ZyXEL Communications Corporation AMG1302 Manuale Utente

Chapter 6 WAN Setup

AMG1302-T10A User’s Guide

The WAN IP address is an IP address for the Device, which makes it accessible from an outside 

network. It is used by the Device to communicate with other devices in other networks. It can be 

static (fixed) or dynamically assigned by the ISP each time the Device tries to access the Internet.

If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and 

DNS server IP address(es) (and a gateway IP address if you use the Ethernet or ENET ENCAP 

encapsulation method).

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient) 

or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of 

hosts on the network - not everybody and not just one.

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership 

in a Multicast group - it is not used to carry user data. There are three versions of IGMP. IGMP 

version 2 and 3 are improvements over version 1, but IGMP version 1 is still in wide use.

See 

 for technical background information on WAN.

You need to know your Internet access settings such as encapsulation and WAN IP address. Get this 

information from your ISP.