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IAD User’s Guide
55
C
H A P T E R
6
WAN
6.1 Overview
This chapter describes how to configure WAN settings. A WAN (Wide Area
Network) is an outside connection to another network or the Internet.
6.1.1 What You Need to Know
The following terms and concepts may help as you read through the chapter.
Encapsulation
Be sure to use the encapsulation method required by your ISP. The IAD supports
the following methods.
PPP over Ethernet
The IAD 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 IAD (rather than individual computers), the
computers on the LAN do not need PPPoE software installed, since the IAD does
that part of the task.