Active Directory 2008: GlobalNames Zone Configuration Facts…

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:
    1. Delete any zones that are currently named     GlobalNames.
    2. 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.
    3. Create a zone on the DNS server named GlobalNames.
    4. 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.
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