Here is the situation:
I have 2 2003 server DCs and I just added 3 2008 DC Servers in my domain (same site). On the 2 2003 servers I have 1 scope on each DC split like this
2003 DC1 - 192.168.10.20 to 192.168.10.127
2003 DC2 - 192.168.10.128 to 192.168.10.254
I exported and then imported the dhcp scope settings from the 2 2003 servers to 2 of the 2008 servers and everything is running fine - so it's like a mirror now so to speak. On the 3rd 2008 server I need to make a scope of these IPs, so I need to split it up something like:
2008 DC3 - 192.168.10.20 to 192.168.10.50
2008 DC4 - 192.168.10.51 to 192.168.10.200
2008 DC5 - 192.168.10.210 to 192.168.10.254
While I change the scope settings on the 2008 DCs (splitting them up like above) will this cause any problems with clients who already have leases?
Once I am done creating the scopes on the 2008 servers as above can I then stop the DHCP services on the 2003 servers safely without having issues? If a client(s) is now having a lease from one of the 2003 servers and I stop the DHCP services on the 2003 server I'm assuming they will be fine since it will automatically be picked up by the scopes on the 2008 DCs, correct?
I hope running the same scopes on the servers ( for the time being) wont cause problems.
I plan on demoting the 2003 DCs as soon as I straighten out the DHCP on the 2008 servers. Thanks.