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Verifying the Installation of the DHCP Server

Use the following procedure to verify whether the DHCP server is installed.

  1. Select Start-->Program-->Administrative Tools-->Computer Management.
  2. Under Services and Applications in the Computer Management tree, find DHCP.
  3. If DHCP is not installed, install the DHCP server. Otherwise, proceed directly to
    Creating and Configuring a DHCP Scope for instructions on server configuration.
Creating and Configuring a DHCP Scope

Use the following procedure to create and configure a DHCP scope.

  1. Select Start-->Programs-->Administrative Tools-->DHCP.
  2. In the console tree, click the DHCP server to which you want to add the DHCP scope for the IP telephones. This is usually the name of your DHCP server machine.
  3. Select Action-->New Scope from the menu.

Windows displays the New Scope Wizard to guide you through rest of the setup.

  1. Click the Next button.

The Scope Name dialog box displays.

  1. In the Name field, enter a name for the scope such as “DEFINITY IP Telephones,” then enter a brief comment in the Description field.
  2. When you finish Steps 1 - 5, click the Next button.

The IP Address Range dialog box displays.

  1. Define the range of IP Addresses used by the IP telephones listed in Table 3:  Required Network Information Before Installation - Per DHCP Server. The Start IP Address is the first IP Address available to the IP telephones. The End IP Address is the last IP Address available to the IP telephones.

NOTE: We recommend not mixing 4600 Series IP Telephones and PCs in the
same scope.

  1. Define the subnet mask in one of two ways:

Enter only one of these values. When you finish, click the Next button.
The Add Exclusions dialog box displays.

  1. Exclude any IP Addresses in the range specified in the previous step that you do not want assigned to an IP telephone.
    1. In the Start Address field under Exclusion Range, enter the first IP Address in the range you want to exclude.
    2. In the End Address field under Exclusion Range, enter the last IP Address in the range you want to exclude.
    3. Click the Add button.
    4. Repeat steps a. through c. for each IP Address range that you want to exclude.

NOTE: You can add additional exclusion ranges later by right clicking the Address Pool under the newly created scope and selecting the New Exclusion Range option.

Example:

Suppose the ranges of IP Addresses available for your IP telephone network are:

The Start IP Address and End IP Address you enter in the IP Address Range dialog box are 135.254.76.7 and 135.254.76.230 respectively.

In the Add Exclusions dialog box, exclude the following ranges:

Click the Next button after you enter all the exclusions.
The Lease Duration dialog box displays.

  1. For all telephones that obtain their IP Addresses from the server, enter 30 days in the Lease Duration field. This is the duration after which a device’s IP Address expires and which the device needs to renew.
  2. Click the Next button.

The Configure DHCP Options dialog box displays.

  1. Click the No, I will activate this scope later button.

The Router (Default Gateway) dialog box displays.

  1. For each router or default gateway, enter the IP Address and click the Add button.

When you are done, click the Next button.
The Completing the New Scope Wizard dialog box displays.

  1. Click the Finish button.

The new scope appears under your server in the DHCP tree. The scope is not yet active and will not assign IP Addresses.

  1. Highlight the newly created scope and select Action-->Properties from the menu.
  2. Under Lease duration for DHCP clients, select 2 weeks (minimum) and click the OK button.

CAUTION: IP Address leases are kept active for varying periods of time. To avoid having calls terminated suddenly, ensure that the lease duration is not too short, for example, not set to less than two weeks. A lease duration of two to four weeks is reasonable.


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