GlobalNames Zone Configuration Facts
The GlobalNames zone is a special zone in the DNS database that is used for single-label name resolution. Use the GlobalNames zone to:
- Allow clients to use simple host names without domain information for name resolution. For example, to contact a server named web1.corp.us.westsim.private, users could simply enter the single-label name web1.
- Allow DNS clients to contact NetBIOS-only hosts without the need for a WINS server.
- Allow IPv6-only hosts to contact NetBIOS hosts (IPv6 does not support the use of WINS).
- Replace WINS servers on your network when you have a small number of hosts that do not support DNS. For a large number of NetBIOS-only hosts, or to support dynamic registration of single-label names, continue to use a WINS server.
Be aware of the following when managing the GlobalNames zone:
- If you use the GlobalNames zone, all authoritative DNS servers must run Windows Server 2008. Servers that are not authoritative can run any operating system.
- To configure the GlobalNames zone:
- Delete any zones that are currently named GlobalNames.
- Run the dnscmd <servername> /config /enableglobalnamessupport 1 command to enable support for GlobalNames zones. You must run this command on every server that hosts a GlobalNames zone.
- Create a zone on the DNS server named GlobalNames.
- Create CNAME records in the GlobalNames zone that point to A records in other zones. Note: Dynamic updates are not supported on the GlobalNames zone. You must manually create each record in the GlobalNames zone.
- Microsoft recommends that the GlobalNames zone be an Active Directory-integrated zone.
- Within the GlobalNames zone, all names must be globally unique (throughout the entire organization). The GlobalNames zone has a forest-wide replication scope to ensure that single-label names are unique across the forest.
- You can extend the GlobalNames zone to multiple forests by using the SRV (service locator) resource record to publish the location of the GlobalNames zone. Active Directory-integration is required when deploying the GlobalNames zone across forests.
- Using the GlobalNames zone does not require any changes to client machines.