ZyXEL Communications P-660 series Betriebsanweisung PDF herunterladen (Seite 43)

P-660R-F1 Series User’s Guide 43

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.

By implementing PPPoE directly on the ZyXEL Device (rather than individual computers), the

computers on the LAN do not need PPPoE software installed, since the ZyXEL Device does that part

of the task. Furthermore, with NAT, all of the LANs’ computers will have access.

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ZyXEL Communications P-660 series Betriebsanweisung Seite 43