Zyxel-communications P-661H Series Uživatelský manuál stáhnout pdf (Strana 77)

P-661H/HW Series User’s Guide

Chapter 4 WAN Setup 77

CHAPTER 4

WAN Setup

This chapter describes how to configure WAN settings.

4.1 WAN Overview

A WAN (Wide Area Network) is an outside connection to another network or the Internet.

4.1.1 Encapsulation

Be sure to use the encapsulation method required by your ISP. The ZyXEL Device supports

the following methods.

4.1.1.1 ENET ENCAP

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 ENET ENCAP Gateway field in the

second wizard screen. You can get this information from your ISP.

4.1.1.2 PPP over Ethernet

PPPoE (Point-to-Point Protocol over Ethernet) provides access control and billing

functionality in a manner similar to dial-up services using PPP. PPPoE is an IETF standard

(RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem

(DSL, cable, wireless, etc.) connection.

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.

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Zyxel-communications P-661H Series Uživatelský manuál Strana 77