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dhcp migration

does anybody know if moving dhcp from one windows server to another can be done while the network is up and running with users on it or is it absolutely necessary to do it on down time?
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-pH
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-pH
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2 Solutions
 
Joseph DalyCommented:
You should be able to do it while the network is up. Basically you could use the DHCP backup and restore method that MS has published and your DHCP db on the new server. Once you are satisfied you would deactivate the old dhcp server and bring the new one online.

An optional step would be to decrease the lease duration to something short like an hour or two. This would help the clients get onto the new DHCP server more quickly.

The biggest thing you dont want to do is have two DHCP servers with the same scope running.
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-pHAuthor Commented:
i am not familiar with the backup/restore from ms for dhcp. i was going to export via the cmd line then import to the other server. after the import is complete i would then stop/disable the dhcp service on the old server.
what method were you speaking of? and would it be easier/better?
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Joseph DalyCommented:
Its probably the same page you were looking at but this is the ms article i was mentioning.
http://support.microsoft.com/kb/325473
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-pHAuthor Commented:
since i was moving from one 2003 server to another i used the following:
old server --     netsh dhcp server export C:\dhcp.txt all
new server --  netsh dhcp server import C:\dhcp.txt all
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Joseph DalyCommented:
Sorry I gotta object to this question... I feel I provided an answer that led to the correct solving of your need.
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Joseph DalyCommented:
Sorry I gotta object to this question... I feel I provided an answer that led to the correct solving of your need.
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-pHAuthor Commented:
the suggestion you gave of back up/restore was not the route that worked for me.
the article you suggested was already what i was doing as you can see from my post.
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-pHAuthor Commented:
just read my own question.... just realized i only asked about performing the task during uptime or not.
doh.
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