DHCP - 2003 server -  Export Scopes

Posted on 2012-09-13
Last Modified: 2012-09-17
I have a win 2003 server DHCP - with multiple scopes & vlans (15) I would like to export one scope at a time, to a new DHCP server 2008 r2, is this possible with – netsh dhcp server export dhcp.txt  ( scope to export). Without affecting any of the 15 scopes currently on the 2003 server.
Question by:Cooker4246
    LVL 15

    Accepted Solution

    If you have two DHCP servers they on the same subnet - yes they can assign the same IP to different machines/devices.

    In the Advanced options for DHCP on Windows 2003 and 2008 you will see an option conflict detection attempts. This will tell the DHCP server to attempt to ping the addresses before it hands them out.

    I managed an environment for 3 years were we configured two machines with the same ranges and turned on conflict detection attempts without issues. ( we just had to be sure to put any reservations in both DHCP severs).

    If you have devices that by security/design that do not reply to ping – this solution would be a problem.

    Win2003 –
    Enable address conflict detection-
    Best Practices -
    Windows 2008 –
    Enable address conflict detection

    You can enable and disable scopes - also. That would let you move them over as needed.
    I had found that the newer Windows 2008 machine had given out DHCP addresses 60-80% of the time - this was not an issue since they had the same ip range we were not running out addresses.

    I think MS still suggest using two DHCP servers on each subnet with the range split.


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