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Re: [tcpm] Open questions in draft-scharf-tcpm-yang-tcp-03

Joe Touch <touch@strayalpha.com> Fri, 29 November 2019 17:08 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Fri, 29 Nov 2019 09:08:37 -0800
Cc: tcpm IETF list <tcpm@ietf.org>, "draft-scharf-tcpm-yang-tcp@ietf.org" <draft-scharf-tcpm-yang-tcp@ietf.org>
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To: "Scharf, Michael" <Michael.Scharf@hs-esslingen.de>
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Subject: Re: [tcpm] Open questions in draft-scharf-tcpm-yang-tcp-03
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Hi, Michael,

> On Nov 28, 2019, at 10:37 AM, Scharf, Michael <Michael.Scharf@hs-esslingen.de> wrote:
> 
> [chair hat off]
> 
> At IETF 106 there was not enough time left for Mahesh to present the latest update of the document "YANG Model for Transmission Control Protocol (TCP) Configuration".
> 
> Mahesh, Vishal and me have significantly updated draft-scharf-tcpm-yang-tcp-03 since the last meeting. The changes are summarized in the slides that can be found at:
> 
>   https://datatracker.ietf.org/meeting/106/materials/slides-106-tcpm-yang-model-for-transmission-control-protocol-tcp-configuration-01
> 
> Our proposal to refine the scope of the document. This results in at least 4 questions:
> 
> 1. Should the model support statistics?

IMO, no - that should be a different, optional model (TCP-stats or something).

> 2. Should it model all TCP connections?

I don’t know what that means, even given the slides. I would expect there to be some common practice for this in YANG models, i.e., to describe how state is grouped by address.

> 3. Add support for TCP-AO?

It should include all current standards-track options IMO.

> 4. Add support for TCP-MD5?

For the reason above, this should not be included - it is deprecated by TCP-AO. If supported, it should be clearly identified as deprecated.

Joe

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