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Exploring DHCP Changes in Windows Server 2012 : Migrating DHCP Servers Using Windows Server Migration Tools

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12/8/2014 8:33:21 PM

The Windows Server 2012 DHCP server service has added some new improvements to its features. One of the biggest improvements is the new DHCP failover functionality that allows synchronization of DHCP leases and scope information between servers. Before you can enable that functionality, however, DHCP server roles must be deployed on multiple systems, and at least one of these systems must already have a DHCP scope defined.

On most networks, before this new DHCP feature can be leveraged, existing DHCP servers and their scopes must be migrated/decommissioned. The following section details the migration options available for DHCP migration using the Windows Server 2012 Migration Tools.

Migrating DHCP Servers Using Windows Server Migration Tools

The Windows Server 2012 Window Server Migration Tools are a set of tools designed to aid administrators with the migration of not only DHCP scope information, but also the current leases, reservations, and scope options.

Installing the Windows Server Migration Tools on Windows Server 2012

Before the migration tools can be leveraged, they must be installed on all the source and destination servers. Because the tools are included with Windows Server 2012, they must first be installed on Windows Server 2012, and then a special deployment folder package must be created to support installation on down-level operating systems. To install migration tools on a Windows Server 2012 system, follow these steps:

1. Log on to the proposed Windows Server 2012 system and click the Server Manager tile on the taskbar.

2. When the Server Manager console opens, on the Welcome to Server Manager page, click Add Roles in the center.

3. On the Before You Begin page, in the Add Roles and Features Wizard, click Next to continue.

4. On the Select Installation Type page, select the Role-Based or Feature-Based Installation radio button, and then click Next to continue.

5. On the Select Destination Server page, select the Select a Server from the Server Pool radio button and select the local server in the window. Click Next to continue.

6. On the Select Server Roles page, leave the defaults and click Next to continue.

7. On the Select Features page, scroll down to Windows Server Migration Tools Features group and check the box, and then click Next, as shown in Figure 1.

Image

Figure 1. Installing the Windows Server migration tools.

8. On the Confirm Installation Selections page, click Install to begin the installation. If a reboot is required, you are prompted after the installation completes. Reboot as required.

9. On the Installation Progress page, you can monitor the installation progress. Click Close when the installation completes.

Creating the Deployment Folder Package of the Windows Server Migration Tools for Down-Level Operating System Installation

Before the Windows Server migration tools can be used to migrate DHCP services from older operating systems to Windows Server 2012, the tools must be installed on the down-level operating systems. For the Windows Server 2012 migration tools, this includes Windows Server 2008 R2, Windows Server 2008, and Windows Server 2003. The process is mostly the same for all versions and includes two steps: creating the deployment folder package and then installing that package on the down-level system. To create the deployment folder package for a Windows Server 2008 R2 x64 system, follow these steps:

1. On the Windows Server 2012 system with the Windows Server migration tools installed, open an elevated PowerShell console session.

2. Change directories to C:\Windows\System32\ServerMigrationTools, assuming that the C: drive is the system drive.

3. Type the command .\SmigDeploy.exe /package /architecture amd64 /OS WS08R2 /path C:\MigTools and press Enter to create the package.

4. After the package is created, you should have a C:\MigTools\SMT_WS08R2_amd64 folder created. You can repeat the previous command for Windows Server 2008 and Server 2003 for both 32- and 64-bit editions as required. Close the command prompt.

This completes the creation of the down-level deployment folder package.

Installing the Windows Server Migration Tools on Windows Server 2008 R2 64-Bit Edition DHCP Server

Once the deployment folder package has been created, you can copy it over to the destination server and install it. To install the deployment package on a Windows Server 2008 R2 DHCP server, follow these steps:

1. Copy the C:\MigTools\SMT_ws08R2_amd64 folder from the Windows Server 2012 system to the C:\MigTools folder on the destination Windows Server 2008 R2 server. Create the C:\MigTools folder as required or select another desired destination folder.

2. Once the folder is copied over, open an elevated PowerShell console session and change the directory to C:\MigTools\SMT_ws08R2_amd64.

3. Type SmigDeploy.exe and press Enter to register and install the tools. If Windows PowerShell is not installed, this process fails, and the PowerShell feature must be installed before this process can continue.

4. When the process completes, both the original PowerShell console session and a new PowerShell window are open. Type Exit and press Enter in both windows to close them.

This completes the registration and installation of the Windows Server migration tools on a Windows Server 2008 R2 system. This process is the same for both Windows Server 2008 and 2003, including the prerequisite of Windows PowerShell for installation and operation.

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