3com 3031 Instruccion De Instalación
19
PPP
O
E C
LIENT
C
ONFIGURATION
Introduction to PPPoE
Client
Client
PPPoE
PPPoE is the abbreviation for Point-to-Point Protocol over Ethernet. It connects an
Ethernet host to a remote access concentrator via a simple bridging device.
Through PPPoE, a remote access device can realize control and accounting over
each accessing user. Comparing with traditional access method, PPPoE has higher
performance-price ratio, thus widely assumed in applications including community
networking, etc. It is also adopted in the currently popular wide band access mode
ADSL.
Ethernet host to a remote access concentrator via a simple bridging device.
Through PPPoE, a remote access device can realize control and accounting over
each accessing user. Comparing with traditional access method, PPPoE has higher
performance-price ratio, thus widely assumed in applications including community
networking, etc. It is also adopted in the currently popular wide band access mode
ADSL.
PPPoE employs Client / Server mode, in which it encapsulates PPP packets into
Ethernet frames and provides point-to-point connection over the Ethernet.
Ethernet frames and provides point-to-point connection over the Ethernet.
PPPoE has two different phases: Discovery phase and PPP Session phase.
Discovery phase
When a host initiates a PPP session, it must confirm the peer Ethernet MAC
address through the Discovery phase and create a PPPoE session ID. Different from
PPP, the Discovery phase of PPPoE creates a Client/Server relationship rather than
the peer relationship created by PPP. During the Discovery phase, a host (Client)
can discover an access concentrator (Server). After the Discovery phase, the host
and the concentrator can establish PPPoE session via the MAC address and session
ID.
address through the Discovery phase and create a PPPoE session ID. Different from
PPP, the Discovery phase of PPPoE creates a Client/Server relationship rather than
the peer relationship created by PPP. During the Discovery phase, a host (Client)
can discover an access concentrator (Server). After the Discovery phase, the host
and the concentrator can establish PPPoE session via the MAC address and session
ID.
PPP Session phase
At the beginning of PPP Session phase, the host and access concentrator transmit
PPP data, perform various PPP negotiations and data transfer over PPP. PPP
packets, as the payload of PPPoE frames, are encapsulated into Ethernet frames
and sent to the peer of a PPPoE link. In this case, all Ethernet frames are unicast.
PPP data, perform various PPP negotiations and data transfer over PPP. PPP
packets, as the payload of PPPoE frames, are encapsulated into Ethernet frames
and sent to the peer of a PPPoE link. In this case, all Ethernet frames are unicast.
For more information about PPPoE, please refer to RFC2516.
Introduction to PPPoE client
PPPoE is widely used in ADSL broadband access applications. Generally speaking,
a host must be installed with PPPoE client dialing software in order to access the
Internet via ADSL. 3Com R series routers realize PPPoE Client function (namely the
PPPoE client dialing function), by which the user can access the Internet without
installing client dialing software on his PC. Moreover, all PCs on the same LAN can
share the same ADSL account.
a host must be installed with PPPoE client dialing software in order to access the
Internet via ADSL. 3Com R series routers realize PPPoE Client function (namely the
PPPoE client dialing function), by which the user can access the Internet without
installing client dialing software on his PC. Moreover, all PCs on the same LAN can
share the same ADSL account.