User's Guide

Chapter 3 eaZy 123 Wizard
EMG3435-Q20A User’s Guide
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3.3.1 WAN Se le c tio n Type : Autom a tic - DHC P
Select the Auto ma tic - DHC P option if your ISP did not assign you a fixed IP address.
Fig ure 10 WAN Selection Type: Automatic - DHCP
3.3.2 WAN Se le c tio n Type : PPPo E
Point-to-Point Protocol over Ethernet (PPPoE) functions as a dial-up connection. PPPoE is an IETF (Internet
Engineering Task Force) standard specifying how a host personal computer interacts with a broadband
modem (for example DSL, cable, wireless, etc.) to achieve access to high-speed data networks.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for instance, RADIUS).
One of the benefits of PPPoE is the ability to let end users 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 specific users.
Operationally, PPPoE saves significant effort for both the subscriber and the ISP/carrier, as it requires no
specific configuration of the broadband modem at the subscriber's site.
By implementing PPPoE directly on the EMG3435-Q20A (rather than individual computers), the
computers on the LAN do not need PPPoE software installed, since the EMG3435-Q20A does that part of
the task. Furthermore, with NAT, all of the LAN's computers will have Internet access.