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 defines 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 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.
5. Verifying your configuration.

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