Re: [manet] Suresh Krishnan's Discuss on draft-ietf-manet-dlep-lid-extension-05: (with DISCUSS)

Stan,

I think you mean -06 version ☺

Cheers,

Rick Taylor
Product Design Authority, Mobile IP Node
Principal Engineer (eXpert), Mobile Communications
Airbus Defence and Space
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Newport
NP10 8FZ

Phone: +44 (0) 1633 71 5637
rick.taylor@airbus.com<mailto:rick.taylor@airbus.com>

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From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Stan Ratliff
Sent: 10 September 2019 16:10
To: Rick Taylor
Cc: draft-ietf-manet-dlep-lid-extension@ietf.org; manet-chairs@ietf.org; manet@ietf.org; suresh@kaloom.com; iesg@ietf.org
Subject: Re: [manet] Suresh Krishnan's Discuss on draft-ietf-manet-dlep-lid-extension-05: (with DISCUSS)

Suresh,

Thanks again for the review and comment. We have just submitted an 07 version of DLEP LID to resolve the items brought up during the last call. We used the text you suggested in Section 3.1 to resolve the issue. That section now reads:
"   The Link Identifier Length Data Item is used by a DLEP modem
   implementation to specify the length of Link Identifier Data Items.
   If the router advertised support by including the value 'Link
   Identifiers' in the Extension Data Item inside the Session
   Initialization Message, this data item MAY be used in the Session
   Initialization Response Message, if the specified length is not the
   default value of 4 octets.  If the router did not specify support by
   including the value 'Link Identifiers' in the Extension Data item,
   this Data Item MUST NOT be sent."

Regards,
Stan

On Wed, Aug 21, 2019 at 8:58 AM Rick Taylor <rick@tropicalstormsoftware.com<mailto:rick@tropicalstormsoftware.com>> wrote:
Hi Suresh,

Thanks for the feedback.

This is a difficult one, as the whole document refers to an extension,
we include canonical text early on that (tries to) state that if you
support this extension, this is what you should do, if not don't.

However, you are right that in the message that includes the extension
negotiation and possibly this message, your suggestion is good.

Cheers,

Rick

On Tue, 2019-08-20 at 21:05 -0700, Suresh Krishnan via Datatracker
wrote:
> Suresh Krishnan has entered the following ballot position for
> draft-ietf-manet-dlep-lid-extension-05: Discuss
>
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>
>
> Please refer to
> https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-manet-dlep-lid-extension/
>
>
>
> -------------------------------------------------------------------
> ---
> DISCUSS:
> -------------------------------------------------------------------
> ---
>
> * Section 3.1.
>
> I might be missing something here but I think that the "MUST be used"
> in this
> session is wrong and must be relaxed by qualifying it. Here is why.
> In case the
> router does not advertise support by including the value 'Link
> Identifiers' in
> the Extension Data Item inside the Session Initialization Message, I
> feel that
> the modem MUST NOT send the Link Identifier Length Data Item as this
> will
> result in a Session Termination message from the router based on the
> rules
> specified in Section 12.1 of RFC8175 due to the unknown data item.
>
> If you agree with my assessment, I would suggest a change like this.
> If not,
> can you please clarify.
>
> OLD:
>
>    It MUST be used during Session Initialization, contained in a
> Session
>    Initialization Response Message, if the specified length is not
> the
>    default value of 4 octets.
>
> NEW:
>
>    If the router advertised support by including the value 'Link
> Identifiers'
>    in the Extension Data Item inside the Session Initialization
> Message, this
>    data item MUST be used during Session Initialization, contained in
> a Session
>    Initialization Response Message, if the specified length is not
> the default
>    value of 4 octets. If not, this Data Item MUST NOT be sent.
>
>
>
>
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