Configuring DHCP Server Options

If desired, you can configure the following custom DHCP options for an internal network:

Domain suffix
DNS servers
WINS servers
Default gateway
NTP servers
VoIP call managers
TFTP server and boot filename
Avaya, Nortel, and Thomson IP phone configuration strings

To configure DHCP options

Click Network in the main menu, and click the My Network tab.
The My Network page appears.
In the desired network's row, click Edit.
The Edit Network Settings page appears.
In the DHCP area, click Options.
The DHCP Server Options page appears.
Complete the fields using the relevant information in the following table.
New fields appear, depending on the check boxes you selected.
Click Apply.
If your computer is configured to obtain its IP address automatically (using DHCP), restart your computer.
Your computer obtains an IP address in the DHCP address range.

DHCP Server Options Fields

In this field…	Do this…
Domain Name	Type a default domain suffix that should be passed to DHCP clients. The DHCP client will automatically append the domain suffix for the resolving of non-fully qualified names. For example, if the domain suffix is set to "mydomain.com", and the client tries to resolve the name "mail", the suffix will be automatically appended to the name, resulting in "mail.mydomain.com".
Name Servers
Automatically assign DNS server (recommended)	Clear this option if you do not want the gateway to act as a DNS relay server and pass its own IP address to DHCP clients. Normally, it is recommended to leave this option selected. The DNS Server 1 and DNS Server 2 fields appear.
DNS Server 1, 2	Type the IP addresses of the Primary and Secondary DNS servers to pass to DHCP clients instead of the gateway.
Automatically assign WINS server	Clear this option if you do not want DHCP clients to be assigned the same WINS servers as specified by the Internet connection configuration (in the Internet Setup page). The WINS Server 1 and WINS Server 2 fields appear.
WINS Server 1, 2	Type the IP addresses of the Primary and Secondary WINS servers to use instead of the gateway.
Automatically assign default gateway	Clear this option if you do not want the DHCP server to pass the current gateway IP address to DHCP clients as the default gateway's IP address. Normally, it is recommended to leave this option selected.The Default Gateway field is enabled.
Default Gateway	Type the IP address to pass to DHCP clients as the default gateway, instead of the current gateway IP address.
Other Services
Time Server 1, 2	To use Network Time Protocol (NTP) servers to synchronize the time on the DHCP clients, type the IP address of the Primary and Secondary NTP servers.
Call Manager 1, 2	To assign Voice over Internet Protocol (VoIP) call managers to the IP phones, type the IP address of the Primary and Secondary VoIP servers.
TFTP Server	Trivial File Transfer Protocol (TFTP) enables booting diskless computers over the network. To assign a TFTP server to the DHCP clients, type the IP address of the TFTP server.
TFTP Boot File	Type the boot file to use for booting DHCP clients via TFTP.
X-Windows Display Manager	To assign X-Windows terminals the appropriate X-Windows Display Manager when booting via DHCP, type the XDM server's IP address.
Avaya IP Phone	To enable Avaya IP phones to receive their configuration, type the phone's configuration string.
Nortel IP Phone	To enable Nortel IP phones to receive their configuration, type the phone's configuration string.
Thomson IP Phone	To enable Thomson IP phones to receive their configuration, type the phone's configuration string.