Migrating DCHP between 2 DC's

Microsoft Windows server 2003 enterprise
May 30, 2010 at 22:50:25
Specs: Windows 7
Hello. I'm in the process of migrating DCHP services between 2 Domain Controllers belonging to 2 different Domains. What is the best procedure for seamless transition (without affecting clients). Thanks.

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#1
May 31, 2010 at 07:55:40
How many DHCP clients in each domain?

If it's not too many, you could divide your DHCP scope in half, leave the lower half on the original DC and setup DHCP on the new DC with the top half of the scope. Then shut down DHCP on the original DC and expand the scope on the new one to encompass the IP's from the original DHCP server.


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#2
May 31, 2010 at 20:06:42
Or, you could just move the DHCP database to the other server. Do you want to just move the service? In other words, do you just want a different server to handle DHCP?

If so, you can export the current database to a text file. Install DHCP on the new server and import the database from the old server to the new. Disable the scope on the old server and enable it on the new server. The clients will never know it happened.

To export the database to a file called test.txt: netsh dhcp server export c:\test.txt all

Copy that file to the new server then import on the new server: netsh dhcp server import c:\test.txt all

Good luck.


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#3
June 1, 2010 at 12:22:07
Curt R, That is what I initially planned to do. There's only 1 scope with about 30 clients. Thanks.

Glen, I want DCHP services to be handled by a different server (different domain) since we will get rid of the other domain. Thanks.


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#4
June 2, 2010 at 18:36:08
The fact it is a different domain isn't a problem. Is it on the same subnet? If so, you may only need to change the name server options if you are supplying them via DHCP.

I move the DHCP server role between servers fairly often when doing migrations or upgrades and it is a seamless operation. Reservations are maintained, assigned IPs are maintained. Again, the clients are none the wiser.

If you are moving it to a different network, then that is a different story.


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