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From: Konrad Iwanicki <iwanicki@mimuw.edu.pl>
To: Routing Over Low power and Lossy networks <roll@ietf.org>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
Reply-To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Date: Mon, 4 Oct 2021 23:02:29 +0200
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Subject: Re: [Roll] Border router failure detection
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Dear Pascal,

Regarding my talk at the last interim, could you please elaborate on 
your suggestions/comments regarding the RNFD draft, notably the one 
about routing through the DODAG root and the other about the parameters?

They seem relevant and I would like to address them in the GitHub repo 
version of the draft but, analyzing them again, I am not quite sure if I 
fully got them.

Thanks a lot in advance!

(And sorry for the delay but I was swamped with other tasks.)

Best,
-- 
- Konrad Iwanicki.


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "ROLL WG (roll@ietf.org)" <roll@ietf.org>
Thread-Topic: Which MOP for RPL AODV?
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Subject: [Roll] Which MOP for RPL AODV?
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Dear all,

RPL AODV is close to completion, congrats to the authors!
Now, there's the question of the MOP and 2 options, reuse the experimental =
one for P2P RPL, or take another.

Right now, the draft takes 5 and P2P has 4 (https://www.iana.org/assignment=
s/rpl/rpl.xhtml#mop)

My observation is that P2P is the experiment that leads to AODV, so AODV sh=
ould deprecate it.

I have not heard of real deployments, and if that happened, I do not expect=
 a mix of devices that would create confusion.
So would that be OK to assign MOP 4 to RPL AODV?

Note that we only have up to 6 to play with, and the multicast and anycast =
supports are already on the cooking table.

Keep safe,

Pascal


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pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Dear all,
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">RPL AODV is close to completion, congrats to the authors!<o:p></=
o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Now, there&#8217;s the question of the MOP and 2 options, reuse =
the experimental one for P2P RPL, or take another.<o:p></o:p></span></font>=
</p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Right now, the draft takes 5 and P2P has 4 (<a href=3D"https://w=
ww.iana.org/assignments/rpl/rpl.xhtml#mop">https://www.iana.org/assignments=
/rpl/rpl.xhtml#mop</a></span></font><font face=3D"Arial"><span style=3D"fon=
t-family:&quot;Arial&quot;,sans-serif">)<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></sp=
an></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">My observation is tha=
t P2P is the experiment that leads to AODV, so AODV should deprecate it.
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></sp=
an></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">I have not heard of r=
eal deployments, and if that happened, I do not expect a mix of devices tha=
t would create confusion.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">So would that be OK t=
o assign MOP 4 to RPL AODV?<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></sp=
an></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Note that we only hav=
e up to 6 to play with, and the multicast and anycast supports are already =
on the cooking table.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></sp=
an></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Keep safe,<o:p></o:p>=
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></sp=
an></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Pascal<font color=3D"=
#666666"><span style=3D"color:#666666"><o:p></o:p></span></font></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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[Added the draft name to the subject to benefit my filters. ;-) ]

Pascal:

Hi!

I asked the same question (about aodv-rpl replacing/obsoleting rfc6997)
when I did my review [1] =E2=80=94 more than two years ago!  But sadly rece=
ived no
real reply from the WG =E2=80=94 so we moved ahead with the document as it =
is now.
Peter brought the question back in his IoT DIT review [2] earlier this
year, but again no discussion from the WG.

It is clear to see that aodv-rpl uses some of the technology from rfc6997
and, as I understand it, a deployment would never include both.  The
question then is valid and I would love to see more interest this time
around.

Just FYI =E2=80=94 there would need to be some process behind a move to for=
mally
replace rfc6997 (beyond updating the draft).  We can deal with that if we
need to.

Thanks!

Alvaro.


[1] https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/
[2]
https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8=
930ZYI/


On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (
pthubert=3D40cisco.com@dmarc.ietf.org) wrote:

Dear all,



RPL AODV is close to completion, congrats to the authors!

Now, there=E2=80=99s the question of the MOP and 2 options, reuse the exper=
imental
one for P2P RPL, or take another.



Right now, the draft takes 5 and P2P has 4 (
https://www.iana.org/assignments/rpl/rpl.xhtml#mop)



My observation is that P2P is the experiment that leads to AODV, so AODV
should deprecate it.



I have not heard of real deployments, and if that happened, I do not expect
a mix of devices that would create confusion.

So would that be OK to assign MOP 4 to RPL AODV?



Note that we only have up to 6 to play with, and the multicast and anycast
supports are already on the cooking table.



Keep safe,



Pascal


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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body><div style=3D"font-family:Helvetica,Arial;font-size:13px">[Add=
ed the draft name to the subject to benefit my filters. ;-) ]</div><div sty=
le=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=3D"f=
ont-family:Helvetica,Arial;font-size:13px">Pascal:</div><div style=3D"font-=
family:Helvetica,Arial;font-size:13px"><br></div><div style=3D"font-family:=
Helvetica,Arial;font-size:13px">Hi!</div><div style=3D"font-family:Helvetic=
a,Arial;font-size:13px"><br></div><div style=3D"font-family:Helvetica,Arial=
;font-size:13px">I asked the same question (about aodv-rpl replacing/obsole=
ting rfc6997) when I did my review [1] =E2=80=94 more than two years ago!=
=C2=A0 But sadly received no real reply from the WG =E2=80=94 so we moved a=
head with the document as it is now.=C2=A0 Peter brought the question back =
in his IoT DIT review [2] earlier this year, but again no discussion from t=
he WG.</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br><=
/div><div style=3D"font-family:Helvetica,Arial;font-size:13px">It is clear =
to see that aodv-rpl uses some of the technology from rfc6997 and, as I und=
erstand it, a deployment would never include both.=C2=A0 The question then =
is valid and I would love to see more interest this time around.</div><div =
style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=
=3D"font-family:Helvetica,Arial;font-size:13px">Just FYI =E2=80=94 there wo=
uld need to be some process behind a move to formally replace rfc6997 (beyo=
nd updating the draft).=C2=A0 We can deal with that if we need to.</div><di=
v style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=
=3D"font-family:Helvetica,Arial;font-size:13px">Thanks!</div><div style=3D"=
font-family:Helvetica,Arial;font-size:13px"><br></div><div style=3D"font-fa=
mily:Helvetica,Arial;font-size:13px">Alvaro.</div> <div><br></div><div><br>=
</div>[1]=C2=A0<a href=3D"https://mailarchive.ietf.org/arch/msg/roll/XXaPFy=
hqiUS_bpYSJT45UaLyeec/">https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhq=
iUS_bpYSJT45UaLyeec/</a>=C2=A0<div>[2]=C2=A0<a href=3D"https://mailarchive.=
ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/">https://mai=
larchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/</a>=
=C2=A0<br><p class=3D"airmail_on">On October 6, 2021 at 2:29:30 AM, Pascal =
Thubert (pthubert) (<a href=3D"mailto:pthubert=3D40cisco.com@dmarc.ietf.org=
">pthubert=3D40cisco.com@dmarc.ietf.org</a>) wrote:</p> <blockquote type=3D=
"cite" class=3D"clean_bq"><span><div lang=3D"EN-US" link=3D"#0563C1" vlink=
=3D"#954F72" style=3D"word-wrap:break-word"><div></div><div>






<div class=3D"WordSection1">
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Dear all,
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">RPL AODV is close to completion, congrats to the authors!</span>=
</font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Now, there=E2=80=99s the question of the MOP and 2 options, reus=
e the experimental one for P2P RPL, or take another.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;colo=
r:#666666">Right now, the draft takes 5 and P2P has 4 (<a href=3D"https://w=
ww.iana.org/assignments/rpl/rpl.xhtml#mop">https://www.iana.org/assignments=
/rpl/rpl.xhtml#mop</a></span></font><font face=3D"Arial"><span style=3D"fon=
t-family:&quot;Arial&quot;,sans-serif">)</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><=
/p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">My observation is tha=
t P2P is the experiment that leads to AODV, so AODV should deprecate it.
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><=
/p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">I have not heard of r=
eal deployments, and if that happened, I do not expect a mix of devices tha=
t would create confusion.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">So would that be OK t=
o assign MOP 4 to RPL AODV?</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><=
/p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Note that we only hav=
e up to 6 to play with, and the multicast and anycast supports are already =
on the cooking table.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><=
/p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Keep safe,</span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><=
/p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Pascal<font color=3D"=
#666666"><span style=3D"color:#666666"></span></font></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">=C2=A0</span></font></p>
</div>


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<br></div></div></span></blockquote> <div class=3D"gmail_signature"></div><=
/div></body></html>

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Dario Tedeschi <dat@exegin.com>
CC: "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
Thread-Topic: [6lo] New Version Notification for draft-thubert-6lo-unicast-lookup-01.txt
Thread-Index: AQHXs6OuA8af2hR230igf2rTLId5qqu34F1AgAziKwCAABf0PIAAKGOAgACH6yA=
Date: Wed, 6 Oct 2021 13:00:28 +0000
Deferred-Delivery: Wed, 6 Oct 2021 12:59:43 +0000
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Subject: Re: [Roll] Which MOP for RPL AODV?
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Pascal Thubert \(pthubert\) <pthubert=3D40cisco.com@dmarc.ietf.org> wrote:
    > My observation is that P2P is the experiment that leads to AODV, so
    > AODV should deprecate it.

Agreed.

    > I have not heard of real deployments, and if that happened, I do not
    > expect a mix of devices that would create confusion.  So would that be
    > OK to assign MOP 4 to RPL AODV?

You've convinced me.

Alvaro Retana <aretana.ietf@gmail.com> wrote:
    > Just FYI =E2=80=94 there would need to be some process behind a move =
to
    > formally replace rfc6997 (beyond updating the draft).  We can deal wi=
th
    > that if we need to.

So, obsoletes RFC6997 then?

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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Subject: Re: [Roll] Which MOP for RPL AODV?
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On October 6, 2021 at 2:46:25 PM, Michael Richardson wrote:


Michael:

Hi!


...
> Alvaro Retana wrote:
> > Just FYI =E2=80=94 there would need to be some process behind a move to
> > formally replace rfc6997 (beyond updating the draft). We can deal with
> > that if we need to.
>
> So, obsoletes RFC6997 then?

If that's what the WG wants then yes.

rfc6997 is required by rfc7733 (Applicability Statement...Home
Automation and Building Control), so we would need to Update that.

Also, rfc6998 (Measurement of Routing Metrics in LLNs) depends on
rfc6997: "...the utility of this mechanism is dependent on the
existence of P2P-RPL [RFC6997]." =C2=A0We would need to see if rfc6998 also
works with aodv-rpl and Update or Obsolete.

None of this is a showstopper (from my point of view), but it does
require some work and most likely a new IETF LC (at least).


The alternative (just thinking out loud) would be to specify the use
of the same MOP along with some text explaining why it is not an issue
that the value is shared -- and what could happen if both device types
were mixed. =C2=A0This option should require less work/process because
we're not affecting other documents.


Alvaro.


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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
Cc: "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
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From: Dario Tedeschi <dat@exegin.com>
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Subject: Re: [Roll] [6lo] New Version Notification for draft-thubert-6lo-unicast-lookup-01.txt
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Hi Pascal,

I think the 2nd and 4th cases can be merged, by allowing a root node to 
automatically propagate the following multicast messages, using MPL:

  * All scope 3 (Realm-Local) multicast messages it either originates or
    receives on an MPL interface.
  * All Unicast-Prefix-based IPv6 Multicast Addresses (RFC 3306) higher
    than scope 3, where the network prefix (given in the mulitcast
    destination address), matches the prefix of the DODAG ID (the RPL
    network's subnet).

Automatic forwarding of the 2nd address type could be optional and 
administratively configured.

If nodes are interested in other multicasts higher than scope 3, they 
must explicitly inform the root by sending DAO messages with appropriate 
Target Options.

---------

The 3rd case, I think, needs its own mop code (i.e. "Non-storing mode 
with source-routed multicast").

For the 1st and 3rd cases, how do you envision multicasts propagating up 
the DODAG (towards the root)? Would a node simply L2 unicast to its 
preferred parent?

Regards
Dario


On 10/6/21 6:00 AM, Pascal Thubert (pthubert) wrote:
>
> OK Dario, so we’d have 4 optional combinations:
>
> unicast = mop 1 multicast = mop 3 (what the draft does today)
>
> unicast = mop 1 multicast = MPL (that I believe the draft allows today 
> but should clarify); in that mode, not message to the Root, the root 
> floods all multicast messages with the idea that there’s always a 
> listener somewhere
>
> unicast = mop 1 multicast = mop 1 (to be added) in that mode the 6LR 
> sends a DAO to the root for a multicast target, and the Root sends n 
> messages that are unicast source routed to the n 6LR that have 
> listeners, only the last address in the SRH is multicast
>
> unicast = mop 1 multicast = MPL (that I believe the draft allows today 
> but should clarify); in that mode, in that mode the 6LR sends a DAO to 
> the root for a multicast target, and the root uses MPL only when 
> there’s known listeners
>
> Do we describe them all? Should we consume RPL MOPs?
>
> I suggested that AODV RPL reuses MOP 4 to leave room…
>
> Pascal
>
> *From:* Dario Tedeschi <dat@exegin.com>
> *Sent:* mercredi 6 octobre 2021 0:05
> *To:* Pascal Thubert (pthubert) <pthubert@cisco.com>
> *Cc:* 6lo@ietf.org
> *Subject:* Re: [6lo] New Version Notification for 
> draft-thubert-6lo-unicast-lookup-01.txt
>
> Hi Pascal
>
> See my comment  below.
>
> On 10/5/21 12:40 PM, Pascal Thubert (pthubert) wrote:
>
>     Hello Dario
>
>     Please see below;
>
>
>
>         Le 5 oct. 2021 à 20:15, Dario Tedeschi <dat@exegin.com>
>         <mailto:dat@exegin.com>a écrit :
>
>         ﻿ Hi Pascal,
>
>         Thank you for new draft. However I do have some
>         comments/questions.
>
>         What benefit does the ‘M’ bit provide over simply detecting a
>         multicast address in the Target Address field?
>
>         The IPv6 multicast address type is clearly defined in RFC 4291
>         (section 2.4)
>         <https://datatracker.ietf.org/doc/html/rfc4291#section-2.4>,
>         and the detection of such an address is trivial. Most (if not
>         all) Stacks have a simple function/macro to do that job and
>         many existing protocols already use this mechanism to
>         distinguish between unicast and multicast addresses.  It seems
>         to me that a special bit to indicate multicast registration
>         would be redundant and require handling for 4 different cases,
>         2 of which would be errors:
>
>           * M = 1, Target = multicast addr
>           * M = 1, Target= unicast addr  — ERROR
>           * M = 0, Target = multicast addr — ERROR
>           * M = 0, Target= unicast addr
>
>     True enough. Dario.
>
>     I’ve been pondering that too. On the one hand it seems cleaner to
>     announce the service that the 6LN expects. Otoh as you point out
>     it can be inferred from the address.
>
>     Another way of seeing this is that the error cases that you
>     indicate can be detected if we have the bit otherwise they can’t.
>
> [DT] I take your point about detecting the errors, assuming an 
> implementation could do something useful with that knowledge, other 
> than just discarding the message.
>
>
>     Then there’s anycast which is missing from both RPL and ND , which
>     cannot be distinguished by the look of the address and thus
>     requires a bit.
>
> [DT] As for the anycast address, I suppose the question to ask is what 
> would a router do differently knowing such information? I suspect we 
> would have to define some new behavior along with the new bit.
>
>
>     Then there’s possibly the need of an IPv4 AF. All in all I tended
>     to favor having the bit but that’s really not a strong position,
>     happy to be convinced otherwise.
>
> [DT] I presume you are talking of "IPv4-Compatible" and "IPv4-Mapped" 
> IPv6 addresses. If my presumption is correct, aren't these still 
> easily identifiable through their unique prefixes (::/96 and 
> ::ffff/96, respectively)?
>
>
>     What do others think?
>
> [DT] I have no strong opinion. The M bit just seemed redundant.
>
>
>
>
>
>         I also wonder about the requirement for non-storing RPL
>         networks to propagate multicast membership up the DODAG. My
>         understanding is that non-storing networks typically use MPL
>         (RFC 7731) <https://www.rfc-editor.org/rfc/rfc7731.html> which
>         does not need multicast memberships to be propagated
>         throughout the DODAG. It uses a flooding mechanism to forward
>         multicast datagrams, and does not unicast at L2. Could the new
>         document accommodate non-storing networks using MPL?
>
>     Sure;
>
>     Bottom line here is that for MPL all the multicast packets of
>     interest for the LLN are flooded throughout so I suspect that
>     there is no need for the 6LR to signal to the root.
>
> [DT] Yes, that's my understanding as well.
>
>
>
>
>     If that’s the case then there’s nothing to standardize.  All I
>     need to clarify is that the RPL behavior in the spec is the one
>     expected in a RPL domain that supports mop 3 otherwise what is
>     done is out of scope for this doc.
>
>
>
>      Do you see it otherwise?
>
> [DT] I agree that only RPL mode 3 needs to be defined and other modes 
> are left out of scope.
>
>
>
>     I mean should the 6LR signal unicast to the root like for unicast
>     traffic when serving a RPL unaware leaf?
>
> [DT] That certainly could be an optimization for non-storing mode so 
> that a border-router might know what multicast groups to forward from 
> outside the network. Unfortunately though there is no MOP that is 
> "Non-storing with multicast", although one could argue semantics and 
> simply use MOP 1.
>
> [DT] If we were to opt for such behavior, 6LR nodes could simply add 
> RPL Target options to their DAO's, for the multicast groups they were 
> interested in (including those requested by leaf nodes).
>
>
>      If so wouldn’t it be expected that the Root makes n unicast to
>     all 6LRs that have listeners?
>
> [DT] I'm not sure that would make sense when MPL is being used, but it 
> makes for an interesting alternative to MPL.
>
>
>
>     Should we describe that mode as well?
>
> [DT] As an alternative to MPL? Sure.
>
>
>
>     Pascal
>
>         Regards
>
>         Dario
>
>
>
>             On Sep 27, 2021, at 6:32 AM, Pascal Thubert (pthubert)
>             <pthubert=40cisco.com@dmarc.ietf.org
>             <mailto:pthubert=40cisco.com@dmarc.ietf.org>> wrote:
>
>             Dear all:
>
>             This draft is a continuation of our work on RFC 8505,
>             8928, and 8929.
>
>             Comments welcome!
>
>             Pascal
>
>             -----Original Message-----
>             From: internet-drafts@ietf.org
>             <mailto:internet-drafts@ietf.org>
>             <internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>>
>             Sent: lundi 27 septembre 2021 15:29
>             To: Eric Levy- Abegnoli (elevyabe) <elevyabe@cisco.com
>             <mailto:elevyabe@cisco.com>>; Pascal Thubert (pthubert)
>             <pthubert@cisco.com <mailto:pthubert@cisco.com>>
>             Subject: New Version Notification for
>             draft-thubert-6lo-unicast-lookup-01.txt
>
>
>             A new version of I-D, draft-thubert-6lo-unicast-lookup-01.txt
>             has been successfully submitted by Pascal Thubert and
>             posted to the IETF repository.
>
>             Name:draft-thubert-6lo-unicast-lookup
>             Revision:01
>             Title:IPv6 Neighbor Discovery Unicast Lookup
>             Document date:2021-09-27
>             Group:Individual Submission
>             Pages:15
>             URL:
>             https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt
>             Status:
>             https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/
>             Html:
>             https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html
>             Htmlized:
>             https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup
>             Diff:
>             https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01
>
>             Abstract:
>               This document updates RFC 8505 in order to enable
>             unicast address
>               lookup from a 6LoWPAN Border Router acting as an Address
>             Registrar.
>
>
>
>
>             The IETF Secretariat
>
>
>             _______________________________________________
>             6lo mailing list
>             6lo@ietf.org <mailto:6lo@ietf.org>
>             https://www.ietf.org/mailman/listinfo/6lo
>


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    Hi Pascal,<br>
    <br>
    I think the 2nd and 4th cases can be merged, by allowing a root node
    to automatically propagate the following multicast messages, using
    MPL:<br>
    <ul>
      <li>All scope 3 (Realm-Local) multicast messages it either
        originates or receives on an MPL interface. <br>
      </li>
      <li>All Unicast-Prefix-based IPv6 Multicast Addresses (RFC 3306)
        higher than scope 3, where the network prefix (given in the
        mulitcast destination address), matches the prefix of the DODAG
        ID (the RPL network's subnet).</li>
    </ul>
    <p>Automatic forwarding of the 2nd address type could be optional
      and administratively configured.<br>
    </p>
    <p>If nodes are interested in other multicasts higher than scope 3,
      they must explicitly inform the root by sending DAO messages with
      appropriate Target Options. <br>
    </p>
    ---------<br>
    <br>
    The 3rd case, I think, needs its own mop code (i.e. "Non-storing
    mode with source-routed multicast"). <br>
    <br>
    For the 1st and 3rd cases, how do you envision multicasts
    propagating up the DODAG (towards the root)? Would a node simply L2
    unicast to its preferred parent?<br>
    <br>
    Regards<br>
    Dario<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 10/6/21 6:00 AM, Pascal Thubert
      (pthubert) wrote:<br>
    </div>
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      <div class="WordSection1">
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">OK Dario, so we’d have 4 optional
              combinations:<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">unicast = mop 1 multicast = mop 3
              (what the draft does today)<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">unicast = mop 1 multicast = MPL
              (that I believe the draft allows today but should
              clarify); in that mode, not message to the Root, the root
              floods all multicast messages with the idea that there’s
              always a listener somewhere<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">unicast = mop 1 multicast = mop 1
              (to be added) in that mode the 6LR sends a DAO to the root
              for a multicast target, and the Root sends n messages that
              are unicast source routed to the n 6LR that have
              listeners, only the last address in the SRH is multicast<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">unicast = mop 1 multicast = MPL
              (that I believe the draft allows today but should
              clarify); in that mode, in that mode the 6LR sends a DAO
              to the root for a multicast target, and the root uses MPL
              only when there’s known listeners<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">Do we describe them all? Should
              we consume RPL MOPs?<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">I suggested that AODV RPL reuses
              MOP 4 to leave room…<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt">Pascal<o:p></o:p></span></font></p>
        <p class="MsoNormal"><font size="2" face="Calibri"><span
              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0cm
          0cm 0cm 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0cm 0cm 0cm">
              <p class="MsoNormal"><b><font size="2" face="Calibri"><span
                      style="font-size:11.0pt;font-weight:bold">From:</span></font></b>
                Dario Tedeschi <a class="moz-txt-link-rfc2396E" href="mailto:dat@exegin.com">&lt;dat@exegin.com&gt;</a>
                <br>
                <b><span style="font-weight:bold">Sent:</span></b>
                mercredi 6 octobre 2021 0:05<br>
                <b><span style="font-weight:bold">To:</span></b> Pascal
                Thubert (pthubert) <a class="moz-txt-link-rfc2396E" href="mailto:pthubert@cisco.com">&lt;pthubert@cisco.com&gt;</a><br>
                <b><span style="font-weight:bold">Cc:</span></b>
                <a class="moz-txt-link-abbreviated" href="mailto:6lo@ietf.org">6lo@ietf.org</a><br>
                <b><span style="font-weight:bold">Subject:</span></b>
                Re: [6lo] New Version Notification for
                draft-thubert-6lo-unicast-lookup-01.txt<o:p></o:p></p>
            </div>
          </div>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt"><o:p> </o:p></span></font></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><font
              size="2" face="Calibri"><span style="font-size:11.0pt">Hi
                Pascal<br>
                <br>
                See my comment  below.<o:p></o:p></span></font></p>
          <div>
            <p class="MsoNormal"><font size="2" face="Calibri"><span
                  style="font-size:11.0pt">On 10/5/21 12:40 PM, Pascal
                  Thubert (pthubert) wrote:<o:p></o:p></span></font></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <p class="MsoNormal"><font size="2" face="Calibri"><span
                  style="font-size:11.0pt">Hello Dario
                  <o:p></o:p></span></font></p>
            <div>
              <p class="MsoNormal"><font size="2" face="Calibri"><span
                    style="font-size:11.0pt"><o:p> </o:p></span></font></p>
            </div>
            <div>
              <p class="MsoNormal" style="margin-bottom:12.0pt"><font
                  size="2" face="Calibri"><span style="font-size:11.0pt">Please
                    see below;<o:p></o:p></span></font></p>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><br>
                      <br>
                      <o:p></o:p></span></font></p>
                <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                  <p class="MsoNormal" style="margin-bottom:12.0pt"><font
                      size="2" face="Calibri"><span
                        style="font-size:11.0pt" lang="FR">Le 5 oct.
                        2021 à 20:15, Dario Tedeschi
                      </span><a href="mailto:dat@exegin.com"
                        moz-do-not-send="true"><span lang="FR">&lt;dat@exegin.com&gt;</span></a></font><span
                      lang="FR"> a écrit :<o:p></o:p></span></p>
                </blockquote>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">﻿ Hi Pascal,
                        <o:p></o:p></span></font></p>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">Thank you for new
                          draft. However I do have some
                          comments/questions.<o:p></o:p></span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">What benefit does the
                          ‘M’ bit provide over simply detecting a
                          multicast address in the Target Address field?<o:p></o:p></span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">The IPv6 multicast
                          address type is clearly defined in </span><a
                          href="https://datatracker.ietf.org/doc/html/rfc4291#section-2.4"
                          moz-do-not-send="true">RFC 4291 (section 2.4)</a></font>,
                      and the detection of such an address is trivial.
                      Most (if not all) Stacks have a simple
                      function/macro to do that job and many existing
                      protocols already use this mechanism to
                      distinguish between unicast and multicast
                      addresses.  It seems to me that a special bit to
                      indicate multicast registration would be redundant
                      and require handling for 4 different cases, 2 of
                      which would be errors:<o:p></o:p></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                  <div>
                    <ul type="disc">
                      <li class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                        level1 lfo3">
                        <font size="2" face="Calibri"><span
                            style="font-size:11.0pt">M = 1, Target =
                            multicast addr<o:p></o:p></span></font></li>
                      <li class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                        level1 lfo3">
                        <font size="2" face="Calibri"><span
                            style="font-size:11.0pt">M = 1, Target=
                            unicast addr  — ERROR<o:p></o:p></span></font></li>
                      <li class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                        level1 lfo3">
                        <font size="2" face="Calibri"><span
                            style="font-size:11.0pt">M = 0, Target =
                            multicast addr — ERROR<o:p></o:p></span></font></li>
                      <li class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                        level1 lfo3">
                        <font size="2" face="Calibri"><span
                            style="font-size:11.0pt">M = 0, Target=
                            unicast addr<o:p></o:p></span></font></li>
                    </ul>
                    <div>
                      <p class="MsoNormal" style="margin-left:36.0pt"><font
                          size="2" face="Calibri"><span
                            style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                    </div>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">True enough. Dario.<o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">I’ve been pondering that
                      too. On the one hand it seems cleaner to announce
                      the service that the 6LN expects. Otoh as you
                      point out it can be inferred from the address.<o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Another way of seeing
                      this is that the error cases that you indicate can
                      be detected if we have the bit otherwise they
                      can’t.<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] I take your point about
                detecting the errors, assuming an implementation could
                do something useful with that knowledge, other than just
                discarding the message.<br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Then there’s anycast
                      which is missing from both RPL and ND , which
                      cannot be distinguished by the look of the address
                      and thus requires a bit.
                      <o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] As for the anycast
                address, I suppose the question to ask is what would a
                router do differently knowing such information? I
                suspect we would have to define some new behavior along
                with the new bit.<br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Then there’s possibly the
                      need of an IPv4 AF. All in all I tended to favor
                      having the bit but that’s really not a strong
                      position, happy to be convinced otherwise.<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] I presume you are talking
                of "IPv4-Compatible" and "IPv4-Mapped" IPv6 addresses.
                If my presumption is correct, aren't these still easily
                identifiable through their unique prefixes (::/96 and
                ::ffff/96, respectively)?<br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">What do others think?<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] I have no strong opinion.
                The M bit just seemed redundant.<br>
                <br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <p class="MsoNormal"><font size="2" face="Calibri"><span
                    style="font-size:11.0pt"><br>
                    <br>
                    <o:p></o:p></span></font></p>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">I also wonder about
                          the requirement for non-storing RPL networks
                          to propagate multicast membership up the
                          DODAG. My understanding is that non-storing
                          networks typically use </span><a
                          href="https://www.rfc-editor.org/rfc/rfc7731.html"
                          moz-do-not-send="true">MPL (RFC 7731)</a></font> 
                      which does not need multicast memberships to be
                      propagated throughout the DODAG. It uses a
                      flooding mechanism to forward multicast datagrams,
                      and does not unicast at L2. Could the new document
                      accommodate non-storing networks using MPL?<o:p></o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Sure; <o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Bottom line here is that
                      for MPL all the multicast packets of interest for
                      the LLN are flooded throughout so I suspect that
                      there is no need for the 6LR to signal to the
                      root.<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] Yes, that's my
                understanding as well.<br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><br>
                      <br>
                      <o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">If that’s the case then
                      there’s nothing to standardize.  All I need to
                      clarify is that the RPL behavior in the spec is
                      the one expected in a RPL domain that supports mop
                      3 otherwise what is done is out of scope for this
                      doc. <o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><br>
                      <br>
                      <o:p></o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"> Do you see it otherwise?
                      <o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] I agree that only RPL mode
                3 needs to be defined and other modes are left out of
                scope.<br>
                <br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">I mean should the 6LR
                      signal unicast to the root like for unicast
                      traffic when serving a RPL unaware leaf?<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] That certainly could be an
                optimization for non-storing mode so that a
                border-router might know what multicast groups to
                forward from outside the network. Unfortunately though
                there is no MOP that is "Non-storing with multicast",
                although one could argue semantics and simply use MOP 1.
                <br>
                <br>
                [DT] If we were to opt for such behavior, 6LR nodes
                could simply add RPL Target options to their DAO's, for
                the multicast groups they were interested in (including
                those requested by leaf nodes).<br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"> If so wouldn’t it be
                      expected that the Root makes n unicast to all 6LRs
                      that have listeners?<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] I'm not sure that would
                make sense when MPL is being used, but it makes for an
                interesting alternative to MPL.<br>
                <br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Should we describe that
                      mode as well?<o:p></o:p></span></font></p>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt">[DT] As an alternative to MPL?
                Sure.<br>
                <br>
                <br>
                <br>
                <o:p></o:p></span></font></p>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
              </div>
              <div>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Pascal <o:p></o:p></span></font></p>
              </div>
              <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
                <div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">   <o:p></o:p></span></font></p>
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt">Regards<o:p></o:p></span></font></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt">Dario<o:p></o:p></span></font></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt"><br>
                            <br>
                            <o:p></o:p></span></font></p>
                      <blockquote
                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                        <div>
                          <p class="MsoNormal"><font size="2"
                              face="Calibri"><span
                                style="font-size:11.0pt">On Sep 27,
                                2021, at 6:32 AM, Pascal Thubert
                                (pthubert) &lt;</span><a
                                href="mailto:pthubert=40cisco.com@dmarc.ietf.org"
                                moz-do-not-send="true">pthubert=40cisco.com@dmarc.ietf.org</a></font>&gt;
                            wrote:<o:p></o:p></p>
                        </div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                        <div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">Dear all:<br>
                                  <br>
                                  This draft is a continuation of our
                                  work on RFC 8505, 8928, and 8929.<br>
                                  <br>
                                  Comments welcome!<br>
                                  <br>
                                  Pascal<br>
                                  <br>
                                  -----Original Message-----<br>
                                  From: </span><a
                                  href="mailto:internet-drafts@ietf.org"
                                  moz-do-not-send="true">internet-drafts@ietf.org</a></font>
                              &lt;<a
                                href="mailto:internet-drafts@ietf.org"
                                moz-do-not-send="true">internet-drafts@ietf.org</a>&gt;
                              <br>
                              Sent: lundi 27 septembre 2021 15:29<br>
                              To: Eric Levy- Abegnoli (elevyabe) &lt;<a
                                href="mailto:elevyabe@cisco.com"
                                moz-do-not-send="true">elevyabe@cisco.com</a>&gt;;
                              Pascal Thubert (pthubert) &lt;<a
                                href="mailto:pthubert@cisco.com"
                                moz-do-not-send="true">pthubert@cisco.com</a>&gt;<br>
                              Subject: New Version Notification for
                              draft-thubert-6lo-unicast-lookup-01.txt<br>
                              <br>
                              <br>
                              A new version of I-D,
                              draft-thubert-6lo-unicast-lookup-01.txt<br>
                              has been successfully submitted by Pascal
                              Thubert and posted to the IETF repository.<br>
                              <br>
                              Name:<span class="apple-tab-span"> </span>draft-thubert-6lo-unicast-lookup<br>
                              Revision:<span class="apple-tab-span"> </span>01<br>
                              Title:<span class="apple-tab-span"> </span>IPv6
                              Neighbor Discovery Unicast Lookup<br>
                              Document date:<span class="apple-tab-span">
                              </span>2021-09-27<br>
                              Group:<span class="apple-tab-span"> </span>Individual
                              Submission<br>
                              Pages:<span class="apple-tab-span"> </span>15<br>
                              URL:            <a
href="https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt"
                                moz-do-not-send="true">https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt</a><br>
                              Status:         <a
href="https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/"
                                moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/</a><br>
                              Html:           <a
href="https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html"
                                moz-do-not-send="true">https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html</a><br>
                              Htmlized:       <a
href="https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup"
                                moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup</a><br>
                              Diff:           <a
href="https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01"
                                moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01</a><br>
                              <br>
                              Abstract:<br>
                                This document updates RFC 8505 in order
                              to enable unicast address<br>
                                lookup from a 6LoWPAN Border Router
                              acting as an Address Registrar.<br>
                              <br>
                              <br>
                              <br>
                              <br>
                              The IETF Secretariat<br>
                              <br>
                              <br>
_______________________________________________<br>
                              6lo mailing list<br>
                              <a href="mailto:6lo@ietf.org"
                                moz-do-not-send="true">6lo@ietf.org</a><br>
                              <a
                                href="https://www.ietf.org/mailman/listinfo/6lo"
                                moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/6lo</a><o:p></o:p></p>
                          </div>
                        </div>
                      </blockquote>
                    </div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  </div>
                </div>
              </blockquote>
            </div>
          </blockquote>
          <p class="MsoNormal"><font size="2" face="Calibri"><span
                style="font-size:11.0pt"><o:p> </o:p></span></font></p>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Dario Tedeschi <dat@exegin.com>
CC: "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
Thread-Topic: [6lo] New Version Notification for draft-thubert-6lo-unicast-lookup-01.txt
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Date: Wed, 6 Oct 2021 20:09:23 +0000
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Subject: Re: [Roll] [6lo] New Version Notification for draft-thubert-6lo-unicast-lookup-01.txt
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
CC: Michael Richardson <mcr+ietf@sandelman.ca>
Thread-Topic: [Roll] Which MOP for RPL AODV?
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Subject: Re: [Roll] Which MOP for RPL AODV?
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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
Cc: "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
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From: Dario Tedeschi <dat@exegin.com>
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Subject: Re: [Roll] [6lo] New Version Notification for draft-thubert-6lo-unicast-lookup-01.txt
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Comments in line below:

On 10/6/21 1:09 PM, Pascal Thubert (pthubert) wrote:
> Hello Dario
>
>
>
>
>
>> Le 6 oct. 2021 à 21:50, Dario Tedeschi <dat@exegin.com> a écrit :
>>
>> ﻿ Hi Pascal,
>>
>> I think the 2nd and 4th cases can be merged, by allowing a root node 
>> to automatically propagate the following multicast messages, using MPL:
>>
>>   * All scope 3 (Realm-Local) multicast messages it either originates
>>     or receives on an MPL interface.
>>   * All Unicast-Prefix-based IPv6 Multicast Addresses (RFC 3306)
>>     higher than scope 3, where the network prefix (given in the
>>     mulitcast destination address), matches the prefix of the DODAG
>>     ID (the RPL network's subnet).
>>
>
>
> WFM, conforms https://www.rfc-editor.org/rfc/rfc7346.html#section-5
>>
>> Automatic forwarding of the 2nd address type could be optional and 
>> administratively configured.
>>
>> If nodes are interested in other multicasts higher than scope 3, they 
>> must explicitly inform the root by sending DAO messages with 
>> appropriate Target Options.
>>
>> ---------
>>
>> The 3rd case, I think, needs its own mop code (i.e. "Non-storing mode 
>> with source-routed multicast").
>>
>
> Yes, but we have to look at backwards compatibility / brown field and 
> allow though not recommend to use mop 1; same issue as already 
> discussed with mop 3 in the dread
>
[DT]
OK I think I get it. So if mop is 1 and MPL is disabled or not present, 
your 3rd case description applies. Makes sense to me.

It should however be clearly described in the doc. Perhaps something 
like: "In the absence of MPL, multicast datagrams are unicast and 
source-routed".

>> For the 1st and 3rd cases, how do you envision multicasts propagating 
>> up the DODAG (towards the root)? Would a node simply L2 unicast to 
>> its preferred parent?
>>
>
> The 6 LN does. It know about RPL and registers the multicast address. 
> Upon. The first registration The 6LR sends a unicast DAO to the Root 
> as we do for RUL. This time though the address in the target is 
> multicast. The root makes a copy per 6LR that shows as transit and 
> sends along the unicast SR path to the 6 LR as it would for a RUL 
> unicast. Less efficient that mop 3 that builds a real multicast tree, 
> but backward compatible for for nodes on path…
>
> Works?

[DT]
Yes that seems fine, but I was actually more interested in multicast 
*datagrams* that originate from a 6LR node mid-way in the tree. How do 
such datagrams propagate up to the root?. I can see three possible methods:

 1. L2 unicast to the preferred parent at each hop
 2. Encapsulate the mcast datagram in a link-local unicast IPv6 header
    at each hop, where the outer destination is the the link-local
    address of the preferred parent.
 3. Encapsulate the mcast datagram in a route-able unicast IPv6 header,
    where the outer destination is a global address of the root node and
    then allow normal IPv6 unicast forwarding to occur at each hop.


Options 2 and 3 allow for the addition of the RPL HbH option, without 
mutating the original packet and are similar to what existing RPL 
forwarders already do.

Or is this already covered in some other RFC?


>
> Pascal
>
>
>
>> Regards
>> Dario
>>
>>
>> On 10/6/21 6:00 AM, Pascal Thubert (pthubert) wrote:
>>>
>>> OK Dario, so we’d have 4 optional combinations:
>>>
>>> unicast = mop 1 multicast = mop 3 (what the draft does today)
>>>
>>> unicast = mop 1 multicast = MPL (that I believe the draft allows 
>>> today but should clarify); in that mode, not message to the Root, 
>>> the root floods all multicast messages with the idea that there’s 
>>> always a listener somewhere
>>>
>>> unicast = mop 1 multicast = mop 1 (to be added) in that mode the 6LR 
>>> sends a DAO to the root for a multicast target, and the Root sends n 
>>> messages that are unicast source routed to the n 6LR that have 
>>> listeners, only the last address in the SRH is multicast
>>>
>>> unicast = mop 1 multicast = MPL (that I believe the draft allows 
>>> today but should clarify); in that mode, in that mode the 6LR sends 
>>> a DAO to the root for a multicast target, and the root uses MPL only 
>>> when there’s known listeners
>>>
>>> Do we describe them all? Should we consume RPL MOPs?
>>>
>>> I suggested that AODV RPL reuses MOP 4 to leave room…
>>>
>>> Pascal
>>>
>>> *From:* Dario Tedeschi <dat@exegin.com>
>>> *Sent:* mercredi 6 octobre 2021 0:05
>>> *To:* Pascal Thubert (pthubert) <pthubert@cisco.com>
>>> *Cc:* 6lo@ietf.org
>>> *Subject:* Re: [6lo] New Version Notification for 
>>> draft-thubert-6lo-unicast-lookup-01.txt
>>>
>>> Hi Pascal
>>>
>>> See my comment  below.
>>>
>>> On 10/5/21 12:40 PM, Pascal Thubert (pthubert) wrote:
>>>
>>>     Hello Dario
>>>
>>>     Please see below;
>>>
>>>
>>>
>>>         Le 5 oct. 2021 à 20:15, Dario Tedeschi <dat@exegin.com>
>>>         <mailto:dat@exegin.com>a écrit :
>>>
>>>         ﻿ Hi Pascal,
>>>
>>>         Thank you for new draft. However I do have some
>>>         comments/questions.
>>>
>>>         What benefit does the ‘M’ bit provide over simply detecting
>>>         a multicast address in the Target Address field?
>>>
>>>         The IPv6 multicast address type is clearly defined in RFC
>>>         4291 (section 2.4)
>>>         <https://datatracker.ietf.org/doc/html/rfc4291#section-2.4>,
>>>         and the detection of such an address is trivial. Most (if
>>>         not all) Stacks have a simple function/macro to do that job
>>>         and many existing protocols already use this mechanism to
>>>         distinguish between unicast and multicast addresses.  It
>>>         seems to me that a special bit to indicate multicast
>>>         registration would be redundant and require handling for 4
>>>         different cases, 2 of which would be errors:
>>>
>>>           * M = 1, Target = multicast addr
>>>           * M = 1, Target= unicast addr  — ERROR
>>>           * M = 0, Target = multicast addr — ERROR
>>>           * M = 0, Target= unicast addr
>>>
>>>     True enough. Dario.
>>>
>>>     I’ve been pondering that too. On the one hand it seems cleaner
>>>     to announce the service that the 6LN expects. Otoh as you point
>>>     out it can be inferred from the address.
>>>
>>>     Another way of seeing this is that the error cases that you
>>>     indicate can be detected if we have the bit otherwise they can’t.
>>>
>>> [DT] I take your point about detecting the errors, assuming an 
>>> implementation could do something useful with that knowledge, other 
>>> than just discarding the message.
>>>
>>>
>>>     Then there’s anycast which is missing from both RPL and ND ,
>>>     which cannot be distinguished by the look of the address and
>>>     thus requires a bit.
>>>
>>> [DT] As for the anycast address, I suppose the question to ask is 
>>> what would a router do differently knowing such information? I 
>>> suspect we would have to define some new behavior along with the new 
>>> bit.
>>>
>>>
>>>     Then there’s possibly the need of an IPv4 AF. All in all I
>>>     tended to favor having the bit but that’s really not a strong
>>>     position, happy to be convinced otherwise.
>>>
>>> [DT] I presume you are talking of "IPv4-Compatible" and 
>>> "IPv4-Mapped" IPv6 addresses. If my presumption is correct, aren't 
>>> these still easily identifiable through their unique prefixes (::/96 
>>> and ::ffff/96, respectively)?
>>>
>>>
>>>     What do others think?
>>>
>>> [DT] I have no strong opinion. The M bit just seemed redundant.
>>>
>>>
>>>
>>>
>>>
>>>         I also wonder about the requirement for non-storing RPL
>>>         networks to propagate multicast membership up the DODAG. My
>>>         understanding is that non-storing networks typically use MPL
>>>         (RFC 7731) <https://www.rfc-editor.org/rfc/rfc7731.html>
>>>         which does not need multicast memberships to be propagated
>>>         throughout the DODAG. It uses a flooding mechanism to
>>>         forward multicast datagrams, and does not unicast at L2.
>>>         Could the new document accommodate non-storing networks
>>>         using MPL?
>>>
>>>     Sure;
>>>
>>>     Bottom line here is that for MPL all the multicast packets of
>>>     interest for the LLN are flooded throughout so I suspect that
>>>     there is no need for the 6LR to signal to the root.
>>>
>>> [DT] Yes, that's my understanding as well.
>>>
>>>
>>>
>>>
>>>     If that’s the case then there’s nothing to standardize.  All I
>>>     need to clarify is that the RPL behavior in the spec is the one
>>>     expected in a RPL domain that supports mop 3 otherwise what is
>>>     done is out of scope for this doc.
>>>
>>>
>>>
>>>      Do you see it otherwise?
>>>
>>> [DT] I agree that only RPL mode 3 needs to be defined and other 
>>> modes are left out of scope.
>>>
>>>
>>>
>>>     I mean should the 6LR signal unicast to the root like for
>>>     unicast traffic when serving a RPL unaware leaf?
>>>
>>> [DT] That certainly could be an optimization for non-storing mode so 
>>> that a border-router might know what multicast groups to forward 
>>> from outside the network. Unfortunately though there is no MOP that 
>>> is "Non-storing with multicast", although one could argue semantics 
>>> and simply use MOP 1.
>>>
>>> [DT] If we were to opt for such behavior, 6LR nodes could simply add 
>>> RPL Target options to their DAO's, for the multicast groups they 
>>> were interested in (including those requested by leaf nodes).
>>>
>>>
>>>      If so wouldn’t it be expected that the Root makes n unicast to
>>>     all 6LRs that have listeners?
>>>
>>> [DT] I'm not sure that would make sense when MPL is being used, but 
>>> it makes for an interesting alternative to MPL.
>>>
>>>
>>>
>>>     Should we describe that mode as well?
>>>
>>> [DT] As an alternative to MPL? Sure.
>>>
>>>
>>>
>>>     Pascal
>>>
>>>         Regards
>>>
>>>         Dario
>>>
>>>
>>>
>>>             On Sep 27, 2021, at 6:32 AM, Pascal Thubert (pthubert)
>>>             <pthubert=40cisco.com@dmarc.ietf.org
>>>             <mailto:pthubert=40cisco.com@dmarc.ietf.org>> wrote:
>>>
>>>             Dear all:
>>>
>>>             This draft is a continuation of our work on RFC 8505,
>>>             8928, and 8929.
>>>
>>>             Comments welcome!
>>>
>>>             Pascal
>>>
>>>             -----Original Message-----
>>>             From: internet-drafts@ietf.org
>>>             <mailto:internet-drafts@ietf.org>
>>>             <internet-drafts@ietf.org
>>>             <mailto:internet-drafts@ietf.org>>
>>>             Sent: lundi 27 septembre 2021 15:29
>>>             To: Eric Levy- Abegnoli (elevyabe) <elevyabe@cisco.com
>>>             <mailto:elevyabe@cisco.com>>; Pascal Thubert (pthubert)
>>>             <pthubert@cisco.com <mailto:pthubert@cisco.com>>
>>>             Subject: New Version Notification for
>>>             draft-thubert-6lo-unicast-lookup-01.txt
>>>
>>>
>>>             A new version of I-D,
>>>             draft-thubert-6lo-unicast-lookup-01.txt
>>>             has been successfully submitted by Pascal Thubert and
>>>             posted to the IETF repository.
>>>
>>>             Name:draft-thubert-6lo-unicast-lookup
>>>             Revision:01
>>>             Title:IPv6 Neighbor Discovery Unicast Lookup
>>>             Document date:2021-09-27
>>>             Group:Individual Submission
>>>             Pages:15
>>>             URL:
>>>             https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt
>>>             Status:
>>>             https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/
>>>             Html:
>>>             https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html
>>>             Htmlized:
>>>             https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup
>>>             Diff:
>>>             https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01
>>>
>>>             Abstract:
>>>               This document updates RFC 8505 in order to enable
>>>             unicast address
>>>               lookup from a 6LoWPAN Border Router acting as an
>>>             Address Registrar.
>>>
>>>
>>>
>>>
>>>             The IETF Secretariat
>>>
>>>
>>>             _______________________________________________
>>>             6lo mailing list
>>>             6lo@ietf.org <mailto:6lo@ietf.org>
>>>             https://www.ietf.org/mailman/listinfo/6lo
>>>
>>


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    Comments in line below:<br>
    <br>
    <div class="moz-cite-prefix">On 10/6/21 1:09 PM, Pascal Thubert
      (pthubert) wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:6E59CFC3-A1EF-4C23-A97E-2F7545481679@cisco.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      Hello Dario
      <div><br>
      </div>
      <div><br>
        <br>
        <div dir="ltr">
          <div><br>
          </div>
        </div>
        <div dir="ltr"><br>
          <blockquote type="cite">Le 6 oct. 2021 à 21:50, Dario Tedeschi
            <a class="moz-txt-link-rfc2396E" href="mailto:dat@exegin.com">&lt;dat@exegin.com&gt;</a> a écrit :<br>
            <br>
          </blockquote>
        </div>
        <blockquote type="cite">
          <div dir="ltr">﻿ Hi Pascal,<br>
            <br>
            I think the 2nd and 4th cases can be merged, by allowing a
            root node to automatically propagate the following multicast
            messages, using MPL:<br>
            <ul>
              <li>All scope 3 (Realm-Local) multicast messages it either
                originates or receives on an MPL interface.
                <br>
              </li>
              <li>All Unicast-Prefix-based IPv6 Multicast Addresses (RFC
                3306) higher than scope 3, where the network prefix
                (given in the mulitcast destination address), matches
                the prefix of the DODAG ID (the RPL network's subnet).</li>
            </ul>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div><br>
        </div>
        WFM, conforms <a
          href="https://www.rfc-editor.org/rfc/rfc7346.html#section-5"
          moz-do-not-send="true">https://www.rfc-editor.org/rfc/rfc7346.html#section-5</a><br>
        <blockquote type="cite">
          <div dir="ltr">
            <ul>
            </ul>
            <p>Automatic forwarding of the 2nd address type could be
              optional and administratively configured.<br>
            </p>
            <p>If nodes are interested in other multicasts higher than
              scope 3, they must explicitly inform the root by sending
              DAO messages with appropriate Target Options.
              <br>
            </p>
            ---------<br>
            <br>
            The 3rd case, I think, needs its own mop code (i.e.
            "Non-storing mode with source-routed multicast").
            <br>
            <br>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div>Yes, but we have to look at backwards compatibility / brown
          field and allow though not recommend to use mop 1; same issue
          as already discussed with mop 3 in the dread</div>
        <br>
      </div>
    </blockquote>
    [DT] <br>
    OK I think I get it. So if mop is 1 and MPL is disabled or not
    present, your 3rd case description applies. Makes sense to me. <br>
    <br>
    It should however be clearly described in the doc. Perhaps something
    like: "In the absence of MPL, multicast datagrams are unicast and
    source-routed".<br>
    <br>
    <blockquote type="cite"
      cite="mid:6E59CFC3-A1EF-4C23-A97E-2F7545481679@cisco.com">
      <div>
        <blockquote type="cite">
          <div dir="ltr">For the 1st and 3rd cases, how do you envision
            multicasts propagating up the DODAG (towards the root)?
            Would a node simply L2 unicast to its preferred parent?<br>
            <br>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div>The 6 LN does. It know about RPL and registers the
          multicast address. Upon. The first registration The 6LR sends
          a unicast DAO to the Root as we do for RUL. This time though
          the address in the target is multicast. The root makes a copy
          per 6LR that shows as transit and sends along the unicast SR
          path to the 6 LR as it would for a RUL unicast. Less efficient
          that mop 3 that builds a real multicast tree, but backward
          compatible for for nodes on path…</div>
        <div><br>
        </div>
        <div>Works?</div>
      </div>
    </blockquote>
    <br>
    [DT] <br>
    Yes that seems fine, but I was actually more interested in multicast
    <b>datagrams</b> that originate from a 6LR node mid-way in the tree.
    How do such datagrams propagate up to the root?. I can see three
    possible methods:<br>
    <ol>
      <li>L2 unicast to the preferred parent at each hop</li>
      <li>Encapsulate the mcast datagram in a link-local unicast IPv6
        header at each hop, where the outer destination is the the
        link-local address of the preferred parent.<br>
      </li>
      <li>Encapsulate the mcast datagram in a route-able unicast IPv6
        header, where the outer destination is a global address of the
        root node and then allow normal IPv6 unicast forwarding to occur
        at each hop.<br>
      </li>
    </ol>
    <br>
    Options 2 and 3 allow for the addition of the RPL HbH option,
    without mutating the original packet and are similar to what
    existing RPL forwarders already do.<br>
    <br>
    Or is this already covered in some other RFC?<br>
    <br>
    <br>
    <blockquote type="cite"
      cite="mid:6E59CFC3-A1EF-4C23-A97E-2F7545481679@cisco.com">
      <div>
        <div><br>
        </div>
        <div>Pascal </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <br>
        <blockquote type="cite">
          <div dir="ltr">Regards<br>
            Dario<br>
            <br>
            <br>
            <div class="moz-cite-prefix">On 10/6/21 6:00 AM, Pascal
              Thubert (pthubert) wrote:<br>
            </div>
            <blockquote type="cite"
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              <div class="WordSection1">
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">OK Dario, so we’d have 4
                      optional combinations:<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">unicast = mop 1 multicast
                      = mop 3 (what the draft does today)<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">unicast = mop 1 multicast
                      = MPL (that I believe the draft allows today but
                      should clarify); in that mode, not message to the
                      Root, the root floods all multicast messages with
                      the idea that there’s always a listener somewhere<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">unicast = mop 1 multicast
                      = mop 1 (to be added) in that mode the 6LR sends a
                      DAO to the root for a multicast target, and the
                      Root sends n messages that are unicast source
                      routed to the n 6LR that have listeners, only the
                      last address in the SRH is multicast<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">unicast = mop 1 multicast
                      = MPL (that I believe the draft allows today but
                      should clarify); in that mode, in that mode the
                      6LR sends a DAO to the root for a multicast
                      target, and the root uses MPL only when there’s
                      known listeners<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Do we describe them all?
                      Should we consume RPL MOPs?<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">I suggested that AODV RPL
                      reuses MOP 4 to leave room…<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Pascal<o:p></o:p></span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                <div style="border:none;border-left:solid blue
                  1.5pt;padding:0cm 0cm 0cm 4.0pt">
                  <div>
                    <div style="border:none;border-top:solid #E1E1E1
                      1.0pt;padding:3.0pt 0cm 0cm 0cm">
                      <p class="MsoNormal"><b><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt;font-weight:bold">From:</span></font></b>
                        Dario Tedeschi
                        <a class="moz-txt-link-rfc2396E"
                          href="mailto:dat@exegin.com"
                          moz-do-not-send="true">&lt;dat@exegin.com&gt;</a>
                        <br>
                        <b><span style="font-weight:bold">Sent:</span></b>
                        mercredi 6 octobre 2021 0:05<br>
                        <b><span style="font-weight:bold">To:</span></b>
                        Pascal Thubert (pthubert) <a
                          class="moz-txt-link-rfc2396E"
                          href="mailto:pthubert@cisco.com"
                          moz-do-not-send="true">
                          &lt;pthubert@cisco.com&gt;</a><br>
                        <b><span style="font-weight:bold">Cc:</span></b>
                        <a class="moz-txt-link-abbreviated"
                          href="mailto:6lo@ietf.org"
                          moz-do-not-send="true">
                          6lo@ietf.org</a><br>
                        <b><span style="font-weight:bold">Subject:</span></b>
                        Re: [6lo] New Version Notification for
                        draft-thubert-6lo-unicast-lookup-01.txt<o:p></o:p></p>
                    </div>
                  </div>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                  <p class="MsoNormal" style="margin-bottom:12.0pt"><font
                      size="2" face="Calibri"><span
                        style="font-size:11.0pt">Hi Pascal<br>
                        <br>
                        See my comment  below.<o:p></o:p></span></font></p>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">On 10/5/21 12:40 PM,
                          Pascal Thubert (pthubert) wrote:<o:p></o:p></span></font></p>
                  </div>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <p class="MsoNormal"><font size="2" face="Calibri"><span
                          style="font-size:11.0pt">Hello Dario
                          <o:p></o:p></span></font></p>
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="margin-bottom:12.0pt"><font
                          size="2" face="Calibri"><span
                            style="font-size:11.0pt">Please see below;<o:p></o:p></span></font></p>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><br>
                              <br>
                              <o:p></o:p></span></font></p>
                        <blockquote
                          style="margin-top:5.0pt;margin-bottom:5.0pt">
                          <p class="MsoNormal"
                            style="margin-bottom:12.0pt"><font size="2"
                              face="Calibri"><span
                                style="font-size:11.0pt" lang="FR">Le 5
                                oct. 2021 à 20:15, Dario Tedeschi
                              </span><a href="mailto:dat@exegin.com"
                                moz-do-not-send="true"><span lang="FR">&lt;dat@exegin.com&gt;</span></a></font><span
                              lang="FR"> a écrit :<o:p></o:p></span></p>
                        </blockquote>
                      </div>
                      <blockquote
                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                        <div>
                          <p class="MsoNormal"><font size="2"
                              face="Calibri"><span
                                style="font-size:11.0pt">﻿ Hi Pascal,
                                <o:p></o:p></span></font></p>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">Thank you for
                                  new draft. However I do have some
                                  comments/questions.<o:p></o:p></span></font></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">What benefit
                                  does the ‘M’ bit provide over simply
                                  detecting a multicast address in the
                                  Target Address field?<o:p></o:p></span></font></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">The IPv6
                                  multicast address type is clearly
                                  defined in </span><a
                                  href="https://datatracker.ietf.org/doc/html/rfc4291#section-2.4"
                                  moz-do-not-send="true">RFC 4291
                                  (section 2.4)</a></font>, and the
                              detection of such an address is trivial.
                              Most (if not all) Stacks have a simple
                              function/macro to do that job and many
                              existing protocols already use this
                              mechanism to distinguish between unicast
                              and multicast addresses.  It seems to me
                              that a special bit to indicate multicast
                              registration would be redundant and
                              require handling for 4 different cases, 2
                              of which would be errors:<o:p></o:p></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                          <div>
                            <ul type="disc">
                              <li class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                                level1 lfo3">
                                <font size="2" face="Calibri"><span
                                    style="font-size:11.0pt">M = 1,
                                    Target = multicast addr<o:p></o:p></span></font></li>
                              <li class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                                level1 lfo3">
                                <font size="2" face="Calibri"><span
                                    style="font-size:11.0pt">M = 1,
                                    Target= unicast addr  — ERROR<o:p></o:p></span></font></li>
                              <li class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                                level1 lfo3">
                                <font size="2" face="Calibri"><span
                                    style="font-size:11.0pt">M = 0,
                                    Target = multicast addr — ERROR<o:p></o:p></span></font></li>
                              <li class="MsoNormal"
                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
                                level1 lfo3">
                                <font size="2" face="Calibri"><span
                                    style="font-size:11.0pt">M = 0,
                                    Target= unicast addr<o:p></o:p></span></font></li>
                            </ul>
                            <div>
                              <p class="MsoNormal"
                                style="margin-left:36.0pt"><font
                                  size="2" face="Calibri"><span
                                    style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                            </div>
                          </div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">True enough.
                              Dario.<o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">I’ve been
                              pondering that too. On the one hand it
                              seems cleaner to announce the service that
                              the 6LN expects. Otoh as you point out it
                              can be inferred from the address.<o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Another way of
                              seeing this is that the error cases that
                              you indicate can be detected if we have
                              the bit otherwise they can’t.<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] I take your point
                        about detecting the errors, assuming an
                        implementation could do something useful with
                        that knowledge, other than just discarding the
                        message.<br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Then there’s
                              anycast which is missing from both RPL and
                              ND , which cannot be distinguished by the
                              look of the address and thus requires a
                              bit.
                              <o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] As for the anycast
                        address, I suppose the question to ask is what
                        would a router do differently knowing such
                        information? I suspect we would have to define
                        some new behavior along with the new bit.<br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Then there’s
                              possibly the need of an IPv4 AF. All in
                              all I tended to favor having the bit but
                              that’s really not a strong position, happy
                              to be convinced otherwise.<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] I presume you are
                        talking of "IPv4-Compatible" and "IPv4-Mapped"
                        IPv6 addresses. If my presumption is correct,
                        aren't these still easily identifiable through
                        their unique prefixes (::/96 and ::ffff/96,
                        respectively)?<br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">What do others
                              think?<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] I have no strong
                        opinion. The M bit just seemed redundant.<br>
                        <br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <p class="MsoNormal"><font size="2" face="Calibri"><span
                            style="font-size:11.0pt"><br>
                            <br>
                            <o:p></o:p></span></font></p>
                      <blockquote
                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">I also wonder
                                  about the requirement for non-storing
                                  RPL networks to propagate multicast
                                  membership up the DODAG. My
                                  understanding is that non-storing
                                  networks typically use </span><a
                                  href="https://www.rfc-editor.org/rfc/rfc7731.html"
                                  moz-do-not-send="true">MPL (RFC 7731)</a></font> 
                              which does not need multicast memberships
                              to be propagated throughout the DODAG. It
                              uses a flooding mechanism to forward
                              multicast datagrams, and does not unicast
                              at L2. Could the new document accommodate
                              non-storing networks using MPL?<o:p></o:p></p>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Sure; <o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Bottom line here
                              is that for MPL all the multicast packets
                              of interest for the LLN are flooded
                              throughout so I suspect that there is no
                              need for the 6LR to signal to the root.<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] Yes, that's my
                        understanding as well.<br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><br>
                              <br>
                              <o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">If that’s the
                              case then there’s nothing to standardize.
                               All I need to clarify is that the RPL
                              behavior in the spec is the one expected
                              in a RPL domain that supports mop 3
                              otherwise what is done is out of scope for
                              this doc. <o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><br>
                              <br>
                              <o:p></o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"> Do you see it
                              otherwise?
                              <o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] I agree that only
                        RPL mode 3 needs to be defined and other modes
                        are left out of scope.<br>
                        <br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">I mean should the
                              6LR signal unicast to the root like for
                              unicast traffic when serving a RPL unaware
                              leaf?<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] That certainly
                        could be an optimization for non-storing mode so
                        that a border-router might know what multicast
                        groups to forward from outside the network.
                        Unfortunately though there is no MOP that is
                        "Non-storing with multicast", although one could
                        argue semantics and simply use MOP 1.
                        <br>
                        <br>
                        [DT] If we were to opt for such behavior, 6LR
                        nodes could simply add RPL Target options to
                        their DAO's, for the multicast groups they were
                        interested in (including those requested by leaf
                        nodes).<br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"> If so wouldn’t
                              it be expected that the Root makes n
                              unicast to all 6LRs that have listeners?<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] I'm not sure that
                        would make sense when MPL is being used, but it
                        makes for an interesting alternative to MPL.<br>
                        <br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Should we
                              describe that mode as well?<o:p></o:p></span></font></p>
                      </div>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt">[DT] As an alternative
                        to MPL? Sure.<br>
                        <br>
                        <br>
                        <br>
                        <o:p></o:p></span></font></p>
                  <blockquote
                    style="margin-top:5.0pt;margin-bottom:5.0pt">
                    <div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt">Pascal <o:p></o:p></span></font></p>
                      </div>
                      <blockquote
                        style="margin-top:5.0pt;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt">   <o:p></o:p></span></font></p>
                            <div>
                              <p class="MsoNormal"><font size="2"
                                  face="Calibri"><span
                                    style="font-size:11.0pt">Regards<o:p></o:p></span></font></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><font size="2"
                                  face="Calibri"><span
                                    style="font-size:11.0pt">Dario<o:p></o:p></span></font></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><font size="2"
                                  face="Calibri"><span
                                    style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><font size="2"
                                  face="Calibri"><span
                                    style="font-size:11.0pt"><br>
                                    <br>
                                    <o:p></o:p></span></font></p>
                              <blockquote
                                style="margin-top:5.0pt;margin-bottom:5.0pt">
                                <div>
                                  <p class="MsoNormal"><font size="2"
                                      face="Calibri"><span
                                        style="font-size:11.0pt">On Sep
                                        27, 2021, at 6:32 AM, Pascal
                                        Thubert (pthubert) &lt;</span><a
href="mailto:pthubert=40cisco.com@dmarc.ietf.org" moz-do-not-send="true">pthubert=40cisco.com@dmarc.ietf.org</a></font>&gt;
                                    wrote:<o:p></o:p></p>
                                </div>
                                <p class="MsoNormal"><font size="2"
                                    face="Calibri"><span
                                      style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                                <div>
                                  <div>
                                    <p class="MsoNormal"><font size="2"
                                        face="Calibri"><span
                                          style="font-size:11.0pt">Dear
                                          all:<br>
                                          <br>
                                          This draft is a continuation
                                          of our work on RFC 8505, 8928,
                                          and 8929.<br>
                                          <br>
                                          Comments welcome!<br>
                                          <br>
                                          Pascal<br>
                                          <br>
                                          -----Original Message-----<br>
                                          From: </span><a
                                          href="mailto:internet-drafts@ietf.org"
                                          moz-do-not-send="true">internet-drafts@ietf.org</a></font>
                                      &lt;<a
                                        href="mailto:internet-drafts@ietf.org"
                                        moz-do-not-send="true">internet-drafts@ietf.org</a>&gt;
                                      <br>
                                      Sent: lundi 27 septembre 2021
                                      15:29<br>
                                      To: Eric Levy- Abegnoli (elevyabe)
                                      &lt;<a
                                        href="mailto:elevyabe@cisco.com"
                                        moz-do-not-send="true">elevyabe@cisco.com</a>&gt;;
                                      Pascal Thubert (pthubert) &lt;<a
                                        href="mailto:pthubert@cisco.com"
                                        moz-do-not-send="true">pthubert@cisco.com</a>&gt;<br>
                                      Subject: New Version Notification
                                      for
                                      draft-thubert-6lo-unicast-lookup-01.txt<br>
                                      <br>
                                      <br>
                                      A new version of I-D,
                                      draft-thubert-6lo-unicast-lookup-01.txt<br>
                                      has been successfully submitted by
                                      Pascal Thubert and posted to the
                                      IETF repository.<br>
                                      <br>
                                      Name:<span class="apple-tab-span">
                                      </span>draft-thubert-6lo-unicast-lookup<br>
                                      Revision:<span
                                        class="apple-tab-span"> </span>01<br>
                                      Title:<span class="apple-tab-span">
                                      </span>IPv6 Neighbor Discovery
                                      Unicast Lookup<br>
                                      Document date:<span
                                        class="apple-tab-span"> </span>2021-09-27<br>
                                      Group:<span class="apple-tab-span">
                                      </span>Individual Submission<br>
                                      Pages:<span class="apple-tab-span">
                                      </span>15<br>
                                      URL:            <a
href="https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt"
                                        moz-do-not-send="true">https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.txt</a><br>
                                      Status:         <a
href="https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/"
                                        moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-thubert-6lo-unicast-lookup/</a><br>
                                      Html:           <a
href="https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html"
                                        moz-do-not-send="true">https://www.ietf.org/archive/id/draft-thubert-6lo-unicast-lookup-01.html</a><br>
                                      Htmlized:       <a
href="https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup"
                                        moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-thubert-6lo-unicast-lookup</a><br>
                                      Diff:           <a
href="https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01"
                                        moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-thubert-6lo-unicast-lookup-01</a><br>
                                      <br>
                                      Abstract:<br>
                                        This document updates RFC 8505
                                      in order to enable unicast address<br>
                                        lookup from a 6LoWPAN Border
                                      Router acting as an Address
                                      Registrar.<br>
                                      <br>
                                      <br>
                                      <br>
                                      <br>
                                      The IETF Secretariat<br>
                                      <br>
                                      <br>
_______________________________________________<br>
                                      6lo mailing list<br>
                                      <a href="mailto:6lo@ietf.org"
                                        moz-do-not-send="true">6lo@ietf.org</a><br>
                                      <a
                                        href="https://www.ietf.org/mailman/listinfo/6lo"
                                        moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/6lo</a><o:p></o:p></p>
                                  </div>
                                </div>
                              </blockquote>
                            </div>
                            <p class="MsoNormal"><font size="2"
                                face="Calibri"><span
                                  style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                          </div>
                        </div>
                      </blockquote>
                    </div>
                  </blockquote>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt"><o:p> </o:p></span></font></p>
                </div>
              </div>
            </blockquote>
            <br>
          </div>
        </blockquote>
      </div>
    </blockquote>
    <br>
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Éric Vyncke has entered the following ballot position for
draft-ietf-roll-aodv-rpl-11: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

***Thank you for having addressed all my points raised during the IESG ballot
of 2021-04-21 with the revised I-D*** (BTW, never hesitate to nudge an AD in
the absence of action, I only reacted when processing my pending DISCUSS today
:-( ... )

Thank you for the work put into this document. I seems that all cases have been
thought of :-) Good job! and having a shorter path between two RPL nodes can be
beneficial of course.

Special thanks to Peter Van der Stock for the IoT directorate review:
https://datatracker.ietf.org/doc/review-ietf-roll-aodv-rpl-10-iotdir-telechat-van-der-stok-2021-04-15/

Minor regret on the age of the document shepherd's write-up dated 2 years ago
and about the -06 version. Little is said about the WG consensus. But, I am
trusting the responsible AD on the consensus.

I hope that this helps to improve the document,

Regards,

-éric

== PREVIOUS DISCUSS (for archive) ==

A very trivial to fix but I do want to have a justification of using
"point-to-point" (typically used over the two sides of a single link) vs.
"peer-to-peer" (typically used over multiple links). Is it intentional by the
ROLL WG ? Did I fail to understand the purpose of this document ? (quite
possible of course!). I am afraid that many people will interpret the
"point-to-point" like me.

== PREVIOUS COMMENTS (for archive) ==

-- Section 4.3 --
Figure 3 has a 'X' while the text has a 'r' ;)

Any reason why using "Floor((7+(Prefix Length))/8) octets" rather than the
simple "Ceil(Prefix Length/8)" ?

-- Section 6.1 --
"Each node maintains a sequence number" does it impact constrained nodes ?




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To: Alvaro Retana <aretana.ietf@gmail.com>, "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>
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Thread-Topic: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>,  "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>
Cc: Routing Over Low power and Lossy networks <roll@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/Ksd8QEUE06qjvRfzQCWj7Elr7YQ>
Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Hi!

Yes, we do need to hear from the authors, who=E2=80=99ll need to eventually=
 make
any needed changes.

If we=E2=80=99re moving forward with using MOP 4, then this is what we woul=
d need
(at least):

- IANA Considerations: request to add aodv-rpl as a reference in the
registry.

- A new section that talks about how the reuse is ok, and any consequences
of overlapping.  A requirement to not use both variations in the same
network would be fine too.


I will rely on the Chairs to decide if the discussion is enough to reach
consensus on the path forward.


Thanks!

Alvaro.

On October 8, 2021 at 8:08:09 AM, Pascal Thubert (pthubert) (
pthubert@cisco.com) wrote:

Hello Alvaro:



I read from the parallel thread that sharing MOP 4 between the 2 reactive
versions of RPL would be OK.

I did not see a response from the authors so I=E2=80=99m cc=E2=80=99ing the=
 draft .all list
just in case.

We do not need to deprecate P2P RPL as long as it is never present in the
same network as AODV RPL.

Maybe a  sentence in AODV RPL about that in the IANA section would help?



Keep safe;

Pascal



*From:* Alvaro Retana <aretana.ietf@gmail.com>
*Sent:* mercredi 6 octobre 2021 12:59
*To:* Pascal Thubert (pthubert) <pthubert@cisco.com>
*Cc:* Routing Over Low power and Lossy networks <roll@ietf.org>
*Subject:* Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)



[Added the draft name to the subject to benefit my filters. ;-) ]



Pascal:



Hi!



I asked the same question (about aodv-rpl replacing/obsoleting rfc6997)
when I did my review [1] =E2=80=94 more than two years ago!  But sadly rece=
ived no
real reply from the WG =E2=80=94 so we moved ahead with the document as it =
is now.
Peter brought the question back in his IoT DIT review [2] earlier this
year, but again no discussion from the WG.



It is clear to see that aodv-rpl uses some of the technology from rfc6997
and, as I understand it, a deployment would never include both.  The
question then is valid and I would love to see more interest this time
around.



Just FYI =E2=80=94 there would need to be some process behind a move to for=
mally
replace rfc6997 (beyond updating the draft).  We can deal with that if we
need to.



Thanks!



Alvaro.





[1] https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/

[2]
https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8=
930ZYI/


On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (
pthubert=3D40cisco.com@dmarc.ietf.org) wrote:

Dear all,



RPL AODV is close to completion, congrats to the authors!

Now, there=E2=80=99s the question of the MOP and 2 options, reuse the exper=
imental
one for P2P RPL, or take another.



Right now, the draft takes 5 and P2P has 4 (
https://www.iana.org/assignments/rpl/rpl.xhtml#mop)



My observation is that P2P is the experiment that leads to AODV, so AODV
should deprecate it.



I have not heard of real deployments, and if that happened, I do not expect
a mix of devices that would create confusion.

So would that be OK to assign MOP 4 to RPL AODV?



Note that we only have up to 6 to play with, and the multicast and anycast
supports are already on the cooking table.



Keep safe,



Pascal



_______________________________________________
Roll mailing list
Roll@ietf.org
https://www.ietf.org/mailman/listinfo/roll

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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body><div style=3D"font-family:Helvetica,Arial;font-size:13px">Hi!<=
/div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><d=
iv style=3D"font-family:Helvetica,Arial;font-size:13px">Yes, we do need to =
hear from the authors, who=E2=80=99ll need to eventually make any needed ch=
anges.</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br><=
/div><div style=3D"font-family:Helvetica,Arial;font-size:13px">If we=E2=80=
=99re moving forward with using MOP 4, then this is what we would need (at =
least):</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br>=
</div><div style=3D"font-family:Helvetica,Arial;font-size:13px">- IANA Cons=
iderations: request to add aodv-rpl as a reference in the registry.</div><d=
iv style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div styl=
e=3D"font-family:Helvetica,Arial;font-size:13px">- A new section that talks=
 about how the reuse is ok, and any consequences of overlapping.=C2=A0 A re=
quirement to not use both variations in the same network would be fine too.=
</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><=
div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div sty=
le=3D"font-family:Helvetica,Arial;font-size:13px">I will rely on the Chairs=
 to decide if the discussion is enough to reach consensus on the path forwa=
rd.</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></di=
v><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div =
style=3D"font-family:Helvetica,Arial;font-size:13px">Thanks!</div><div styl=
e=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=3D"fo=
nt-family:Helvetica,Arial;font-size:13px">Alvaro.</div> <br><p class=3D"air=
mail_on">On October 8, 2021 at 8:08:09 AM, Pascal Thubert (pthubert) (<a hr=
ef=3D"mailto:pthubert@cisco.com">pthubert@cisco.com</a>) wrote:</p> <blockq=
uote type=3D"cite" class=3D"clean_bq"><span><div lang=3D"EN-US" link=3D"blu=
e" vlink=3D"purple" style=3D"word-wrap:break-word"><div></div><div>






<div class=3D"WordSection1">
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Hello Alvaro:</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">I read from the parallel thread that sharing MOP 4 between t=
he 2 reactive versions of RPL would be OK.
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">I did not see a response from the authors so I=E2=80=99m cc=
=E2=80=99ing the draft .all list just in case.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">We do not need to deprecate P2P RPL as long as it is never p=
resent in the same network as AODV RPL.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Maybe a=C2=A0 sentence in AODV RPL about that in the IANA se=
ction would help?</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Keep safe;</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Pascal</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">=C2=A0</span></font></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><font size=3D"2" face=3D"Calibri"><span style=3D"=
font-size:11.0pt;font-weight:bold">From:</span></font></b> Alvaro Retana &l=
t;<a href=3D"mailto:aretana.ietf@gmail.com">aretana.ietf@gmail.com</a>&gt;
<br>
<b><span style=3D"font-weight:bold">Sent:</span></b> mercredi 6 octobre 202=
1 12:59<br>
<b><span style=3D"font-weight:bold">To:</span></b> Pascal Thubert (pthubert=
) &lt;<a href=3D"mailto:pthubert@cisco.com">pthubert@cisco.com</a>&gt;<br>
<b><span style=3D"font-weight:bold">Cc:</span></b> Routing Over Low power a=
nd Lossy networks &lt;<a href=3D"mailto:roll@ietf.org">roll@ietf.org</a>&gt=
;<br>
<b><span style=3D"font-weight:bold">Subject:</span></b> Re: [Roll] Which MO=
P for RPL AODV? (draft-ietf-roll-aodv-rpl)</p>
</div>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">=C2=A0</span></font></p>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[Added the dr=
aft name to the subject to benefit my filters. ;-) ]</span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Pascal:</span=
></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Hi!</span></f=
ont></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">I asked the s=
ame question (about aodv-rpl replacing/obsoleting rfc6997) when I did my re=
view [1] =E2=80=94 more than two years ago!=C2=A0 But sadly received
 no real reply from the WG =E2=80=94 so we moved ahead with the document as=
 it is now.=C2=A0 Peter brought the question back in his IoT DIT review [2]=
 earlier this year, but again no discussion from the WG.</span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">It is clear t=
o see that aodv-rpl uses some of the technology from rfc6997 and, as I unde=
rstand it, a deployment would never include both.=C2=A0
 The question then is valid and I would love to see more interest this time=
 around.</span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Just FYI =E2=
=80=94 there would need to be some process behind a move to formally replac=
e rfc6997 (beyond updating the draft).=C2=A0 We can deal with that
 if we need to.</span></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Thanks!</span=
></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Alvaro.</span=
></font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">=C2=A0</span>=
</font></p>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[1]=C2=A0<a h=
ref=3D"https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLye=
ec/">https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec=
/</a>=C2=A0</span></font></p>
<div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[2]=C2=A0<a h=
ref=3D"https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1G=
KjQFqS8930ZYI/">https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUl=
TDX4ppY1GKjQFqS8930ZYI/</a>=C2=A0</span></font></p>
<p class=3D"airmailon"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">On October 6,=
 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (<a href=3D"mailto:pthubert=
=3D40cisco.com@dmarc.ietf.org">pthubert=3D40cisco.com@dmarc.ietf.org</a>)
 wrote:</span></font></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Dea=
r all,
</span></font><font size=3D"2" face=3D"Helvetica"><span style=3D"font-size:=
10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">=C2=
=A0</span></font><font size=3D"2" face=3D"Helvetica"><span style=3D"font-si=
ze:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">RPL=
 AODV is close to completion, congrats to the authors!</span></font><font s=
ize=3D"2" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&q=
uot;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Now=
, there=E2=80=99s the question of the MOP and 2 options, reuse
 the experimental one for P2P RPL, or take another.</span></font><font size=
=3D"2" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot=
;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">=C2=
=A0</span></font><font size=3D"2" face=3D"Helvetica"><span style=3D"font-si=
ze:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" color=3D"#666666" face=3D"Arial"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Rig=
ht now, the draft takes 5 and P2P has 4 (<a href=3D"https://www.iana.org/as=
signments/rpl/rpl.xhtml#mop">https://www.iana.org/assignments/rpl/rpl.xhtml=
#mop</a></span></font><font size=3D"2" face=3D"Arial"><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Arial&quot;,sans-serif">)</span></font><font s=
ize=3D"2" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&q=
uot;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">My observation is that P2P is the e=
xperiment that leads to AODV, so AODV should deprecate
 it. </span></font><font size=3D"2" face=3D"Helvetica"><span style=3D"font-=
size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p=
>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">I have not heard of real deployment=
s, and if that happened, I do not expect a mix of devices
 that would create confusion.</span></font><font size=3D"2" face=3D"Helveti=
ca"><span style=3D"font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-=
serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">So would that be OK to assign MOP 4=
 to RPL AODV?</span></font><font size=3D"2" face=3D"Helvetica"><span style=
=3D"font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span><=
/font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">Note that we only have up to 6 to p=
lay with, and the multicast and anycast supports are
 already on the cooking table.</span></font><font size=3D"2" face=3D"Helvet=
ica"><span style=3D"font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans=
-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">Keep safe,</span></font><font size=
=3D"2" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot=
;Helvetica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">=C2=A0</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Arial"><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Arial&quot;,sans-serif">Pascal</span></font><font size=3D"2=
" face=3D"Helvetica"><span style=3D"font-size:10.0pt;font-family:&quot;Helv=
etica&quot;,sans-serif"></span></font></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><font size=3D"2" face=3D"Calibri"><span style=3D"font-size:11.0pt"=
>=C2=A0</span></font><font size=3D"2" face=3D"Helvetica"><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font><=
/p>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Helvetica"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">_____________=
__________________________________
<br>
Roll mailing list <br>
<a href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a> <br>
<a href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org=
/mailman/listinfo/roll</a>
</span></font></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>


</div></div></span></blockquote> <div class=3D"gmail_signature"></div></bod=
y></html>

--000000000000dfe38705cdd836b2--


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Subject: [Roll] Constrained Node/Network Cluster @ IETF112: DRAFT AGENDA
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Here is my usual eclectic condensed agenda based on the DRAFT AGENDA
for IETF112.  Remember that there is still quite some potential for
changes.

The IoT-relevant conflicts that most meet the eye this time are
ASDF/LAKE/RATS and IOTOPS/COSE.

All times are in UTC.
Note that the first week in November (W44) is the Week of Confusion,
where DST has ended in Europe but not yet in North America.
https://datatracker.ietf.org/meeting/agenda-utc might be handy.

Gr=C3=BC=C3=9Fe, Carsten

(### DST ENDS IN EUROPE ###)

MONDAY, November 1, 2021

1500-1600  Hackathon Kickoff
Rm 1    	GEN	hackathon	Hackathon

WEDNESDAY, November 3, 2021

1330-1500  IETF Plenary - Plenary

FRIDAY, November 5, 2021

1500-1700  Hackathon Closing
Rm 1    	GEN	hackathon	Hackathon

(### DST ENDS IN NORTH AMERICA ###)

MONDAY, November 8, 2021

1200-1400  Session I
Rm 1    	ART	dispatch	Dispatch WG - Joint with ARTAREA
Rm 6    	SEC ***	rats	Remote ATtestation ProcedureS WG
Rm 7    	TSV	masque	Multiplexed Application Substrate over =
QUIC Encryption WG

1430-1530  Session II
Rm 2    	INT ***	6lo	IPv6 over Networks of =
Resource-constrained Nodes WG
Rm 5    	RTG	rift	Routing In Fat Trees WG
Rm 7    	SEC ***	suit	Software Updates for Internet of Things =
WG
Rm 8    	TSV	tsvwg	Transport Area Working Group WG

1600-1800  Session III
Rm 1    	ART ***	core	Constrained RESTful Environments WG
Rm 3    	INT	madinas	MAC Address Device Identification for =
Network and Application Services WG

TUESDAY, November 9, 2021

1200-1400  Session I
Rm 1    	ART	webtrans	WebTransport WG
Rm 2    	INT	add	Adaptive DNS Discovery WG
Rm 6    	RTG	raw	Reliable and Available Wireless WG
Rm 7    	SEC	secdispatch	Security Dispatch WG

1430-1530  Session II
Rm 1    	ART	sedate	Serialising Extended Data About Times =
and Events WG
Rm 2    	INT ***	lpwan	IPv6 over Low Power Wide-Area Networks =
WG
Rm 3    	IRTF	maprg	Measurement and Analysis for Protocols
Rm 6    	SEC ***	ace	Authentication and Authorization for =
Constrained Environments WG

1600-1800  Session III
Rm 3    	INT	6man	IPv6 Maintenance WG
Rm 4    	IRTF	irtfopen	IRTF Open Meeting
Rm 8    	SEC	tls	Transport Layer Security WG

WEDNESDAY, November 10, 2021

1200-1400  Session I
Rm 2    	ART	jsonpath	JSON Path WG
Rm 3    	INT	intarea	Internet Area Working Group WG
Rm 6    	RTG	detnet	Deterministic Networking WG
Rm 8    	TSV	quic	QUIC WG

1430-1530  Session II
Rm 2    	ART	uta	Using TLS in Applications WG
Rm 4    	RTG	babel	Babel routing protocol WG
Rm 6    	RTG ***	roll	Routing Over Low power and Lossy =
networks WG
Rm 7    	SEC	openpgp	Open Specification for Pretty Good =
Privacy WG
Rm 8    	TSV	tsvarea	Transport Area Open Meeting

1600-1800  Session III
Rm 1    	ART	wpack	Web Packaging WG
Rm 3    	OPS	anima	Autonomic Networking Integrated Model =
and Approach WG

THURSDAY, November 11, 2021

1200-1400  Session I
Rm 3    	IRTF	cfrg	Crypto Forum
Rm 4    	IRTF	coinrg	Computing in the Network Research Group
Rm 7    	SEC	gnap	Grant Negotiation and Authorization =
Protocol WG

1430-1530  Session II
Rm 1    	ART ***	cbor	Concise Binary Object Representation =
Maintenance and Extensions WG
Rm 3    	INT ***	drip	Drone Remote ID Protocol WG
Rm 4    	IRTF	pearg	Privacy Enhancements and Assessments =
Research Group
Rm 6    	OPS	v6ops	IPv6 Operations WG
Rm 7    	RTG	bier	Bit Indexed Explicit Replication WG
Rm 8    	SEC	acme	Automated Certificate Management =
Environment WG

1600-1800  Session III
Rm 2    	IRTF	panrg	Path Aware Networking RG
Rm 6    	SEC	saag	Security Area Open Meeting

FRIDAY, November 12, 2021

1200-1400  Session I
Rm 2    	ART	httpapi	Building Blocks for HTTP APIs WG
Rm 4    	OPS	v6ops	IPv6 Operations WG - Joint with 6MAN
Rm 6    	SEC	dance	DANE Authentication for Network Clients =
Everywhere WG
Rm 7    	SEC ***	teep	Trusted Execution Environment =
Provisioning WG

1430-1530  Session II
Rm 1    	ART ***	asdf	A Semantic Definition Format for Data =
and Interactions of Things WG
Rm 5    	RTG	rtgarea	Routing Area Open Meeting
Rm 6    	SEC ***	lake	Lightweight Authenticated Key Exchange =
WG
Rm 7    	SEC ***	rats	Remote ATtestation ProcedureS WG
Rm 8    	TSV	rmcat	RTP Media Congestion Avoidance =
Techniques WG

1600-1700  Session III
Rm 3    	INT	dnssd	Extensions for Scalable DNS Service =
Discovery WG
Rm 4    	OPS ***	iotops	IOT Operations WG
Rm 7    	SEC ***	cose	CBOR Object Signing and Encryption WG
Rm 8    	TSV	tsvwg	Transport Area Working Group WG



From nobody Sun Oct 10 05:46:39 2021
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To: Alvaro Retana <aretana.ietf@gmail.com>, "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>
Cc: Routing Over Low power and Lossy networks <roll@ietf.org>
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From: Charlie Perkins <charles.perkins@earthlink.net>
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Hello folks,

I think it would be just fine to use the value of 4 for the MOP. Are 
there other changes, besides those noted below, that are needed to be 
made before issuing a new revision for the draft?

Naturally Yours,
Charlie P.


On 10/8/2021 7:30 AM, Alvaro Retana wrote:
> Hi!
>
> Yes, we do need to hear from the authors, who’ll need to eventually 
> make any needed changes.
>
> If we’re moving forward with using MOP 4, then this is what we would 
> need (at least):
>
> - IANA Considerations: request to add aodv-rpl as a reference in the 
> registry.
>
> - A new section that talks about how the reuse is ok, and any 
> consequences of overlapping.  A requirement to not use both variations 
> in the same network would be fine too.
>
>
> I will rely on the Chairs to decide if the discussion is enough to 
> reach consensus on the path forward.
>
>
> Thanks!
>
> Alvaro.
>
> On October 8, 2021 at 8:08:09 AM, Pascal Thubert (pthubert) 
> (pthubert@cisco.com <mailto:pthubert@cisco.com>) wrote:
>
>> Hello Alvaro:
>>
>> I read from the parallel thread that sharing MOP 4 between the 2 
>> reactive versions of RPL would be OK.
>>
>> I did not see a response from the authors so I’m cc’ing the draft 
>> .all list just in case.
>>
>> We do not need to deprecate P2P RPL as long as it is never present in 
>> the same network as AODV RPL.
>>
>> Maybe a  sentence in AODV RPL about that in the IANA section would help?
>>
>> Keep safe;
>>
>> Pascal
>>
>> *From:* Alvaro Retana <aretana.ietf@gmail.com 
>> <mailto:aretana.ietf@gmail.com>>
>> *Sent:* mercredi 6 octobre 2021 12:59
>> *To:* Pascal Thubert (pthubert) <pthubert@cisco.com 
>> <mailto:pthubert@cisco.com>>
>> *Cc:* Routing Over Low power and Lossy networks <roll@ietf.org 
>> <mailto:roll@ietf.org>>
>> *Subject:* Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
>>
>> [Added the draft name to the subject to benefit my filters. ;-) ]
>>
>> Pascal:
>>
>> Hi!
>>
>> I asked the same question (about aodv-rpl replacing/obsoleting 
>> rfc6997) when I did my review [1] — more than two years ago!  But 
>> sadly received no real reply from the WG — so we moved ahead with the 
>> document as it is now.  Peter brought the question back in his IoT 
>> DIT review [2] earlier this year, but again no discussion from the WG.
>>
>> It is clear to see that aodv-rpl uses some of the technology from 
>> rfc6997 and, as I understand it, a deployment would never include 
>> both. The question then is valid and I would love to see more 
>> interest this time around.
>>
>> Just FYI — there would need to be some process behind a move to 
>> formally replace rfc6997 (beyond updating the draft).  We can deal 
>> with that if we need to.
>>
>> Thanks!
>>
>> Alvaro.
>>
>> [1] 
>> https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/ 
>> <https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/> 
>>
>>
>> [2] 
>> https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/ 
>> <https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/> 
>>
>>
>> On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) 
>> (pthubert=40cisco.com@dmarc.ietf.org 
>> <mailto:pthubert=40cisco.com@dmarc.ietf.org>) wrote:
>>
>>     Dear all,
>>
>>     RPL AODV is close to completion, congrats to the authors!
>>
>>     Now, there’s the question of the MOP and 2 options, reuse the
>>     experimental one for P2P RPL, or take another.
>>
>>     Right now, the draft takes 5 and P2P has 4
>>     (https://www.iana.org/assignments/rpl/rpl.xhtml#mop
>>     <https://www.iana.org/assignments/rpl/rpl.xhtml#mop>)
>>
>>     My observation is that P2P is the experiment that leads to AODV,
>>     so AODV should deprecate it.
>>
>>     I have not heard of real deployments, and if that happened, I do
>>     not expect a mix of devices that would create confusion.
>>
>>     So would that be OK to assign MOP 4 to RPL AODV?
>>
>>     Note that we only have up to 6 to play with, and the multicast
>>     and anycast supports are already on the cooking table.
>>
>>     Keep safe,
>>
>>     Pascal
>>
>>     _______________________________________________
>>     Roll mailing list
>>     Roll@ietf.org <mailto:Roll@ietf.org>
>>     https://www.ietf.org/mailman/listinfo/roll
>>     <https://www.ietf.org/mailman/listinfo/roll>
>>


--------------2A6F54E91223BD0A91E96A3B
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    Hello folks,<br>
    <br>
    I think it would be just fine to use the value of 4 for the MOP. 
    Are there other changes, besides those noted below, that are needed
    to be made before issuing a new revision for the draft?<br>
    <br>
    Naturally Yours,<br>
    Charlie P.<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 10/8/2021 7:30 AM, Alvaro Retana
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAMMESsyeM4Dfy4yQBKitNcfaS7E=2-x8Ly2hLnbmBHcFvg7rrw@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <style>body{font-family:Helvetica,Arial;font-size:13px}</style>
      <div style="font-family:Helvetica,Arial;font-size:13px">Hi!</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">Yes, we do
        need to hear from the authors, who’ll need to eventually make
        any needed changes.</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">If we’re
        moving forward with using MOP 4, then this is what we would need
        (at least):</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">- IANA
        Considerations: request to add aodv-rpl as a reference in the
        registry.</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">- A new
        section that talks about how the reuse is ok, and any
        consequences of overlapping.  A requirement to not use both
        variations in the same network would be fine too.</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">I will
        rely on the Chairs to decide if the discussion is enough to
        reach consensus on the path forward.</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">Thanks!</div>
      <div style="font-family:Helvetica,Arial;font-size:13px"><br>
      </div>
      <div style="font-family:Helvetica,Arial;font-size:13px">Alvaro.</div>
      <br>
      <p class="airmail_on">On October 8, 2021 at 8:08:09 AM, Pascal
        Thubert (pthubert) (<a href="mailto:pthubert@cisco.com"
          moz-do-not-send="true">pthubert@cisco.com</a>) wrote:</p>
      <blockquote type="cite" class="clean_bq"><span>
          <div link="blue" vlink="purple" style="word-wrap:break-word"
            lang="EN-US">
            <div>
              <div class="WordSection1">
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Hello Alvaro:</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"> </span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">I read from the parallel
                      thread that sharing MOP 4 between the 2 reactive
                      versions of RPL would be OK.
                    </span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">I did not see a response
                      from the authors so I’m cc’ing the draft .all list
                      just in case.</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">We do not need to
                      deprecate P2P RPL as long as it is never present
                      in the same network as AODV RPL.</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Maybe a  sentence in AODV
                      RPL about that in the IANA section would help?</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"> </span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Keep safe;</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt">Pascal</span></font></p>
                <p class="MsoNormal"><font size="2" face="Calibri"><span
                      style="font-size:11.0pt"> </span></font></p>
                <div style="border:none;border-left:solid blue
                  1.5pt;padding:0cm 0cm 0cm 4.0pt">
                  <div>
                    <div style="border:none;border-top:solid #e1e1e1
                      1.0pt;padding:3.0pt 0cm 0cm 0cm">
                      <p class="MsoNormal"><b><font size="2"
                            face="Calibri"><span
                              style="font-size:11.0pt;font-weight:bold">From:</span></font></b>
                        Alvaro Retana &lt;<a
                          href="mailto:aretana.ietf@gmail.com"
                          moz-do-not-send="true">aretana.ietf@gmail.com</a>&gt;
                        <br>
                        <b><span style="font-weight:bold">Sent:</span></b>
                        mercredi 6 octobre 2021 12:59<br>
                        <b><span style="font-weight:bold">To:</span></b>
                        Pascal Thubert (pthubert) &lt;<a
                          href="mailto:pthubert@cisco.com"
                          moz-do-not-send="true">pthubert@cisco.com</a>&gt;<br>
                        <b><span style="font-weight:bold">Cc:</span></b>
                        Routing Over Low power and Lossy networks &lt;<a
                          href="mailto:roll@ietf.org"
                          moz-do-not-send="true">roll@ietf.org</a>&gt;<br>
                        <b><span style="font-weight:bold">Subject:</span></b>
                        Re: [Roll] Which MOP for RPL AODV?
                        (draft-ietf-roll-aodv-rpl)</p>
                    </div>
                  </div>
                  <p class="MsoNormal"><font size="2" face="Calibri"><span
                        style="font-size:11.0pt"> </span></font></p>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[Added
                          the draft name to the subject to benefit my
                          filters. ;-) ]</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Pascal:</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Hi!</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">I
                          asked the same question (about aodv-rpl
                          replacing/obsoleting rfc6997) when I did my
                          review [1] — more than two years ago!  But
                          sadly received no real reply from the WG — so
                          we moved ahead with the document as it is
                          now.  Peter brought the question back in his
                          IoT DIT review [2] earlier this year, but
                          again no discussion from the WG.</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">It
                          is clear to see that aodv-rpl uses some of the
                          technology from rfc6997 and, as I understand
                          it, a deployment would never include both. 
                          The question then is valid and I would love to
                          see more interest this time around.</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Just
                          FYI — there would need to be some process
                          behind a move to formally replace rfc6997
                          (beyond updating the draft).  We can deal with
                          that if we need to.</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Thanks!</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Alvaro.</span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"> </span></font></p>
                  </div>
                  <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[1] <a
href="https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/"
                          moz-do-not-send="true">https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/</a> </span></font></p>
                  <div>
                    <p class="MsoNormal"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">[2] <a
href="https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/"
                            moz-do-not-send="true">https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/</a> </span></font></p>
                    <p class="airmailon"><font size="2" face="Helvetica"><span
style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif">On
                          October 6, 2021 at 2:29:30 AM, Pascal Thubert
                          (pthubert) (<a
                            href="mailto:pthubert=40cisco.com@dmarc.ietf.org"
                            moz-do-not-send="true">pthubert=40cisco.com@dmarc.ietf.org</a>)
                          wrote:</span></font></p>
                    <blockquote
                      style="margin-top:5.0pt;margin-bottom:5.0pt">
                      <div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Dear
                                  all,
                                </span></font><font size="2"
                                face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">RPL
                                  AODV is close to completion, congrats
                                  to the authors!</span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Now,
                                  there’s the question of the MOP and 2
                                  options, reuse the experimental one
                                  for P2P RPL, or take another.</span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial" color="#666666"><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif;color:#666666">Right
                                  now, the draft takes 5 and P2P has 4 (<a
href="https://www.iana.org/assignments/rpl/rpl.xhtml#mop"
                                    moz-do-not-send="true">https://www.iana.org/assignments/rpl/rpl.xhtml#mop</a></span></font><font
                                size="2" face="Arial"><span
                                  style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif">)</span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">My
                                  observation is that P2P is the
                                  experiment that leads to AODV, so AODV
                                  should deprecate it. </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">I
                                  have not heard of real deployments,
                                  and if that happened, I do not expect
                                  a mix of devices that would create
                                  confusion.</span></font><font size="2"
                                face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">So
                                  would that be OK to assign MOP 4 to
                                  RPL AODV?</span></font><font size="2"
                                face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Note
                                  that we only have up to 6 to play
                                  with, and the multicast and anycast
                                  supports are already on the cooking
                                  table.</span></font><font size="2"
                                face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Keep
                                  safe,</span></font><font size="2"
                                face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif"> </span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Arial"><span
                                  style="font-size:11.0pt;font-family:&quot;Arial&quot;,sans-serif">Pascal</span></font><font
                                size="2" face="Helvetica"><span
                                  style="font-size:10.0pt;font-family:&quot;Helvetica&quot;,sans-serif"></span></font></p>
                            <p class="MsoNormal"
                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><font
                                size="2" face="Calibri"><span
                                  style="font-size:11.0pt"> </span></font><font
                                size="2" face="Helvetica"><span
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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Alvaro Retana <aretana.ietf@gmail.com>, "Pascal Thubert \(pthubert\)" <pthubert@cisco.com>, "draft-ietf-roll-aodv-rpl.all\@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>,  Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Alvaro Retana <aretana.ietf@gmail.com> wrote:
    > If we=E2=80=99re moving forward with using MOP 4, then this is what w=
e would need
    > (at least):

    > - IANA Considerations: request to add aodv-rpl as a reference in the
    > registry.

    > - A new section that talks about how the reuse is ok, and any consequ=
ences
    > of overlapping.  A requirement to not use both variations in the same
    > network would be fine too.

Is there an upgrade consideration if we re-use?
We could also allocate a new MOP, and deprecate MOP 4, and reuse it later o=
n.

My belief is that there are few deployments of P2P RPL today, and that a
forklift upgrade of them is acceptable.


=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: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>
CC: Alvaro Retana <aretana.ietf@gmail.com>, "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>, "Routing Over Low power and Lossy networks" <roll@ietf.org>
Thread-Topic: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY>
Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    > As long as no one forms a network that has both that should not be a
    > problem, should it?

The concern would be if someone was upgrading.
I don't think that there is enough deployment for this to matter.


=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 Oct 11 08:44:14 2021
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Date: Mon, 11 Oct 2021 17:42:45 +0200
From: "Carles Gomez Montenegro" <carlesgo@entel.upc.edu>
To: 6lo@ietf.org
Cc: paduffy@cisco.com, roll@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/SVlKy1exuMPAOp0OTciM2ZVSnEM>
Subject: [Roll] Early Allocation of IANA Code Points (Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02)
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Dear 6Lo WG,

(CC'ing the ROLL WG.)

In continuation to our previous message:

The authors of draft-thubert-6lo-multicast-registration-02 have requested 
early allocation of IANA code points for the following (sub)registries:  
RPL Target Option flags, EARO flags, RPL Mode of Operation, and 6LoWPAN
Capability Bits.

The reason for early code point allocation is that this work is planned to
be coordinated with the Wi-SUN Alliance and it is needed for
implementation purposes.

Should you have any objections to early allocation of such IANA code
points, please let us know.

Thanks,

Shwetha and Carles


> Dear 6Lo WG,
>
> Considering the need and the urgency for the functionality defined in
> draft-thubert-6lo-multicast-registration-02, along with the interest from
> the Wi-SUN Alliance, this message starts a 10-day call for WG adoption for
> draft-thubert-6lo-multicast-registration-02.
>
> (Link below:
> https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registration)
>
> The call will end on the 21st of October, EOB.
>
> Please state whether you are in favor of adopting this document.
>
> Also, any comments you may have, and/or expressions of interest to review
> the document, will be very much appreciated.
>
> Thanks,
>
> Shwetha and Carles


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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Wed, 13 Oct 2021 01:33:37 +0300
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To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: Alvaro Retana <aretana.ietf@gmail.com>,  "Pascal Thubert (pthubert)" <pthubert@cisco.com>,  "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>,  Routing Over Low power and Lossy networks <roll@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/981Wp_gRqywQkjd5ZpFd2Jb-Y_I>
Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Hi,

On Sun, Oct 10, 2021 at 7:30 PM Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> Alvaro Retana <aretana.ietf@gmail.com> wrote:
>     > If we=E2=80=99re moving forward with using MOP 4, then this is what=
 we would
> need
>     > (at least):
>
>     > - IANA Considerations: request to add aodv-rpl as a reference in th=
e
>     > registry.
>
>     > - A new section that talks about how the reuse is ok, and any
> consequences
>     > of overlapping.  A requirement to not use both variations in the sa=
me
>     > network would be fine too.
>
> Is there an upgrade consideration if we re-use?
> We could also allocate a new MOP,


The current MOP in the doc is 5, I understand this would be the new MOP,
right?


> and deprecate MOP 4, and reuse it later on.
>

I think if we deprecate MOP4, it makes sense to me to assign it to
AODV-RPL, right?


>
> My belief is that there are few deployments of P2P RPL today, and that a
> forklift upgrade of them is acceptable.
>

RIOT OS has implemented P2P RPL
https://api.riot-os.org/group__net__gnrc__rpl__p2p.html
But yes, I have not found further deployments.

 Thanks,
Ines.

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

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<div dir=3D"ltr"><div dir=3D"ltr">Hi,<div><br></div></div><div class=3D"gma=
il_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Oct 10, 2021 at 7:3=
0 PM Michael Richardson &lt;<a href=3D"mailto:mcr%2Bietf@sandelman.ca">mcr+=
ietf@sandelman.ca</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);p=
adding-left:1ex"><br>
Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com" target=3D"_blan=
k">aretana.ietf@gmail.com</a>&gt; wrote:<br>
=C2=A0 =C2=A0 &gt; If we=E2=80=99re moving forward with using MOP 4, then t=
his is what we would need<br>
=C2=A0 =C2=A0 &gt; (at least):<br>
<br>
=C2=A0 =C2=A0 &gt; - IANA Considerations: request to add aodv-rpl as a refe=
rence in the<br>
=C2=A0 =C2=A0 &gt; registry.<br>
<br>
=C2=A0 =C2=A0 &gt; - A new section that talks about how the reuse is ok, an=
d any consequences<br>
=C2=A0 =C2=A0 &gt; of overlapping.=C2=A0 A requirement to not use both vari=
ations in the same<br>
=C2=A0 =C2=A0 &gt; network would be fine too.<br>
<br>
Is there an upgrade consideration if we re-use?<br>
We could also allocate a new MOP,</blockquote><div><br></div><div>The curre=
nt MOP in the doc is 5, I understand this would be the new MOP,=C2=A0 right=
?</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> =
and deprecate MOP 4, and reuse it later on.<br></blockquote><div><br></div>=
<div>I think if we deprecate MOP4, it makes sense to me to assign it to AOD=
V-RPL, right?</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">
<br>
My belief is that there are few deployments of P2P RPL today, and that a<br=
>
forklift upgrade of them is acceptable.<br></blockquote><div><br></div><div=
>RIOT OS has implemented P2P RPL=C2=A0<a href=3D"https://api.riot-os.org/gr=
oup__net__gnrc__rpl__p2p.html">https://api.riot-os.org/group__net__gnrc__rp=
l__p2p.html</a></div><div>But yes, I have not found further deployments.=C2=
=A0</div><div><br></div><div>=C2=A0Thanks,</div><div>Ines.=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>
--<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>
<br>
<br>
<br>
</blockquote></div></div>

--000000000000e8cd4b05ce2f717c--


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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Wed, 13 Oct 2021 01:58:19 +0300
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
Cc: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, Alvaro Retana <aretana.ietf@gmail.com>,  Charlie Perkins <charles.perkins@earthlink.net>
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Subject: [Roll] Last Call on MOP for AODV-RPL
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Dear all,

Please let us know by 16th Oct if you have some objection to assign MOP 4
to AODV-RPL.

So far, we have these options (you can find them in the thread [1]):

*Option 1: Keep the current MOP for AODV-RPL =3D> MOP =3D 5

* Option 2: Assign MOP 4 (P2P RPL) to AODV-RPL:
    -Action Points with this:
        - IANA Considerations: request to add aodv-rpl as a reference in
the registry.
        - A new section that talks about how the reuse is ok, and any
consequences of overlapping.  A requirement to not use both variations
(P2P-RPL and AODV-RPL) in the same network would be fine too.
       - Are you aware of some deployment of P2P-RPL?

*Option 3: Allocate a new MOP, deprecate MOP 4 and reuse it later on.

Please let us know your thoughts on this,

Thanks,

Ines and Dominique.
[1] https://mailarchive.ietf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/

On Wed, Oct 6, 2021 at 1:58 PM Alvaro Retana <aretana.ietf@gmail.com> wrote=
:

> [Added the draft name to the subject to benefit my filters. ;-) ]
>
> Pascal:
>
> Hi!
>
> I asked the same question (about aodv-rpl replacing/obsoleting rfc6997)
> when I did my review [1] =E2=80=94 more than two years ago!  But sadly re=
ceived no
> real reply from the WG =E2=80=94 so we moved ahead with the document as i=
t is now.
> Peter brought the question back in his IoT DIT review [2] earlier this
> year, but again no discussion from the WG.
>
> It is clear to see that aodv-rpl uses some of the technology from rfc6997
> and, as I understand it, a deployment would never include both.  The
> question then is valid and I would love to see more interest this time
> around.
>
> Just FYI =E2=80=94 there would need to be some process behind a move to f=
ormally
> replace rfc6997 (beyond updating the draft).  We can deal with that if we
> need to.
>
> Thanks!
>
> Alvaro.
>
>
> [1]
> https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/
> [2]
> https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFq=
S8930ZYI/
>
>
> On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (
> pthubert=3D40cisco.com@dmarc.ietf.org) wrote:
>
> Dear all,
>
>
>
> RPL AODV is close to completion, congrats to the authors!
>
> Now, there=E2=80=99s the question of the MOP and 2 options, reuse the exp=
erimental
> one for P2P RPL, or take another.
>
>
>
> Right now, the draft takes 5 and P2P has 4 (
> https://www.iana.org/assignments/rpl/rpl.xhtml#mop)
>
>
>
> My observation is that P2P is the experiment that leads to AODV, so AODV
> should deprecate it.
>
>
>
> I have not heard of real deployments, and if that happened, I do not
> expect a mix of devices that would create confusion.
>
> So would that be OK to assign MOP 4 to RPL AODV?
>
>
>
> Note that we only have up to 6 to play with, and the multicast and anycas=
t
> supports are already on the cooking table.
>
>
>
> Keep safe,
>
>
>
> Pascal
>
>
> _______________________________________________
> 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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<div dir=3D"ltr"><div>Dear all,</div><div><br></div><div>Please let us know=
 by 16th Oct if you have some objection to assign MOP 4 to AODV-RPL.=C2=A0<=
/div><div><br></div><div>So far, we have these options (you can find them i=
n the thread [1]):</div><div><br></div><div>*Option 1: Keep the current MOP=
 for AODV-RPL =3D&gt; MOP =3D 5</div><div><br></div><div>* Option 2: Assign=
 MOP 4 (P2P RPL) to AODV-RPL:=C2=A0</div><div>=C2=A0 =C2=A0 -Action Points =
with this:=C2=A0</div><div><span style=3D"font-family:Helvetica,Arial;font-=
size:13px">=C2=A0 =C2=A0 =C2=A0 =C2=A0 - IANA Considerations: request to ad=
d aodv-rpl as a reference in the registry.=C2=A0</span></div><div><span sty=
le=3D"font-size:13px;font-family:Helvetica,Arial">=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 - A new section that talks about how the reuse is ok, and any consequen=
ces of overlapping.=C2=A0 A requirement to not use both variations (P2P-RPL=
 and AODV-RPL) in the same network would be fine too.</span>=C2=A0</div><di=
v>=C2=A0 =C2=A0 =C2=A0 =C2=A0- Are you aware of some deployment of P2P-RPL?=
</div><div><br></div><div>*Option 3: Allocate a new MOP, deprecate MOP 4 an=
d reuse it later on.=C2=A0</div><div><br></div><div>Please let us know your=
=C2=A0thoughts on this,</div><div><br></div><div>Thanks,</div><div><br></di=
v><div>Ines and Dominique.=C2=A0</div><div>[1]=C2=A0<a href=3D"https://mail=
archive.ietf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/">https://mailar=
chive.ietf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/</a></div><br><div=
 class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 6,=
 2021 at 1:58 PM Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com=
">aretana.ietf@gmail.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><div style=3D"font-family:Helvetica,Arial;font=
-size:13px">[Added the draft name to the subject to benefit my filters. ;-)=
 ]</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div=
><div style=3D"font-family:Helvetica,Arial;font-size:13px">Pascal:</div><di=
v style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=
=3D"font-family:Helvetica,Arial;font-size:13px">Hi!</div><div style=3D"font=
-family:Helvetica,Arial;font-size:13px"><br></div><div style=3D"font-family=
:Helvetica,Arial;font-size:13px">I asked the same question (about aodv-rpl =
replacing/obsoleting rfc6997) when I did my review [1] =E2=80=94 more than =
two years ago!=C2=A0 But sadly received no real reply from the WG =E2=80=94=
 so we moved ahead with the document as it is now.=C2=A0 Peter brought the =
question back in his IoT DIT review [2] earlier this year, but again no dis=
cussion from the WG.</div><div style=3D"font-family:Helvetica,Arial;font-si=
ze:13px"><br></div><div style=3D"font-family:Helvetica,Arial;font-size:13px=
">It is clear to see that aodv-rpl uses some of the technology from rfc6997=
 and, as I understand it, a deployment would never include both.=C2=A0 The =
question then is valid and I would love to see more interest this time arou=
nd.</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></di=
v><div style=3D"font-family:Helvetica,Arial;font-size:13px">Just FYI =E2=80=
=94 there would need to be some process behind a move to formally replace r=
fc6997 (beyond updating the draft).=C2=A0 We can deal with that if we need =
to.</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></di=
v><div style=3D"font-family:Helvetica,Arial;font-size:13px">Thanks!</div><d=
iv style=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div styl=
e=3D"font-family:Helvetica,Arial;font-size:13px">Alvaro.</div> <div><br></d=
iv><div><br></div>[1]=C2=A0<a href=3D"https://mailarchive.ietf.org/arch/msg=
/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/" target=3D"_blank">https://mailarchive.i=
etf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/</a>=C2=A0<div>[2]=C2=A0<=
a href=3D"https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4pp=
Y1GKjQFqS8930ZYI/" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/=
iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/</a>=C2=A0<br><p>On October 6, =
2021 at 2:29:30 AM, Pascal Thubert (pthubert) (<a href=3D"mailto:pthubert=
=3D40cisco.com@dmarc.ietf.org" target=3D"_blank">pthubert=3D40cisco.com@dma=
rc.ietf.org</a>) wrote:</p> <blockquote type=3D"cite"><span><div lang=3D"EN=
-US" style=3D"overflow-wrap: break-word;"><div></div><div>






<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Dear all,
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">RPL AODV is close to completion, congrats to the authors!</span></fon=
t></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Now, there=E2=80=99s the question of the MOP and 2 options, reuse the=
 experimental one for P2P RPL, or take another.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Right now, the draft takes 5 and P2P has 4 (<a href=3D"https://www.ia=
na.org/assignments/rpl/rpl.xhtml#mop" target=3D"_blank">https://www.iana.or=
g/assignments/rpl/rpl.xhtml#mop</a></span></font><font face=3D"Arial"><span=
 style=3D"font-family:Arial,sans-serif">)</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">My observation is that P2P is the e=
xperiment that leads to AODV, so AODV should deprecate it.
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">I have not heard of real deployment=
s, and if that happened, I do not expect a mix of devices that would create=
 confusion.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">So would that be OK to assign MOP 4=
 to RPL AODV?</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Note that we only have up to 6 to p=
lay with, and the multicast and anycast supports are already on the cooking=
 table.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Keep safe,</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Pascal<font color=3D"#666666"><span=
 style=3D"color:rgb(102,102,102)"></span></font></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=C2=A0</span></font></p>
</div>


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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Wed, 13 Oct 2021 02:02:09 +0300
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Subject: [Roll] IETF 112 - Call for Presentations
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Dear all,

Please let us know by 22th Oct if you desire to present a topic at the IETF
112. We will have a one hour time-slot. Please indicate in your request:
Topic, Presenter, and required time.

Thank you in advance,

Ines and Dominique

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<div dir=3D"ltr">Dear all,<br><div><br></div><div>Please let us know by 22t=
h Oct if you desire to present a topic at the IETF 112. We will have a one =
hour time-slot. Please indicate in your request: Topic, Presenter, and requ=
ired time.</div><div><br></div><div>Thank you in advance,</div><div><br></d=
iv><div>Ines and Dominique</div></div>

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] Last Call on MOP for AODV-RPL
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Ines Robles <mariainesrobles=3D40googlemail.com@dmarc.ietf.org> wrote:
    > * Option 2: Assign MOP 4 (P2P RPL) to AODV-RPL:
    > -Action Points with this:
    > - IANA Considerations: request to add aodv-rpl as a reference in
    > the registry.
    > - A new section that talks about how the reuse is ok, and any
    > consequences of overlapping.  A requirement to not use both variations
    > (P2P-RPL and AODV-RPL) in the same network would be fine too.
    > - Are you aware of some deployment of P2P-RPL?

Works for me.


=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: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Ines Robles <mariainesrobles@googlemail.com>
CC: Michael Richardson <mcr+ietf@sandelman.ca>, Alvaro Retana <aretana.ietf@gmail.com>, "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>, "Routing Over Low power and Lossy networks" <roll@ietf.org>
Thread-Topic: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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--_000_140E8436D3D04A2496C716C1CDBC6384ciscocom_--


From nobody Fri Oct 15 15:41:18 2021
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Subject: [Roll] roll - Requested session has been scheduled for IETF 112
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Dear Ines Robles,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 


    roll Session 1 (1:00 requested)
    Wednesday, 10 November 2021, Session II 1430-1530
    Room Name: Room 6 size: 506
    ---------------------------------------------


iCalendar: https://datatracker.ietf.org/meeting/112/sessions/roll.ics

Request Information:


---------------------------------------------------------
Working Group Name: Routing Over Low power and Lossy networks
Area Name: Routing Area
Session Requester: Ines Robles


Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 25
Conflicts to Avoid: 

       


People who must be present:
  Alvaro Retana
  Dominique Barthel
  Ines Robles
  Michael Richardson

Resources Requested:

Special Requests:
  
---------------------------------------------------------



From nobody Fri Oct 15 18:09:07 2021
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Subject: [Roll] Constrained Node/Network Cluster @ IETF112: FINAL AGENDA
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Here is my usual eclectic condensed agenda based on the "FINAL" AGENDA
for IETF112.  Remember that further agenda changes can still happen.

COSE no longer is on IOTOPS; MADINAS, ADD, INTAREA, UTA, and OPENPGP
have moved around a bit.  The conspicuous conflict of ASDF/LAKE/RATS
remains.

All times are in UTC.
Note that the first week in November (W44) is the Week of Confusion,
where DST has ended in Europe but not yet in North America.
https://datatracker.ietf.org/meeting/agenda-utc might be handy.

Gr=C3=BC=C3=9Fe, Carsten


(### DST ENDS IN EUROPE ###)

MONDAY, November 1, 2021

1500-1600  Hackathon Kickoff
Rm 1    	GEN	hackathon	Hackathon

WEDNESDAY, November 3, 2021

1330-1500  IETF Plenary - Plenary

FRIDAY, November 5, 2021

1500-1700  Hackathon Closing
Rm 1    	GEN	hackathon	Hackathon

(### DST ENDS IN NORTH AMERICA ###)

MONDAY, November 8, 2021

1200-1400  Session I
Rm 1    	ART	dispatch	Dispatch WG - Joint with ARTAREA
Rm 7    	SEC ***	rats	Remote ATtestation ProcedureS WG
Rm 8    	TSV	masque	Multiplexed Application Substrate over =
QUIC Encryption WG

1430-1530  Session II
Rm 2    	INT ***	6lo	IPv6 over Networks of =
Resource-constrained Nodes WG
Rm 5    	RTG	rift	Routing In Fat Trees WG
Rm 7    	SEC ***	suit	Software Updates for Internet of Things =
WG
Rm 8    	TSV	tsvwg	Transport Area Working Group WG

1600-1800  Session III
Rm 1    	ART ***	core	Constrained RESTful Environments WG
Rm 3    	INT	add	Adaptive DNS Discovery WG

TUESDAY, November 9, 2021

1200-1400  Session I
Rm 2    	ART	webtrans	WebTransport WG
Rm 3    	INT	intarea	Internet Area Working Group WG
Rm 6    	RTG	raw	Reliable and Available Wireless WG
Rm 7    	SEC	secdispatch	Security Dispatch WG

1430-1530  Session II
Rm 1    	ART	sedate	Serialising Extended Data About Times =
and Events WG
Rm 3    	INT ***	lpwan	IPv6 over Low Power Wide-Area Networks =
WG
Rm 4    	IRTF	maprg	Measurement and Analysis for Protocols
Rm 7    	SEC ***	ace	Authentication and Authorization for =
Constrained Environments WG

1600-1800  Session III
Rm 3    	INT	6man	IPv6 Maintenance WG
Rm 4    	IRTF	irtfopen	IRTF Open Meeting
Rm 8    	SEC	tls	Transport Layer Security WG

WEDNESDAY, November 10, 2021

1200-1400  Session I
Rm 2    	ART	jsonpath	JSON Path WG
Rm 3    	INT	madinas	MAC Address Device Identification for =
Network and Application Services WG
Rm 5    	RTG	detnet	Deterministic Networking WG
Rm 7    	SEC	openpgp	Open Specification for Pretty Good =
Privacy WG
Rm 8    	TSV	quic	QUIC WG

1430-1530  Session II
Rm 4    	RTG	babel	Babel routing protocol WG
Rm 6    	RTG ***	roll	Routing Over Low power and Lossy =
networks WG
Rm 7    	SEC ***	cose	CBOR Object Signing and Encryption WG
Rm 8    	TSV	tsvarea	Transport Area Open Meeting

1600-1800  Session III
Rm 1    	ART	wpack	Web Packaging WG
Rm 3    	OPS	anima	Autonomic Networking Integrated Model =
and Approach WG

THURSDAY, November 11, 2021

1200-1400  Session I
Rm 3    	IRTF	cfrg	Crypto Forum
Rm 4    	IRTF	coinrg	Computing in the Network Research Group
Rm 6    	SEC	gnap	Grant Negotiation and Authorization =
Protocol WG

1430-1530  Session II
Rm 1    	ART ***	cbor	Concise Binary Object Representation =
Maintenance and Extensions WG
Rm 3    	INT ***	drip	Drone Remote ID Protocol WG
Rm 4    	IRTF	pearg	Privacy Enhancements and Assessments =
Research Group
Rm 6    	OPS	v6ops	IPv6 Operations WG
Rm 7    	RTG	bier	Bit Indexed Explicit Replication WG
Rm 8    	SEC	acme	Automated Certificate Management =
Environment WG

1600-1800  Session III
Rm 1    	IRTF	panrg	Path Aware Networking RG
Rm 6    	SEC	saag	Security Area Open Meeting

FRIDAY, November 12, 2021

1200-1400  Session I
Rm 2    	ART	httpapi	Building Blocks for HTTP APIs WG
Rm 4    	OPS	v6ops	IPv6 Operations WG - Joint with 6MAN
Rm 6    	SEC	dance	DANE Authentication for Network Clients =
Everywhere WG
Rm 7    	SEC ***	teep	Trusted Execution Environment =
Provisioning WG

1430-1530  Session II
Rm 1    	ART ***	asdf	A Semantic Definition Format for Data =
and Interactions of Things WG
Rm 5    	RTG	rtgarea	Routing Area Open Meeting
Rm 6    	SEC ***	lake	Lightweight Authenticated Key Exchange =
WG
Rm 7    	SEC ***	rats	Remote ATtestation ProcedureS WG
Rm 8    	TSV	rmcat	RTP Media Congestion Avoidance =
Techniques WG

1600-1700  Session III
Rm 2    	ART	uta	Using TLS in Applications WG
Rm 3    	INT	dnssd	Extensions for Scalable DNS Service =
Discovery WG
Rm 4    	OPS ***	iotops	IOT Operations WG
Rm 7    	TSV	tsvwg	Transport Area Working Group WG
mediaman


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "fanwg@wi-sun.org" <fanwg@wi-sun.org>, "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
Thread-Topic: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02
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Subject: [Roll] FW: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02
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X-List-Received-Date: Tue, 19 Oct 2021 07:12:16 -0000

Dear all:

As an author I support the adoption of the document by the 6lo WG. To 6lo, =
it saves the need for MLD on the constrained devices, and the related multi=
cast no less expensive than the one related to ND procedures. To ROLL bring=
s multicast to the non-storing mode using ingress replication at the Root. =
That was a long awaited feature since non storing is arch dominant in IOT n=
etworks.

The WGLC will end soon. Please chime in.

Keep safe;

Pascal

-----Original Message-----
From: 6lo <6lo-bounces@ietf.org> On Behalf Of Carles Gomez Montenegro
Sent: lundi 18 octobre 2021 16:20
To: 6lo@ietf.org
Cc: Paul Duffy (paduffy) <paduffy@cisco.com>
Subject: Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-regist=
ration-02

Dear all,

This is a gentle reminder that the call for adoption below is currently ope=
n (note: the call will end this Thursday, EOB).

Please state on the mailing list whether you are in favor of adopting the d=
ocument.

Thanks,

Shwetha and Carles


> Dear 6Lo WG,
>
> Considering the need and the urgency for the functionality defined in=20
> draft-thubert-6lo-multicast-registration-02, along with the interest=20
> from the Wi-SUN Alliance, this message starts a 10-day call for WG=20
> adoption for draft-thubert-6lo-multicast-registration-02.
>
> (Link below:
> https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registrat
> ion)
>
> The call will end on the 21st of October, EOB.
>
> Please state whether you are in favor of adopting this document.
>
> Also, any comments you may have, and/or expressions of interest to=20
> review the document, will be very much appreciated.
>
> Thanks,
>
> Shwetha and Carles
>
>
> _______________________________________________
> 6lo mailing list
> 6lo@ietf.org
> https://www.ietf.org/mailman/listinfo/6lo
>


_______________________________________________
6lo mailing list
6lo@ietf.org
https://www.ietf.org/mailman/listinfo/6lo


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From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Tue, 19 Oct 2021 21:54:21 +0200
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
Cc: Charlie Perkins <charles.perkins@earthlink.net>
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Subject: Re: [Roll] Last Call on MOP for AODV-RPL
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Hi Ines,

I think it is better to assign AODV_RPL using 5. Not sure why just because
not much used  P2P_RPL we change to another protocol, is this option taken
often in IETF WGs.

Best Regards
AB

On Wed, Oct 13, 2021 at 12:59 AM Ines Robles <mariainesrobles=3D
40googlemail.com@dmarc.ietf.org> wrote:

> Dear all,
>
> Please let us know by 16th Oct if you have some objection to assign MOP 4
> to AODV-RPL.
>
> So far, we have these options (you can find them in the thread [1]):
>
> *Option 1: Keep the current MOP for AODV-RPL =3D> MOP =3D 5
>
> * Option 2: Assign MOP 4 (P2P RPL) to AODV-RPL:
>     -Action Points with this:
>         - IANA Considerations: request to add aodv-rpl as a reference in
> the registry.
>         - A new section that talks about how the reuse is ok, and any
> consequences of overlapping.  A requirement to not use both variations
> (P2P-RPL and AODV-RPL) in the same network would be fine too.
>        - Are you aware of some deployment of P2P-RPL?
>
> *Option 3: Allocate a new MOP, deprecate MOP 4 and reuse it later on.
>
> Please let us know your thoughts on this,
>
> Thanks,
>
> Ines and Dominique.
> [1]
> https://mailarchive.ietf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/
>
> On Wed, Oct 6, 2021 at 1:58 PM Alvaro Retana <aretana.ietf@gmail.com>
> wrote:
>
>> [Added the draft name to the subject to benefit my filters. ;-) ]
>>
>> Pascal:
>>
>> Hi!
>>
>> I asked the same question (about aodv-rpl replacing/obsoleting rfc6997)
>> when I did my review [1] =E2=80=94 more than two years ago!  But sadly r=
eceived no
>> real reply from the WG =E2=80=94 so we moved ahead with the document as =
it is now.
>> Peter brought the question back in his IoT DIT review [2] earlier this
>> year, but again no discussion from the WG.
>>
>> It is clear to see that aodv-rpl uses some of the technology from rfc699=
7
>> and, as I understand it, a deployment would never include both.  The
>> question then is valid and I would love to see more interest this time
>> around.
>>
>> Just FYI =E2=80=94 there would need to be some process behind a move to =
formally
>> replace rfc6997 (beyond updating the draft).  We can deal with that if w=
e
>> need to.
>>
>> Thanks!
>>
>> Alvaro.
>>
>>
>> [1]
>> https://mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/
>> [2]
>> https://mailarchive.ietf.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQF=
qS8930ZYI/
>>
>>
>> On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (
>> pthubert=3D40cisco.com@dmarc.ietf.org) wrote:
>>
>> Dear all,
>>
>>
>>
>> RPL AODV is close to completion, congrats to the authors!
>>
>> Now, there=E2=80=99s the question of the MOP and 2 options, reuse the
>> experimental one for P2P RPL, or take another.
>>
>>
>>
>> Right now, the draft takes 5 and P2P has 4 (
>> https://www.iana.org/assignments/rpl/rpl.xhtml#mop)
>>
>>
>>
>> My observation is that P2P is the experiment that leads to AODV, so AODV
>> should deprecate it.
>>
>>
>>
>> I have not heard of real deployments, and if that happened, I do not
>> expect a mix of devices that would create confusion.
>>
>> So would that be OK to assign MOP 4 to RPL AODV?
>>
>>
>>
>> Note that we only have up to 6 to play with, and the multicast and
>> anycast supports are already on the cooking table.
>>
>>
>>
>> Keep safe,
>>
>>
>>
>> Pascal
>>
>>
>> _______________________________________________
>> 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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<div dir=3D"ltr">Hi Ines,<div><br></div><div>I think it is better to assign=
 AODV_RPL using 5. Not sure why just because not much used=C2=A0 P2P_RPL we=
 change to another protocol, is this option taken often in IETF WGs.</div><=
div><br></div><div>Best Regards</div><div>AB</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 13, 2021 at 1=
2:59 AM Ines Robles &lt;mariainesrobles=3D<a href=3D"mailto:40googlemail.co=
m@dmarc.ietf.org">40googlemail.com@dmarc.ietf.org</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div>Dear=
 all,</div><div><br></div><div>Please let us know by 16th Oct if you have s=
ome objection to assign MOP 4 to AODV-RPL.=C2=A0</div><div><br></div><div>S=
o far, we have these options (you can find them in the thread [1]):</div><d=
iv><br></div><div>*Option 1: Keep the current MOP for AODV-RPL =3D&gt; MOP =
=3D 5</div><div><br></div><div>* Option 2: Assign MOP 4 (P2P RPL) to AODV-R=
PL:=C2=A0</div><div>=C2=A0 =C2=A0 -Action Points with this:=C2=A0</div><div=
><span style=3D"font-family:Helvetica,Arial;font-size:13px">=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 - IANA Considerations: request to add aodv-rpl as a reference=
 in the registry.=C2=A0</span></div><div><span style=3D"font-size:13px;font=
-family:Helvetica,Arial">=C2=A0 =C2=A0 =C2=A0 =C2=A0 - A new section that t=
alks about how the reuse is ok, and any consequences of overlapping.=C2=A0 =
A requirement to not use both variations (P2P-RPL and AODV-RPL) in the same=
 network would be fine too.</span>=C2=A0</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0- Are you aware of some deployment of P2P-RPL?</div><div><br></div><div>=
*Option 3: Allocate a new MOP, deprecate MOP 4 and reuse it later on.=C2=A0=
</div><div><br></div><div>Please let us know your=C2=A0thoughts on this,</d=
iv><div><br></div><div>Thanks,</div><div><br></div><div>Ines and Dominique.=
=C2=A0</div><div>[1]=C2=A0<a href=3D"https://mailarchive.ietf.org/arch/msg/=
roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/" target=3D"_blank">https://mailarchive.ie=
tf.org/arch/msg/roll/HaqbaOhGzM5hbHEL7rpgEgskqUY/</a></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 6, 2021 =
at 1:58 PM Alvaro Retana &lt;<a href=3D"mailto:aretana.ietf@gmail.com" targ=
et=3D"_blank">aretana.ietf@gmail.com</a>&gt; wrote:<br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex"><div><div style=3D"font-family:Helvetic=
a,Arial;font-size:13px">[Added the draft name to the subject to benefit my =
filters. ;-) ]</div><div style=3D"font-family:Helvetica,Arial;font-size:13p=
x"><br></div><div style=3D"font-family:Helvetica,Arial;font-size:13px">Pasc=
al:</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br></di=
v><div style=3D"font-family:Helvetica,Arial;font-size:13px">Hi!</div><div s=
tyle=3D"font-family:Helvetica,Arial;font-size:13px"><br></div><div style=3D=
"font-family:Helvetica,Arial;font-size:13px">I asked the same question (abo=
ut aodv-rpl replacing/obsoleting rfc6997) when I did my review [1] =E2=80=
=94 more than two years ago!=C2=A0 But sadly received no real reply from th=
e WG =E2=80=94 so we moved ahead with the document as it is now.=C2=A0 Pete=
r brought the question back in his IoT DIT review [2] earlier this year, bu=
t again no discussion from the WG.</div><div style=3D"font-family:Helvetica=
,Arial;font-size:13px"><br></div><div style=3D"font-family:Helvetica,Arial;=
font-size:13px">It is clear to see that aodv-rpl uses some of the technolog=
y from rfc6997 and, as I understand it, a deployment would never include bo=
th.=C2=A0 The question then is valid and I would love to see more interest =
this time around.</div><div style=3D"font-family:Helvetica,Arial;font-size:=
13px"><br></div><div style=3D"font-family:Helvetica,Arial;font-size:13px">J=
ust FYI =E2=80=94 there would need to be some process behind a move to form=
ally replace rfc6997 (beyond updating the draft).=C2=A0 We can deal with th=
at if we need to.</div><div style=3D"font-family:Helvetica,Arial;font-size:=
13px"><br></div><div style=3D"font-family:Helvetica,Arial;font-size:13px">T=
hanks!</div><div style=3D"font-family:Helvetica,Arial;font-size:13px"><br><=
/div><div style=3D"font-family:Helvetica,Arial;font-size:13px">Alvaro.</div=
> <div><br></div><div><br></div>[1]=C2=A0<a href=3D"https://mailarchive.iet=
f.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/" target=3D"_blank">https:/=
/mailarchive.ietf.org/arch/msg/roll/XXaPFyhqiUS_bpYSJT45UaLyeec/</a>=C2=A0<=
div>[2]=C2=A0<a href=3D"https://mailarchive.ietf.org/arch/msg/iot-directora=
te/f2GUlTDX4ppY1GKjQFqS8930ZYI/" target=3D"_blank">https://mailarchive.ietf=
.org/arch/msg/iot-directorate/f2GUlTDX4ppY1GKjQFqS8930ZYI/</a>=C2=A0<br><p>=
On October 6, 2021 at 2:29:30 AM, Pascal Thubert (pthubert) (<a href=3D"mai=
lto:pthubert=3D40cisco.com@dmarc.ietf.org" target=3D"_blank">pthubert=3D40c=
isco.com@dmarc.ietf.org</a>) wrote:</p> <blockquote type=3D"cite"><span><di=
v lang=3D"EN-US"><div></div><div>






<div>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Dear all,
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">RPL AODV is close to completion, congrats to the authors!</span></fon=
t></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Now, there=E2=80=99s the question of the MOP and 2 options, reuse the=
 experimental one for P2P RPL, or take another.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#666666" face=3D"Arial"><s=
pan style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(102,102,=
102)">Right now, the draft takes 5 and P2P has 4 (<a href=3D"https://www.ia=
na.org/assignments/rpl/rpl.xhtml#mop" target=3D"_blank">https://www.iana.or=
g/assignments/rpl/rpl.xhtml#mop</a></span></font><font face=3D"Arial"><span=
 style=3D"font-family:Arial,sans-serif">)</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">My observation is that P2P is the e=
xperiment that leads to AODV, so AODV should deprecate it.
</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">I have not heard of real deployment=
s, and if that happened, I do not expect a mix of devices that would create=
 confusion.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">So would that be OK to assign MOP 4=
 to RPL AODV?</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Note that we only have up to 6 to p=
lay with, and the multicast and anycast supports are already on the cooking=
 table.</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Keep safe,</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">=C2=A0</span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:11pt;font-family:Arial,sans-serif">Pascal<font color=3D"#666666"><span=
 style=3D"color:rgb(102,102,102)"></span></font></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11pt">=C2=A0</span></font></p>
</div>


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From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Tue, 19 Oct 2021 22:02:47 +0200
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>,  "draft-ietf-roll-aodv-rpl.all@ietf.org" <draft-ietf-roll-aodv-rpl.all@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/jpMKQheAYoOoKMH5qD8eUxs0gFk>
Subject: Re: [Roll] Which MOP for RPL AODV? (draft-ietf-roll-aodv-rpl)
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On Sun, Oct 10, 2021 at 7:44 PM Pascal Thubert (pthubert) <pthubert=
40cisco.com@dmarc.ietf.org> wrote:

>
> Hello Michael
>
> As long as no one forms a network that has both that should not be a
> problem, should it?
>

So if the WG goes for this option of using 4 for AODV, then yes there is no
options for users to have both in one network.
Currently we have 5 available can be used, with more options for LLNs
users, so why not give more opportunities until future decisions?

AB

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Sun, Oct 10, 2021 at 7:44 PM Pasca=
l Thubert (pthubert) &lt;pthubert=3D<a href=3D"mailto:40cisco.com@dmarc.iet=
f.org">40cisco.com@dmarc.ietf.org</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">



<div dir=3D"auto">
<br>
Hello Michael=C2=A0
<div><br>
</div>
<div>As long as no one forms a network that has both that should not be a p=
roblem, should it?<br></div></div></blockquote><div><br></div><div>So if th=
e WG goes for this option of using 4 for AODV, then yes there is no options=
 for users to have both in one network.</div><div>Currently we have 5 avail=
able can be used, with more options for LLNs users, so why not give more op=
portunities until future decisions?</div><div><br></div><div>AB</div><div><=
br></div><div>=C2=A0</div></div></div>

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To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] Last Call on MOP for AODV-RPL
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Abdussalam Baryun <abdussalambaryun@gmail.com> wrote:
    > I think it is better to assign AODV_RPL using 5. Not sure why just
    > because not much used P2P_RPL we change to another protocol, is this
    > option taken often in IETF WGs.

Until we do RPL v2 with MOPEX, we'll have only 1 MOP value left (6).
AODV_RPL replaces/upgrades P2P_RPL.
We think that P2P_RPL isn't widely deployed.


=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: "Huimin She (hushe)" <hushe@cisco.com>
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "fanwg@wi-sun.org" <fanwg@wi-sun.org>, "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
Thread-Topic: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02
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Date: Wed, 20 Oct 2021 01:53:45 +0000
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Subject: Re: [Roll] [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02
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Dear all,

I support the adoption of the document by the 6lo WG. It provides a feasibl=
e way for multicast.

Best regards,
Huimin

From: fanwg <fanwg-bounces@wi-sun.org> on behalf of Pascal Thubert (pthuber=
t) <pthubert@cisco.com>
Date: Tuesday, October 19, 2021 at 15:12
To: fanwg@wi-sun.org <fanwg@wi-sun.org>, 6lo@ietf.org <6lo@ietf.org>, ROLL =
WG (roll@ietf.org) <roll@ietf.org>
Subject: [wi-sun fanwg] FW: [6lo] Call for WG adoption: draft-thubert-6lo-m=
ulticast-registration-02
Dear all:

As an author I support the adoption of the document by the 6lo WG. To 6lo, =
it saves the need for MLD on the constrained devices, and the related multi=
cast no less expensive than the one related to ND procedures. To ROLL bring=
s multicast to the non-storing mode using ingress replication at the Root. =
That was a long awaited feature since non storing is arch dominant in IOT n=
etworks.

The WGLC will end soon. Please chime in.

Keep safe;

Pascal

-----Original Message-----
From: 6lo <6lo-bounces@ietf.org> On Behalf Of Carles Gomez Montenegro
Sent: lundi 18 octobre 2021 16:20
To: 6lo@ietf.org
Cc: Paul Duffy (paduffy) <paduffy@cisco.com>
Subject: Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-regist=
ration-02

Dear all,

This is a gentle reminder that the call for adoption below is currently ope=
n (note: the call will end this Thursday, EOB).

Please state on the mailing list whether you are in favor of adopting the d=
ocument.

Thanks,

Shwetha and Carles


> Dear 6Lo WG,
>
> Considering the need and the urgency for the functionality defined in
> draft-thubert-6lo-multicast-registration-02, along with the interest
> from the Wi-SUN Alliance, this message starts a 10-day call for WG
> adoption for draft-thubert-6lo-multicast-registration-02.
>
> (Link below:
> https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registrat
> ion)
>
> The call will end on the 21st of October, EOB.
>
> Please state whether you are in favor of adopting this document.
>
> Also, any comments you may have, and/or expressions of interest to
> review the document, will be very much appreciated.
>
> Thanks,
>
> Shwetha and Carles
>
>
> _______________________________________________
> 6lo mailing list
> 6lo@ietf.org
> https://www.ietf.org/mailman/listinfo/6lo
>


_______________________________________________
6lo mailing list
6lo@ietf.org
https://www.ietf.org/mailman/listinfo/6lo

___________________________________
Copyright (C) 2021 Wi-SUN Alliance.
The contents of this email are confidential and may not be disclosed to non=
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all,<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">I support the adoption of the document by the 6lo WG=
<span lang=3D"EN-US">. It provides a feasible way for multicast.</span><spa=
n lang=3D"EN-US"><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">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Huimin<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">fanwg &lt;fanwg-bou=
nces@wi-sun.org&gt; on behalf of Pascal Thubert (pthubert) &lt;pthubert@cis=
co.com&gt;<br>
<b>Date: </b>Tuesday, October 19, 2021 at 15:12<br>
<b>To: </b>fanwg@wi-sun.org &lt;fanwg@wi-sun.org&gt;, 6lo@ietf.org &lt;6lo@=
ietf.org&gt;, ROLL WG (roll@ietf.org) &lt;roll@ietf.org&gt;<br>
<b>Subject: </b>[wi-sun fanwg] FW: [6lo] Call for WG adoption: draft-thuber=
t-6lo-multicast-registration-02<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">Dear all:<br>
<br>
As an author I support the adoption of the document by the 6lo WG. To 6lo, =
it saves the need for MLD on the constrained devices, and the related multi=
cast no less expensive than the one related to ND procedures. To ROLL bring=
s multicast to the non-storing mode
 using ingress replication at the Root. That was a long awaited feature sin=
ce non storing is arch dominant in IOT networks.<br>
<br>
The WGLC will end soon. Please chime in.<br>
<br>
Keep safe;<br>
<br>
Pascal<br>
<br>
-----Original Message-----<br>
From: 6lo &lt;6lo-bounces@ietf.org&gt; On Behalf Of Carles Gomez Montenegro=
<br>
Sent: lundi 18 octobre 2021 16:20<br>
To: 6lo@ietf.org<br>
Cc: Paul Duffy (paduffy) &lt;paduffy@cisco.com&gt;<br>
Subject: Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-regist=
ration-02<br>
<br>
Dear all,<br>
<br>
This is a gentle reminder that the call for adoption below is currently ope=
n (note: the call will end this Thursday, EOB).<br>
<br>
Please state on the mailing list whether you are in favor of adopting the d=
ocument.<br>
<br>
Thanks,<br>
<br>
Shwetha and Carles<br>
<br>
<br>
&gt; Dear 6Lo WG,<br>
&gt;<br>
&gt; Considering the need and the urgency for the functionality defined in =
<br>
&gt; draft-thubert-6lo-multicast-registration-02, along with the interest <=
br>
&gt; from the Wi-SUN Alliance, this message starts a 10-day call for WG <br=
>
&gt; adoption for draft-thubert-6lo-multicast-registration-02.<br>
&gt;<br>
&gt; (Link below:<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-thubert-6lo-multicas=
t-registrat">
https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registrat</a><=
br>
&gt; ion)<br>
&gt;<br>
&gt; The call will end on the 21st of October, EOB.<br>
&gt;<br>
&gt; Please state whether you are in favor of adopting this document.<br>
&gt;<br>
&gt; Also, any comments you may have, and/or expressions of interest to <br=
>
&gt; review the document, will be very much appreciated.<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; Shwetha and Carles<br>
&gt;<br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; 6lo mailing list<br>
&gt; 6lo@ietf.org<br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/6lo">https://www.ietf=
.org/mailman/listinfo/6lo</a><br>
&gt;<br>
<br>
<br>
_______________________________________________<br>
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6lo@ietf.org<br>
<a href=3D"https://www.ietf.org/mailman/listinfo/6lo">https://www.ietf.org/=
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<br>
___________________________________<br>
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To: "fanwg@wi-sun.org" <fanwg@wi-sun.org>, "6lo@ietf.org" <6lo@ietf.org>, "ROLL WG (roll@ietf.org)" <roll@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/roll/fjHQmlieb3PfQOZsQOV05YwQUQI>
Subject: Re: [Roll] [6lo] Call for WG adoption: draft-thubert-6lo-multicast-registration-02
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--_000_OSZPR01MB7844E20CD635ED4CA599A88D83BE9OSZPR01MB7844jpnp_
Content-Type: text/plain; charset="us-ascii"
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Hi all,

The document "draft-thubert-6lo-multicast-registration-02" addresses actual=
 needs for lower power device operation in multicast use cases, especially =
the updates to RFC8505 described in section 6 will enable efficient multica=
st/anycast address registration for these types of devices. Hence, I do sup=
port the WG adoption of the draft.

Best regards,

Klaus

From: fanwg <fanwg-bounces@wi-sun.org> On Behalf Of Huimin She (hushe)
Sent: Mittwoch, 20. Oktober 2021 03:54
To: Pascal Thubert (pthubert) <pthubert@cisco.com>; fanwg@wi-sun.org; 6lo@i=
etf.org; ROLL WG (roll@ietf.org) <roll@ietf.org>
Subject: Re: [wi-sun fanwg] [6lo] Call for WG adoption: draft-thubert-6lo-m=
ulticast-registration-02

Dear all,

I support the adoption of the document by the 6lo WG. It provides a feasibl=
e way for multicast.

Best regards,
Huimin

From: fanwg <fanwg-bounces@wi-sun.org<mailto:fanwg-bounces@wi-sun.org>> on =
behalf of Pascal Thubert (pthubert) <pthubert@cisco.com<mailto:pthubert@cis=
co.com>>
Date: Tuesday, October 19, 2021 at 15:12
To: fanwg@wi-sun.org<mailto:fanwg@wi-sun.org> <fanwg@wi-sun.org<mailto:fanw=
g@wi-sun.org>>, 6lo@ietf.org<mailto:6lo@ietf.org> <6lo@ietf.org<mailto:6lo@=
ietf.org>>, ROLL WG (roll@ietf.org<mailto:roll@ietf.org>) <roll@ietf.org<ma=
ilto:roll@ietf.org>>
Subject: [wi-sun fanwg] FW: [6lo] Call for WG adoption: draft-thubert-6lo-m=
ulticast-registration-02
Dear all:

As an author I support the adoption of the document by the 6lo WG. To 6lo, =
it saves the need for MLD on the constrained devices, and the related multi=
cast no less expensive than the one related to ND procedures. To ROLL bring=
s multicast to the non-storing mode using ingress replication at the Root. =
That was a long awaited feature since non storing is arch dominant in IOT n=
etworks.

The WGLC will end soon. Please chime in.

Keep safe;

Pascal

-----Original Message-----
From: 6lo <6lo-bounces@ietf.org<mailto:6lo-bounces@ietf.org>> On Behalf Of =
Carles Gomez Montenegro
Sent: lundi 18 octobre 2021 16:20
To: 6lo@ietf.org<mailto:6lo@ietf.org>
Cc: Paul Duffy (paduffy) <paduffy@cisco.com<mailto:paduffy@cisco.com>>
Subject: Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-regist=
ration-02

Dear all,

This is a gentle reminder that the call for adoption below is currently ope=
n (note: the call will end this Thursday, EOB).

Please state on the mailing list whether you are in favor of adopting the d=
ocument.

Thanks,

Shwetha and Carles


> Dear 6Lo WG,
>
> Considering the need and the urgency for the functionality defined in
> draft-thubert-6lo-multicast-registration-02, along with the interest
> from the Wi-SUN Alliance, this message starts a 10-day call for WG
> adoption for draft-thubert-6lo-multicast-registration-02.
>
> (Link below:
> https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registrat<ht=
tps://jpn01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatrack=
er.ietf.org%2Fdoc%2Fdraft-thubert-6lo-multicast-registrat&data=3D04%7C01%7C=
klaus.hueske%40renesas.com%7C943f04d7e534476d6b0408d9936c8972%7C53d82571da1=
947e49cb4625a166a4a2a%7C0%7C1%7C637702916655484980%7CUnknown%7CTWFpbGZsb3d8=
eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&s=
data=3DrWwvFGz2BNKX1m8d6jl2M3wQPluqMi2SE72r5LFg%2B9E%3D&reserved=3D0>
> ion)
>
> The call will end on the 21st of October, EOB.
>
> Please state whether you are in favor of adopting this document.
>
> Also, any comments you may have, and/or expressions of interest to
> review the document, will be very much appreciated.
>
> Thanks,
>
> Shwetha and Carles
>
>
> _______________________________________________
> 6lo mailing list
> 6lo@ietf.org<mailto:6lo@ietf.org>
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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">The document &#8220;draft-thubert-6lo-multicast-regi=
stration-02&#8221; addresses actual needs for lower power device operation =
in multicast use cases, especially the updates to RFC8505 described in sect=
ion 6 will enable efficient multicast/anycast
 address registration for these types of devices. Hence, I do support the W=
G adoption of the draft.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Klaus<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b>From:</b> fanwg &lt;fanwg-bounces@wi-sun.org&gt; =
<b>On Behalf Of
</b>Huimin She (hushe)<br>
<b>Sent:</b> Mittwoch, 20. Oktober 2021 03:54<br>
<b>To:</b> Pascal Thubert (pthubert) &lt;pthubert@cisco.com&gt;; fanwg@wi-s=
un.org; 6lo@ietf.org; ROLL WG (roll@ietf.org) &lt;roll@ietf.org&gt;<br>
<b>Subject:</b> Re: [wi-sun fanwg] [6lo] Call for WG adoption: draft-thuber=
t-6lo-multicast-registration-02<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear all,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I support the adoption of the document by the 6lo WG=
. It provides a feasible way for multicast.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Huimin<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:12.0pt;color:black">From:
</span></b><span style=3D"font-size:12.0pt;color:black">fanwg &lt;<a href=
=3D"mailto:fanwg-bounces@wi-sun.org">fanwg-bounces@wi-sun.org</a>&gt; on be=
half of Pascal Thubert (pthubert) &lt;<a href=3D"mailto:pthubert@cisco.com"=
>pthubert@cisco.com</a>&gt;<br>
<b>Date: </b>Tuesday, October 19, 2021 at 15:12<br>
<b>To: </b><a href=3D"mailto:fanwg@wi-sun.org">fanwg@wi-sun.org</a> &lt;<a =
href=3D"mailto:fanwg@wi-sun.org">fanwg@wi-sun.org</a>&gt;,
<a href=3D"mailto:6lo@ietf.org">6lo@ietf.org</a> &lt;<a href=3D"mailto:6lo@=
ietf.org">6lo@ietf.org</a>&gt;, ROLL WG (<a href=3D"mailto:roll@ietf.org">r=
oll@ietf.org</a>) &lt;<a href=3D"mailto:roll@ietf.org">roll@ietf.org</a>&gt=
;<br>
<b>Subject: </b>[wi-sun fanwg] FW: [6lo] Call for WG adoption: draft-thuber=
t-6lo-multicast-registration-02<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">Dear all:<br>
<br>
As an author I support the adoption of the document by the 6lo WG. To 6lo, =
it saves the need for MLD on the constrained devices, and the related multi=
cast no less expensive than the one related to ND procedures. To ROLL bring=
s multicast to the non-storing mode
 using ingress replication at the Root. That was a long awaited feature sin=
ce non storing is arch dominant in IOT networks.<br>
<br>
The WGLC will end soon. Please chime in.<br>
<br>
Keep safe;<br>
<br>
Pascal<br>
<br>
-----Original Message-----<br>
From: 6lo &lt;<a href=3D"mailto:6lo-bounces@ietf.org">6lo-bounces@ietf.org<=
/a>&gt; On Behalf Of Carles Gomez Montenegro<br>
Sent: lundi 18 octobre 2021 16:20<br>
To: <a href=3D"mailto:6lo@ietf.org">6lo@ietf.org</a><br>
Cc: Paul Duffy (paduffy) &lt;<a href=3D"mailto:paduffy@cisco.com">paduffy@c=
isco.com</a>&gt;<br>
Subject: Re: [6lo] Call for WG adoption: draft-thubert-6lo-multicast-regist=
ration-02<br>
<br>
Dear all,<br>
<br>
This is a gentle reminder that the call for adoption below is currently ope=
n (note: the call will end this Thursday, EOB).<br>
<br>
Please state on the mailing list whether you are in favor of adopting the d=
ocument.<br>
<br>
Thanks,<br>
<br>
Shwetha and Carles<br>
<br>
<br>
&gt; Dear 6Lo WG,<br>
&gt;<br>
&gt; Considering the need and the urgency for the functionality defined in =
<br>
&gt; draft-thubert-6lo-multicast-registration-02, along with the interest <=
br>
&gt; from the Wi-SUN Alliance, this message starts a 10-day call for WG <br=
>
&gt; adoption for draft-thubert-6lo-multicast-registration-02.<br>
&gt;<br>
&gt; (Link below:<br>
&gt; <a href=3D"https://jpn01.safelinks.protection.outlook.com/?url=3Dhttps=
%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-thubert-6lo-multicast-registrat=
&amp;data=3D04%7C01%7Cklaus.hueske%40renesas.com%7C943f04d7e534476d6b0408d9=
936c8972%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C1%7C637702916655484980%7C=
Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL=
CJXVCI6Mn0%3D%7C3000&amp;sdata=3DrWwvFGz2BNKX1m8d6jl2M3wQPluqMi2SE72r5LFg%2=
B9E%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-thubert-6lo-multicast-registrat</a><=
br>
&gt; ion)<br>
&gt;<br>
&gt; The call will end on the 21st of October, EOB.<br>
&gt;<br>
&gt; Please state whether you are in favor of adopting this document.<br>
&gt;<br>
&gt; Also, any comments you may have, and/or expressions of interest to <br=
>
&gt; review the document, will be very much appreciated.<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; Shwetha and Carles<br>
&gt;<br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; 6lo mailing list<br>
&gt; <a href=3D"mailto:6lo@ietf.org">6lo@ietf.org</a><br>
&gt; <a href=3D"https://jpn01.safelinks.protection.outlook.com/?url=3Dhttps=
%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2F6lo&amp;data=3D04%7C01%7Cklaus=
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https://www.ietf.org/mailman/listinfo/6lo</a><br>
&gt;<br>
<br>
<br>
_______________________________________________<br>
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<br>
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<p style=3D"font-size:8pt;">Renesas Electronics Europe GmbH, Geschaeftsfueh=
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From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Wed, 20 Oct 2021 16:56:34 +0200
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On Wed, Oct 20, 2021 at 12:08 AM Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> Abdussalam Baryun <abdussalambaryun@gmail.com> wrote:
>     > I think it is better to assign AODV_RPL using 5. Not sure why just
>     > because not much used P2P_RPL we change to another protocol, is this
>     > option taken often in IETF WGs.
>
> Until we do RPL v2 with MOPEX, we'll have only 1 MOP value left (6).
> AODV_RPL replaces/upgrades P2P_RPL.
> We think that P2P_RPL isn't widely deployed.
>
> I replied to the request of WG chair asking what WG thinks.
The AD commented before that there was not much discussion in WG which is
negative sign.
It is still difficult to notice what the WG thinks, so not sure what you
mean by We_think.

AB

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

<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 20, 2021 at 12:08 AM Mich=
ael Richardson &lt;<a href=3D"mailto:mcr%2Bietf@sandelman.ca">mcr+ietf@sand=
elman.ca</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-le=
ft:1ex"><br>
Abdussalam Baryun &lt;<a href=3D"mailto:abdussalambaryun@gmail.com" target=
=3D"_blank">abdussalambaryun@gmail.com</a>&gt; wrote:<br>
=C2=A0 =C2=A0 &gt; I think it is better to assign AODV_RPL using 5. Not sur=
e why just<br>
=C2=A0 =C2=A0 &gt; because not much used P2P_RPL we change to another proto=
col, is this<br>
=C2=A0 =C2=A0 &gt; option taken often in IETF WGs.<br>
<br>
Until we do RPL v2 with MOPEX, we&#39;ll have only 1 MOP value left (6).<br=
>
AODV_RPL replaces/upgrades P2P_RPL.<br>
We think that P2P_RPL isn&#39;t widely deployed.<br><br></blockquote><div>I=
 replied to the request of WG chair asking what WG thinks.=C2=A0</div><div>=
The AD commented before that there was not much discussion in WG which is n=
egative sign.</div><div>It is still difficult to notice what the WG thinks,=
 so not sure what you mean by We_think.</div><div><br></div><div>AB=C2=A0</=
div></div></div>

--000000000000c0c51005cec9fe49--


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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Wed, 20 Oct 2021 20:30:57 +0300
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Subject: Re: [Roll] Last Call on MOP for AODV-RPL
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Thank you Abdussalam and Michael for your comments, we will consider them.
I understand that Michael was referring to the Mailing list discussions,
where it was highlighted that P2P_RPL is not widely deployed.  Please let
us know if you are aware of some deployment.

BR,
Ines





On Wed, Oct 20, 2021 at 5:57 PM Abdussalam Baryun <
abdussalambaryun@gmail.com> wrote:

>
>
> On Wed, Oct 20, 2021 at 12:08 AM Michael Richardson <mcr+ietf@sandelman.ca>
> wrote:
>
>>
>> Abdussalam Baryun <abdussalambaryun@gmail.com> wrote:
>>     > I think it is better to assign AODV_RPL using 5. Not sure why just
>>     > because not much used P2P_RPL we change to another protocol, is this
>>     > option taken often in IETF WGs.
>>
>> Until we do RPL v2 with MOPEX, we'll have only 1 MOP value left (6).
>> AODV_RPL replaces/upgrades P2P_RPL.
>> We think that P2P_RPL isn't widely deployed.
>>
>> I replied to the request of WG chair asking what WG thinks.
> The AD commented before that there was not much discussion in WG which is
> negative sign.
> It is still difficult to notice what the WG thinks, so not sure what you
> mean by We_think.
>
> AB
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>

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<div dir=3D"ltr">Thank you Abdussalam and Michael for your comments,=C2=A0w=
e will consider them.<div>I understand that Michael was referring=C2=A0to t=
he Mailing list discussions, where it was highlighted that P2P_RPL is not w=
idely deployed.=C2=A0 Please let us know if you are aware of some deploymen=
t.=C2=A0</div><div><br></div><div>BR,</div><div>Ines</div><div><br></div><d=
iv><br><div><br></div><div><br></div></div></div><br><div class=3D"gmail_qu=
ote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 20, 2021 at 5:57 PM =
Abdussalam Baryun &lt;<a href=3D"mailto:abdussalambaryun@gmail.com">abdussa=
lambaryun@gmail.com</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"><div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 20, 20=
21 at 12:08 AM Michael Richardson &lt;<a href=3D"mailto:mcr%2Bietf@sandelma=
n.ca" target=3D"_blank">mcr+ietf@sandelman.ca</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"><br>
Abdussalam Baryun &lt;<a href=3D"mailto:abdussalambaryun@gmail.com" target=
=3D"_blank">abdussalambaryun@gmail.com</a>&gt; wrote:<br>
=C2=A0 =C2=A0 &gt; I think it is better to assign AODV_RPL using 5. Not sur=
e why just<br>
=C2=A0 =C2=A0 &gt; because not much used P2P_RPL we change to another proto=
col, is this<br>
=C2=A0 =C2=A0 &gt; option taken often in IETF WGs.<br>
<br>
Until we do RPL v2 with MOPEX, we&#39;ll have only 1 MOP value left (6).<br=
>
AODV_RPL replaces/upgrades P2P_RPL.<br>
We think that P2P_RPL isn&#39;t widely deployed.<br><br></blockquote><div>I=
 replied to the request of WG chair asking what WG thinks.=C2=A0</div><div>=
The AD commented before that there was not much discussion in WG which is n=
egative sign.</div><div>It is still difficult to notice what the WG thinks,=
 so not sure what you mean by We_think.</div><div><br></div><div>AB=C2=A0</=
div></div></div>
_______________________________________________<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>

--0000000000002feca705cecc26f2--


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Subject: [Roll] Benjamin Kaduk's Discuss on draft-ietf-roll-aodv-rpl-11: (with DISCUSS and COMMENT)
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Benjamin Kaduk has entered the following ballot position for
draft-ietf-roll-aodv-rpl-11: 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
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for more information about how to handle 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:
----------------------------------------------------------------------

Thanks for the updates in the -11, they are a bit improvement.

(1) I did make a point of looking into the procedures for determining
whether a route will be symmetric or asymmetric, and I'm running into
trouble for the case where an intermediate router determines that a link
cannot work as part of a symmetric route.

For concreteness, let's consider the following snippet of topology:

  +-------+                   +-------+                   +-------+
  |       |    asymmetric     |       |                   |       |
  |   A   +-------------------+   B   +===================+   C   |
  |       |       L1          |       |       L2          |       |
  +-------+                   +-------+                   +-------+

Suppose that an RREQ-DIO arrives at A with S=1 and H=0.  Per step 3 of
§6.2.1, if the link the RREQ-DIO arrived on satisfies the objective
function, the outgoing RREQ-DIO is also transmitted with S=1.
A also associates state with its RREQ-Instance the value of the S bit
from the transmitted RREQ-DIO, i.e., 1.
That RREQ-DIO arrives at B, who performs the same check and determines
that the L1 cannot satisfy the objective function.  Accordingly, B sends
out a RREQ-DIO to C with S=0 and stores the state S=0.  The RREQ-DIO
continues to through C to TargNode (or maybe C is TargNode; it may not
matter), and TargNode proceeds to follow asymmetric procedures,
initiating an RREP-DIO with an initially empty address vector.  That
RREP-DIO arrives at C, who has stored state S=0, so C joins the DODAG of
the RREP-Instance, adds its address to the address vector (per step 4 of
§6.4), and sends an RREP-DIO to B.  B likewise has stored state S=0,
adds its address to the address vector, and sends an RREP-DIO to A.  But
A has stored state S=1, so in step 4 of §6.4, A is looking for an
address in the address vector to use as the unicast target for A's
outgoing RREP-DIO.  But there is no such entry in the address vector,
becuase up to now the RREP-DIO has been using asymmetric procedures, and
has no data on how to get from A to OrigNode!

Now, it's certainly possible that I've made an error in the above.  But
even if I have, it still seems suggestive that this boundary behavior is
pretty complicated and hard to get right.  It seems like we should have
some similar discussion in the document to cover how this case does
actually work.

(And if I didn't make an error in the above, it seems to still be
salvageable, with B storing a sentinel value of "I changed from S=1 to
S=0" instead of just 1 or 0, and holding on to the (symmetric) address
vector from OrigNode to B.  Then B could perform translation from the
asymmetric to symmetric regime for the RREP and all routers on the path
would be able to install useful route entries.  But there's not anything
in the current text to suggest that B should be doing that.)

(2) I'm putting this in the Discuss section because I think it's
important for the authors/WG to produce an answer.  Since I've been
wrong about it at least once, I do not claim to know the correct answer,
and thus the Discuss point ought to be easy to resolve.

Section 6.3.3 says:

                          Instead, the RPLInstanceID MUST be replaced by
   another value so that the two RREP-instances can be distinguished.
   In RREP-DIO option, the Shift field of the RREP-DIO message(Figure 2)
   indicates the shift to be applied to original RPLInstanceID to obtain
   the replacement RPLInstanceID.  When the new RPLInstanceID after
   shifting exceeds 255, it rolls over starting at 0.  For example, if
   the original RPLInstanceID is 252, and shifted by 6, the new
   RPLInstanceID will be 2. [...]

I know that the use of 255 as the largest value here comes as a result
of my earlier review, but wanted to note that the resulting discussion
thread may not have fully concluded.
In particular, I now see
https://datatracker.ietf.org/doc/html/rfc6550#section-5.1 that does
indicate that only 6 bits of "usable" ID are present for local
RPLInstanceIDs, which seem to be the ones in use here.  Sorry to have
missed that in my initial review; I hope that we can figure out what the
actual correct boundary value is.


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Some of the text I comment on below is new in the -11, and I would have
hoped that WG review of the changes would have detected more of this
type of thing.  This leaves me uncertain what level of review the WG
actually performed, and I am considering balloting Abstain once my
discuss points are resolved.

Section 3

   to TargNode, and another from TargNode to OrigNode.  When possible,
   AODV-RPL also enables symmetric route discovery along Paired DODAGs
   (see Section 5).

(Modifying a comment I made on the -10) Perhaps we could say "AODV-RPL
also enables discvoery of symmetric routes along Paired DODAGs when
symmetric routes are possible (see Section 5)"?

Section 4.2

   L
      2-bit unsigned integer defined as in RREQ option.

Per the discussion on my previous ballot thread, I suggest adding "The
lifetime of the RREP-Instance MUST be shorter than the lifetime of the
RREQ-Instance it is paired to" (or similar).

Section 4.3

   Target Prefix / Address
      (variable-length field) An IPv6 destination address or prefix.
      The Prefix Length field contains the number of valid leading bits
      in the prefix.  The Target Prefix / Address field contains the
      least number of octets that can represent all of the bits of the
      Prefix, in other words Ceil(Prefix Length/8) octets.  The initial
      bits in the Target Prefix / Address field preceding the prefix
      length (if any) MUST be set to zero on transmission and MUST be
      ignored on receipt.  If Prefix Length is zero, the Address field
      is 128 bits for IPv6 addresses.

This is a change from the -10 about where the target prefix is aligned
for prefix lengths that are not a multiple of 8.
I have no stance on which formulation is best, but it seems very
surprising to change the wire encoding in this manner at such a late
stage in the document lifecycle, without specific compelling reasoning.

Section 6.2.1

   Step 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.
   [...]
   Step 3:

      If the S bit of the incoming RREQ-DIO is 0, then the route cannot
      be symmetric, and the S bit of the RREQ-DIO to be transmitted is
      set to 0.  Otherwise, the router MUST determine whether the
      downward (i.e., towards the TargNode) direction of the incoming
      link satisfies the OF.  If so, the S bit of the RREQ-DIO to be
      transmitted is set to 1.  Otherwise the S bit of the RREQ-DIO to
      be transmitted is set to 0.

The step 1 procedure checks the downstream direction of the incoming
link, and the step 3 procedure also checks the dosntream direction of
the incoming link.  In order to assess whether the link works as a
symmetric link, I think that these checks need to be on different
directions of that link, but am not confident about which step should
check which direction.

section 6.3

                                                              If the
   implementation selects the symmetric route, and the L field is not 0,
   the TargNode MAY delay transmitting the RREP-DIO for duration
   RREP_WAIT_TIME to await a route with a lower Rank.  The value of

In the -10 the text allowing waiting was present in both the section for
the symmetric case and the section for the asymmetric case; is the
conditional "if the implementation selects the symmetric route" correct?

Section 6.3.2

   When a RREQ-DIO arrives at a TargNode with the S bit set to 0, the
   TargNode MUST build a DODAG in the RREP-Instance corresponding to the
   RREQ-DIO, rooted at itself in order to discover the downstream route

nit: this comma is misplaced (and may not be needed at all).

Section 6.4

   Upon receiving a RREP-DIO, a router performs the following steps:

   Step 1:

      If the Objective Function is not satisfied, the router MUST NOT
      join the DODAG; the router MUST discard the RREQ-DIO, and does not

s/RREQ/RREP/?

      If the S-bit of the RREQ-Instance is set to 0, the router MUST
      determine whether the downward direction of the link (towards the
      TargNode) over which the RREP-DIO is received satisfies the
      Objective Function, and the router's Rank would not exceed the
      MaxRank limit.  If so, the router joins the DODAG of the RREP-
      Instance.  The router that transmitted the received RREP-DIO is
      selected as the preferred parent.  Afterwards, other RREP-DIO
      messages can be received.

Please confirm whether "downward direction" is correct.  It seems to me
that in determining whether to join the RREP-Instance, we need to check
whether the "reply path" (from TargNode to OrigNode) is feasible, and
skip joining the instance if it's not a feasible path.  But the text
written here seem to be checking the feasibility of the "request path",
the same direction that was checked in §6.2.1 when deciding whether to
join the RREQ-Instance.

Section 10

Thanks for acting on my previous comment and moving the normative
requirements on nodes to not emit RREPs if they have an address in the
address vector already!  I still think it would be worth some text here
in the security considerations about what goes wrong if those checks are
skipped (I think, a routing loop occurs, but that's something of a
guess).

It seems that if Compr is set too large, there is some risk of a node
failing to check that it shares that many bits of address prefix with
the address in the DODAGID and thus decompression would produce an
incorrect route.

   If a rogue router is able to forge a gratuitous RREP, significant
   damage might result.

Would this damage be in the form of traffic amplification, routing loop,
DoS of certain (key) nodes, ...?




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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

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<div dir=3D"ltr">Dear all,<br><div><br></div><div>Please find below the lin=
k to the ROLL Agenda for the IETF112,=C2=A0</div><div><br></div><div><a hre=
f=3D"https://datatracker.ietf.org/meeting/112/materials/agenda-112-roll-02"=
>https://datatracker.ietf.org/meeting/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 5th November.=C2=A0<br></div><div><br></di=
v><div>Comments welcome,</div><div><br></div><div>Thank you,</div><div><br>=
</div><div>Ines and Dominique</div></div>

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