ZyXEL Communications ZYAIR G-4100 User Manual page 210

ZyAIR G-4100 User's Guide
You must set the ZyAIR to use different LAN and WAN IP addresses on different subnets if you
enable DHCP server on the ZyAIR. For example, you set the WAN IP address to 192.59.1.1 and the
LAN IP address to 10.59.1.1. Otherwise, It is recommended the ZyAIR use a public WAN IP address.
Case D: Two or More Subscribers Have the Same IP Address.
By converting all private IP addresses to the WAN IP address, the ZyAIR allows subscribers with
different network configurations to access the Internet. However, there are situations where two or
more subscribers are using the same private IP address. This may happen when a subscriber is
configured to use a static (or fixed) IP address that is the same as the IP address the ZyAIR DHCP
server assigns to another subscriber acting as a DHCP client.
In this case, the subscribers are not able to access the Internet.
This problem can be solved by adding a VLAN-enabled switch or set the computers to obtain IP
addresses dynamically.
L
Diagram 3 IP Address Conflicts: Case C
Diagram 4 IP Address Conflicts: Case D
IP Address Assignment Conflicts