PPPoE Terms

customer premises equipment (CPE)

Device that acts as a PPPoE client in a PPPoE session—for example, a Juniper Networks device.

Logical Link Control (LLC)

Encapsulation protocol that allows transport of multiple protocols over a single ATM virtual connection.

Point-to-Point Protocol (PPP)

Encapsulation protocol for transporting IP traffic over point-to-point links.

PPP over Ethernet (PPPoE)

Network protocol that encapsulates PPP frames in Ethernet frames and connects multiple hosts over a simple bridging access device to a remote access concentrator.

PPPoE Active Discovery Initiation (PADI) packet

Initiation packet that is broadcast by the client to start the discovery process.

PPPoE Active Discovery Offer (PADO) packet

Offer packets sent to the client by one or more access concentrators in reply to a PADI packet.

PPPoE Active Discovery Request (PADR) packet

Packet sent by the client to one selected access concentrator to request a session.

PPPoE Active Discovery Session-Confirmation (PADS) packet

Packet sent by the selected access concentrator to confirm the session.

PPPoE Active Discovery Termination (PADT) packet

Packet sent by either the client or the access concentrator to terminate a session.

PPPoE over ATM

Network protocol that encapsulates PPPoE frames in Asynchronous Transfer Mode (ATM) frames for asymmetric digital subscriber line (ADSL) or symmetric high-speed DSL (SHDSL) transmission, and connects multiple hosts over a simple bridging access device to a remote access concentrator.

virtual path identifier (VPI)

An identifier of the virtual path that establishes a route between two devices in a network.

virtual channel identifier (VCI)

An identifier of the virtual channel inside a virtual path. Each virtual path identifier (VPI) can contain multiple virtual channels, each represented by a VCI.