Re: [Roll] [6tisch] FW: New Version Notification for draft-thubert-6lo-routing-dispatch-00.txt

Martin Turon <mturon@nestlabs.com> Sat, 29 November 2014 19:24 UTC

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From: Martin Turon <mturon@nestlabs.com>
Date: Sat, 29 Nov 2014 11:24:34 -0800
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
Archived-At: http://mailarchive.ietf.org/arch/msg/roll/z2l357SMQgYbD6Yj32XA2zqYTAg
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Cc: Routing Over Low power and Lossy networks <roll@ietf.org>, "6tisch@ietf.org" <6tisch@ietf.org>, "6lo@ietf.org" <6lo@ietf.org>
Subject: Re: [Roll] [6tisch] FW: New Version Notification for draft-thubert-6lo-routing-dispatch-00.txt
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Hi Pascal,

I thought the call where this idea of overloading the mesh header was presented was met with general discontent.  

Also, the rfc4944 calls it the mesh header, it isn't called the mesh-under header.  The mesh header is very much in use today, and not purely for mesh-under conceptual designs.  

I would be wary of proposals that greatly alter the 6lo header, especially the dispatch bits, rather than extend it in very general ways.

Martin

> On Nov 27, 2014, at 6:03 AM, "Pascal Thubert (pthubert)" <pthubert@cisco.com> wrote:
> 
> Dear all:
> 
> This is a response to the question about the compression of RFC 6553 on top of RFC 6554.
> It seems exaggerated to consume a dispatch type for the RPL option only. 
> But here, we introduce a routing header which is the equivalent of the mesh header in RFC 4944; we propose a compressed TLV format that can encode RH3, RPL option, IP-in-IP, and is further extensible, for instance for upcoming  BIER.
> As it goes, the mesh header consumes 1/3 of all the 6LoWPAN addressable space for application only in Mesh-under. 
> This draft reuses that space in Route-over with the assumption that Route-over will not co-exist in a sma enetwork with Mesh-under encoded in the RFC 4944 fashion.
> If there is effectively a need for co-existence, devices have to implement the new Mesh-under format that is also proposed in the draft.
> 
> Comments welcome,
> Pascal
> 
> 
> -----Original Message-----
> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
> Sent: jeudi 27 novembre 2014 14:36
> To: Pascal Thubert (pthubert); Pascal Thubert (pthubert); Laurent Toutain; Carsten Bormann; Laurent Toutain; Dr. Carsten Bormann
> Subject: New Version Notification for draft-thubert-6lo-routing-dispatch-00.txt
> 
> 
> A new version of I-D, draft-thubert-6lo-routing-dispatch-00.txt
> has been successfully submitted by Pascal Thubert and posted to the IETF repository.
> 
> Name:        draft-thubert-6lo-routing-dispatch
> Revision:    00
> Title:        A Routing Header Dispatch for 6LoWPAN
> Document date:    2014-11-25
> Group:        Individual Submission
> Pages:        19
> URL:            http://www.ietf.org/internet-drafts/draft-thubert-6lo-routing-dispatch-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-thubert-6lo-routing-dispatch/
> Htmlized:       http://tools.ietf.org/html/draft-thubert-6lo-routing-dispatch-00
> 
> 
> Abstract:
>   This specification provides a new 6LoWPAN dispatch type for use in
>   Route-over and mixed Mesh-under and Route-over topologies, that
>   reuses the encoding of the mesh type defined in RFC 4944 for pure
>   Mesh-under topologies.  This specification also defines a method to
>   compress RPL Option (RFC6553) information and Routing Header type 3
>   (RFC6554), an efficient IP-in-IP technique and opens the way for
>   further routing techniques.  This extends 6LoWPAN Transmission of
>   IPv6 Packets (RFC4944), and is applicable to new link-layer types
>   where 6LoWPAN is being defined.
> 
> 
> 
> 
> 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
>