15.16. Finding the Closest Domain Controller
You want to find the closest domain controller for a particular domain.
Using a command-line interface
The following command finds the closest domain controller in the specified domain
<DomainDNSName>). By default, it
will return the DC closest to the computer
nltest is being run from, but you can
optionally use the
to target a remote computer. You can also optionally specify the
/site option to find a domain
controller that belongs to a particular site.
> nltest /dsgetdc:
' This code finds the closest domain controller in the domain ' that the computer running the script is in. ' ------ SCRIPT CONFIGURATION ------ strDomain = "
<DomainDNSName>" ' e.g., emea.rallencorp.com ' ------ END CONFIGURATION --------- set objIadsTools = CreateObject("IADsTools.DCFunctions") objIadsTools.DsGetDcName( Cstr(strDomain) ) Wscript.Echo "DC: " & objIadsTools.DCName Wscript.Echo "DC Site: " & objIadsTools.DCSiteName Wscript.Echo "Client Site: " & objIadsTools.ClientSiteName
The DC locator process as described in MS KB 314861 and MS KB 247811 defines how clients find the closest domain controller. The process uses the site topology stored in Active Directory to calculate the site where a particular client is. After the client site has been identified, it is a matter of finding a domain controller that is either a member of that same site or that ...