RFC Errata System | 4 Apr 2011 16:19
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[Editorial Errata Reported] RFC3931 (2766)


The following errata report has been submitted for RFC3931,
"Layer Two Tunneling Protocol - Version 3 (L2TPv3)".

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You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=3931&eid=2766

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Type: Editorial
Reported by: Teco Boot <teco <at> inf-net.nl>

Section: 4.1.4

Original Text
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   An LCCE MAY fragment a packet before encapsulating it in L2TP.  For
   example, if an IPv4 packet arrives at an LCCE from a Remote System
   that, after encapsulation with its associated framing, L2TP, and IP,
   does not fit in the available path MTU towards its LCCE peer, the
   local LCCE may perform IPv4 fragmentation on the packet before tunnel
   encapsulation. 

Corrected Text
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   An LCCE MAY fragment a packet before encapsulating it in L2TP.  For
   example, if an IPv4 packet with DF=0 arrives at an LCCE from a Remote System
   that, after encapsulation with its associated framing, L2TP, and IP,
   does not fit in the available path MTU towards its LCCE peer, the
   local LCCE may perform IPv4 fragmentation on the packet before tunnel
   encapsulation. 

Notes
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Following RFC 791, IPv4 packets with the DF flag set shall not fragment such packets. RFC 3931 shall not make
a precedent for fragmenting IPv4 packets with DF=1.

Instructions:
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RFC3931 (draft-ietf-l2tpext-l2tp-base-15)
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Title               : Layer Two Tunneling Protocol - Version 3 (L2TPv3)
Publication Date    : March 2005
Author(s)           : J. Lau, Ed., M. Townsley, Ed., I. Goyret, Ed.
Category            : PROPOSED STANDARD
Source              : Layer Two Tunneling Protocol Extensions
Area                : Internet
Stream              : IETF
Verifying Party     : IESG

Gmane