Retire old DHCP server
Posted on 2011-04-29
We have two DHCP servers in use each with it's own separate scope. A Windows Server 2000, and 2008 R2.
We would like to retire the Windows 2000 server and transfer all leases to the 2008 server.
There are currently about 100 leases on the 2000 server and 50 on the 2008 server. There are not currently enough available IP address to add to the 2008 server to accommodated the clients currently leased out by the 2000 server.
What is the recommended way to do this without overwriting the current scope on the 2008 server? (which transferring the database would do correct?)
We do not plan to add a second dhcp server to replace the ageing 2000 server. We want to remove the 2000 server before it has any hardware issues since we do not have a support contract for it.
to make the problem more clear:
It is my understanding that a dhcp client will keep it's lease until it expires, and if we add the scope to the new server it will try assigning IP's that are still in use from un-expired leases on the old server. This would result in IP conflicts which we absoutly can not have. This needs to be seamless and without having to log on to each PC and do a ipconfig /renew.
ANY thoughts or comments are appreciated, but I am looking for a step-by-step plan that we can follow and have the least amount of potential things to go wrong as possible.