Your existing network topology provides a basic configuration for the distribution of DHCP resources. There are two paths, however, depending on whether you are migrating from an existing DHCP solution or you are installing and configuring DHCP for the first time.
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You can import your existing Novell DHCP 2.0 database or BOOTP-based configuration files using the DNS/DHCP Management Utility. The import function enables you to specify the context into which you import the data.
If you are planning to use DHCP for the first time, you must gather a significant amount of information. You need to make a list of all hosts to be served by the DHCP server. You must include all devices that use network addresses in every segment of your network. You must also compile lists of IP address assignments.
Organize your lists of hosts and IP addresses by geographic location. For example, if your network is spread over a WAN, make a list for each location to help you organize the distribution of DHCP resources.
You must have a list of all permanently assigned network addresses. You might also want to make a list of devices that are to be denied IP addresses and those hosts that are to receive strict limitations on leases.
After you gather the necessary information, you need to create the necessary objects to represent this information. This is done by creating subnet address ranges for contiguous network addresses and other, more specific information. You will probably have a separate subnet address range for each LAN segment of your network. You will also create objects of subnets and DHCP servers.