ZyXEL G-1000 v2 User’s Guide
To solve this problem, make sure the G-1000 v2 LAN IP address is not in the DHCP IP address pool.
Case C: The Subscriber IP address is the same as the IP address of a network device
The following figure depicts an example where the subscriber IP address is the same as the IP address of a network device not attached to the G-1000 v2.
Figure 94 IP Address Conflicts: Case C
You must set the G-1000 v2 to use different LAN and WAN IP addresses on different subnets if you enable DHCP server on the G-1000 v2. For example, you set the WAN IP address to
192.59.1.1and the LAN IP address to 10.59.1.1. Otherwise, It is recommended the G-1000 v2 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 G-1000 v2 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 G-1000 v2 DHCP server assigns to another subscriber acting as a DHCP client.
In this case, the subscribers are not able to access the Internet.