Author: Aldin Taamneh Page 1 of 2

Windows 10 is Stealing your Internet Bandwidth

The feature, known as Windows Update Delivery Optimization (WUDO), is initially designed to help users get faster software updates, which is quite a good idea to handle massive internet traffic of up to 40 Terabits per second (TBps).
WUDO works a lot like torrents work. Your computer running Windows 10 is used as part of a peer-to-peer network to deliver software updates faster to others, each person distributing a little bit of the files across multiple computers and helping everyone download updates quickly.
But, this peer-to-peer sharing method offered by Windows 10 is using your precious Internet bandwidth, without hinting you about it, because the feature is enabled by default in Windows 10 Home and Pro edition. WUDO is also enabled in Windows 10 Enterprise and Education, but only for the local network.

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SCOM 2016 Management Packs for Windows Server 2016

So, here is the list of updated MP’s for Windows Server 2016, not all seems to be done but Kevin Holman has a nice list with URL’s for those that have been released so far.

Check this site for more info:

https://blogs.technet.microsoft.com/kevinholman/2016/12/19/where-are-the-server-2016-management-packs/

VLAN, Trunk, NIC Teaming, Virtual Switch Configuration in Hyper-v Server

If you checked my posts before and especially LAB scenarios maybe you noticed I didn’t tag VLANs and reason is I didn’t want to complicate things and I know that some people have problem with understanding how it all works in comparison with physical switches and all. This post is meant to help clear that and I hope it will help in better understanding of Hyper-V Virtual Switch.

Network virtualization provides multiple virtual network infrastructures run on the same physical network with or without overlapping IP addresses. Each virtual network infrastructure operates as if they are the only virtual network running on the shared network infrastructure. Hyper-v Network Virtualization also decouples physical network from virtual network.

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How to Migrate configured DHCP from Windows Server 2008R2 to Server 2016

Here’s how  you do it:

  • Log on to the old/existing DHCP server.
  • Click Start, click Run, type cmd in the Open box, right-click, and then “Run as Administrator”.
  • On the Action menu, click Backup.
  • Type

    and then press ENTER.
  • Install the DHCP role on the new (2016) DHCP server using Server Manager.
  • Copy the exported DHCP text file to the desktop of the new DHCP server.
  • Verify that the DHCP service is installed and started on the new DHCP server.
  • Click Start, click Run, type cmd in the Open box, right-click, and then “Run as Administrator”.
  • Type

    and then press ENTER
  • Open DHCP console on the new server.
  • In the console tree, right-click DHCP.
  • Select “Authorize”.

If your old DHCP server is in the same network/subnet as the new DHCP server, you’ll notice that the old DHCP server has been de-authorized automatically. This is to prevent two DHCP servers from handing out conflicting addresses.

Check to make sure that your new DHCP has all of the same settings, options, scopes, and reservations set as the current one. If done correctly, everything should have been brought over.

Easy right 🙂

Nested Virtualized Windows Server 2016 Hyper-V Cluster LAB – Scenario 2

This Scenario will be lot quicker and we will be using PowerShell since Nano Server is without GUI and it will definitely reflect on footprint and size of cluster.

I recommend you read Nano Server – Deployment since I will be using that procedure for creating script that will automate creation of Nano Servers.

In this scenario we will have 3 VMs and first one same as in Scenario 1 will be VM with our Domain Controler, DHCP, DNS and we will need to setup all those services on that VM(detailed info on this procedure). This time we will also need to install Failover Cluster Manager so we can manage Nano servers since they don’t have any GUI. Second and Third will be our Nano Servers that we will create with script below but before we do it we need to mount Windows Server 2016 ISO  and copy NanoServer folder to our C: drive.

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Nested Virtualized Windows Server 2016 Hyper-V Cluster LAB – Scenario 1

On Hyper V in Windows 10 we will create 4 VMs as we planned before and after VMs are created we must enable nested virtualization for our future cluster nodes.

After that we need to install Windows Server 2016 and I suggest we use VM template for faster deployment as described in post earlier. Do not forget to enable MAC address spoofing in order for network packets to be routed through two virtual switches, MAC address spoofing must be enabled on the first level of virtual switch.

First VM will be our Domain Controler, DHCP, DNS and we need to setup all those services (detailed info on this procedure). Second VM will be our SAN VM and for this we will use StarWind Virtual SAN. Third and Fourth Server will be our future Hyper V host cluster nodes and for time being they must be joined to domain and given appropriate names and IP addresses.
Network interfaces on cluster nodes will be configured later with PowerShell script since I elected to team all 4 NICs using the minimum bandwidth setting for Management, Cluster, ISCSI, VM, and LiveMigration traffic.  I highly recommend that you take a few moments to watch John Savill’s discussion on this method of teaming: Using NIC Teaming and a virtual switch for Windows Server 2012 host networking

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Hyper Converged

Hyper Converged infrastructure is based on servers where disks are Direct-Attached Storage (DAS) connected internally or by using a JBOD tray. Each server (at least four to implement Storage Space Direct) has their own storage devices. So there are no shared disks or JBODs.

Hyper Converged infrastructure is based on known features as Failover Cluster, Cluster Shared Volume, and Storage Space. However, because storage devices are not shared between each node, we need something more to create a Clustered Storage Space with DAS devices. This is called Storage Space Direct. Below you can find the Storage Spaces Direct stack.

On network side, Storage Space Direct leverage at least 10G networks RDMA capable. This is because replications that occur though Software Storage Bus need low latency that RDMA provides.

More on this link: https://technet.microsoft.com/en-us/windows-server-docs/storage/storage-spaces/storage-spaces-direct-overview?f=255&MSPPError=-2147217396

Nested Virtualized Windows Server 2016 Hyper-V Cluster LAB

Prior to deployment on production I wanted to test new Windows Server 2016 Hyper V Cluster. On paper it seems it didn’t change much from Windows Server 2012 R2 but still there is fear of unknown. My goal was to test all of it on my desktop workstation since it is quite good even after 3 years of service it is still capable of doing some serious business. Main new feature that will enable me to do this is called Nested Virtualization.

Well now after everything I must say I am impressed what I was capable to achieve and this will be series of articles and step by step instructions if you are interested in doing similar setup at your home or just part of it for fun.

First things comes first 🙂

In all possible scenarios planing and preparation is half work done right there, because of that we need detail plan of our future Hyper V cluster environment and all of it parts and envision our test case.

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Windows Server 2016 Updates

Well after quite a few deployments of new Server I noticed that Windows update will throw warring and notification “Your device is scheduled to restart outside of active hours” even do you set it not to do so – it is set do DownloadOnly.

It seems that this is a known bug in the Windows Update Settings UI in which the text does not correctly reflect the configuration of your Windows Update settings. MS Server Team will make fix soon but for now if you don’t want your server to automatically restart this is what you need to check and configure :

Validate your current Update settings using SCONFIG

To determine what updates your machine has already installed, follow these steps:

  • Open a command prompt with Admin permissions.
  • Type sconfig and press Enter.
    • NOTE: There may be a short pause as the tool inspects your system.
  • Option #5 shows the current configuration of your Windows Update settings.

     

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Add Nano Server to Domain

This is procedure how to add Nano Server to domain. Basic idea behind this is to do offline join to domain. Before you venture to adding Nano Server to domain you must set network address and adequate DNS record on your DNS server.

Nano server is a headless server which you cant RDP or not a command prompt. For Nano Server management we have to use PowerShell or RSAT tools. So as a first step is to login to other server which stays in the same network and run the PowerShell and execute the following commands.

First add the server to TrustedHost List

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