force to another DC

Eprs_Admin
Eprs_Admin used Ask the Experts™
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Hi Experts,

I have to force another DC to use for auth.
Because now we use the DC in Germany from Singapore.
We have other DCs which are more near located.

I have checked this : nltest /dsgetdc:domain.com
In the registry I have seen a dynamic sitename.

How to changed this and force another DC ?
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DrDave242Principal Support Engineer

Commented:
Your AD sites and their associated subnets are almost certainly not configured correctly if your users are being authenticated by a DC on another continent when there are local DCs available. That's where I would look first.

In AD Sites and Services, make sure you've got site objects for every site that contains a DC and that the appropriate DCs are in those sites. Then make sure there are subnet objects for every IP range in your environment and that each subnet is linked to the correct site. Those subnet objects are the mechanism AD uses to determine which site your member servers and clients are in.
Eprs_AdminSystem Architect

Author

Commented:
Your AD sites and their associated subnets are almost certainly not configured correctly if your users are being authenticated by a DC on another continent when there are local DCs available. That's where I would look first.

no local DC available
Network Engineer
Commented:
AD Sites and services still need to be properly configured so that site links from Singapore to other sites with DCs have lower total cost than to the site in Germany. It works even if you don't have local DC in Singapore.
DrDave242Principal Support Engineer
Commented:
Sorry, I misinterpreted "more near" to mean that there was a local DC. Kevin is correct; site links and their relative costs come in to play when users at a site without a local DC need to access one at a different site. If everything is configured correctly, AD will be able to determine which site is the "closest," defined as the one with the lowest overall cost between it at the users' site, and users will be directed to a DC at that site.

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