Hello,
I have posted a new draft that calls for an update to RFC2460.
The document proposes to enlist the support of IPv6 hosts in
offloading the burden carried by links that must perform
link-specific fragmentation/reassembly per RFC2460, Section 5:
"IPv6 requires that every link in the internet have an MTU of 1280
octets or greater. On any link that cannot convey a 1280-octet
packet in one piece, link-specific fragmentation and reassembly must
be provided at a layer below IPv6."
The draft announcement appears below. Please review and send
comments to the list.
Fred
fred.l.temp...@boeing.com
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : IPv6 Source Fragmentation for Link Adaptation
Avoidance
Author(s) : Fred L. Templin
Filename : draft-generic-6man-tunfrag-02.txt
Pages : 5
Date : 2012-07-05
Abstract:
IPv6 intentionally deprecates fragmentation by routers in the
network. Instead, links with restricting MTUs must either drop each
too-large packet and return an ICMP Packet Too Big message or perform
link-specific fragmentation (also known as "link adaptation") at a
layer below IPv6. This latter category of links is often
performance-challenged to accommodate steady-state link-specific
fragmentation to the point that it would be highly desirable to push
the fragmentation burden back to the IPv6 source. A common case that
exhibits these link characteristics is seen for IPv6-within-IP
tunnels. This document therefore proposes an update to the base IPv6
specification to support link adaptation avoidance.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-generic-6man-tunfrag
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-generic-6man-tunfrag-02
A diff from previous version is available at:
http://tools.ietf.org/rfcdiff?url2=draft-generic-6man-tunfrag-02
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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