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Will upgrading the functional level of a domain to 2008 force use of DFS for sysvol replication?

I currently have a domain with 4 domain controllers. The domain controllers were migrated from 2003 to 2008 R2. The functional level of the domain and forest is at Windows 2003. If I update the functional level to 2008, will the domain automatically start using DFS for sysvol migration? Or will it stay FRS until I go through the FRS to DFS migration procedure?
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draperlab1
Asked:
draperlab1
2 Solutions
 
ashutoshsapreCommented:
No, it keeps using FRS. You will have to follow certain steps if you want to use DFS fpr sysvol replication. Refer to the following link for more details:

Upgrading Your SYSVOL to DFS-R Replication

SYSVOL Replication Migration Guide: FRS to DFS Replication
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draperlab1Author Commented:
If I have to leave it FRS for a period of time, will there be any negative effects? As I understand it DFS-R is pretty much a performance enhancement?

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CERTExpertCommented:
FRS won't have any negative impact however DFS-R definitely have lot of advantages over FRS i.e. Block-Level Replication, Bandwidth Throttling, self-healing etc.
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draperlab1Author Commented:
Thanks for the info.

I have one other question, DFS is reliant on DNS, so if you do a lookup internally on your domain (ie - domain.int) you should get the IP of the first available domain controller, or all the domain controllers?



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CERTExpertCommented:
MUP on the client first need to know which redirector to use (SMB or DFS) after it knows this, it need to query the DC which is the authenticating DC so DFS doesn't separately finds a DC rather contact a DC which is already been found by the netlogon service in the DC Locator Process in which first of all a generic DNS query is been sent and then if the DC which responds is not the one in the same (or closest site if there is none in the same site), then a site specific DNS query is being sent and DC records are been returned on round robin basic by default when the client does the generic query.
Read KB http://support.microsoft.com/kb/247811 for more details into DC Locator Process.
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draperlab1Author Commented:
Would this KB still be valid for 2008?
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CERTExpertCommented:
Yes, the DC Locator is still same in 2008 as well except some extra flags with netlogon. There are other links as well like http://technet.microsoft.com/en-us/library/cc978016.aspx, http://technet.microsoft.com/en-us/library/cc759550(WS.10).aspx.
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