NationMaster - Encyclopedia: PPPoE

PPPoE, point-to-point protocol over Ethernet, is a network protocol for encapsulating PPP frames in Ethernet frames. It is used mainly with cable modem and DSL services. It offers standard PPP features such as authentication, encryption, and compression. Unfortunately it has a MTU lower than that of standard ethernet which can sometimes cause problems with badly configured firewalls. In computing, the Point-to-Point Protocol, or PPP, is commonly used to establish a direct connection between two nodes. ... Ethernet is a frame-based computer networking technology for local area networks (LANs). ... In networking, a communications protocol or network protocol is the specification of a set of rules for a particular type of communication. ... In computing, the Point-to-Point Protocol, or PPP, is commonly used to establish a direct connection between two nodes. ... Ethernet is a frame-based computer networking technology for local area networks (LANs). ... A cable modem is a special type of modem that is designed to modulate a data signal over cable television infrastructure. ... A typical DSL Modem Digital Subscriber Line, or DSL, is a family of technologies that provide digital data transmission over the wires used in the last mile of a local telephone network. ... MTU is a three-letter abbreviation that can stand for: MTU Aero Engines, formerly a DaimlerChrysler division known as MTU München, an aircraft engine manufacturer MTU Friedrichshafen, a current division of DaimlerChrysler Maximum Transfer Unit, a networking term relating to packet size Michigan Technological University This is a disambiguation page... Firewall refers to: Firewall (computing) Firewall (construction) Firewall (networking) Firewall (film) Firewall (novel) (by Henning Mankell, featuring Kurt Wallander) This is a disambiguation page, a list of pages that otherwise might share the same title. ...

PPPoE is a tunnel protocol which allows one to layer IP over a connection between two Ethernet ports, but with the software features of a PPP link, so it is used to virtually "dial" to another Ethernet machine and make a "serial" connection with it, which is then used to transport IP packets, based on the features of PPP.

It allows the use of traditional PPP-based software to handle a connection which does not use a serial line, but a packet-oriented network like Ethernet, to provide a classical connection with login and password for internet connection accounting. Also, the IP address on the other side of the link is only assigned when the PPPoE connection is open, allowing the dynamic reuse of IP addresses.

PPPoE is the protocol used by Bell Sympatico and many other DSL/ADSL carriers for connecting high-speed modems to the service provider. Bell Sympatico is the consumer-side Internet service provider division of Bell Canada. ... DSL is a TLA that can stand for: Digital Subscriber Line Damn Small Linux Domain-specific language Divers Sign Language A derivation of American Sign Language which scuba divers use to communicate underwater This page concerning a three-letter acronym or abbreviation is a disambiguation page â€” a navigational aid which... Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional modem can provide. ...

PPPoE was developed by UUNET, Redback Networks, and RouterWare. The protocol is specified in RFC 2516. UUNET Technologies Logo Post-WorldCom UUNET Logo UUNET is one of the industrys oldest and largest Internet Service Providers. ... Redback Networks, Inc. ... A Request for Comments (RFC) document is one of a series of numbered Internet informational documents and standards very widely followed by both commercial software and freeware in the Internet and Unix communities. ...

Note that some vendors (Cisco in particular) refer to this protocol as PPPoEoE (PPPoE over Ethernet), in order to distinguish it from PPPoEoA (PPPoE over ATM).

External links

RFC 2516 - A Method for Transmitting PPP Over Ethernet (PPPoE)
RFC 3817 - Layer 2 Tunneling Protocol (L2TP) Active Discovery Relay for PPP over Ethernet (PPPoE)

Categories: Tunneling protocols | Computer network stubs

Results from FactBites:

Carrick Solutions Ltd - What is PPPoE? (1193 words)
	PPPoE is used to allow Internet Service Providers (ISPs) the use of their existing Radius authentication systems from their Dial-Up service on a Broadband / Ethernet based service.
	This is no longer the case they are using their on PPPoE application but it is “standards” compliant.
	The PPPoE server, or Access Concentrator, should respond to the PADI with a PADO if the Access Concentrator is able to service the "service-name" field that had been listed in the PADI packet.

NetBSD Documentation: Steps to connect via PPPoE (DSL) (0 words)
	First we create the pppoe interface itself and assign dummy IP numbers to it, which will be replaced later during PPP negotiation.
	Next we attach the pppoe interface to the Ethernet interface used to connect the DSL modem.
	For connections originating from your PPPoE connected machines, this is accomplished by setting the sysctl variable net.inet.tcp.mss_ifmtu to 1, i.e.

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