RE: PPP over IPSec (without L2TP)?

"Shriver, John" <john.shriver@intel.com> Thu, 14 October 1999 14:14 UTC

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From: "Shriver, John" <john.shriver@intel.com>
To: 'Ari Huttunen' <Ari.Huttunen@datafellows.com>, ietf-ipsra@vpnc.org, ipsec@lists.tislabs.com
Subject: RE: PPP over IPSec (without L2TP)?
Date: Thu, 14 Oct 1999 05:33:51 -0700
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L2TP provides the prevention of packet reordering that is REQUIRED by PPP.
The PPP protocol assumes that packets under it will never be reordered.  PPP
would not work directly on top of IPSec, since IPSec does not offer a
service with any assurance of packet ordering.

The optional flow control for L2TP can also be used wisely to provide better
performance (lower packet loss).

Also, on Windows Dial-Up Networking, it provides a comfortable user model.
This is not to be taken lightly.