Article ID: 174051 - View products that this article applies to.
This article was previously published under Q174051
It may be necessary to remove an existing scope from a Dynamic Host Configuration Protocol (DHCP) server and replace it with a new scope. For example, you may obtain a registered class of IP addresses for your network or you may be changing the class of IP addresses to accommodate more hosts or networks. This article discusses the recommended method of performing this task.
When you need to change your DHCP scope range, it may be necessary to leave the server's original IP address bound to the network interface card (NIC) for connectivity reasons until all clients have obtained an IP address from the new scope. However, if you just create the new scope, you may notice that the DHCP server does not assign leases from the newly created scope(s) after binding additional IP address(es) to the NIC.
This can happen because DHCP only binds to one IP address for each NIC and this IP address is the primary address found in TCP/IP properties. The additional addresses are found in the Advanced Properties of TCP/IP dialog box.
To make this transition, you will need to do one of the following: