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Re: [Detnet] Genart last call review of draft-ietf-detnet-data-plane-framework-04

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 16 April 2020 16:46 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Balázs Varga A <balazs.a.varga@ericsson.com>, "gen-art@ietf.org" <gen-art@ietf.org>
CC: "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-detnet-data-plane-framework.all@ietf.org" <draft-ietf-detnet-data-plane-framework.all@ietf.org>, "detnet@ietf.org" <detnet@ietf.org>
Thread-Topic: Genart last call review of draft-ietf-detnet-data-plane-framework-04
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Date: Thu, 16 Apr 2020 16:46:47 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/detnet/_jvcJXBwg7TFdUTrGtSNgpiyamE>
Subject: Re: [Detnet] Genart last call review of draft-ietf-detnet-data-plane-framework-04
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Hi Bala'zs,

The modified text you suggest addresses my issue.

Thanks!

Regards,

Christer
 

On 16/04/2020, 14.28, "Balázs Varga A" <balazs.a.varga@ericsson.com> wrote:

    Hi Christer,
    
    No, data plane specification does not cover what protocols are used by service sub-layer and forwarding sub-layer functions.
    A data plane specification specifies what headers fields are there in the packet and how to use these header fields for a specific 
    purpose. For instance, in case of DetNet, what fields are used to recognize a DetNet flow (flow ID) and how is the sequence number 
    encoded and used.
    
    A possible clarification is below (text added in brackets to firs sentence). Does it solves your concern?
    OLD:
       This document describes the concepts needed by any DetNet data plane
       specification and provides considerations for any corresponding
       implementation.  It covers the building blocks that provide the
       DetNet service, the DetNet service sub-layer and the DetNet
       forwarding sub-layer functions as described in the DetNet
       Architecture.
    
    NEW:
       This document describes the concepts needed by any DetNet data plane
       specification (i.e., the DetNet-specific use of packet header fields) and 
       provides considerations for any corresponding
       implementation.  It covers the building blocks that provide the
       DetNet service, the DetNet service sub-layer and the DetNet
       forwarding sub-layer functions as described in the DetNet
       Architecture.
    
    Thanks
    Bala'zs
    
    -----Original Message-----
    From: Christer Holmberg <christer.holmberg@ericsson.com> 
    Sent: Wednesday, April 15, 2020 11:19 PM
    To: Balázs Varga A <balazs.a.varga@ericsson.com>; gen-art@ietf.org
    Cc: last-call@ietf.org; draft-ietf-detnet-data-plane-framework.all@ietf.org; detnet@ietf.org
    Subject: Re: Genart last call review of draft-ietf-detnet-data-plane-framework-04
    
    Hi Bala'zs,
    
    Thank you for the reply and clarifications. I still have a question on Q2.
    
    ...
        
        Q2:
        
        >> The first line of the 2nd paragraph of the Introduction says:
        >>
        >> “This document describes the concepts needed by any DetNet data plane specification…”
        >>
        >> What is meant by DetNet data plane specification? The definition of DetNet flows over a specific network technology? Please clarify, or reference if already defined elsewhere.
        >
        > <BV> Data plane documents focuses how DetNet packets are recognized and served according to DetNet service and forwarding sub-layer functions. 
        >The next sentence is intended to clarify that.
    
        The next sentence is fine. It is just a little unclear to me what the definition of DetNet data plane specification actually is. Is it a specification that 
        defines the combination of service sub-layer using protocol X and forwarding sub-layer using protocol Y?
    
    
    Regards,
    
    Christer

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