How to know the which domain contraoller is the primary domain controller.

Posted on 2006-04-05
Last Modified: 2011-08-18
We have parent and child  domain with windows 2003 servers.How can I know  which is the primary domain controller on the parent and the child domain.Secondly does the child domain needs to have all the 5 FSMO roles.Also I want to know if there is a comand line utility from which I can find which role is performed by which server.
Question by:life_j
    LVL 74

    Assisted Solution

    by:Jeffrey Kane - TechSoEasy will show you how to check.  You'll find info on NTDSUTIL in that KB which is the command line util.

    Then, this is a good overview so you can plan your AD correctly:


    LVL 48

    Assisted Solution

    Hi life_j,

    if you havent ever moved to FSMO roles around then the first Domain Controller in each Domain will be the "primary" Domain controller as a rule of thumb..... otherwise Jeff's Links will help you find out

    windows Server OS's dont have a "primary" DC as such though, if youhave multiple DC's in a domain then automitic Load balancing will control where abouts a user logs on to and if a multiple site Domain is in place then Sites and Services subnet config will help to control which DC is used

    LVL 51

    Accepted Solution

    There are 2 Forest-wide FSMO roles and 3 domain-wide FSMO roles.  The root DC of the Forest will hold the Schema and the Domain Naming Masters - they ONLY exist in the forest root.

    The other 3 roles will exist in EACH domain - including the root:

    PDC Emulator
    RID Master
    Infrastructure Master

    The ONLY time that the Infrastructure Master must not be co-located on a Global Catalog server is when there is more than one (1) domain in the Forest.

    Hope this helps.
    LVL 7

    Author Comment

    Thanks guys

    How can I add a subnets in the sites and services.
    LVL 51

    Expert Comment

    Open Active Directory Sites and Services.
    Right click on Subnet and select New>Subnet.
    File in the network address and the subnet mask.
    In the lower pane, select the site it will be associated with.
    Click OK.
    LVL 23

    Assisted Solution

    quickest way to figure out the "PDC":

    NLTEST /dclist:domainname

    where domainname is the name of the domain (netbios name not FQDN), you'll get a list of all the DC's in that domain.


    NLTEST /dcname:domainname

    will get you the PDC emulator for that domain
    LVL 7

    Author Comment

    Thanks Everyone
    I split the points to every one.

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