Re: [tcpm] I-D Action: draft-nishida-tcpm-agg-syn-ext-01.txt

Hi Carles,
Thanks for the feedback.
Yes, that's the point I have been wondering about.
I agree with your assessments. Do you have any thoughts on the best
choice among them?
--
Yoshi

On Mon, Nov 7, 2022 at 2:06 AM Carles Gomez Montenegro <carles.gomez@upc.edu>
wrote:

> Hi Yoshi,
>
> Thanks for your draft, and for taking into account the needs of a new
> experimental proposal such as the TARR option.
>
> Indeed, currently, 4 bytes is the minimum format size to announce
> support of an RFC 6994-conforming experimental TCP option. However, as
> you mention in your draft, the same information might be conveyed by
> using less bits.
>
> I've been thinking about whether the number of GID bits (i.e., 2 bits)
> is the best choice or not. My own conclusion is that it is, since:
>
> - Number of GID bits = 0 --> it does not allow to omit unused aggregated
> blocks.
> - Number of GID bits = 1 --> it would support only 14 options.
> - Number of GID bits = 3 --> it would support 40 options, which
> perhaps is not really necessary, and would add one bit of overhead per
> aggregated block.
>
> Thanks,
>
> Carles
>
>
>
>
>
> > Hi folks,
> >
> > I have submitted an updated version for aggregated option draft.
> > The main points of this version are the following, mainly to address
> Joe's comments.
> > - The draft contains now aggregated option only.  delay negotiation
> proposal has been removed and out of scope of the draft.
> > - The main target for aggregated option is a new experimental proposal
> such as TARR option while It is possible to aggregate existing options with
> some conditions,
> > It would be great if you could provide some feedback.
> >
> > Thanks,
> > --
> > Yoshi
> >
> >
> > On Sun, Oct 23, 2022 at 12:15 AM <internet-drafts@ietf.org> wrote:
> >>
> >>
> >> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >>
> >>
> >>         Title           : Aggregated Option for SYN Option Space
> Extension
> >>         Author          : Yoshifumi Nishida
> >>   Filename        : draft-nishida-tcpm-agg-syn-ext-01.txt
> >>   Pages           : 9
> >>   Date            : 2022-10-23
> >>
> >> Abstract:
> >>    TCP option space is scarce resource as its max length is limited to
> >>    40 bytes.  This limitation becomes more significant in SYN segments
> >>    as all options used in a connection should be exchanged during SYN
> >>    negotiations.  This document proposes a new SYN option negotiation
> >>    scheme that can aggregate multiple TCP options in SYN segments into a
> >>    single option so that more options can be negotiate during 3 way
> >>    handshake.  With its simple design, the approach does not require
> >>    fundamental changes in TCP.
> >>
> >>
> >> The IETF datatracker status page for this draft is:
> >> https://datatracker.ietf.org/doc/draft-nishida-tcpm-agg-syn-ext/
> >>
> >> There is also an HTML version available at:
> >> https://www.ietf.org/archive/id/draft-nishida-tcpm-agg-syn-ext-01.html
> >>
> >> A diff from the previous version is available at:
> >> https://www.ietf.org/rfcdiff?url2=draft-nishida-tcpm-agg-syn-ext-01
> >>
> >>
> >> Internet-Drafts are also available by rsync at rsync.ietf.org:
> :internet-drafts
> >>
> >>
> >> _______________________________________________
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> >> Internet-Draft directories: http://www.ietf.org/shadow.html
> >> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >
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