User's Manual

Chapter 6 WAN Setup

AMG1202-T10A User’s Guide

networks. It can be static (fixed) or dynamically assigned by the ISP each time the ZyXEL 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).

Multicast

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

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.

Finding Out More

See Section 6.4 on page 79 for technical background information on WAN.

6.1.3 Before You Begin

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

information from your ISP.