I-D ACTION:draft-ietf-pppext-l2tp-sec-01.txt

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 A Revised Internet-Draft is available from the on-line Internet-Drafts 
 directories. This draft is a work item of the Point-to-Point Protocol 
 Extensions Working Group of the IETF.                                     

       Title     : Layer Two Tunneling Protocol "L2TP" Security Extensions 
                   for Non-IPSEC networks                                  
       Author(s) : Pat Calhoun, W. Mark Townsley
       Filename  : draft-ietf-pppext-l2tp-sec-01.txt
       Pages     : 13
       Date      : 07/02/1997

The L2TP document [1] defines the base protocol which describes the method 
of tunneling PPP [2] data. The L2TP document states that the security 
mechanism used over an IP network is to use the IETF's IPSEC protocols.  

L2TP was designed in such a way as to be able to run over any underlying 
layer (i.e. Frame Relay, ATM, etc.). This document specifies extensions to 
the L2TP protocol in order to provide authentication and integrity of 
individual packets in a tunneled session over a network where IPSEC or 
another suitable security protocol is not available.                       

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