Clients running Windows 2000 and later can send updates requests directly to a DNS server to update its own pointer and host records. Or the client can request that the DHCP server make the update on its behalf. Pre-Windows 2000 clients, on the other hand, do no support dynamic update.

You can configure a DHCP server for DNS integration using the steps below:

1. Click Start, point to Administrative Tools, and select DHCP.

2. Right click your DHCP server and click Properties.
3. Select the DNS tab.
4. Choose the appropriate settings outlined below.
   • Enable DNS dynamic updates according to the settings below. This option is selected by default. Deselecting this option means the DHCP server will not perform any dynamic updates.

   • Dynamically update DNS A and PTR records only if requested by the DHCP clients. This option is selected by default. Selecting this option means the DHCP server will perform the updates if requested to do so by the client.
   • Always dynamically update DNS A and PTR records. Selecting this option means the DHCP server will always update DNS A and PTR records on behalf of DHCP clients.
   • Discard A and PTR records when the lease is deleted. Specifies whether the DHCP server should discard the records when a DHCP client lease expires.
   • Dynamically update DNS A and PTR records for DHCP clients that do not request updates (for example, clients running Windows NT 4.0). Select this option if there are clients on the network that do no support dynamic updates, such as those clients running Windows NT 4.0. In such cases, the DHCP server will perform the updates on behalf of the client.
5. Click OK.