CCNA 4.2: Configure, verify, and troubleshoot PPPoE client-side interfaces using local authentication

Overview

Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol (layer 2.5?) used to encapsulate PPP frames inside of Ethernet frames.

Study Notes:

PPP was prevalent in the 80s and 90s. It was typically used to connect a home PC to a server at the ISP over a 56k modem phone line connection.
Point-to-Point over Ethernet was created to solve a problem that resulted from technological advancement.
As the internet expanded, the demand for higher bandwidth networks increased and more than one connection was needed from each home, PPPoE was the solution.
Where PPP only connected one client to one server and did so over serial links, PPPoE can connect multiple clients to the server and does so over broadband.
Ethernet links do not natively support PPP
Similar to PPP, PPPoE also offers authentication, encryption and compression
PPPoE allows the sending of PPP frames encapsulated inside Etherent frames
Since Ethernet is a multi-access medium, PPPoE should figure out both ends MAC addresses so they can be encoded in the PPP control packet headers
Typically, you'll want to lower the MTU to 1492 since PPP adds 2 Bytes and PPPoE addes 6 Bytes of overhead -> 1500-8 = 1492

Labs:

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