Setting Optional Network Dhcp Address Reservations; Configuring The Optional Network For Dhcp Relay - Watchguard Firebox X20E User Manual

If you have a WINS or DNS server, type the WINS Server Address, DNS Server Primary Address,
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DNS Server Secondary Address, and DNS Domain Suffix in the related fields.
If you do not enter a value, the Firebox X Edge uses the same values as those used for the
external network.
Click Submit.
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Setting optional network DHCP address reservations

You can manually assign an IP address to a specified computer on your optional network. The
Firebox X Edge identifies the computer by its MAC address.
Use your browser to connect to the System Status page. From the navigation bar, select
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Network > Optional.
The Optional Network Configuration page appears.
Click the DHCP Reservations button.
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The DHCP Address Reservations page appears.
Type a static IP address in the IP Address field. The IP address must be on the optional network.
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For example, if the optional network starts with 192.168.112.1, you can enter 192.168.112.2 to
192.168.112.251.
Type the MAC address of the computer on the optional network in the MAC Address field. You
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must enter the MAC address as 12 hexadecimal digits with no space, dash, or semicolon
characters. Click Add.
Click Submit.
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Configuring the optional network for DHCP relay

One method to get IP addresses for the computers on the Firebox X Edge optional network is to use a
DHCP server on a different network. The Edge can send a DHCP request to a DHCP server at a different
location and transmit the reply to the computers on the optional network. This option lets computers
in more than one office use the same network address range. In this procedure, the Edge is a DHCP
Relay Agent.
User Guide
Configuring the Optional Network
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