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DHCP migration to DHCP Server

Posted on 2006-07-13
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Last Modified: 2010-04-13
Hi, I am planning to migrate a W2K 5 scope DHCP  (server A) to a live W2k DHCP server (Server B).
I have searched MS etc and can only find the following :
http://support.microsoft.com/kb/325473/
http://support.microsoft.com/kb/130642/en-us .

However the solutions provided require me to delete DHCP server from Server B which I do not like.
Is there a way of migrating the 5 DHCP scopes from server A alongside the current scopes on Server B >

Plan  is to decommission server A and have all DHCP scopes running on Server B .

all help much appreciated both server windows 2000 enterprise servers w/ SP4
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Question by:doylenicky
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Expert Comment

by:Pber
ID: 17101413
Check this out:

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by:Pber
ID: 17101417
That link would not have worked. (:

Here, try this one:
http://support.microsoft.com/kb/325473/
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Author Comment

by:doylenicky
ID: 17109842
Thanks Pber,

    However the URL you posted is same as one of the ones I posted in question. Server B already has DHCP service installed and running.

Nicky
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Expert Comment

by:Pber
ID: 17109950
You have a fairly small scope base so this is what I would do to get around this.

Premigration:

On ServerB
Precreate the DHCP scopes on server B as you do on serverA but don't active the scopes.
Ensure the DHCP server has confict detection turned on (Advanced tab in properties of DHCP server)

On Server A:
Depending what your lease times are drop them to hours.  So people will get new leases quickly.  You will have to do this as many days as you have for your current lease times as you need lead time for clients to get the new settings when they do a renew.

On cutover time after hours (after lead time mentioned earlier):
Repoint all DHCP relay agents on your routers to point to serverB's ipaddress. Or better yet, reconfigure the ipaddress on ServerB to the one serverA had.  This way you don't have to hit all your networking gear.
Deactivate the scopes on Server A.
Active all the scopes on Server B.

Since the DHCP lease time is short and you are running after hours, the clients will have picked up new new leases from the new DHCP server before they come in for the day.




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Author Comment

by:doylenicky
ID: 17137166
Thanks Pber.

     I will probably go with this option as easier to implement . Pity MS have not an easier method to work with DHCP :-( .
Anyway I will let you know how things go in about 10 days time...

Nicky
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Pber earned 250 total points
ID: 17137594
good luck.  Let me know if you have any more questions.
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