Adding a Cross-Forest GlobalNames Zone
Applies To: Windows Server 2008
You can use this task to create a GlobalNames zone to maintain a set of single-label Domain Name System (DNS) names that can be resolved by Windows Server 2008 DNS servers on behalf of DNS clients throughout multiple Active Directory Domain Services (AD DS) forests. See Providing Single-Label DNS Name Resolution for information about deploying a GlobalNames zone.
Deploying a GlobalNames zone in multiples forest requires you to perform the following steps:
Create a zone named GlobalNames that is replicated to all domain controllers in one forest.
Add an alias (CNAME) record to the zone for each host for which you want to provide single-label name resolution. For example, if you want DNS clients to be able to access a server whose fully qualified domain name is cweb.itgroup.contoso.com, you would add a CNAME record that maps the name cweb to cweb.igroup.contoso.com.
Add a service locator (SRV) resource record to the zone corresponding to the forest-wide _msdcs zone of the other forests.
To complete this task, perform the following procedures: