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From: <dominique.barthel@orange.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] MOPex updates and extended control option query
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Date: Mon, 1 Nov 2021 08:31:59 +0000
Message-ID: <10614_1635755520_617FA600_10614_38_1_36d17c17400c4bf3bad2b8edc9174cff@orange.com>
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Subject: Re: [Roll] MOPex updates and extended control option query
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From: Rahul Jadhav <rahul.ietf@gmail.com>
Date: Mon, 1 Nov 2021 19:21:46 +0530
Message-ID: <CAO0Djp173KZ43M+_GjPhCtB_FYXH4h9x+_76bJXHPrZzgPKA+g@mail.gmail.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/BioUuEBUqCAtIj7es8R9APKV6Rk>
Subject: Re: [Roll] MOPex updates and extended control option query
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On Mon, 1 Nov 2021 at 14:02, <dominique.barthel@orange.com> wrote:

> Hello Rahul,
>
>
>
> I=E2=80=99m digging up open items regarding our active documents., sorry =
if this
> comes up very late.
>
> I=E2=80=99m curious about your proposal for an option =E2=80=9Cfor the no=
de to not join
> the network at all (not even as 6LN) if a control option is not understoo=
d=E2=80=9D.
>
> Do you have a use case for it that you could share?
>

I do not have a use-case for this. Michael also pointed out this on the
repo <https://github.com/roll-wg/mopex/issues/8#issuecomment-811380561>if
this is necessary. I think this point was raised during one of the interims
(but I do not know exactly who raised this point).

Thank you for bringing this up.



> I fail to see in which circumstance the node should not be allowed to joi=
n
> as a leaf node?
>
> Thanks
>
>
>
> Dominique
>
>
>
>
>
> *From:* Roll [mailto:roll-bounces@ietf.org] *On Behalf Of *Rahul Jadhav
> *Sent:* mercredi 31 mars 2021 16:25
> *To:* Routing Over Low power and Lossy networks <roll@ietf.org>
> *Subject:* [Roll] MOPex updates and extended control option query
>
>
>
> Hello All,
>
>
>
> The MOPex draft is refreshed with just editorial changes in this version.
>
>
>
> However, I would like to raise one point that Pascal made during the IETF
> 110 session.
>
>
>
> Currently, the MOPex draft extends the RPL control options with certain
> flags to handle cases where the control option is not understood by the
> node:
>
> J-flag: Join only as 6LN
>
> C-flag: copy option as-is even if not understood
>
> I-flag: Ignore message altogether.
>
>
>
> We could have an option for the node to not join the network at all (not
> even as 6LN) if a control option is not understood.
>
> Any feedback on this would be appreciated.
>
>
>
> Thanks,
>
> Rahul
>
>
>
> ---------- Forwarded message ---------
> From: <internet-drafts@ietf.org>
> Date: Wed, 31 Mar 2021 at 19:43
> Subject: New Version Notification for draft-ietf-roll-mopex-03.txt
> To: Michael Richardson <mcr+ietf@sandelman.ca>, Pascal Thubert <
> pthubert@cisco.com>, Rahul Arvind Jadhav <rahul.ietf@gmail.com>
>
>
>
>
> A new version of I-D, draft-ietf-roll-mopex-03.txt
> has been successfully submitted by Rahul Arvind Jadhav and posted to the
> IETF repository.
>
> Name:           draft-ietf-roll-mopex
> Revision:       03
> Title:          Mode of Operation extension
> Document date:  2021-03-31
> Group:          roll
> Pages:          9
> URL:
> https://www.ietf.org/archive/id/draft-ietf-roll-mopex-03.txt
> Status:         https://datatracker.ietf.org/doc/draft-ietf-roll-mopex/
> Htmlized:
> https://datatracker.ietf.org/doc/html/draft-ietf-roll-mopex
> Htmlized:       https://tools.ietf.org/html/draft-ietf-roll-mopex-03
> Diff:           https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-roll-mopex=
-03
>
> Abstract:
>    RPL allows different mode of operations which allows nodes to have a
>    consensus on the basic primitives that must be supported to join the
>    network.  The MOP field in [RFC6550] is of 3 bits and is fast
>    depleting.  This document extends the MOP for future use.
>
>
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> The IETF Secretariat
>
> _________________________________________________________________________=
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--0000000000001d2ef705cfba7b48
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:verdana,sans-serif;color:#20124d"><br></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, 1 Nov 2021 a=
t 14:02, &lt;<a href=3D"mailto:dominique.barthel@orange.com">dominique.bart=
hel@orange.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">





<div lang=3D"FR">
<div class=3D"gmail-m_6797381648508763298WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Hello Rahul,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">I=E2=80=99m digging up open i=
tems regarding our active documents., sorry if this comes up very late.<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">I=E2=80=99m curious about you=
r proposal for an option =E2=80=9Cfor the node to not join the network at a=
ll (not even as 6LN) if a control
 option is not understood=E2=80=9D.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Do you have a use case for it=
 that you could share?</span></p></div></div></blockquote><div><br></div><d=
iv><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;col=
or:rgb(32,18,77)">I do not have a use-case for this. Michael also pointed o=
ut <a href=3D"https://github.com/roll-wg/mopex/issues/8#issuecomment-811380=
561">this on the repo </a>if this is necessary. I think this point was rais=
ed during one of the interims (but I do not know exactly who raised this po=
int).</div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-s=
erif;color:rgb(32,18,77)"><br></div><div class=3D"gmail_default" style=3D"f=
ont-family:verdana,sans-serif;color:rgb(32,18,77)">Thank you for bringing t=
his up.</div><br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div lang=3D"FR"><div class=3D"gmail-m_6797381648508763298Wo=
rdSection1"><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:=
11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">I fail to see in which circum=
stance the node should not be allowed to join as a leaf node?<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Thanks<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Dominique<u></u><u></u></span=
></p>
<p class=3D"MsoNormal" style=3D"line-height:15pt"><span style=3D"color:rgb(=
31,73,125)">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11pt;font=
-family:Calibri,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"f=
ont-size:11pt;font-family:Calibri,sans-serif"> Roll [mailto:<a href=3D"mail=
to:roll-bounces@ietf.org" target=3D"_blank">roll-bounces@ietf.org</a>]
<b>On Behalf Of </b>Rahul Jadhav<br>
<b>Sent:</b> mercredi 31 mars 2021 16:25<br>
<b>To:</b> Routing Over Low power and Lossy networks &lt;<a href=3D"mailto:=
roll@ietf.org" target=3D"_blank">roll@ietf.org</a>&gt;<br>
<b>Subject:</b> [Roll] MOPex updates and extended control option query<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">Hello All,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">The MOPex draft is refreshed=C2=A0with just editorial change=
s in this version.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">However, I would like to raise one point that Pascal made du=
ring the IETF 110 session.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">Currently, the MOPex draft extends the RPL control=C2=A0opti=
ons with certain flags to handle cases where the control option is not unde=
rstood by the node:<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">J-flag: Join only as 6LN<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">C-flag: copy option as-is even if not understood<u></u><u></=
u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">I-flag: Ignore message altogether.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">We could have an option for the node to not join the network=
 at all (not even as 6LN) if a control option is not understood.<u></u><u><=
/u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">Any feedback on this would be appreciated.<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">Thanks,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Verdana,sans-serif;color:=
rgb(32,18,77)">Rahul<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">---------- Forwarded message ---------<br>
From: &lt;<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">int=
ernet-drafts@ietf.org</a>&gt;<br>
Date: Wed, 31 Mar 2021 at 19:43<br>
Subject: New Version Notification for draft-ietf-roll-mopex-03.txt<br>
To: Michael Richardson &lt;<a href=3D"mailto:mcr%2Bietf@sandelman.ca" targe=
t=3D"_blank">mcr+ietf@sandelman.ca</a>&gt;, Pascal Thubert &lt;<a href=3D"m=
ailto:pthubert@cisco.com" target=3D"_blank">pthubert@cisco.com</a>&gt;, Rah=
ul Arvind Jadhav &lt;<a href=3D"mailto:rahul.ietf@gmail.com" target=3D"_bla=
nk">rahul.ietf@gmail.com</a>&gt;<u></u><u></u></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
<br>
<br>
A new version of I-D, draft-ietf-roll-mopex-03.txt<br>
has been successfully submitted by Rahul Arvind Jadhav and posted to the<br=
>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-roll-mopex<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A003<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Mode of Operation extension<br>
Document date:=C2=A0 2021-03-31<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 roll<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 9<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/archive/id/draft-ietf-roll-mopex-03.txt" target=3D"_blank">
https://www.ietf.org/archive/id/draft-ietf-roll-mopex-03.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-ietf-roll-mopex/" target=3D"_blank">https://datatracker.iet=
f.org/doc/draft-ietf-roll-mopex/</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-ietf-roll-mopex" target=3D"_blank">https://datatracker.ietf=
.org/doc/html/draft-ietf-roll-mopex</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-ietf-roll-mopex-03" target=3D"_blank">https://tools.ietf.org/html/dra=
ft-ietf-roll-mopex-03</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-ietf-roll-mopex-03" target=3D"_blank">https://www.i=
etf.org/rfcdiff?url2=3Ddraft-ietf-roll-mopex-03</a><br>
<br>
Abstract:<br>
=C2=A0 =C2=A0RPL allows different mode of operations which allows nodes to =
have a<br>
=C2=A0 =C2=A0consensus on the basic primitives that must be supported to jo=
in the<br>
=C2=A0 =C2=A0network.=C2=A0 The MOP field in [RFC6550] is of 3 bits and is =
fast<br>
=C2=A0 =C2=A0depleting.=C2=A0 This document extends the MOP for future use.=
<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" target=3D"_blank">
tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
<u></u><u></u></p>
</div>
</div>
</div>
<pre>______________________________________________________________________=
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--000000000000c18f0d05d00fa739
Content-Type: text/plain; charset="UTF-8"
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Hello John,

Thank you for your comments to improve the document. We believe that v11
addresses your DISCUSS points, please let us know.

Please find comments below corresponding to version 11 in [v11]

----------------------------------------------------------------------

DISCUSS:

----------------------------------------------------------------------

A lot of effort has clearly gone into this work, thank you. I do have one
topic

I want to DISCUSS, as it seriously impacted the readability of the document

from my point of view. I don=E2=80=99t anticipate that it will be very diff=
icult to

resolve this DISCUSS as it relates to clarity and not to anything
fundamental.

My chief difficulty with the document is placing it in context. No hints ar=
e

given to the reader as to what the expected network environment is. I think
it

would be almost sufficient to say, for example =E2=80=9Cthe network environ=
ment is

assumed to be the same as described in RFC 6550, Section 1=E2=80=9D for exa=
mple, but

without that hint and without a strong background in ROLL, I found myself

struggling. Figures 4 and 5 in particular lead me to believe the expected

environment looks similar to a classic ISP network =E2=80=94 a collection o=
f nodes

connected by point-to-point links. If this isn=E2=80=99t correct (and I bet=
 it=E2=80=99s
not)

that may have led me into incorrect assumptions, which may be reflected in
my

other comments below.

[v11] Page 3, new text: The network environment that is considered in this

   document is assumed to be the same as described in Section 1 of
<https://datatracker.ietf.org/doc/html/rfc6550#section-1>

   [RFC6550] <https://datatracker.ietf.org/doc/html/rfc6550#section-1>.


Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended to s=
tand
alone

as its own routing protocol, or to be viewed as an extension of RPL. In the

former case, it seems the document is lacking details that are present in
RFC

6550. I=E2=80=99m assuming the latter is the case, but a clear statement to=
 that
effect

seems indicated.

[v11] Page 3, new text: AODV-RPL reuses and extends the core RPL
functionality to support

   routes with bidirectional asymmetric links



----------------------------------------------------------------------

COMMENT:

----------------------------------------------------------------------

1. Section 1:

   Reply.  AODV-RPL currently omits some features compared to AODV -- in

   particular, flagging Route Errors, blacklisting unidirectional links,

   multihoming, and handling unnumbered interfaces.

Your use of language is entirely up to you, but I feel obliged to point out

that there=E2=80=99s been a lot of discussion in the IETF community recentl=
y about
use

of language that raises sensitive points, and about the term =E2=80=9Cblack=
listing=E2=80=9D
in

particular. I understand that this is the only place in the document the
term

appears, and since it refers to AODV you can=E2=80=99t just use another ter=
m, but

placing it in quotation marks might make it clear that it=E2=80=99s referri=
ng
verbatim

to the language of RFC 3561.

[v11] (Page 3), new text:  AODV-RPL currently omits some features compared
to AODV -- in

   particular, flagging Route Errors, "blacklisting" unidirectional

   links ([RFC3561 <https://datatracker.ietf.org/doc/html/rfc3561>]),
multihoming, and handling unnumbered interfaces.


2. Section 1:

  support for storing and non-storing modes.  AODV adds basic messages

  RREQ and RREP as part of RPL DIO (DODAG Information Object) control

Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?


[v11] Page 3: It was changed to AODV-RPL adds basic messages


3. Section 2:

   Symmetric route

      The upstream and downstream routes traverse the same routers.

Same routers? Or same links? (Or both, if multi-access links are part of th=
e

mix, as I imagine they may be?)

[v11] Page 5, new text: Symmetric route: The upstream and downstream routes
traverse the same routers and

      over the same links.


4. Section 4.1:

   OrigNode sets its IPv6 address in the DODAGID field of the RREQ-DIO

   message.  A RREQ-DIO message MUST carry exactly one RREQ option,

Should that say =E2=80=9Cone of its IPv6 addresses"? Is it even necessary t=
o restate

this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:

   DODAGID: 128-bit IPv6 address set by a DODAG root that uniquely

         identifies a DODAG.  The DODAGID MUST be a routable IPv6

         address belonging to the DODAG root.

[v11] Page 6-New text: OrigNode selects one of its IPv6 addresses and sets
it in the DODAGID

   field of the RREQ-DIO message.


5. Section S4.1:

  TargNode can join the RREQ instance at a Rank whose integer portion

  is equal to the MaxRank.

Not less than or equal, right? Strict equality to MaxRank is required?

[v11] Page 8, new text: TargNode can join the RREQ instance at a Rank whose
integer portion

   is less than or equal to the MaxRank.


6. Section 4.2:

   TargNode sets its IPv6 address in the DODAGID field of the RREP-DIO

   message.  A RREP-DIO message MUST carry exactly one RREP option,

Same as #4.

[v11] Page 8, new text: TargNode sets one of its IPv6 addresses in the
DODAGID field of the

   RREP-DIO message.


7. Section 4.2:

  Address Vector

     Only present when the H bit is set to 0.  For an asymmetric route,

     the Address Vector represents the IPv6 addresses of the route that

     the RREP-DIO has passed.

The first time I read through this, I didn=E2=80=99t understand it at all. =
On

re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=9D i=
n two different ways in
the

same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the sense =
of an object in
the

protocol, the second time in the more casual sense of =E2=80=9Ca path throu=
gh the

network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the second i=
nstance, as in =E2=80=9C=E2=80=A6

represents the IPv6 addresses of the path through the network the RREP-DIO
has

Traversed.=E2=80=9D

[v11] Page 10, new text: Address Vector

      Only present when the H bit is set to 0.  For an asymmetric route,

      the Address Vector represents the IPv6 addresses of the path

      through the network the RREP-DIO has passed.

Passed was not changed to Traversed.


Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=E2=80=
=99t any

given node have various IPv6 addresses? So maybe just lose the definite

article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the path=E2=
=80=A6=E2=80=9D?

8. Section 4.3:

  r

     A one-bit reserved field.  This field MUST be initialized to zero

     by the sender and MUST be ignored by the receiver.

The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume the =
field labeled =E2=80=9CX=E2=80=9D should
be

relabeled as =E2=80=9Cr=E2=80=9D?

[v11] Page 11: changed to X.

9. Section 5:

   Figure 4.  If an intermediate router sends out RREQ-DIO with the S

   bit set to 1, then all the one-hop links on the route from the

   OrigNode O to this router meet the requirements of route discovery,

On first reading I didn=E2=80=99t understand this. Having read the whole do=
cument, I

now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=80=
=9Chave met=E2=80=9D would have
been

enough to get me past my initial befuddlement.

[v11] Page 11: changed to =E2=80=9Chas met=E2=80=9D

10. Section 5:

   The criteria used to determine whether or not each link is symmetric

   is beyond the scope of the document.  For instance, intermediate

Should be =E2=80=9Ccriterion =E2=80=A6 is beyond", or "criteria =E2=80=A6 a=
re beyond", depending on

whether you want singular or plural.

[v11] Page12, Not Corrected. [Can this be addressed by the RFC Editor?]



11. Section 5:

  routers can use local information (e.g., bit rate, bandwidth, number

  of cells used in 6tisch)

I wouldn=E2=80=99t have minded a reference for 6tisch.

[v11]Page 12, reference added, new text: ...cells used in 6tisch [RFC9030
<https://datatracker.ietf.org/doc/html/rfc9030>])...


12. Section 5:

   Upon receiving a RREQ-DIO with the S bit set to 1, a node determines

   whether this one-hop link can be used symmetrically, i.e., both the

   two directions meet the requirements of data transmission.  If the

   RREQ-DIO arrives over an interface that is not known to be symmetric,

   or is known to be asymmetric, the S bit is set to 0.  If the S bit

   arrives already set to be '0', it is set to be '0' on retransmission

The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess you m=
ean something
like

=E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.

[v11] Page 12, changed to propagated: ..when the RREQ-DIO is propagated.

13. Section 5:

  Appendix A describes an example method using the upstream Expected

  Number of Transmissions" (ETX) and downstream Received Signal

  Strength Indicator (RSSI) to estimate whether the link is symmetric

  in terms of link quality is given in using an averaging technique.

This sentence needs a rewrite to make it grammatical. It works up until "is

given in using an averaging technique=E2=80=9D.

[v11] Page 13, new text: =E2=80=9C Appendix A
<https://datatracker.ietf.org/doc/html/draft-ietf-roll-aodv-rpl-11#appendix=
-A>
describes an example method using the upstream Expected

   Number of Transmissions (ETX) and downstream Received Signal Strength

   Indicator (RSSI) to estimate whether the link is symmetric in terms

   of link quality using an averaging technique.=E2=80=9D

14. Section 6.2.1:

     If the S bit in the received RREQ-DIO is set to 1, the router MUST

     determine whether each direction of the link (by which the RREQ-

     DIO is received) satisfies the Objective Function.  In case that

     the downward (i.e. towards the TargNode) direction of the link

     does not satisfy the Objective Function, the link can't be used

     symmetrically, thus the S bit of the RREQ-DIO to be sent out MUST

     be set as 0.  If the S bit in the received RREQ-DIO is set to 0,

     the router MUST determine into the upward direction (towards the

     OrigNode) of the link.

The last sentence doesn=E2=80=99t make sense.

[v11] Page 14, Step 1 section was re-written, new text:=E2=80=9DStep 1:

      The router MUST first determine whether to propagate the RREQ-DIO.

      It does this by determining whether or not the downstream

      direction of the incoming link satisfies the Objective Function

      (OF).  If not the RREQ-DIO MUST be dropped, and the following

      steps are not processed.  Otherwise, the router MUST join the

      RREQ-Instance and prepare to propagate the RREQ-DIO.  The upstream

      neighbor router that transmitted the received RREQ-DIO is selected

      as the preferred parent.=E2=80=9D

15. Section 6.2.1:

     If the router is an intermediate router, then it transmits a RREQ-

     DIO via link-local multicast;

On what interface? Routers generally can have multiple interfaces. Again,
this

is a place a clear description of the network environment might have helped=
.

[v11] Page 15, Step 4 new text as follows: =E2=80=9CStep 4:

      The router checks whether one of its addresses is included in one

      of the ART Options.  If so, this router is one of the TargNodes.

      Otherwise, it is an intermediate router.

      If the router is an intermediate router, then it transmits the

      RREQ-DIO via link-local multicast; if the H bit is set to 0, the

      intermediate router MUST include the address of the interface

      receiving the RREQ-DIO into the address vector.  Otherwise, the

      router is TargNode; if it was not already associated with the

      RREQ-Instance, it prepares and transmits a RREP-DIO (Section 6.3
<https://datatracker.ietf.org/doc/html/draft-ietf-roll-aodv-rpl-11#section-=
6.3>
).

      If, on the other hand, TargNode was already associated with the

      RREQ-Instance, it takes no further action and does not send an

      RREP-DIO.=E2=80=9D

16. Section 6.2.2:

  If the OrigNode tries to reach multiple TargNodes in a single RREQ-

  Instance, one of the TargNodes can be an intermediate router to the

  others, therefore it MUST continue sending RREQ-DIO to reach other

  targets.  In this case, before rebroadcasting the RREQ-DIO

The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is this =
=E2=80=9Cbroadcast=E2=80=9D in
the RF

sense? Again, this is a place a clear description of the network environmen=
t

might have helped.

[v11] Page 16, rebroadcasting changed to transmitting, new text states: =E2=
=80=9C
If the OrigNode tries to reach multiple TargNodes in a single RREQ-

   Instance, one of the TargNodes can be an intermediate router to the

   others, therefore it MUST continue sending RREQ-DIO to reach other

   targets.  In this case, before transmitting the RREQ-DIO via link-

   local multicast, a TargNode MUST delete the Target Option

   encapsulating its own address, so that downstream routers with higher

   Rank values do not try to create a route to this TargNode.=E2=80=9D

17. Section 6.2.2:

  send out any RREQ-DIO.  For the purposes of determining the

  intersection with previous incoming RREQ-DIOs, the intermediate

  router maintains a record of the targets that have been requested

  associated with the RREQ-Instance.  Any RREQ-DIO message with

  different ART Options coming from a router with higher Rank is

  ignored.

It=E2=80=99s not clear to me if the last sentence goes with the previous an=
d if so,

how. Does it even relate to multiple targets? Also, different from what? If
it

has the same ART Options (same as what?) is it *not* ignored?

[v11] Page 16, new text: =E2=80=9C ...If the intersection is empty, it

   means that all the targets have been reached, and the router MUST NOT

   transmit any RREQ-DIO.  For the purposes of determining the

   intersection with previous incoming RREQ-DIOs, the intermediate

   router maintains a record of the targets that have been requested for

   a given RREQ-Instance.  Any incoming RREQ-DIO message having multiple

   ART Options coming from a router with higher Rank than the Rank of

   the stored targets is ignored.=E2=80=9D

18. Section 6.3.1:

  implementation-specific and out of scope.  If the implementation

  selects the symmetric route, and the L bit is not 0, the TargNode MAY

  delay transmitting the RREP-DIO for duration RREP_WAIT_TIME to await

  a symmetric route with a lower Rank.  The value of RREP_WAIT_TIME is

  set by default to 1/4 of the time duration determined by the L bit.

It=E2=80=99s not an L bit though, it=E2=80=99s an L field.

[v11] L bit was changed to L field in the document

19. Section 6.3.2:

  multicast until the OrigNode is reached or MaxRank is exceeded.  The

  TargNode MAY delay transmitting the RREP-DIO for duration

  RREP_WAIT_TIME to await a route with a lower Rank.  The value of

  RREP_WAIT_TIME is set by default to 1/4 of the time duration

  determined by the L bit.

Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_TIME =
set to

infinity, as the text implies?

Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are additio=
nal instances I

haven=E2=80=99t called out.

[v11] L bit was changed to L field in the document

20. Section 6.4:

  Step 4:

      If the receiver is the OrigNode, it can start transmitting the

      application data to TargNode along the path as provided in RREP-

      Instance, and processing for the RREP-DIO is complete.  Otherwise,

      in case of an asymmetric route, the intermediate router MUST

      include the address of the interface receiving the RREP-DIO into

      the address vector, and then transmit the RREP-DIO via link-local

      multicast.  In case of a symmetric route, the RREP-DIO message is

As with #15: on what interface(s)?

[v11] Page 19,  Step 4 first paragraph remains the same,

Charlie made a question: =E2=80=9C Are we assuming a single interface?=E2=
=80=9D

----------------------------------------------------------------------

RESPONSE to Comment 20:

----------------------------------------------------------------------

AODV-RPL routers can have multiple router interfaces.  Per-node

configuration of "RREP-DIO transmission interfaces" is an administrative

feature which is beyond the scope of the document.

21. Section 10:

  fake AODV-RPL route discoveries.  In this type of scenario, RPL's

  preinstalled mode of operation, where the key to use for a P2P-RPL

  route discovery is preinstalled, SHOULD be used.

What type of scenario is that?

[V11] Page 22, new text: When rogue routers might be  present, RPL's
preinstalled mode of operation, where the key to use  for route discovery
is preinstalled, SHOULD be used.


22. Appendix A:

s/pakcet/packet/

[V11] Page 25, fixed.

23. General remark:

Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required sectio=
n I was a little
surprised

not to encounter it, as it=E2=80=99s usually present. Your call of course.

[v11] Added


Thank you very much,

Ines.

On Fri, May 7, 2021 at 4:58 AM Charlie Perkins <
charles.perkins@earthlink.net> wrote:

> Hello John,
>
> It's taken a while for me to get to this, please excuse the delay. I
> have some followup to your comments interspersed below.
>
> On 4/19/2021 1:31 PM, John Scudder via Datatracker wrote:
> > John Scudder has entered the following ballot position for
> > draft-ietf-roll-aodv-rpl-10: Discuss
> >
> > When responding, please keep the subject line intact and reply to all
> > email addresses included in the To and CC lines. (Feel free to cut this
> > introductory paragraph, however.)
> >
> >
> > Please refer to
> https://www.ietf.org/iesg/statement/discuss-criteria.html
> > for more information about DISCUSS and COMMENT positions.
> >
> >
> > The document, along with other ballot positions, can be found here:
> > https://datatracker.ietf.org/doc/draft-ietf-roll-aodv-rpl/
> >
> >
> >
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > A lot of effort has clearly gone into this work, thank you. I do have
> one topic
> > I want to DISCUSS, as it seriously impacted the readability of the
> document
> > from my point of view. I don=E2=80=99t anticipate that it will be very =
difficult
> to
> > resolve this DISCUSS as it relates to clarity and not to anything
> fundamental.
> >
> > My chief difficulty with the document is placing it in context. No hint=
s
> are
> > given to the reader as to what the expected network environment is. I
> think it
> > would be almost sufficient to say, for example =E2=80=9Cthe network env=
ironment
> is
> > assumed to be the same as described in RFC 6550, Section 1=E2=80=9D for=
 example,
> but
> > without that hint and without a strong background in ROLL, I found myse=
lf
> > struggling. Figures 4 and 5 in particular lead me to believe the expect=
ed
> > environment looks similar to a classic ISP network =E2=80=94 a collecti=
on of
> nodes
> > connected by point-to-point links. If this isn=E2=80=99t correct (and I=
 bet it=E2=80=99s
> not)
> > that may have led me into incorrect assumptions, which may be reflected
> in my
> > other comments below.
> >
> > Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended =
to stand
> alone
> > as its own routing protocol, or to be viewed as an extension of RPL. In
> the
> > former case, it seems the document is lacking details that are present
> in RFC
> > 6550. I=E2=80=99m assuming the latter is the case, but a clear statemen=
t to that
> effect
> > seems indicated.
> How about this text:
>     Routing Protocol for Low-Power and Lossy Networks (RPL) [RFC6550] is
>     an IPv6 distance vector routing protocol designed to support multiple
>     traffic flows through a root-based Destination-Oriented Directed
>     Acyclic Graph (DODAG).  Typically, a router does not have routing
>     information for most other routers.  Consequently, for traffic
>     between routers within the DODAG (i.e., Point-to-Point (P2P) traffic)
>     data packets either have to traverse the root in non-storing mode, or
>     traverse a common ancestor in storing mode.  Such P2P traffic is
>     thereby likely to traverse longer routes and may suffer severe
>     congestion near the root (for more information see [RFC6997],
>     [RFC6998]). The network environment that is considered in this docume=
nt
>     assumed to be the same as described in Section 1 of [RFC6550].
>
> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
> >
> > 1. Section 1:
> >
> >     Reply.  AODV-RPL currently omits some features compared to AODV -- =
in
> >     particular, flagging Route Errors, blacklisting unidirectional link=
s,
> >     multihoming, and handling unnumbered interfaces.
> >
> > Your use of language is entirely up to you, but I feel obliged to point
> out
> > that there=E2=80=99s been a lot of discussion in the IETF community rec=
ently
> about use
> > of language that raises sensitive points, and about the term
> =E2=80=9Cblacklisting=E2=80=9D in
> > particular. I understand that this is the only place in the document th=
e
> term
> > appears, and since it refers to AODV you can=E2=80=99t just use another=
 term, but
> > placing it in quotation marks might make it clear that it=E2=80=99s ref=
erring
> verbatim
> > to the language of RFC 3561.
>
> This is an evolving issue.  I am fine with using quotes but otherwise
> maintaining consistent terminology.  For instance,
>
>      AODV-RPL currently omits some features compared to AODV -- in
>      particular, flagging Route Errors, "blacklisting" unidirectional lin=
ks
>      [RFC3561], multihoming, and handling unnumbered interfaces.
>
> If there is an official list of terms to search for please let us know.
>
> >
> > 2. Section 1:
> >
> >    support for storing and non-storing modes.  AODV adds basic messages
> >    RREQ and RREP as part of RPL DIO (DODAG Information Object) control
> >
> > Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?
> Yes, will fix.
>
> >
> > 3. Section 2:
> >
> >     Symmetric route
> >        The upstream and downstream routes traverse the same routers.
> >
> > Same routers? Or same links? (Or both, if multi-access links are part o=
f
> the
> > mix, as I imagine they may be?)
>
>        The upstream and downstream routes traverse the same routers and
> over
>        the same links.
> > 4. Section 4.1:
> >
> >     OrigNode sets its IPv6 address in the DODAGID field of the RREQ-DIO
> >     message.  A RREQ-DIO message MUST carry exactly one RREQ option,
> >
> > Should that say =E2=80=9Cone of its IPv6 addresses"? Is it even necessa=
ry to
> restate
> > this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:
> >
> >     DODAGID: 128-bit IPv6 address set by a DODAG root that uniquely
> >           identifies a DODAG.  The DODAGID MUST be a routable IPv6
> >           address belonging to the DODAG root.
>
> I'm not quite sure what is requested.  Should it be "OrigNode sets the
> DODAGID field", relying on the definition provided in RFC 6550? Should
> it be "OrigNode sets one of its routable IPv6 address in the DODAGID
> field"?
> Honestly, I thought the meaning was clear.  Unless there is an
> objection, I reckon we will use the latter wording.
>
> >
> > 5. Section S4.1:
> >
> >    TargNode can join the RREQ instance at a Rank whose integer portion
> >    is equal to the MaxRank.
> >
> > Not less than or equal, right? Strict equality to MaxRank is required?
> The existing text isn't good.  Instead,
>
>     TargNode can join the RREQ instance at a Rank whose integer portion
>     is less than the MaxRank.
>
>
> > 6. Section 4.2:
> >
> >     TargNode sets its IPv6 address in the DODAGID field of the RREP-DIO
> >     message.  A RREP-DIO message MUST carry exactly one RREP option,
> >
> > Same as #4.
> >
> > 7. Section 4.2:
> >
> >    Address Vector
> >       Only present when the H bit is set to 0.  For an asymmetric route=
,
> >       the Address Vector represents the IPv6 addresses of the route tha=
t
> >       the RREP-DIO has passed.
> >
> > The first time I read through this, I didn=E2=80=99t understand it at a=
ll. On
> > re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=
=9D in two different ways
> in the
> > same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the se=
nse of an object
> in the
> > protocol, the second time in the more casual sense of =E2=80=9Ca path t=
hrough the
> > network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the seco=
nd instance, as
> in =E2=80=9C=E2=80=A6
> > represents the IPv6 addresses of the path through the network the
> RREP-DIO has
> > traversed.=E2=80=9D
> >
> > Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=
=E2=80=99t
> any
> > given node have various IPv6 addresses? So maybe just lose the definite
> > article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the path=
=E2=80=A6=E2=80=9D?
>
> Good point.  We will use your formulation.
>
> >
> > 8. Section 4.3:
> >
> >    r
> >       A one-bit reserved field.  This field MUST be initialized to zero
> >       by the sender and MUST be ignored by the receiver.
> >
> > The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume =
the field labeled =E2=80=9CX=E2=80=9D
> should be
> > relabeled as =E2=80=9Cr=E2=80=9D?
> Actually, the description should refer to an "X" field, not an "r"
> field.  We will update.
>
>
> >
> > 9. Section 5:
> >
> >     Figure 4.  If an intermediate router sends out RREQ-DIO with the S
> >     bit set to 1, then all the one-hop links on the route from the
> >     OrigNode O to this router meet the requirements of route discovery,
> >
> > On first reading I didn=E2=80=99t understand this. Having read the whol=
e
> document, I
> > now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=
=80=9Chave met=E2=80=9D would have
> been
> > enough to get me past my initial befuddlement.
>
> Yes, that's better.
>
> >
> > 10. Section 5:
> >
> >     The criteria used to determine whether or not each link is symmetri=
c
> >     is beyond the scope of the document.  For instance, intermediate
> >
> > Should be =E2=80=9Ccriterion =E2=80=A6 is beyond", or "criteria =E2=80=
=A6 are beyond", depending
> on
> > whether you want singular or plural.
> We will use "criteria =E2=80=A6 are beyond".
>
> >
> > 11. Section 5:
> >
> >    routers can use local information (e.g., bit rate, bandwidth, number
> >    of cells used in 6tisch)
> >
> > I wouldn=E2=80=99t have minded a reference for 6tisch.
> No problem.
>
> >
> > 12. Section 5:
> >
> >     Upon receiving a RREQ-DIO with the S bit set to 1, a node determine=
s
> >     whether this one-hop link can be used symmetrically, i.e., both the
> >     two directions meet the requirements of data transmission.  If the
> >     RREQ-DIO arrives over an interface that is not known to be symmetri=
c,
> >     or is known to be asymmetric, the S bit is set to 0.  If the S bit
> >     arrives already set to be '0', it is set to be '0' on retransmissio=
n
> >
> > The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess y=
ou mean something
> like
> > =E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.
> That is better.  We will use that.
>
> >
> > 13. Section 5:
> >
> >    Appendix A describes an example method using the upstream Expected
> >    Number of Transmissions" (ETX) and downstream Received Signal
> >    Strength Indicator (RSSI) to estimate whether the link is symmetric
> >    in terms of link quality is given in using an averaging technique.
> >
> > This sentence needs a rewrite to make it grammatical. It works up until
> "is
> > given in using an averaging technique=E2=80=9D.
> How about:
>      Appendix A describes an example method using the upstream Expected
>      Number of Transmissions" (ETX) and downstream Received Signal
>      Strength Indicator (RSSI) to estimate whether the link is symmetric
>      in terms of link quality using an averaging technique.
>
>
> >
> > 14. Section 6.2.1:
> >
> >       If the S bit in the received RREQ-DIO is set to 1, the router MUS=
T
> >       determine whether each direction of the link (by which the RREQ-
> >       DIO is received) satisfies the Objective Function.  In case that
> >       the downward (i.e. towards the TargNode) direction of the link
> >       does not satisfy the Objective Function, the link can't be used
> >       symmetrically, thus the S bit of the RREQ-DIO to be sent out MUST
> >       be set as 0.  If the S bit in the received RREQ-DIO is set to 0,
> >       the router MUST determine into the upward direction (towards the
> >       OrigNode) of the link.
> >
> > The last sentence doesn=E2=80=99t make sense.
> How about:
>                 ...  If the S bit in the received RREQ-DIO is set to 0,
>       the router MUST determine the upward direction (towards the
>       OrigNode) of the link.
> >
> > 15. Section 6.2.1:
> >
> >       If the router is an intermediate router, then it transmits a RREQ=
-
> >       DIO via link-local multicast;
> >
> > On what interface? Routers generally can have multiple interfaces.
> Again, this
> > is a place a clear description of the network environment might have
> helped.
>
> The link-local multicast should go out over all local interfaces.
>
> >
> > 16. Section 6.2.2:
> >
> >    If the OrigNode tries to reach multiple TargNodes in a single RREQ-
> >    Instance, one of the TargNodes can be an intermediate router to the
> >    others, therefore it MUST continue sending RREQ-DIO to reach other
> >    targets.  In this case, before rebroadcasting the RREQ-DIO
> >
> > The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is th=
is =E2=80=9Cbroadcast=E2=80=9D in
> the RF
> > sense? Again, this is a place a clear description of the network
> environment
> > might have helped.
> This needs to be reformulated to avoid suggesting anything about RF
> broadcast.  TBD.
>
> >
> > 17. Section 6.2.2:
> >
> >    send out any RREQ-DIO.  For the purposes of determining the
> >    intersection with previous incoming RREQ-DIOs, the intermediate
> >    router maintains a record of the targets that have been requested
> >    associated with the RREQ-Instance.  Any RREQ-DIO message with
> >    different ART Options coming from a router with higher Rank is
> >    ignored.
> >
> > It=E2=80=99s not clear to me if the last sentence goes with the previou=
s and if
> so,
> > how. Does it even relate to multiple targets? Also, different from what=
?
> If it
> > has the same ART Options (same as what?) is it *not* ignored?
> How about:
>                    .....                     For the purposes of
> determining the
>    intersection with previous incoming RREQ-DIOs, the intermediate
>    router maintains a record of the targets that have been requested
>    associated with the RREQ-Instance. Any incoming RREQ-DIO message havin=
g
>    multiple ART Options coming from a router with higher Rank than the
> Rank of
>    the stored targets is ignored.
>
> >
> > 18. Section 6.3.1:
> >
> >    implementation-specific and out of scope.  If the implementation
> >    selects the symmetric route, and the L bit is not 0, the TargNode MA=
Y
> >    delay transmitting the RREP-DIO for duration RREP_WAIT_TIME to await
> >    a symmetric route with a lower Rank.  The value of RREP_WAIT_TIME is
> >    set by default to 1/4 of the time duration determined by the L bit.
> >
> > It=E2=80=99s not an L bit though, it=E2=80=99s an L field.
> Good point!
>
> >
> > 19. Section 6.3.2:
> >
> >    multicast until the OrigNode is reached or MaxRank is exceeded.  The
> >    TargNode MAY delay transmitting the RREP-DIO for duration
> >    RREP_WAIT_TIME to await a route with a lower Rank.  The value of
> >    RREP_WAIT_TIME is set by default to 1/4 of the time duration
> >    determined by the L bit.
> >
> > Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_T=
IME set to
> > infinity, as the text implies?
> Thanks for pointing this out.  We need to be explicit about it.  I don't
> think the RREP_WAIT_TIME should ever be zero or infinity. But, if it
> were, the implementations would still be interoperable in a sense.  Do
> we really want to get into exactly what wait times make sense in this
> context?
>
>
> >
> > Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are add=
itional instances
> I
> > haven=E2=80=99t called out.
> >
> > 20. Section 6.4:
> >
> >    Step 4:
> >
> >        If the receiver is the OrigNode, it can start transmitting the
> >        application data to TargNode along the path as provided in RREP-
> >        Instance, and processing for the RREP-DIO is complete.  Otherwis=
e,
> >        in case of an asymmetric route, the intermediate router MUST
> >        include the address of the interface receiving the RREP-DIO into
> >        the address vector, and then transmit the RREP-DIO via link-loca=
l
> >        multicast.  In case of a symmetric route, the RREP-DIO message i=
s
> >
> > As with #15: on what interface(s)?
> It should go out to all the neighbors over multiple interfaces if
> necessary.
>
> >
> > 21. Section 10:
> >
> >    fake AODV-RPL route discoveries.  In this type of scenario, RPL's
> >    preinstalled mode of operation, where the key to use for a P2P-RPL
> >    route discovery is preinstalled, SHOULD be used.
> >
> > What type of scenario is that?
>
>   "In this type of scenario" -> "When rogue routers might be present"
>
> >
> > 22. Appendix A:
> >
> > s/pakcet/packet/
> Check.
> >
> > 23. General remark:
> >
> > Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required se=
ction I was a little
> surprised
> > not to encounter it, as it=E2=80=99s usually present. Your call of cour=
se.
> Acknowledgements are due to a lot of people - thanks for the reminder!
>
> Naturally Yours,
> Charlie P.
>
>

--000000000000c18f0d05d00fa739
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<div dir=3D"ltr"><div dir=3D"ltr"><font face=3D"arial, sans-serif">Hello Jo=
hn,</font><div><font face=3D"arial, sans-serif"><br></font></div><div><font=
 face=3D"arial, sans-serif">Thank you for your comments to improve the docu=
ment. We believe that v11 addresses your DISCUSS points, please let us know=
.=C2=A0</font></div><div><font face=3D"arial, sans-serif"><br></font></div>=
<div><font face=3D"arial, sans-serif">Please find comments below correspond=
ing to version 11 in [v11]=C2=A0</font></div><div><font face=3D"arial, sans=
-serif"><br></font></div><div><span id=3D"m_4092764220379430868gmail-docs-i=
nternal-guid-fcc6b48a-7fff-be72-31a2-83a4cdc0ec85"><font face=3D"arial, san=
s-serif"><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bot=
tom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">---------------------=
-------------------------------------------------</span></p><p dir=3D"ltr" =
style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">DISCUSS:</span></p><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varian=
t-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whi=
te-space:pre-wrap">--------------------------------------------------------=
--------------</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margi=
n-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">A=
 lot of effort has clearly gone into this work, thank you. I do have one to=
pic</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margi=
n-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap">I want to DISCUS=
S, as it seriously impacted the readability of the document</span></p><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">from my point of view. I don=E2=80=
=99t anticipate that it will be very difficult to</span></p><p dir=3D"ltr" =
style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">resolve this DISCUSS as it relates to clarity=
 and not to anything fundamental.</span></p><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant=
-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whit=
e-space:pre-wrap">My chief difficulty with the document is placing it in co=
ntext. No hints are</span></p><p dir=3D"ltr" style=3D"line-height:1.38;marg=
in-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
given to the reader as to what the </span><span style=3D"font-variant-numer=
ic:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spac=
e:pre-wrap">expected network environment is</span><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">. I think it</span></p><p dir=3D"ltr" style=3D"line-hei=
ght:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-nume=
ric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spa=
ce:pre-wrap">would be almost sufficient to say, for example =E2=80=9C</span=
><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;=
vertical-align:baseline;white-space:pre-wrap">the network environment is</s=
pan></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bott=
om:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">assumed to be the same=
 as described in RFC 6550</span><span style=3D"font-variant-numeric:normal;=
font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap=
">, Section 1=E2=80=9D for example, but</span></p><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">without that hint and without a strong background in RO=
LL, I found myself</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margi=
n-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">s=
truggling. Figures 4 and 5 in particular lead me to believe the expected</s=
pan></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bott=
om:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">environment looks simi=
lar to a classic ISP network =E2=80=94 a collection of nodes</span></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">connected by point-to-point links.=
 If this isn=E2=80=99t correct (and I bet it=E2=80=99s not)</span></p><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">that may have led me into incorrect=
 assumptions, which may be reflected in my</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">other comments below.</span></p><br><p dir=3D"ltr"=
 style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D=
"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:nor=
mal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 3, new text: <=
/span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-va=
riant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The n=
etwork environment that is considered in this</span></p><p dir=3D"ltr" styl=
e=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"colo=
r:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;v=
ertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0document is =
assumed to be the same as described in</span><a href=3D"https://datatracker=
.ietf.org/doc/html/rfc6550#section-1" style=3D"text-decoration-line:none" t=
arget=3D"_blank"><span style=3D"color:rgb(0,0,255);font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap"> </span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal=
;font-variant-east-asian:normal;text-decoration-line:underline;vertical-ali=
gn:baseline;white-space:pre-wrap">Section 1 of</span></a></p><p dir=3D"ltr"=
 style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href=3D"htt=
ps://datatracker.ietf.org/doc/html/rfc6550#section-1" style=3D"text-decorat=
ion-line:none" target=3D"_blank"><span style=3D"color:rgb(0,0,255);font-var=
iant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:und=
erline;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0[RFC=
6550]</span></a><span style=3D"color:rgb(0,0,255);font-variant-numeric:norm=
al;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-w=
rap">.</span><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0</span></p>=
<br><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bott=
om:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">Further, it=E2=80=99s =
not stated anywhere </span><span style=3D"font-variant-numeric:normal;font-=
variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">whe=
ther AODV-RPL is intended to stand alone</span></p><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">as its own routing protocol, or to be viewed as an ext=
ension of RPL</span><span style=3D"font-weight:700;font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">.</span><span style=3D"font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap"> In the</span></=
p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">former case, it seems the do=
cument is lacking details that are present in RFC</span></p><p dir=3D"ltr" =
style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">6550. I=E2=80=99m assuming the latter is the =
case, but a clear statement to that effect</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">seems indicated.</span></p><br><p dir=3D"ltr" styl=
e=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"colo=
r:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;v=
ertical-align:baseline;white-space:pre-wrap">[v11] Page 3, </span><span sty=
le=3D"color:rgb(0,0,255);white-space:pre-wrap">new text</span><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;color:rgb(0,=
0,255);vertical-align:baseline;white-space:pre-wrap">:  </span><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;color:rgb(0,=
0,255);vertical-align:baseline;white-space:pre-wrap">AODV-RPL reuses and ex=
tends the core RPL functionality to support</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color=
:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0routes with b=
idirectional asymmetric links </span></p><br><br><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">--------------------------------------------------=
--------------------</span></p><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>COMMENT:</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant=
-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">----------=
------------------------------------------------------------</span></p><br>=
<p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt">=
<span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;v=
ertical-align:baseline;white-space:pre-wrap">1. Section 1:</span></p><br><p=
 dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><s=
pan style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ver=
tical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Reply.=C2=A0 A=
ODV-RPL currently omits some features compared to AODV -- in</span></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0particular, flag=
ging Route Errors, blacklisting unidirectional links,</span></p><p dir=3D"l=
tr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0multihoming, and handli=
ng unnumbered interfaces.</span></p><br><p dir=3D"ltr" style=3D"line-height=
:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">Your use of language is entirely up to you, but I feel obliged to=
 point out</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">that ther=
e=E2=80=99s been a lot of discussion in the IETF community recently about u=
se</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">of language that =
raises sensitive points, and about the term =E2=80=9Cblacklisting=E2=80=9D =
in</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">particular. I und=
erstand that this is the only place in the document the term</span></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">appears, and since it refers to AO=
DV you can=E2=80=99t just use another term, but</span></p><p dir=3D"ltr" st=
yle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"fo=
nt-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:bas=
eline;white-space:pre-wrap">placing it in quotation marks might make it cle=
ar that it=E2=80=99s referring verbatim</span></p><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">to the language of RFC 3561.</span></p><br><p dir=3D"lt=
r" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">[v11] </span><span sty=
le=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asia=
n:normal;vertical-align:baseline;white-space:pre-wrap">(Page 3), </span><sp=
an style=3D"color:rgb(0,0,255);white-space:pre-wrap">new text</span><span s=
tyle=3D"font-variant-numeric:normal;font-variant-east-asian:normal;color:rg=
b(0,0,255);vertical-align:baseline;white-space:pre-wrap">: </span><span sty=
le=3D"font-variant-numeric:normal;font-variant-east-asian:normal;color:rgb(=
0,0,255);vertical-align:baseline;white-space:pre-wrap">=C2=A0</span><span s=
tyle=3D"font-variant-numeric:normal;font-variant-east-asian:normal;color:rg=
b(0,0,255);vertical-align:baseline;white-space:pre-wrap">AODV-RPL currently=
 omits some features compared to AODV -- in</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color=
:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0particular, f=
lagging Route Errors, &quot;blacklisting&quot; unidirectional</span></p><p =
dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><sp=
an style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-eas=
t-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
=C2=A0links ([</span><a href=3D"https://datatracker.ietf.org/doc/html/rfc35=
61" style=3D"text-decoration-line:none" target=3D"_blank"><span style=3D"co=
lor:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal=
;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wra=
p">RFC3561</span></a><span style=3D"color:rgb(0,0,255);font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">]), multihoming, and handling unnumbered interfaces.=C2=A0</span>=
</p><br><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">2. Section 1:</spa=
n></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bo=
ttom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asia=
n:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0support =
for storing and non-storing modes.=C2=A0 AODV adds basic messages</span></p=
><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"=
><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;=
vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0RREQ and RREP as =
part of RPL DIO (DODAG Information Object) control</span></p><br><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Did you mean =E2=80=9CAODV-RPL adds=E2=
=80=9D?</span></p><br><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-nu=
meric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-s=
pace:pre-wrap">[v11] Page 3: It was changed to </span><span style=3D"color:=
rgb(0,0,255);font-weight:700;font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap">AODV-RPL adds ba=
sic messages</span></p><br><br><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>3. Section 2:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margi=
n-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0Symmetric route</span></p><p dir=3D"ltr" style=3D"line-he=
ight:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-num=
eric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-sp=
ace:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The upstream and downstre=
am routes traverse the same routers.</span></p><br><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">Same routers? Or same links? (Or both, if multi-access=
 links are part of the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p">mix, as I imagine they may be?)</span></p><br><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0=
,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical=
-align:baseline;white-space:pre-wrap">[v11] Page 5, </span><span style=3D"c=
olor:rgb(0,0,255);white-space:pre-wrap">new text</span><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;color:rgb(0,0,255);ve=
rtical-align:baseline;white-space:pre-wrap">: </span><span style=3D"font-va=
riant-numeric:normal;font-variant-east-asian:normal;color:rgb(0,0,255);vert=
ical-align:baseline;white-space:pre-wrap">Symmetric route: The upstream and=
 downstream routes traverse the same routers and</span></p><p dir=3D"ltr" s=
tyle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"c=
olor:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:norma=
l;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0over the same links.</span></p><br><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant=
-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whit=
e-space:pre-wrap">4. Section 4.1:</span></p><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant=
-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whit=
e-space:pre-wrap">=C2=A0=C2=A0=C2=A0OrigNode sets its IPv6 address in the D=
ODAGID field of the RREQ-DIO</span></p><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">=C2=A0=C2=A0=C2=A0message.=C2=A0 A RREQ-DIO message MUST carry exa=
ctly one RREQ option,</span></p><br><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">Should that say =E2=80=9Cone of its IPv6 addresses&quot;? Is it even =
necessary to restate</span></p><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:</span></p><b=
r><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0DODAGID: 1=
28-bit IPv6 address set by a DODAG root that uniquely</span></p><p dir=3D"l=
tr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0identifies a DODAG.=C2=A0 The DODAGID MUST be a routable IPv=
6</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0address belonging to the DODAG root.</s=
pan></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>[v11] Page 6-New text: </span><span style=3D"color:rgb(0,0,255);font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">OrigNode selects one of its IPv6 addresses and sets it =
in the DODAGID</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-to=
p:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-num=
eric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-sp=
ace:pre-wrap">=C2=A0=C2=A0=C2=A0field of the RREQ-DIO message.</span></p><b=
r><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom=
:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:no=
rmal;vertical-align:baseline;white-space:pre-wrap">5. Section S4.1:</span><=
/p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-botto=
m:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0TargNode ca=
n join the RREQ instance at a Rank whose integer portion</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0is equal to the MaxRank.=
</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;marg=
in-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">Not less than o=
r equal, right? Strict equality to MaxRank is required?</span></p><br><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 8, ne=
w text: </span><span style=3D"color:rgb(0,0,255);font-variant-numeric:norma=
l;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wr=
ap">TargNode can join the RREQ instance at a Rank whose integer portion</sp=
an></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-botto=
m:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0=C2=A0=C2=A0is less than or equal to the MaxRank.</span></p><br><br><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">6. Section 4.2:</span></p><br><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0TargNode sets it=
s IPv6 address in the DODAGID field of the RREP-DIO</span></p><p dir=3D"ltr=
" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0message.=C2=A0 A RREP-D=
IO message MUST carry exactly one RREP option,</span></p><br><p dir=3D"ltr"=
 style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D=
"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:=
baseline;white-space:pre-wrap">Same as #4.</span></p><br><p dir=3D"ltr" sty=
le=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"col=
or:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;=
vertical-align:baseline;white-space:pre-wrap">[v11] Page 8, new text: </spa=
n><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">TargNode =
sets one of its IPv6 addresses in the DODAGID field of the</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0RREP-DIO message.</span></p><br><br><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">7. Section 4.2:</span></p><br><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">=C2=A0=C2=A0Address Vector</span></p><p dir=3D"ltr" style=3D"line-=
height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-n=
umeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-=
space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Only present when the H bit i=
s set to 0.=C2=A0 For an asymmetric route,</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the Address Vector r=
epresents the IPv6 addresses of the route that</span></p><p dir=3D"ltr" sty=
le=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"fon=
t-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:base=
line;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the RREP-DIO has p=
assed.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The first=
 time I read through this, I didn=E2=80=99t understand it at all. On</span>=
</p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0=
pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:norm=
al;vertical-align:baseline;white-space:pre-wrap">re-reading, I think you=E2=
=80=99re using the word =E2=80=9Croute=E2=80=9D in two different ways in th=
e</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">same sentence, the=
 first time to mean =E2=80=9Croute=E2=80=9D in the sense of an object in th=
e</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">protocol, the seco=
nd time in the more casual sense of =E2=80=9Ca path through the</span></p><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">network=E2=80=9D. If that=E2=80=
=99s right, I suggest rewriting the second instance, as in =E2=80=9C=E2=80=
=A6</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margi=
n-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap">represents the I=
Pv6 addresses of the path through the network the RREP-DIO has</span></p><p=
 dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><s=
pan style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ver=
tical-align:baseline;white-space:pre-wrap">Traversed.=E2=80=9D</span></p><b=
r><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><span style=3D"color:rgb(255,0,0);font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">[</span><=
span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">v11] Page 10=
, new text: </span><span style=3D"color:rgb(0,0,255);font-variant-numeric:n=
ormal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pr=
e-wrap">Address Vector</span></p><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-var=
iant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;=
white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Only present when=
 the H bit is set to 0.=C2=A0 For an asymmetric route,</span></p><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0the Address Vector represents the IPv6 addresses of the path=
</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-b=
ottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0through the network the RREP-DIO has pa=
ssed.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">Passed was not changed to Traversed.=C2=A0</span></p><br><br><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">Also, as in point #4, is it right t=
o say *the* IPv6 addresses? Couldn=E2=80=99t any</span></p><p dir=3D"ltr" s=
tyle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"f=
ont-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:ba=
seline;white-space:pre-wrap">given node have various IPv6 addresses? So may=
be just lose the definite</span></p><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the pa=
th=E2=80=A6=E2=80=9D?</span></p><br><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">8. Section 4.3:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">=C2=A0=C2=A0r</span></p><p dir=3D"ltr" style=3D"line-height:1.38;marg=
in-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0A one-bit reserved field.=C2=A0 This field MU=
ST be initialized to zero</span></p><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0by the sender and MUST be ignored by th=
e receiver.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The =
figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume the fiel=
d labeled =E2=80=9CX=E2=80=9D should be</span></p><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">relabeled as =E2=80=9Cr=E2=80=9D?</span></p><br><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 11: ch=
anged to X.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">9. S=
ection 5:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top=
:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-var=
iant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=
=C2=A0=C2=A0Figure 4.=C2=A0 If an intermediate router sends out RREQ-DIO wi=
th the S</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0bit set to 1, then all the one-hop links on the route from the</sp=
an></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-botto=
m:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0OrigN=
ode O to this router meet the requirements of route discovery,</span></p><b=
r><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">On first reading I didn=E2=
=80=99t understand this. Having read the whole document, I</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">now get it (I think!). Possibly chan=
ging =E2=80=9Cmeet=E2=80=9D to =E2=80=9Chave met=E2=80=9D would have been</=
span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bot=
tom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">enough to get me past=
 my initial befuddlement.</span></p><br><p dir=3D"ltr" style=3D"line-height=
:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);f=
ont-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:ba=
seline;white-space:pre-wrap">[v11] Page 11: changed to =E2=80=9Chas met=E2=
=80=9D</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">10. Secti=
on 5:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant=
-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0The criteria used to determine whether or not each link is symmetr=
ic</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0is beyond the scope of the document.=C2=A0 For instance, intermediate</s=
pan></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">Should be =E2=80=
=9Ccriterion =E2=80=A6 is beyond&quot;, or &quot;criteria =E2=80=A6 are bey=
ond&quot;, depending on</span></p><p dir=3D"ltr" style=3D"line-height:1.38;=
margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:norma=
l;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wr=
ap">whether you want singular or plural.</span></p><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap"><font color=3D"#741b47">[v11] Page12, Not Correcte=
d. [Can this be addressed by the RFC Editor?]</font></span></p><p dir=3D"lt=
r" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap"><font color=3D"#741b47"><br></font></span=
></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bot=
tom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">11. Section 5:</span>=
</p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bott=
om:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0routers ca=
n use local information (e.g., bit rate, bandwidth, number</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0of cells used in 6tisch)=
</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;marg=
in-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">I wouldn=E2=80=
=99t have minded a reference for 6tisch.</span></p><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color=
:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">[v11]Page 12, reference added, =
new text: ...</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">cells used in 6tisch [</span><a href=3D"https://datatracker.ietf.o=
rg/doc/html/rfc9030" style=3D"text-decoration-line:none" target=3D"_blank">=
<span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-=
east-asian:normal;text-decoration-line:underline;vertical-align:baseline;wh=
ite-space:pre-wrap">RFC9030</span></a><span style=3D"color:rgb(0,0,255);fon=
t-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:base=
line;white-space:pre-wrap">])...</span></p><br><br><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">12. Section 5:</span></p><br><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">=C2=A0=C2=A0=C2=A0Upon receiving a RREQ-DIO with the S =
bit set to 1, a node determines</span></p><p dir=3D"ltr" style=3D"line-heig=
ht:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numer=
ic:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spac=
e:pre-wrap">=C2=A0=C2=A0=C2=A0whether this one-hop link can be used symmetr=
ically, i.e., both the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p">=C2=A0=C2=A0=C2=A0two directions meet the requirements of data transmiss=
ion.=C2=A0 If the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin=
-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font=
-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0RREQ-DIO arrives over an interface that is not known to b=
e symmetric,</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:=
0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-vari=
ant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=
=C2=A0=C2=A0or is known to be asymmetric, the S bit is set to 0.=C2=A0 If t=
he S bit</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0arrives already set to be &#39;0&#39;, it is set to be &#39;0&#39;=
 on retransmission</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p">The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess yo=
u mean something like</span></p><p dir=3D"ltr" style=3D"line-height:1.38;ma=
rgin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;=
font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap=
">=E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.</span></p><br><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 12, ch=
anged to propagated: ..</span><span style=3D"color:rgb(0,0,255);font-varian=
t-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whi=
te-space:pre-wrap">when the RREQ-DIO is propagated.</span></p><br><p dir=3D=
"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span sty=
le=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-a=
lign:baseline;white-space:pre-wrap">13. Section 5:</span></p><br><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Appendix A describes an exam=
ple method using the upstream Expected</span></p><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varian=
t-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whi=
te-space:pre-wrap">=C2=A0=C2=A0Number of Transmissions&quot; (ETX) and down=
stream Received Signal</span></p><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p">=C2=A0=C2=A0Strength Indicator (RSSI) to estimate whether the link is sy=
mmetric</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;m=
argin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
in terms of link quality is given in using an averaging technique.</span></=
p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom=
:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:no=
rmal;vertical-align:baseline;white-space:pre-wrap">This sentence needs a re=
write to make it grammatical. It works up until &quot;is</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">given in using an averaging techniqu=
e=E2=80=9D.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-nu=
meric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-s=
pace:pre-wrap">[v11] Page 13, new text: =E2=80=9C</span><a href=3D"https://=
datatracker.ietf.org/doc/html/draft-ietf-roll-aodv-rpl-11#appendix-A" style=
=3D"text-decoration-line:none" target=3D"_blank"><span style=3D"color:rgb(0=
,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical=
-align:baseline;white-space:pre-wrap"> </span><span style=3D"color:rgb(0,0,=
255);font-variant-numeric:normal;font-variant-east-asian:normal;text-decora=
tion-line:underline;vertical-align:baseline;white-space:pre-wrap">Appendix =
A</span></a><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
> describes an example method using the upstream Expected</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0Number of Transmissions (ETX) and downstream Received Signal Strength</s=
pan></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bott=
om:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-=
variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0=C2=A0=C2=A0Indicator (RSSI) to estimate whether the link is symmetric i=
n terms</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;m=
argin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:no=
rmal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre=
-wrap">=C2=A0=C2=A0=C2=A0of link quality using an averaging technique.</spa=
n><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=E2=80=9D=
</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;marg=
in-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">14. Section 6.2=
.1:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;m=
argin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0If the S bit in the received RREQ-DIO is set to 1, the ro=
uter MUST</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant=
-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0determine whether each direction of the link (by which=
 the RREQ-</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0DIO is received) satisfies the Objective Function.=C2=
=A0 In case that</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-=
top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-=
variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0the downward (i.e. towards the TargNode) directi=
on of the link</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-to=
p:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-va=
riant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0does not satisfy the Objective Function, the lin=
k can&#39;t be used</span></p><p dir=3D"ltr" style=3D"line-height:1.38;marg=
in-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0symmetrically, thus the S bit of the RREQ-DIO=
 to be sent out MUST</span></p><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0be set as 0.=C2=A0 If the S bit in the recei=
ved RREQ-DIO is set to 0,</span></p><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the router MUST determine into the upwa=
rd direction (towards the</span></p><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0OrigNode) of the link.</span></p><br><p=
 dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><s=
pan style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ver=
tical-align:baseline;white-space:pre-wrap">The last sentence doesn=E2=80=99=
t make sense.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin=
-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-=
numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white=
-space:pre-wrap">[v11] Page 14, Step 1 section was re-written, new text:=E2=
=80=9D</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;=
font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap=
">Step 1:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top=
:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-nume=
ric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spa=
ce:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The router MUST first dete=
rmine whether to propagate the RREQ-DIO.</span></p><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb=
(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0It does this by determining whether or not the downstream</span></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0direction of the incoming link satisfies the Objective=
 Function</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0(OF).=C2=A0 If not the RREQ-DI=
O MUST be dropped, and the following</span></p><p dir=3D"ltr" style=3D"line=
-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0=
,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-a=
lign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0ste=
ps are not processed.=C2=A0 Otherwise, the router MUST join the</span></p><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0RREQ-Instance and prepare to propagate the RREQ-DIO=
.=C2=A0 The upstream</span></p><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0neighbor router tha=
t transmitted the received RREQ-DIO is selected</span></p><p dir=3D"ltr" st=
yle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"co=
lor:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0as the preferred parent.</span><span style=3D"color:rgb(0,0,255);f=
ont-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:ba=
seline;white-space:pre-wrap">=E2=80=9D</span></p><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">15. Section 6.2.1:</span></p><br><p dir=3D"ltr" st=
yle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"fo=
nt-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:bas=
eline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If the router is =
an intermediate router, then it transmits a RREQ-</span></p><p dir=3D"ltr" =
style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0DIO via link-lo=
cal multicast;</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margi=
n-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">O=
n what interface? Routers generally can have multiple interfaces. Again, th=
is</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">is a place a clea=
r description of the network environment might have helped.</span></p><br><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 1=
5, Step 4 new text as follows: =E2=80=9C</span><span style=3D"color:rgb(0,0=
,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-a=
lign:baseline;white-space:pre-wrap">Step 4:</span></p><br><p dir=3D"ltr" st=
yle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"co=
lor:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0The router checks whether one of its addresses is included in one<=
/span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bo=
ttom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0of the ART Options.=C2=A0 If so, this r=
outer is one of the TargNodes.</span></p><p dir=3D"ltr" style=3D"line-heigh=
t:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Otherwise=
, it is an intermediate router.</span></p><br><p dir=3D"ltr" style=3D"line-=
height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,=
255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If t=
he router is an intermediate router, then it transmits the</span></p><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0RREQ-DIO via link-local multicast; if the H bit is set=
 to 0, the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0intermediate router MUST incl=
ude the address of the interface</span></p><p dir=3D"ltr" style=3D"line-hei=
ght:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255=
);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align=
:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0receivi=
ng the RREQ-DIO into the address vector.=C2=A0 Otherwise, the</span></p><p =
dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><sp=
an style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-eas=
t-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0router is TargNode; if it was not already associate=
d with the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0RREQ-Instance, it prepares an=
d transmits a RREP-DIO (</span><a href=3D"https://datatracker.ietf.org/doc/=
html/draft-ietf-roll-aodv-rpl-11#section-6.3" style=3D"text-decoration-line=
:none" target=3D"_blank"><span style=3D"font-variant-numeric:normal;font-va=
riant-east-asian:normal;text-decoration-line:underline;vertical-align:basel=
ine;white-space:pre-wrap">Section 6.3</span></a><span style=3D"color:rgb(0,=
0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-=
align:baseline;white-space:pre-wrap">).</span></p><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(=
0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
If, on the other hand, TargNode was already associated with the</span></p><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0RREQ-Instance, it takes no further action and does =
not send an</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0=
pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeri=
c:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space=
:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0RREP-DIO.</span><span style=
=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">=E2=80=9D</span></p><b=
r><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">16. Section 6.2.2:</span></p=
><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:=
0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:nor=
mal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0If the OrigNo=
de tries to reach multiple TargNodes in a single RREQ-</span></p><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Instance, one of the TargNod=
es can be an intermediate router to the</span></p><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">=C2=A0=C2=A0others, therefore it MUST continue sending =
RREQ-DIO to reach other</span></p><p dir=3D"ltr" style=3D"line-height:1.38;=
margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:norma=
l;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wr=
ap">=C2=A0=C2=A0targets.=C2=A0 In this case, before rebroadcasting the RREQ=
-DIO</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The use of =
the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is this =E2=80=9Cbro=
adcast=E2=80=9D in the RF</span></p><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">sense? Again, this is a place a clear description of the network envi=
ronment</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;m=
argin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">might have h=
elped.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">[v11] Page 16, rebroadcasting changed to transmitting, new text s=
tates: =E2=80=9C</span><span style=3D"color:rgb(0,0,255);font-variant-numer=
ic:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spac=
e:pre-wrap"> If the OrigNode tries to reach multiple TargNodes in a single =
RREQ-</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;mar=
gin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:norm=
al;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-w=
rap">=C2=A0=C2=A0=C2=A0Instance, one of the TargNodes can be an intermediat=
e router to the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-nu=
meric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-s=
pace:pre-wrap">=C2=A0=C2=A0=C2=A0others, therefore it MUST continue sending=
 RREQ-DIO to reach other</span></p><p dir=3D"ltr" style=3D"line-height:1.38=
;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-v=
ariant-numeric:normal;font-variant-east-asian:normal;vertical-align:baselin=
e;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0targets.=C2=A0 In this case, befo=
re transmitting the RREQ-DIO via link-</span></p><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0=
,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical=
-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0local multicast, a =
TargNode MUST delete the Target Option</span></p><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0=
,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical=
-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0encapsulating its o=
wn address, so that downstream routers with higher</span></p><p dir=3D"ltr"=
 style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D=
"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:nor=
mal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Rank va=
lues do not try to create a route to this TargNode.</span><span style=3D"co=
lor:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal=
;vertical-align:baseline;white-space:pre-wrap">=E2=80=9D</span></p><br><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">17. Section 6.2.2:</span></p><br><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0send out any RREQ-D=
IO.=C2=A0 For the purposes of determining the</span></p><p dir=3D"ltr" styl=
e=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font=
-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:basel=
ine;white-space:pre-wrap">=C2=A0=C2=A0intersection with previous incoming R=
REQ-DIOs, the intermediate</span></p><p dir=3D"ltr" style=3D"line-height:1.=
38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:no=
rmal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre=
-wrap">=C2=A0=C2=A0router maintains a record of the targets that have been =
requested</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant=
-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0associated with the RREQ-Instance.=C2=A0 Any RREQ-DIO message with</span=
></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:=
0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:nor=
mal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0different ART=
 Options coming from a router with higher Rank is</span></p><p dir=3D"ltr" =
style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">=C2=A0=C2=A0ignored.</span></p><br><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">It=E2=80=99s not clear to me if the last=
 sentence goes with the previous and if so,</span></p><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">how. Does it even relate to multiple targets? Also=
, different from what? If it</span></p><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">has the same ART Options (same as what?) is it *not* ignored?</spa=
n></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bo=
ttom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">[=
v11] Page 16, new text: =E2=80=9C ...</span><span style=3D"color:rgb(0,0,25=
5);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-alig=
n:baseline;white-space:pre-wrap">If the intersection is empty, it</span></p=
><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"=
><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant=
-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0=C2=A0means that all the targets have been reached, and the router MUST =
NOT</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margi=
n-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p">=C2=A0=C2=A0=C2=A0transmit any RREQ-DIO.=C2=A0 For the purposes of deter=
mining the</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0p=
t;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric=
:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:=
pre-wrap">=C2=A0=C2=A0=C2=A0intersection with previous incoming RREQ-DIOs, =
the intermediate</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-=
top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-n=
umeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-=
space:pre-wrap">=C2=A0=C2=A0=C2=A0router maintains a record of the targets =
that have been requested for</span></p><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);fo=
nt-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:bas=
eline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0a given RREQ-Instance.=C2=A0 =
Any incoming RREQ-DIO message having multiple</span></p><p dir=3D"ltr" styl=
e=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"colo=
r:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;v=
ertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0ART Options =
coming from a router with higher Rank than the Rank of</span></p><p dir=3D"=
ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0the=
 stored targets is ignored.</span><span style=3D"color:rgb(0,0,255);font-va=
riant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline=
;white-space:pre-wrap">=E2=80=9D</span></p><br><p dir=3D"ltr" style=3D"line=
-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-=
numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white=
-space:pre-wrap">18. Section 6.3.1:</span></p><br><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">=C2=A0=C2=A0implementation-specific and out of scope.=
=C2=A0 If the implementation</span></p><p dir=3D"ltr" style=3D"line-height:=
1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">=C2=A0=C2=A0selects the symmetric route, and the L bit is not 0, t=
he TargNode MAY</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0=C2=A0delay transmitting the RREP-DIO for duration RREP_WAIT_TIME to awa=
it</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0a sym=
metric route with a lower Rank.=C2=A0 The value of RREP_WAIT_TIME is</span>=
</p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0=
pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:norm=
al;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0set by default=
 to 1/4 of the time duration determined by the L bit.</span></p><br><p dir=
=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span =
style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertica=
l-align:baseline;white-space:pre-wrap">It=E2=80=99s not an L bit though, it=
=E2=80=99s an L field.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.=
38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font=
-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:basel=
ine;white-space:pre-wrap">[v11] L bit was changed to L field in the documen=
t</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;mar=
gin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-eas=
t-asian:normal;vertical-align:baseline;white-space:pre-wrap">19. Section 6.=
3.2:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=
=A0multicast until the OrigNode is reached or MaxRank is exceeded.=C2=A0 Th=
e</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-=
bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0TargNo=
de MAY delay transmitting the RREP-DIO for duration</span></p><p dir=3D"ltr=
" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">=C2=A0=C2=A0RREP_WAIT_TIME to await a rou=
te with a lower Rank.=C2=A0 The value of</span></p><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">=C2=A0=C2=A0RREP_WAIT_TIME is set by default to 1/4 of=
 the time duration</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margi=
n-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
=C2=A0=C2=A0determined by the L bit.</span></p><br><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">Again, it=E2=80=99s an L field. Also, what if L is zer=
o? Is RREP_WAIT_TIME set to</span></p><p dir=3D"ltr" style=3D"line-height:1=
.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:n=
ormal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pr=
e-wrap">infinity, as the text implies?</span></p><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">Please do a global search for =E2=80=9CL bit=E2=80=
=9D, as there are additional instances I</span></p><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">haven=E2=80=99t called out.</span></p><br><p dir=3D"lt=
r" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">[v11] L bit was change=
d to L field in the document</span></p><br><p dir=3D"ltr" style=3D"line-hei=
ght:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-nume=
ric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spa=
ce:pre-wrap">20. Section 6.4:</span></p><br><p dir=3D"ltr" style=3D"line-he=
ight:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-num=
eric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-sp=
ace:pre-wrap">=C2=A0=C2=A0Step 4:</span></p><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant=
-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whit=
e-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If the receiver is th=
e OrigNode, it can start transmitting the</span></p><p dir=3D"ltr" style=3D=
"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-var=
iant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;=
white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0application data =
to TargNode along the path as provided in RREP-</span></p><p dir=3D"ltr" st=
yle=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"fo=
nt-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:bas=
eline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Instance, a=
nd processing for the RREP-DIO is complete.=C2=A0 Otherwise,</span></p><p d=
ir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><spa=
n style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;verti=
cal-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0in case of an asymmetric route, the intermediate router MUST</span></p><=
p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><=
span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0include the address of the interface receiving the RREP-DIO into</spa=
n></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom=
:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:no=
rmal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0the address vector, and then transmit the RREP-DIO via link-loc=
al</span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin=
-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0multicast.=C2=A0 In case of a symmetric route, the RRE=
P-DIO message is</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;mar=
gin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;f=
ont-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"=
>As with #15: on what interface(s)?</span></p><br><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap"><font color=3D"#741b47">[v11] Page 19,=C2=A0 Step 4 fir=
st paragraph remains the same,</font></span></p><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant=
-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whit=
e-space:pre-wrap"><font color=3D"#741b47">Charlie made a question: =E2=80=
=9C Are we assuming a single interface?=E2=80=9D</font></span></p><p dir=3D=
"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span sty=
le=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-a=
lign:baseline;white-space:pre-wrap"><font color=3D"#741b47">---------------=
-------------------------------------------------------</font></span></p><p=
 dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><s=
pan style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;ver=
tical-align:baseline;white-space:pre-wrap"><font color=3D"#741b47">RESPONSE=
 to Comment 20:</font></span></p><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal=
;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wra=
p"><font color=3D"#741b47">------------------------------------------------=
----------------------</font></span></p><font color=3D"#741b47"><br></font>=
<p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt">=
<span style=3D"font-variant-numeric:normal;font-variant-east-asian:normal;v=
ertical-align:baseline;white-space:pre-wrap"><font color=3D"#741b47">AODV-R=
PL routers can have multiple router interfaces.=C2=A0 Per-node</font></span=
></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:=
0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:nor=
mal;vertical-align:baseline;white-space:pre-wrap"><font color=3D"#741b47">c=
onfiguration of &quot;RREP-DIO transmission interfaces&quot; is an administ=
rative</font></span></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top=
:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-var=
iant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><font =
color=3D"#741b47">feature which is beyond the scope of the document.</font>=
</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;marg=
in-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">21. Section 10:=
</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;marg=
in-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0fak=
e AODV-RPL route discoveries.=C2=A0 In this type of scenario, RPL&#39;s</sp=
an></p><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-botto=
m:0pt"><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0preinstalle=
d mode of operation, where the key to use for a P2P-RPL</span></p><p dir=3D=
"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span sty=
le=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-a=
lign:baseline;white-space:pre-wrap">=C2=A0=C2=A0route discovery is preinsta=
lled, SHOULD be used.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.3=
8;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">What type of scenario is that?</span></p><br><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb=
(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">[V11] Page 22, new text: </span><sp=
an style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-eas=
t-asian:normal;vertical-align:baseline;white-space:pre-wrap">When rogue rou=
ters might be=C2=A0 present, RPL&#39;s preinstalled mode of operation, wher=
e the key to use=C2=A0 for route discovery is preinstalled, SHOULD be used.=
</span></p><br><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">22. Appendi=
x A:</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;=
margin-bottom:0pt"><span style=3D"font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">s/pakcet/pa=
cket/</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt=
;margin-bottom:0pt"><span style=3D"color:rgb(0,0,255);font-variant-numeric:=
normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:p=
re-wrap">[V11] Page 25, fixed.=C2=A0</span></p><br><p dir=3D"ltr" style=3D"=
line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">23. General remark:</span></p><br><p dir=3D"ltr" style=
=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"font-=
variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseli=
ne;white-space:pre-wrap">Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=
=80=99t a required section I was a little surprised</span></p><p dir=3D"ltr=
" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">not to encounter it, as it=E2=80=99s usua=
lly present. Your call of course.</span></p><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,=
0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-=
align:baseline;white-space:pre-wrap">[v11] Added</span></p></font></span><b=
r></div><div><br></div><div>Thank you very much,</div><div><br></div><div>I=
nes.=C2=A0</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Fri, May 7, 2021 at 4:58 AM Charlie Perkins &lt;<a href=
=3D"mailto:charles.perkins@earthlink.net" target=3D"_blank">charles.perkins=
@earthlink.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">Hello John,<br>
<br>
It&#39;s taken a while for me to get to this, please excuse the delay. I <b=
r>
have some followup to your comments interspersed below.<br>
<br>
On 4/19/2021 1:31 PM, John Scudder via Datatracker wrote:<br>
&gt; John Scudder has entered the following ballot position for<br>
&gt; draft-ietf-roll-aodv-rpl-10: Discuss<br>
&gt;<br>
&gt; When responding, please keep the subject line intact and reply to all<=
br>
&gt; email addresses included in the To and CC lines. (Feel free to cut thi=
s<br>
&gt; introductory paragraph, however.)<br>
&gt;<br>
&gt;<br>
&gt; Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss=
-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/i=
esg/statement/discuss-criteria.html</a><br>
&gt; for more information about DISCUSS and COMMENT positions.<br>
&gt;<br>
&gt;<br>
&gt; The document, along with other ballot positions, can be found here:<br=
>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-roll-aodv-rpl/"=
 rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draf=
t-ietf-roll-aodv-rpl/</a><br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; DISCUSS:<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt;<br>
&gt; A lot of effort has clearly gone into this work, thank you. I do have =
one topic<br>
&gt; I want to DISCUSS, as it seriously impacted the readability of the doc=
ument<br>
&gt; from my point of view. I don=E2=80=99t anticipate that it will be very=
 difficult to<br>
&gt; resolve this DISCUSS as it relates to clarity and not to anything fund=
amental.<br>
&gt;<br>
&gt; My chief difficulty with the document is placing it in context. No hin=
ts are<br>
&gt; given to the reader as to what the expected network environment is. I =
think it<br>
&gt; would be almost sufficient to say, for example =E2=80=9Cthe network en=
vironment is<br>
&gt; assumed to be the same as described in RFC 6550, Section 1=E2=80=9D fo=
r example, but<br>
&gt; without that hint and without a strong background in ROLL, I found mys=
elf<br>
&gt; struggling. Figures 4 and 5 in particular lead me to believe the expec=
ted<br>
&gt; environment looks similar to a classic ISP network =E2=80=94 a collect=
ion of nodes<br>
&gt; connected by point-to-point links. If this isn=E2=80=99t correct (and =
I bet it=E2=80=99s not)<br>
&gt; that may have led me into incorrect assumptions, which may be reflecte=
d in my<br>
&gt; other comments below.<br>
&gt;<br>
&gt; Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended=
 to stand alone<br>
&gt; as its own routing protocol, or to be viewed as an extension of RPL. I=
n the<br>
&gt; former case, it seems the document is lacking details that are present=
 in RFC<br>
&gt; 6550. I=E2=80=99m assuming the latter is the case, but a clear stateme=
nt to that effect<br>
&gt; seems indicated.<br>
How about this text:<br>
=C2=A0=C2=A0=C2=A0 Routing Protocol for Low-Power and Lossy Networks (RPL) =
[RFC6550] is<br>
=C2=A0=C2=A0=C2=A0 an IPv6 distance vector routing protocol designed to sup=
port multiple<br>
=C2=A0=C2=A0=C2=A0 traffic flows through a root-based Destination-Oriented =
Directed<br>
=C2=A0=C2=A0=C2=A0 Acyclic Graph (DODAG).=C2=A0 Typically, a router does no=
t have routing<br>
=C2=A0=C2=A0=C2=A0 information for most other routers.=C2=A0 Consequently, =
for traffic<br>
=C2=A0=C2=A0=C2=A0 between routers within the DODAG (i.e., Point-to-Point (=
P2P) traffic)<br>
=C2=A0=C2=A0=C2=A0 data packets either have to traverse the root in non-sto=
ring mode, or<br>
=C2=A0=C2=A0=C2=A0 traverse a common ancestor in storing mode.=C2=A0 Such P=
2P traffic is<br>
=C2=A0=C2=A0=C2=A0 thereby likely to traverse longer routes and may suffer =
severe<br>
=C2=A0=C2=A0=C2=A0 congestion near the root (for more information see [RFC6=
997],<br>
=C2=A0=C2=A0=C2=A0 [RFC6998]). The network environment that is considered i=
n this document<br>
=C2=A0=C2=A0=C2=A0 assumed to be the same as described in Section 1 of [RFC=
6550].<br>
<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; COMMENT:<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt;<br>
&gt; 1. Section 1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Reply.=C2=A0 AODV-RPL currently omits some features=
 compared to AODV -- in<br>
&gt;=C2=A0 =C2=A0 =C2=A0particular, flagging Route Errors, blacklisting uni=
directional links,<br>
&gt;=C2=A0 =C2=A0 =C2=A0multihoming, and handling unnumbered interfaces.<br=
>
&gt;<br>
&gt; Your use of language is entirely up to you, but I feel obliged to poin=
t out<br>
&gt; that there=E2=80=99s been a lot of discussion in the IETF community re=
cently about use<br>
&gt; of language that raises sensitive points, and about the term =E2=80=9C=
blacklisting=E2=80=9D in<br>
&gt; particular. I understand that this is the only place in the document t=
he term<br>
&gt; appears, and since it refers to AODV you can=E2=80=99t just use anothe=
r term, but<br>
&gt; placing it in quotation marks might make it clear that it=E2=80=99s re=
ferring verbatim<br>
&gt; to the language of RFC 3561.<br>
<br>
This is an evolving issue.=C2=A0 I am fine with using quotes but otherwise =
<br>
maintaining consistent terminology.=C2=A0 For instance,<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0 AODV-RPL currently omits some features compared to=
 AODV -- in<br>
=C2=A0=C2=A0=C2=A0=C2=A0 particular, flagging Route Errors, &quot;blacklist=
ing&quot; unidirectional links<br>
=C2=A0=C2=A0=C2=A0=C2=A0 [RFC3561], multihoming, and handling unnumbered in=
terfaces.<br>
<br>
If there is an official list of terms to search for please let us know.<br>
<br>
&gt;<br>
&gt; 2. Section 1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 support for storing and non-storing modes.=C2=A0 AODV add=
s basic messages<br>
&gt;=C2=A0 =C2=A0 RREQ and RREP as part of RPL DIO (DODAG Information Objec=
t) control<br>
&gt;<br>
&gt; Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?<br>
Yes, will fix.<br>
<br>
&gt;<br>
&gt; 3. Section 2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Symmetric route<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 The upstream and downstream routes traverse=
 the same routers.<br>
&gt;<br>
&gt; Same routers? Or same links? (Or both, if multi-access links are part =
of the<br>
&gt; mix, as I imagine they may be?)<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 The upstream and downstream routes tra=
verse the same routers and over<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the same links.<br>
&gt; 4. Section 4.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0OrigNode sets its IPv6 address in the DODAGID field=
 of the RREQ-DIO<br>
&gt;=C2=A0 =C2=A0 =C2=A0message.=C2=A0 A RREQ-DIO message MUST carry exactl=
y one RREQ option,<br>
&gt;<br>
&gt; Should that say =E2=80=9Cone of its IPv6 addresses&quot;? Is it even n=
ecessary to restate<br>
&gt; this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0DODAGID: 128-bit IPv6 address set by a DODAG root t=
hat uniquely<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0identifies a DODAG.=C2=A0 The =
DODAGID MUST be a routable IPv6<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address belonging to the DODAG=
 root.<br>
<br>
I&#39;m not quite sure what is requested.=C2=A0 Should it be &quot;OrigNode=
 sets the <br>
DODAGID field&quot;, relying on the definition provided in RFC 6550? Should=
 <br>
it be &quot;OrigNode sets one of its routable IPv6 address in the DODAGID f=
ield&quot;?<br>
Honestly, I thought the meaning was clear.=C2=A0 Unless there is an <br>
objection, I reckon we will use the latter wording.<br>
<br>
&gt;<br>
&gt; 5. Section S4.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 TargNode can join the RREQ instance at a Rank whose integ=
er portion<br>
&gt;=C2=A0 =C2=A0 is equal to the MaxRank.<br>
&gt;<br>
&gt; Not less than or equal, right? Strict equality to MaxRank is required?=
<br>
The existing text isn&#39;t good.=C2=A0 Instead,<br>
<br>
=C2=A0=C2=A0=C2=A0 TargNode can join the RREQ instance at a Rank whose inte=
ger portion<br>
=C2=A0=C2=A0=C2=A0 is less than the MaxRank.<br>
<br>
<br>
&gt; 6. Section 4.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0TargNode sets its IPv6 address in the DODAGID field=
 of the RREP-DIO<br>
&gt;=C2=A0 =C2=A0 =C2=A0message.=C2=A0 A RREP-DIO message MUST carry exactl=
y one RREP option,<br>
&gt;<br>
&gt; Same as #4.<br>
&gt;<br>
&gt; 7. Section 4.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Address Vector<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Only present when the H bit is set to 0.=C2=
=A0 For an asymmetric route,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the Address Vector represents the IPv6 addre=
sses of the route that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the RREP-DIO has passed.<br>
&gt;<br>
&gt; The first time I read through this, I didn=E2=80=99t understand it at =
all. On<br>
&gt; re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=
=9D in two different ways in the<br>
&gt; same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the s=
ense of an object in the<br>
&gt; protocol, the second time in the more casual sense of =E2=80=9Ca path =
through the<br>
&gt; network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the sec=
ond instance, as in =E2=80=9C=E2=80=A6<br>
&gt; represents the IPv6 addresses of the path through the network the RREP=
-DIO has<br>
&gt; traversed.=E2=80=9D<br>
&gt;<br>
&gt; Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=
=E2=80=99t any<br>
&gt; given node have various IPv6 addresses? So maybe just lose the definit=
e<br>
&gt; article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the pat=
h=E2=80=A6=E2=80=9D?<br>
<br>
Good point.=C2=A0 We will use your formulation.<br>
<br>
&gt;<br>
&gt; 8. Section 4.3:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 r<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0A one-bit reserved field.=C2=A0 This field M=
UST be initialized to zero<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0by the sender and MUST be ignored by the rec=
eiver.<br>
&gt;<br>
&gt; The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume=
 the field labeled =E2=80=9CX=E2=80=9D should be<br>
&gt; relabeled as =E2=80=9Cr=E2=80=9D?<br>
Actually, the description should refer to an &quot;X&quot; field, not an &q=
uot;r&quot; <br>
field.=C2=A0 We will update.<br>
<br>
<br>
&gt;<br>
&gt; 9. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Figure 4.=C2=A0 If an intermediate router sends out=
 RREQ-DIO with the S<br>
&gt;=C2=A0 =C2=A0 =C2=A0bit set to 1, then all the one-hop links on the rou=
te from the<br>
&gt;=C2=A0 =C2=A0 =C2=A0OrigNode O to this router meet the requirements of =
route discovery,<br>
&gt;<br>
&gt; On first reading I didn=E2=80=99t understand this. Having read the who=
le document, I<br>
&gt; now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=
=80=9Chave met=E2=80=9D would have been<br>
&gt; enough to get me past my initial befuddlement.<br>
<br>
Yes, that&#39;s better.<br>
<br>
&gt;<br>
&gt; 10. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The criteria used to determine whether or not each =
link is symmetric<br>
&gt;=C2=A0 =C2=A0 =C2=A0is beyond the scope of the document.=C2=A0 For inst=
ance, intermediate<br>
&gt;<br>
&gt; Should be =E2=80=9Ccriterion =E2=80=A6 is beyond&quot;, or &quot;crite=
ria =E2=80=A6 are beyond&quot;, depending on<br>
&gt; whether you want singular or plural.<br>
We will use &quot;criteria =E2=80=A6 are beyond&quot;.<br>
<br>
&gt;<br>
&gt; 11. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 routers can use local information (e.g., bit rate, bandwi=
dth, number<br>
&gt;=C2=A0 =C2=A0 of cells used in 6tisch)<br>
&gt;<br>
&gt; I wouldn=E2=80=99t have minded a reference for 6tisch.<br>
No problem.<br>
<br>
&gt;<br>
&gt; 12. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Upon receiving a RREQ-DIO with the S bit set to 1, =
a node determines<br>
&gt;=C2=A0 =C2=A0 =C2=A0whether this one-hop link can be used symmetrically=
, i.e., both the<br>
&gt;=C2=A0 =C2=A0 =C2=A0two directions meet the requirements of data transm=
ission.=C2=A0 If the<br>
&gt;=C2=A0 =C2=A0 =C2=A0RREQ-DIO arrives over an interface that is not know=
n to be symmetric,<br>
&gt;=C2=A0 =C2=A0 =C2=A0or is known to be asymmetric, the S bit is set to 0=
.=C2=A0 If the S bit<br>
&gt;=C2=A0 =C2=A0 =C2=A0arrives already set to be &#39;0&#39;, it is set to=
 be &#39;0&#39; on retransmission<br>
&gt;<br>
&gt; The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess =
you mean something like<br>
&gt; =E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.<br>
That is better.=C2=A0 We will use that.<br>
<br>
&gt;<br>
&gt; 13. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Appendix A describes an example method using the upstream=
 Expected<br>
&gt;=C2=A0 =C2=A0 Number of Transmissions&quot; (ETX) and downstream Receiv=
ed Signal<br>
&gt;=C2=A0 =C2=A0 Strength Indicator (RSSI) to estimate whether the link is=
 symmetric<br>
&gt;=C2=A0 =C2=A0 in terms of link quality is given in using an averaging t=
echnique.<br>
&gt;<br>
&gt; This sentence needs a rewrite to make it grammatical. It works up unti=
l &quot;is<br>
&gt; given in using an averaging technique=E2=80=9D.<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Appendix A describes an example method using the u=
pstream Expected<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Number of Transmissions&quot; (ETX) and downstream=
 Received Signal<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Strength Indicator (RSSI) to estimate whether the =
link is symmetric<br>
=C2=A0=C2=A0=C2=A0=C2=A0 in terms of link quality using an averaging techni=
que.<br>
<br>
<br>
&gt;<br>
&gt; 14. Section 6.2.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0If the S bit in the received RREQ-DIO is set=
 to 1, the router MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0determine whether each direction of the link=
 (by which the RREQ-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0DIO is received) satisfies the Objective Fun=
ction.=C2=A0 In case that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the downward (i.e. towards the TargNode) dir=
ection of the link<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0does not satisfy the Objective Function, the=
 link can&#39;t be used<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0symmetrically, thus the S bit of the RREQ-DI=
O to be sent out MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0be set as 0.=C2=A0 If the S bit in the recei=
ved RREQ-DIO is set to 0,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the router MUST determine into the upward di=
rection (towards the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0OrigNode) of the link.<br>
&gt;<br>
&gt; The last sentence doesn=E2=80=99t make sense.<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 ...=C2=A0 If the S bit in the received RREQ-DIO is set to 0=
,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the router MUST determine the upward directi=
on (towards the<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 OrigNode) of the link.<br>
&gt;<br>
&gt; 15. Section 6.2.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0If the router is an intermediate router, the=
n it transmits a RREQ-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0DIO via link-local multicast;<br>
&gt;<br>
&gt; On what interface? Routers generally can have multiple interfaces. Aga=
in, this<br>
&gt; is a place a clear description of the network environment might have h=
elped.<br>
<br>
The link-local multicast should go out over all local interfaces.<br>
<br>
&gt;<br>
&gt; 16. Section 6.2.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 If the OrigNode tries to reach multiple TargNodes in a si=
ngle RREQ-<br>
&gt;=C2=A0 =C2=A0 Instance, one of the TargNodes can be an intermediate rou=
ter to the<br>
&gt;=C2=A0 =C2=A0 others, therefore it MUST continue sending RREQ-DIO to re=
ach other<br>
&gt;=C2=A0 =C2=A0 targets.=C2=A0 In this case, before rebroadcasting the RR=
EQ-DIO<br>
&gt;<br>
&gt; The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is t=
his =E2=80=9Cbroadcast=E2=80=9D in the RF<br>
&gt; sense? Again, this is a place a clear description of the network envir=
onment<br>
&gt; might have helped.<br>
This needs to be reformulated to avoid suggesting anything about RF <br>
broadcast.=C2=A0 TBD.<br>
<br>
&gt;<br>
&gt; 17. Section 6.2.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 send out any RREQ-DIO.=C2=A0 For the purposes of determin=
ing the<br>
&gt;=C2=A0 =C2=A0 intersection with previous incoming RREQ-DIOs, the interm=
ediate<br>
&gt;=C2=A0 =C2=A0 router maintains a record of the targets that have been r=
equested<br>
&gt;=C2=A0 =C2=A0 associated with the RREQ-Instance.=C2=A0 Any RREQ-DIO mes=
sage with<br>
&gt;=C2=A0 =C2=A0 different ART Options coming from a router with higher Ra=
nk is<br>
&gt;=C2=A0 =C2=A0 ignored.<br>
&gt;<br>
&gt; It=E2=80=99s not clear to me if the last sentence goes with the previo=
us and if so,<br>
&gt; how. Does it even relate to multiple targets? Also, different from wha=
t? If it<br>
&gt; has the same ART Options (same as what?) is it *not* ignored?<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ..... =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 For the purposes of <br>
determining the<br>
=C2=A0=C2=A0 intersection with previous incoming RREQ-DIOs, the intermediat=
e<br>
=C2=A0=C2=A0 router maintains a record of the targets that have been reques=
ted<br>
=C2=A0=C2=A0 associated with the RREQ-Instance. Any incoming RREQ-DIO messa=
ge having<br>
=C2=A0=C2=A0 multiple ART Options coming from a router with higher Rank tha=
n the <br>
Rank of<br>
=C2=A0=C2=A0 the stored targets is ignored.<br>
<br>
&gt;<br>
&gt; 18. Section 6.3.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 implementation-specific and out of scope.=C2=A0 If the im=
plementation<br>
&gt;=C2=A0 =C2=A0 selects the symmetric route, and the L bit is not 0, the =
TargNode MAY<br>
&gt;=C2=A0 =C2=A0 delay transmitting the RREP-DIO for duration RREP_WAIT_TI=
ME to await<br>
&gt;=C2=A0 =C2=A0 a symmetric route with a lower Rank.=C2=A0 The value of R=
REP_WAIT_TIME is<br>
&gt;=C2=A0 =C2=A0 set by default to 1/4 of the time duration determined by =
the L bit.<br>
&gt;<br>
&gt; It=E2=80=99s not an L bit though, it=E2=80=99s an L field.<br>
Good point!<br>
<br>
&gt;<br>
&gt; 19. Section 6.3.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 multicast until the OrigNode is reached or MaxRank is exc=
eeded.=C2=A0 The<br>
&gt;=C2=A0 =C2=A0 TargNode MAY delay transmitting the RREP-DIO for duration=
<br>
&gt;=C2=A0 =C2=A0 RREP_WAIT_TIME to await a route with a lower Rank.=C2=A0 =
The value of<br>
&gt;=C2=A0 =C2=A0 RREP_WAIT_TIME is set by default to 1/4 of the time durat=
ion<br>
&gt;=C2=A0 =C2=A0 determined by the L bit.<br>
&gt;<br>
&gt; Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_=
TIME set to<br>
&gt; infinity, as the text implies?<br>
Thanks for pointing this out.=C2=A0 We need to be explicit about it.=C2=A0 =
I don&#39;t <br>
think the RREP_WAIT_TIME should ever be zero or infinity. But, if it <br>
were, the implementations would still be interoperable in a sense.=C2=A0 Do=
 <br>
we really want to get into exactly what wait times make sense in this <br>
context?<br>
<br>
<br>
&gt;<br>
&gt; Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are ad=
ditional instances I<br>
&gt; haven=E2=80=99t called out.<br>
&gt;<br>
&gt; 20. Section 6.4:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Step 4:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 If the receiver is the OrigNode, it can sta=
rt transmitting the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 application data to TargNode along the path=
 as provided in RREP-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Instance, and processing for the RREP-DIO i=
s complete.=C2=A0 Otherwise,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 in case of an asymmetric route, the interme=
diate router MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 include the address of the interface receiv=
ing the RREP-DIO into<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 the address vector, and then transmit the R=
REP-DIO via link-local<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 multicast.=C2=A0 In case of a symmetric rou=
te, the RREP-DIO message is<br>
&gt;<br>
&gt; As with #15: on what interface(s)?<br>
It should go out to all the neighbors over multiple interfaces if necessary=
.<br>
<br>
&gt;<br>
&gt; 21. Section 10:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 fake AODV-RPL route discoveries.=C2=A0 In this type of sc=
enario, RPL&#39;s<br>
&gt;=C2=A0 =C2=A0 preinstalled mode of operation, where the key to use for =
a P2P-RPL<br>
&gt;=C2=A0 =C2=A0 route discovery is preinstalled, SHOULD be used.<br>
&gt;<br>
&gt; What type of scenario is that?<br>
<br>
=C2=A0=C2=A0&quot;In this type of scenario&quot; -&gt; &quot;When rogue rou=
ters might be present&quot;<br>
<br>
&gt;<br>
&gt; 22. Appendix A:<br>
&gt;<br>
&gt; s/pakcet/packet/<br>
Check.<br>
&gt;<br>
&gt; 23. General remark:<br>
&gt;<br>
&gt; Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required s=
ection I was a little surprised<br>
&gt; not to encounter it, as it=E2=80=99s usually present. Your call of cou=
rse.<br>
Acknowledgements are due to a lot of people - thanks for the reminder!<br>
<br>
Naturally Yours,<br>
Charlie P.<br>
<br>
</blockquote></div>
</div>

--000000000000c18f0d05d00fa739--


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From: Ines  Robles <mariainesrobles@googlemail.com>
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Cc: John Scudder via Datatracker <noreply@ietf.org>,  Routing Over Low power and Lossy networks <roll@ietf.org>, The IESG <iesg@ietf.org>, roll-chairs <roll-chairs@ietf.org>,  "draft-ietf-roll-aodv-rpl@ietf.org" <draft-ietf-roll-aodv-rpl@ietf.org>,  Charlie Perkins <charles.perkins@earthlink.net>, Alvaro Retana <aretana.ietf@gmail.com>
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Subject: Re: [Roll] John Scudder's Discuss on draft-ietf-roll-aodv-rpl-10: (with DISCUSS and COMMENT)
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Hi John,

Many thanks for your prompt reply :-).  The week following IETF-112 is Ok.

Best wishes,
Ines.

On Fri, Nov 5, 2021 at 9:34 PM John Scudder <jgs@juniper.net> wrote:

> Hi Ines and all,
>
> Thanks for your patience. I hope it will be OK if I don=E2=80=99t review =
and reply
> in detail until the week following IETF-112? If it=E2=80=99s more urgent =
than that,
> let me know please.
>
> Thanks,
>
> =E2=80=94John
>
> On Nov 5, 2021, at 3:28 PM, Ines Robles <mariainesrobles@googlemail.com>
> wrote:
>
>
> [External Email. Be cautious of content]
>
>
> Hello John,
>
> Thank you for your comments to improve the document. We believe that v11
> addresses your DISCUSS points, please let us know.
>
> Please find comments below corresponding to version 11 in [v11]
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> A lot of effort has clearly gone into this work, thank you. I do have one
> topic
> I want to DISCUSS, as it seriously impacted the readability of the docume=
nt
> from my point of view. I don=E2=80=99t anticipate that it will be very di=
fficult to
> resolve this DISCUSS as it relates to clarity and not to anything
> fundamental.
>
> My chief difficulty with the document is placing it in context. No hints
> are
> given to the reader as to what the expected network environment is. I
> think it
> would be almost sufficient to say, for example =E2=80=9Cthe network envir=
onment is
> assumed to be the same as described in RFC 6550, Section 1=E2=80=9D for e=
xample,
> but
> without that hint and without a strong background in ROLL, I found myself
> struggling. Figures 4 and 5 in particular lead me to believe the expected
> environment looks similar to a classic ISP network =E2=80=94 a collection=
 of nodes
> connected by point-to-point links. If this isn=E2=80=99t correct (and I b=
et it=E2=80=99s
> not)
> that may have led me into incorrect assumptions, which may be reflected i=
n
> my
> other comments below.
>
> [v11] Page 3, new text: The network environment that is considered in thi=
s
>    document is assumed to be the same as described in Section 1 of
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/rfc655=
0*section-1__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg=
-FgUc84JZy79-H5mg$>
>    [RFC6550]
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/rfc655=
0*section-1__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg=
-FgUc84JZy79-H5mg$>
> .
>
>
> Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended to=
 stand
> alone
> as its own routing protocol, or to be viewed as an extension of RPL. In
> the
> former case, it seems the document is lacking details that are present in
> RFC
> 6550. I=E2=80=99m assuming the latter is the case, but a clear statement =
to that
> effect
> seems indicated.
>
> [v11] Page 3, new text: AODV-RPL reuses and extends the core RPL
> functionality to support
>    routes with bidirectional asymmetric links
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> 1. Section 1:
>
>    Reply.  AODV-RPL currently omits some features compared to AODV -- in
>    particular, flagging Route Errors, blacklisting unidirectional links,
>    multihoming, and handling unnumbered interfaces.
>
> Your use of language is entirely up to you, but I feel obliged to point o=
ut
> that there=E2=80=99s been a lot of discussion in the IETF community recen=
tly about
> use
> of language that raises sensitive points, and about the term
> =E2=80=9Cblacklisting=E2=80=9D in
> particular. I understand that this is the only place in the document the
> term
> appears, and since it refers to AODV you can=E2=80=99t just use another t=
erm, but
> placing it in quotation marks might make it clear that it=E2=80=99s refer=
ring
> verbatim
> to the language of RFC 3561.
>
> [v11] (Page 3), new text:  AODV-RPL currently omits some features
> compared to AODV -- in
>    particular, flagging Route Errors, "blacklisting" unidirectional
>    links ([RFC3561
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/rfc356=
1__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZwou=
iSuEQ$>]),
> multihoming, and handling unnumbered interfaces.
>
>
> 2. Section 1:
>
>   support for storing and non-storing modes.  AODV adds basic messages
>   RREQ and RREP as part of RPL DIO (DODAG Information Object) control
>
> Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?
>
>
> [v11] Page 3: It was changed to AODV-RPL adds basic messages
>
>
> 3. Section 2:
>
>    Symmetric route
>       The upstream and downstream routes traverse the same routers.
>
> Same routers? Or same links? (Or both, if multi-access links are part of
> the
> mix, as I imagine they may be?)
>
> [v11] Page 5, new text: Symmetric route: The upstream and downstream
> routes traverse the same routers and
>       over the same links.
>
>
> 4. Section 4.1:
>
>    OrigNode sets its IPv6 address in the DODAGID field of the RREQ-DIO
>    message.  A RREQ-DIO message MUST carry exactly one RREQ option,
>
> Should that say =E2=80=9Cone of its IPv6 addresses"? Is it even necessary=
 to
> restate
> this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:
>
>    DODAGID: 128-bit IPv6 address set by a DODAG root that uniquely
>          identifies a DODAG.  The DODAGID MUST be a routable IPv6
>          address belonging to the DODAG root.
>
> [v11] Page 6-New text: OrigNode selects one of its IPv6 addresses and
> sets it in the DODAGID
>    field of the RREQ-DIO message.
>
>
> 5. Section S4.1:
>
>   TargNode can join the RREQ instance at a Rank whose integer portion
>   is equal to the MaxRank.
>
> Not less than or equal, right? Strict equality to MaxRank is required?
>
> [v11] Page 8, new text: TargNode can join the RREQ instance at a Rank
> whose integer portion
>    is less than or equal to the MaxRank.
>
>
> 6. Section 4.2:
>
>    TargNode sets its IPv6 address in the DODAGID field of the RREP-DIO
>    message.  A RREP-DIO message MUST carry exactly one RREP option,
>
> Same as #4.
>
> [v11] Page 8, new text: TargNode sets one of its IPv6 addresses in the
> DODAGID field of the
>    RREP-DIO message.
>
>
> 7. Section 4.2:
>
>   Address Vector
>      Only present when the H bit is set to 0.  For an asymmetric route,
>      the Address Vector represents the IPv6 addresses of the route that
>      the RREP-DIO has passed.
>
> The first time I read through this, I didn=E2=80=99t understand it at all=
. On
> re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=9D=
 in two different ways in
> the
> same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the sens=
e of an object in
> the
> protocol, the second time in the more casual sense of =E2=80=9Ca path thr=
ough the
> network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the second=
 instance, as in
> =E2=80=9C=E2=80=A6
> represents the IPv6 addresses of the path through the network the RREP-DI=
O
> has
> Traversed.=E2=80=9D
>
> [v11] Page 10, new text: Address Vector
>       Only present when the H bit is set to 0.  For an asymmetric route,
>       the Address Vector represents the IPv6 addresses of the path
>       through the network the RREP-DIO has passed.
>
> Passed was not changed to Traversed.
>
>
> Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=E2=
=80=99t any
> given node have various IPv6 addresses? So maybe just lose the definite
> article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the path=
=E2=80=A6=E2=80=9D?
>
> 8. Section 4.3:
>
>   r
>      A one-bit reserved field.  This field MUST be initialized to zero
>      by the sender and MUST be ignored by the receiver.
>
> The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume th=
e field labeled =E2=80=9CX=E2=80=9D
> should be
> relabeled as =E2=80=9Cr=E2=80=9D?
>
> [v11] Page 11: changed to X.
>
> 9. Section 5:
>
>    Figure 4.  If an intermediate router sends out RREQ-DIO with the S
>    bit set to 1, then all the one-hop links on the route from the
>    OrigNode O to this router meet the requirements of route discovery,
>
> On first reading I didn=E2=80=99t understand this. Having read the whole =
document,
> I
> now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=80=
=9Chave met=E2=80=9D would have
> been
> enough to get me past my initial befuddlement.
>
> [v11] Page 11: changed to =E2=80=9Chas met=E2=80=9D
>
> 10. Section 5:
>
>    The criteria used to determine whether or not each link is symmetric
>    is beyond the scope of the document.  For instance, intermediate
>
> Should be =E2=80=9Ccriterion =E2=80=A6 is beyond", or "criteria =E2=80=A6=
 are beyond", depending on
> whether you want singular or plural.
>
> [v11] Page12, Not Corrected. [Can this be addressed by the RFC Editor?]
>
>
> 11. Section 5:
>
>   routers can use local information (e.g., bit rate, bandwidth, number
>   of cells used in 6tisch)
>
> I wouldn=E2=80=99t have minded a reference for 6tisch.
>
> [v11]Page 12, reference added, new text: ...cells used in 6tisch [RFC9030
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/rfc903=
0__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZzNb=
2CTyA$>
> ])...
>
>
> 12. Section 5:
>
>    Upon receiving a RREQ-DIO with the S bit set to 1, a node determines
>    whether this one-hop link can be used symmetrically, i.e., both the
>    two directions meet the requirements of data transmission.  If the
>    RREQ-DIO arrives over an interface that is not known to be symmetric,
>    or is known to be asymmetric, the S bit is set to 0.  If the S bit
>    arrives already set to be '0', it is set to be '0' on retransmission
>
> The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess you=
 mean something
> like
> =E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.
>
> [v11] Page 12, changed to propagated: ..when the RREQ-DIO is propagated.
>
> 13. Section 5:
>
>   Appendix A describes an example method using the upstream Expected
>   Number of Transmissions" (ETX) and downstream Received Signal
>   Strength Indicator (RSSI) to estimate whether the link is symmetric
>   in terms of link quality is given in using an averaging technique.
>
> This sentence needs a rewrite to make it grammatical. It works up until "=
is
> given in using an averaging technique=E2=80=9D.
>
> [v11] Page 13, new text: =E2=80=9C Appendix A
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-=
ietf-roll-aodv-rpl-11*appendix-A__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP=
-uCChnwCWuKE4nSeCB3Pg-FgUc84JZxX0Ve_6g$>
> describes an example method using the upstream Expected
>    Number of Transmissions (ETX) and downstream Received Signal Strength
>    Indicator (RSSI) to estimate whether the link is symmetric in terms
>    of link quality using an averaging technique.=E2=80=9D
>
> 14. Section 6.2.1:
>
>      If the S bit in the received RREQ-DIO is set to 1, the router MUST
>      determine whether each direction of the link (by which the RREQ-
>      DIO is received) satisfies the Objective Function.  In case that
>      the downward (i.e. towards the TargNode) direction of the link
>      does not satisfy the Objective Function, the link can't be used
>      symmetrically, thus the S bit of the RREQ-DIO to be sent out MUST
>      be set as 0.  If the S bit in the received RREQ-DIO is set to 0,
>      the router MUST determine into the upward direction (towards the
>      OrigNode) of the link.
>
> The last sentence doesn=E2=80=99t make sense.
>
> [v11] Page 14, Step 1 section was re-written, new text:=E2=80=9DStep 1:
>
>       The router MUST first determine whether to propagate the RREQ-DIO.
>       It does this by determining whether or not the downstream
>       direction of the incoming link satisfies the Objective Function
>       (OF).  If not the RREQ-DIO MUST be dropped, and the following
>       steps are not processed.  Otherwise, the router MUST join the
>       RREQ-Instance and prepare to propagate the RREQ-DIO.  The upstream
>       neighbor router that transmitted the received RREQ-DIO is selected
>       as the preferred parent.=E2=80=9D
>
> 15. Section 6.2.1:
>
>      If the router is an intermediate router, then it transmits a RREQ-
>      DIO via link-local multicast;
>
> On what interface? Routers generally can have multiple interfaces. Again,
> this
> is a place a clear description of the network environment might have
> helped.
>
> [v11] Page 15, Step 4 new text as follows: =E2=80=9CStep 4:
>
>       The router checks whether one of its addresses is included in one
>       of the ART Options.  If so, this router is one of the TargNodes.
>       Otherwise, it is an intermediate router.
>
>       If the router is an intermediate router, then it transmits the
>       RREQ-DIO via link-local multicast; if the H bit is set to 0, the
>       intermediate router MUST include the address of the interface
>       receiving the RREQ-DIO into the address vector.  Otherwise, the
>       router is TargNode; if it was not already associated with the
>       RREQ-Instance, it prepares and transmits a RREP-DIO (Section 6.3
> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-=
ietf-roll-aodv-rpl-11*section-6.3__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiE=
P-uCChnwCWuKE4nSeCB3Pg-FgUc84JZxWUDAY_A$>
> ).
>       If, on the other hand, TargNode was already associated with the
>       RREQ-Instance, it takes no further action and does not send an
>       RREP-DIO.=E2=80=9D
>
> 16. Section 6.2.2:
>
>   If the OrigNode tries to reach multiple TargNodes in a single RREQ-
>   Instance, one of the TargNodes can be an intermediate router to the
>   others, therefore it MUST continue sending RREQ-DIO to reach other
>   targets.  In this case, before rebroadcasting the RREQ-DIO
>
> The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is this=
 =E2=80=9Cbroadcast=E2=80=9D in
> the RF
> sense? Again, this is a place a clear description of the network
> environment
> might have helped.
>
> [v11] Page 16, rebroadcasting changed to transmitting, new text states: =
=E2=80=9C
> If the OrigNode tries to reach multiple TargNodes in a single RREQ-
>    Instance, one of the TargNodes can be an intermediate router to the
>    others, therefore it MUST continue sending RREQ-DIO to reach other
>    targets.  In this case, before transmitting the RREQ-DIO via link-
>    local multicast, a TargNode MUST delete the Target Option
>    encapsulating its own address, so that downstream routers with higher
>    Rank values do not try to create a route to this TargNode.=E2=80=9D
>
> 17. Section 6.2.2:
>
>   send out any RREQ-DIO.  For the purposes of determining the
>   intersection with previous incoming RREQ-DIOs, the intermediate
>   router maintains a record of the targets that have been requested
>   associated with the RREQ-Instance.  Any RREQ-DIO message with
>   different ART Options coming from a router with higher Rank is
>   ignored.
>
> It=E2=80=99s not clear to me if the last sentence goes with the previous =
and if so,
> how. Does it even relate to multiple targets? Also, different from what?
> If it
> has the same ART Options (same as what?) is it *not* ignored?
>
> [v11] Page 16, new text: =E2=80=9C ...If the intersection is empty, it
>    means that all the targets have been reached, and the router MUST NOT
>    transmit any RREQ-DIO.  For the purposes of determining the
>    intersection with previous incoming RREQ-DIOs, the intermediate
>    router maintains a record of the targets that have been requested for
>    a given RREQ-Instance.  Any incoming RREQ-DIO message having multiple
>    ART Options coming from a router with higher Rank than the Rank of
>    the stored targets is ignored.=E2=80=9D
>
> 18. Section 6.3.1:
>
>   implementation-specific and out of scope.  If the implementation
>   selects the symmetric route, and the L bit is not 0, the TargNode MAY
>   delay transmitting the RREP-DIO for duration RREP_WAIT_TIME to await
>   a symmetric route with a lower Rank.  The value of RREP_WAIT_TIME is
>   set by default to 1/4 of the time duration determined by the L bit.
>
> It=E2=80=99s not an L bit though, it=E2=80=99s an L field.
>
> [v11] L bit was changed to L field in the document
>
> 19. Section 6.3.2:
>
>   multicast until the OrigNode is reached or MaxRank is exceeded.  The
>   TargNode MAY delay transmitting the RREP-DIO for duration
>   RREP_WAIT_TIME to await a route with a lower Rank.  The value of
>   RREP_WAIT_TIME is set by default to 1/4 of the time duration
>   determined by the L bit.
>
> Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_TIM=
E set to
> infinity, as the text implies?
>
> Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are addit=
ional instances I
> haven=E2=80=99t called out.
>
> [v11] L bit was changed to L field in the document
>
> 20. Section 6.4:
>
>   Step 4:
>
>       If the receiver is the OrigNode, it can start transmitting the
>       application data to TargNode along the path as provided in RREP-
>       Instance, and processing for the RREP-DIO is complete.  Otherwise,
>       in case of an asymmetric route, the intermediate router MUST
>       include the address of the interface receiving the RREP-DIO into
>       the address vector, and then transmit the RREP-DIO via link-local
>       multicast.  In case of a symmetric route, the RREP-DIO message is
>
> As with #15: on what interface(s)?
>
> [v11] Page 19,  Step 4 first paragraph remains the same,
> Charlie made a question: =E2=80=9C Are we assuming a single interface?=E2=
=80=9D
> ----------------------------------------------------------------------
> RESPONSE to Comment 20:
> ----------------------------------------------------------------------
>
> AODV-RPL routers can have multiple router interfaces.  Per-node
> configuration of "RREP-DIO transmission interfaces" is an administrative
> feature which is beyond the scope of the document.
>
> 21. Section 10:
>
>   fake AODV-RPL route discoveries.  In this type of scenario, RPL's
>   preinstalled mode of operation, where the key to use for a P2P-RPL
>   route discovery is preinstalled, SHOULD be used.
>
> What type of scenario is that?
>
> [V11] Page 22, new text: When rogue routers might be  present, RPL's
> preinstalled mode of operation, where the key to use  for route discovery
> is preinstalled, SHOULD be used.
>
>
> 22. Appendix A:
>
> s/pakcet/packet/
>
> [V11] Page 25, fixed.
>
> 23. General remark:
>
> Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required sect=
ion I was a little
> surprised
> not to encounter it, as it=E2=80=99s usually present. Your call of course=
.
>
> [v11] Added
>
>
> Thank you very much,
>
> Ines.
>
> On Fri, May 7, 2021 at 4:58 AM Charlie Perkins <
> charles.perkins@earthlink.net> wrote:
>
>> Hello John,
>>
>> It's taken a while for me to get to this, please excuse the delay. I
>> have some followup to your comments interspersed below.
>>
>> On 4/19/2021 1:31 PM, John Scudder via Datatracker wrote:
>> > John Scudder has entered the following ballot position for
>> > draft-ietf-roll-aodv-rpl-10: Discuss
>> >
>> > When responding, please keep the subject line intact and reply to all
>> > email addresses included in the To and CC lines. (Feel free to cut thi=
s
>> > introductory paragraph, however.)
>> >
>> >
>> > Please refer to
>> https://www.ietf.org/iesg/statement/discuss-criteria.html
>> <https://urldefense.com/v3/__https://www.ietf.org/iesg/statement/discuss=
-criteria.html__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3P=
g-FgUc84JZzWjkQ5DQ$>
>> > for more information about DISCUSS and COMMENT positions.
>> >
>> >
>> > The document, along with other ballot positions, can be found here:
>> > https://datatracker.ietf.org/doc/draft-ietf-roll-aodv-rpl/
>> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-ietf=
-roll-aodv-rpl/__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3=
Pg-FgUc84JZzbGphdAw$>
>> >
>> >
>> >
>> > ----------------------------------------------------------------------
>> > DISCUSS:
>> > ----------------------------------------------------------------------
>> >
>> > A lot of effort has clearly gone into this work, thank you. I do have
>> one topic
>> > I want to DISCUSS, as it seriously impacted the readability of the
>> document
>> > from my point of view. I don=E2=80=99t anticipate that it will be very
>> difficult to
>> > resolve this DISCUSS as it relates to clarity and not to anything
>> fundamental.
>> >
>> > My chief difficulty with the document is placing it in context. No
>> hints are
>> > given to the reader as to what the expected network environment is. I
>> think it
>> > would be almost sufficient to say, for example =E2=80=9Cthe network en=
vironment
>> is
>> > assumed to be the same as described in RFC 6550, Section 1=E2=80=9D fo=
r
>> example, but
>> > without that hint and without a strong background in ROLL, I found
>> myself
>> > struggling. Figures 4 and 5 in particular lead me to believe the
>> expected
>> > environment looks similar to a classic ISP network =E2=80=94 a collect=
ion of
>> nodes
>> > connected by point-to-point links. If this isn=E2=80=99t correct (and =
I bet
>> it=E2=80=99s not)
>> > that may have led me into incorrect assumptions, which may be reflecte=
d
>> in my
>> > other comments below.
>> >
>> > Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended=
 to stand
>> alone
>> > as its own routing protocol, or to be viewed as an extension of RPL. I=
n
>> the
>> > former case, it seems the document is lacking details that are present
>> in RFC
>> > 6550. I=E2=80=99m assuming the latter is the case, but a clear stateme=
nt to
>> that effect
>> > seems indicated.
>> How about this text:
>>     Routing Protocol for Low-Power and Lossy Networks (RPL) [RFC6550] is
>>     an IPv6 distance vector routing protocol designed to support multipl=
e
>>     traffic flows through a root-based Destination-Oriented Directed
>>     Acyclic Graph (DODAG).  Typically, a router does not have routing
>>     information for most other routers.  Consequently, for traffic
>>     between routers within the DODAG (i.e., Point-to-Point (P2P) traffic=
)
>>     data packets either have to traverse the root in non-storing mode, o=
r
>>     traverse a common ancestor in storing mode.  Such P2P traffic is
>>     thereby likely to traverse longer routes and may suffer severe
>>     congestion near the root (for more information see [RFC6997],
>>     [RFC6998]). The network environment that is considered in this
>> document
>>     assumed to be the same as described in Section 1 of [RFC6550].
>>
>> > ----------------------------------------------------------------------
>> > COMMENT:
>> > ----------------------------------------------------------------------
>> >
>> > 1. Section 1:
>> >
>> >     Reply.  AODV-RPL currently omits some features compared to AODV --
>> in
>> >     particular, flagging Route Errors, blacklisting unidirectional
>> links,
>> >     multihoming, and handling unnumbered interfaces.
>> >
>> > Your use of language is entirely up to you, but I feel obliged to poin=
t
>> out
>> > that there=E2=80=99s been a lot of discussion in the IETF community re=
cently
>> about use
>> > of language that raises sensitive points, and about the term
>> =E2=80=9Cblacklisting=E2=80=9D in
>> > particular. I understand that this is the only place in the document
>> the term
>> > appears, and since it refers to AODV you can=E2=80=99t just use anothe=
r term,
>> but
>> > placing it in quotation marks might make it clear that it=E2=80=99s re=
ferring
>> verbatim
>> > to the language of RFC 3561.
>>
>> This is an evolving issue.  I am fine with using quotes but otherwise
>> maintaining consistent terminology.  For instance,
>>
>>      AODV-RPL currently omits some features compared to AODV -- in
>>      particular, flagging Route Errors, "blacklisting" unidirectional
>> links
>>      [RFC3561], multihoming, and handling unnumbered interfaces.
>>
>> If there is an official list of terms to search for please let us know.
>>
>> >
>> > 2. Section 1:
>> >
>> >    support for storing and non-storing modes.  AODV adds basic message=
s
>> >    RREQ and RREP as part of RPL DIO (DODAG Information Object) control
>> >
>> > Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?
>> Yes, will fix.
>>
>> >
>> > 3. Section 2:
>> >
>> >     Symmetric route
>> >        The upstream and downstream routes traverse the same routers.
>> >
>> > Same routers? Or same links? (Or both, if multi-access links are part
>> of the
>> > mix, as I imagine they may be?)
>>
>>        The upstream and downstream routes traverse the same routers and
>> over
>>        the same links.
>> > 4. Section 4.1:
>> >
>> >     OrigNode sets its IPv6 address in the DODAGID field of the RREQ-DI=
O
>> >     message.  A RREQ-DIO message MUST carry exactly one RREQ option,
>> >
>> > Should that say =E2=80=9Cone of its IPv6 addresses"? Is it even necess=
ary to
>> restate
>> > this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:
>> >
>> >     DODAGID: 128-bit IPv6 address set by a DODAG root that uniquely
>> >           identifies a DODAG.  The DODAGID MUST be a routable IPv6
>> >           address belonging to the DODAG root.
>>
>> I'm not quite sure what is requested.  Should it be "OrigNode sets the
>> DODAGID field", relying on the definition provided in RFC 6550? Should
>> it be "OrigNode sets one of its routable IPv6 address in the DODAGID
>> field"?
>> Honestly, I thought the meaning was clear.  Unless there is an
>> objection, I reckon we will use the latter wording.
>>
>> >
>> > 5. Section S4.1:
>> >
>> >    TargNode can join the RREQ instance at a Rank whose integer portion
>> >    is equal to the MaxRank.
>> >
>> > Not less than or equal, right? Strict equality to MaxRank is required?
>> The existing text isn't good.  Instead,
>>
>>     TargNode can join the RREQ instance at a Rank whose integer portion
>>     is less than the MaxRank.
>>
>>
>> > 6. Section 4.2:
>> >
>> >     TargNode sets its IPv6 address in the DODAGID field of the RREP-DI=
O
>> >     message.  A RREP-DIO message MUST carry exactly one RREP option,
>> >
>> > Same as #4.
>> >
>> > 7. Section 4.2:
>> >
>> >    Address Vector
>> >       Only present when the H bit is set to 0.  For an asymmetric rout=
e,
>> >       the Address Vector represents the IPv6 addresses of the route th=
at
>> >       the RREP-DIO has passed.
>> >
>> > The first time I read through this, I didn=E2=80=99t understand it at =
all. On
>> > re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=
=9D in two different ways
>> in the
>> > same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the s=
ense of an object
>> in the
>> > protocol, the second time in the more casual sense of =E2=80=9Ca path =
through
>> the
>> > network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the sec=
ond instance, as
>> in =E2=80=9C=E2=80=A6
>> > represents the IPv6 addresses of the path through the network the
>> RREP-DIO has
>> > traversed.=E2=80=9D
>> >
>> > Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=
=E2=80=99t
>> any
>> > given node have various IPv6 addresses? So maybe just lose the definit=
e
>> > article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the pat=
h=E2=80=A6=E2=80=9D?
>>
>> Good point.  We will use your formulation.
>>
>> >
>> > 8. Section 4.3:
>> >
>> >    r
>> >       A one-bit reserved field.  This field MUST be initialized to zer=
o
>> >       by the sender and MUST be ignored by the receiver.
>> >
>> > The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume=
 the field labeled =E2=80=9CX=E2=80=9D
>> should be
>> > relabeled as =E2=80=9Cr=E2=80=9D?
>> Actually, the description should refer to an "X" field, not an "r"
>> field.  We will update.
>>
>>
>> >
>> > 9. Section 5:
>> >
>> >     Figure 4.  If an intermediate router sends out RREQ-DIO with the S
>> >     bit set to 1, then all the one-hop links on the route from the
>> >     OrigNode O to this router meet the requirements of route discovery=
,
>> >
>> > On first reading I didn=E2=80=99t understand this. Having read the who=
le
>> document, I
>> > now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=
=80=9Chave met=E2=80=9D would
>> have been
>> > enough to get me past my initial befuddlement.
>>
>> Yes, that's better.
>>
>> >
>> > 10. Section 5:
>> >
>> >     The criteria used to determine whether or not each link is symmetr=
ic
>> >     is beyond the scope of the document.  For instance, intermediate
>> >
>> > Should be =E2=80=9Ccriterion =E2=80=A6 is beyond", or "criteria =E2=80=
=A6 are beyond",
>> depending on
>> > whether you want singular or plural.
>> We will use "criteria =E2=80=A6 are beyond".
>>
>> >
>> > 11. Section 5:
>> >
>> >    routers can use local information (e.g., bit rate, bandwidth, numbe=
r
>> >    of cells used in 6tisch)
>> >
>> > I wouldn=E2=80=99t have minded a reference for 6tisch.
>> No problem.
>>
>> >
>> > 12. Section 5:
>> >
>> >     Upon receiving a RREQ-DIO with the S bit set to 1, a node determin=
es
>> >     whether this one-hop link can be used symmetrically, i.e., both th=
e
>> >     two directions meet the requirements of data transmission.  If the
>> >     RREQ-DIO arrives over an interface that is not known to be
>> symmetric,
>> >     or is known to be asymmetric, the S bit is set to 0.  If the S bit
>> >     arrives already set to be '0', it is set to be '0' on retransmissi=
on
>> >
>> > The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess =
you mean
>> something like
>> > =E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.
>> That is better.  We will use that.
>>
>> >
>> > 13. Section 5:
>> >
>> >    Appendix A describes an example method using the upstream Expected
>> >    Number of Transmissions" (ETX) and downstream Received Signal
>> >    Strength Indicator (RSSI) to estimate whether the link is symmetric
>> >    in terms of link quality is given in using an averaging technique.
>> >
>> > This sentence needs a rewrite to make it grammatical. It works up unti=
l
>> "is
>> > given in using an averaging technique=E2=80=9D.
>> How about:
>>      Appendix A describes an example method using the upstream Expected
>>      Number of Transmissions" (ETX) and downstream Received Signal
>>      Strength Indicator (RSSI) to estimate whether the link is symmetric
>>      in terms of link quality using an averaging technique.
>>
>>
>> >
>> > 14. Section 6.2.1:
>> >
>> >       If the S bit in the received RREQ-DIO is set to 1, the router MU=
ST
>> >       determine whether each direction of the link (by which the RREQ-
>> >       DIO is received) satisfies the Objective Function.  In case that
>> >       the downward (i.e. towards the TargNode) direction of the link
>> >       does not satisfy the Objective Function, the link can't be used
>> >       symmetrically, thus the S bit of the RREQ-DIO to be sent out MUS=
T
>> >       be set as 0.  If the S bit in the received RREQ-DIO is set to 0,
>> >       the router MUST determine into the upward direction (towards the
>> >       OrigNode) of the link.
>> >
>> > The last sentence doesn=E2=80=99t make sense.
>> How about:
>>                 ...  If the S bit in the received RREQ-DIO is set to 0,
>>       the router MUST determine the upward direction (towards the
>>       OrigNode) of the link.
>> >
>> > 15. Section 6.2.1:
>> >
>> >       If the router is an intermediate router, then it transmits a RRE=
Q-
>> >       DIO via link-local multicast;
>> >
>> > On what interface? Routers generally can have multiple interfaces.
>> Again, this
>> > is a place a clear description of the network environment might have
>> helped.
>>
>> The link-local multicast should go out over all local interfaces.
>>
>> >
>> > 16. Section 6.2.2:
>> >
>> >    If the OrigNode tries to reach multiple TargNodes in a single RREQ-
>> >    Instance, one of the TargNodes can be an intermediate router to the
>> >    others, therefore it MUST continue sending RREQ-DIO to reach other
>> >    targets.  In this case, before rebroadcasting the RREQ-DIO
>> >
>> > The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is t=
his =E2=80=9Cbroadcast=E2=80=9D
>> in the RF
>> > sense? Again, this is a place a clear description of the network
>> environment
>> > might have helped.
>> This needs to be reformulated to avoid suggesting anything about RF
>> broadcast.  TBD.
>>
>> >
>> > 17. Section 6.2.2:
>> >
>> >    send out any RREQ-DIO.  For the purposes of determining the
>> >    intersection with previous incoming RREQ-DIOs, the intermediate
>> >    router maintains a record of the targets that have been requested
>> >    associated with the RREQ-Instance.  Any RREQ-DIO message with
>> >    different ART Options coming from a router with higher Rank is
>> >    ignored.
>> >
>> > It=E2=80=99s not clear to me if the last sentence goes with the previo=
us and if
>> so,
>> > how. Does it even relate to multiple targets? Also, different from
>> what? If it
>> > has the same ART Options (same as what?) is it *not* ignored?
>> How about:
>>                    .....                     For the purposes of
>> determining the
>>    intersection with previous incoming RREQ-DIOs, the intermediate
>>    router maintains a record of the targets that have been requested
>>    associated with the RREQ-Instance. Any incoming RREQ-DIO message havi=
ng
>>    multiple ART Options coming from a router with higher Rank than the
>> Rank of
>>    the stored targets is ignored.
>>
>> >
>> > 18. Section 6.3.1:
>> >
>> >    implementation-specific and out of scope.  If the implementation
>> >    selects the symmetric route, and the L bit is not 0, the TargNode M=
AY
>> >    delay transmitting the RREP-DIO for duration RREP_WAIT_TIME to awai=
t
>> >    a symmetric route with a lower Rank.  The value of RREP_WAIT_TIME i=
s
>> >    set by default to 1/4 of the time duration determined by the L bit.
>> >
>> > It=E2=80=99s not an L bit though, it=E2=80=99s an L field.
>> Good point!
>>
>> >
>> > 19. Section 6.3.2:
>> >
>> >    multicast until the OrigNode is reached or MaxRank is exceeded.  Th=
e
>> >    TargNode MAY delay transmitting the RREP-DIO for duration
>> >    RREP_WAIT_TIME to await a route with a lower Rank.  The value of
>> >    RREP_WAIT_TIME is set by default to 1/4 of the time duration
>> >    determined by the L bit.
>> >
>> > Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_=
TIME set
>> to
>> > infinity, as the text implies?
>> Thanks for pointing this out.  We need to be explicit about it.  I don't
>> think the RREP_WAIT_TIME should ever be zero or infinity. But, if it
>> were, the implementations would still be interoperable in a sense.  Do
>> we really want to get into exactly what wait times make sense in this
>> context?
>>
>>
>> >
>> > Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are ad=
ditional
>> instances I
>> > haven=E2=80=99t called out.
>> >
>> > 20. Section 6.4:
>> >
>> >    Step 4:
>> >
>> >        If the receiver is the OrigNode, it can start transmitting the
>> >        application data to TargNode along the path as provided in RREP=
-
>> >        Instance, and processing for the RREP-DIO is complete.
>> Otherwise,
>> >        in case of an asymmetric route, the intermediate router MUST
>> >        include the address of the interface receiving the RREP-DIO int=
o
>> >        the address vector, and then transmit the RREP-DIO via link-loc=
al
>> >        multicast.  In case of a symmetric route, the RREP-DIO message =
is
>> >
>> > As with #15: on what interface(s)?
>> It should go out to all the neighbors over multiple interfaces if
>> necessary.
>>
>> >
>> > 21. Section 10:
>> >
>> >    fake AODV-RPL route discoveries.  In this type of scenario, RPL's
>> >    preinstalled mode of operation, where the key to use for a P2P-RPL
>> >    route discovery is preinstalled, SHOULD be used.
>> >
>> > What type of scenario is that?
>>
>>   "In this type of scenario" -> "When rogue routers might be present"
>>
>> >
>> > 22. Appendix A:
>> >
>> > s/pakcet/packet/
>> Check.
>> >
>> > 23. General remark:
>> >
>> > Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required s=
ection I was a little
>> surprised
>> > not to encounter it, as it=E2=80=99s usually present. Your call of cou=
rse.
>> Acknowledgements are due to a lot of people - thanks for the reminder!
>>
>> Naturally Yours,
>> Charlie P.
>>
>>
>

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Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi John,<div><br></div><div>Many thanks for your prompt re=
ply :-).=C2=A0 The week following IETF-112 is Ok.</div><div><br></div><div>=
Best=C2=A0wishes,</div><div>Ines.=C2=A0</div></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Nov 5, 2021 at 9:34 PM=
 John Scudder &lt;<a href=3D"mailto:jgs@juniper.net">jgs@juniper.net</a>&gt=
; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px=
 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">



<div style=3D"overflow-wrap: break-word;">
Hi Ines and all,
<div><br>
</div>
<div>Thanks for your patience. I hope it will be OK if I don=E2=80=99t revi=
ew and reply in detail until the week following IETF-112? If it=E2=80=99s m=
ore urgent than that, let me know please.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>=E2=80=94John<br>
<div>
<div><br>
<blockquote type=3D"cite">
<div>On Nov 5, 2021, at 3:28 PM, Ines Robles &lt;<a href=3D"mailto:mariaine=
srobles@googlemail.com" target=3D"_blank">mariainesrobles@googlemail.com</a=
>&gt; wrote:</div>
<br>
<div>
<div>
<div><br>
</div>
<div style=3D"background-color:rgb(255,235,156);width:100%;border:1pt none =
rgb(156,101,0);padding:2pt;font-size:10.5pt;line-height:12pt;font-family:La=
to;text-align:left;font-weight:bold">
<span>[External Email. Be cautious of content]</span></div>
<br>
<div><br>
</div>
<div>
<div dir=3D"ltr">
<div dir=3D"ltr"><font face=3D"arial, sans-serif">Hello John,</font>
<div><font face=3D"arial, sans-serif"><br>
</font></div>
<div><font face=3D"arial, sans-serif">Thank you for your comments to improv=
e the document. We believe that v11 addresses your DISCUSS points, please l=
et us know.=C2=A0</font></div>
<div><font face=3D"arial, sans-serif"><br>
</font></div>
<div><font face=3D"arial, sans-serif">Please find comments below correspond=
ing to version 11 in [v11]=C2=A0</font></div>
<div><font face=3D"arial, sans-serif"><br>
</font></div>
<div><span id=3D"gmail-m_-8151377444261730316m_4092764220379430868gmail-doc=
s-internal-guid-fcc6b48a-7fff-be72-31a2-83a4cdc0ec85"><font face=3D"arial, =
sans-serif">
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">----------------------------------------=
------------------------------</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">DISCUSS:</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">----------------------------------------=
------------------------------</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">A lot of effort has clearly gone into th=
is work, thank
 you. I do have one topic</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">I want to DISCUSS, as it seriously impac=
ted the readability
 of the document</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">from my point of view. I don=E2=80=99t a=
nticipate that it will
 be very difficult to</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">resolve this DISCUSS as it relates to cl=
arity and not
 to anything fundamental.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">My chief difficulty with the document is=
 placing it
 in context. No hints are</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">given to the reader as to what the
</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;vertical-align:baseline;white-space:pre-wrap">expected network enviro=
nment is</span><span style=3D"font-variant-numeric:normal;font-variant-east=
-asian:normal;vertical-align:baseline;white-space:pre-wrap">.
 I think it</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">would be almost sufficient to say, for e=
xample =E2=80=9C</span><span style=3D"font-variant-numeric:normal;font-vari=
ant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">the
 network environment is</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">assumed to be the same as described in R=
FC 6550</span><span style=3D"font-variant-numeric:normal;font-variant-east-=
asian:normal;vertical-align:baseline;white-space:pre-wrap">,
 Section 1=E2=80=9D for example, but</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">without that hint and without a strong b=
ackground in
 ROLL, I found myself</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">struggling. Figures 4 and 5 in particula=
r lead me to
 believe the expected</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">environment looks similar to a classic I=
SP network =E2=80=94
 a collection of nodes</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">connected by point-to-point links. If th=
is isn=E2=80=99t correct
 (and I bet it=E2=80=99s not)</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">that may have led me into incorrect assu=
mptions, which
 may be reflected in my</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">other comments below.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 3, new tex=
t:
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The =
network environment that is considered in this</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0doc=
ument is assumed to be the
 same as described in</span><a href=3D"https://urldefense.com/v3/__https://=
datatracker.ietf.org/doc/html/rfc6550*section-1__;Iw!!NEt6yMaO-gk!Rstby0bTB=
7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZy79-H5mg$" style=3D"text-decor=
ation-line:none" target=3D"_blank"><span style=3D"color:rgb(0,0,255);font-v=
ariant-numeric:normal;font-variant-east-asian:normal;vertical-align:baselin=
e;white-space:pre-wrap">
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;text-decoration-line:underline;vertical-align:base=
line;white-space:pre-wrap">Section 1 of</span></a></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href=3D=
"https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/rfc6550*=
section-1__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-F=
gUc84JZy79-H5mg$" style=3D"text-decoration-line:none" target=3D"_blank"><sp=
an style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-eas=
t-asian:normal;text-decoration-line:underline;vertical-align:baseline;white=
-space:pre-wrap">=C2=A0=C2=A0=C2=A0[RFC6550]</span></a><span style=3D"color=
:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;ve=
rtical-align:baseline;white-space:pre-wrap">.</span><span style=3D"font-var=
iant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;=
white-space:pre-wrap">=C2=A0</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Further, it=E2=80=99s not stated anywher=
e
</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;vertical-align:baseline;white-space:pre-wrap">whether AODV-RPL is int=
ended to stand alone</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">as its own routing protocol, or to be vi=
ewed as an extension
 of RPL</span><span style=3D"font-weight:700;font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=
.</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">
 In the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">former case, it seems the document is la=
cking details
 that are present in RFC</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">6550. I=E2=80=99m assuming the latter is=
 the case, but a clear
 statement to that effect</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">seems indicated.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 3,
</span><span style=3D"color:rgb(0,0,255);white-space:pre-wrap">new text</sp=
an><span style=3D"font-variant-numeric:normal;font-variant-east-asian:norma=
l;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">:
</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">AODV=
-RPL reuses and extends the core RPL functionality to support</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0rou=
tes with bidirectional asymmetric
 links </span></div>
<br>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">----------------------------------------=
------------------------------</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">COMMENT:</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">----------------------------------------=
------------------------------</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">1. Section 1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Reply.=C2=A0 AODV-RPL =
currently omits some features compared
 to AODV -- in</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0particular, flagging R=
oute Errors, blacklisting unidirectional
 links,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0multihoming, and handl=
ing unnumbered interfaces.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Your use of language is entirely up to y=
ou, but I feel
 obliged to point out</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">that there=E2=80=99s been a lot of discu=
ssion in the IETF community
 recently about use</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">of language that raises sensitive points=
, and about
 the term =E2=80=9Cblacklisting=E2=80=9D in</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">particular. I understand that this is th=
e only place
 in the document the term</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">appears, and since it refers to AODV you=
 can=E2=80=99t just
 use another term, but</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">placing it in quotation marks might make=
 it clear that
 it=E2=80=99s referring verbatim</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">to the language of RFC 3561.</span></div=
>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11]
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">(Pag=
e 3),
</span><span style=3D"color:rgb(0,0,255);white-space:pre-wrap">new text</sp=
an><span style=3D"font-variant-numeric:normal;font-variant-east-asian:norma=
l;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">:
</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">=C2=
=A0</span><span style=3D"font-variant-numeric:normal;font-variant-east-asia=
n:normal;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">A=
ODV-RPL
 currently omits some features compared to AODV -- in</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0par=
ticular, flagging Route Errors,
 &quot;blacklisting&quot; unidirectional</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0lin=
ks ([</span><a href=3D"https://urldefense.com/v3/__https://datatracker.ietf=
.org/doc/html/rfc3561__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4=
nSeCB3Pg-FgUc84JZwouiSuEQ$" style=3D"text-decoration-line:none" target=3D"_=
blank"><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;text-decoration-line:underline;vertical-align:base=
line;white-space:pre-wrap">RFC3561</span></a><span style=3D"color:rgb(0,0,2=
55);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">]),
 multihoming, and handling unnumbered interfaces.=C2=A0</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">2. Section 1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0support for storing and non-=
storing modes.=C2=A0 AODV adds
 basic messages</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0RREQ and RREP as part of RPL=
 DIO (DODAG Information
 Object) control</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Did you mean =E2=80=9CAODV-RPL adds=E2=
=80=9D?</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 3: It was =
changed to
</span><span style=3D"color:rgb(0,0,255);font-weight:700;font-variant-numer=
ic:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spac=
e:pre-wrap">AODV-RPL adds basic messages</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">3. Section 2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Symmetric route</span>=
</div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The =
upstream and downstream routes traverse the
 same routers.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Same routers? Or same links? (Or both, i=
f multi-access
 links are part of the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">mix, as I imagine they may be?)</span></=
div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 5,
</span><span style=3D"color:rgb(0,0,255);white-space:pre-wrap">new text</sp=
an><span style=3D"font-variant-numeric:normal;font-variant-east-asian:norma=
l;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">:
</span><span style=3D"font-variant-numeric:normal;font-variant-east-asian:n=
ormal;color:rgb(0,0,255);vertical-align:baseline;white-space:pre-wrap">Symm=
etric route: The upstream and downstream routes traverse the same routers a=
nd</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0over the same links.</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">4. Section 4.1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0OrigNode sets its IPv6=
 address in the DODAGID field
 of the RREQ-DIO</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0message.=C2=A0 A RREQ-=
DIO message MUST carry exactly one
 RREQ option,</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Should that say =E2=80=9Cone of its IPv6=
 addresses&quot;? Is it even
 necessary to restate</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">this? RFC 6550 =C2=A76.3.1 already has a=
 clearer requirement:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0DODAGID: 128-bit IPv6 =
address set by a DODAG root
 that uniquely</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0identifies a DODAG.=C2=A0 The DODAGID MUST be a
 routable IPv6</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0address belonging to the DODAG root.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 6-New text=
:
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Orig=
Node selects one of its IPv6 addresses and sets it in the DODAGID</span></d=
iv>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0fie=
ld of the RREQ-DIO message.</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">5. Section S4.1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0TargNode can join the RREQ i=
nstance at a Rank whose
 integer portion</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0is equal to the MaxRank.</sp=
an></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Not less than or equal, right? Strict eq=
uality to MaxRank
 is required?</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 8, new tex=
t:
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Targ=
Node can join the RREQ instance at a Rank whose integer portion</span></div=
>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0is =
less than or equal to the MaxRank.</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">6. Section 4.2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0TargNode sets its IPv6=
 address in the DODAGID field
 of the RREP-DIO</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0message.=C2=A0 A RREP-=
DIO message MUST carry exactly one
 RREP option,</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Same as #4.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 8, new tex=
t:
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Targ=
Node sets one of its IPv6 addresses in the DODAGID field of the</span></div=
>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0RRE=
P-DIO message.</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">7. Section 4.2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Address Vector</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Only prese=
nt when the H bit is set to 0.=C2=A0 For an
 asymmetric route,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the Addres=
s Vector represents the IPv6 addresses
 of the route that</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the RREP-D=
IO has passed.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">The first time I read through this, I di=
dn=E2=80=99t understand
 it at all. On</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">re-reading, I think you=E2=80=99re using=
 the word =E2=80=9Croute=E2=80=9D in
 two different ways in the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">same sentence, the first time to mean =
=E2=80=9Croute=E2=80=9D in the
 sense of an object in the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">protocol, the second time in the more ca=
sual sense of
 =E2=80=9Ca path through the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">network=E2=80=9D. If that=E2=80=99s righ=
t, I suggest rewriting the second
 instance, as in =E2=80=9C=E2=80=A6</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">represents the IPv6 addresses of the pat=
h through the
 network the RREP-DIO has</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Traversed.=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(255,0,0);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[</span><span style=
=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian:=
normal;vertical-align:baseline;white-space:pre-wrap">v11]
 Page 10, new text: </span><span style=3D"color:rgb(0,0,255);font-variant-n=
umeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-=
space:pre-wrap">Address Vector</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0Only present when the H bit
 is set to 0.=C2=A0 For an asymmetric route,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0the Address Vector represents
 the IPv6 addresses of the path</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0through the network the RREP-DIO
 has passed.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">Passed was not change=
d to Traversed.=C2=A0</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Also, as in point #4, is it right to say=
 *the* IPv6
 addresses? Couldn=E2=80=99t any</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">given node have various IPv6 addresses? =
So maybe just
 lose the definite</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">article, as in =E2=80=9C=E2=80=A6 repres=
ents IPv6 addresses of the path=E2=80=A6=E2=80=9D?</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">8. Section 4.3:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0r</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0A one-bit =
reserved field.=C2=A0 This field MUST be initialized
 to zero</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0by the sen=
der and MUST be ignored by the receiver.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">The figure doesn=E2=80=99t show an =E2=
=80=9Cr=E2=80=9D field. I assume the field
 labeled =E2=80=9CX=E2=80=9D should be</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">relabeled as =E2=80=9Cr=E2=80=9D?</span>=
</div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 11: change=
d to X.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">9. Section 5:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Figure 4.=C2=A0 If an =
intermediate router sends out RREQ-DIO
 with the S</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0bit set to 1, then all=
 the one-hop links on the route
 from the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0OrigNode O to this rou=
ter meet the requirements of
 route discovery,</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">On first reading I didn=E2=80=99t unders=
tand this. Having read
 the whole document, I</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">now get it (I think!). Possibly changing=
 =E2=80=9Cmeet=E2=80=9D to =E2=80=9Chave
 met=E2=80=9D would have been</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">enough to get me past my initial befuddl=
ement.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 11: change=
d to =E2=80=9Chas met=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">10. Section 5:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0The criteria used to d=
etermine whether or not each
 link is symmetric</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0is beyond the scope of=
 the document.=C2=A0 For instance,
 intermediate</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Should be =E2=80=9Ccriterion =E2=80=A6 i=
s beyond&quot;, or &quot;criteria =E2=80=A6 are
 beyond&quot;, depending on</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">whether you want singular or plural.</sp=
an></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">[v11] Page12, No=
t Corrected.
 [Can this be addressed by the RFC Editor?]</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47"><br>
</font></span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">11. Section 5:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0routers can use local inform=
ation (e.g., bit rate,
 bandwidth, number</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0of cells used in 6tisch)</sp=
an></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">I wouldn=E2=80=99t have minded a referen=
ce for 6tisch.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11]Page 12, referen=
ce added, new
 text: ...</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:nor=
mal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-=
wrap">cells used in 6tisch [</span><a href=3D"https://urldefense.com/v3/__h=
ttps://datatracker.ietf.org/doc/html/rfc9030__;!!NEt6yMaO-gk!Rstby0bTB7wzJO=
1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZzNb2CTyA$" style=3D"text-decoration=
-line:none" target=3D"_blank"><span style=3D"color:rgb(0,0,255);font-varian=
t-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underl=
ine;vertical-align:baseline;white-space:pre-wrap">RFC9030</span></a><span s=
tyle=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre-wrap">])...</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">12. Section 5:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Upon receiving a RREQ-=
DIO with the S bit set to 1,
 a node determines</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0whether this one-hop l=
ink can be used symmetrically,
 i.e., both the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0two directions meet th=
e requirements of data transmission.=C2=A0
 If the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0RREQ-DIO arrives over =
an interface that is not known
 to be symmetric,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0or is known to be asym=
metric, the S bit is set to
 0.=C2=A0 If the S bit</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0arrives already set to=
 be &#39;0&#39;, it is set to be &#39;0&#39;
 on retransmission</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">The term =E2=80=9Cretransmission=E2=80=
=9D seems misused here. I guess
 you mean something like</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=E2=80=9Cwhen the RREQ-DIO is propagated=
=E2=80=9D.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 12, change=
d to propagated:
 ..</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;fon=
t-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">w=
hen the RREQ-DIO is propagated.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">13. Section 5:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Appendix A describes an exam=
ple method using the upstream
 Expected</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Number of Transmissions&quot=
; (ETX) and downstream Received
 Signal</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Strength Indicator (RSSI) to=
 estimate whether the
 link is symmetric</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0in terms of link quality is =
given in using an averaging
 technique.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">This sentence needs a rewrite to make it=
 grammatical.
 It works up until &quot;is</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">given in using an averaging technique=E2=
=80=9D.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 13, new te=
xt: =E2=80=9C</span><a href=3D"https://urldefense.com/v3/__https://datatrac=
ker.ietf.org/doc/html/draft-ietf-roll-aodv-rpl-11*appendix-A__;Iw!!NEt6yMaO=
-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZxX0Ve_6g$" style=
=3D"text-decoration-line:none" target=3D"_blank"><span style=3D"color:rgb(0=
,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical=
-align:baseline;white-space:pre-wrap">
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;text-decoration-line:underline;vertical-align:base=
line;white-space:pre-wrap">Appendix A</span></a><span style=3D"color:rgb(0,=
0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-=
align:baseline;white-space:pre-wrap">
 describes an example method using the upstream Expected</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Num=
ber of Transmissions (ETX)
 and downstream Received Signal Strength</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Ind=
icator (RSSI) to estimate whether
 the link is symmetric in terms</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0of =
link quality using an averaging
 technique.</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:no=
rmal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre=
-wrap">=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">14. Section 6.2.1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If the S b=
it in the received RREQ-DIO is set to
 1, the router MUST</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0determine =
whether each direction of the link (by
 which the RREQ-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0DIO is rec=
eived) satisfies the Objective Function.=C2=A0
 In case that</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the downwa=
rd (i.e. towards the TargNode) direction
 of the link</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0does not s=
atisfy the Objective Function, the link
 can&#39;t be used</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0symmetrica=
lly, thus the S bit of the RREQ-DIO to
 be sent out MUST</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0be set as =
0.=C2=A0 If the S bit in the received RREQ-DIO
 is set to 0,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the router=
 MUST determine into the upward direction
 (towards the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0OrigNode) =
of the link.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">The last sentence doesn=E2=80=99t make s=
ense.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 14, Step 1=
 section was
 re-written, new text:=E2=80=9D</span><span style=3D"color:rgb(0,0,255);fon=
t-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:base=
line;white-space:pre-wrap">Step 1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0The router MUST first determine
 whether to propagate the RREQ-DIO.</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0It does this by determining
 whether or not the downstream</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0direction of the incoming link
 satisfies the Objective Function</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0(OF).=C2=A0 If not the RREQ-DIO
 MUST be dropped, and the following</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0steps are not processed.=C2=A0 Otherwise,
 the router MUST join the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0RREQ-Instance and prepare to
 propagate the RREQ-DIO.=C2=A0 The upstream</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0neighbor router that transmitted
 the received RREQ-DIO is selected</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0as the preferred parent.</span><span style=3D"color:rgb(0,0,=
255);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">15. Section 6.2.1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If the rou=
ter is an intermediate router, then it
 transmits a RREQ-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0DIO via li=
nk-local multicast;</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">On what interface? Routers generally can=
 have multiple
 interfaces. Again, this</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">is a place a clear description of the ne=
twork environment
 might have helped.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 15, Step 4=
 new text as
 follows: =E2=80=9C</span><span style=3D"color:rgb(0,0,255);font-variant-nu=
meric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-s=
pace:pre-wrap">Step 4:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0The router checks whether one
 of its addresses is included in one</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0of the ART Options.=C2=A0 If so,
 this router is one of the TargNodes.</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0Otherwise, it is an intermediate
 router.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0If the router is an intermediate
 router, then it transmits the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0RREQ-DIO via link-local multicast;
 if the H bit is set to 0, the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0intermediate router MUST include
 the address of the interface</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0receiving the RREQ-DIO into
 the address vector.=C2=A0 Otherwise, the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0router is TargNode; if it was
 not already associated with the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0RREQ-Instance, it prepares
 and transmits a RREP-DIO (</span><a href=3D"https://urldefense.com/v3/__ht=
tps://datatracker.ietf.org/doc/html/draft-ietf-roll-aodv-rpl-11*section-6.3=
__;Iw!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZxW=
UDAY_A$" style=3D"text-decoration-line:none" target=3D"_blank"><span style=
=3D"font-variant-numeric:normal;font-variant-east-asian:normal;text-decorat=
ion-line:underline;vertical-align:baseline;white-space:pre-wrap">Section
 6.3</span></a><span style=3D"color:rgb(0,0,255);font-variant-numeric:norma=
l;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wr=
ap">).</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0If, on the other hand, TargNode
 was already associated with the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0RREQ-Instance, it takes no
 further action and does not send an</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0RREP-DIO.</span><span style=3D"color:rgb(0,0,255);font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">16. Section 6.2.2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0If the OrigNode tries to rea=
ch multiple TargNodes
 in a single RREQ-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Instance, one of the TargNod=
es can be an intermediate
 router to the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0others, therefore it MUST co=
ntinue sending RREQ-DIO
 to reach other</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0targets.=C2=A0 In this case,=
 before rebroadcasting the
 RREQ-DIO</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">The use of the term =E2=80=9Cbroadcast=
=E2=80=9D here confuses me. Is
 this =E2=80=9Cbroadcast=E2=80=9D in the RF</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">sense? Again, this is a place a clear de=
scription of
 the network environment</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">might have helped.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 16, rebroa=
dcasting changed
 to transmitting, new text states: =E2=80=9C</span><span style=3D"color:rgb=
(0,0,255);font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap"> If the OrigNode tries to reach mul=
tiple TargNodes in a single RREQ-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Ins=
tance, one of the TargNodes
 can be an intermediate router to the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0oth=
ers, therefore it MUST continue
 sending RREQ-DIO to reach other</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0tar=
gets.=C2=A0 In this case, before
 transmitting the RREQ-DIO via link-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0loc=
al multicast, a TargNode MUST
 delete the Target Option</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0enc=
apsulating its own address,
 so that downstream routers with higher</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0Ran=
k values do not try to create
 a route to this TargNode.</span><span style=3D"color:rgb(0,0,255);font-var=
iant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;=
white-space:pre-wrap">=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">17. Section 6.2.2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0send out any RREQ-DIO.=C2=A0=
 For the purposes of determining
 the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0intersection with previous i=
ncoming RREQ-DIOs, the
 intermediate</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0router maintains a record of=
 the targets that have
 been requested</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0associated with the RREQ-Ins=
tance.=C2=A0 Any RREQ-DIO message
 with</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0different ART Options coming=
 from a router with higher
 Rank is</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0ignored.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">It=E2=80=99s not clear to me if the last=
 sentence goes with
 the previous and if so,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">how. Does it even relate to multiple tar=
gets? Also,
 different from what? If it</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">has the same ART Options (same as what?)=
 is it *not*
 ignored?</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Page 16, new te=
xt: =E2=80=9C ...</span><span style=3D"color:rgb(0,0,255);font-variant-nume=
ric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-spa=
ce:pre-wrap">If
 the intersection is empty, it</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0mea=
ns that all the targets have
 been reached, and the router MUST NOT</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0tra=
nsmit any RREQ-DIO.=C2=A0 For the
 purposes of determining the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0int=
ersection with previous incoming
 RREQ-DIOs, the intermediate</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0rou=
ter maintains a record of the
 targets that have been requested for</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0a g=
iven RREQ-Instance.=C2=A0 Any incoming
 RREQ-DIO message having multiple</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0ART=
 Options coming from a router
 with higher Rank than the Rank of</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0the=
 stored targets is ignored.</span><span style=3D"color:rgb(0,0,255);font-va=
riant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline=
;white-space:pre-wrap">=E2=80=9D</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">18. Section 6.3.1:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0implementation-specific and =
out of scope.=C2=A0 If the
 implementation</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0selects the symmetric route,=
 and the L bit is not
 0, the TargNode MAY</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0delay transmitting the RREP-=
DIO for duration RREP_WAIT_TIME
 to await</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0a symmetric route with a low=
er Rank.=C2=A0 The value of
 RREP_WAIT_TIME is</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0set by default to 1/4 of the=
 time duration determined
 by the L bit.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">It=E2=80=99s not an L bit though, it=E2=
=80=99s an L field.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] L bit was chang=
ed to L field
 in the document</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">19. Section 6.3.2:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0multicast until the OrigNode=
 is reached or MaxRank
 is exceeded.=C2=A0 The</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0TargNode MAY delay transmitt=
ing the RREP-DIO for duration</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0RREP_WAIT_TIME to await a ro=
ute with a lower Rank.=C2=A0
 The value of</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0RREP_WAIT_TIME is set by def=
ault to 1/4 of the time
 duration</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0determined by the L bit.</sp=
an></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Again, it=E2=80=99s an L field. Also, wh=
at if L is zero? Is
 RREP_WAIT_TIME set to</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">infinity, as the text implies?</span></d=
iv>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Please do a global search for =E2=80=9CL=
 bit=E2=80=9D, as there are
 additional instances I</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">haven=E2=80=99t called out.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] L bit was chang=
ed to L field
 in the document</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">20. Section 6.4:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0Step 4:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0If t=
he receiver is the OrigNode, it can start
 transmitting the</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0appl=
ication data to TargNode along the path as
 provided in RREP-</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Inst=
ance, and processing for the RREP-DIO is complete.=C2=A0
 Otherwise,</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0in c=
ase of an asymmetric route, the intermediate
 router MUST</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0incl=
ude the address of the interface receiving
 the RREP-DIO into</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0the =
address vector, and then transmit the RREP-DIO
 via link-local</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0mult=
icast.=C2=A0 In case of a symmetric route, the
 RREP-DIO message is</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">As with #15: on what interface(s)?</span=
></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">[v11] Page 19,=
=C2=A0 Step
 4 first paragraph remains the same,</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">Charlie made a q=
uestion:
 =E2=80=9C Are we assuming a single interface?=E2=80=9D</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">----------------=
------------------------------------------------------</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">RESPONSE to Comm=
ent 20:</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">----------------=
------------------------------------------------------</font></span></div>
<font color=3D"#741b47"><br>
</font>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">AODV-RPL routers=
 can
 have multiple router interfaces.=C2=A0 Per-node</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">configuration of=
 &quot;RREP-DIO
 transmission interfaces&quot; is an administrative</font></span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"><font color=3D"#741b47">feature which is=
 beyond
 the scope of the document.</font></span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">21. Section 10:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0fake AODV-RPL route discover=
ies.=C2=A0 In this type of
 scenario, RPL&#39;s</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0preinstalled mode of operati=
on, where the key to use
 for a P2P-RPL</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">=C2=A0=C2=A0route discovery is preinstal=
led, SHOULD be used.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">What type of scenario is that?</span></d=
iv>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[V11] Page 22, new te=
xt:
</span><span style=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">When=
 rogue routers might be=C2=A0 present, RPL&#39;s preinstalled mode of opera=
tion, where the key to use=C2=A0 for route
 discovery is preinstalled, SHOULD be used.</span></div>
<br>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">22. Appendix A:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">s/pakcet/packet/</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[V11] Page 25, fixed.=
=C2=A0</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">23. General remark:</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">Although =E2=80=9Cacknowledgements=E2=80=
=9D isn=E2=80=99t a required section
 I was a little surprised</span></div>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap">not to encounter it, as it=E2=80=99s usu=
ally present. Your call
 of course.</span></div>
<br>
<div style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span styl=
e=3D"color:rgb(0,0,255);font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre-wrap">[v11] Added</span></d=
iv>
</font></span><br>
</div>
<div><br>
</div>
<div>Thank you very much,</div>
<div><br>
</div>
<div>Ines.=C2=A0</div>
</div>
<br>
<div class=3D"gmail_quote">
<div dir=3D"ltr" class=3D"gmail_attr">On Fri, May 7, 2021 at 4:58 AM Charli=
e Perkins &lt;<a href=3D"mailto:charles.perkins@earthlink.net" target=3D"_b=
lank">charles.perkins@earthlink.net</a>&gt; wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
Hello John,<br>
<br>
It&#39;s taken a while for me to get to this, please excuse the delay. I <b=
r>
have some followup to your comments interspersed below.<br>
<br>
On 4/19/2021 1:31 PM, John Scudder via Datatracker wrote:<br>
&gt; John Scudder has entered the following ballot position for<br>
&gt; draft-ietf-roll-aodv-rpl-10: Discuss<br>
&gt;<br>
&gt; When responding, please keep the subject line intact and reply to all<=
br>
&gt; email addresses included in the To and CC lines. (Feel free to cut thi=
s<br>
&gt; introductory paragraph, however.)<br>
&gt;<br>
&gt;<br>
&gt; Please refer to <a href=3D"https://urldefense.com/v3/__https://www.iet=
f.org/iesg/statement/discuss-criteria.html__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1N=
oK_SCiEP-uCChnwCWuKE4nSeCB3Pg-FgUc84JZzWjkQ5DQ$" rel=3D"noreferrer" target=
=3D"_blank">
https://www.ietf.org/iesg/statement/discuss-criteria.html</a><br>
&gt; for more information about DISCUSS and COMMENT positions.<br>
&gt;<br>
&gt;<br>
&gt; The document, along with other ballot positions, can be found here:<br=
>
&gt; <a href=3D"https://urldefense.com/v3/__https://datatracker.ietf.org/do=
c/draft-ietf-roll-aodv-rpl/__;!!NEt6yMaO-gk!Rstby0bTB7wzJO1NoK_SCiEP-uCChnw=
CWuKE4nSeCB3Pg-FgUc84JZzbGphdAw$" rel=3D"noreferrer" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-ietf-roll-aodv-rpl/</a><br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; DISCUSS:<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt;<br>
&gt; A lot of effort has clearly gone into this work, thank you. I do have =
one topic<br>
&gt; I want to DISCUSS, as it seriously impacted the readability of the doc=
ument<br>
&gt; from my point of view. I don=E2=80=99t anticipate that it will be very=
 difficult to<br>
&gt; resolve this DISCUSS as it relates to clarity and not to anything fund=
amental.<br>
&gt;<br>
&gt; My chief difficulty with the document is placing it in context. No hin=
ts are<br>
&gt; given to the reader as to what the expected network environment is. I =
think it<br>
&gt; would be almost sufficient to say, for example =E2=80=9Cthe network en=
vironment is<br>
&gt; assumed to be the same as described in RFC 6550, Section 1=E2=80=9D fo=
r example, but<br>
&gt; without that hint and without a strong background in ROLL, I found mys=
elf<br>
&gt; struggling. Figures 4 and 5 in particular lead me to believe the expec=
ted<br>
&gt; environment looks similar to a classic ISP network =E2=80=94 a collect=
ion of nodes<br>
&gt; connected by point-to-point links. If this isn=E2=80=99t correct (and =
I bet it=E2=80=99s not)<br>
&gt; that may have led me into incorrect assumptions, which may be reflecte=
d in my<br>
&gt; other comments below.<br>
&gt;<br>
&gt; Further, it=E2=80=99s not stated anywhere whether AODV-RPL is intended=
 to stand alone<br>
&gt; as its own routing protocol, or to be viewed as an extension of RPL. I=
n the<br>
&gt; former case, it seems the document is lacking details that are present=
 in RFC<br>
&gt; 6550. I=E2=80=99m assuming the latter is the case, but a clear stateme=
nt to that effect<br>
&gt; seems indicated.<br>
How about this text:<br>
=C2=A0=C2=A0=C2=A0 Routing Protocol for Low-Power and Lossy Networks (RPL) =
[RFC6550] is<br>
=C2=A0=C2=A0=C2=A0 an IPv6 distance vector routing protocol designed to sup=
port multiple<br>
=C2=A0=C2=A0=C2=A0 traffic flows through a root-based Destination-Oriented =
Directed<br>
=C2=A0=C2=A0=C2=A0 Acyclic Graph (DODAG).=C2=A0 Typically, a router does no=
t have routing<br>
=C2=A0=C2=A0=C2=A0 information for most other routers.=C2=A0 Consequently, =
for traffic<br>
=C2=A0=C2=A0=C2=A0 between routers within the DODAG (i.e., Point-to-Point (=
P2P) traffic)<br>
=C2=A0=C2=A0=C2=A0 data packets either have to traverse the root in non-sto=
ring mode, or<br>
=C2=A0=C2=A0=C2=A0 traverse a common ancestor in storing mode.=C2=A0 Such P=
2P traffic is<br>
=C2=A0=C2=A0=C2=A0 thereby likely to traverse longer routes and may suffer =
severe<br>
=C2=A0=C2=A0=C2=A0 congestion near the root (for more information see [RFC6=
997],<br>
=C2=A0=C2=A0=C2=A0 [RFC6998]). The network environment that is considered i=
n this document<br>
=C2=A0=C2=A0=C2=A0 assumed to be the same as described in Section 1 of [RFC=
6550].<br>
<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; COMMENT:<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt;<br>
&gt; 1. Section 1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Reply.=C2=A0 AODV-RPL currently omits some features=
 compared to AODV -- in<br>
&gt;=C2=A0 =C2=A0 =C2=A0particular, flagging Route Errors, blacklisting uni=
directional links,<br>
&gt;=C2=A0 =C2=A0 =C2=A0multihoming, and handling unnumbered interfaces.<br=
>
&gt;<br>
&gt; Your use of language is entirely up to you, but I feel obliged to poin=
t out<br>
&gt; that there=E2=80=99s been a lot of discussion in the IETF community re=
cently about use<br>
&gt; of language that raises sensitive points, and about the term =E2=80=9C=
blacklisting=E2=80=9D in<br>
&gt; particular. I understand that this is the only place in the document t=
he term<br>
&gt; appears, and since it refers to AODV you can=E2=80=99t just use anothe=
r term, but<br>
&gt; placing it in quotation marks might make it clear that it=E2=80=99s re=
ferring verbatim<br>
&gt; to the language of RFC 3561.<br>
<br>
This is an evolving issue.=C2=A0 I am fine with using quotes but otherwise =
<br>
maintaining consistent terminology.=C2=A0 For instance,<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0 AODV-RPL currently omits some features compared to=
 AODV -- in<br>
=C2=A0=C2=A0=C2=A0=C2=A0 particular, flagging Route Errors, &quot;blacklist=
ing&quot; unidirectional links<br>
=C2=A0=C2=A0=C2=A0=C2=A0 [RFC3561], multihoming, and handling unnumbered in=
terfaces.<br>
<br>
If there is an official list of terms to search for please let us know.<br>
<br>
&gt;<br>
&gt; 2. Section 1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 support for storing and non-storing modes.=C2=A0 AODV add=
s basic messages<br>
&gt;=C2=A0 =C2=A0 RREQ and RREP as part of RPL DIO (DODAG Information Objec=
t) control<br>
&gt;<br>
&gt; Did you mean =E2=80=9CAODV-RPL adds=E2=80=9D?<br>
Yes, will fix.<br>
<br>
&gt;<br>
&gt; 3. Section 2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Symmetric route<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 The upstream and downstream routes traverse=
 the same routers.<br>
&gt;<br>
&gt; Same routers? Or same links? (Or both, if multi-access links are part =
of the<br>
&gt; mix, as I imagine they may be?)<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 The upstream and downstream routes tra=
verse the same routers and over<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the same links.<br>
&gt; 4. Section 4.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0OrigNode sets its IPv6 address in the DODAGID field=
 of the RREQ-DIO<br>
&gt;=C2=A0 =C2=A0 =C2=A0message.=C2=A0 A RREQ-DIO message MUST carry exactl=
y one RREQ option,<br>
&gt;<br>
&gt; Should that say =E2=80=9Cone of its IPv6 addresses&quot;? Is it even n=
ecessary to restate<br>
&gt; this? RFC 6550 =C2=A76.3.1 already has a clearer requirement:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0DODAGID: 128-bit IPv6 address set by a DODAG root t=
hat uniquely<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0identifies a DODAG.=C2=A0 The =
DODAGID MUST be a routable IPv6<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address belonging to the DODAG=
 root.<br>
<br>
I&#39;m not quite sure what is requested.=C2=A0 Should it be &quot;OrigNode=
 sets the <br>
DODAGID field&quot;, relying on the definition provided in RFC 6550? Should=
 <br>
it be &quot;OrigNode sets one of its routable IPv6 address in the DODAGID f=
ield&quot;?<br>
Honestly, I thought the meaning was clear.=C2=A0 Unless there is an <br>
objection, I reckon we will use the latter wording.<br>
<br>
&gt;<br>
&gt; 5. Section S4.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 TargNode can join the RREQ instance at a Rank whose integ=
er portion<br>
&gt;=C2=A0 =C2=A0 is equal to the MaxRank.<br>
&gt;<br>
&gt; Not less than or equal, right? Strict equality to MaxRank is required?=
<br>
The existing text isn&#39;t good.=C2=A0 Instead,<br>
<br>
=C2=A0=C2=A0=C2=A0 TargNode can join the RREQ instance at a Rank whose inte=
ger portion<br>
=C2=A0=C2=A0=C2=A0 is less than the MaxRank.<br>
<br>
<br>
&gt; 6. Section 4.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0TargNode sets its IPv6 address in the DODAGID field=
 of the RREP-DIO<br>
&gt;=C2=A0 =C2=A0 =C2=A0message.=C2=A0 A RREP-DIO message MUST carry exactl=
y one RREP option,<br>
&gt;<br>
&gt; Same as #4.<br>
&gt;<br>
&gt; 7. Section 4.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Address Vector<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Only present when the H bit is set to 0.=C2=
=A0 For an asymmetric route,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the Address Vector represents the IPv6 addre=
sses of the route that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the RREP-DIO has passed.<br>
&gt;<br>
&gt; The first time I read through this, I didn=E2=80=99t understand it at =
all. On<br>
&gt; re-reading, I think you=E2=80=99re using the word =E2=80=9Croute=E2=80=
=9D in two different ways in the<br>
&gt; same sentence, the first time to mean =E2=80=9Croute=E2=80=9D in the s=
ense of an object in the<br>
&gt; protocol, the second time in the more casual sense of =E2=80=9Ca path =
through the<br>
&gt; network=E2=80=9D. If that=E2=80=99s right, I suggest rewriting the sec=
ond instance, as in =E2=80=9C=E2=80=A6<br>
&gt; represents the IPv6 addresses of the path through the network the RREP=
-DIO has<br>
&gt; traversed.=E2=80=9D<br>
&gt;<br>
&gt; Also, as in point #4, is it right to say *the* IPv6 addresses? Couldn=
=E2=80=99t any<br>
&gt; given node have various IPv6 addresses? So maybe just lose the definit=
e<br>
&gt; article, as in =E2=80=9C=E2=80=A6 represents IPv6 addresses of the pat=
h=E2=80=A6=E2=80=9D?<br>
<br>
Good point.=C2=A0 We will use your formulation.<br>
<br>
&gt;<br>
&gt; 8. Section 4.3:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 r<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0A one-bit reserved field.=C2=A0 This field M=
UST be initialized to zero<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0by the sender and MUST be ignored by the rec=
eiver.<br>
&gt;<br>
&gt; The figure doesn=E2=80=99t show an =E2=80=9Cr=E2=80=9D field. I assume=
 the field labeled =E2=80=9CX=E2=80=9D should be<br>
&gt; relabeled as =E2=80=9Cr=E2=80=9D?<br>
Actually, the description should refer to an &quot;X&quot; field, not an &q=
uot;r&quot; <br>
field.=C2=A0 We will update.<br>
<br>
<br>
&gt;<br>
&gt; 9. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Figure 4.=C2=A0 If an intermediate router sends out=
 RREQ-DIO with the S<br>
&gt;=C2=A0 =C2=A0 =C2=A0bit set to 1, then all the one-hop links on the rou=
te from the<br>
&gt;=C2=A0 =C2=A0 =C2=A0OrigNode O to this router meet the requirements of =
route discovery,<br>
&gt;<br>
&gt; On first reading I didn=E2=80=99t understand this. Having read the who=
le document, I<br>
&gt; now get it (I think!). Possibly changing =E2=80=9Cmeet=E2=80=9D to =E2=
=80=9Chave met=E2=80=9D would have been<br>
&gt; enough to get me past my initial befuddlement.<br>
<br>
Yes, that&#39;s better.<br>
<br>
&gt;<br>
&gt; 10. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The criteria used to determine whether or not each =
link is symmetric<br>
&gt;=C2=A0 =C2=A0 =C2=A0is beyond the scope of the document.=C2=A0 For inst=
ance, intermediate<br>
&gt;<br>
&gt; Should be =E2=80=9Ccriterion =E2=80=A6 is beyond&quot;, or &quot;crite=
ria =E2=80=A6 are beyond&quot;, depending on<br>
&gt; whether you want singular or plural.<br>
We will use &quot;criteria =E2=80=A6 are beyond&quot;.<br>
<br>
&gt;<br>
&gt; 11. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 routers can use local information (e.g., bit rate, bandwi=
dth, number<br>
&gt;=C2=A0 =C2=A0 of cells used in 6tisch)<br>
&gt;<br>
&gt; I wouldn=E2=80=99t have minded a reference for 6tisch.<br>
No problem.<br>
<br>
&gt;<br>
&gt; 12. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Upon receiving a RREQ-DIO with the S bit set to 1, =
a node determines<br>
&gt;=C2=A0 =C2=A0 =C2=A0whether this one-hop link can be used symmetrically=
, i.e., both the<br>
&gt;=C2=A0 =C2=A0 =C2=A0two directions meet the requirements of data transm=
ission.=C2=A0 If the<br>
&gt;=C2=A0 =C2=A0 =C2=A0RREQ-DIO arrives over an interface that is not know=
n to be symmetric,<br>
&gt;=C2=A0 =C2=A0 =C2=A0or is known to be asymmetric, the S bit is set to 0=
.=C2=A0 If the S bit<br>
&gt;=C2=A0 =C2=A0 =C2=A0arrives already set to be &#39;0&#39;, it is set to=
 be &#39;0&#39; on retransmission<br>
&gt;<br>
&gt; The term =E2=80=9Cretransmission=E2=80=9D seems misused here. I guess =
you mean something like<br>
&gt; =E2=80=9Cwhen the RREQ-DIO is propagated=E2=80=9D.<br>
That is better.=C2=A0 We will use that.<br>
<br>
&gt;<br>
&gt; 13. Section 5:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Appendix A describes an example method using the upstream=
 Expected<br>
&gt;=C2=A0 =C2=A0 Number of Transmissions&quot; (ETX) and downstream Receiv=
ed Signal<br>
&gt;=C2=A0 =C2=A0 Strength Indicator (RSSI) to estimate whether the link is=
 symmetric<br>
&gt;=C2=A0 =C2=A0 in terms of link quality is given in using an averaging t=
echnique.<br>
&gt;<br>
&gt; This sentence needs a rewrite to make it grammatical. It works up unti=
l &quot;is<br>
&gt; given in using an averaging technique=E2=80=9D.<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Appendix A describes an example method using the u=
pstream Expected<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Number of Transmissions&quot; (ETX) and downstream=
 Received Signal<br>
=C2=A0=C2=A0=C2=A0=C2=A0 Strength Indicator (RSSI) to estimate whether the =
link is symmetric<br>
=C2=A0=C2=A0=C2=A0=C2=A0 in terms of link quality using an averaging techni=
que.<br>
<br>
<br>
&gt;<br>
&gt; 14. Section 6.2.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0If the S bit in the received RREQ-DIO is set=
 to 1, the router MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0determine whether each direction of the link=
 (by which the RREQ-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0DIO is received) satisfies the Objective Fun=
ction.=C2=A0 In case that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the downward (i.e. towards the TargNode) dir=
ection of the link<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0does not satisfy the Objective Function, the=
 link can&#39;t be used<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0symmetrically, thus the S bit of the RREQ-DI=
O to be sent out MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0be set as 0.=C2=A0 If the S bit in the recei=
ved RREQ-DIO is set to 0,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the router MUST determine into the upward di=
rection (towards the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0OrigNode) of the link.<br>
&gt;<br>
&gt; The last sentence doesn=E2=80=99t make sense.<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 ...=C2=A0 If the S bit in the received RREQ-DIO is set to 0=
,<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the router MUST determine the upward directi=
on (towards the<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 OrigNode) of the link.<br>
&gt;<br>
&gt; 15. Section 6.2.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0If the router is an intermediate router, the=
n it transmits a RREQ-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0DIO via link-local multicast;<br>
&gt;<br>
&gt; On what interface? Routers generally can have multiple interfaces. Aga=
in, this<br>
&gt; is a place a clear description of the network environment might have h=
elped.<br>
<br>
The link-local multicast should go out over all local interfaces.<br>
<br>
&gt;<br>
&gt; 16. Section 6.2.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 If the OrigNode tries to reach multiple TargNodes in a si=
ngle RREQ-<br>
&gt;=C2=A0 =C2=A0 Instance, one of the TargNodes can be an intermediate rou=
ter to the<br>
&gt;=C2=A0 =C2=A0 others, therefore it MUST continue sending RREQ-DIO to re=
ach other<br>
&gt;=C2=A0 =C2=A0 targets.=C2=A0 In this case, before rebroadcasting the RR=
EQ-DIO<br>
&gt;<br>
&gt; The use of the term =E2=80=9Cbroadcast=E2=80=9D here confuses me. Is t=
his =E2=80=9Cbroadcast=E2=80=9D in the RF<br>
&gt; sense? Again, this is a place a clear description of the network envir=
onment<br>
&gt; might have helped.<br>
This needs to be reformulated to avoid suggesting anything about RF <br>
broadcast.=C2=A0 TBD.<br>
<br>
&gt;<br>
&gt; 17. Section 6.2.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 send out any RREQ-DIO.=C2=A0 For the purposes of determin=
ing the<br>
&gt;=C2=A0 =C2=A0 intersection with previous incoming RREQ-DIOs, the interm=
ediate<br>
&gt;=C2=A0 =C2=A0 router maintains a record of the targets that have been r=
equested<br>
&gt;=C2=A0 =C2=A0 associated with the RREQ-Instance.=C2=A0 Any RREQ-DIO mes=
sage with<br>
&gt;=C2=A0 =C2=A0 different ART Options coming from a router with higher Ra=
nk is<br>
&gt;=C2=A0 =C2=A0 ignored.<br>
&gt;<br>
&gt; It=E2=80=99s not clear to me if the last sentence goes with the previo=
us and if so,<br>
&gt; how. Does it even relate to multiple targets? Also, different from wha=
t? If it<br>
&gt; has the same ART Options (same as what?) is it *not* ignored?<br>
How about:<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ..... =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 For the purposes of <br>
determining the<br>
=C2=A0=C2=A0 intersection with previous incoming RREQ-DIOs, the intermediat=
e<br>
=C2=A0=C2=A0 router maintains a record of the targets that have been reques=
ted<br>
=C2=A0=C2=A0 associated with the RREQ-Instance. Any incoming RREQ-DIO messa=
ge having<br>
=C2=A0=C2=A0 multiple ART Options coming from a router with higher Rank tha=
n the <br>
Rank of<br>
=C2=A0=C2=A0 the stored targets is ignored.<br>
<br>
&gt;<br>
&gt; 18. Section 6.3.1:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 implementation-specific and out of scope.=C2=A0 If the im=
plementation<br>
&gt;=C2=A0 =C2=A0 selects the symmetric route, and the L bit is not 0, the =
TargNode MAY<br>
&gt;=C2=A0 =C2=A0 delay transmitting the RREP-DIO for duration RREP_WAIT_TI=
ME to await<br>
&gt;=C2=A0 =C2=A0 a symmetric route with a lower Rank.=C2=A0 The value of R=
REP_WAIT_TIME is<br>
&gt;=C2=A0 =C2=A0 set by default to 1/4 of the time duration determined by =
the L bit.<br>
&gt;<br>
&gt; It=E2=80=99s not an L bit though, it=E2=80=99s an L field.<br>
Good point!<br>
<br>
&gt;<br>
&gt; 19. Section 6.3.2:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 multicast until the OrigNode is reached or MaxRank is exc=
eeded.=C2=A0 The<br>
&gt;=C2=A0 =C2=A0 TargNode MAY delay transmitting the RREP-DIO for duration=
<br>
&gt;=C2=A0 =C2=A0 RREP_WAIT_TIME to await a route with a lower Rank.=C2=A0 =
The value of<br>
&gt;=C2=A0 =C2=A0 RREP_WAIT_TIME is set by default to 1/4 of the time durat=
ion<br>
&gt;=C2=A0 =C2=A0 determined by the L bit.<br>
&gt;<br>
&gt; Again, it=E2=80=99s an L field. Also, what if L is zero? Is RREP_WAIT_=
TIME set to<br>
&gt; infinity, as the text implies?<br>
Thanks for pointing this out.=C2=A0 We need to be explicit about it.=C2=A0 =
I don&#39;t <br>
think the RREP_WAIT_TIME should ever be zero or infinity. But, if it <br>
were, the implementations would still be interoperable in a sense.=C2=A0 Do=
 <br>
we really want to get into exactly what wait times make sense in this <br>
context?<br>
<br>
<br>
&gt;<br>
&gt; Please do a global search for =E2=80=9CL bit=E2=80=9D, as there are ad=
ditional instances I<br>
&gt; haven=E2=80=99t called out.<br>
&gt;<br>
&gt; 20. Section 6.4:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 Step 4:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 If the receiver is the OrigNode, it can sta=
rt transmitting the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 application data to TargNode along the path=
 as provided in RREP-<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Instance, and processing for the RREP-DIO i=
s complete.=C2=A0 Otherwise,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 in case of an asymmetric route, the interme=
diate router MUST<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 include the address of the interface receiv=
ing the RREP-DIO into<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 the address vector, and then transmit the R=
REP-DIO via link-local<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 multicast.=C2=A0 In case of a symmetric rou=
te, the RREP-DIO message is<br>
&gt;<br>
&gt; As with #15: on what interface(s)?<br>
It should go out to all the neighbors over multiple interfaces if necessary=
.<br>
<br>
&gt;<br>
&gt; 21. Section 10:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 fake AODV-RPL route discoveries.=C2=A0 In this type of sc=
enario, RPL&#39;s<br>
&gt;=C2=A0 =C2=A0 preinstalled mode of operation, where the key to use for =
a P2P-RPL<br>
&gt;=C2=A0 =C2=A0 route discovery is preinstalled, SHOULD be used.<br>
&gt;<br>
&gt; What type of scenario is that?<br>
<br>
=C2=A0=C2=A0&quot;In this type of scenario&quot; -&gt; &quot;When rogue rou=
ters might be present&quot;<br>
<br>
&gt;<br>
&gt; 22. Appendix A:<br>
&gt;<br>
&gt; s/pakcet/packet/<br>
Check.<br>
&gt;<br>
&gt; 23. General remark:<br>
&gt;<br>
&gt; Although =E2=80=9Cacknowledgements=E2=80=9D isn=E2=80=99t a required s=
ection I was a little surprised<br>
&gt; not to encounter it, as it=E2=80=99s usually present. Your call of cou=
rse.<br>
Acknowledgements are due to a lot of people - thanks for the reminder!<br>
<br>
Naturally Yours,<br>
Charlie P.<br>
<br>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>

</blockquote></div>

--000000000000b5cec605d00fc772--


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From: John Scudder <jgs@juniper.net>
To: Ines Robles <mariainesrobles@googlemail.com>
CC: John Scudder via Datatracker <noreply@ietf.org>, Routing Over Low power and Lossy networks <roll@ietf.org>, The IESG <iesg@ietf.org>, roll-chairs <roll-chairs@ietf.org>, "draft-ietf-roll-aodv-rpl@ietf.org" <draft-ietf-roll-aodv-rpl@ietf.org>, Charlie Perkins <charles.perkins@earthlink.net>, Alvaro Retana <aretana.ietf@gmail.com>
Thread-Topic: [Roll] John Scudder's Discuss on draft-ietf-roll-aodv-rpl-10: (with DISCUSS and COMMENT)
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From nobody Tue Nov  9 01:50:56 2021
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Subject: [Roll] I-D Action: draft-ietf-roll-capabilities-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks WG of the IETF.

        Title           : RPL Capabilities
        Authors         : Rahul Arvind Jadhav
                          Pascal Thubert
                          Michael Richardson
                          Rabi Narayan Sahoo
	Filename        : draft-ietf-roll-capabilities-09.txt
	Pages           : 17
	Date            : 2021-11-09

Abstract:
   This draft enables the discovery, advertisement and query of
   capabilities for RPL nodes.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-roll-capabilities/

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From nobody Tue Nov  9 02:26:50 2021
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Subject: [Roll] I-D Action: draft-ietf-roll-mopex-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks WG of the IETF.

        Title           : Mode of Operation extension
        Authors         : Rahul Arvind Jadhav
                          Pascal Thubert
                          Michael Richardson
	Filename        : draft-ietf-roll-mopex-04.txt
	Pages           : 9
	Date            : 2021-11-09

Abstract:
   RPL allows different mode of operations which allows nodes to have a
   consensus on the basic primitives that must be supported to join the
   network.  The MOP field in [RFC6550] is of 3 bits and is fast
   depleting.  This document extends the MOP for future use.


The IETF datatracker status page for this draft is:
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Dear all,

Please find the complete set of the slides for today's meeting

https://datatracker.ietf.org/meeting/112/materials/slides-112-roll-ietf112-roll-completeset-01

Comments welcome,

Thanks,

Ines and Dominique

On Sun, Oct 31, 2021 at 9:25 PM Ines Robles <mariainesrobles@googlemail.com>
wrote:

> Dear all,
>
> Please find below the link to the ROLL Agenda for the IETF112,
>
> https://datatracker.ietf.org/meeting/112/materials/agenda-112-roll-02
>
> @Dear Presenters, please submit or send to us the slides in pdf format by
> 5th November.
>
> Comments welcome,
>
> Thank you,
>
> Ines and Dominique
>

--00000000000073d94105d06c4b4e
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Dear all,<br><div><br></div><div>Please f=
ind the complete set of the slides for today&#39;s meeting</div><div><br></=
div><div><a href=3D"https://datatracker.ietf.org/meeting/112/materials/slid=
es-112-roll-ietf112-roll-completeset-01">https://datatracker.ietf.org/meeti=
ng/112/materials/slides-112-roll-ietf112-roll-completeset-01</a><br></div><=
div><br></div><div>Comments welcome,</div><div><br></div><div>Thanks,</div>=
<div><br></div><div>Ines and Dominique</div></div><br><div class=3D"gmail_q=
uote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Oct 31, 2021 at 9:25 PM=
 Ines  Robles &lt;<a href=3D"mailto:mariainesrobles@googlemail.com">mariain=
esrobles@googlemail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div dir=3D"ltr">Dear all,<br><div><br></div><div>Pl=
ease find below the link to the ROLL Agenda for the IETF112,=C2=A0</div><di=
v><br></div><div><a href=3D"https://datatracker.ietf.org/meeting/112/materi=
als/agenda-112-roll-02" target=3D"_blank">https://datatracker.ietf.org/meet=
ing/112/materials/agenda-112-roll-02</a><br></div><div><br></div><div>@Dear=
 Presenters, please submit or send to us the slides in pdf=C2=A0format by 5=
th November.=C2=A0<br></div><div><br></div><div>Comments welcome,</div><div=
><br></div><div>Thank you,</div><div><br></div><div>Ines and Dominique</div=
></div>
</blockquote></div></div>

--00000000000073d94105d06c4b4e--


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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Wed, 10 Nov 2021 14:20:33 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/tVoayGKJao9FWi1WCTOa_qTrUvM>
Subject: [Roll] IETF 112 - Slides
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--000000000000d0a14b05d06e4246
Content-Type: text/plain; charset="UTF-8"

Dear all,

Please find an updated version of the slides

https://datatracker.ietf.org/meeting/112/materials/slides-112-roll-ietf112-roll-completeset-02

BR,
Ines

On Wed, Nov 10, 2021 at 11:59 AM Ines Robles <mariainesrobles@googlemail.com>
wrote:

> Dear all,
>
> Please find the complete set of the slides for today's meeting
>
>
> https://datatracker.ietf.org/meeting/112/materials/slides-112-roll-ietf112-roll-completeset-01
>
> Comments welcome,
>
> Thanks,
>
> Ines and Dominique
>
> On Sun, Oct 31, 2021 at 9:25 PM Ines Robles <
> mariainesrobles@googlemail.com> wrote:
>
>> Dear all,
>>
>> Please find below the link to the ROLL Agenda for the IETF112,
>>
>> https://datatracker.ietf.org/meeting/112/materials/agenda-112-roll-02
>>
>> @Dear Presenters, please submit or send to us the slides in pdf format by
>> 5th November.
>>
>> Comments welcome,
>>
>> Thank you,
>>
>> Ines and Dominique
>>
>

--000000000000d0a14b05d06e4246
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Dear all,<br><div><br></div><div>Please f=
ind an updated version of the slides</div><div><br></div><div><a href=3D"ht=
tps://datatracker.ietf.org/meeting/112/materials/slides-112-roll-ietf112-ro=
ll-completeset-02">https://datatracker.ietf.org/meeting/112/materials/slide=
s-112-roll-ietf112-roll-completeset-02</a><br></div><div><br></div><div>BR,=
</div><div>Ines=C2=A0</div></div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr">On Wed, Nov 10, 2021 at 11:59 AM Ines  Robles &l=
t;<a href=3D"mailto:mariainesrobles@googlemail.com">mariainesrobles@googlem=
ail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr"><div dir=3D"ltr">Dear all,<br><div><br></div><div>P=
lease find the complete set of the slides for today&#39;s meeting</div><div=
><br></div><div><a href=3D"https://datatracker.ietf.org/meeting/112/materia=
ls/slides-112-roll-ietf112-roll-completeset-01" target=3D"_blank">https://d=
atatracker.ietf.org/meeting/112/materials/slides-112-roll-ietf112-roll-comp=
leteset-01</a><br></div><div><br></div><div>Comments welcome,</div><div><br=
></div><div>Thanks,</div><div><br></div><div>Ines and Dominique</div></div>=
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun=
, Oct 31, 2021 at 9:25 PM Ines  Robles &lt;<a href=3D"mailto:mariainesroble=
s@googlemail.com" target=3D"_blank">mariainesrobles@googlemail.com</a>&gt; =
wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=
=3D"ltr">Dear all,<br><div><br></div><div>Please find below the link to the=
 ROLL Agenda for the IETF112,=C2=A0</div><div><br></div><div><a href=3D"htt=
ps://datatracker.ietf.org/meeting/112/materials/agenda-112-roll-02" target=
=3D"_blank">https://datatracker.ietf.org/meeting/112/materials/agenda-112-r=
oll-02</a><br></div><div><br></div><div>@Dear Presenters, please submit or =
send to us the slides in pdf=C2=A0format by 5th November.=C2=A0<br></div><d=
iv><br></div><div>Comments welcome,</div><div><br></div><div>Thank you,</di=
v><div><br></div><div>Ines and Dominique</div></div>
</blockquote></div></div>
</blockquote></div></div>

--000000000000d0a14b05d06e4246--


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From: <dominique.barthel@orange.com>
To: roll <roll@ietf.org>
Thread-Topic: notetakers for IETF 112 ROLL session
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "pim@ietf.org" <pim@ietf.org>
CC: "ROLL WG (roll@ietf.org)" <roll@ietf.org>, "6lo@ietf.org" <6lo@ietf.org>
Thread-Topic: Heads-up on draft-ietf-6lo-multicast-registration
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Subject: [Roll] Heads-up on draft-ietf-6lo-multicast-registration
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Dear all:

With draft-ietf-6lo-multicast-registration, 6lo is extending the IPv6 state=
ful address autoconfiguration (RFC 8505/8928) to express that the node is a=
ccepting traffic for an anycast address and to subscribe to multicast addre=
sses.

The model is a proactive push from the device, compared to MLD reports that=
 pulls from the router. There are a number for reasons for doing this that =
way in energy conscious networks, where multicast and broadcasts are mostly=
 prohibited, and devices sleep most of their time. Also the incremental cod=
e on constrained devices that operate IPv6 ND as per RFC 8505 is very minim=
al.

The proactive model allows the router to inject the MAC and IP information =
in a network overlay routing or a proxy function in a fashion that is more =
reliable and economical than the classical snooping of MLD and ND. This is =
why it is used in RFC 8929 for proxy ND, and proposed for use in RIFT and n=
ow eVPN as the IGP-agnostic UNI between the host and the router.=20

Since we are extending the registration from unicast to anycast and multica=
st, Erik and Alvaro suggested that we raise the topic on this list as well.=
=20

I would certainly be happy to help folks are interesting in drafting how su=
bscriptions learned from this new work can be injected in PIM as well.

Keep safe;

Pascal


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Subject: [Roll] review of dao-projection -21
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Rahul and I (via hypothys.is) want to know why "anistropic" was part of the=
 introduction
sentence.  It's not wrong, but it seems funny to suddenly have this so
prominent.

I have made a number of editorial suggestions, most are typos, some word
re-ordering, which I put into: https://github.com/roll-wg/dao-projection/pu=
ll/10
rather than bore you with minutia.

On the whole, the document is much improved, but I think that it still needs
some significant rework.

You might want to consider upgrading to kramdown for your source, and then
change your ascii art to something goat can upgrade to SVG.
  https://github.com/blampe/goat

A major issue for me is how things get turned on.
Does this document wait for capex?  probably?  I know that I'm probably the
slow/weak link in the capex chain.

The intro paragraph:
  > With this specification, a Path Computation Element [PCE] in an external
  > controller interacts with the RPL Root to compute centrally shorter Peer
  > to Peer (P2P) paths within a pre-existing RPL Main DODAG. The topologic=
al
  > information that is passed to the PCE is derived from the DODAG that is
  > already available at the Root in RPL Non-Storing Mode. This specificati=
on
  > introduces protocol extensions that enrich the topological information
  > that is available at the Root and passed to the PCE.

and I am concerned about the emphasis on PCE.   Of course, we can support
offloading to a PCE.  But, we don't have to, do we?
As far as I understand it, the PCE/DODAG-Root protocol is yet-to-be-standar=
dized.
What we are standardizing is Root->6LR communication.
I will suggest some text after my read-through.  What I don't want is for
someone to read the intro, say, "I don't have a PCE, so I can't use this"

The document says, "Root or an associated PCE " a few times, so maybe we
could just call it the "P-DAO engine" or something like that.


_Domain Terms_
Terminology for path.  Maybe don't "", since there is an embedded "path".
            maybe just indent?

Maybe, instead of trying to make a definition list for this section, make
subsections, because I think that each term here actually requires more than
a sentence.

_subTrack_ or sub-track?
  1) Not fond of camelcase in specifications.
  2) too much definition here.  Supports above suggest to make these sub-se=
ctions.

Probably need to define what is East-West before we use it.

What is "routing stretch"?

section 3.2:
  } Packets flow via the common parent and the routing stretch is reduced
  } vs. Non-Storing, for a better P2P connectivity, while the internet
  } connectivity is restored more slowly, time for the DV operation to oper=
ate
  } hop-by-hop.

Too many thoughts in the same sentence.  Could be a word missing?
I think that I understand Storing is better for P2P connectivity, but the
other thought about connectivity is lost in the mix.

section 3.3.1:

 } It results that the Root, or then some associated centralized computation
 } engine such as a PCE, can determine the amount of packets that reach a
 } destination in the RPL domain, and thus the amount of energy and bandwid=
th
 } that is wasted for transmission, between itself and the destination, as =
well
 } as the risk of fragmentation, any potential delays because of a paths lo=
nger
 } than necessary (shorter paths exist that would not traverse the Root).

I tried to re-write this, putting a period after "RPL domain", but what was
left over didn't make sense.  Please rewrite with shorter sentences.

section 3.3.2, is "INternet" capitalized like this for a reason?

The diagram in section 3.3.2 would be a good SVG candidate.
Have you tried "goat"?

"The amount of stretch depends on the Mode of Operation:"
add reference RFC9008?

section 3.4:
"so-called Track Legs" ... I think the terminology says they are called Tra=
ck
Legs, so I think "so-called" is unneeded text.
(ps: so now I have ZZtop in my head:
https://www.youtube.com/watch?v=3DeUDcTLaWJuo )

"With this specification, a Track forms DODAG that is directed towards a
Track Ingress."

There is perhaps a word missing ("a DODAG"?), but even with the article, I
don't understand what this means.

Overall, I think that I need a gentler introduction to Segments, Legs, Track
Legs.  I think that section 3.4 needs a diagram for examples, such as those
which were in the presentations that we had.  There are diagrams in 3.5, but
I think that maybe section 3.4/3.5 needs to be reworked so that the
definitions come out with the diagrams.

The last two paragraphs of 3.4 are about how Tracks are indexed.
I think that section should be a new section.
The different cases in the last paragraph need to be subsubsections so that
they can be referred to.

"stitching" point... needs a definition, I think.

I didn't find table 2 (RIB setting) useful without a better diagram to atta=
ch
the information to.   InstanceID 129 just pops up, and I'm not sure exactly=
 why.

section 3.5.1.1 and 3.5.1.2 are different examples, I suggest that the P-DAO
messages are numbered differently. (1,2,3) and (4,5,6).
I would understand this only by getting out paper and coloured pens and
reading each word carefully.  I think it needs to be a bit easier to unders=
tand.

section 3.6 at the end, *detnet* appears, and this is surprising.
I think section 3.6 should be 4.0, or maybe before section 8.

section 4.1:
"A new P-DAO Request (PDR) message (see Section 5.1) enables a Track Ingress
to request the Track from the __Root for which it is the Root__ and it owns=
 the
address that serves as TrackID, as well as the associated namespace from
which it selects the TrackID."

too long sentence, and I can't understand the __middle__ part.

I suggest section 4 identify when it Updates, whether it is Amending,
See-Also or Extending.  4.1.1. is, for instance, Extends.
Whereas the last paragraph of 4.1 is Amends.
I think that section 4.1.1 should just tell us about P-DAO, not define it.
I was expecting section 5 to define it.
Last paragraph of 4.1.1 is about TIO/RIO, and deserves it's own Amends
section.

section 6.
The PDR message came as a surprise. Probably I wasn't paying attention.
I think that the Root sends a P-DAO, and then the node in question replies
with a PDR as a maintenance function.  A kind of 3-way handshake on creating
the track, I think.
I think that the 3-way-ness of this should be in the intro.

Figure 14: I think a better diagram is needed, rather than repeating the LLN
diagram.

section 6.4:
  The SRH-6LoRH with the Via Addresses in the NSM-VIO are not needed and MU=
ST be omitted.
=2D>
  The SRH-6LoRH with the Via Addresses in the NSM-VIO are not needed and MU=
ST
  be ignored by the receiver.

(I always prefer to tell the receiver what to discard, rather than tell the
sender what to omit)

6.5.2:
        "It makes sense to add a new Leg before removing one that is
        misbehaving, and switch to the new Leg before removing the old. "

does it? if the old one is misbehaving, wouldn't removing it send traffic u=
p to
the root (according to non-optimized flow), allowing traffic to flow rather
than get dropped?  yes, there are some cases where this doesn't work.

section 6.6:
        "When forwarding a packet to a destination for which a router
        determines that routing happens via a Track for which it is Ingress=
,"

can you reword?  Sounds like the Marx Brothers sketch about a the party of =
the
first party... (_A Day at the Races_)

I think that the MTU statement deserves its own section, probably in sectio=
n 4.

section 7: how are the extra DAOs turned on in storing mode?
        CAPEX seems to be in order here?

section 8: i like these profiles.  We do need diagrams.
        (again, SVG and goat may be very nice to use)
Do the profiles need to be announced in some place in the protocol?

section 9: I don't think that the new risk for forged P-DAOs is adequately
        explained.   Can we at least authenticate P-DAO messages because th=
ey
        come from the Root? Sometimes the Root IP address is the same as th=
e DODAGID.
        (but not always? I forget)


I would like to see some section that explains the additions/changes *just*
from the 6LR point of view.  What new attributes need to be added to the
routes?  Most of the data path stuff is, I think, longest prefix match,
and then possible encapsulation.  RFC9008 probably has provided all the
primitives.  (I hope!)
But, I'd like to see a state machine of sorts that relates the P-DAO,
DAO-ACK and PDR/PDR-ACK messages.
I fear that the SHOULD/MUSTs/new-ICMPs messages are too spread over the
document.

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide





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Pascal Thubert \(pthubert\) <pthubert=3D40cisco.com@dmarc.ietf.org> wrote:
    > The term anisotropic came up mostly in the elaboration of RIFT, which
    > inherits that design property from RPL. The term has been used there
    > for a while and it seemed fair to give it back to the protocol that
    > introduced it.

I don't think we were disagreeing with the term, we just weren't sure why it
was important to mention it now.   You've explained that, so good!

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide





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The document has come a long way and limiting it to certain modes (such as
using strictly NSM for base/main MOP) has done a lot to simplify things.

Following is my review:

1. In all the subsections of 3.5.1 ... there is a statement that "From
Neighbor Cache Entry: C delivers the packet to F.". I believe it should be
"E delivers the packet to F". This stmt is in subsection 3.5.1.1/2/3

I very much like section 3.5.1 and its subsections. These subsections have
made understanding the draft much easier.

2. Apart from Path, Track, subTrack, Segment, there are few other terms
used ... "Legs" used in Section 3.6 (also elsewhere) and "Section" used in
Section 6.5.
In section 3.6, the term Legs seems to be indicating the same as Path,
i.e., multiple paths/legs can be combined to form a Track. In some other
places (section 4.1.2), the usage of leg is more closer to Track then paths.
In section 6.5 there is a statement, "This is ensured by installing
the new section
from its last node..." .. Is the section the same as the segment here?

3. The term "namespace" is used multiple times in the document. I
believe it relates to the scope of the TrackID .. It would be better to
define it explicitly. RPL does not use that term.

4. Section 4.1.1 specifies, "This specification generalizes the case of a
parent that can be used to reach a child with that of a whole Track through
which children and siblings of the Track Egress are reachable."
I am not sure if I follow this.

5. In general the document does not seem to be considering backward
compatibility with respect to new changes in RPI P flag, new messages added
etc. Or am I wrong? Is section 8 "Profiles" supposed to take care of
compatibility?

6. In Section 5.4: What exactly is the Step of Rank? Is it:

   1. Difference between the rank of this node and the sibling?
      2. DAGRank() as computed in Section 3.5.1 in RFC 6550? This needs to
      be explained with an example.

Thank you for clarifying the term Anisotropic. Works great in the RPL
context.

Thanks,
Rahul

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif;color:#20124d">The document has come a long way and limiting it =
to certain modes (such as using strictly NSM for base/main MOP) has done a =
lot to simplify things.<br></div><div class=3D"gmail_default" style=3D"font=
-family:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_def=
ault" style=3D"font-family:verdana,sans-serif;color:#20124d">Following is m=
y review:</div><div class=3D"gmail_default" style=3D"font-family:verdana,sa=
ns-serif;color:#20124d"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:verdana,sans-serif;color:#20124d">1. In all the subsections of 3.5=
.1 ... there is a statement that &quot;From Neighbor Cache Entry: C deliver=
s the packet to F.&quot;. I believe it should be=C2=A0 &quot;E delivers the=
 packet to F&quot;. This stmt is in subsection <a href=3D"http://3.5.1.1/2/=
3">3.5.1.1/2/3</a></div><div class=3D"gmail_default" style=3D"font-family:v=
erdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:verdana,sans-serif;color:#20124d">I very much like sectio=
n 3.5.1 and its subsections. These subsections have made understanding the=
=C2=A0draft much easier.</div><div class=3D"gmail_default" style=3D"font-fa=
mily:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:verdana,sans-serif;color:#20124d">2. Apart from Pat=
h, Track, subTrack, Segment, there are few other terms used ... &quot;Legs&=
quot; used in Section 3.6 (also elsewhere) and &quot;Section&quot; used in =
Section 6.5.</div><div class=3D"gmail_default" style=3D"font-family:verdana=
,sans-serif;color:#20124d">In section 3.6, the term Legs seems to be indica=
ting the same as Path, i.e., multiple paths/legs can be combined to form a =
Track. In some other places (section 4.1.2), the usage of leg is more close=
r to Track then paths.</div><div class=3D"gmail_default" style=3D"font-fami=
ly:verdana,sans-serif;color:#20124d">In section 6.5 there is a statement, &=
quot;<span style=3D"font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,=
34)">This is ensured by installing the new</span><span style=3D"font-family=
:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">=C2=A0section from its las=
t node...&quot; .. Is the section the same as the segment here?</span></div=
><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color=
:#20124d"><span style=3D"font-family:Arial,Helvetica,sans-serif;color:rgb(3=
4,34,34)"><br></span></div><div class=3D"gmail_default" style=3D"font-famil=
y:verdana,sans-serif;color:#20124d">3. The term &quot;namespace&quot; is=C2=
=A0used multiple times in the document. I believe=C2=A0it relates to the sc=
ope=C2=A0of the TrackID .. It would be better to define it explicitly. RPL =
does not use that term.</div><div class=3D"gmail_default" style=3D"font-fam=
ily:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_default=
" style=3D"font-family:verdana,sans-serif;color:#20124d">4. Section 4.1.1 s=
pecifies, &quot;<span style=3D"font-family:Arial,Helvetica,sans-serif;color=
:rgb(34,34,34)">This specification generalizes the</span><span style=3D"fon=
t-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">=C2=A0case of a pa=
rent that can be used to reach a child with that of a</span><span style=3D"=
font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">=C2=A0whole Tra=
ck through which children and siblings of the Track Egress</span><span styl=
e=3D"font-family:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">=C2=A0are =
reachable.&quot;</span></div><div class=3D"gmail_default" style=3D"font-fam=
ily:verdana,sans-serif;color:#20124d"><span style=3D"font-family:Arial,Helv=
etica,sans-serif;color:rgb(34,34,34)">I am not sure if I follow this.=C2=A0=
</span></div><div class=3D"gmail_default" style=3D"font-family:verdana,sans=
-serif;color:#20124d"><span style=3D"font-family:Arial,Helvetica,sans-serif=
;color:rgb(34,34,34)"><br></span></div><div class=3D"gmail_default" style=
=3D"font-family:verdana,sans-serif;color:#20124d"><span style=3D"font-famil=
y:Arial,Helvetica,sans-serif;color:rgb(34,34,34)">5. In general the documen=
t does not seem to be considering backward compatibility with respect to ne=
w changes in RPI P flag,=C2=A0new messages added etc. Or am I wrong? Is sec=
tion 8 &quot;Profiles&quot; supposed to take care of compatibility?</span><=
/div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;c=
olor:#20124d"><span style=3D"font-family:Arial,Helvetica,sans-serif;color:r=
gb(34,34,34)"><br></span></div><div class=3D"gmail_default" style=3D"font-f=
amily:verdana,sans-serif;color:#20124d"><span style=3D"font-family:Arial,He=
lvetica,sans-serif;color:rgb(34,34,34)">6. In Section 5.4:=C2=A0</span><spa=
n style=3D"color:rgb(32,32,32);font-family:&quot;Helvetica Neue&quot;,Helve=
tica,Arial,&quot;Lucida Grande&quot;,sans-serif;font-size:13px">What exactl=
y is the Step of Rank? Is it:</span></div><ol style=3D"box-sizing:border-bo=
x;margin:0.618em 0px;padding:0px;border:0px;list-style-position:inside;colo=
r:rgb(32,32,32);font-family:&quot;Helvetica Neue&quot;,Helvetica,Arial,&quo=
t;Lucida Grande&quot;,sans-serif;font-size:13px"><ol><li style=3D"box-sizin=
g:border-box;margin:0px 0px 0.291em;padding:0px;border:0px;line-height:1.3"=
><span class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;colo=
r:rgb(32,18,77)"></span>Difference between the rank of this node and the si=
bling?</li><li style=3D"box-sizing:border-box;margin:0px 0px 0.291em;paddin=
g:0px;border:0px;line-height:1.3">DAGRank() as computed in Section 3.5.1 in=
 RFC 6550? This needs to be explained with an example.</li></ol></ol><span =
style=3D"color:rgb(32,32,32);font-family:&quot;Helvetica Neue&quot;,Helveti=
ca,Arial,&quot;Lucida Grande&quot;,sans-serif;font-size:13px"><span class=
=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,=
77)"><div>Thank you for clarifying the term Anisotropic. Works great in the=
 RPL context.=C2=A0</div><div><br></div><div>Thanks,<br></div></span></span=
><div><span style=3D"color:rgb(32,32,32);font-family:&quot;Helvetica Neue&q=
uot;,Helvetica,Arial,&quot;Lucida Grande&quot;,sans-serif;font-size:13px"><=
span class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:=
rgb(32,18,77)">Rahul</span></span><span class=3D"gmail_default" style=3D"co=
lor:rgb(32,18,77);font-family:verdana,sans-serif;font-size:13px"></span><sp=
an style=3D"color:rgb(32,18,77);font-family:verdana,sans-serif;font-size:13=
px"></span></div></div>

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To: roll@ietf.org
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I'm trying to edit draft-ietf-roll-enrollment-priority to reflect the WG
consensus.

I think that we agreed that the nodes within the DODAG should not change
their enrollment priority.  It can be set by the root in it's DIO, and it
will propogate through the DODAG according to the normal trickle settings.
Changes to the priority will *not*(?!) reset the trickle timer.

https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9 is the
pull request I just made, which may be easier to see the changes.

specifically, I've deleted this line:

https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9/files=
#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca4061faL169

   The nodes then adjust this base value based upon their observed
   congestion, emitting their adjusted DIO value to their children.

I actually find that there isn't a lot else to delete.

I am concerned that I did not understand the WG consensus correctly, so I am
have not yet published this version.

Do we want to retain the ability for the root to send a value 0-0x7f into t=
he DODAG,
or was it only 0 and 1 that were useful?

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide

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From nobody Mon Nov 22 06:55:22 2021
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Subject: Re: [Roll] enrollment priority
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Hi Michael,

As we discussed throughout the mailing list, we also need a sequence 
number so that correct values of DODAG_Size and min_priority are 
adopted. This in turn requires putting more information in the draft on 
the rules of adopting the values. They are explicitly formulated in my 
earlier e-mail about GLOBAL vs FLEXIBLE.

Take care,
-- 
- Konrad Iwanicki.

On 22/11/2021 15:15, Michael Richardson wrote:
> 
> I'm trying to edit draft-ietf-roll-enrollment-priority to reflect the WG
> consensus.
> 
> I think that we agreed that the nodes within the DODAG should not change
> their enrollment priority.  It can be set by the root in it's DIO, and it
> will propogate through the DODAG according to the normal trickle settings.
> Changes to the priority will *not*(?!) reset the trickle timer.
> 
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9 is the
> pull request I just made, which may be easier to see the changes.
> 
> specifically, I've deleted this line:
> 
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9/files#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca4061faL169
> 
>     The nodes then adjust this base value based upon their observed
>     congestion, emitting their adjusted DIO value to their children.
> 
> I actually find that there isn't a lot else to delete.
> 
> I am concerned that I did not understand the WG consensus correctly, so I am
> have not yet published this version.
> 
> Do we want to retain the ability for the root to send a value 0-0x7f into the DODAG,
> or was it only 0 and 1 that were useful?
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
>             Sandelman Software Works Inc, Ottawa and Worldwide
> 
> 
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
> 


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>, "Michael Richardson" <mcr+ietf@sandelman.ca>
Thread-Topic: [Roll] review of dao-projection -21
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Subject: Re: [Roll] review of dao-projection -21
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From: <dominique.barthel@orange.com>
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Thread-Topic: IETF112 ROLL minutes posted
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Hi all,

We have posted minutes for our IETF112 ROLL session.
https://datatracker.ietf.org/doc/minutes-112-roll/
Please have a look and report anything missing/incorrect by Dec 10th.
We will post the final minutes by Dec 17th.
Thanks!

Dominique



___________________________________________________________________________=
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<p class=3D"MsoNormal">Hi all,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">We have posted minutes for our =
IETF112 ROLL session.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://datatracker.=
ietf.org/doc/minutes-112-roll/">https://datatracker.ietf.org/doc/minutes-11=
2-roll/</a>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Please have a look and report a=
nything missing/incorrect by Dec 10th.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">We will post the final minutes =
by Dec 17<sup>th</sup>.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dominique <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

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</PRE></body>
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From: Rahul Jadhav <rahul.ietf@gmail.com>
Date: Tue, 23 Nov 2021 09:05:18 +0530
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Subject: Re: [Roll] enrollment priority
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Hey Michael,

Please find my review of the updates inline in the github PR
<https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9>.
Few other comments inline below.

Regards,
Rahul

On Mon, 22 Nov 2021 at 19:45, Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> I'm trying to edit draft-ietf-roll-enrollment-priority to reflect the WG
> consensus.
>
> I think that we agreed that the nodes within the DODAG should not change
> their enrollment priority.  It can be set by the root in it's DIO, and it
> will propogate through the DODAG according to the normal trickle settings=
.
> Changes to the priority will *not*(?!) reset the trickle timer.
>

Not resetting trickle timer has impact. It could take several hours for the
updated option to percolate downstream in the network. I just wanted to say
it loud here.


>
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9 is
> the
> pull request I just made, which may be easier to see the changes.
>
> specifically, I've deleted this line:
>
>
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9/fil=
es#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca4061faL16=
9
>
>    The nodes then adjust this base value based upon their observed
>    congestion, emitting their adjusted DIO value to their children.
>
> I actually find that there isn't a lot else to delete.
>
> I am concerned that I did not understand the WG consensus correctly, so I
> am
> have not yet published this version.
>
> Do we want to retain the ability for the root to send a value 0-0x7f into
> the DODAG,
> or was it only 0 and 1 that were useful?
>

The Root should have the ability to send any value into the DODAG. If Root
is limited to value 0/1 and if it is not possible for any 6LRs to update
the value then we might as well restrict the parameter size to 1 bit! Am I
missing anything here?



>
> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consul=
ting )
>            Sandelman Software Works Inc, Ottawa and Worldwide
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
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Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:verdana,sans-serif;color:#20124d">Hey Michael,</div><div class=3D"=
gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;c=
olor:#20124d">Please find my review of the updates inline in the <a href=3D=
"https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9">git=
hub PR</a>.</div><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif;color:#20124d">Few other comments inline below.</div><div class=
=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d"><=
br></div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-ser=
if;color:#20124d">Regards,</div><div class=3D"gmail_default" style=3D"font-=
family:verdana,sans-serif;color:#20124d">Rahul</div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, 22 Nov 2021 at =
19:45, Michael Richardson &lt;<a href=3D"mailto:mcr%2Bietf@sandelman.ca">mc=
r+ietf@sandelman.ca</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><br>
I&#39;m trying to edit draft-ietf-roll-enrollment-priority to reflect the W=
G<br>
consensus.<br>
<br>
I think that we agreed that the nodes within the DODAG should not change<br=
>
their enrollment priority.=C2=A0 It can be set by the root in it&#39;s DIO,=
 and it<br>
will propogate through the DODAG according to the normal trickle settings.<=
br>
Changes to the priority will *not*(?!) reset the trickle timer.<br></blockq=
uote><div><br></div><div><div class=3D"gmail_default" style=3D"font-family:=
verdana,sans-serif;color:rgb(32,18,77)">Not resetting=C2=A0trickle timer ha=
s impact. It could take several hours for the updated=C2=A0option to percol=
ate downstream in the network. I just wanted to say it loud here.</div></di=
v><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<a href=3D"https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/p=
ull/9" rel=3D"noreferrer" target=3D"_blank">https://github.com/roll-wg/draf=
t-ietf-roll-enrollment-priority/pull/9</a> is the<br>
pull request I just made, which may be easier to see the changes.<br>
<br>
specifically, I&#39;ve deleted this line:<br>
<br>
<a href=3D"https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/p=
ull/9/files#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca=
4061faL169" rel=3D"noreferrer" target=3D"_blank">https://github.com/roll-wg=
/draft-ietf-roll-enrollment-priority/pull/9/files#diff-fe544a5ddaac2d404d7b=
76aa1204d54e36f5eb6618f3f52f0c0dc56dca4061faL169</a><br>
<br>
=C2=A0 =C2=A0The nodes then adjust this base value based upon their observe=
d<br>
=C2=A0 =C2=A0congestion, emitting their adjusted DIO value to their childre=
n.<br>
<br>
I actually find that there isn&#39;t a lot else to delete.<br>
<br>
I am concerned that I did not understand the WG consensus correctly, so I a=
m<br>
have not yet published this version.<br>
<br>
Do we want to retain the ability for the root to send a value 0-0x7f into t=
he DODAG,<br>
or was it only 0 and 1 that were useful?<br></blockquote><div><br></div><di=
v><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;colo=
r:rgb(32,18,77)">The Root should have the ability to send any value into th=
e DODAG. If Root is limited to value 0/1 and if it is not possible for any =
6LRs to update the value then we might as well restrict the parameter size =
to 1 bit! Am I missing anything here?</div><br></div><div>=C2=A0</div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">
<br>
--<br>
Michael Richardson &lt;<a href=3D"mailto:mcr%2BIETF@sandelman.ca" target=3D=
"_blank">mcr+IETF@sandelman.ca</a>&gt;=C2=A0 =C2=A0. o O ( IPv6 I=C3=B8T co=
nsulting )<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Sandelman Software Works Inc, Otta=
wa and Worldwide<br>
_______________________________________________<br>
Roll mailing list<br>
<a href=3D"mailto:Roll@ietf.org" target=3D"_blank">Roll@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/roll" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/roll</a><br>
</blockquote></div></div>

--000000000000d195fa05d16c6e26--


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>, "Michael Richardson" <mcr+ietf@sandelman.ca>
Thread-Topic: [Roll] enrollment priority
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Date: Tue, 23 Nov 2021 05:49:45 +0000
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Subject: Re: [Roll] enrollment priority
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From nobody Tue Nov 23 01:00:41 2021
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To: Routing Over Low power and Lossy networks <roll@ietf.org>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>, Michael Richardson <mcr+ietf@sandelman.ca>
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From: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
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Subject: Re: [Roll] enrollment priority
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Hi all,

On 23/11/2021 06:49, Pascal Thubert (pthubert) wrote:
> Hello Michael
> 
> Please see https://datatracker.ietf.org/doc/minutes-interim-2021-roll-02-202108311800/
> 
> We agreed that:
> - as Konrad says again here we need a new lollipop counter
> - as Rahul points out in his review the min priority is propagated unchanged in DIOs, what I understand Konrad calls GLOBAL
> - as Huimin said on Aug 19th we must define the behavior of the node, which logic to use to increment the minimum priority from the DIO to place in the beacon.
> 
> GLOBAL vs FLEXIBLE was discussed, and I answered Konrad about the FLEXIBLE on Aug. 12th (https://mailarchive.ietf.org/arch/msg/roll/2MaZ4wXLVzJbmLC-LO6c--DsbWQ/)
> I do not see a use case for it, so it looks like overdesign but I'm open to be convinced otherwise

Precisely, we agreed on what I call GLOBAL. In addition, from the 
discussion in my e-mail, there are two additional issues outstanding 
(one was mentioned by Michael). I believe we did not come to a 
conclusion regarding them:

- How do changes to min priority (and OSN) affect DIO Trickle timers? 
[OSN == the lollipop sequence counter]

- How does a (temporal) lack of a preferred parent affect the proxy 
priority of the node in EBs (and in general, the node's behavior)?

Best,
-- 
- Konrad Iwanicki.

>> -----Original Message-----
>> From: Roll <roll-bounces@ietf.org> On Behalf Of Konrad Iwanicki
>> Sent: lundi 22 novembre 2021 15:55
>> To: Routing Over Low power and Lossy networks <roll@ietf.org>; Michael
>> Richardson <mcr+ietf@sandelman.ca>
>> Subject: Re: [Roll] enrollment priority
>>
>> Hi Michael,
>>
>> As we discussed throughout the mailing list, we also need a sequence number
>> so that correct values of DODAG_Size and min_priority are adopted. This in
>> turn requires putting more information in the draft on the rules of
>> adopting the values. They are explicitly formulated in my earlier e-mail
>> about GLOBAL vs FLEXIBLE.
>>
>> Take care,
>> --
>> - Konrad Iwanicki.
>>
>> On 22/11/2021 15:15, Michael Richardson wrote:
>>>
>>> I'm trying to edit draft-ietf-roll-enrollment-priority to reflect the
>>> WG consensus.
>>>
>>> I think that we agreed that the nodes within the DODAG should not
>>> change their enrollment priority.  It can be set by the root in it's
>>> DIO, and it will propogate through the DODAG according to the normal
>> trickle settings.
>>> Changes to the priority will *not*(?!) reset the trickle timer.
>>>
>>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9
>>> is the pull request I just made, which may be easier to see the changes.
>>>
>>> specifically, I've deleted this line:
>>>
>>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9/
>>> files#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca4
>>> 061faL169
>>>
>>>      The nodes then adjust this base value based upon their observed
>>>      congestion, emitting their adjusted DIO value to their children.
>>>
>>> I actually find that there isn't a lot else to delete.
>>>
>>> I am concerned that I did not understand the WG consensus correctly,
>>> so I am have not yet published this version.
>>>
>>> Do we want to retain the ability for the root to send a value 0-0x7f
>>> into the DODAG, or was it only 0 and 1 that were useful?
>>>
>>> --
>>> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting
>> )
>>>              Sandelman Software Works Inc, Ottawa and Worldwide
>>>
>>>
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
> 


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To: "Pascal Thubert \(pthubert\)" <pthubert@cisco.com>, Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] review of dao-projection -21
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Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    >> Rahul and I (via hypothys.is) want to know why "anistropic" was part=
 of
    >> the introduction sentence.  It's not wrong, but it seems funny to
    >> suddenly have this so prominent.

    > I opened a separate thread for this. What is hypothys.is ?

A group commenting system that Rahul and I happen to both use.
(Who remembers Netscape Group Annotations?... )

    >> You might want to consider upgrading to kramdown for your source, and
    >> then change your ascii art to something goat can upgrade to SVG.
    >> https://github.com/blampe/goat

    > I'm not that fond of kramdown, that's an extra step for me, and I use=
 it when I must.
    > Goat seems orthogonal, I love it but lack time for fun to learn throu=
gh the IETF procedure.
    > Look at https://www.ietf.org/archive/id/draft-ietf-rift-rift-13.pdf; =
good yes, perfect, no. Worth the effort ?

Yes, worth the effort.
Goat lets you write ASCII art in a slightly restricted way, and it upgrades
it to SVG.  The reason to use kramdown here is only because it manages that
for you.

    >> A major issue for me is how things get turned on.
    >> Does this document wait for capex?  probably?  I know that I'm proba=
bly
    >> the slow/weak link in the capex chain.

    > It would have largely benefitted from capex if capex was there.
    > For now it will be configuration / management.

So I can use it only after I know that all nodes support it.

    > See section 3.7 "

    > The "6TiSCH Architecture" [6TiSCH-ARCHI] leverages a centralized
    > model that is similar to that of "Deterministic Networking
    > Architecture" [RFC8655], whereby the device resources and
    > capabilities are exposed to an external controller which installs
    > routing states into the network based on its own objective functions
    > that reside in that external entity.
    > "

    > The management magic tells the root which node supports this and their
    > capacity. It's all done outside RPL.

I'm okay that the PCE/Root interface is outside RPL, and even that it's
non-standard.   Some roots could include the PCE internally, I think.

    > "
    > With this specification, an abstract routing function called a Path
    > Computation Element [PCE] (e.g., located in an central controller or
    > collocated with the Root) interacts with the RPL Root to compute Peer
    > to Peer (P2P) paths within a pre-existing RPL Main DODAG. "

    >> The document says, "Root or an associated PCE " a few times, so maybe
    >> we could just call it the "P-DAO engine" or something like that.

    > I like using the standard term if that's abstract enough

Works for me.

    >> Maybe, instead of trying to make a definition list for this section,
    >> make subsections, because I think that each term here actually requi=
res
    >> more than a sentence.
    >>
    >> _subTrack_ or sub-track?
    >> 1) Not fond of camelcase in specifications.

    > This is common with the RAW architecture. I can uplift both but it's
    > work to do and undo, so I'd like to see a consensus.
    > Maybe make it an item to resolve for the WGLC?

okay.

    > "
    > 2.4.4.  Routing Stretch:

    > RPL is anisotropic, meaning that it is directional, or more exactly
    > polar.  RPL does not behave the same way "down" with multicast DIO

[wearing my dad-is-teenager-chemistry-tutor hat now wants to know if routing
can be both covalent and polar... ]

    > The term Routing Stretch denotes the length of a path, as compared
    > with a shortest path, which can be a abstract concepts in RPL when
    > the metrics are statistical and dynamic, and the concept of short
    > varies with the Objective Function.

Thanks

    >>
    >> section 3.4:
    >> "so-called Track Legs" ... I think the terminology says they are cal=
led
    >> Track Legs, so I think "so-called" is unneeded text.
    >> (ps: so now I have ZZtop in my head:
    >> https://www.youtube.com/watch?v=3DeUDcTLaWJuo )

    > Excellent! Done. The text can be a bit more explicit, more in the ful=
l excerpt below;

But, can we make ZZtop the theme song for this document?   :-)
     "RPL has Legs... and PCE knows how to use them!"

    >> "stitching" point... needs a definition, I think.

    > "
    > 2.4.9.  Stitching:

    > This specification using the term stitching to indicate that a track
    > is piped to another one, meaning that traffic out of the first is
    > injected in the other.
    > "
    > Works?

Good.

    >> I suggest section 4 identify when it Updates, whether it is Amending,

    > Argll you're killing me :) I still do not understand what "updates" m=
eans and now we amend?

There is a document trying to detail this, I'm just suggesting we get ahead
of that.

    > We do not break anything in existence if that is the question.

Amends doesn't mean break... it means that there is new work.

    > Following your line of thought I should make that a different section,
    > but it seems to me with this is really too picky.

if you can imagine a project manager assigning the work to two different
people, then a new section would help. "Bob, implement 4.5.6.9. Sian,
implement 4.5.6.8"

    > I already created many sections in the definition ad in section 3. Th=
is
    > will be the draft of one sentence per section.

That's okay with me, if they need to be easily referenced.
As, it, "Hey other implementer, you didn't do 4.5.6.7 correctly!"

    >> Last paragraph of 4.1.1 is about TIO/RIO, and deserves it's own Amen=
ds
    >> section.

    > I do not see why that is an amendment? The TIO/RIO discussion is toda=
y's RPL as is.

okay.

    >> I think that the 3-way-ness of this should be in the intro.

    > Let's take that as a potential addition to be discussed on the ML, too
    > big for me to yes/no just here

okay.

    >> section 6.4:
    >> The SRH-6LoRH with the Via Addresses in the NSM-VIO are not needed
    >> and MUST be omitted.
    ->
    >> The SRH-6LoRH with the Via Addresses in the NSM-VIO are not needed
    >> and MUST
    >> be ignored by the receiver.
    >>
    >> (I always prefer to tell the receiver what to discard, rather than t=
ell
    >> the sender what to omit)

    > OK still sending it wastes energy and may cause a packet loss. What a=
bout

Of course, it's stupid to send stuff that is not necessary.
Until... it becomes necessary, so knowing how the receiver will respond is
the important detail.

    >> 6.5.2:
    >> "It makes sense to add a new Leg before removing one that is
    >> misbehaving, and switch to the new Leg before removing the old.
    >> "
    >>
    >> does it? if the old one is misbehaving, wouldn't removing it send
    >> traffic up to the root (according to non-optimized flow), allowing
    >> traffic to flow rather than get dropped?  yes, there are some cases
    >> where this doesn't work.

    > "
    > It makes sense to
    > add a new Leg before removing one that is becoming excessively lossy,
    > and switch to the new Leg before removing the old.  Dropping a Track
    > before the new one is installed would reroute the traffic via the
    > root; this may augment the latency beyond acceptable thresholds, and
    > load the network near the root.  This may also cause loops in the
    > case of stitched Tracks; the packets that cannot be injected in the
    > second Track may be routed back at reinjected at the Ingress of the
    > first."

Works for me.

    >> section 8: i like these profiles.  We do need diagrams.
    >> (again, SVG and goat may be very nice to use) Do the profiles
    >> need to be announced in some place in the protocol?

    > Argl, I do not see that. Hopefully not?

okay.

    >>
    >> section 9: I don't think that the new risk for forged P-DAOs is
    >> adequately
    >> explained.   Can we at least authenticate P-DAO messages
    >> because they
    >> come from the Root? Sometimes the Root IP address is the same
    >> as the DODAGID.
    >> (but not always? I forget)

    > For P-DAO it is, yes. But we do not secure messages from the root. Th=
at
    > would be nice. How can we do that?

I'm okay if we say that only the root (identified by IP address) can send t=
hem.

    >> RFC9008 probably has
    >> provided all the primitives.  (I hope!) But, I'd like to see a state
    >> machine of sorts that relates the P-DAO, DAO-ACK and PDR/PDR-ACK
    >> messages.

    > Again, I'd like to see this agreed by the WG. Would that be normative?

Probably.

    >> I fear that the SHOULD/MUSTs/new-ICMPs messages are too spread over =
the
    >> document.

    > The previous review caused some restructuring. The more we do that the
    > more we spread. What do we prefer, stricture vs. MUSt concentration?

Well, if we had the 6LR changes with state machine, then all the MUSTs would
migrate to that section.


=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide





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>
>
>     > I opened a separate thread for this. What is hypothys.is ?
>
> A group commenting system that Rahul and I happen to both use.
> (Who remembers Netscape Group Annotations?... )
>

A quick fix: It is https://hypothes.is/
It has been super useful for me for the past several years. I found someone
highlighting the need for use of it in IETF in one of the lightning talk
(ref draft:
https://datatracker.ietf.org/doc/html/draft-sheffer-ietf-rfc-annotations-00)
..
It was a pleasant surprise to find Michael reply to one of the comments
there!

--000000000000cf4ea805d177aeec
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex"><br>
=C2=A0 =C2=A0 &gt; I opened a separate thread for this. What is <a href=3D"=
http://hypothys.is" rel=3D"noreferrer" target=3D"_blank">hypothys.is</a> ?<=
br>
<br>
A group commenting system that Rahul and I happen to both use.<br>
(Who remembers Netscape Group Annotations?... )<br><span class=3D"gmail_def=
ault" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)"></span><=
/blockquote><div><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:verdana,sans-serif;color:rgb(32,18,77)">A quick fix: It is <a href=3D"htt=
ps://hypothes.is/" target=3D"_blank">https://hypothes.is/</a></div><div cla=
ss=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:rgb(32,1=
8,77)">It has been super useful for me for the past several years. I found =
someone highlighting the need for use of it in IETF in one of the lightning=
 talk (ref draft:=C2=A0<a href=3D"https://datatracker.ietf.org/doc/html/dra=
ft-sheffer-ietf-rfc-annotations-00" target=3D"_blank">https://datatracker.i=
etf.org/doc/html/draft-sheffer-ietf-rfc-annotations-00</a>) ..=C2=A0<br></d=
iv><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;col=
or:rgb(32,18,77)">It was a pleasant surprise to find Michael reply to one o=
f the comments there!</div><div class=3D"gmail_default" style=3D"font-famil=
y:verdana,sans-serif;color:rgb(32,18,77)"><br></div><div class=3D"gmail_def=
ault" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)">=C2=A0</=
div></div></div>

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] dao-projection review
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Konrad Iwanicki <iwanicki@mimuw.edu.pl>, "Routing Over Low power and Lossy networks" <roll@ietf.org>, Michael Richardson <mcr+ietf@sandelman.ca>
Thread-Topic: [Roll] enrollment priority
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From: Rahul Jadhav <rahul.ietf@gmail.com>
Date: Wed, 24 Nov 2021 18:01:50 +0530
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Many Thanks Pascal

Please find my comments inline.

Regards,
Rahul

On Tue, 23 Nov 2021 at 23:34, Pascal Thubert (pthubert) <pthubert=3D
40cisco.com@dmarc.ietf.org> wrote:

>
>
>
>    1. In all the subsections of 3.5.1 ... there is a statement that "From
>    Neighbor Cache Entry: C delivers the packet to F.". I believe it shoul=
d be
>    "E delivers the packet to F". This stmt is in subsection 3.5.1.1/2/3
>
>
>
> PT > True, fixed both
>

[RJ] Thanks. Subsection 3.5.1.3 has the same statement and could use this
fix as well. In all, there were three subsections with the same statement.


>
>
> 2. Apart from Path, Track, subTrack, Segment, there are few other terms
> used ... "Legs" used in Section 3.6 (also elsewhere) and "Section" used i=
n
> Section 6.5.
>
> In section 3.6, the term Legs seems to be indicating the same as Path,
> i.e., multiple paths/legs can be combined to form a Track. In some other
> places (section 4.1.2), the usage of leg is more closer to Track then pat=
hs.
>
> In section 6.5 there is a statement, "This is ensured by installing the
> new section from its last node..." .. Is the section the same as the
> segment here?
>
>
>
> PT> let me define =E2=80=98section=E2=80=99 in terminology
>
> =E2=80=9C
>
> 2.4.13.  Section of a Segment
>
>
>
>    A continuous subset of a segment that may be replaced while the
>
>    segment remains. for instance, in segment A=3D>B=3D>C=3D>D=3D>E=3D>F, =
say that
>
>    the link C to D might be misbehaving.  The section B=3D>C=3D>D=3D>E in=
 the
>
>    segment may be replaced by B=3D>C'=3D>D'=3D>E to route around the prob=
lem.
>
>    The segment becomes A=3D>B=3D>C'=3D>D'=3D>E=3D>F.
>
> =E2=80=9C
>

[RJ] This is clear to me now.


>
>
>    1. The term "namespace" is used multiple times in the document. I
>    believe it relates to the scope of the TrackID .. It would be better t=
o
>    define it explicitly. RPL does not use that term.
>
> PT> true. What about
>
> =E2=80=9C
>
>
>
>
>
> 2.4.1.  namespace
>
>
>
>    The term namespace is used to refer to the scope of the TrackID.  The
>
>    TrackID is locally significant within its namespace.  The namespace
>
>    is identified by an IPv6 Global Unicast Address (GUA) that is used as
>
>    DODAGID for the Track.  The tuple (DODAGID, TrackID) is globally
>
>    unique.
>
> =E2=80=9C
>

[RJ] Much clearer. However, is it necessary to say "GUA" for DODAGID? Can't
the DODAGID be a ULA (Unique Local Address, fc00::/64) wherein the PCE,
Root and all the 6LRs are part of the same ULA network prefix? Does the
DODAGID have to be "globally routable"?



>
>
> 4. Section 4.1.1 specifies, "This specification generalizes the case of a
> parent that can be used to reach a child with that of a whole Track throu=
gh
> which children and siblings of the Track Egress are reachable."
>
> I am not sure if I follow this.
>
>
>
> PT> reworded the section. I hope it=E2=80=99s more palatable now:
>
> =E2=80=9C
>
>    In RPL Non-Storing Mode, the TIO and RTO are combined in a DAO message
> to
>
>    inform the DODAG Root of all the edges in the DODAG, which are formed
> by the
>
>    directed parent-child relationships. The DAO message signals to the Ro=
ot
>
>    that a given parent can be used to reach a given child. The P-DAO
> message
>
>    generalizes the DAO to signal to the Track Ingress that a Track for
> which it
>
>    is Root can be used to reach children and siblings of the Track Egress=
.
>
>    In both cases, options may be factorized and multiple RTOs may be
> present to
>
>    signal a collection of children that can be reached through the parent
> or
>
>    the Track, respectively.
>
> =E2=80=9C
>
>
>
[RJ] Now I get it. Thanks

>
>
>
>
> 5. In general the document does not seem to be considering backward
> compatibility with respect to new changes in RPI P flag, new messages add=
ed
> etc. Or am I wrong? Is section 8 "Profiles" supposed to take care of
> compatibility?
>
>
>
> PT> True. I asked in my reply to Michael=E2=80=99s review whether we shou=
ld be
> using the last free but in the RPL dodag config option to signal that thi=
s
> spec is being used globally, and both anycast and multicast can be
> injected. What do you think?
>

[RJ] I would rather have it explicitly specified as "Backward Compatibility
Considerations" section, since I am sure we will get this comment during
next higher-level reviews.

>
>
> 6. In Section 5.4: What exactly is the Step of Rank? Is it:
>
>    1. Difference between the rank of this node and the sibling?
>       2. DAGRank() as computed in Section 3.5.1 in RFC 6550? This needs
>       to be explained with an example.
>
> If Rank is a cost then that would be the cost for the hop to the sibling.
> What about:
>
> =E2=80=9C
>
>    Step in Rank:  16-bit unsigned integer.  This is the Step in Rank
>
>       [RPL] as computed by the Objective Function between this node and
>
>       the sibling, that reflects the abstract Rank increment that would
>
>       be computed by the OF if the sibling was the preferred parent.
>
>
>
> =E2=80=9C
>

[RJ] "... computed by the OF if the sibling was the preferred parent."
clarifies things for me.

--000000000000705add05d1880b0c
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<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:verdana,sans-serif;color:#20124d">Many Thanks Pascal=C2=A0</div><d=
iv class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#2=
0124d"><br></div><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif;color:#20124d">Please find my comments inline.</div><div class=
=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d"><=
br></div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-ser=
if;color:#20124d">Regards,</div><div class=3D"gmail_default" style=3D"font-=
family:verdana,sans-serif;color:#20124d">Rahul</div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, 23 Nov 2021 at =
23:34, Pascal Thubert (pthubert) &lt;pthubert=3D<a href=3D"mailto:40cisco.c=
om@dmarc.ietf.org">40cisco.com@dmarc.ietf.org</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_1626691091432053152WordSection1">
<p class=3D"MsoNormal"><br></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><span style=3D"color:rgb(32,18,77);font-family:Verda=
na,sans-serif;font-size:11pt">=C2=A0</span><br></p></div></div><div>
<div>
<ol style=3D"margin-top:0cm" start=3D"1" type=3D"1">
<li class=3D"gmail-m_1626691091432053152MsoListParagraph" style=3D"color:rg=
b(32,18,77);margin-left:0cm">
<font size=3D"2" color=3D"#20124d" face=3D"Verdana"><span style=3D"font-siz=
e:11pt;font-family:Verdana,sans-serif">In all the subsections of 3.5.1 ... =
there is a statement that &quot;From Neighbor Cache Entry: C delivers the p=
acket to F.&quot;. I believe it should be=C2=A0 &quot;E
 delivers the packet to F&quot;. This stmt is in subsection <a href=3D"http=
://3.5.1.1/2/3" target=3D"_blank">
3.5.1.1/2/3</a><u></u><u></u></span></font></li></ol>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span style=3D"fon=
t-size:11pt;font-family:Verdana,sans-serif"><u></u>=C2=A0<u></u></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">PT &gt; True, fixed both</span></font></p></div></div></div></=
div></div></blockquote><div><br></div><div><div class=3D"gmail_default" sty=
le=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)">[RJ] Thanks. Subs=
ection 3.5.1.3 has the same statement and could use this fix as well. In al=
l, there were three subsections with the same statement.</div></div><div>=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"=
EN-US" style=3D"overflow-wrap: break-word;"><div class=3D"gmail-m_162669109=
1432053152WordSection1"><div style=3D"border-top:none;border-right:none;bor=
der-bottom:none;border-left:1.5pt solid blue;padding:0cm 0cm 0cm 4pt"><div>=
<div><p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11pt"><u></u><u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:rgb(32,18,77);font-family:Verda=
na,sans-serif;font-size:11pt">2. Apart from Path, Track, subTrack, Segment,=
 there are few other terms used ... &quot;Legs&quot; used in Section 3.6 (a=
lso
 elsewhere) and &quot;Section&quot; used in Section 6.5.</span><br></p></di=
v>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)">In section 3.6, the term Legs seems to be indicating the same as Pat=
h, i.e., multiple paths/legs can be combined
 to form a Track. In some other places (section 4.1.2), the usage of leg is=
 more closer to Track then paths.<u></u><u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)">In section 6.5 there is a statement, &quot;</span></font><font color=
=3D"#222222" face=3D"Arial"><span style=3D"font-family:Arial,sans-serif;col=
or:rgb(34,34,34)">This
 is ensured by installing the new=C2=A0section from its last node...&quot; =
.. Is the section the same as the segment here?</span></font><font color=3D=
"#20124d" face=3D"Arial"><span style=3D"font-family:Arial,sans-serif;color:=
rgb(32,18,77)"><u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt"><u></u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">PT&gt; let me define =E2=80=98section=E2=80=99 in terminology<=
u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=E2=80=9C<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">2.4.13.=C2=A0 Section of a Segment<u=
></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u></span></font></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 A continuous subset of =
a segment that may be replaced while the<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 segment remains. for in=
stance, in segment A=3D&gt;B=3D&gt;C=3D&gt;D=3D&gt;E=3D&gt;F, say that<u></=
u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 the link C to D might b=
e misbehaving.=C2=A0 The section B=3D&gt;C=3D&gt;D=3D&gt;E in the<u></u><u>=
</u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 segment may be replaced=
 by B=3D&gt;C&#39;=3D&gt;D&#39;=3D&gt;E to route around the problem.<u></u>=
<u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=C2=A0=C2=A0 The segment becomes A=3D&gt;B=3D&gt;C&#39;=3D&gt;=
D&#39;=3D&gt;E=3D&gt;F.<u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=E2=80=9C</span></font></p></div></div></div></div></div></blo=
ckquote><div><br></div><div><div class=3D"gmail_default" style=3D"font-fami=
ly:verdana,sans-serif;color:rgb(32,18,77)">[RJ] This is clear to me now.</d=
iv></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
><div lang=3D"EN-US" style=3D"overflow-wrap: break-word;"><div class=3D"gma=
il-m_1626691091432053152WordSection1"><div style=3D"border-top:none;border-=
right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0cm 0cm =
0cm 4pt"><div><div><p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"=
><span style=3D"font-size:11pt"><u></u><u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<ol style=3D"margin-top:0cm" start=3D"2" type=3D"1">
<li class=3D"gmail-m_1626691091432053152MsoListParagraph" style=3D"color:rg=
b(32,18,77);margin-left:0cm">
<font size=3D"2" color=3D"#20124d" face=3D"Verdana"><span style=3D"font-siz=
e:11pt;font-family:Verdana,sans-serif">The term &quot;namespace&quot; is=C2=
=A0used multiple times in the document. I believe=C2=A0it relates to the sc=
ope=C2=A0of the TrackID .. It would be better to define it explicitly.
 RPL does not use that term.<u></u><u></u></span></font></li></ol>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span style=3D"fon=
t-size:11pt;font-family:Verdana,sans-serif">PT&gt; true. What about</span><=
/font><u></u><u></u></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span style=3D"fon=
t-size:11pt;font-family:Verdana,sans-serif">=E2=80=9C<u></u><u></u></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif"><u></=
u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif"><u></=
u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif">2.4.1=
.=C2=A0 namespace<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif"><u></=
u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif">=C2=
=A0=C2=A0 The term namespace is used to refer to the scope of the TrackID.=
=C2=A0 The<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif">=C2=
=A0=C2=A0 TrackID is locally significant within its namespace.=C2=A0 The na=
mespace<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif">=C2=
=A0=C2=A0 is identified by an IPv6 <span class=3D"gmail_default" style=3D"f=
ont-family:verdana,sans-serif;color:rgb(32,18,77)"></span>Global Unicast Ad=
dress (GUA) that is used as<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"V=
erdana"><span style=3D"font-size:11pt;font-family:Verdana,sans-serif">=C2=
=A0=C2=A0 DODAGID for the Track.=C2=A0 The tuple (DODAGID, TrackID) is glob=
ally<u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span style=3D"fon=
t-size:11pt;font-family:Verdana,sans-serif">=C2=A0=C2=A0 unique.<u></u><u><=
/u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span style=3D"fon=
t-size:11pt;font-family:Verdana,sans-serif">=E2=80=9C</span></font></p></di=
v></div></div></div></div></blockquote><div><br></div><div><div class=3D"gm=
ail_default" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)">[=
RJ] Much clearer. However, is it necessary to say &quot;GUA&quot; for DODAG=
ID? Can&#39;t the DODAGID be a ULA (Unique Local Address, fc00::/64) wherei=
n the PCE, Root and all the 6LRs are part of the same ULA network prefix? D=
oes the DODAGID have to be &quot;globally routable&quot;?</div><br></div><d=
iv>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=
=3D"EN-US" style=3D"overflow-wrap: break-word;"><div class=3D"gmail-m_16266=
91091432053152WordSection1"><div style=3D"border-top:none;border-right:none=
;border-bottom:none;border-left:1.5pt solid blue;padding:0cm 0cm 0cm 4pt"><=
div><div><p class=3D"MsoNormal"><font size=3D"2" face=3D"Verdana"><span sty=
le=3D"font-size:11pt;font-family:Verdana,sans-serif"><u></u><u></u></span><=
/font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)">4. Section 4.1.1 specifies, &quot;</span></font><font color=3D"#2222=
22" face=3D"Arial"><span style=3D"font-family:Arial,sans-serif;color:rgb(34=
,34,34)">This
 specification generalizes the=C2=A0case of a parent that can be used to re=
ach a child with that of a=C2=A0whole Track through which children and sibl=
ings of the Track Egress=C2=A0are reachable.&quot;</span></font><font color=
=3D"#20124d" face=3D"Verdana"><span style=3D"font-family:Verdana,sans-serif=
;color:rgb(32,18,77)"><u></u><u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#222222" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(34,34,34=
)">I am not sure if I follow this.=C2=A0</span></font><font color=3D"#20124=
d" face=3D"Arial"><span style=3D"font-family:Arial,sans-serif;color:rgb(32,=
18,77)"><u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt"><u></u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">PT&gt; reworded the section. I hope it=E2=80=99s more palatabl=
e now:<u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=E2=80=9C<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 In RPL Non-Storing Mode=
, the TIO and RTO are combined in a DAO message to<u></u><u></u></span></fo=
nt></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 inform the DODAG Root o=
f all the edges in the DODAG, which are formed by the<u></u><u></u></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 directed parent-child r=
elationships. The DAO message signals to the Root<u></u><u></u></span></fon=
t></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 that a given parent can=
 be used to reach a given child. The P-DAO message<u></u><u></u></span></fo=
nt></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 generalizes the DAO to =
signal to the Track Ingress that a Track for which it<u></u><u></u></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 is Root can be used to =
reach children and siblings of the Track Egress.<u></u><u></u></span></font=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 In both cases, options =
may be factorized and multiple RTOs may be present to<u></u><u></u></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"margin-left:5pt"><font size=3D"2" face=3D"C=
alibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0 signal a collection of =
children that can be reached through the parent or<u></u><u></u></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=C2=A0=C2=A0 the Track, respectively.<u></u><u></u></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=E2=80=9C<u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt"><u></u>=C2=A0</span></font></p></div></div></div></div></div><=
/blockquote><div><span class=3D"gmail_default" style=3D"font-family:verdana=
,sans-serif;color:rgb(32,18,77)">[RJ] Now I get it. Thanks</span>=C2=A0</di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US" sty=
le=3D"overflow-wrap: break-word;"><div class=3D"gmail-m_1626691091432053152=
WordSection1"><div style=3D"border-top:none;border-right:none;border-bottom=
:none;border-left:1.5pt solid blue;padding:0cm 0cm 0cm 4pt"><div><div><p cl=
ass=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"font-siz=
e:11pt"><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#222222" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(34,34,34=
)">5. In general the document does not seem to be considering backward comp=
atibility with respect to new changes in RPI
 P flag,=C2=A0new messages added etc. Or am I wrong? Is section 8 &quot;Pro=
files&quot; supposed to take care of compatibility?</span></font><font colo=
r=3D"#20124d" face=3D"Arial"><span style=3D"font-family:Arial,sans-serif;co=
lor:rgb(32,18,77)"><u></u><u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt"><u></u>=C2=A0<u></u></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">PT&gt; True. I asked in my reply to Michael=E2=80=99s review w=
hether we should be using the last free but in the RPL dodag config option =
to signal that this spec is being used globally,
 and both anycast and multicast can be injected. What do you think?</span><=
/font></p></div></div></div></div></div></blockquote><div><br></div><div cl=
ass=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:rgb(32,=
18,77)">[RJ] I would rather have it explicitly specified as &quot;Backward =
Compatibility Considerations&quot; section, since I am sure we will get thi=
s comment during next higher-level reviews.</div><div class=3D"gmail_defaul=
t" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)"></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US" style=3D"o=
verflow-wrap: break-word;"><div class=3D"gmail-m_1626691091432053152WordSec=
tion1"><div style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1.5pt solid blue;padding:0cm 0cm 0cm 4pt"><div><div><p class=3D"=
MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"font-size:11pt"=
><u></u><u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#20124d" face=3D"Verdana">=
<span style=3D"font-size:11pt;font-family:Verdana,sans-serif;color:rgb(32,1=
8,77)"><u></u>=C2=A0<u></u></span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#222222" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(34,34,34=
)">6. In Section 5.4:=C2=A0</span></font><font size=3D"2" color=3D"#202020"=
 face=3D"Helvetica"><span style=3D"font-size:10pt;font-family:Helvetica,san=
s-serif;color:rgb(32,32,32)">What
 exactly is the Step of Rank? Is it:</span></font><font color=3D"#20124d" f=
ace=3D"Verdana"><span style=3D"font-family:Verdana,sans-serif;color:rgb(32,=
18,77)"><u></u><u></u></span></font></p>
</div>
<ol style=3D"margin-top:0cm;box-sizing:border-box;list-style-position:insid=
e" start=3D"1" type=3D"1">
<ol style=3D"margin-top:0cm;box-sizing:border-box" start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:rgb(32,32,32);margin-bottom:3.5pt;bo=
x-sizing:border-box">
<font size=3D"2" color=3D"#202020" face=3D"Helvetica"><span style=3D"font-s=
ize:10pt;font-family:Helvetica,sans-serif">Difference between the rank of t=
his node and the sibling?<u></u><u></u></span></font></li><li class=3D"MsoN=
ormal" style=3D"color:rgb(32,32,32);margin-bottom:3.5pt;box-sizing:border-b=
ox">
<font size=3D"2" color=3D"#202020" face=3D"Helvetica"><span style=3D"font-s=
ize:10pt;font-family:Helvetica,sans-serif">DAGRank() as computed in Section=
 3.5.1 in RFC 6550? This needs to be explained with an example.<u></u><u></=
u></span></font></li></ol>
</ol>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.5pt"><font size=3D"2" face=
=3D"Calibri"><span style=3D"font-size:11pt">If Rank is a cost then that wou=
ld be the cost for the hop to the sibling. What about:<u></u><u></u></span>=
</font></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.5pt"><font size=3D"2" face=
=3D"Calibri"><span style=3D"font-size:11pt">=E2=80=9C<u></u><u></u></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:3.5pt;margin=
-left:5pt">
<font size=3D"2" face=3D"Calibri"><span style=3D"font-size:11pt">=C2=A0=C2=
=A0 Step in Rank:=C2=A0 16-bit unsigned integer.=C2=A0 This is the Step in =
Rank<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:3.5pt;margin=
-left:5pt">
<font size=3D"2" face=3D"Calibri"><span style=3D"font-size:11pt">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 [RPL] as computed by the Objective Function between t=
his node and<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:3.5pt;margin=
-left:5pt">
<font size=3D"2" face=3D"Calibri"><span style=3D"font-size:11pt">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 the sibling, that reflects the abstract Rank incremen=
t that would<u></u><u></u></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.5pt"><font size=3D"2" face=
=3D"Calibri"><span style=3D"font-size:11pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
be computed by the OF if the sibling was the preferred parent.<u></u><u></u=
></span></font></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.5pt"><font size=3D"2" face=
=3D"Calibri"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u></span></fo=
nt></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.5pt"><font size=3D"2" face=
=3D"Calibri"><span style=3D"font-size:11pt">=E2=80=9C</span></font></p></di=
v></div></div></div></blockquote><div><br></div><div><div class=3D"gmail_de=
fault" style=3D"font-family:verdana,sans-serif;color:rgb(32,18,77)">[RJ] &q=
uot;... computed by the OF if the sibling was the preferred parent.&quot; c=
larifies things for me.</div></div></div></div>

--000000000000705add05d1880b0c--


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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, Routing Over Low power and Lossy networks <roll@ietf.org>, Michael Richardson <mcr+ietf@sandelman.ca>
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From: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/RRYgH36iBRQDPs-WZV2h084diy0>
Subject: Re: [Roll] enrollment priority
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Hi Pascal,

On 24/11/2021 08:22, Pascal Thubert (pthubert) wrote:
> I think we're in sync, Konrad.
> 
> 1) For the trickle question, Rahul also mentioned it in his review:
> 
> I believe that there's the normal run time where the value changes in acceptable ranges, and there's emergency condition like a Root reaching saturation. Or maybe some coordination between DODAGs that triggers a min value in each DODAG, and we want that value to spread out fast.
> 
> Those latter cases cannot wait hours for the DIO to trickle out. I believe it should be up to the root to decide. So there should be a signal like a bit that says whether or not to reset Trickle.
> 
> The "OSN" should be independent of that. It should be incremented (and wrapping) with the new advertisements. Things are easier when each field has a clear function, side effects can be clever but are complex to manage.

OK. This seems reasonable. I would thus recommend that the draft contain 
explicit rules REQUIRING the bit to be set when min priority changes from:
- anything else to max (denoting saturation)
- max to anything else
as these changes would normally by the ones that should be propagated fast.

> 2) The min priority value used is the one associated with the most recent "OSN" seen, and that's not limited to preferred parent. That's one of the arguments to keep it intact as propagated.
> 
> A node that does not have a feasible parent should poison or detach. It does not make sense for a detached node to take visitors. So probably it should beacon a join priority of 0x7F.
> 
> Either way, its OSN in DIOs will not be incremented and a node that sees a a fresher OSN one will use that one and continue beacon a proper value.
> 
> Does all this make sense?

Yes. This is precisely what I meant. In case, a node does not have a 
preferred parent it should advertise a join priority of 0x7F (i.e., the 
priority in beacons not in DIOs because the ones in DIOs are fixed by 
the root as we agreed). What I wanted to suggest is adding this 
requirement/recommendation to the draft, so that it is clear that 
having/not having a preferred parent also affects the join priority in 
beacons (EBs).

Best,
-- 
- Konrad Iwanicki.

>> -----Original Message-----
>> From: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
>> Sent: mardi 23 novembre 2021 10:00
>> To: Routing Over Low power and Lossy networks <roll@ietf.org>; Pascal
>> Thubert (pthubert) <pthubert@cisco.com>; Michael Richardson
>> <mcr+ietf@sandelman.ca>
>> Subject: Re: [Roll] enrollment priority
>>
>> Hi all,
>>
>> On 23/11/2021 06:49, Pascal Thubert (pthubert) wrote:
>>> Hello Michael
>>>
>>> Please see
>>> https://datatracker.ietf.org/doc/minutes-interim-2021-roll-02-20210831
>>> 1800/
>>>
>>> We agreed that:
>>> - as Konrad says again here we need a new lollipop counter
>>> - as Rahul points out in his review the min priority is propagated
>>> unchanged in DIOs, what I understand Konrad calls GLOBAL
>>> - as Huimin said on Aug 19th we must define the behavior of the node,
>> which logic to use to increment the minimum priority from the DIO to place
>> in the beacon.
>>>
>>> GLOBAL vs FLEXIBLE was discussed, and I answered Konrad about the
>>> FLEXIBLE on Aug. 12th
>>> (https://mailarchive.ietf.org/arch/msg/roll/2MaZ4wXLVzJbmLC-LO6c--DsbW
>>> Q/) I do not see a use case for it, so it looks like overdesign but
>>> I'm open to be convinced otherwise
>>
>> Precisely, we agreed on what I call GLOBAL. In addition, from the
>> discussion in my e-mail, there are two additional issues outstanding (one
>> was mentioned by Michael). I believe we did not come to a conclusion
>> regarding them:
>>
>> - How do changes to min priority (and OSN) affect DIO Trickle timers?
>> [OSN == the lollipop sequence counter]
>>
>> - How does a (temporal) lack of a preferred parent affect the proxy
>> priority of the node in EBs (and in general, the node's behavior)?
>>
>> Best,
>> --
>> - Konrad Iwanicki.
>>
>>>> -----Original Message-----
>>>> From: Roll <roll-bounces@ietf.org> On Behalf Of Konrad Iwanicki
>>>> Sent: lundi 22 novembre 2021 15:55
>>>> To: Routing Over Low power and Lossy networks <roll@ietf.org>;
>>>> Michael Richardson <mcr+ietf@sandelman.ca>
>>>> Subject: Re: [Roll] enrollment priority
>>>>
>>>> Hi Michael,
>>>>
>>>> As we discussed throughout the mailing list, we also need a sequence
>>>> number so that correct values of DODAG_Size and min_priority are
>>>> adopted. This in turn requires putting more information in the draft
>>>> on the rules of adopting the values. They are explicitly formulated
>>>> in my earlier e-mail about GLOBAL vs FLEXIBLE.
>>>>
>>>> Take care,
>>>> --
>>>> - Konrad Iwanicki.
>>>>
>>>> On 22/11/2021 15:15, Michael Richardson wrote:
>>>>>
>>>>> I'm trying to edit draft-ietf-roll-enrollment-priority to reflect
>>>>> the WG consensus.
>>>>>
>>>>> I think that we agreed that the nodes within the DODAG should not
>>>>> change their enrollment priority.  It can be set by the root in it's
>>>>> DIO, and it will propogate through the DODAG according to the normal
>>>> trickle settings.
>>>>> Changes to the priority will *not*(?!) reset the trickle timer.
>>>>>
>>>>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/
>>>>> 9 is the pull request I just made, which may be easier to see the
>>>>> changes.
>>>>>
>>>>> specifically, I've deleted this line:
>>>>>
>>>>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/
>>>>> 9/
>>>>> files#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dc
>>>>> a4
>>>>> 061faL169
>>>>>
>>>>>       The nodes then adjust this base value based upon their observed
>>>>>       congestion, emitting their adjusted DIO value to their children.
>>>>>
>>>>> I actually find that there isn't a lot else to delete.
>>>>>
>>>>> I am concerned that I did not understand the WG consensus correctly,
>>>>> so I am have not yet published this version.
>>>>>
>>>>> Do we want to retain the ability for the root to send a value 0-0x7f
>>>>> into the DODAG, or was it only 0 and 1 that were useful?
>>>>>
>>>>> --
>>>>> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT
>> consulting
>>>> )
>>>>>               Sandelman Software Works Inc, Ottawa and Worldwide
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Roll mailing list
>>>>> Roll@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/roll
>>>>>
>>>>
>>>> _______________________________________________
>>>> Roll mailing list
>>>> Roll@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/roll
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>>
> 


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
CC: Routing Over Low power and Lossy networks <roll@ietf.org>, "Michael Richardson" <mcr+ietf@sandelman.ca>
Thread-Topic: [Roll] enrollment priority
Thread-Index: AQHX36t8x4bV91kMzkGBqe1OgwBQyawPoogAgAD1rBCAADmQgIABalRAgABldoCAAApfFw==
Date: Wed, 24 Nov 2021 13:17:30 +0000
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] dao-projection review
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Date: Wed, 24 Nov 2021 17:18:16 +0000
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let me collect replies into a single response.
I've also opened issues in github.

Konrad Iwanicki <iwanicki@mimuw.edu.pl> wrote:
    > As we discussed throughout the mailing list, we also need a sequence
    > number so that correct values of DODAG_Size and min_priority are
    > adopted. This in turn requires putting more information in the draft =
on
    > the rules of adopting the values. They are explicitly formulated in my
    > earlier e-mail about GLOBAL vs FLEXIBLE.

I thought that we needed a lollipop counter only if the values were going to
be different in different places in the DODAG.

Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    > Please see
    > https://datatracker.ietf.org/doc/minutes-interim-2021-roll-02-2021083=
11800/

I see that I agreed we need another lollipop counter, and I'll add that to
the document.  Is there text is another non-RFC6550 that I should use as
best-of-breed to explain the counter?

    > (https://mailarchive.ietf.org/arch/msg/roll/2MaZ4wXLVzJbmLC-LO6c--Dsb=
WQ/)
    > I do not see a use case for it, so it looks like overdesign but I'm
    > open to be convinced otherwise

okay.

Konrad Iwanicki <iwanicki@mimuw.edu.pl> wrote:
    > - How do changes to min priority (and OSN) affect DIO Trickle timers?
    > [OSN =3D=3D the lollipop sequence counter]

I think that if we have the counter, that increments the OSN reset the tric=
kle
timer, but Pascal suggests an additional bit to reset the trickle?
Maybe I'm lost here.
https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/13


Konrad> OK. This seems reasonable. I would thus recommend that the draft
Konrad> contain explicit rules REQUIRING the bit to be set when min priority
Konrad> changes from:=20
Konrad>   - anything else to max (denoting saturation)=20
Konrat>   - max to anything else as these changes would normally by the ones
Konrat>   that should be propagated fast.

We can certainly build these rules into enrollment priority option.
But, I wonder if resetting trickle has general application, and should actu=
ally be
signaled by inclusion of a new DIO option.  That removes the above implicit
logic from the nodes and moves it to the root.
(And invokes the adage about "naming and cache invalidation" being the hard=
 problems)
https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/12

    > - How does a (temporal) lack of a preferred parent affect the proxy
    > priority of the node in EBs (and in general, the node's behavior)?

If the node can't send traffic up to the root, then I think that it should
turn off EBs until it can.
In a 6tisch situation, it is likely that the lack of a preferred parent is
probably due to falling out of the schedule.

Pascal> A node that does not have a feasible parent should poison or
Pascal> detach. It does not make sense for a detached node to take
Pascal> visitors. So probably it should beacon a join priority of 0x7F.

Does detach mean to send a DIO with infinite rank?
I'm undecided if it should send a beacon at all.
https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/11


Rahul> The Root should have the ability to send any value into the DODAG. If
Rahul> Root is limited to value 0/1 and if it is not possible for any 6LRs =
to
Rahul> update the value then we might as well restrict the parameter size to
Rahul> 1 bit! Am I missing anything here?

A goal here is to allow a device which is re-attaching to be able to judge
between several equivalent DODAGs which might be on different PANIDs, with
different capacities.   0/1 might not be enough here, and I'd prefer to err
on the side of creating a slider which we never use in the end.

https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/10

=2D-=20
]               Never tell me the odds!                 | ipv6 mesh network=
s [=20
]   Michael Richardson, Sandelman Software Works        | network architect=
  [=20
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails  =
  [=20
=09


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Instead of fixing enrollment priority, could we make the two values that
the root wants to announce: dodag size, min.priority as a capability?

I see this as pushing capabilities out the door sooner, and maybe eliminating
a document in the IESG queue.

We have so far in the document on specified the routing resource capability
as a Capability Set *Response*, a reply from the node to the root.
We haven't specified a way to announce a value from the root to the nodes.

In the document we say that capability TLVs can be carried in DIO/DAO, but
also in other messages.  I don't think we defined any.

I'm not strongly attached to this idea, but thought of it while eating lunch.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] enrollment priority
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From nobody Wed Nov 24 12:48:27 2021
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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, Routing Over Low power and Lossy networks <roll@ietf.org>
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From: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/H9B3FHkLI7dtp1EXI6P05tBhVRY>
Subject: Re: [Roll] enrollment priority
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Hello Pascal and Michael,

My replies are inline.

On 24/11/2021 21:21, Pascal Thubert (pthubert) wrote:
>> Le 24 nov. 2021 à 18:26, Michael Richardson <mcr+ietf@sandelman.ca> a 
>> écrit :
>> let me collect replies into a single response.
>> I've also opened issues in github.
>>
>> Konrad Iwanicki <iwanicki@mimuw.edu.pl> wrote:
>>> As we discussed throughout the mailing list, we also need a sequence
>>> number so that correct values of DODAG_Size and min_priority are
>>> adopted. This in turn requires putting more information in the draft on
>>> the rules of adopting the values. They are explicitly formulated in my
>>> earlier e-mail about GLOBAL vs FLEXIBLE.
>>
>> I thought that we needed a lollipop counter only if the values were 
>> going to
>> be different in different places in the DODAG.
>>
> 
> It’s mostly to figure which is the most recent when several parents are 
> not at the same level.

Yes. This was the motivation.

>> Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
>>> Please see
>>> https://datatracker.ietf.org/doc/minutes-interim-2021-roll-02-202108311800/
>>
>> I see that I agreed we need another lollipop counter, and I'll add that to
>> the document.  Is there text is another non-RFC6550 that I should use as
>> best-of-breed to explain the counter?
> 
> Actually every text I’m aware of point to section 7 of rfc 6550.

Me too.

>>> (https://mailarchive.ietf.org/arch/msg/roll/2MaZ4wXLVzJbmLC-LO6c--DsbWQ/)
>>> I do not see a use case for it, so it looks like overdesign but I'm
>>> open to be convinced otherwise
>>
>> okay.
>>
>> Konrad Iwanicki <iwanicki@mimuw.edu.pl> wrote:
>>> - How do changes to min priority (and OSN) affect DIO Trickle timers?
>>> [OSN == the lollipop sequence counter]
>>
>> I think that if we have the counter, that increments the OSN reset the 
>> trickle
>> timer, but Pascal suggests an additional bit to reset the trickle?
>> Maybe I'm lost here.
>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/13
>>
> 
> Some casual updates do not deserve to be flooded faster than normal 
> stable DIO. But emergency and network control ones should. So we need a 
> trigger to say that this DIO message should reset trickle. May that bit 
> should not be in that option. It could be more generically used in DIOs.
> 
> 
>>
>> Konrad> OK. This seems reasonable. I would thus recommend that the draft
>> Konrad> contain explicit rules REQUIRING the bit to be set when min 
>> priority
>> Konrad> changes from:
>> Konrad>   - anything else to max (denoting saturation)
>> Konrat>   - max to anything else as these changes would normally by 
>> the ones
>> Konrat>   that should be propagated fast.
>>
>> We can certainly build these rules into enrollment priority option.
>> But, I wonder if resetting trickle has general application, and should 
>> actually be
>> signaled by inclusion of a new DIO option.
> 
> Oups i read this after thinking the same. I agree.

Now, I have second thoughts about the option (and the bit). Initially, I 
thought that having a new option is nice but now I do not see 
immediately what its semantics would be. In particular, how would a node 
know whether it has already reset its Trickle counter in response to the 
option or whether it should do this just now? The same goes for the bit.

I can imagine that the option could contain another lollipop counter but 
wonder whether it is a way to go?

>>  That removes the above implicit
>> logic from the nodes and moves it to the root.
>> (And invokes the adage about "naming and cache invalidation" being the 
>> hard problems)
>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/12
>>
> 
> Yes

See above.

>>> - How does a (temporal) lack of a preferred parent affect the proxy
>>> priority of the node in EBs (and in general, the node's behavior)?
>>
>> If the node can't send traffic up to the root, then I think that it should
>> turn off EBs until it can.
> 
> Yes; at least advertise 7F for the priority if it needs to beacon for 
> other reasons

I would vote for advertising 7f because at least this will update nodes 
that might have cached locally the node's old join priority and that 
attempt to use it as a proxy despite its lack of the preferred parent.

>> In a 6tisch situation, it is likely that the lack of a preferred parent is
>> probably due to falling out of the schedule.
>>
> 
> Yes

Yes, but this is just one of the reasons.

>> Pascal> A node that does not have a feasible parent should poison or
>> Pascal> detach. It does not make sense for a detached node to take
>> Pascal> visitors. So probably it should beacon a join priority of 0x7F.
>>
>> Does detach mean to send a DIO with infinite rank?
> 
> Poison means that. Detaching means forming its own dodag with the G bit 
> not set (not grounded)
> 
>> I'm undecided if it should send a beacon at all.
>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/11
>>
> 
> No se

I would do poisoning in this case. See above concerning the 7f value.

>> Rahul> The Root should have the ability to send any value into the 
>> DODAG. If
>> Rahul> Root is limited to value 0/1 and if it is not possible for any 
>> 6LRs to
>> Rahul> update the value then we might as well restrict the parameter 
>> size to
>> Rahul> 1 bit! Am I missing anything here?
>>
>> A goal here is to allow a device which is re-attaching to be able to judge
>> between several equivalent DODAGs which might be on different PANIDs, with
>> different capacities.   0/1 might not be enough here, and I'd prefer 
>> to err
>> on the side of creating a slider which we never use in the end.
>>
>> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/issues/10

I have no strong opinion on any of the solutions. Having more than 1 bit 
seems more generic. Whether those bits will be used in a different 
manner than "binary" is probably deployment specific.

Take care,
-- 
- Konrad Iwanicki.


From nobody Thu Nov 25 06:11:32 2021
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, "Routing Over Low power and Lossy networks" <roll@ietf.org>
Thread-Topic: [Roll] review of dao-projection -21
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From nobody Thu Nov 25 06:27:25 2021
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Subject: [Roll] I-D Action: draft-ietf-roll-dao-projection-22.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks WG of the IETF.

        Title           : Root initiated routing state in RPL
        Authors         : Pascal Thubert
                          Rahul Arvind Jadhav
                          Matthew Gillmore
	Filename        : draft-ietf-roll-dao-projection-22.txt
	Pages           : 80
	Date            : 2021-11-25

Abstract:
   This document extends RFC 6550, RFC 6553, and RFC 8138 to enable a
   RPL Root to install and maintain Projected Routes within its DODAG,
   along a selected set of nodes that may or may not include self, for a
   chosen duration.  This potentially enables routes that are more
   optimized or resilient than those obtained with the classical
   distributed operation of RPL, either in terms of the size of a
   Routing Header or in terms of path length, which impacts both the
   latency and the packet delivery ratio.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-roll-dao-projection/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-roll-dao-projection-22.html

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-roll-dao-projection-22


Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/0Lbqz1RQnj9SvqF5lFGQ36fmV6M>
Subject: Re: [Roll] I-D Action: draft-ietf-roll-dao-projection-22.txt
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Dear all:

This addresses the pre WGLC review by coauthors.=20
Remous Aris will produce another and then I guess we'll be ready for WGLC.

 Please note:
- Michael raised a number of issues that we need to progress on as a group
- Ines indicated that some tickets might be left open - I could not spot th=
em but we'll look at that offline.

Keep safe!

Pascal

> -----Original Message-----
> From: Roll <roll-bounces@ietf.org> On Behalf Of internet-drafts@ietf.org
> Sent: jeudi 25 novembre 2021 15:27
> To: i-d-announce@ietf.org
> Cc: roll@ietf.org
> Subject: [Roll] I-D Action: draft-ietf-roll-dao-projection-22.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Routing Over Low power and Lossy network=
s
> WG of the IETF.
>=20
>         Title           : Root initiated routing state in RPL
>         Authors         : Pascal Thubert
>                           Rahul Arvind Jadhav
>                           Matthew Gillmore
> 	Filename        : draft-ietf-roll-dao-projection-22.txt
> 	Pages           : 80
> 	Date            : 2021-11-25
>=20
> Abstract:
>    This document extends RFC 6550, RFC 6553, and RFC 8138 to enable a
>    RPL Root to install and maintain Projected Routes within its DODAG,
>    along a selected set of nodes that may or may not include self, for a
>    chosen duration.  This potentially enables routes that are more
>    optimized or resilient than those obtained with the classical
>    distributed operation of RPL, either in terms of the size of a
>    Routing Header or in terms of path length, which impacts both the
>    latency and the packet delivery ratio.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-roll-dao-projection/
>=20
> There is also an HTML version available at:
> https://www.ietf.org/archive/id/draft-ietf-roll-dao-projection-22.html
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-roll-dao-projection-22
>=20
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
>=20
> _______________________________________________
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Subject: Re: [Roll] enrollment priority
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Content-Type: text/plain; charset=utf-8
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Pascal Thubert \(pthubert\) <pthubert=3D40cisco.com@dmarc.ietf.org> wrote:
    > (https://mailarchive.ietf.org/arch/msg/roll/2MaZ4wXLVzJbmLC-LO6c--Dsb=
WQ/)
    > Konrad Iwanicki <iwanicki@mimuw.edu.pl> wrote:
    konrad> - How do changes to min priority (and OSN) affect DIO Trickle t=
imers?
    konrad> [OSN =3D=3D the lollipop sequence counter]

    konrad> I think that if we have the counter, that increments the OSN re=
set the trickle
    konrad> timer, but Pascal suggests an additional bit to reset the
    konrad> trickle?

    pt> Some casual updates do not deserve to be flooded faster than normal
    pt> stable DIO. But emergency and network control ones should. So we ne=
ed a
    pt> trigger to say that this DIO message should reset trickle. May that=
 bit
    pt> should not be in that option. It could be more generically used in
    pt> DIOs.

    mcr> We can certainly build these rules into enrollment priority option.
    mcr> But, I wonder if resetting trickle has general application, and sh=
ould actually be
    mcr> signaled by inclusion of a new DIO option.

    pt> Oups i read this after thinking the same. I agree.

okay, I'll include this.

    konrad> - How does a (temporal) lack of a preferred parent affect the p=
roxy
    konrad> priority of the node in EBs (and in general, the node's behavio=
r)?

    mcr> If the node can't send traffic up to the root, then I think that i=
t should
    mcr> turn off EBs until it can.

    pt> Yes; at least advertise 7F for the priority if it needs to beacon f=
or other reasons

I agree, 7F (infinite) if it needs to beacon.
Should it even beacon if it has no feasible parents?

    mcr> In a 6tisch situation, it is likely that the lack of a preferred p=
arent is
    mcr> probably due to falling out of the schedule.

    pt> Yes

    Pascal> A node that does not have a feasible parent should poison or
    Pascal> detach. It does not make sense for a detached node to take
    Pascal> visitors. So probably it should beacon a join priority of 0x7F.

    mcr> Does detach mean to send a DIO with infinite rank?

    pt> Poison means that. Detaching means forming its own dodag with the G
    pt> bit not set (not grounded)

    mcr> I'm undecided if it should send a beacon at all.
    mcr> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/iss=
ues/11

There seem to be a number of parts to a decision tree here.

I will start more threads.

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks WG of the IETF.

        Title           : RPL Observations
        Authors         : Rahul Arvind Jadhav
                          Rabi Narayan Sahoo
                          Yuefeng Wu
	Filename        : draft-ietf-roll-rpl-observations-07.txt
	Pages           : 21
	Date            : 2021-11-29

Abstract:
   This document describes RPL protocol design issues, various
   observations and possible consequences of the design and
   implementation choices.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-roll-rpl-observations/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-roll-rpl-observations-07

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-roll-rpl-observations-07


Internet-Drafts are also available by anonymous FTP at:
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--000000000000d7718805d1f9c96c
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Folks,

The RPL observations draft contains observations captured over the years by
the working group about the problem statements, general observations with
respect to RPL operations, behaviour.

Problem statements include:
1. Problems associated with storing MOP
     a. incrementing DTSN in sub-dodag.. If a 6LR switches path, should it
increment DTSN to inform child nodes to update their path? observations,
possible issues in the context.
     b. how to handle DAO retransmissions in storing MOP?
     c. ensuring bi-directional path establishment in storing MOP?
2. implementation notes related to trickle timer
3. Handling of Path Control Bits (ever heard of it!) in RPL.
4. Adjacencies probing with RPL
5. lollipop counters and its dep on persistent storage ... implications if
you set the lollipop counters parameters unwisely
6. Handling upgrades/extns to RPL
... lots of other interesting stuff ...

We just posted a -07 version with no changes to keep it alive since some of
the current drafts refer to these problem statements...

Any feedback is welcome, very much appreciated.

Thanks,
Rahul





---------- Forwarded message ---------

A new version of I-D, draft-ietf-roll-rpl-observations-07.txt
has been successfully submitted by Rahul Arvind Jadhav and posted to the
IETF repository.

Name:           draft-ietf-roll-rpl-observations
Revision:       07
Title:          RPL Observations
Document date:  2021-11-29
Group:          roll
Pages:          21
URL:
https://www.ietf.org/archive/id/draft-ietf-roll-rpl-observations-07.txt
Status:
https://datatracker.ietf.org/doc/draft-ietf-roll-rpl-observations/
Htmlized:
https://datatracker.ietf.org/doc/html/draft-ietf-roll-rpl-observations
Diff:
https://www.ietf.org/rfcdiff?url2=draft-ietf-roll-rpl-observations-07

Abstract:
   This document describes RPL protocol design issues, various
   observations and possible consequences of the design and
   implementation choices.

--000000000000d7718805d1f9c96c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif;color:#20124d">Folks,</div><div class=3D"gmail_default" style=3D=
"font-family:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmai=
l_default" style=3D"font-family:verdana,sans-serif;color:#20124d">The RPL o=
bservations draft contains observations captured over the years by the work=
ing group about the problem statements, general observations with respect t=
o RPL operations, behaviour.</div><div class=3D"gmail_default" style=3D"fon=
t-family:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:verdana,sans-serif;color:#20124d">Problem state=
ments include:</div><div class=3D"gmail_default" style=3D"font-family:verda=
na,sans-serif;color:#20124d">1. Problems associated with storing MOP</div><=
div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#=
20124d">=C2=A0 =C2=A0 =C2=A0a. incrementing DTSN in sub-dodag.. If a 6LR sw=
itches path, should=C2=A0it increment DTSN to inform child nodes to update =
their path? observations, possible issues in the=C2=A0context.</div><div cl=
ass=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d=
">=C2=A0 =C2=A0 =C2=A0b. how to handle DAO retransmissions in storing MOP?<=
/div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;c=
olor:#20124d">=C2=A0 =C2=A0 =C2=A0c. ensuring bi-directional path establish=
ment in storing MOP?</div><div class=3D"gmail_default" style=3D"font-family=
:verdana,sans-serif;color:#20124d">2. implementation notes related to trick=
le timer</div><div class=3D"gmail_default" style=3D"font-family:verdana,san=
s-serif;color:#20124d">3. Handling of Path Control Bits (ever heard of it!)=
 in RPL.</div><div class=3D"gmail_default" style=3D"font-family:verdana,san=
s-serif;color:#20124d">4. Adjacencies probing with RPL</div><div class=3D"g=
mail_default" style=3D"font-family:verdana,sans-serif;color:#20124d">5. lol=
lipop counters and its dep on persistent storage ... implications if you se=
t the lollipop counters parameters unwisely</div><div class=3D"gmail_defaul=
t" style=3D"font-family:verdana,sans-serif;color:#20124d">6. Handling upgra=
des/extns to RPL</div><div class=3D"gmail_default" style=3D"font-family:ver=
dana,sans-serif;color:#20124d">... lots of other interesting stuff ...</div=
><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color=
:#20124d"><br></div><div class=3D"gmail_default" style=3D"font-family:verda=
na,sans-serif;color:#20124d">We just posted a -07 version with no changes t=
o keep it alive since some of the current drafts refer to these problem sta=
tements...</div><div class=3D"gmail_default" style=3D"font-family:verdana,s=
ans-serif;color:#20124d"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:verdana,sans-serif;color:#20124d">Any feedback is welcome, very m=
uch appreciated.</div><div class=3D"gmail_default" style=3D"font-family:ver=
dana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_default" style=
=3D"font-family:verdana,sans-serif;color:#20124d">Thanks,</div><div class=
=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d">R=
ahul</div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-se=
rif;color:#20124d"><br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:verdana,sans-serif;color:#20124d"><br></div><div class=3D"gmail_default=
" style=3D"font-family:verdana,sans-serif;color:#20124d"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:verdana,sans-serif;color:#20124d"=
><br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_a=
ttr">---------- Forwarded message ---------<br><br></div>
A new version of I-D, draft-ietf-roll-rpl-observations-07.txt<br>
has been successfully submitted by Rahul Arvind Jadhav and posted to the<br=
>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-roll-rpl-observati=
ons<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A007<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RPL Observations<br>
Document date:=C2=A0 2021-11-29<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 roll<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 21<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/archive/id/draft-ietf-roll-rpl-observations-07.txt" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/archive/id/draft-ietf-roll-rpl-observ=
ations-07.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-ietf-roll-rpl-observations/" rel=3D"noreferrer" target=3D"_=
blank">https://datatracker.ietf.org/doc/draft-ietf-roll-rpl-observations/</=
a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-ietf-roll-rpl-observations" rel=3D"noreferrer" target=3D"_b=
lank">https://datatracker.ietf.org/doc/html/draft-ietf-roll-rpl-observation=
s</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-ietf-roll-rpl-observations-07" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-roll-rpl-ob=
servations-07</a><br>
<br>
Abstract:<br>
=C2=A0 =C2=A0This document describes RPL protocol design issues, various<br=
>
=C2=A0 =C2=A0observations and possible consequences of the design and<br>
=C2=A0 =C2=A0implementation choices.<br><br>
</div></div>

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