Ip Address Assignment Conflicts; Case A: The Zyxel Device Is Using The Same Lan And Wan Ip Addresses; Case B: The Zyxel Device Lan Ip Address Conflicts With The Dhcp Client Ip Address; Figure 221 Ip Address Conflicts: Casea - ZyXEL Communications ZyAir G-2000 PlusV2 User Manual

IP Address Assignment Conflicts

This appendix describes situations where IP address conflicts may occur. Subscribers with
duplicate IP addresses will not be able to access the Internet.
Case A: The ZyXEL device is using the same LAN and WAN IP
addresses
The following figure shows an example where the ZyXEL device is using a WAN IP address
that is the same as the IP address of a computer on the LAN.

Figure 221 IP Address Conflicts: CaseA

You must set the ZyXEL device to use different LAN and WAN IP addresses on different
subnets if you enable DHCP server on the ZyXEL device. 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
ZyXEL device use a public WAN IP address.
Case B: The ZyXEL device LAN IP address conflicts with the
DHCP client IP address
In the following figure, the ZyXEL device is acting as a DHCP server. The ZyXEL device
assigns an IP address, which is the same as its LAN port IP address, to a DHCP client attached
to the LAN.
ZyXEL G-2000 Plus v2 User's Guide
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