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Guest Slow Network Connection with Jumbo Packets

I have enabled jumbo packets everywhere in my network.

I verified that jumbo packets are enabled on the Hyper-V host physical NICs and Hyper-V virtual switch.

I tested pinging full size frames with no fragmenting from the Hyper-V host to another physical machine.

I tested Internet downloads from the Hyper-V host at full speed.

Inside the Hyper-V guest, if I leave jumbo packets disabled, all is fine.

If I switch the guest to 4K or 9K jumbo packets I get extremely slow LAN and WAN speeds.

Has anyone run into this before?


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a virtual machine resource was not found in clustered virtual machine

Hi guys, I’,m doing a cluster to cluster replication, and created a DR and PR replication broker. I’m doing an initial replication, but i get the error "a virtual machine resource was not found in clustered virtual machine"

Might this be due to different VSwitch Names for both PR and DR? I cant figure out what’s causing this

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hyper v ubuntu vm stuck in restoring

how can i get out from this state? can’t stop, can’t kill the process.

any advice?

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Two dhcp servers one virtual switch on Hyper-V

Hey guys, I’m looking to solve this riddle, but I’m stuck and can find a solution, I wonder if is possible to have two subnet both servers have AD/DC/DNS/DHCP roles in the same virtual switch in Hyper-V.



VM1 server IP configuration

VM2 server IP configuration

the second one, won’t resolve the configuration.

Is this configuration possible?

Thank you in advance.


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Isolate local VLAN traffic from office network

I have just set up a Hyper-V VLAN on my office workstation for the purpose of testing network changes prior to implementation. The VLAN has a host server running Windows Server 2016 with DHCP, DNS, Windows Deployment Service and Active Directory. There are
also 2 clients running Windows 10. Currently the VLAN is on a Private switch, so there is no risk of my VLAN traffic bleeding into my office network. I’m at the point where I need to connect this VLAN to the internet, but in a way that there is no risk of
introducing any VLAN traffic, rogue DHCP servers, DNS explosions or any other assorted goodies onto my office’s production network. My workstation hosting this VLAN is a client on my office network which has a Windows 2012 R2 server also running DHCP, DNS
and AD, so there’s plenty to go wrong if don’t do this properly. I’ve set my VLAN on a different subnet, 192.168.10.# vs the office’s 192.168.20.#. I’m not sure if this is sufficient, or if there’s more that I’m missing. 

I know I’m not the first person to do this, but despite all my searching, I can’t seem to find anything that addresses my particular configuration. I’m still new to this, though, so maybe I’m not searching the right terms. Also, if someone knows a good tutorial
to point me toward, that would be great too.


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Evend ID 19050 when exporting VMs via scheduled Powershell script

I have several servers that export their running VMs using Mike Galvin’s script here:

In short this script checks for running VMs, exports the running VMs to a particular location, logs it, and can email if desired.

All but one of our servers runs this script fine. On the server in question I can log personally, open powershell in admin mode and successfully run this script with zero errors. However sometime in the last year the automated way we run this script stopped
working… sort of.

On this server there are 7 VMs running. When the script is kicked off via Scheduled Tasks, 6 of the 7 VMs take the following error:
Event ID 19050 ‘ServerX’ failed to perform the operation. The virtual machine is not in a valid state to perform the operation. (Virtual machine ID 7B70D5A0-F71C-45BA-8506-AB5A983594AF)

We have a dedicated account that runs these scripts. Again all other servers running this script have zero errors. I changed the account running this script to my own since I can successfully run it manually. Still pulls that error.

I’ve done a little searching on it and most of the data I find doesn’t help. Does anyone have any ideas?

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Hyper-V Live Migration:CredSSP


Hi folks,

While configuring settings for Live Migrations in H-V there are 2 authentication options, one of them is CredSSP. There is pretty solid info about Kerberos, but I wonder why and when would you go for

Any example. I understand that no further config is needed in this case. There is very little info about this bird.

Thanks for your insights!

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Server Manager crashes with a dump

Hello everyone!

I have got a crash dump of Server Manager (WS 2016 Datacenter)

I opened dump with windbg and have got a next stacktrace (1419 frames):

 # Child-SP          RetAddr           Call Site
00 00000008`e5700e00 00007ffe`7f0c962a ntdll!RtlDispatchException+0x3c
01 00000008`e5701500 00007ffe`62e7ff0c ntdll!KiUserExceptionDispatch+0x3a
02 00000008`e5701c08 00007ffe`62b8d18a clr!DontCallDirectlyForceStackOverflow+0x10
03 00000008`e5701c10 00007ffe`629b77af clr!CLRVectoredExceptionHandler+0xa8
04 00000008`e5701c70 00007ffe`7f085ef0 clr!CLRVectoredExceptionHandlerShim+0xa3
05 00000008`e5701ca0 00007ffe`7f05fa7b ntdll!RtlpCallVectoredHandlers+0x104
06 00000008`e5701d40 00007ffe`7f0c962a ntdll!RtlDispatchException+0x6b
07 00000008`e5702440 00007ffe`62e7ff0c ntdll!KiUserExceptionDispatch+0x3a
08 00000008`e5702b48 00007ffe`62b8d18a clr!DontCallDirectlyForceStackOverflow+0x10
09 00000008`e5702b50 00007ffe`629b77af clr!CLRVectoredExceptionHandler+0xa8
0a 00000008`e5702bb0 00007ffe`7f085ef0 clr!CLRVectoredExceptionHandlerShim+0xa3
0b 00000008`e5702be0 00007ffe`7f05fa7b ntdll!RtlpCallVectoredHandlers+0x104
0c 00000008`e5702c80 00007ffe`7f0c962a ntdll!RtlDispatchException+0x6b
0d 00000008`e5703380 00007ffe`7f061fd1 ntdll!KiUserExceptionDispatch+0x3a
0e 00000008`e5703a80 00007ffe`6292e761 ntdll!RtlVirtualUnwind+0x91
0f 00000008`e5703b10 00007ffe`62a6c0fd clr!RtlVirtualUnwind_Wrapper+0x81



556 00000008`e57faf90 00007ffe`62a6c0fd clr!RtlVirtualUnwind_Wrapper+0x81
557 00000008`e57fafe0 00007ffe`62a6c028 clr!FixupDispatcherContext+0xc5
558 00000008`e57fb520 00007ffe`7f0ca4bd clr!FixContextHandler+0x48
559 00000008`e57fb550 00007ffe`7f05fd83 ntdll!RtlpExecuteHandlerForException+0xd
55a 00000008`e57fb580 00007ffe`7f0c962a ntdll!RtlDispatchException+0x373
55b 00000008`e57fbc80 00007ffe`7f061fd1 ntdll!KiUserExceptionDispatch+0x3a
55c 00000008`e57fc390 00007ffe`6292e761 ntdll!RtlVirtualUnwind+0x91
55d 00000008`e57fc420 00007ffe`62a6c0fd clr!RtlVirtualUnwind_Wrapper+0x81
55e 00000008`e57fc470 00007ffe`62a6c028 clr!FixupDispatcherContext+0xc5
55f 00000008`e57fc9b0 00007ffe`7f0ca4bd clr!FixContextHandler+0x48
560 00000008`e57fc9e0 00007ffe`7f05fd83 ntdll!RtlpExecuteHandlerForException+0xd
561 00000008`e57fca10 00007ffe`7f061a99 ntdll!RtlDispatchException+0x373
562 00000008`e57fd110 00007ffe`7b544c48 ntdll!RtlRaiseException+0x2d9
563 00000008`e57fd8f0 00007ffe`628a11e9 KERNELBASE!RaiseException+0x68
564 00000008`e57fd9d0 00007ffe`628a121b clr!NakedThrowHelper2+0x9
565 00000008`e57fda00 00007ffe`53a409ff clr!NakedThrowHelper_RspAligned+0x1e
566 00000008`e57fdf28 00007ffe`53a43a5e Microsoft_Windows_ServerManager_HyperV_Plugin_ni+0x409ff
567 00000008`e57fdf30 00007ffe`628a6a93 Microsoft_Windows_ServerManager_HyperV_Plugin_ni+0x43a5e
568 00000008`e57fdf70 00007ffe`628a6948 clr!CallDescrWorkerInternal+0x83
569 00000008`e57fdfb0 00007ffe`628a720d clr!CallDescrWorkerWithHandler+0x4e
56a 00000008`e57fdff0 00007ffe`62905324 clr!MethodDescCallSite::CallTargetWorker+0xf8
56b 00000008`e57fe0f0 00007ffe`629052ae clr!TryCallMethodWorker+0x1c
56c 00000008`e57fe150 00007ffe`629d1774 clr!TryCallMethod+0x76
56d 00000008`e57fe240 00007ffe`614ea76b clr!RuntimeTypeHandle::CreateInstance+0x2e4
56e 00000008`e57fe580 00007ffe`614ea519 mscorlib_ni!System.RuntimeType.CreateInstanceSlow(Boolean, Boolean, Boolean, System.Threading.StackCrawlMark ByRef)$##6001197+0x8b
56f 00000008`e57fe600 00007ffe`6145115c mscorlib_ni!System.Activator.CreateInstance(System.Type, Boolean)$##6000749+0x69
570 00000008`e57fe650 00007ffe`583d9406 mscorlib_ni!System.Activator.CreateInstance(System.Type)$##6000746+0xc
571 00000008`e57fe680 00007ffe`6145650c Microsoft_Windows_ServerManager_Common_ni!Microsoft.Windows.ServerManager.Common.Plugin.ReflectionRolePluginFactory+<>c__DisplayClass0_0`1[System.__Canon].b__0()$##6001B35+0x16
572 00000008`e57fe6c0 00007ffe`61456128 mscorlib_ni!System.Lazy`1[System.__Canon].CreateValue()$##6000F19+0xec
573 00000008`e57fe720 00007ffe`5830c51c mscorlib_ni!System.Lazy`1[System.__Canon].LazyInitValue()$##6000F18+0xb8
574 00000008`e57fe790 00007ffe`628a6a93 Microsoft_Windows_ServerManager_Common_ni!Microsoft.Windows.ServerManager.Common.Plugin.PluginLoader`1[System.__Canon].InitializePluginWorker(Microsoft.Windows.ServerManager.Common.Plugin.RolePluginRegistrationInfo, System.Object, System.ComponentModel.AsyncOperation)$##6000453+0x9c
575 00000008`e57fe810 00007ffe`628a6948 clr!CallDescrWorkerInternal+0x83
576 00000008`e57fe850 00007ffe`62a51efd clr!CallDescrWorkerWithHandler+0x4e
577 00000008`e57fe890 00007ffe`62a51a3f clr!CallDescrWithObjectArray+0x6b5
578 00000008`e57feb10 00007ffe`61e93574 clr!CStackBuilderSink::PrivateProcessMessage+0x26d
579 00000008`e57fefb0 00007ffe`61475ab3 mscorlib_ni!System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage, System.Runtime.Remoting.Messaging.IMessageSink)$##6005B31+0x1b4
57a 00000008`e57ff050 00007ffe`61475944 mscorlib_ni!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)$##6003AD4+0x163
57b 00000008`e57ff120 00007ffe`614b5b43 mscorlib_ni!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)$##6003AD3+0x14
57c 00000008`e57ff150 00007ffe`614b4e22 mscorlib_ni!System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()$##6003CAC+0x73
57d 00000008`e57ff190 00007ffe`628a6a93 mscorlib_ni!System.Threading.ThreadPoolWorkQueue.Dispatch()$##6003C8B+0x152
57e 00000008`e57ff230 00007ffe`628a6948 clr!CallDescrWorkerInternal+0x83
57f 00000008`e57ff270 00007ffe`628a720d clr!CallDescrWorkerWithHandler+0x4e
580 00000008`e57ff2b0 00007ffe`628abfc9 clr!MethodDescCallSite::CallTargetWorker+0xf8
581 00000008`e57ff3b0 00007ffe`628a79d1 clr!QueueUserWorkItemManagedCallback+0x2a
582 00000008`e57ff4a0 00007ffe`628a7940 clr!ManagedThreadBase_DispatchInner+0x39
583 00000008`e57ff4e0 00007ffe`628a787d clr!ManagedThreadBase_DispatchMiddle+0x6c
584 00000008`e57ff5e0 00007ffe`628a7a0f clr!ManagedThreadBase_DispatchOuter+0x75
585 00000008`e57ff670 00007ffe`628abf30 clr!ManagedThreadBase_FullTransitionWithAD+0x2f
586 00000008`e57ff6d0 00007ffe`628a804c clr!ManagedPerAppDomainTPCount::DispatchWorkItem+0xa0
587 00000008`e57ff850 00007ffe`628a7df5 clr!ThreadpoolMgr::ExecuteWorkRequest+0x64
588 00000008`e57ff880 00007ffe`628ac1cf clr!ThreadpoolMgr::WorkerThreadStart+0xf5
589 00000008`e57ff920 00007ffe`7ccc84d4 clr!Thread::intermediateThreadProc+0x86
58a 00000008`e57ffc60 00007ffe`7f08e8b1 kernel32!BaseThreadInitThunk+0x14
58b 00000008`e57ffc90 00000000`00000000 ntdll!RtlUserThreadStart+0x21

I think issue did appeared after install new updates for .Net/C#

How I can rebuild assemblies for HyperV plugin in ServerManager ? 

Is it possible to do some kind of cleanup, and get a chance of stable execution for ServerManager ?

Sergey Pachkov

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CSV failed to chnage owner

I have 3 node of Hyper-V Cluster and 2 CSV.
I have a problem to owner change CSV.
My symtoms like below.

1. Takes move CSV owner to 2 and 3 node from node1 : fail (get back to owner node 1)
2. Turn-off node1, and then 2 and 3 node successfully changed CSV owner.

Can I setting priority value of CSV owner each node?
What should I check about this symtoms?

Please advise for me.


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Hyper V – Exchange server status wrong

In the hyper V manager the Exchange server hosted on a VM reads the status as Turning off…

The server has been read this for a days now and has not shut down and is continuing to run as normal. Why would the status read this if it is not shutting down.

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