup). The backup made by WSB with VSS support does not support Import.

Thank you very much!

How to configure ip addressing on vm in W2008 Std R2?

August 2, 2012, 2:24 am

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hi

this is going to be my first time on the hyper-v.

i would like to ask some guide on how to established networking on the VM for me to establish DC, AD, DNS, DHCP on the dedicated server.

1st - we have dedicated server subscribed to 3rd party vendor 

2nd - i can access the sever (dedicated server) using rdc.

3rd - i install nothing on the server except hyper-v and it is running.

4th - this server is only a work group with public ip address assigned to it by the vendor.

5th - so can i configure my vm's as DC, DNS, DHCP, AC, Exhange, and Lync?

thanks for you help

-osc-

Server 2008 R2 and Hyper V Copying files Really Slow

August 2, 2012, 3:01 am

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Hi Gents,

I'm hoping someone can help me i have had no sleep over this and its driving me nuts :) I'm busy migrating from SBS 2003 to Server 2008 R2 SP1 Ent with 4 Virtual Host. I'm using a Dell PowerEdge 720 with 2 x Six core Processors 64 gigs of Ram and 4Tb running in Raid 5 Configuration. So i installed server 2008 R2 SP1 Ent on the physical host and enabled Hyper V role and proceeded in creating my first Virtual host which is server 2008 R2 SP1 and this server would be used as our file server. So i though everything was going well till users started complaining about slow opening and saving speeds. so i did some test im only able to copy files at a speed of 3-5 mbs from both the physical and virtual host.

I've done all updates to the servers and i have change the NIC settings as ive read on previous posts that this should help, but i have had no success. Any Help would be much appreciated.

Piero  

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HYPER V is not coming in add roles

August 2, 2012, 1:18 am

≫ Next: HyperV Limit guess VM Max Bandwitch

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i am not using window server 2008 standard here i am not getting hyper v roles in add roles option,some1 told me that i will get this option in window server 2008 standard R2,

is this ture

then how many vm i can create in r2 and does i need to purchase os licence also

one more thing if i go for enterprice edistion then i am able tp create 3 vms what about os.,does i   require sepearate lic,,,,,,,,

Kindly help me to understand

Rohit Kumar

HyperV Limit guess VM Max Bandwitch

August 1, 2012, 4:36 pm

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Hi guys,

Is there any way to limit hyper-v guest VM for example to 1 TB max transfer? Or query per VM transfer?

Ty!

new hyper v set up

May 18, 2012, 7:21 am

≫ Next: How to enable jumbo packet via command (not in Server Core, nor Hyper-V server)?

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I am wanting to set up the Hyper-v roll on a server to use 2-3 virutal machines. I have a server running 2008 r2 enterprise that runs our exchange 2010. We have 10 users that have exchange mail boxes currently. Not a high traffic server. Would I be ok to install Hyper-v  to run 2-3 windows xp machines? The server is an HP DL585 g2 with 40 gb of ram and 4 2.8 ghz dual core processors. The exchange server uses about 6 gb of ram currently. Is it better to just run hyper-v on a dedicated server? or would this be ok to do?

How to enable jumbo packet via command (not in Server Core, nor Hyper-V server)?

August 2, 2012, 4:46 am

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In a WS2012 datacenter full installation (not Server Core), I created two VMs running WS2012 Datacenter and WS2008 R2 SP1 Enterprise. And I want to find a way to enable jumbo packet in both machin via commands. In WS2012, there is a PowerShell 3.0 cmdlet that does the trick:

Set-NetAdapterAdvancedProperty -Name "Ethernet" -RegistryKeyword “*JumboPacket” -Registryvalue 9014

But in WS2008 R2 SP1, the commands that set registry and mtu do not work:

reg add HKLM\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\0007 /v *JumboPacket /t REG_SZ /d 9014 /f

netsh int ip set int "Local Area Connection" mtu=9000

However, by simply clicking Network Connections -> Local Aera Connection -> Properties -> Configure... -> Advanced -> Jumbo Packet -> 9014, the setting just works. That is, I can ping the WS2012 VM with "-l 3000 -f" as parameters.

I tried to do a registry snapshot with regsnap, but found too many entries changed. Then tried ProcessMonitor, but only found process svchost.exe was updating network registry frequently. No clear clue can be found on how to implement the same functionaliy of NIC properties clicking via commands.

Any ideas?

Hyper-V error 61658

August 2, 2012, 7:24 am

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Hi

I am desperate.

I un-installed Hyper-V Integration services by mistake, now my mouse does not work, I can get by with keyboard.

This was installed on a Windows 2003 Standard VM with SP2.

So I thought I insert the Integration Services disk (drive D), command prompt and run "SETUP.EXE". The installation proceeds and when it gets to 90% it throws the error 61658 and it does not install the services. Rebooting makes no difference.

Noticed that ipconfig gives me no IP address. I read somewhere to add a legacy network adapter, so I added it and tried the installation again, same error.

Do not know what to do now. I am wondering whether the VMGUEST.ISO is an old version. I do not know where to get the latest hyper-v integration services from.

I searched everywhere.

I must restore this virtual server asap as it is part of a Citrix farm.

Any help greatly appreciated as I am currently feeling very depressed.

Thanks

Regards

Ipnotech