Hi Fabio, thanks for the clarification. I think that I finally got it:
0x7E to 0x7F is for just experimentation. 0xFE to 0xFF is for shim headers experimentation My confusion came from the fact that is not clearly stated. Can we modify the text as: 0x7E to 0x7F: Experimentation and testing 0x80 to 0xFD: Unassigned (shim headers) 0xFE to 0xFF: Experimentation and testing (shim headers) So that the difference is clearly stated. Ciao L. > On 2 Jun 2020, at 19:34, Fabio Maino (fmaino) <[email protected]> wrote: > > Ciso Luigi, please see below... > > On 6/2/20, 12:11 AM, "Luigi Iannone" <[email protected] > <mailto:[email protected]>> wrote: > > > >> On 1 Jun 2020, at 07:53, Fabio Maino (fmaino) <[email protected]> wrote: >> >> Ciao Luigi, >> The reason is to allow to experiment with shim headers and non-shim headers >> at the same time. As you may remember shim headers have a more fixed encodng >> and must be located before non-shim headers. > > That is OK for me. > > But my question is why this: > >> 0x7E to 0x7F: Experimentation and testing > > FM> The two above are for experimentation of NON shim headers > >> 0x80 to 0xFD: Unassigned (shim headers) >> 0xFE to 0xFF: Experimentation and testing > >> FM These two are for experimentation of shim headers. > > Shim headers are placed (and processed) first, so we want to give the freedom > to experiment with both. > > For example, one would want to experiment with a shim header (identified by > 0xFE) that carries some special metadata for IPv4 payloads, while someone > else would want to experiment with IPv8 payloads (identified with 0x7E). A > third person might want to experiment, at the same time, with a shim header > that carries special metadata for IPv8. > > Fabio > > > > > > > Instead of this (range has been adapted): > > 0x7E to 0xFB: Unassigned (shim headers) > 0xFC to 0xFF: Experimentation and testing > > ?? > > Certainly I am missing something ;-) > > Ciao > > L. > > > >> >> Thanks, >> Fabio >> >> >> >> On 5/31/20, 10:47 PM, "Luigi Iannone" <[email protected]> wrote: >> >> Thank you for updating the document. >> >> I have a quick question. >> >> Looking at the next protocol values we now see: >> >> 0x7E to 0x7F: Experimentation and testing >> 0x80 to 0xFD: Unassigned (shim headers) >> 0xFE to 0xFF: Experimentation and testing >> >> Can you provide a rationale why not having just one bigger experimentation >> and testing range instead of two with an unassigned range in the middle? >> >> Thanks >> >> Ciao >> >> L. >> >> >> >>> On 1 Jun 2020, at 07:41, [email protected] wrote: >>> >>> >>> A New Internet-Draft is available from the on-line Internet-Drafts >>> directories. >>> This draft is a work item of the Locator/ID Separation Protocol WG of the >>> IETF. >>> >>> Title : LISP Generic Protocol Extension >>> Authors : Fabio Maino >>> Jennifer Lemon >>> Puneet Agarwal >>> Darrel Lewis >>> Michael Smith >>> Filename : draft-ietf-lisp-gpe-15.txt >>> Pages : 15 >>> Date : 2020-05-31 >>> >>> Abstract: >>> This document describes extentions to the Locator/ID Separation >>> Protocol (LISP) Data-Plane, via changes to the LISP header, to >>> support multi-protocol encapsulation. >>> >>> >>> The IETF datatracker status page for this draft is: >>> https://datatracker.ietf.org/doc/draft-ietf-lisp-gpe/ >>> >>> There are also htmlized versions available at: >>> https://tools.ietf.org/html/draft-ietf-lisp-gpe-15 >>> https://datatracker.ietf.org/doc/html/draft-ietf-lisp-gpe-15 >>> >>> A diff from the previous version is available at: >>> https://www.ietf.org/rfcdiff?url2=draft-ietf-lisp-gpe-15 >>> >>> >>> 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. >>> >>> Internet-Drafts are also available by anonymous FTP at: >>> ftp://ftp.ietf.org/internet-drafts/ >>> >>> >>> _______________________________________________ >>> lisp mailing list >>> [email protected] >>> https://www.ietf.org/mailman/listinfo/lisp
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