Verifying the Installation of the DHCP Server
Use the following procedure to verify whether the DHCP server is
installed.
- Select
Start-->Program-->Administrative
Tools-->Computer Management.
- Under Services and Applications in the
Computer Management tree, find DHCP.
- 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.
- Select
Start-->Programs-->Administrative
Tools-->DHCP.
- 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.
- Select Action-->New Scope
from the menu.
Windows displays the New Scope
Wizard to guide you through rest of the setup.
- Click the Next button.
The Scope Name dialog box displays.
- In the Name field, enter a name for the scope
such as “DEFINITY IP Telephones,” then enter a brief comment in the
Description field.
- When you finish Steps 1 - 5, click the Next
button.
The IP Address Range dialog box displays.
- Define the range of IP Addresses used by the IP telephones
listed in Table 2: 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.
- Define the subnet mask in one of two ways:
- The number of bits of an IP Address to use for the
network/subnet IDs.
- The subnet mask IP Address.
Enter only one of these values. When you finish, click the
Next button.
The Add Exclusions dialog box displays.
- Exclude any IP Addresses in the range specified in the previous
step that you do not want assigned to an IP telephone.
- In the Start Address field under
Exclusion Range, enter the first IP
Address in the range you want to exclude.
- In the End Address field under
Exclusion Range, enter the last IP
Address in the range you want to exclude.
- Click the Add button.
- 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:
-
- 135.254.76.7 to 135.254.76.80
- 135.254.76.90 to 135.254.76.200
- 135.254.76.225 to 135.254.76.230
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:
-
- 135.254.76.81 to 135.254.76.89
- 135.254.76.201 to 135.254.76.224
Click the Next button after you enter all the
exclusions.
The Lease Duration dialog box displays.
- 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.
- Click the Next button.
The Configure DHCP Options dialog box
displays.
- Click the No, I will activate this scope later
button.
The Router (Default Gateway) dialog box
displays.
- 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.
- 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.
- Highlight the newly created scope and select
Action-->Properties from the
menu.
- Under Lease duration for DHCP clients, select
Unlimited and then click the OK
button.
CAUTION: IP Address leases are kept active for varying periods
of time. To avoid having calls terminated suddenly, make the lease
duration unlimited.