ZyXEL Communications AMG1302 Manual Do Utilizador

Chapter 6 Broadband

AMG1302/AMG1202-TSeries User’s Guide

This section provides some technical background information about the topics covered in this 
chapter.

Be sure to use the encapsulation method required by your ISP. The AMG1302/AMG1202-TSeries 
supports the following methods.

The MAC Encapsulated Routing Link Protocol (ENET ENCAP) is only implemented with the IP 
network protocol. IP packets are routed between the Ethernet interface and the WAN interface and 
then formatted so that they can be understood in a bridged environment. For instance, it 
encapsulates routed Ethernet frames into bridged ATM cells. ENET ENCAP requires that you specify 
a gateway IP address in the Gateway IP Address field in the wizard or WAN screen. You can get 
this information from your ISP.

The AMG1302/AMG1202-TSeries supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is 
an IETF Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a 
broadband modem (DSL, cable, wireless, etc.) connection. The PPPoE option is for a dial-up 
connection using PPPoE.

For the service provider, PPPoE offers an access and authentication method that works with existing 
access control systems (for example RADIUS).

One of the benefits of PPPoE is the ability to let you access one of multiple network services, a 
function known as dynamic service selection. This enables the service provider to easily create and 
offer new IP services for individuals.

Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no 
specific configuration of the broadband modem at the customer site.

By implementing PPPoE directly on the AMG1302/AMG1202-TSeries (rather than individual 
computers), the computers on the LAN do not need PPPoE software installed, since the AMG1302/

MTU

The Maximum Transmission Unit (MTU) defines the size of the largest packet allowed on an 
interface or connection. Enter the MTU in this field.

For ENET ENCAP, the MTU value is 1500.

For PPPoE, the MTU value is 1492.

For PPPoA and RFC, the MTU is 100-1500.

Apply

Click this to save your changes. 

Cancel

Click this to restore your previously saved settings.

Network Setting > Broadband > More Connections: Edit: Advanced Setup (continued)