L2TP-over-IP Path MTU Discovery (''L2TPMTU'')

Document Type Expired Internet-Draft (pppext WG)
Author Richard Shea 
Last updated 1998-01-05
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Layer Two Tunneling Protocol (L2TP) defines a mechanism for tunneling PPP over arbitrary media. When IPv4 or IPv6 over PPP is tunneled over L2TP, it is desirable to avoid fragmentation of the L2TP data channel packets when L2TP is run over IP. This document describes a mechanism for L2TP-over-IP to avoid fragmentation of tunneled IPv4 and IPv6 datagrams by leveraging IPv4 and IPv6 path MTU discovery mechanisms.


Richard Shea (rshea@newoak.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)