Point-to-Point Protocol over Ethernet (PPPoE) connections use a virtual line to send PPP data (through an Ethernet adapter) to a Digital Subscriber Line (DSL) modem that is provided by your Internet service provider (ISP). The modem is also connected to the Ethernet-based LAN.
This enables high-speed Internet access for LAN users through PPP sessions on the i5/OS® operating system. After the connection between the system and the ISP has started, individual users on the LAN can start unique sessions with the ISP over PPPoE.
PPPoE connections are only used by originator connection profiles. The connections imply an Initiator operating mode and use only a single line.