ZyXEL Communications VSG-1000 User Manual

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VSG-1000 Vantage Service Gateway 
B  
IP Address Assignment Conflicts 
Case D: Two or more subscribers have the same IP address.  
By converting all private IP addresses to the WAN IP address, the VSG 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 VSG DHCP server assigns to another subscriber acting as a DHCP client. 
In this case, the subscribers are not able to access the Internet.  
 
Diagram 4 IP Address Conflicts: Case D 
This problem can be solved by adding a VLAN-enabled switch or set the computers to obtain IP addresses 
dynamically.