Руководство Пользователя для Netopia 2e-h-w

Cayman 2E-H-W User’s Guide

How Your Cayman 2E-H-W Works

November 2000

PPP (Point-to-Point Protocol) over Ethernet is an emerging 
technology that lets a personal computer or network connect with 
a high-speed data network over a cable or xDSL modem.

PPPoE simplifies deployment of high-speed networks. PPPoE 
provides access to high-speed (xDSL or cable modem) networks 
while preserving familiar dial-up models for Internet access. 
Consequently, users and ISPs can transition from dial-up 
network access to PPPoE network access quickly and 
inexpensively.

PPPoE integrates easily into dial-up ISP infrastructure. Carriers 
and ISPs who are moving from a dial-up network base to a 
broadband network base can continue using their existing 
authentication, billing, access control, and IP address 
management models.

PPPoE requires no additional knowledge on the part of the end 
user other than that needed for traditional dial-up Internet 
access. Multiple users can share a broadband connection 
without additional support or training costs, making PPPoE ideal 
for small offices/home offices.

Cayman’s implementation of PPPoE is compatible with 
networking products from Shasta/Nortel, Redback Networks, 
and other standard industry PPPoE servers.

A PPPoE connection has two stages: a Discovery stage and a PPP 
Session stage. 

The Discovery stage of a PPPoE session consists of four steps:

1.

Initiation – When a host wants to open a PPPoE session, it 
sends out a PPPoE Active Discovery Initiation (PADI) broadcast 
asking any available Access Concentrators to respond. If a host