do i need to have a global catalog server or dc at a slow wan link rmote site

dougdog
dougdog used Ask the Experts™
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I have a remote site running a 3g connection
I need to demote the dc here to jut a member server
can I do this
does this site need a global catalog server
the router will give dhcp and dns
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Dirk MareSystems Engineer (Acting IT Manager)

Commented:
Depends on how many workstations and server are on this site.

I would demote it and promote it to a RODC and GC server. You don't want to congest the slow link with authentication and replication tasks.

DirkMare

Author

Commented:
If it's not a dc there would  be no replication
Dirk MareSystems Engineer (Acting IT Manager)

Commented:
Correct but RODC would only do a initial sync of AD and after that only AD changes/updates. You can setup RODC password replication for users in that site to save even more on bandwidth and in a event that link goes down.

DirkMare
Senior Solution Architect
Most Valuable Expert 2015
Top Expert 2015
Commented:
Personally from experience RODC's are just an added server to manage. The only good thing that you really get out of an RODC is that you have local DNS queries which allows you to have a little faster response time.

However depedning on the number of users at your site really should determine the decision for having a DC in this site. I would never consider putting a DC in a site that has less than 50 users.

Caching passwords on RODC is possible but it is like defeating the purpose of an RODC (never understood why they would do that..)

DNS/Authentication queries will be fine over a WAN link if the remote sites are under 100ms. If they are not under 100ms and you have close to 50 users then consider keeping a DC at that site. You could then use that site as a Hub site for other remote sites that are geographically close to it.

Will.

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