Dear Brian,
after the WG meeting we proceed to resolve your pointed issue. Thanks so
much for going through the draft again.
We will publish v11 with the following update on the text as you suggested.
We hope this clarifies your point.
In section 3.1.1. 2-step 6P Transaction
we added:
Race conditions MAY happen when a timeout expires while a 6P
Response is on the air. Other inconsistencies can also happen
when the last L2 ACK for a 6P Response is lost or when one of the
nodes is power cycled. 6P provides an inconsistency detection
mechanism described in Section 3.4.6.1 to cope with such
situations.
In section 3.1.2. 3-step 6P Transaction
we added:
Race conditions MAY happen when a timeout expires while a 6P
Confirmation is on the air. Other inconsistencies can also
happen when the last L2 ACK for a 6P Confirmation is lost or when
one of the nodes is power cycled. 6P provides an inconsistency
detection mechanism described in Section 3.4.6.1 to cope with
such situations.
kind regards
Xavi
2018-03-11 4:11 GMT+01:00 Brian Carpenter <[email protected]>:
> Reviewer: Brian Carpenter
> Review result: Ready
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair. Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
>
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-6tisch-6top-protocol-10
> Reviewer: Brian Carpenter
> Review Date: 2018-03-10
> IETF LC End Date: 2018-03-26
> IESG Telechat date: 2018-04-05
>
> Summary: Ready
>
> Comment:
>
> Most of my previous comments have been fixed, thanks. I still disagree
> with the authors on one point, but not enough to delay the draft:
>
> In section 3.1.1 "2-step 6P Transaction" there seems to be a rare race
> condition
> if A's timeout expires while B's Response is in flight. This will be
> detected
> later as an inconsistency (section 3.4.6.2). The authors don't think it's
> necessary
> to mention this in 3.1.1. IMHO it would be useful to mention. (Similarly
> for
> section 3.1.2, 3-step transaction.)
>
>
>
--
Dr. Xavier Vilajosana
Wireless Networks Lab
*Internet Interdisciplinary Institute (IN3)Professor*
(+34) 646 633 681
[email protected] <[email protected]>
http://xvilajosana.org
http://wine.rdi.uoc.edu
Parc Mediterrani de la Tecnologia
Av Carl Friedrich Gauss 5, B3 Building
08860 Castelldefels (Barcelona). Catalonia. Spain
[image: Universitat Oberta de Catalunya]
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