Is it a good idea to create an Active Directory site without a domain controller?

Posted on 2009-04-23
Last Modified: 2012-05-06
I have several branches with different subnets. They are connected via VPN over not-so-fast ADSL. Currently I have two domain controllers in a central site (A) and another domain controller in a secondary site (B). For other subnets, I haven't yet configured sites or domain controllers. I thought I was going to wait until I get a domain controller for each subnet before configuring site, but now I get a warning in Event Viewer that says, "During the past 4.25 hours there have been 426 connections to this Domain Controller from client machines whose IP addresses don't map to any of the existing site in the enterprise..." The EventID is 5807. Will this be resolved once I configure a site for each subnet?
Question by:RabbitBike
    LVL 95

    Expert Comment

    by:Lee W, MVP
    I would create the sites since you may be able to adjust which sites prefer which domain controllers through costing.

    Author Comment

    Thank you. And now I get the following Event in the DC in the main site; "Site 'XX' does not have any LDAP servers for non-domain NC ''. LDAP servers in site 'Default-First-Site-Name' have been automatically selected to cover site 'XX' for non-domain NC '' based on configured Directory Server replication costs." (Event ID 5792) So, is this what you suggested, which is to choose the preferred DC through costing? And if so, am I right in assuming that this is done automatically, so I won't have to worry too much? Thank you in advance.
    LVL 95

    Accepted Solution

    Site costing should be done automatically based on the available bandwidth.  See


    Author Closing Comment

    Thank you!

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