A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Maintenance Working Group of the IETF.
Title : UDP Checksums for Tunneled Packets
Author(s) : Marshall Eubanks
P.F. Chimento
Magnus Westerlund
Filename : draft-ietf-6man-udpchecksums-05.txt
Pages : 11
Date : 2012-10-22
Abstract:
This document provides an update of the Internet Protocol version 6
(IPv6) specification (RFC2460) to improve the performance of IPv6 in
the use case when a tunnel protocol uses UDP with IPv6 to tunnel
packets. The performance improvement is obtained by relaxing the
IPv6 UDP checksum requirement for suitable tunneling protocol where
header information is protected on the "inner" packet being carried.
This relaxation removes the overhead associated with the computation
of UDP checksums on IPv6 packets used to carry tunnel protocols and
thereby improves the efficiency of the traversal of firewalls and
other network middleboxes by such protocols. We describe how the
IPv6 UDP checksum requirement can be relaxed in the situation where
the encapsulated packet itself contains a checksum, the limitations
and risks of this approach, and define restrictions on the use of
this relaxation to mitigate these risks.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-udpchecksums
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-6man-udpchecksums-05
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-6man-udpchecksums-05
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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