RFC 3817 on Layer 2 Tunneling Protocol (L2TP) Active Discovery Relay for PPP over Ethernet (PPPoE)

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        RFC 3817

        Title:      Layer 2 Tunneling Protocol (L2TP) Active Discovery
                    Relay for PPP over Ethernet (PPPoE)
        Author(s):  W. Townsley, R. da Silva
        Status:     Informational
        Date:       June 2004
        Mailbox:    mark@townsley.net, rdasilva@va.rr.com
        Pages:      17
        Characters: 37765
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-dasilva-l2tp-relaysvc-08.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3817.txt

The Point-to-Point Protocol (PPP) provides a standard method for
transporting multi-protocol datagrams over point-to-point links.
Layer Two Tunneling Protocol (L2TP), facilitates the tunneling of PPP
packets across an intervening packet-switched network.  And yet a
third protocol, PPP over Ethernet (PPPoE) describes how to build PPP
sessions and to encapsulate PPP packets over Ethernet.

L2TP Active Discovery Relay for PPPoE describes a method to relay
Active Discovery and Service Selection functionality from PPPoE over
the reliable control channel within L2TP.  Two new L2TP control
message types and associated PPPoE-specific Attribute Value Pairs
(AVPs) for L2TP are defined.  This relay mechanism provides enhanced
integration of a specific feature in the PPPoE tunneling protocol
with L2TP.

This document is a product of the Layer Two Tunneling Protocol
Extensions Working Group of the IETF.

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Joyce K. Reynolds and Sandy Ginoza
USC/Information Sciences Institute

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