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by chad r.

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I am having a DHCP problem. I am running two different IP address Schemes on the same LAN and I need to run DHCP on both Schemes and that each Scheme be sepearated. I have a Windows 2000 Server and I need to know will a Proxy Server between both segements block DHCP transmition. One scheme is 150.208.0.0 and the other is 192.168.1.0. Also will a NAT Server be able to or do I need some other type of software.
PS.
We do not have enough cash to buy a router with two ports or even another routerwith one port.
Also I now that Windows 2000 server come with a RRAS program that can simulate a router with NAT installed will this do the job too.

5 replies

by jaystar

Are you running both the 150.208.0.0 and the 192.168.1.0 on the same wire, or are these on seperate physical segments? If they are on the same wire, you can not know which DHCP server would answer the request without eitehr assigning the clietn a special tag (in Windows 2000 and XP clients) or without vlans to seperate the traffic. If your network systems are relatively knew, they should support the 802.1q VLANS which could do it for you.

COntact me direct through email and I will attempt to help you as much as I can.

by timwalsh

I'm a little confused as to your set-up. You seem to have one routable network segment (150.208.x.x - presumably assigned by your ISP) and one non-routable private (internal) network segment (192.168.x.x). The internal segment cannot connect to the Internet (or talk to other network segments) with out going through a NAT router of some sort. Are the 2 segments talking to each other right now? Are these 2 separate domains?
You have 2 options here.
1. Set up 2 different DHCP servers: 1 with a scope for the routable IP range and 1 with a scope for the non-routable IP range with the serversa connected to the appropriate network segment.
2. While you can set up multiple scopes on single DHCP server, a single DHCP server cannot dynamically assign addresses from a given scope to given computer. You would have to manually enter DHCP reservations for each scope, essentially tying a fixed IP address to a given computer based on the computer's MAC address. This sort of defeats the purpose of DHCP altogether except you don't have to enter fixed IP addresses on each client.
Yes you can use Win2K to set up a NAT router (you need 2 NICs) and route either between your private network and public network or between you private network and the Internet. Have not seen any scenarios that would allow you to route between all three. However you will still the the same DHCP restictions as above.
Hope this helps.

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