ZyXEL Communications ZyWall 35 Support Notes page 20

1. Each interface own an independent subnet. For example, LAN is 1.1.1.x/24, DMZ is
2.2.2.x/24, and WLAN is 3.3.3.x/24.
2. When choosing DHCP setting as 'None', the LAN/DMZ/WLAN will NOT assign IP address
to the associated hosts. Client PCs need to configure IP address manually.
3. When choosing DHCP setting as a 'Server', the LAN/DMZ/WLAN will automatically assign
IP, subnet, gateway and DNS to the associated clients.
4. When choosing DHCP setting as a 'Relay', the LAN/DMZ/WLAN will forward the DHCP
request to another DHCP server.
5. There are 4 ports could be flexibly assigned to be LAN or DMZ or WLAN port. To assign a
port to WLAN, user needs to insert a proper wireless card (ex. ZyAIR G-100) and enable wireless
from GUI >> network >> Wireless Card. After assigning a port to WLAN, the hosts connected
to the port will be in the same subnet as other wireless clients which associate to the ZyWALL.
Generally speaking, it's especially for troubleshooting or user wants to dedicate a server for
wireless network use only.
Following is an example to configure LAN as a DHCP relay, DMZ as a DHCP server, and WLAN as a DHCP
server. In this example, since network admin would like to central manage IP address of all LAN hosts. There is
a DHCP server (IP: 10.10.1.1) to handle all DHCP request from LAN hosts. So ZyWALL will be configured as
a relay role to pass DHCP request from LAN to the DHCP server. For DMZ, and WLAN, network admin
would like to configure them as independent subnet.
All contents copyright (c) 2006 ZyXEL Communications Corporation.
ZyWALL 35 Support Notes
20