Re: A problem with RFC 6465's Uniform Format for Extension Headers

Hi Fernando,

On Fri, Jan 31, 2014 at 2:02 AM, Fernando Gont <fgont@si6networks.com> wrote:
> Mike Heard noted that the Uniform Format specified in RFC 6465 can't
> possibly work.. and after giving some thought about it, it turns out
> that implementing it would hamper the deployment of new transport protocols.
>
> We've written a short I-D that discussed the problem, and that proposes
> an alternative, such that we achieve the same goal without possibly
> messing with our Transport friends. :-)
>
> The I-D is available at:
> <http://www.ietf.org/internet-drafts/draft-gont-6man-ipv6-universal-extension-header-00.txt>

Somehow that proposed Universal Extension Header looks exactly like an
Options Extension Header to me.
Am I missing something? I'm trying to use my imagination but couldn't
see any possible scenario when UEH would work and Options header would
not.

> -------- Original Message --------
> Subject: New Version Notification for
> draft-gont-6man-ipv6-universal-extension-header-00.txt
> Date: Thu, 30 Jan 2014 15:07:40 -0800
> From: internet-drafts@ietf.org
> To: Fernando Gont <fgont@si6networks.com>, "Fernando Gont"
> <fgont@si6networks.com>, "Shucheng LIU (Will)" <liushucheng@huawei.com>,
> Will (Shucheng) Liu <liushucheng@huawei.com>
>
>
> A new version of I-D, draft-gont-6man-ipv6-universal-extension-header-00.txt
> has been successfully submitted by Fernando Gont and posted to the
> IETF repository.
>
> Name:           draft-gont-6man-ipv6-universal-extension-header
> Revision:       00
> Title:          IPv6 Universal Extension Header
> Document date:  2014-01-31
> Group:          Individual Submission
> Pages:          6
> URL:
> http://www.ietf.org/internet-drafts/draft-gont-6man-ipv6-universal-extension-header-00.txt
> Status:
> https://datatracker.ietf.org/doc/draft-gont-6man-ipv6-universal-extension-header/
> Htmlized:
> http://tools.ietf.org/html/draft-gont-6man-ipv6-universal-extension-header-00
>
>
> Abstract:
>    This document analyzes a problem in the Uniform Format for IPv6
>    Extension Headers specified in RFC 6564, which results in forwarding
>    nodes and middle-boxes not being able to process an IPv6 Header Chain
>    if it contains an unrecognized IPv6 Extension Header that follows the
>    aforementioned Uniform Format.  Additionally, it specifies a new IPv6
>    Extension Header - the Universal Extension Header - that overcomes
>    the aforementioned problem, and enables the extensibility of IPv6
>    without impairing middleboxes that need to process the entire IPv6
>    Header Chain.  Finally, this document formally updates RFC 6564
>
>
>
>
>
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> The IETF Secretariat
>
>
>
>
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-- 
SY, Jen Linkova aka Furry