Microsoft Windows NT 4.0 Guide Bedienungsanleitung PDF herunterladen (Seite 73)

Microsoft

Windows Server

™

2003 White Paper

Windows NT 4.0 Server Upgrade Guide 68

Forest Functional Level

During the upgrade process, the Active Directory installation wizard asks the installer to set the

forest functional level. This setting is used to tell Active Directory how much backward

compatibility to provide for other domain controllers. It is similar to the Windows 2000 mixed vs.

native mode backward compatibility setting.

Figure 28. Choosing the forest functional level

The forest functional level allows an administrator to choose backwards compatibility with both

Windows 2000 and Windows NT 4.0. The various options allow for fine-tuning the compatibility

level by providing support for Windows 2000 domain controllers, Windows NT 4.0 domain

controllers, or both simultaneously. Because this installation uses only Windows NT 4.0 domain

controllers and no Windows 2000 domain controllers, the default option of Windows Server 2003

interim should be chosen.

DNS

Another issue that arises during the upgrade of the Windows NT 4.0 PDC to a Windows Server

2003 domain controller is DNS. The Active Directory installation wizard looks for a DNS server. If

one is not found, the wizard prompts the user either to ignore the message and fix the problem

after the install, install and configure a DNS server at that time, or allow the wizard to retest the

connection to the DNS server. If this issue is not fixed during the installation, Active Directory does

not function properly after the installation is complete.

Although not completely necessary, it is a good idea to use Microsoft DNS servers for Active

Directory. Microsoft DNS supports all the necessary DNS services, such as SRV records and

dynamic updates, required to run Active Directory efficiently. Various versions of BIND also offer

enough support for Active Directory but don’t offer Active Directory–integrated DNS. Active

Directory integration offers the following benefits:

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Microsoft Windows NT 4.0 Guide Bedienungsanleitung Seite 73