ZyXEL ADSL Prestige 2602R-61 VoIP 91-006-024004B Manual Do Utilizador

Prestige 2602R Series User’s Guide

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Chapter 4 LAN Setup

The following figure depicts a scenario where a computer is set to use a static private IP 
address in the corporate environment. In a residential house where a Prestige is installed, you 
can still use the computer to access the Internet without changing the network settings, even 
when the IP addresses of the computer and the Prestige are not in the same subnet. 

Figure 24   Any IP Example

The Any IP feature does not apply to a computer using either a dynamic IP address or a static 
IP address that is in the same subnet as the Prestige’s IP address.

Note: You must enable NAT/SUA to use the Any IP feature on the Prestige. 

Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP 
address) to a physical machine address, also known as a Media Access Control or MAC 
address, on the local area network. IP routing table is defined on IP Ethernet devices (the 
Prestige) to decide which hop to use,

 

to help forward data along to its specified destination.

The following lists out the steps taken, when a computer tries to access the Internet for the first 
time through the Prestige.

1 When a computer (which is in a different subnet) first attempts to access the Internet, it 

sends packets to its default gateway (which is not the Prestige) by looking at the MAC 
address in its ARP table. 

2 When the computer cannot locate the default gateway, an ARP request is broadcast on the 

LAN. 

3 The Prestige receives the ARP request and replies to the computer with its own MAC 

address. 

4 The computer updates the MAC address for the default gateway to the ARP table. Once 

the ARP table is updated, the computer is able to access the Internet through the Prestige.