Second Domain Forest

Hi All,

Might be a silly question, but it's something I have not done before. We have 3 DC's, 2 2003 and 1 2012 all for the same domain. Can I run up another forest beside it and use the same IP range as the first forest. To be clear I am not planning on creating a DHCP server for the second forest. FYI I am trying to test single signon with an application being deployed currently. The developer is running into issues and blaming on our 2003 DFL, so I want to set up another domain purely at 2012 DFL to see if this is the case. I know I could segregate using VLANS's and vSwitches, but I am just looking to test something really quick and delete it when not needed anymore.

Hopefully what I am trying to achieve is clear enough.
Josh RoweSystems AdministratorAsked:
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Toni UranjekConsultant/TrainerCommented:
No need to segregate. Multiple forests can run on same IP range.

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Toni UranjekConsultant/TrainerCommented:
And I forgot to mention. Your developer is wrong. Domain and forest levels only change how Active Directory works. If he is not developing an application which works with AD, DFL and FFL should not affect his application.

Understanding Active Directory Domain Services (AD DS) Functional Levels
https://technet.microsoft.com/en-us/library/understanding-active-directory-functional-levels(v=ws.10).aspx
MASEE Solution Guide - Technical Dept HeadCommented:
Agree with Toni. You can have multiple forest in the same network.
If his application a MS build application which is intregrated with AD then you can think of issues of DFL and FFL.
Else as commented above no need to worry of these.
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Windows Server 2012

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