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Re: [tcpm] [Last-Call] Opsdir telechat review of draft-ietf-tcpm-yang-tcp-07

"touch@strayalpha.com" <touch@strayalpha.com> Mon, 04 July 2022 19:30 UTC

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From: "touch@strayalpha.com" <touch@strayalpha.com>
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Date: Mon, 04 Jul 2022 12:29:57 -0700
Cc: "Scharf, Michael" <Michael.Scharf@hs-esslingen.de>, Gyan Mishra <hayabusagsm@gmail.com>, Last Call <last-call@ietf.org>, "draft-ietf-tcpm-yang-tcp.all@ietf.org" <draft-ietf-tcpm-yang-tcp.all@ietf.org>, "ops-dir@ietf.org" <ops-dir@ietf.org>, "tcpm@ietf.org" <tcpm@ietf.org>
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To: Robert Raszuk <robert@raszuk.net>
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Subject: Re: [tcpm] [Last-Call] Opsdir telechat review of draft-ietf-tcpm-yang-tcp-07
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> On Jul 4, 2022, at 12:15 PM, Robert Raszuk <robert@raszuk.net> wrote:
> 
> Hi,
> 
> > Any application can decide to configure TCP parameters as far as possible in the given operation 
> > system, e.g., via the sockets API. That is orthogonal to the internals of the TCP implementation and the TCP protocol.
> 
> While clients running on top of TCP can configure its parameters I would at least expect to be able to report such values (local and remote) when using the TCP YANG model. For example I can not find the Urgent Flag in the current YANG model.

That’s because URG is not a property of the TCP connection; it’s a property of a segment, not the connection. The same is true for PSH.

> Same for elementary window size of any given connection, same for connection duration, . 

There is no such thing as “elementary window size”. There are a variety of window parameters, i.e., send window, congestion window, receive window. Only the send and receive windows are application / OS set. 

If there’s a list of desired parameters, it would be useful to start by stating them in terms of the TCP specs and explaining why they need to be remotely managed. 

Joe

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