Hyper-V Machine Live Migration

Dear All,
My Server environment:
1. Connect to the company's local network
2. Not configured as DC
3. Not a member of a Domain
4. Machine state-workgroup
In this machine I am running a VM from Hyper-v
In the same network we have a DC which have another VM which is used as a production server for hosting a website.
We would like to migrate that VM from the DC to our local machine.
If we migrate that website then does all the configuration/connections it has with the sharepoint and database will be copied and had same the connection configured once migrated.
Or we need to install all the applications thhat were already installed on the production server machine.
Regards,
AHmed

Hi,
This issue may occur because of an issue in the DNS Client service. When the DNS server
configuration information is changed on a client, the DNS Client service deletes the DNS host record of the client from the old DNS server and then adds it to the new DNS server.
Because the DNS record is present on the new server that is a part of the same domain, the record is not updated. However, the old DNS server replicates the deletion operation to the new DNS server and to other DNS servers.
Therefore, the new DNS server deletes the record, and the record is deleted across the domain. <o:p></o:p>
http://support.microsoft.com/kb/2520155/en-us
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Similar Messages

Server 2012 cluster - virtual machine live migration does not work

Hi,
We have a hyper-v cluster with two nodes running Windows Server 2012. All the configurations are identical.
When I try to make a Live migration from one node to the other I get an error message saying:
Live migration of 'Virtual Machine XXXXXX' failed.
I get no other error messages, not even in event viewer. This same happens with all of our virtual machines.
A normal Quick migration works just fine for all of the virtual machines, so network configuration should not be an issue.
The above error message does not provide much information.

Hi,
Please check whether your configuration meet live migration requirement:
Two (or more) servers running Hyper-V that:
Support hardware virtualization.
Yes they support virtualization.
Are using processors from the same manufacturer (for example, all AMD or all Intel).
Both Servers are identical and brand new Fujitsu-Siemens RX300S7 with the same kind of processor (Xeon E5-2620).
Belong to either the same Active Directory domain, or to domains that trust each other.
Both nodes are in the same domain.
Virtual machines must be configured to use virtual hard disks or virtual Fibre Channel disks (no physical disks).
All of the vitual machines have virtual hard disks.
Use of a private network is recommended for live migration network traffic.
Have tried this, but does not help.
Requirements for live migration in a cluster:
Windows Failover Clustering is enabled and configured.
Yes
Cluster Shared Volume (CSV) storage in the cluster is enabled.
Yes
Requirements for live migration using shared storage:
All files that comprise a virtual machine (for example, virtual hard disks, snapshots, and configuration) are stored on an SMB share. They are all on the same CSV
Permissions on the SMB share have been configured to grant access to the computer accounts of all servers running Hyper-V.
Requirements for live migration with no shared infrastructure:
No extra requirements exist.
Also please refer to this article to check whether you have finished all preparation works for live migration:
Virtual Machine Live Migration Overview
http://technet.microsoft.com/en-us/library/hh831435.aspx
Hyper-V: Using Live Migration with Cluster Shared Volumes in Windows Server 2008 R2
http://technet.microsoft.com/en-us/library/dd446679(v=WS.10).aspx
Configure and Use Live Migration on Non-clustered Virtual Machines
http://technet.microsoft.com/en-us/library/jj134199.aspx
Hope this helps!
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I have also read all of the technet articles but can't find anything that could help.

Hyper-V Storage Live Migration: Copy instead of move?

Have a 2012 R2 Hyper-V Cluster with a HP MSA 2000 Storage. No storage pools or storage spaces, just 4 LUN's with NTFS Volumes that are all converted to CSV's.
Have to perform VM migration from VM's that resides on a CSV with an underlying RAID 5 volume to another CSV with an underlying RAID 50 volume. Could perform the operation without any error from the failover cluster manager (move - virtual machine storge) on
the VM.
The problem is that when I check C:\ClusterStorage\Volume1 (the old place of the VM) and C:\ClusterStorage\Volume2 (the new place of the VM), all VM files are still in both locations! Apparently, a "Copy" operation instead of a "move" operation
was performed.
- Why are the source files not have been deleted after the successful storage migration?
- Is it safe to manually delete the VM files in C:\ClusterStorage\Volume1?
Thank you in advance for any help.
Franz

Hi FranzSchenk,
To perform a move, FOCM first copys the files over to the new location and then moves the mahine over to the new location with all memory and machine writes before then removing the old files. If the files haven't been removed (this does happen)
it could be permission's that stop the files being removed.
It would be worth checking the running VMs and checking where its pointing for the virtual drives and perhaps look at where its BIN file is for memory and where the XML machine configuration is located. If all are pointing to the new location
then it would be safe to delete the old files.
Kind Regards
Michael Coutanche
Blog:
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Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.
Hi Michael
Do you have more specific information what kind of permission issue you mean, and how we can correct that? And why is no warning or error message visible or in the eventlogs that the source files have not been deleted during the live strorage migration?
Kind regards, Franz

Live migration stopped working

I have a two host cluster with 4 VMs. Hosts are 2008 R2, guests are 2x Windows 2x Linux.
Last week one of my Windows servers would not live migrate, but the other 3 would.
After troubleshooting, I rebuilt the VM. (new VM, moved VHD). Then it started moving. Great!
Now, today, two of the VMs will not move with the exact same set of errors.
On the source machine:
'Virtual Machine <machine>' live migration did not succeed at the source.
On the target:
Cluster resource 'Virtual Machine Configuration '<machine>' in clustered service or application '<machine>' failed.
'Virtual Machine Configuration <machine>' failed to register the virtual machine with the virtual machine management service.
The Cluster service failed to bring clustered service or application '<machine>' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered
service or application.
I'd appreciate any help in getting this resolved.

Hi JasonAGauthier,
This error some times occur when the VMM service account is not part of local admin group in all hosts, please added the VMM service account to local admin group on all hosts.
Another general possible is configuration Cache Files
.XML were corrupt in "C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines Cache"
Moved the VM to others node and renamed "C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines Cache\<VirtaulMachine.XML>
as <VirtaulMachine.XML> .old then move the vm back.
More information:
Event ID 20100 — Cluster
http://technet.microsoft.com/en-us/library/dd582018(WS.10).aspx
Event ID 16300 — Virtual Machine Configuration File
http://technet.microsoft.com/en-us/library/dd581884(WS.10).aspx
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Hyper-v 2012 r2 slow throughputs on network / live migrations

Hi, maybe someone can point me in the right direction, I have 10 servers 5 Dell r210s and 5 Dell R320's, I have basically converted these servers to standalone hyper-v 2012 servers, so there is no clustering on any at the moment.
Each server is configured with 2 1Gb nics teamed via a virtual switch, now when I copt files between server 1 and 2 for example I see 100MBs throughput, but if I copy a file to server 3 at the same time the file copy load splits the 100MBs throughput between
the 2 copy processes. I was under the impression if I copied 2 files to 2 totally different servers the load would basically be split across the 2 nics effectively giving me 2Gbs throughput but this does not seem to be the case. I have played around with tcpip
large send offloads, jumbo packets, disabled vmq on the cards, they are broadcoms. :-( but it doesn't really seem to make a difference with all of these settings.
The other issue is If I live migrate a 12Gb vm machine running only 2gb ram, effectively just an o/s it takes between 15 to 20 minutes to migrate, I have played around with the advanced settings, smb, compression, tcpip not real game changers, BUT if I shut
town the vm and migrate it, it takes, just under 3 and a half minutes to move across.
I am really stumped here, I am busy in a test phase of hyper-v but cant find any definitive documents relating to this stuff.

Hi Mark,
The servers (hyper-v 2012 r2) are all basically configured with ssvmm2012R2 where they all have teamed 1Gb pNics, into a virtual switch, then there are vNics for the Vmcloud, live migration etc. The physical network is 2 Netgear Gs724T switches which
are interlinked and each servers 1st nic is plugged into the switch1 and the second nic is plugged into the switch2.See Below Image) The hyper-v port is set to independent Hyper-v load balancing.
The R320 servers are running raid 5 sas drives, the R210s have 1Tb drives mirrored. The servers all are using DAS storage, we have not moved to looking at using iscsi and san is out the question at the moment.
I am currently testing between 2x 320s and 2x R210s, I am not copying data to the vm's yets, I am basically testing the transfer between the actual hosts at the moment by copying a 4Gb file manually, After testing the live migrations I decided to test to
see the transfer rates between the servers first, I have been playing around with the offload settings and rss, what I don't understand is yesterday, the copy between the servers was running up to 228Mbs ie (using both nics) when copying
the file between the servers, and then a few hours later it only was copying at 50/60Mbs, but its now back at 113Mbs seemingly to be only using one nic.
I was under the impression if you copy a file between 2 servers the nicks could use the 2gb bandwidth, but after reading many posts they say only one nic, so how did the copies get up to 2Gb yesterday. Then again if you copy files between 3 servers, then
each copy would use one nic, basically giving you 2Gbs, but this is again not being seen.
Regards Keith

Hyper-V replica vs Shared Nothing Live Migration

Shared Nothing Live Migration allows to transport your VM over the WAN without shutting it down (how much time it takes on io intensive vm is another story)
  Hyper-V replica does not allow to perform the DR switch without shutdown operation on primary site VM !
why can't it take the VM live to the DR ?
that's because if we use Shared Nothing across the WAN, we don't use the data that Hyper-V replica can and then it also breaks everything hyper-V replica does.
Point is: how to take the VM to DR in running state, what is the best way to do that ?
Shahid Roofi

Hi Shahid,
Hyper-V Replica is designed as a DR technology, not as a technique to move VMs. It assumes that should you require it, the source VM would probably be offline and therefore you would be powering up the passive copy from a previous point in time
as its not a true synchronous replica copy. It does give you the added benefit to be able to run a planned failover which as you say, powers of the VM first, runs a final Sync then powers the new VM up. Obviously you cant have the duplicate copy of this VM
running all the time at the remote site, otherwise you would have a split brain situation for network traffic.
Like the live migration the shared nothing live migration is a technology aimed at moving a VM, but as you know offers the ability to do this without having shared storage and only requires a network connection. When initiated moves the whole
VM, well copies the virtual drive and memory before sending machine writes to both, then only to the new VM when they both match. With regards to the speed, I assume you have the SNLM setup to compress data before sending across the wire?
If you want a true live migration between remote sites, one way would be to have a SAN array between both sites synchronously replicating data, then stretch the Hyper-V cluster across both sites. Obviously this is a very expensive solution but perhaps
the perfect scenario.
Kind Regards
Michael Coutanche
Blog:
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Hyper-V guest SQL 2012 cluster live migration failure

I have two IBM HX5 nodes connected to IBM DS5300. Hyper-V 2012 cluster was built on blades. In HV cluster was made six virtual machines, connected to DS5300 via HV Virtual SAN. These VMs was formed a guest SQL Cluster. Databases' files are placed on
DS5300 storage and available through VM FibreChannel Adapters. IBM MPIO Module is installed on all hosts and VMs.
SQL Server instances work without problem. But! When I try to live migrate SQL VM to another HV node an SQL Instance fails. In SQL error log I see:
2013-06-19 10:39:44.07 spid1s      Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.07 spid1s      SQLServerLogMgr::LogWriter: Operating system error 170(The requested resource is in use.) encountered.
2013-06-19 10:39:44.07 spid1s      Write error during log flush.
2013-06-19 10:39:44.07 spid55      Error: 9001, Severity: 21, State: 4.
2013-06-19 10:39:44.07 spid55      The log for database 'Admin' is not available. Check the event log for related error messages. Resolve any errors and restart the database.
2013-06-19 10:39:44.07 spid55      Database Admin was shutdown due to error 9001 in routine 'XdesRMFull::CommitInternal'. Restart for non-snapshot databases will be attempted after all connections to the database are aborted.
2013-06-19 10:39:44.31 spid36s     Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.31 spid36s     fcb::close-flush: Operating system error (null) encountered.
2013-06-19 10:39:44.31 spid36s     Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.31 spid36s     fcb::close-flush: Operating system error (null) encountered.
2013-06-19 10:39:44.32 spid36s     Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.32 spid36s     fcb::close-flush: Operating system error (null) encountered.
2013-06-19 10:39:44.32 spid36s     Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.32 spid36s     fcb::close-flush: Operating system error (null) encountered.
2013-06-19 10:39:44.33 spid36s     Starting up database 'Admin'.
2013-06-19 10:39:44.58 spid36s     349 transactions rolled forward in database 'Admin' (6:0). This is an informational message only. No user action is required.
2013-06-19 10:39:44.58 spid36s     SQLServerLogMgr::FixupLogTail (failure): alignBuf 0x000000001A75D000, writeSize 0x400, filePos 0x156adc00
2013-06-19 10:39:44.58 spid36s     blankSize 0x3c0000, blkOffset 0x1056e, fileSeqNo 1313, totBytesWritten 0x0
2013-06-19 10:39:44.58 spid36s     fcb status 0x42, handle 0x0000000000000BC0, size 262144 pages
2013-06-19 10:39:44.58 spid36s     Error: 17053, Severity: 16, State: 1.
2013-06-19 10:39:44.58 spid36s     SQLServerLogMgr::FixupLogTail: Operating system error 170(The requested resource is in use.) encountered.
2013-06-19 10:39:44.58 spid36s     Error: 5159, Severity: 24, State: 13.
2013-06-19 10:39:44.58 spid36s     Operating system error 170(The requested resource is in use.) on file "v:\MSSQL\log\Admin\Log.ldf" during FixupLogTail.
2013-06-19 10:39:44.58 spid36s     Error: 3414, Severity: 21, State: 1.
2013-06-19 10:39:44.58 spid36s     An error occurred during recovery, preventing the database 'Admin' (6:0) from restarting. Diagnose the recovery errors and fix them, or restore from a known good backup. If errors are not corrected or expected,
contact Technical Support.
In windows system log I see a lot of warnings like this:
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider
Name="Microsoft-Windows-Ntfs" Guid="{3FF37A1C-A68D-4D6E-8C9B-F79E8B16C482}" />
<EventID>140</EventID>
<Version>0</Version>
<Level>3</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000008</Keywords>
<TimeCreated
SystemTime="2013-06-19T06:39:44.314400200Z" />
<EventRecordID>25239</EventRecordID>
<Correlation
/>
<Execution
ProcessID="4620" ThreadID="4284" />
<Channel>System</Channel>
<Computer>sql-node-5.local.net</Computer>
<Security
UserID="S-1-5-21-796845957-515967899-725345543-17066" />
</System>
- <EventData>
<Data Name="VolumeId">\\?\Volume{752f0849-6201-48e9-8821-7db897a10305}</Data>
<Data Name="DeviceName">\Device\HarddiskVolume70</Data>
<Data Name="Error">0x80000011</Data>
</EventData>
</Event>
The system failed to flush data to the transaction log. Corruption may occur in VolumeId: \\?\Volume{752f0849-6201-48e9-8821-7db897a10305}, DeviceName: \Device\HarddiskVolume70.
({Device Busy}
The device is currently busy.)
There aren't any error or warning in HV hosts.

Hello,
I am trying to involve someone more familiar with this topic for a further look at this issue. Sometime delay might be expected from the job transferring. Your patience is greatly appreciated.
Thank you for your understanding and support.
Regards,
Fanny Liu
If you have any feedback on our support, please click
here.
Fanny Liu
TechNet Community Support

Hyper-V Live Migration Compatibility with Hyper-V Replica/Hyper-V Recovery Manager

Hi,
Is Hyper-V Live Migration compatible with Hyper-V Replica/Hyper-V Recovery
Manager?
I have 2 Hyper-V clusters in my datacenter - both using CSVs on Fibre Channel arrays. These clusters where created and are managed using the same "System Center 2012 R2 VMM" installation. My goal it to eventually move one of these clusters to a remote
DR site. Both sites are connected/will be connected to each other through dark fibre.
I manually configured Hyper-V Replica in the Fail Over Cluster Manager on both clusters and started replicating some VMs using Hyper-V
Replica.
Now every time I attempt to use SCVMM to do a Live Migration of a VM that is protected using Hyper-V Replica to
another host within the same cluster,
the Migration VM Wizard gives me the following "Rating Explanation" error:
"The virtual machine virtual machine name which
requires Hyper-V Recovery Manager protection is going to be moved using the type "Live". This could break the recovery protection status of the virtual machine.
When I ignore the error and do the Live Migration anyway, the Live migration completes successfully with the info above. There doesn't seem to be any impact on the VM or it's replication.
When a Host Shuts-down or is put into maintenance, the VM Migrates successfully, again, with no noticeable impact on users or replication.
When I stop replication of the VM, the error goes away.
Initially, I thought this error was because I attempted to manually configure
the replication between both clusters using Hyper-V Replica in Failover Cluster Manager (instead of using Hyper-V Recovery Manager).
However, even after configuring and using Hyper-V Recovery Manager, I still get the same error. This error does not seem to have any impact on the high-availability of
my VM or on Replication of this VM. Live migrations still occur successfully and replication seems to carry on without any issues.
However, it now has me concern that Live Migration may one day occur and break replication of my VMs between both clusters.
I have searched, and searched and searched, and I cannot find any mention in official or un-official Microsoft channels, on the compatibility of these two features.
I know vMware vSphere replication and vMotion are compatible with each otherhttp://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.replication_admin.doc%2FGUID-8006BF58-6FA8-4F02-AFB9-A6AC5CD73021.html.
Please confirm to me: Are Hyper-V Live Migration and Hyper-V Replica compatible
with each other?
If they are, any link to further documentation on configuring these services so that they work in a fully supported manner will be highly appreciated.
D

This can be considered as a minor GUI bug.
Let me explain. Live Migration and Hyper-V Replica is supported on both Windows Server 2012 and 2012 R2 Hyper-V.
This is because we have the Hyper-V Replica Broker Role (in a cluster) that is able to detect, receive and keep track of the VMs and the synchronizations. The configuration related to VMs enabled with replications follows the VMs itself.
If you try to live migrate a VM within Failover Cluster Manager, you will not get any message at all. But VMM will (as you can see), give you an
error but it should rather be an informative message instead.
Intelligent placement (in VMM) is responsible for putting everything in your environment together to give you tips about where the VM best possible can run, and that is why we are seeing this message here.
I have personally reported this as a bug. I will check on this one and get back to this thread.
Update: just spoke to one of the PMs of HRM and they can confirm that live migration is supported - and should work in this context.
Please see this thread as well: http://social.msdn.microsoft.com/Forums/windowsazure/en-US/29163570-22a6-4da4-b309-21878aeb8ff8/hyperv-live-migration-compatibility-with-hyperv-replicahyperv-recovery-manager?forum=hypervrecovmgr
-kn
Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

Hyper-v Live Migration not completing when using VM with large RAM

hi,
i have a two node server 2012 R2 cluster hyper-v which uses 100GB CSV, and 128GB RAM across 2 physical CPU's (approx 7.1GB used when the VM is not booted), and 1 VM running windows 7 which has 64GB RAM assigned, the VHD size is around 21GB and the BIN file
is 64GB (by the way do we have to have that, can we get rid of the BIN file?).
NUMA is enabled on both servers, when I attempt to live migrate i get event 1155 in the cluster events, the LM starts and gets into 60 something % but then fails. the event details are "The pending move for the role 'New Virtual Machine' did not complete."
however, when i lower the amount of RAM assigned to the VM to around 56GB (56+7 = 63GB) the LM seems to work, any amount of RAM below this allows LM to succeed, but it seems if the total used RAM from the physical server (including that used for the
VMs) is 64GB or above, the LM fails.... coincidence since the server has 64GB per CPU.....
why would this be?
many thanks
Steve

Hi,
I turned NUMA spanning off on both servers in the cluster - I assigned 62 GB, 64GB and 88GB and each time the VM started up no problems. with 62GB LM completed, but I cant get LM to complete with 64GB+.
my server is a HP DL380 G8, it has the latest BIOS (I just updated it today as it was a couple of months behind), i cant see any settings in BIOS relating to NUMA so i'm guessing it is enabled and cant be changed.
if i run the cmdlt as admin I get ProcessorsAvailability : {0, 0, 0, 0...}
if i run it as standard user i get ProcessorsAvailability
my memory and CPU config are as follows, hyper-threading is enabled for the CPU but I dont
think that would make a difference?
Processor 1 1 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 1 4 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 1 9 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 1 12 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 2 1 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 2 4 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 2 9 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor 2 12 Good, In Use Yes 713756-081 DIMM DDR3 16384 MB 1600 MHz 1.35 V 2 Synchronous
Processor Name
Intel(R) Xeon(R) CPU E5-2695 v2 @ 2.40GHz
Processor Status
OK
Processor Speed
2400 MHz
Execution Technology
12/12 cores; 24 threads
Memory Technology
64-bit Capable
Internal L1 cache
384 KB
Internal L2 cache
3072 KB
Internal L3 cache
30720 KB
Processor 2
Processor Name
Intel(R) Xeon(R) CPU E5-2695 v2 @ 2.40GHz
Processor Status
OK
Processor Speed
2400 MHz
Execution Technology
12/12 cores; 24 threads
Memory Technology
64-bit Capable
Internal L1 cache
384 KB
Internal L2 cache
3072 KB
Internal L3 cache
30720 KB
thanks
Steve

Hyper-v 2012 R2 Live migration issue in 2003 Domain function Level

hi Team ,
i recently build 2012 R2 Hyper-v Cluster with three node. Everrything working fine with out any issue . Cluster working also fine. Later i came across one issue when tried to Live migration virtual machine from one host to another . it failed all the time
while quick migration is working . i gone through few articles and find it is known issue with hyper-v 2012 R2 where domain functional level is set to 2003 . although they have provided Hotfix but no solution.
http://support.microsoft.com/kb/2838043
Please let me know if any one face similar issue and able to resolve by any hotfix. My host are updated .
Thanks
Ravindra
Ravi

Hi Ravi1987,
The KB2838043 is applied for Server 2012 node, Could you offer us the related cluster error event id, or you can refer the following article to check your cluster
network binding order is correct or not.
Configuring Windows Failover Cluster Networks
http://blogs.technet.com/b/askcore/archive/2014/02/20/configuring-windows-failover-cluster-networks.aspx
You can try to install recommended hotfixes and updates for Windows Server 2012 R2-based failover clusters first, then monitor this issue again.
The KB download:
Recommended hotfixes and updates for Windows Server 2012 R2-based failover clusters
http://support.microsoft.com/kb/2920151
More information:
Windows Server 2008 R2 Live Migration – “The devil may be in the networking details.”
http://blogs.technet.com/b/askcore/archive/2009/12/10/windows-server-2008-r2-live-migration-the-devil-may-be-in-the-networking-details.aspx
I’m glad to be of help to you!

Hyper-V live migration failed

There is Hyper-V cluster with 2 nodes. Windows Server 2012 R2 is used as operating system.
Trying to live migrate test VM from node 1 to node 2 and get error 21502:
Live migration of 'Virtual Machine test' failed.
'Virtual Machine test' failed to fixup network settings. Verify VM settings and update them as necessary.
VM has Network Adapter connected to Virtual switch. This vSwitch has Private network as connection type.
If I set virtual switch property to "Not connected" in Network Adapter settings of VM I get successful migration.
All VM's that are not connected to any private networks (virtual switches with private network connection type) can be live migrated without any issues.
Is there any official reference related to Hyper-V live migration of VM's that have "private network" connection type?

I can Live Migrate virtual machines with adapters on private switches without error. Aside from having the wrong name, the only way I can get it to fail is if I make the switch on one host use a different QoS minimum mode than the other and
enable QoS on the virtual adapter. Even then I get a different message than what you're getting. I only get that one with differently named switches.
There is a PowerShell cmdlet available to see why a guest won't run on another host.
Here's an example of its usage.
There's a way to use it to get it to Live Migrate.
But there is no way to truly Live Migrate three virtual machines in perfect lockstep. Even if you figure out whatever is preventing you from migrating these machines, there will still be periods during Live Migration where they can't communicate across that
private network. You also can't guarantee that all these guests will always be running on the same host without preventing Live Migration in the first place. This is why there really isn't anyone doing what you're trying to do. I suggest you consider another
isolation solution, like VLANs.
Eric Siron Altaro Hyper-V Blog
I am an independent blog contributor, not an Altaro employee. I am solely responsible for the content of my posts.
"Every relationship you have is in worse shape than you think."

LIve migration trigger on Resource crunch in Hyper-v 2012 or R2

Like VMware DRS , who can trigger Migration of virtual machine from 1 datastore to another or 1 host to another. do we have same kind of machanism in Hyper-v 2012 also.
i have five HYper-v 2012 host in single cluster. now i want if any host face resource crucnh of memory than it migrate the virtual machine on another host.
Thanks ravinder
Ravi

SCVMM has a feature called Dynamic Optimization.
Dynamic Optimization can be configured on a host group, to migrate virtual machines within host clusters with a specified frequency and aggressiveness. Aggressiveness determines the amount of load imbalance that is required to initiate a migration during
Dynamic Optimization. By default, virtual machines are migrated every 10 minutes with medium aggressiveness. When configuring frequency and aggressiveness for Dynamic Optimization, an administrator should factor in the resource cost of additional migrations
against the advantages of balancing load among hosts in a host cluster. By default, a host group inherits Dynamic Optimization settings from its parent host group.
Dynamic Optimization can be set up for clusters with two or more nodes. If a host group contains stand-alone hosts or host clusters that do not support live migration, Dynamic Optimization is not performed on those hosts. Any hosts that are in maintenance
mode also are excluded from Dynamic Optimization. In addition, VMM only migrates highly available virtual machines that use shared storage. If a host cluster contains virtual machines that are not highly available, those virtual machines are not migrated during
Dynamic Optimization.
http://technet.microsoft.com/en-us/library/gg675109.aspx
Cheers !
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
InsideVirtualization.com

Live Migrating Virtual Machines with Shared VHDx

I am facing problems when live migrating a Virtual Machine that is using Shared VHDx. The Virtual Machine gets migrated that is the configuration gets migrated, but the Virtual Machine fails to start up and if manually tried, it fails too.
What is the method to to live migrate virtual machines that are using Shared VHDx. Thanks in advance.

Another couple of gotchas:
You cannot do host-level backups of the guest cluster. This is the same as it always was. You will have to install backup agents in the guest cluster nodes and back them up as if they were physical machines.
You cannot perform a hot-resize of the shared VHDX. But you can hot-add more shared VHDX files to the clustered VMs.
You cannot Storage Live Migrate the shared VHDX file. You can move the other VM files and perform normal Live Migration.
as Long as you have your shared VHDx on a SMB3 Share you also could have the Nodes of the Guest Cluster on different Hyper-V Hosts.

Virtual Machines With Large RAM Fails Live Migration

Hi everyone....
I have a 2-node Hyper-V cluster managed by SCVMM 2012 R2. I am current unable to migrate a VM that is using 48 GB of RAM. Each node has 256 GB of RAM running Windows Server 2012 R2.
When the VM is running on node 1; there is 154 GB in use, and 102 GB available. When I try to migrate this VM to node 2, (which has 5.6 GB in use, and 250 GB available), I get this error message in VMM:
Error (10698)
The virtual machine (abc-defghi-vm) could not be live migrated to the virtual machine host (xyz-wnbc-nd03) using this cluster configuration.
Recommended Action
Check the cluster configuration and then try the operation again.
(In case you were wondering, I ran the cluster validation and it passed without a problem.)
The Failover Cluster event log shows two key entries:
First:
Cluster resource 'SCVMM xyz-wnbc-vm' in clustered role 'SCVMM xyz-wnbc-vm Resources' has transitioned from state OfflineCallIssued to state OfflinePending.
Exactly 60 seconds later, this message takes place:
Cluster resource 'SCVMM abc-defghi-vm in clustered role 'SCVMM abc-defghi-vm Resources' rejected a move request to node 'xyz-wnbc-nd03'. The error code was '0x340031'. Cluster resource 'SCVMM abc-defghi-vm' may be busy or in a state where it
cannot be moved. The cluster service may automatically retry the move.
Nothing found after Googling "0x340031". Does anyone know what error that is?
Other notes:
If the Virtual machine is shut down I can migrate it.
If I lower the VM RAM settings and start it up again I can do a Live Migration.
All other VMs can do the Live Migration; largest RAM size is 16GB.
Any suggestions?

Hi Sir,
Could you please check if NUMA setting for every node are same via using perfmon.exe and using counter "Hyper-v VM Vid Numa Node " :
>>and the virtual machine in question has it enabled as well.
Could you please also post the NUMA setting of that VM for us ?
Best Regards,
Elton Ji
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Live Migration Fails with error Synthetic FiberChannel Port: Failed to finish reserving resources on an VM using Windows Server 2012 R2 Hyper-V

Hi, I'm currently experiencing a problem with some VMs in a Hyper-V 2012 R2 failover cluster using Fiber Channel adapters with Virtual SAN configured on the hyper-v hosts.
I have read several articles about this issues like this ones:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/baca348d-fb57-4d8f-978b-f1e7282f89a1/synthetic-fibrechannel-port-failed-to-start-reserving-resources-with-error-insufficient-system?forum=winserverhyperv
http://social.technet.microsoft.com/wiki/contents/articles/18698.hyper-v-virtual-fibre-channel-troubleshooting-guide.aspx
But haven't been able to fix my issue.
The Virtual SAN is configured on every hyper-v host node in the cluster. And every VM has 2 fiber channel adapters configured.
All the World Wide Names are configured both on the FC Switch as well as the FC SAN.
All the drivers for the FC Adapter in the Hyper-V Hosts have been updated to their latest versions.
The strange thing is that the issue is not affecting all of the VMs, some of the VMs with FC adapters configured are live migrating just fine, others are getting this error.
Quick migration works without problems.
We even tried removing and creating new FC Adapters on a VM with problems, we had to configure the switch and SAN with the new WWN names and all, but ended up having the same problem.
At first we thought is was related to the hosts, but since some VMs do work live migrating with FC adapters we tried migrating them on every host, everything worked well.
My guess is that it has to be something related to the VMs itself but I haven't been able to figure out what is it.
Any ideas on how to solve this is deeply appreciated.
Thank you!
Eduardo Rojas

Hi Eduardo,
How are things going ?
Best Regards
Elton Ji
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Hyper-V Machine Live Migration

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