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Two forests on the same LAN

Posted on 2010-09-01
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Last Modified: 2012-05-10
Hi, we have a small office with one LAN that includes a single forest with a single domain.

We are hosting a conference next week, and we are setting up demo machines for our product.  We want to create a unique logon for each person that registers for the conference.

I was thinking about just using DCPromo and creating a new forest, and then just giving the machines in this new forest static IPs.  I can then just use DCPromo to remove the forest when the conference is over.

I'm a little paranoid about this and worried that this could affect our current active directory forest.

Is there anything to be worried about?  Any precautions I should take?
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Question by:jamorlando
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by:bernardbrink
ID: 33576444
Read carefully when installing/removing. Create a seperate domain/forest.
Don't setup dhcp twice,
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Expert Comment

by:Coast-IT
ID: 33576458
I wouldn't really have two forests on the same LAN in a production environment, although it should work...

It would be easier to use VLANS to separate your LANS, install the new forest in the new LAN segment, then create a forest trust if resources need to be shared between both.
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Expert Comment

by:Darius Ghassem
ID: 33576485
You should be good to go but just make sure you are running on a different subnet and you name the domain something totally different so there will not be any mistakes or DNS issues.

Create new forest don't connect to your existing forest
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Expert Comment

by:amieldar
ID: 33576555
hi

first of all there is no problem to run 2 difrent domains in same lan.

But you should consider the method of plannung the new domain.

I needd more info abuot your current  server (is he dhcp\static, terminal server ect ? ...)



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Author Comment

by:jamorlando
ID: 33576583
@amieldar, I was thinking of doing a new forest instead of a new domain, just to make sure that the layers are even more seperate from each other.

We have two domain controllers here running AD and DNS, and then our sonicwall firewall runs the DHCP.  DHCP shouldn't matter, because I plan on just giving the 2-3 computers on this seperate forest their own static IP address.
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Accepted Solution

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Darius Ghassem earned 250 total points
ID: 33577028
The new forest should  be on a seperate LAN so seperate IP scheme then your current scheme since this could cause conflicts with DNS if they are on the same subnet
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