Need to change IP address range on DHCP server

eisenerg · 01-28-2009, 06:51 AM

Hello all,
I have an interesting situation. Our network here uses 129.1.X.XXX. This was a holdover from an old UNIX system that was set up way back in the early '90s. We are now using Windows Server 2003 (3 servers) and I want to change the IP range to a private address (10.XX.X.XXX). Is there a simple way to do this? Can someone point me in the right direction? Thanks for your help.

**johnwill** · 01-28-2009, 12:05 PM

Well, if all of the machines are using DHCP, it should be pretty simple. OTOH, if they're all statically assigned, it will be a lot more work.

We'd have to know more about all the network topology to provide a detailed answer.

eisenerg · 01-28-2009, 12:54 PM

Hi John, thanks for replying.
There is one main server that is the DHCP. All 3 servers have static ips, and there are 5 printers and 2 clients that are static as well. The rest of them are dynamic.
The DNS is on the main server, and there is a gateway that is a D-link router. This is used only for internet access.

My thoughts are to change the 3 server ips to the new configuration, then change the DHCP pool to match. Once that is done go around and change all the devices that have static addresses.

Is that enough information? I'm kind of new to this level and as such am somewhat unsure of some terms and such.

01-28-2009, 06:51 AM	#1 (permalink)
eisenerg Registered User Join Date: Mar 2006 Posts: 2 OS: Win2000	Need to change IP address range on DHCP server Hello all, I have an interesting situation. Our network here uses 129.1.X.XXX. This was a holdover from an old UNIX system that was set up way back in the early '90s. We are now using Windows Server 2003 (3 servers) and I want to change the IP range to a private address (10.XX.X.XXX). Is there a simple way to do this? Can someone point me in the right direction? Thanks for your help.

01-28-2009, 12:05 PM	#2 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,874 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: Need to change IP address range on DHCP server Well, if all of the machines are using DHCP, it should be pretty simple. OTOH, if they're all statically assigned, it will be a lot more work. We'd have to know more about all the network topology to provide a detailed answer. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

01-28-2009, 12:54 PM	#3 (permalink)
eisenerg Registered User Join Date: Mar 2006 Posts: 2 OS: Win2000	Re: Need to change IP address range on DHCP server Hi John, thanks for replying. There is one main server that is the DHCP. All 3 servers have static ips, and there are 5 printers and 2 clients that are static as well. The rest of them are dynamic. The DNS is on the main server, and there is a gateway that is a D-link router. This is used only for internet access. My thoughts are to change the 3 server ips to the new configuration, then change the DHCP pool to match. Once that is done go around and change all the devices that have static addresses. Is that enough information? I'm kind of new to this level and as such am somewhat unsure of some terms and such.