Re: [manet] AD Review of draft-ietf-manet-dlep-latency-extension-04

Lou Berger <lberger@labn.net> Fri, 21 June 2019 20:18 UTC

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To: Alvaro Retana <aretana.ietf@gmail.com>, draft-ietf-manet-dlep-latency-extension@ietf.org
Cc: manet@ietf.org, manet-chairs@ietf.org
References: <CAMMESszws1-EVqvq68FuqS2ovaq=TkrHZh5X4d8fiog+Dxj3Fw@mail.gmail.com>
From: Lou Berger <lberger@labn.net>
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Date: Fri, 21 Jun 2019 16:18:03 -0400
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Subject: Re: [manet] AD Review of draft-ietf-manet-dlep-latency-extension-04
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Alvaro,

     good catch and will do.

Lou

On 6/21/2019 4:07 PM, Alvaro Retana wrote:
> Dear authors:
>
> I just finished reading this document. Sorry for the processing delay.
>
> I have only one issue.  I'm starting the IETF Last Call because I 
> believe we can take care of it with other LC comments.
>
> From §3: "The Latency Range Data Item MAY be carried in any message 
> where the Latency Data Item [RFC8175] is allowed and is carried as an 
> additional data item."
>
> There is an exception to the "MAY be carried" part above; rfc8175 
> §12.6 (Session Initialization Response Message) says:
>
>    All supported metric Data Items MUST be included in the Session
>    Initialization Response Message, with default values to be used on a
>    session-wide basis.  This can be viewed as the modem "declaring" all
>    supported metrics at DLEP session initialization.  Receipt of any
>    further DLEP Message containing a metric Data Item not included in
>    the Session Initialization Response Message MUST be treated as an
>    error, resulting in the termination of the DLEP session between
>    router and modem.
>
>    If any optional extensions are supported by the modem, they MUST be
>    enumerated in the Extensions Supported Data Item.  If an Extensions
>    Supported Data Item does not exist in a Session Initialization
>    Response Message, the router MUST conclude that there is no support
>    for extensions in the modem.
>
>
> IOW, the Latency Range MUST be carried in the Session Initialization 
> Response Message.  Please add text to that effect.
>
> Thanks!
>
> Alvaro.
>
>
>
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