Current Setup: I have child 2 domains, one in America (amer.domain.com) and one in Asia (asia.domain.com) in the same forest. Both domains are connected via MPLS links.

In each physical site, there is 1 domain controller that is joined to the trusted child domain.

Example: Domain Controller in Singapore would typically be joining asia.domain.com, but there will be 1 domain controller joined to amer.domain.com (for reference purpose, lets call it sng1.amer.domain.com)

Issue: Being in Singapore, when I want to browse amer.domain.com, the ADUC utility will connect to sng1.amer.domain.com

It takes about 1 minute to connect it and roughly 3-4 minutes to do a simple search for objects. This does not happen when a user in America uses ADUC to search asia.domain.com, which would connect to a domain controller which is joined to the asia.domain.com

What could be the issue and how would I be able to determine what's causing this?

  • The machine from which you run ADUC, which domain is it in?
    – strongline
    Oct 1, 2015 at 13:39
  • 1
    Actually since they are in same forest, more importantly, were site/subnet info well defined? All domains share same site info in one forest.
    – strongline
    Oct 1, 2015 at 13:53
  • The machine I run ADUC from is on the asia.domain.com when I query amer.domain.com Each physical site have their own Site Code and has a specific subnet associated to it. For the sng1.amer.domain.com, it sits in the SNG site code which also houses other Singapore domain controllers, and also use the IP address from the subnet which is tied to the SNG site.
    – Fahmy Aziz
    Oct 1, 2015 at 14:21
  • run "nltest /dsgetsite" on both amer DC @SNG and client make sure they are actually in same site. Using ldp to file a direct LDAP query to sng1.amer to see what the response time is so we know that DC has no performance issue.
    – strongline
    Oct 1, 2015 at 14:41
  • Is there a shortcut trust between the two child domains?
    – Davidw
    Oct 1, 2015 at 14:52


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