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4600 Series IP Telephone LAN Administrator’s Guide
DHCP
4-14
7. Define the range of IP addresses used by the IP telephones listed in item 7 in Table 4-2· The
Start IP Address should be the first IP address available to the IP telephones. The End IP
Address should be the last IP address available to the IP telephones.
8. You may 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. Click the Next button when finished.
The Add Exclusions dialog box is displayed.
9. Exclude any IP addresses in the range specified in the previous step that you do not wish to be
assigned to an IP telephone.
a. Enter the first IP address in the range that you would like to exclude in the Start Address
field under Exclusion Range.
b. Enter the last IP address in the range that you would like to exclude in the End Address
field under Exclusion Range.
c. Click the Add button.
d. Repeat steps a. through c. for each IP Address range that you would like to exclude.
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
Your Start IP Address and End IP Address entered on the IP Address Range dialog box
should then be 135.254.76.7 and 135.254.76.230 respectively.
On the Add Exclusions dialog box, you should 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 when all the exclusions have been entered.
The Lease Duration dialog box is displayed.
10. Enter 30 days in the lease duration for all telephones that will receive their IP addresses from
the server. This is the duration after which a device’s IP address expires and needs to be
renewed by the device.
11. Click the Next button.
The Configure DHCP Options dialog box is displayed.
You may add additional exclusion ranges later by right clicking on the Address Pool
under the newly created scope and select the New Exclusion Range option.