Initial Configuration

The Windows NT^� 4.0 DHCP server configuration involves setting up a scope for the IP telephone. A DHCP scope is essentially a grouping of IP devices (in this case IP telephones) running the DHCP client service in a subnet. The scope is used to define parameters for each subnet. Each scope has the following properties:

• A unique subnet mask used to determine the subnet related to a given IP address.
• A scope name assigned by the administrator when the scope is created.
• Lease duration values to be assigned to DHCP clients with dynamic addresses.

In addition, the DHCP server can assign configuration parameters to a client, and these can be specified for each individual DHCP scope.

Setting up the Windows NT^� 4.0 DHCP server requires the following steps:

1. Creating a DHCP scope for the IP Telephones.
2. Editing custom options.
3. Adding the DHCP options.
4. Activating the new scope.

Each step is detailed in the next four sub-sections.