Transfering Global Catalog

I have 2 Servers:

-Windows 2008 (PDC, & holds Global Catalog)
-Windows 2003 (2nd DC only)

Our Windows 2008 Server has been going down as a result affecting all our other Terminal Servers that authenticate to it. 2 questions:

1. Is there way that i can promote the 2nd DC to be a Global Catalog without messing anythin up? If so what steps to do i take to make 2nd Server a GC server and at the end of the day have 2........

thanks,
sowetoAsked:
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Mike KlineCommented:
You just check a box in sites and services

http://technet.microsoft.com/en-us/library/cc782576(WS.10).aspx

Definitely a good idea to make DC2 a global catalog.
I always try and make every DC a GC (see bullet 1  http://adisfun.blogspot.com/2009/04/lessons-learned-from-eric-fleischman.html)


Thanks

Mike
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tigermattCommented:

Yes, in fact, it is recommended you have AT LEAST two Global Catalogs for resilience purposes.

On either DC, Start > Administrative Tools > Active Directory Sites and Services. Drill down through the Site name, 'Servers' container, expand the DC itself, right-click NTDS Settings and click Properties. Check the 'Global Catalog' box and press OK.

It will take some time for the GC promotion process to take place, but there should be appropriate entries logged in the Event Logs.

-Matt
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sowetoAuthor Commented:
So making this the 2nd GC will not affect or cripple network? Will this then act as a failover Server just incase the main PDC is down?
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Mike KlineCommented:
Are you in a single domain enviornment?  

In a small network making a box a GC is not going to cause that much extra traffic/churn.    If you are talking about a multi-domain setting with a huge environment then making the box a GC could cause significant traffic.

Thanks

Mike
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tigermattCommented:

Oops, sorry, I dual posted at the same time as Mike. :)

No, promoting a second GC is actually best practice. You won't cripple your network in doing so.

With regards to it acting as a "failover" server, there are other factors you need to consider, such as the location of your DNS services, which are heavily used by Active Directory for resource location. Do you have the DNS role on both servers, with client workstations and other servers using one server as the preferred but the other as an alternate DNS server? Your zone should be Active Directory-integrated for ease of replication of DNS zone information between the two DCs.

-Matt
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tigermattCommented:

Done it again. Sorry Mike!
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vmwarun - ArunCommented:
Global Catalog and PDC are two different roles which a Domain Controller can have.
PDC Emulator role is by default assigned to one of the domain controllers in the domain (@ present W2K8 in your environment).
If your PDC Emulator goes down, then you would have to manually seize the role from the other W2K3 Domain Controller. It is not an automatic failover in case of a Server failure.
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Mike KlineCommented:
Matt,  no problems, we all do that :)

In terms of the PDC emulator and other FSMO roles that is another discussion.  If the PDCe goes down users should be able to still login to the using DC2 (configured as a GC/DNS server too).

Thanks

Mike
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