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Hyper-V

January 3, 2019, 6:32 am
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Hi all, I have the following scenario:
3 node cluster Hyper-V with Windows 2016 DTC edition with CSV configured, the three node access to storage by iSCSI. On the cluster I have installed a traditional SQL Cluster with shared disks and other standalone VMs. If a fail occure on the network interface the VMs continue to run normally but the two node of SQL cluster crash and the only solution to restore the situation is to remove the shared disks, add they again and restart the two node.

Do you have some idea?
Thank you very much
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Network connection lost after exposing virtualization extensions on VM

January 3, 2019, 12:38 pm
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Hi,

I have a VM managed by Hyper-V on Windows Server 2016 and I'm trying to enable nested virtualization for this VM. I followed the instructions on https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/user-guide/nested-virtualization. However, once the nested virtualization is enabled the VM loses its network connection even when MAC spoofing is enabled.

Does anyone have any ideas about what could be causing the network connection to be lost?

Thanks,

Naveen Jones


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Integration Services For Debian

January 4, 2019, 9:11 am
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Hi,

I installed Debian on Windows Server 2012 R2 Hyper-v. I could not find suitable integration service for Debian. 

I tried "Linux Integration Services v4.2 for Hyper-V" but it does not support Debian.

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how to setup 2 way connectivity between hyper-v linux(centos) guest and host windows machine with internet in both

January 5, 2019, 1:02 pm
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My laptop only has a wireless network card. I have created CentOS VM on hyper-v. I need to setup few server applications on that centOS vm and those will be communicating with the application running on my windows host eclipse(my development environment). 

If i used the external virtual switch, i get internet on both but loose the 2 way connectivity. so i thought of trying the internal switch, but with that I am now not even able to get the network initialized(no IPV4 initialization)


λ ipconfig /all

Windows IP Configuration
   Host Name . . . . . . . . . . . . : DESKTOP-7L5NIMS
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter vEthernet (Default Switch):

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter
   Physical Address. . . . . . . . . : 82-15-2E-69-35-02
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::8851:a485:5bc:a780%40(Preferred)
   IPv4 Address. . . . . . . . . . . : 172.22.224.113(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.240
   Default Gateway . . . . . . . . . :
   DHCPv6 IAID . . . . . . . . . . . : 671094109
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-42-19-56-10-02-B5-56-86-E1
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter vEthernet (raj-hyper-switch):

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2
   Physical Address. . . . . . . . . : 10-02-B5-56-86-E1
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter VirtualBox Host-Only Network #3:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter #3
   Physical Address. . . . . . . . . : 0A-00-27-00-00-0F
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::f0bb:87e0:1b33:d84c%15(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.56.1(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :
   DHCPv6 IAID . . . . . . . . . . . : 772407335
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-42-19-56-10-02-B5-56-86-E1
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Local Area Connection* 15:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #5
   Physical Address. . . . . . . . . : 10-02-B5-56-86-E2
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Local Area Connection* 16:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #6
   Physical Address. . . . . . . . . : 12-02-B5-56-86-E1
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter VMware Network Adapter VMnet1:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet1
   Physical Address. . . . . . . . . : 00-50-56-C0-00-01
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::7984:576d:813c:bbaa%24(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.102.1(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, January 5, 2019 2:28:23 PM
   Lease Expires . . . . . . . . . . : Sunday, January 6, 2019 2:28:27 AM
   Default Gateway . . . . . . . . . :
   DHCP Server . . . . . . . . . . . : 192.168.102.254
   DHCPv6 IAID . . . . . . . . . . . : 285233238
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-42-19-56-10-02-B5-56-86-E1
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter VMware Network Adapter VMnet8:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet8
   Physical Address. . . . . . . . . : 00-50-56-C0-00-08
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::dc3b:65bc:e953:729c%28(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.109.1(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, January 5, 2019 2:28:23 PM
   Lease Expires . . . . . . . . . . : Sunday, January 6, 2019 2:28:27 AM
   Default Gateway . . . . . . . . . :
   DHCP Server . . . . . . . . . . . : 192.168.109.254
   DHCPv6 IAID . . . . . . . . . . . : 335564886
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-42-19-56-10-02-B5-56-86-E1
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   Primary WINS Server . . . . . . . : 192.168.109.2
   NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wi-Fi:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 7265
   Physical Address. . . . . . . . . : 10-02-B5-56-86-E1
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::c432:8d97:4943:8a71%5(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, January 5, 2019 11:49:26 PM
   Lease Expires . . . . . . . . . . : Monday, January 7, 2019 2:00:00 AM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 84935349
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-42-19-56-10-02-B5-56-86-E1
   DNS Servers . . . . . . . . . . . : 192.168.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
   Physical Address. . . . . . . . . : 10-02-B5-56-86-E5
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

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I have a hyper-V CentOS(7.7.1810) guest, but not able to see that in full screen

January 5, 2019, 1:06 pm
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Hi,

I have a hyper-V CentOS(7.7.1810) guest, but not able to see that in full screen. What am i missing ? 

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HyperV Virtual corrupted

January 6, 2019, 4:12 am
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Dears all,

I have a win server 2012 R2 hosting backup domain controller on a virtual machine, suddenly we came last week and we found the virtual machine unable to boot the win server, we have tried to do all possible suggestion from the internet without luck.

kindly note that we don't have any snapshots or backup for the virtual machine,

is there any tool to fix this issue? or in such cases what we must to do?

Thank you,

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Remote Management of Hyper-V on Server Core 2016

January 6, 2019, 4:53 am
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Good Morning,

I have a small home environment consisting of some Windows 10 workstations (and a Windows 7 machine) and a Hyper-V host. The Hyper-V host runs Windows Server 2016 Standard (Server Core) and has a Windows Server 2016 Standard (Server Core) VM, configured with AD as a PDC, DNS and File Services server. I additionally have various *nix VM's running unrelated services. The Hyper-V host is also a domain member.

The problem I am having is that I cannot remotely manage the Hyper-V host. Server Manager displays "Online - Access Denied", whilst Hyper-V Manager gives an incorrect username/password error. In both instances, I am logged in with my domain account, which is a member of both "Domain Admins" and "Hyper-V Administrators". Additionally, I have added my domain account to the local administrators group on the Hyper-V host (as a test, though this should not be necessary).

My domain credentials work on my other machines on the network, and I can also log into the Hyper-V host physically with them.

I have tried removing the Hyper-V host from the domain and re-adding it, to no avail.

I have been reading the documentation online and it seems that for a Hyper-V host to be managed on a domain, one needs only login with a domain administrator account. Does anybody have any experience of a similar situation?

Best regards,

Jack
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Server 2008 R2 VM on Server 2016 Hyper-V

January 6, 2019, 8:09 pm
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Due to capacity issues, I recently had to upgrade some Windows 2008 R2 Terminal Servers. The replacement servers do not support Server 2008 R2 so here is what i am trying to do. I want to load Windows server 2016 on the new servers as the base OS and then convert the old windows 2008 R2 terminal servers to VM's and run them under hyper-v on windows 2016.

I am able to do all of this and the 2008 R2 VM's run fine on server 2016 hyper-v. They are seen on the network and operate fine. the problem is when a thin client tries to connect, It will not connect to the 2008 R2 VM running on Server 2016. The Terminal server license server is on the domain controller which is a windows server 2008 R2 as well. I can rdp to the 2016 server and to the server 2008 R2 VM no issues. It is just when i try with the thin clients they will not connect. They will still connect to any of the other server 2008 R2 terminal servers still running stand alone. I think it is some sort of licensing issue. I know we are going to have to upgrade the licenses but there are 20+ servers that need upgrading this year so i want to plan it all out first, budget for it and then start the process. The only reason i am doing this now is that i need more seats for thin clients today. We are about to hire 20-30 more staff and we are just about maxed out in capacity on the existing servers. This was meant to be a short term solution until we upgrade the whole environment later this year.

Any input would be helpful

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Hyper-V Manager cannot connect to remote machine

January 6, 2019, 11:16 pm
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I have 3 Windows 2008 R2 servers running Hyper-V and Hyper-V Manager.

Hyper-V Manager running on two servers can collect to all servers.

One the other server, Hyper-V manager gives message "Cannot connect to the RPC service on computer 'xxx'. Make sure RPC service is running."

What is the fix for this problem?

Larry

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Hyper -V save button functions improper

January 7, 2019, 1:39 am
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Hello When I use the save functionality of Hyper -V. It shows my content is saved but when I try to reconnect my VM. It takes lot of time and eventually fails to connect. Does this related to some misconfigurations. Please suggest. 

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Hyper-V Extremely slow performance in SQL Server connect

January 7, 2019, 4:13 am
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We are planning to migrate from a physical machine to Hyper-V structure.

In our Hyper-V environment test, we get, in simple queries, better (or almost the same) response time than in physical machine.

But, in more sophisticate forms, the performance decreases about 10 times. For example: in physical machine the response time is less than 2" versus 22" in VM.

Could you help me, please?

Here are the details:

1. Isolated VBA code:

WkConnectionString= "Provider=SQLOLEDB;Data Source=INSTANCENAME;Initial Catalog=DBNAME;User ID=USERID;Password=XXXXX;"

For WkI = 1 To 20
    Set CnConexioDBNAME = New ADODB.Connection
    CnConexioDBNAME.Open WkConnectionString
    CnConexioDBNAME.Close
    Set CnConexioDBNAME = Nothing
Next WkI
** This code takes less than 2" to answer when runs in physical machine and 22" in VM

2. MsAccess forms:
   - The more sophisticated ones,  have 12 Combo Box with a pass-trough query as data source in every one.
   - Plus, three sub forms.

3. Languages and OS:

   - Forms developed in MsAccess 2013 (x86) with VBA.

   - SQL Server 2014 (SP3) (x64)

   - Installed in Windows Server 2012 R2 Standard (in the Physical machine)
      - DELL. 16Gb RAM. 2.4Ghz (2 processors). x64.

   - Installed in Windows Server 2016 Standard (in the Hyper-V VM)
      - DELL. 8Gb RAM, 1.7Gh, SSD. x64

   - Microsoft ODBC Driver 13 for SQL Server (x86)

3. Hyper-V VM (hyperv-2016 core)

   - VHDX on SSD  
   - Virtual machine Switch external
   - Generation 2.
   - Configuration 8.0

4. Clients

  - When accessing from W7 or WServer 2008 to the VM, the response time is 8"
  - When accessing form W10 or WServer 2012 to the VM, the response time is 22"
  - However, in both cases, when accessing to the physical machine, the response time is less than 2"

5. Hardware

   - NIC Intel i350,i210, broadcom netxtreme
   - VMQ: Disabled
   - BIOS: saving energy :  High Performance power plan

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Hyper V manager missing VM after SAN volume move

January 8, 2019, 2:06 am
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Hi,

Have a 2012r2 Hyper V cluster and 2 Nimble SAN array.

What i did:

1. Shutdown VM
2. Offline the CSV volume
3. Did a Nimble handover of the volume belong to the VM. Worked fine.
4. Attached the iSCSI drive again from Nimble NCM manager on all Hyper V servers
5. Verified i can see the volume and files and the volume has the same volume number in CSV
6. VM machine showed up fine in Failover CLuster manager
7. VM machine is now missing in Hyper V Manager
8. Had to import the VM machine config files and vDisk
9. VM machine boot up fine.

Question: Why are the VM missing from Hyper V manager when the CSV has been offline?

Regards
Robert

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Hyper-V Server 2012 R2 - Best Practice for Backup/Replication

January 8, 2019, 6:08 am
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Hi Guys,

i'm looking for some advice please.

We have 2 x host servers (A+B).

Both hosts have 6.54TB of total size.

Host B only has 1 live SQL Server VM which is not replicated but is receiving 2 VM Replicas.

SQL Server VM has a total size of 2.13TB of VHDX

Total disk cost of all VMs on HOST B leaves this host with around 1.71TB free.

Windows Server Backup runs from 6PM to 3AM and is running a full backup each time.

I believe that during this time the differencing disks are using up all the free space which is putting my running VM in to a saved state and does not recover automatically.

On top of this I am unable to have replication for the SQL VM because of the similar symptoms caused by WSB. The differencing disks werent clearing out.

Is there something I can do to get WSB to do incremental backups of these VHDXs files or is this expected to have to back up the full VHDX each time on a SQL VM?

Do you think I should replicate to Host A and back up host A instead?

Or, do I need to increase my disk capacity?

I must add that Host A running the two live VMs is having no issues with backup or replication. My issue is the SQL VM only.

thanks!

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SET Embedded Teaming & Hyper-V External switch

January 8, 2019, 7:32 am
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Is it just a cosmetic issue or I selected (and now cannot change) the adapter wrongly?

It is no longer possible to change it (and sure I would want it to be connected to SET team & not a single adapter)

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Replication Stand Alone to Cluster

January 8, 2019, 7:33 am
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Is this possible to replicate standalone Hyper-V Host to Cluster environment?

I have standalone Hyper-V in Domain "A" and Cluster in Domain "B" i want to replicate it. I know i need to use certificates i done this before. 

I have different domain "C" with 2 Hyper-V Host and its working as extended replica. In Domain "A" i have only one Hyper-V Host so extended replica its not possible.

How it looks: https://ibb.co/ryWStVg

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A question about Hyper-V networking

January 8, 2019, 8:12 am
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Hello to ALL,

I am preparing to pass a Windows 2016 exam and I am preparing to not to fail :) I found a PDF file with sample questions/answers and I tried to solve this puzzle with our CCNE without any luck :) Please, help me to understand how it works..



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Thick / Thin and UNMAP

January 8, 2019, 10:15 am
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Hi

We're running 2012R2 (moving to 2016 soon) and experiencing some issues with UNMAP. We already discovered that with deleting large files on thin disks on thin LUNs, we see a freeze of the VM for a few seconds. Disabling UNMAP inside the VM or provisioning the VHDX as thick, will solve the issue.

But one question remains, which we can't test right now because of time constraints, will a thin VHDX on thick CSV also trigger UNMAP? 

Can anyone maybe answer this?

Gabrie

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How to increase network IO for Hyper-V host

January 9, 2019, 12:43 am
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Is there any way to increase network IO performance for Hyper-V host? like the tcpip data window setting in windows register.
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Can Server 2019 Hyper-V Core be used?

January 9, 2019, 2:09 am
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we want to build our new cluster with Server 2019. Is it possible to use the following ISO or has not the Hyper-V core version been officially released yet?
17763.1.180914-1434.rs5_release_SERVERHYPERCORE_OEM_x64FRE_en-us.iso
In our VLSC I could only find Datacenter, Standard and Essential.

I know of an RDP problem with the Hyper-V Core. We could live without RDP because we mainly work through Remote Powershell

What I have seen when testing is that no Monthly updates are displayed in the update search on sconfig. I had to install this manual. Is this normal?

Best Regards,
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Networking issue / question

January 9, 2019, 4:56 am
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Have been fighting this for awhile and it was working for awhile, but something seems to have changed so back to the drawing board.

Running Hyper-V on my Laptop, to run labs and test environments, and run into a lot of network issues where I do not get good connection on the VM or lose network connection on my laptop when the VMs are turned on.

Goal I am setting up is multiple VMs using internal switches, and a router vm running PFSense that handles the routing.  For the router VM I figure the best option would be to use the Default Switch for the WAN adapter.

From reading I have heard of issues and needs to disable the "Intel Access Filter driver" check box on the virtual adapters that created on the laptop, but not sure if this has truly helped or not, it seemed to, but being I am again seeing network drops I figure I need to configure something differently.

The reason for the PFSense router, is I am setting up a full environment of VMs (AD, SCCM, client machines), and it handles DHCP for me for the VMs and handles the routing for network boot and all that.

Anybody seen this issue where network constantly drops or gets very slow when setting up VMs, and are there any tips for best way to setup the network connections to avoid this problem when using Hyper V on mostly Wifi.

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