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

[Gyan Mishra <[e-mail]>]

Hi Joe

Responses in-line

On Tue, Jul 26, 2022 at 10:13 PM [e-mail] <[e-mail]>
wrote:

> Notes below.
>
> > On Jul 26, 2022, at 6:19 PM, Michael Tuexen <
> [e-mail]> 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.


    Gyan> Agreed that we want to model the TCP states not the 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


    Gyan> Yes I think specific CC-Congestion Control when using TCP for
BGP.  As there are many implementations variations I think we want a model
for TCP that covers most all implementations

>
>
> Joe
>
> >
> > Best regards
> > Michael
> >>
> >> Thanks
> >>
> >> Gyan
> >>
> >> ---------- Forwarded message ---------
> >> From: Mishra, Gyan S <[e-mail]>
> >> Date: Mon, Jul 25, 2022 at 11:36 PM
> >> Subject: IETF 114 TCPM WG - NG TCPM Yang Model
> >> To: Hayabusanew <[e-mail]>
> >>
> >>
> >> --
> >>
> >>
> >> Gyan Mishra
> >> Network Solutions Architect
> >> Email [e-mail]
> >> M 301 502-1347
> >>
> >>
> >> <IETF-114 TCPM TCP Yang
> Model.pdf>_______________________________________________
> >> tcpm mailing list
> >> [e-mail]
> >> https://www.ietf.org/mailman/listinfo/tcpm
> >
> > _______________________________________________
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>
> --

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *

*Email [e-mail] <[e-mail]>*



*M 301 502-1347*