ZyXEL P-660HW-T1 User Manual download pdf (Page 93)

P-660H/HW/W-T Series User’ Guide

93 Chapter 6 WAN Setup

For example, if the normal route has a metric of "1" and the traffic-redirect route has a metric

of "2" and dial-backup route has a metric of "3", then the normal route acts as the primary

default route. If the normal route fails to connect to the Internet, the Prestige tries the traffic-

redirect route next. In the same manner, the Prestige uses the dial-backup route if the traffic-

redirect route also fails.

If you want the dial-backup route to take first priority over the traffic-redirect route or even the

normal route, all you need to do is set the dial-backup route’s metric to "1" and the others to

"2" (or greater).

IP Policy Routing overrides the default routing behavior and takes priority over all of the

routes mentioned above.

6.3 PPPoE Encapsulation

The Prestige 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). PPPoE provides a login and

authentication method that the existing Microsoft Dial-Up Networking software can activate,

and therefore requires no new learning or procedures for Windows users.

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 Prestige (rather than individual computers), the

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

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

6.4 Traffic Shaping

Traffic Shaping is an agreement between the carrier and the subscriber to regulate the average

rate and fluctuations of data transmission over an ATM network. This agreement helps

eliminate congestion, which is important for transmission of real time data such as audio and

video connections.

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ZyXEL P-660HW-T1 User Manual Page 93