2 DHCP Servers?

[tylan]

I just noticed that one of our new clients has two DHCP servers running on his network. It appears that the PDC (NT 4)is running as a DHCP server it seems to be serving 10.0.6.0 thru 10.0.7.255. (Yes, I know that you can'y give out 255!) The second server is a Win2K, and it serves 10.0.6.0-10.0.9.254.

Obviously this could cause IP conflicts, so can I just turn off the NT4? Or will its clients have trouble finding the other server when thier IP expires? Or should I just leave it alone?

 

[netometer]

Hi!
You can stop the DHCP service on the PDC. The DHCP server running on the W2K box will answer their request without a problem.

What you definitely need to do is set an IP exclusion range on the W2K DHCP server in order to prevent conflicts. When all the clients of the NT 4.0 server switch to the new DHCP you can safely remove the exclusion range.
There is a nice way to export the DHCP leases from the NT 4.0 DHCP to the W2K DHCP but if you have enough IP addresses I would not bother with this.

If you want to have redundancy for the DHCP service on your network you might want to keep both servers and just reconfigure the scopes. Assign the same IP range to both DHCP servers and set exclusion range on each of them. For example on the NT 4.0 exclude the second half and on the W2K the first.

NetoMeter

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