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DHCP for Windows 2000 by Neall Alcott

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Configuring Multihomed DHCP Servers

A multihomed server is a computer that is attached to more than one physical network. This requires the installation of multiple network cards in the server.

A multihomed DHCP server is a server that may be providing the DHCP service on multiple physical networks. Although I personally would not recommend the use of a multihomed DHCP server, it can be used in situations where there are two or more network segments that are not connected via a router, or where the network segments are connected with a router but the router does not have any DHCP relay agent functionality. Both of these situations are extremely unlikely, however. The most likely situation is that where the Windows 2000 server is functioning as both a router and a DHCP server.

By default, when DHCP first starts on a multihomed server, the service binds to the first network interface. If this first network interface has a static IP address (which is required to run a DHCP server), the service binds to that card as normal. However, if the first network interface is using a dynamically assigned IP address, the service does not bind to that interface.

In this case, an administrator needs to either assign static IP addresses or selectively bind the DHCP service to an interface with a static IP address.

I will take a moment to describe another situation where the administrator needs to selectively bind the DHCP service to an interface. Let’s say that there is a network with two segments. ...

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