Acronym for the PPP over Ethernet protocol, defined in RFC:2516.
A simple protocol, designed to allow discovery of AccessConcentrators and end-point services they provide.
The five packet types used by PPPoE are:
- ; PADI
PPPoE Active Discovery Initiation
- PPPoE Active Discovery Offer
- PPPoE Active Discovery Request
- PPPoE Active Discovery Session-confirmation
- PPPoE Active Discovery Terminate
Their definitions and use can be found in the RFC.
Once the discovery protocol has done the setup, the session protocol actually passes the PPP data between
the AccessConcentrator and the client.
Roaring Penguin Software have a Free implementation of the protocol that works under Linux, NetBSD/FreeBSD, and Solaris. The Debian package is pppoe.
As of 2.4.something, the Linux kernel has kernel-mode PPPoE support. The Kernel PPPoE driver typically yields lower CPU load than the Roaring Penguin client.
See LinuxPPPoENotes for more details.