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Re: [tcpm] IETF 114 TCPM WG - NG TCPM Yang Model

Gyan Mishra <hayabusagsm@gmail.com> Wed, 27 July 2022 04:22 UTC

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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Wed, 27 Jul 2022 00:22:06 -0400
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To: "touch@strayalpha.com" <touch@strayalpha.com>
Cc: Jeffrey Haas <jhaas@pfrc.org>, Michael Tuexen <michael.tuexen@lurchi.franken.de>, Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>, "Van De Velde, Gunter (Nokia - BE/Antwerp)" <gunter.van_de_velde@nokia.com>, tcpm IETF list <tcpm@ietf.org>
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Subject: Re: [tcpm] IETF 114 TCPM WG - NG TCPM Yang Model
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Hi Joe

This is good conversation for Friday.

Thanks

Gyan

On Tue, Jul 26, 2022 at 10:13 PM touch@strayalpha.com <touch@strayalpha.com>
wrote:

> Notes below.
>
> > On Jul 26, 2022, at 6:19 PM, Michael Tuexen <
> michael.tuexen@lurchi.franken.de> wrote:
> >
> >>
> >>
> >> Dear TCPM
> >>
> >> Attached is the slide deck for the NG TCP Yang model discussion.
> >>
> >> Sue, Robert, Jeff, Gunter
> >>
> >> Please review and let me know if I missed any talking points for the NG
> TCP Yang model.
> > A couple of clarifying questions related to slide "What to add to NG TCP
> Yang Model?",
> > especially since I know almost nothing about YANG:
> >
> > • All TCP states part of the FSM state machine.
> > Understood.
>
> These make sense.
>
> > • All TCP flags and respective states.
> > Do you mean the TCP flags SYN, FIN, PSH, ... Does a YANG module all to
> describe
> > packets sent and received?
>
> I can’t see how this can model the TCP flags; all it should be modeling is
> the states of the connection. The model is for TCP, not TCP packets.
>
> > • All TCP parameters that would be accessible with a local OS kernel
> hook.
> > Doesn't that mean the complete set of state variable the kernel has and
> isn't that implementation dependent?
> > • All windowing parameters including window scaling as well as any
> windowing related optimizations.
> > You mean the receiver window including the window scaling.
> > • All TCP options and optimizations set such as Selective ACK.
> > I guess you mean the set of TCP extensions which have been negotiated.
> > • All TCP slow start congestion control parameters CWIN etc.
> > There are a multiple Congestion Controls, even ones not being specified
> by the IETF.
> > So this might get very hard to do. Or do you require a specific CC when
> using TCP for BGP?
>
> This is where things get confusing to me; it seems that there is either a
> model for TCP or a model for TCP implementations. The two should not be
> confused with each other
>
> Joe
>
> >
> > Best regards
> > Michael
> >>
> >> Thanks
> >>
> >> Gyan
> >>
> >> ---------- Forwarded message ---------
> >> From: Mishra, Gyan S <gyan.s.mishra@verizon.com>
> >> Date: Mon, Jul 25, 2022 at 11:36 PM
> >> Subject: IETF 114 TCPM WG - NG TCPM Yang Model
> >> To: Hayabusanew <hayabusagsm@gmail.com>
> >>
> >>
> >> --
> >>
> >>
> >> Gyan Mishra
> >> Network Solutions Architect
> >> Email gyan.s.mishra@verizon.com
> >> M 301 502-1347
> >>
> >>
> >> <IETF-114 TCPM TCP Yang
> Model.pdf>_______________________________________________
> >> tcpm mailing list
> >> tcpm@ietf.org
> >> https://www.ietf.org/mailman/listinfo/tcpm
> >
> > _______________________________________________
> > tcpm mailing list
> > tcpm@ietf.org
> > https://www.ietf.org/mailman/listinfo/tcpm
>
> --

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*Gyan Mishra*

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*Email gyan.s.mishra@verizon.com <gyan.s.mishra@verizon.com>*



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