
From nobody Wed Jun  1 02:54:02 2016
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From: "Benoit Claise" <bclaise@cisco.com>
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Subject: [manet] Benoit Claise's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Benoit Claise has entered the following ballot position for
draft-ietf-manet-rfc6779bis-06: No Objection

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

The introduction in section 1 needs to mention this message: This
revision to RFC 6779 is necessitated by the update to RFC 6130 specified
in RFC 7466.

Thanks for
https://tools.ietf.org/html/draft-ietf-manet-rfc6779bis-06#section-1.1

The MIB doctor review was done by Mike MacFaden.
And the rfcdiff between RFC6779 and this document looks about right.

Finally, keeping
https://www.ietf.org/iesg/statement/writable-mib-module.html in
consideration, I believe this work is clearly justified as it updates an
existing MIB module.



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Subject: [manet] Stephen Farrell's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Stephen Farrell has entered the following ballot position for
draft-ietf-manet-rfc6779bis-06: No Objection

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


- My review is based on the diff at [1]

- The security considerations section doesn't seem to
reflect the latest boilerplate. [2] Should it? I'm not
making this a discuss as it's a minor change to a MIB and
I accept that it's arguable that folks might not update
their SNMP security code whilst doing this. But I don't
think I've seen this case before (minor update to MIB
without changed security boilerplate) so maybe the IESG
should chat about it to decide if there's anything to be
done here.

   [1]
https://www.ietf.org/rfcdiff?url1=rfc6779&url2=draft-ietf-manet-rfc6779bis-06
   [2] https://trac.tools.ietf.org/area/ops/trac/wiki/mib-security



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On 6/1/16, 2:21 PM, "iesg on behalf of Stephen Farrell"
<iesg-bounces@ietf.org on behalf of
stephen.farrell@cs.tcd.ie> wrote:

Stephen:

Hi!

>- The security considerations section doesn't seem to
>reflect the latest boilerplate. [2] Should it? I'm not
>making this a discuss as it's a minor change to a MIB and
>I accept that it's arguable that folks might not update
>their SNMP security code whilst doing this. But I don't
>think I've seen this case before (minor update to MIB
>without changed security boilerplate) so maybe the IESG
>should chat about it to decide if there's anything to be
>done here.

The variations from the boilerplate are minimal:

Boilerplate>
   ...The support for SET operations in a non-secure
   environment without proper protection opens devices to attack.

...
   Implementations SHOULD provide the security features described by the
   SNMPv3 framework (see [RFC3410]), and implementations claiming
compliance=20
   to the SNMPv3 standard MUST include full support for authentication and
   privacy via the User-based Security Model (USM) [RFC3414] with the AES
   cipher algorithm [RFC3826].



rfc6779bis>
   ...The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.

...
   Implementations MUST provide the security features described by the
   SNMPv3 framework (see [RFC3410]), including full support for
   authentication and privacy via the User-based Security Model (USM)
   [RFC3414] with the AES cipher algorithm [RFC3826].


I don't have any issues with making the text match.

Alvaro.



>   [2] https://trac.tools.ietf.org/area/ops/trac/wiki/mib-security


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Subject: [manet] Kathleen Moriarty's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Kathleen Moriarty has entered the following ballot position for
draft-ietf-manet-rfc6779bis-06: No Objection

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

I'll wait for the response to Stephen's question as I also noticed the
boilerplate wasn't used (SecDir review did too, kinda).

I do appreciate the descriptions provided for the threats associated with
the read/write read/create objects.  Thanks for that.



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Subject: Re: [manet] Stephen Farrell's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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--------------ms050901030605030809040702
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On 01/06/16 20:04, Alvaro Retana (aretana) wrote:
> On 6/1/16, 2:21 PM, "iesg on behalf of Stephen Farrell"
> <iesg-bounces@ietf.org on behalf of
> stephen.farrell@cs.tcd.ie> wrote:
>=20
> Stephen:
>=20
> Hi!
>=20
>> - The security considerations section doesn't seem to
>> reflect the latest boilerplate. [2] Should it? I'm not
>> making this a discuss as it's a minor change to a MIB and
>> I accept that it's arguable that folks might not update
>> their SNMP security code whilst doing this. But I don't
>> think I've seen this case before (minor update to MIB
>> without changed security boilerplate) so maybe the IESG
>> should chat about it to decide if there's anything to be
>> done here.
>=20
> The variations from the boilerplate are minimal:

(But represent some arm-wrestling effort between SEC
and OPS ads:-)

>=20
> Boilerplate>
>    ...The support for SET operations in a non-secure
>    environment without proper protection opens devices to attack.
>=20
> ...
>    Implementations SHOULD provide the security features described by th=
e
>    SNMPv3 framework (see [RFC3410]), and implementations claiming
> compliance=20
>    to the SNMPv3 standard MUST include full support for authentication =
and
>    privacy via the User-based Security Model (USM) [RFC3414] with the A=
ES
>    cipher algorithm [RFC3826].
>=20
>=20
>=20
> rfc6779bis>
>    ...The support for SET operations in a non-secure
>    environment without proper protection can have a negative effect on
>    network operations.
>=20
> ...
>    Implementations MUST provide the security features described by the
>    SNMPv3 framework (see [RFC3410]), including full support for
>    authentication and privacy via the User-based Security Model (USM)
>    [RFC3414] with the AES cipher algorithm [RFC3826].
>=20
>=20
> I don't have any issues with making the text match.

Great. Like I said I don't think this is discuss-worthy,
but OTOH, if someone's updating their code then that is
a good time to update the security stuff too.

Cheers,
S.

>=20
> Alvaro.
>=20
>=20
>=20
>>   [2] https://trac.tools.ietf.org/area/ops/trac/wiki/mib-security
>=20


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From: Jiazi YI <ietf@jiaziyi.com>
To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
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Cc: manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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Hi Chris,

On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
chris.dearlove@baesystems.com> wrote:

> I will at some point find my editorial comments.
>

Thanks very much.


>
>
> While the below is generally as discussed, I don=E2=80=99t think the
> SR_TC_INTERVAL point captures all of my concern.
>


In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL
doesn't imply that the related links have longer validity time. All the
MP-OLSR routers have to generate TC messages as required by OLSR.

The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_ROUTE
TLV (so that the other routers can learn that the originators support
source routing), in case they are not required to generate TC messages.

best

Jiazi



>
>
> We have some routers putting out infrequent TCs. This must mean they have
> long validity times. But there is nothing inherently different about thos=
e
> links, they can be chosen by pot luck.
>
>
>
> (Example, four routers in a square, all sides are links, diagonals are
> not. Each will pick one neighbour as an MPR. Each link will have a 1/2
> chance of being advertised in each direction, all else being equal.)
>
>
>
> So why can we accept some links having long durations? If any link could,
> then why not have a long TC_INTERVAL everywhere? (If worried about
> convergence, set either a short initial value or a short minimum interval=
.)
> If not, then consider a non-MP router. To it, those are just links like a=
ny
> other. And may have long validity time but short useful lifetime (that=E2=
=80=99s
> the situation we=E2=80=99ve reached here). Which is bad.
>
>
>
> You note simulations done. But what simulations have been done on
> scenarios with mixed MP and non-MP routers, mobility such that basic
> TC_INTERVAL is appropriate but not overshort, and scenarios/density where
> there are MP routers not picked as MPRs? Because that=E2=80=99s the probl=
em case
> here.
>
>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
> *Sent:* 30 May 2016 22:25
> *To:* manet
> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> **** **WARNING ******
> EXTERNAL EMAIL -- This message originates from outside our organization.
>
>
>
> Hi all,
>
>
>
> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
> valuable comments from Chris -- thanks very much!
>
>
>
> Based on the comments received, a new revision will be submitted soon wit=
h
> following updates:
>
>
>
>    - Make the style more consistent with other OLSRv2-RFC suite.
>
>
>
>    - Make the reactive multipath calculation optional. Both proactive and
> reactive calculation can be used. Such modification won't impact
> interoperability.
>
>
>
>    - Clarify the use of SR_TC_INTERVAL.
>
>
>
>    - Clarify the generation/update of Multi-path routing Set (this is
> related to reactive/proactive calculation also)
>
>
>
>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>
>
>
>    - Chris raised the concern about impact partial topology map on
> multipath calculation. As indicated in
> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html , with
> non-trival amount of studies performed, no issue related to this has been
> reported yet. As it's related to the MPR-selection algorithm used, we can
> put it as one of the experimental points to make people pay attention to
> it, so that new issues can be reported.
>
>
>
> regards
>
>
>
> Jiazi
>
> ********************************************************************
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>

--001a114a6aaccec1cc05343dc157
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Chris,=C2=A0<br><div class=3D"gmail_extra"><br><div cla=
ss=3D"gmail_quote">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (U=
K) <span dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padd=
ing-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I will at some point find my editorial comme=
nts.</span></p></div></div></blockquote><div><br></div><div>Thanks very muc=
h.</div><div>=C2=A0=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;borde=
r-left-color:rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-GB" link=3D=
"blue" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">While the below is generally as discussed, I=
 don=E2=80=99t think the SR_TC_INTERVAL point captures all of my concern.</=
span></p></div></div></blockquote><div><br></div><div><br></div><div>In fac=
t, as I mentioned in my previous post, the longer SR_TC_INTERVAL doesn&#39;=
t imply that the related links have longer validity time. All the MP-OLSR r=
outers have to generate TC messages as required by OLSR.=C2=A0</div><div><b=
r></div><div>The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise =
SOURCE_ROUTE TLV (so that the other routers can learn that the originators =
support source routing), in case they are not required to generate TC messa=
ges.=C2=A0</div><div><br></div><div>best</div><div><br></div><div>Jiazi</di=
v><div><br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;=
border-left-color:rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-GB" li=
nk=3D"blue" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"fon=
t-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">We have some routers putting out infrequent =
TCs. This must mean they have long validity times. But there is nothing inh=
erently different about those links,
 they can be chosen by pot luck.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">(Example, four routers in a square, all side=
s are links, diagonals are not. Each will pick one neighbour as an MPR. Eac=
h link will have a 1/2 chance of being
 advertised in each direction, all else being equal.)<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">So why can we accept some links having long =
durations? If any link could, then why not have a long TC_INTERVAL everywhe=
re? (If worried about convergence, set
 either a short initial value or a short minimum interval.) If not, then co=
nsider a non-MP router. To it, those are just links like any other. And may=
 have long validity time but short useful lifetime (that=E2=80=99s the situ=
ation we=E2=80=99ve reached here). Which is bad.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">You note simulations done. But what simulati=
ons have been done on scenarios with mixed MP and non-MP routers, mobility =
such that basic TC_INTERVAL is appropriate
 but not overshort, and scenarios/density where there are MP routers not pi=
cked as MPRs? Because that=E2=80=99s the problem case here.<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" value=3D"+441245242194" target=3D"_blank">+44 (0)1245 242194<=
/a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;font=
-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"fo=
nt-size:10pt;font-family:Tahoma,sans-serif"> manet [mailto:<a href=3D"mailt=
o:manet-bounces@ietf.org" target=3D"_blank">manet-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:Arial,sans-serif;color:black"><u></u>=
=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15pt;font-family:Arial,sans-serif;col=
or:rgb(51,57,114)">*** WARNING ***<u></u><u></u></span></b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background:white">
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51,57,114)">This message originates from outside our organisation, either f=
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<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
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ial,sans-serif">WARNING
</span></strong><strong><span style=3D"font-family:Arial,sans-serif">***</s=
pan></strong><span style=3D"font-size:8.5pt;font-family:Arial,sans-serif"><=
br>
</span><span style=3D"font-size:10pt;font-family:Arial,sans-serif">EXTERNAL=
 EMAIL -- This message originates from outside our organization</span><span=
 style=3D"font-size:8.5pt;font-family:Arial,sans-serif">.</span><u></u><u><=
/u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div></div></div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************</p></d=
iv>

</blockquote></div><br></div></div>

--001a114a6aaccec1cc05343dc157--


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References: <20160601182154.16139.60497.idtracker@ietfa.amsl.com> <D374A7B9.12A3A1%aretana@cisco.com> <574F3446.5010803@cs.tcd.ie>
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From: Ulrich Herberg <ulrich@herberg.name>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [manet] Stephen Farrell's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Stephen,

I have no concerns with matching the text to the boilerplate. There
is one extra paragraph in addition to the minimal differences that
Alvaro pointed out:

"MANET technology is often deployed to support communications of
emergency services or military tactical applications. In these
applications, it is imperative to maintain the proper operation of the
communications network and to protect sensitive information related to
its operation. Therefore, it is RECOMMENDED to provide support for the
Transport Security Model (TSM) [RFC5591] in combination with TLS/DTLS
[RFC6353]."

I am fine with removing this also to match the boiler plate 100%.

Best regards
Ulrich

On Wed, Jun 1, 2016 at 12:15 PM, Stephen Farrell
<stephen.farrell@cs.tcd.ie> wrote:
>
>
> On 01/06/16 20:04, Alvaro Retana (aretana) wrote:
>> On 6/1/16, 2:21 PM, "iesg on behalf of Stephen Farrell"
>> <iesg-bounces@ietf.org on behalf of
>> stephen.farrell@cs.tcd.ie> wrote:
>>
>> Stephen:
>>
>> Hi!
>>
>>> - The security considerations section doesn't seem to
>>> reflect the latest boilerplate. [2] Should it? I'm not
>>> making this a discuss as it's a minor change to a MIB and
>>> I accept that it's arguable that folks might not update
>>> their SNMP security code whilst doing this. But I don't
>>> think I've seen this case before (minor update to MIB
>>> without changed security boilerplate) so maybe the IESG
>>> should chat about it to decide if there's anything to be
>>> done here.
>>
>> The variations from the boilerplate are minimal:
>
> (But represent some arm-wrestling effort between SEC
> and OPS ads:-)
>
>>
>> Boilerplate>
>>    ...The support for SET operations in a non-secure
>>    environment without proper protection opens devices to attack.
>>
>> ...
>>    Implementations SHOULD provide the security features described by the
>>    SNMPv3 framework (see [RFC3410]), and implementations claiming
>> compliance
>>    to the SNMPv3 standard MUST include full support for authentication and
>>    privacy via the User-based Security Model (USM) [RFC3414] with the AES
>>    cipher algorithm [RFC3826].
>>
>>
>>
>> rfc6779bis>
>>    ...The support for SET operations in a non-secure
>>    environment without proper protection can have a negative effect on
>>    network operations.
>>
>> ...
>>    Implementations MUST provide the security features described by the
>>    SNMPv3 framework (see [RFC3410]), including full support for
>>    authentication and privacy via the User-based Security Model (USM)
>>    [RFC3414] with the AES cipher algorithm [RFC3826].
>>
>>
>> I don't have any issues with making the text match.
>
> Great. Like I said I don't think this is discuss-worthy,
> but OTOH, if someone's updating their code then that is
> a good time to update the security stuff too.
>
> Cheers,
> S.
>
>>
>> Alvaro.
>>
>>
>>
>>>   [2] https://trac.tools.ietf.org/area/ops/trac/wiki/mib-security
>>
>


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From: Ulrich Herberg <ulrich@herberg.name>
To: Benoit Claise <bclaise@cisco.com>
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Cc: manet-chairs@ietf.org, Christopher Dearlove <chris.dearlove@baesystems.com>, manet@ietf.org, Michael MacFaden <mrm@vmware.com>, The IESG <iesg@ietf.org>, draft-ietf-manet-rfc6779bis@ietf.org
Subject: Re: [manet] Benoit Claise's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Benoit,

thanks, I have added that sentence after the first sentence in section
1.1 (assuming that this is where you wanted to add it).

Best regards
Ulrich

On Wed, Jun 1, 2016 at 2:53 AM, Benoit Claise <bclaise@cisco.com> wrote:
> Benoit Claise has entered the following ballot position for
> draft-ietf-manet-rfc6779bis-06: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> The introduction in section 1 needs to mention this message: This
> revision to RFC 6779 is necessitated by the update to RFC 6130 specified
> in RFC 7466.
>
> Thanks for
> https://tools.ietf.org/html/draft-ietf-manet-rfc6779bis-06#section-1.1
>
> The MIB doctor review was done by Mike MacFaden.
> And the rfcdiff between RFC6779 and this document looks about right.
>
> Finally, keeping
> https://www.ietf.org/iesg/statement/writable-mib-module.html in
> consideration, I believe this work is clearly justified as it updates an
> existing MIB module.
>
>


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From: Ulrich Herberg <ulrich@herberg.name>
To: Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com>
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Subject: Re: [manet] Kathleen Moriarty's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Kathleen,

I wouldn't go as far as saying that "the boilerplate wasn't used";
there was only a minor difference to the boilerplate. I am not sure
where it came from. We copied that section from RFC6779, so my only
guess is that the boilerplate has changed since then (but I haven't
verified). Either way, I have prepared a new revision that uses the
same text as in the boilerplate.

Best regards
Ulrich

On Wed, Jun 1, 2016 at 12:14 PM, Kathleen Moriarty
<Kathleen.Moriarty.ietf@gmail.com> wrote:
> Kathleen Moriarty has entered the following ballot position for
> draft-ietf-manet-rfc6779bis-06: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> I'll wait for the response to Stephen's question as I also noticed the
> boilerplate wasn't used (SecDir review did too, kinda).
>
> I do appreciate the descriptions provided for the threats associated with
> the read/write read/create objects.  Thanks for that.
>
>


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Subject: Re: [manet] Benoit Claise's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Thank you Ulrich.

Regards, B.
> Benoit,
>
> thanks, I have added that sentence after the first sentence in section
> 1.1 (assuming that this is where you wanted to add it).
>
> Best regards
> Ulrich
>
> On Wed, Jun 1, 2016 at 2:53 AM, Benoit Claise <bclaise@cisco.com> wrote:
>> Benoit Claise has entered the following ballot position for
>> draft-ietf-manet-rfc6779bis-06: No Objection
>>
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/
>>
>>
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>> The introduction in section 1 needs to mention this message: This
>> revision to RFC 6779 is necessitated by the update to RFC 6130 specified
>> in RFC 7466.
>>
>> Thanks for
>> https://tools.ietf.org/html/draft-ietf-manet-rfc6779bis-06#section-1.1
>>
>> The MIB doctor review was done by Mike MacFaden.
>> And the rfcdiff between RFC6779 and this document looks about right.
>>
>> Finally, keeping
>> https://www.ietf.org/iesg/statement/writable-mib-module.html in
>> consideration, I believe this work is clearly justified as it updates an
>> existing MIB module.
>>
>>
> .
>


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From: kathleen.moriarty.ietf@gmail.com
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Date: Thu, 2 Jun 2016 09:34:38 -0400
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To: Ulrich Herberg <ulrich@herberg.name>
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Cc: "manet-chairs@ietf.org" <manet-chairs@ietf.org>, Christopher Dearlove <chris.dearlove@baesystems.com>, "manet@ietf.org" <manet@ietf.org>, The IESG <iesg@ietf.org>, "draft-ietf-manet-rfc6779bis@ietf.org" <draft-ietf-manet-rfc6779bis@ietf.org>
Subject: Re: [manet] Kathleen Moriarty's No Objection on draft-ietf-manet-rfc6779bis-06: (with COMMENT)
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Sent from my iPhone

> On Jun 2, 2016, at 1:25 AM, Ulrich Herberg <ulrich@herberg.name> wrote:
> 
> Kathleen,
> 
> I wouldn't go as far as saying that "the boilerplate wasn't used";
> there was only a minor difference to the boilerplate. I am not sure
> where it came from. We copied that section from RFC6779, so my only
> guess is that the boilerplate has changed since then (but I haven't
> verified). Either way, I have prepared a new revision that uses the
> same text as in the boilerplate.

Thanks for using the updated boilerplate.

Best regards,
Kathleen 

> 
> Best regards
> Ulrich
> 
> On Wed, Jun 1, 2016 at 12:14 PM, Kathleen Moriarty
> <Kathleen.Moriarty.ietf@gmail.com> wrote:
>> Kathleen Moriarty has entered the following ballot position for
>> draft-ietf-manet-rfc6779bis-06: No Objection
>> 
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>> 
>> 
>> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>> 
>> 
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/
>> 
>> 
>> 
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>> 
>> I'll wait for the response to Stephen's question as I also noticed the
>> boilerplate wasn't used (SecDir review did too, kinda).
>> 
>> I do appreciate the descriptions provided for the threats associated with
>> the read/write read/create objects.  Thanks for that.
>> 
>> 


From nobody Thu Jun  2 08:28:24 2016
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Subject: [manet] ACM CHANTS 2016 (colocated with ACM MobiCom'16): Call for Papers and Demos - Deadline extended
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===============================================================================

*                  *** NEW SUBMISSION DEADLINE: June 23, 2016 ***
* Please register your paper early, updates are possible until the deadline!

===============================================================================
===============================================================================

            ACM CHANTS 2016 - 11th Workshop on Challenged Networks            

                       co-located with ACM MobiCom 2016                       
                        October 7, 2016, New York, USA

                             www.acm-chants.org                              

===============================================================================
===============================================================================


Challenged networks comprise those situations where communication is desired,
but traditional Internet architectures fail to provide it effectively. Such
networks may be characterized by intermittent connectivity, a heterogeneous mix
of nodes, frequent nodal churn, and widely varying network conditions. Examples
of challenged networks include deployments in rural and remote areas, networks
to support emergency response operations, inter-planetary networks, sensor and
wildlife monitoring networks, underwater networks, road vehicle networks, and,
more recently, networks of micro aerial vehicles. The applications of challenged
networks range from time-critical communications such as for disaster relief to
delay-tolerant transmission in poorly connected regions or where censorship
should be counteracted. However, challenged networking has also found many
applications in everyday settings, for which they were not initially conceived,
such as opportunistic networking supporting data-centric communications, traffic
offloading from cellular networks, mobile cloud/edge computing, opportunistic
and participatory sensing, challenged IoT. The increasing availability of
wireless communications in embedded devices as well as integration of
technologies such as Wi-Fi direct on Android platforms and LTE's D2D
(device-to-device) communication on general purpose mobile devices, will further
push the development of challenged networking solutions. Challenged networking
has also chartered new directions for inter-disciplinary research, e.g.,
applying findings from social networks and network science.

This workshop builds on the success of the ten previous CHANTS workshops, and
WDTN 2005, and aims to stimulate research on the most novel topics of challenged
networking research. This year's edition encourages submission of theoretical
and experimental work (including studies of real deployment), with a primary
interest in the **new directions of challenged networking such as mobile
cloud/mobile edge computing, IoT, mobile data offloading, and challenged SDN**.
The workshop seeks original work presented in the form of research papers
describing new research approaches and results, as well as demo submissions.
Highly disruptive work-in-progress and position papers are also welcome,
provided they focus on particularly innovative, out-of-the-box, solutions or
applications for challenged networks. All papers shall be forward-looking,
describe their relationship to existing work, and shall argue their impact and
implications for ongoing or future research.

Topics of interest include, but are not limited to:

- Delay/disruption-tolerant networks (DTNs), opportunistic communication and computing
- Architecture, design, and implementation of communication systems for challenged networks
- Modeling, analysis, and characterization of challenged networks and protocols
- Challenged networking techniques for mobile cloud computing
- Mobile data offloading via challenged networks
- Challenged networking techniques for participatory and opportunistic sensing
- Challenged networking in the Internet of Things
- Big data analytics in challenged networking
- Software-defined networking in challenged environments
- Security/trust/privacy concerns and solutions in challenged networks
- Energy-efficient communication in challenged networks
- Information centric and content-centric networking in challenged networks
- Real-world mobility trace collection, analysis, and modeling for challenged environments
- Network science methods for challenged networks
- Network coding in challenged networks
- Novel challenged networking systems (e.g., networks of micro aerial vehicles)
- Real deployment and case studies in various stages of use
- Disrupted scenarios for challenged networks (e.g., disaster relief and emergency management)
- Daily use applications (e.g., mobile social networking, crowdsourcing, censorship evasion, sensor networks, smart cities)
- Test and simulation tools for evaluating challenged network systems
- Configuration, management, and monitoring of challenged networks.

PAPER FORMAT AND SUBMISSION INSTRUCTIONS
----------------------------------------
Submitted papers must be no longer than 6 pages, and should adhere to the
standard ACM conference proceedings format. Demo proposals (to be published as
part of the proceedings) must not be longer than 2 pages plus 1 page description
of the precise setup and requirements (the 1-page setup description will not be
published in the proceedings). Reviews will be single-blinded. Papers should
neither have been published elsewhere nor being currently under review by
another conference or journal.


EDITORIAL FOLLOW-UPS
--------------------
Extended versions of the selected workshop papers will be considered for
possible fast track publication on the Computer Communications Journal
(Elsevier), in a special section on Challenged Networks.

IMPORTANT DATES
---------------

- Submission Deadline (extended): 23 June 2016
- Acceptance Notification:        22 July 2016
- Camera Ready Due:              5 August 2016
- Workshop:                     7 October 2016


PROGRAM COMMITTEE CHAIRS
------------------------
Chiara Boldrini (IIT-CNR, Italy)
Marcelo Dias de Amorim (UPMC and CNRS, France)

TECHNICAL PROGRAM COMMITTEE
---------------------------
Kevin Almeroth (UC-Santa Barbara, USA)
Mostafa Ammar (Georgia Institute of Technology, USA)
Fehmi Ben Abdesslem (SICS Swedish ICT, Sweden)
Guohong Cao (The Pennsylvania State University, USA)
Marco Cello (Nokia Bell Labs)
Vania Conan (Thales Communications & Security, France)
Luis Costa (Universidade Federal do Rio de Janeiro, Brazil)
Do Young Eun (North Carolina State University, USA)
Kevin Fall (Carnegie Mellon University, USA)
Stephen Farrell (Trinity College Dublin, Ireland)
Domenico Giustiniano (IMDEA Networks Institute, Spain)
Tristan Henderson (University of St Andrews, UK)
Andrea Hess (Trinity College Dublin, Ireland)
Pan Hui (Hong Kong Unive. of Science and Technology)
Karin Anna Hummel (JKU Linz, Austria)
Mohan Kumar (Rochester Institute of Technology, USA)
Kyunghan Lee (UNIST, Korea)
Anders Lindgren (SICS Swedish ICT, Sweden)
Mirco Musolesi (University College London, UK)
Katia Obraczka (UC Santa Cruz, USA)
Melek Onen (Eurecom, France)
Joerg Ott (Technische Universitat Munchen, Germany)
Elena Pagani (Universita degli Studi di Milano, Italy)
Andrea Passarella (IIT-CNR, Italy)
Eric Rozner (IBM Research, USA)
Pavlos Sermpezis (FORTH, Greece)
Thrasyvoulos Spyropoulos (Eurecom, France)
Stavros Toumpis (Athens University of Economics and Business, Greece)
Thierry Turletti (INRIA, France)
Yu Wang (University of North Carolina at Charlotte, USA)
Eiko Yoneki (University of Cambridge, UK)
Xiaolan Zhang (Fordham University, USA)

WEB CHAIR
---------
Fehmi Ben Abdesslem (SICS Swedish ICT, Sweden)

PUBLICITY CHAIR
---------------
Elisabetta Biondi (IIT-CNR, Italy)

STEERING COMMITTEE
------------------
Kevin Almeroth (UC Santa Barbara, USA)
Kevin Fall (Carnegie Mellon University, USA)
Stephen Farrell (Trinity College Dublin, Ireland)
Jorg Ott (Technische Universitat Munchen, Germany)
Andrea Passarella (IIT-CNR, Italy)


From nobody Thu Jun  2 09:08:11 2016
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Subject: [manet] manet - New Meeting Session Request for IETF 96
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A new meeting session request has just been submitted by Justin Dean, a Chair of the manet working group.


---------------------------------------------------------
Working Group Name: Mobile Ad-hoc Networks
Area Name: Routing Area
Session Requester: Justin Dean

Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 30
Conflicts to Avoid: 
 First Priority:  6lo pim homenet roll gaia rtgarea
 Second Priority: lwig pce  spring i2rs rtgwg
 Third Priority: idr anima netconf


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


From nobody Thu Jun  2 10:51:33 2016
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Subject: [manet] I-D Action: draft-ietf-manet-rfc6779bis-07.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Mobile Ad-hoc Networks of the IETF.

        Title           : Definition of Managed Objects for the Neighborhood Discovery Protocol
        Authors         : Ulrich Herberg
                          Robert G. Cole
                          Ian D Chakeres
                          Thomas Heide Clausen
	Filename        : draft-ietf-manet-rfc6779bis-07.txt
	Pages           : 71
	Date            : 2016-06-02

Abstract:
   This document revises, extends, and replaces RFC 6779.  It defines a
   portion of the Management Information Base (MIB) for use with network
   management protocols in the Internet community.  In particular, it
   describes objects for configuring parameters of the Neighborhood
   Discovery Protocol (NHDP) process on a router.  The extensions
   described in this document add objects and values to support the NHDP
   optimization specified in RFC 7466.  The MIB module defined in this
   document, denoted NHDP-MIB, also reports state, performance
   information, and notifications about NHDP.  This additional state and
   performance information is useful to troubleshoot problems and
   performance issues during neighbor discovery.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-manet-rfc6779bis-07

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-manet-rfc6779bis-07


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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


From nobody Fri Jun  3 13:25:20 2016
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From: Jiazi YI <ietf@jiaziyi.com>
Date: Fri, 3 Jun 2016 22:25:12 +0200
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To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
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Cc: manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <
chris.dearlove@baesystems.com> wrote:

> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps
> some guidance on what it should advertise as neighbours.
>
>
>
> I think if advertising at a slower rate, advertising any addresses either
> gets into the trap I described, or alternatively advertised with a short
> validity time then those links will be transient, which is a bad idea.
>
>
>
> I think what you want is something like (this is not actual suggested
> words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will
> nitpick over much greater, so perhaps in terms of the appropriate hold
> time) then the TC message SHOULD NOT report any addresses [unless the lin=
ks
> are known to be exceptionally stable] - the bit in [] could be included o=
r
> excluded. It=E2=80=99s basically an indication of when the SHOULD NOT can=
 be broken
> sensibly. Known to be stable can be taken from local link information,
> supplied by neighbour, plus local knowledge. But that may be too much
> detail to go into.
>

Is it necessary to specify that the router "SHOULD NOT report addresses" in
this case? I think it will be an "empty" TC message anyways? Because if a
router doesn't generate TC message with TC_INTERVAL, it generally means
that there is no link to report.

Jiazi


>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] *On Behalf Of *Jia=
zi
> YI
> *Sent:* 01 June 2016 21:59
> *To:* Dearlove, Christopher (UK)
> *Cc:* manet
> *Subject:* Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> Hi Chris,
>
>
>
> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
> chris.dearlove@baesystems.com> wrote:
>
> I will at some point find my editorial comments.
>
>
>
> Thanks very much.
>
>
>
>
>
> While the below is generally as discussed, I don=E2=80=99t think the
> SR_TC_INTERVAL point captures all of my concern.
>
>
>
>
>
> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL
> doesn't imply that the related links have longer validity time. All the
> MP-OLSR routers have to generate TC messages as required by OLSR.
>
>
>
> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_ROUT=
E
> TLV (so that the other routers can learn that the originators support
> source routing), in case they are not required to generate TC messages.
>
>
>
> best
>
>
>
> Jiazi
>
>
>
>
>
>
>
> We have some routers putting out infrequent TCs. This must mean they have
> long validity times. But there is nothing inherently different about thos=
e
> links, they can be chosen by pot luck.
>
>
>
> (Example, four routers in a square, all sides are links, diagonals are
> not. Each will pick one neighbour as an MPR. Each link will have a 1/2
> chance of being advertised in each direction, all else being equal.)
>
>
>
> So why can we accept some links having long durations? If any link could,
> then why not have a long TC_INTERVAL everywhere? (If worried about
> convergence, set either a short initial value or a short minimum interval=
.)
> If not, then consider a non-MP router. To it, those are just links like a=
ny
> other. And may have long validity time but short useful lifetime (that=E2=
=80=99s
> the situation we=E2=80=99ve reached here). Which is bad.
>
>
>
> You note simulations done. But what simulations have been done on
> scenarios with mixed MP and non-MP routers, mobility such that basic
> TC_INTERVAL is appropriate but not overshort, and scenarios/density where
> there are MP routers not picked as MPRs? Because that=E2=80=99s the probl=
em case
> here.
>
>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
> *Sent:* 30 May 2016 22:25
> *To:* manet
> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> **** **WARNING ******
> EXTERNAL EMAIL -- This message originates from outside our organization.
>
>
>
> Hi all,
>
>
>
> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
> valuable comments from Chris -- thanks very much!
>
>
>
> Based on the comments received, a new revision will be submitted soon wit=
h
> following updates:
>
>
>
>    - Make the style more consistent with other OLSRv2-RFC suite.
>
>
>
>    - Make the reactive multipath calculation optional. Both proactive and
> reactive calculation can be used. Such modification won't impact
> interoperability.
>
>
>
>    - Clarify the use of SR_TC_INTERVAL.
>
>
>
>    - Clarify the generation/update of Multi-path routing Set (this is
> related to reactive/proactive calculation also)
>
>
>
>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>
>
>
>    - Chris raised the concern about impact partial topology map on
> multipath calculation. As indicated in
> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html , with
> non-trival amount of studies performed, no issue related to this has been
> reported yet. As it's related to the MPR-selection algorithm used, we can
> put it as one of the experimental points to make people pay attention to
> it, so that new issues can be reported.
>
>
>
> regards
>
>
>
> Jiazi
>
> ********************************************************************
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>
>
>

--001a113f18881c31550534658581
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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <span dir=
=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_bl=
ank">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is jus=
t to advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it shou=
ld advertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at=
 a slower rate, advertising any addresses either gets into the trap I descr=
ibed, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is =
something like (this is not actual suggested words) if SR_TC_INTERVAL is mu=
ch greater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mes=
sage SHOULD NOT report any addresses [unless the links are known to be exce=
ptionally stable] - the bit in [] could be included or excluded. It=E2=80=
=99s basically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local lin=
k information, supplied by neighbour, plus local knowledge. But that may be=
 too much detail to go into.</span></p></div></div></blockquote><div><br></=
div><div>Is it necessary to specify that the router &quot;SHOULD NOT report=
 addresses&quot; in this case? I think it will be an &quot;empty&quot; TC m=
essage anyways? Because if a router doesn&#39;t generate TC message with TC=
_INTERVAL, it generally means that there is no link to report.=C2=A0</div><=
div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p><span class=3D""=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" tar=
get=3D"_blank">+44 (0)1245 242194</a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10=
.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b=
><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&qu=
ot;,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=
=3D"_blank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail=
.com" target=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finis=
hed<u></u><u></u></span></p><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quo=
t;;color:black"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span><=
/b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
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<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u>=
</u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christophe=
r (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blan=
k">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find=
 my editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is genera=
lly as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures a=
ll of
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the lon=
ger SR_TC_INTERVAL doesn&#39;t imply that the related links have longer val=
idity time. All the MP-OLSR routers have to generate TC messages as require=
d by OLSR.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to =
advertise SOURCE_ROUTE TLV (so that the other routers can learn that the or=
iginators support source routing), in case they are not required to generat=
e TC messages.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers putt=
ing out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chose=
n by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in=
 a square, all sides are links, diagonals are not. Each will pick one neigh=
bour
 as an MPR. Each link will have a 1/2 chance of being advertised in each di=
rection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some=
 links having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short =
initial value or a short minimum interval.) If not, then consider a non-MP =
router. To it, those are just links like any other. And may have long valid=
ity time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done=
. But what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not overs=
hort, and scenarios/density where there are MP routers not picked as MPRs? =
Because that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)12=
45 242194</a>
 =C2=A0| =C2=A0<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:b=
lack">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt=
">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stro=
ng><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside ou=
r organization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>

--001a113f18881c31550534658581--


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From: Christopher Dearlove <christopher.dearlove@gmail.com>
Date: Fri, 3 Jun 2016 22:04:49 +0100
To: Jiazi YI <ietf@jiaziyi.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/manet/oYIQhq85JYbII3GBT6mhc9m3QzM>
Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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Here we're into the subtleties of advertised neighbours versus MPR selectors=
.

The point is to make sure people don't send rare TCs, then decide because th=
ey are sending them they might as well advertise some addresses (because tha=
t's allowed, see the point above). But those advertisements can be positivel=
y harmful.

-- =20
Christopher Dearlove
christopher.dearlove@gmail.com (iPhone)
chris@mnemosyne.demon.co.uk (home)

> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
>=20
>=20
>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <chris.dearlo=
ve@baesystems.com> wrote:
>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps so=
me guidance on what it should advertise as neighbours.
>>=20
>> =20
>>=20
>> I think if advertising at a slower rate, advertising any addresses either=
 gets into the trap I described, or alternatively advertised with a short va=
lidity time then those links will be transient, which is a bad idea.
>>=20
>> =20
>>=20
>> I think what you want is something like (this is not actual suggested wor=
ds) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will nitpick=
 over much greater, so perhaps in terms of the appropriate hold time) then t=
he TC message SHOULD NOT report any addresses [unless the links are known to=
 be exceptionally stable] - the bit in [] could be included or excluded. It=E2=
=80=99s basically an indication of when the SHOULD NOT can be broken sensibl=
y. Known to be stable can be taken from local link information, supplied by n=
eighbour, plus local knowledge. But that may be too much detail to go into.
>>=20
>=20
> Is it necessary to specify that the router "SHOULD NOT report addresses" i=
n this case? I think it will be an "empty" TC message anyways? Because if a r=
outer doesn't generate TC message with TC_INTERVAL, it generally means that t=
here is no link to report.=20
>=20
> Jiazi
> =20
>> =20
>>=20
>> --
>>=20
>> Christopher Dearlove
>> Senior Principal Engineer
>> BAE Systems Applied Intelligence Laboratories
>> _________________________________________________________________________=
_
>>=20
>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>=20
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddo=
w, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>=20
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>=20
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>=20
>> =20
>>=20
>> From: yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] On Behalf Of Jiazi Y=
I
>> Sent: 01 June 2016 21:59
>> To: Dearlove, Christopher (UK)
>> Cc: manet
>> Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>=20
>> =20
>>=20
>> =20
>>=20
>> *** WARNING ***
>>=20
>> This message originates from outside our organisation, either from an ext=
ernal partner or the internet.
>> Consider carefully whether you should click on any links, open any attach=
ments or reply.
>> For information regarding Red Flags that you can look out for in emails y=
ou receive, click here.
>> If you feel the email is suspicious, please follow this process.
>>=20
>> Hi Chris,=20
>>=20
>> =20
>>=20
>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <chris.dearlov=
e@baesystems.com> wrote:
>>=20
>> I will at some point find my editorial comments.
>>=20
>> =20
>>=20
>> Thanks very much.
>>=20
>>  =20
>>=20
>> =20
>>=20
>> While the below is generally as discussed, I don=E2=80=99t think the SR_T=
C_INTERVAL point captures all of  my concern.
>>=20
>> =20
>>=20
>> =20
>>=20
>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL do=
esn't imply that the related links have longer validity time. All the MP-OLS=
R routers have to generate TC messages as required by OLSR.=20
>>=20
>> =20
>>=20
>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_ROUT=
E TLV (so that the other routers can learn that the originators support sour=
ce routing), in case they are not required to generate TC messages.=20
>>=20
>> =20
>>=20
>> best
>>=20
>> =20
>>=20
>> Jiazi
>>=20
>> =20
>>=20
>> =20
>>=20
>> =20
>>=20
>> We have some routers putting out infrequent TCs. This must mean they have=
 long validity times. But there is nothing inherently different about those l=
inks, they can be chosen by pot luck.
>>=20
>> =20
>>=20
>> (Example, four routers in a square, all sides are links, diagonals are no=
t. Each will pick one neighbour as an MPR. Each link will have a 1/2 chance o=
f being advertised in each direction, all else being equal.)
>>=20
>> =20
>>=20
>> So why can we accept some links having long durations? If any link could,=
 then why not have a long TC_INTERVAL everywhere? (If worried about converge=
nce, set either a short initial value or a short minimum interval.) If not, t=
hen consider a non-MP router. To it, those are just links like any other. An=
d may have long validity time but short useful lifetime (that=E2=80=99s the s=
ituation we=E2=80=99ve reached here). Which is bad.
>>=20
>> =20
>>=20
>> You note simulations done. But what simulations have been done on scenari=
os with mixed MP and non-MP  routers, mobility such that basic TC_INTERVAL i=
s appropriate but not overshort, and scenarios/density where there are MP ro=
uters not picked as MPRs? Because that=E2=80=99s the problem case here.
>>=20
>> =20
>>=20
>> --
>>=20
>> Christopher Dearlove
>> Senior Principal Engineer
>> BAE Systems Applied Intelligence Laboratories
>> _________________________________________________________________________=
_
>>=20
>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>=20
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddo=
w, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>=20
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>=20
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>=20
>> =20
>>=20
>> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Jiazi YI
>> Sent: 30 May 2016 22:25
>> To: manet
>> Subject: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>=20
>> =20
>>=20
>> =20
>>=20
>> *** WARNING ***
>>=20
>> This message originates from outside our organisation, either from an ext=
ernal partner or the internet.
>> Consider carefully whether you should click on any links, open any attach=
ments or reply.
>> For information regarding Red Flags that you can look out for in emails y=
ou receive,  click here.
>> If you feel the email is suspicious, please follow this process.
>>=20
>> *** WARNING ***
>> EXTERNAL EMAIL -- This message originates from outside our organization.
>>=20
>> =20
>>=20
>> Hi all,=20
>>=20
>> =20
>>=20
>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got val=
uable comments from Chris -- thanks very much!
>>=20
>> =20
>>=20
>> Based on the comments received, a new revision will be submitted soon wit=
h following updates:
>>=20
>> =20
>>=20
>>    - Make the style more consistent with other OLSRv2-RFC suite.=20
>>=20
>> =20
>>=20
>>    - Make the reactive multipath calculation optional. Both proactive and=
 reactive calculation can be used. Such modification won't impact interopera=
bility.=20
>>=20
>> =20
>>=20
>>    - Clarify the use of SR_TC_INTERVAL.=20
>>=20
>> =20
>>=20
>>    - Clarify the generation/update of Multi-path routing Set (this is rel=
ated to reactive/proactive calculation also)
>>=20
>> =20
>>=20
>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>=20
>> =20
>>=20
>>    - Chris raised the concern about impact partial topology map on multip=
ath calculation. As indicated in https://www.ietf.org/mail-archive/web/manet=
/current/msg19038.html , with non-trival amount of studies performed, no iss=
ue related to this has been reported yet. As it's related to the MPR-selecti=
on algorithm used, we can put it as one of the experimental points to make p=
eople pay attention to it, so that new issues can be reported.=20
>>=20
>> =20
>>=20
>> regards
>>=20
>> =20
>>=20
>> Jiazi
>>=20
>> ********************************************************************
>> This email and any attachments are confidential to the intended
>> recipient and may also be privileged. If you are not the intended
>> recipient please delete it from your system and notify the sender.
>> You should not copy it or use it for any purpose nor disclose or
>> distribute its contents to any other person.
>> ********************************************************************
>>=20
>=20
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Here we're into the subtleties of adve=
rtised neighbours versus MPR selectors.</div><div id=3D"AppleMailSignature">=
<br></div><div id=3D"AppleMailSignature">The point is to make sure people do=
n't send rare TCs, then decide because they are sending them they might as w=
ell advertise some addresses (because that's allowed, see the point above). B=
ut those advertisements can be positively harmful.<br><br>-- &nbsp;<div>Chri=
stopher Dearlove</div><div><a href=3D"mailto:christopher.dearlove@gmail.com"=
>christopher.dearlove@gmail.com</a> (iPhone)</div><div><a href=3D"mailto:chr=
is@mnemosyne.demon.co.uk">chris@mnemosyne.demon.co.uk</a> (home)</div></div>=
<div><br>On 3 Jun 2016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziy=
i.com">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite=
"><div><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf=
-8"><div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_=
quote">On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <span dir=
=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_bla=
nk">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;paddi=
ng-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is just t=
o advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it should a=
dvertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at a=
 slower rate, advertising any addresses either gets into the trap I describe=
d, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is so=
mething like (this is not actual suggested words) if SR_TC_INTERVAL is much g=
reater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mess=
age SHOULD NOT report any addresses [unless the links are known to be except=
ionally stable] - the bit in [] could be included or excluded. It=E2=80=99s b=
asically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local link=
 information, supplied by neighbour, plus local knowledge. But that may be t=
oo much detail to go into.</span></p></div></div></blockquote><div><br></div=
><div>Is it necessary to specify that the router "SHOULD NOT report addresse=
s" in this case? I think it will be an "empty" TC message anyways? Because i=
f a router doesn't generate TC message with TC_INTERVAL, it generally means t=
hat there is no link to report.&nbsp;</div><div><br></div><div>Jiazi</div><d=
iv>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u=
></u><u></u></span></p><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" target=3D=
"_blank">+44 (0)1245 242194</a> &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris=
.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><=
u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><=
span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_b=
lank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail.com" t=
arget=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finish=
ed<u></u><u></u></span></p><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;=
;color:black"><u></u>&nbsp;<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&q=
uot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;font=
-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u></=
u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher=
 (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank"=
>chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find m=
y editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is generall=
y as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures all o=
f
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the long=
er SR_TC_INTERVAL doesn't imply that the related links have longer validity t=
ime. All the MP-OLSR routers have to generate TC messages as required by OLS=
R.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to a=
dvertise SOURCE_ROUTE TLV (so that the other routers can learn that the orig=
inators support source routing), in case they are not required to generate T=
C messages.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers puttin=
g out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chosen=
 by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in a=
 square, all sides are links, diagonals are not. Each will pick one neighbou=
r
 as an MPR. Each link will have a 1/2 chance of being advertised in each dir=
ection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some l=
inks having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short i=
nitial value or a short minimum interval.) If not, then consider a non-MP ro=
uter. To it, those are just links like any other. And may have long validity=
 time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done. B=
ut what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not oversh=
ort, and scenarios/density where there are MP routers not picked as MPRs? Be=
cause that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)1245 2=
42194</a>
 &nbsp;| &nbsp;<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" ta=
rget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><=
u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span la=
ng=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;=
sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished</=
span><u></u><u></u></p>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:bl=
ack">&nbsp;</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt"=
>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stron=
g><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:&=
quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fami=
ly:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside our o=
rganization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial&quo=
t;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has f=
inished. We got valuable comments from Chris -- thanks very much!<u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will b=
e submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the style more consistent with ot=
her OLSRv2-RFC suite.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the reactive multipath calculatio=
n optional. Both proactive and reactive calculation can be used. Such modifi=
cation won't impact interoperability.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of SR_TC_INTERVAL.&nbs=
p;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the generation/update of Multi=
-path routing Set (this is related to reactive/proactive calculation also)<u=
></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of fp and fe in the mu=
ltipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Chris raised the concern about impact p=
artial topology map on multipath calculation. As indicated in&nbsp;<a href=3D=
"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" target=3D=
"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038.html</=
a>
 , with non-trival amount of studies performed, no issue related to this has=
 been reported yet. As it's related to the MPR-selection algorithm used, we c=
an put it as one of the experimental points to make people pay attention to i=
t, so that new issues can be
 reported.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u><=
u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span>manet mailing list</span><br><sp=
an><a href=3D"mailto:manet@ietf.org">manet@ietf.org</a></span><br><span><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/manet">https://www.ietf.org/mai=
lman/listinfo/manet</a></span><br></div></blockquote></body></html>=

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From: Christopher Dearlove <christopher.dearlove@gmail.com>
Date: Sat, 4 Jun 2016 08:04:40 +0100
To: Jiazi YI <ietf@jiaziyi.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/manet/iJXPsIVEcCGgCDMcwDiWHahQsMw>
Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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Actually, as I should have thought earlier, what's the use of advertising ju=
st the source route TLV?

A router that doesn't advertise any neighbours in TC messages can't be an in=
termediate router on a route. (Exception for two hop routes constructed usin=
g HELLO messages, but those should only be transient.)

So what's the use case for this feature?

--=20
Christopher Dearlove

> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
>=20
>=20
>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <chris.dearlo=
ve@baesystems.com> wrote:
>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps so=
me guidance on what it should advertise as neighbours.
>>=20
>> =20
>>=20
>> I think if advertising at a slower rate, advertising any addresses either=
 gets into the trap I described, or alternatively advertised with a short va=
lidity time then those links will be transient, which is a bad idea.
>>=20
>> =20
>>=20
>> I think what you want is something like (this is not actual suggested wor=
ds) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will nitpick=
 over much greater, so perhaps in terms of the appropriate hold time) then t=
he TC message SHOULD NOT report any addresses [unless the links are known to=
 be exceptionally stable] - the bit in [] could be included or excluded. It=E2=
=80=99s basically an indication of when the SHOULD NOT can be broken sensibl=
y. Known to be stable can be taken from local link information, supplied by n=
eighbour, plus local knowledge. But that may be too much detail to go into.
>>=20
>=20
> Is it necessary to specify that the router "SHOULD NOT report addresses" i=
n this case? I think it will be an "empty" TC message anyways? Because if a r=
outer doesn't generate TC message with TC_INTERVAL, it generally means that t=
here is no link to report.=20
>=20
> Jiazi
> =20
>> =20
>>=20
>> --
>>=20
>> Christopher Dearlove
>> Senior Principal Engineer
>> BAE Systems Applied Intelligence Laboratories
>> _________________________________________________________________________=
_
>>=20
>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>=20
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddo=
w, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>=20
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>=20
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>=20
>> =20
>>=20
>> From: yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] On Behalf Of Jiazi Y=
I
>> Sent: 01 June 2016 21:59
>> To: Dearlove, Christopher (UK)
>> Cc: manet
>> Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>=20
>> =20
>>=20
>> =20
>>=20
>> *** WARNING ***
>>=20
>> This message originates from outside our organisation, either from an ext=
ernal partner or the internet.
>> Consider carefully whether you should click on any links, open any attach=
ments or reply.
>> For information regarding Red Flags that you can look out for in emails y=
ou receive, click here.
>> If you feel the email is suspicious, please follow this process.
>>=20
>> Hi Chris,=20
>>=20
>> =20
>>=20
>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <chris.dearlov=
e@baesystems.com> wrote:
>>=20
>> I will at some point find my editorial comments.
>>=20
>> =20
>>=20
>> Thanks very much.
>>=20
>>  =20
>>=20
>> =20
>>=20
>> While the below is generally as discussed, I don=E2=80=99t think the SR_T=
C_INTERVAL point captures all of  my concern.
>>=20
>> =20
>>=20
>> =20
>>=20
>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL do=
esn't imply that the related links have longer validity time. All the MP-OLS=
R routers have to generate TC messages as required by OLSR.=20
>>=20
>> =20
>>=20
>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_ROUT=
E TLV (so that the other routers can learn that the originators support sour=
ce routing), in case they are not required to generate TC messages.=20
>>=20
>> =20
>>=20
>> best
>>=20
>> =20
>>=20
>> Jiazi
>>=20
>> =20
>>=20
>> =20
>>=20
>> =20
>>=20
>> We have some routers putting out infrequent TCs. This must mean they have=
 long validity times. But there is nothing inherently different about those l=
inks, they can be chosen by pot luck.
>>=20
>> =20
>>=20
>> (Example, four routers in a square, all sides are links, diagonals are no=
t. Each will pick one neighbour as an MPR. Each link will have a 1/2 chance o=
f being advertised in each direction, all else being equal.)
>>=20
>> =20
>>=20
>> So why can we accept some links having long durations? If any link could,=
 then why not have a long TC_INTERVAL everywhere? (If worried about converge=
nce, set either a short initial value or a short minimum interval.) If not, t=
hen consider a non-MP router. To it, those are just links like any other. An=
d may have long validity time but short useful lifetime (that=E2=80=99s the s=
ituation we=E2=80=99ve reached here). Which is bad.
>>=20
>> =20
>>=20
>> You note simulations done. But what simulations have been done on scenari=
os with mixed MP and non-MP  routers, mobility such that basic TC_INTERVAL i=
s appropriate but not overshort, and scenarios/density where there are MP ro=
uters not picked as MPRs? Because that=E2=80=99s the problem case here.
>>=20
>> =20
>>=20
>> --
>>=20
>> Christopher Dearlove
>> Senior Principal Engineer
>> BAE Systems Applied Intelligence Laboratories
>> _________________________________________________________________________=
_
>>=20
>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>=20
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddo=
w, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>=20
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>=20
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>=20
>> =20
>>=20
>> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Jiazi YI
>> Sent: 30 May 2016 22:25
>> To: manet
>> Subject: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>=20
>> =20
>>=20
>> =20
>>=20
>> *** WARNING ***
>>=20
>> This message originates from outside our organisation, either from an ext=
ernal partner or the internet.
>> Consider carefully whether you should click on any links, open any attach=
ments or reply.
>> For information regarding Red Flags that you can look out for in emails y=
ou receive,  click here.
>> If you feel the email is suspicious, please follow this process.
>>=20
>> *** WARNING ***
>> EXTERNAL EMAIL -- This message originates from outside our organization.
>>=20
>> =20
>>=20
>> Hi all,=20
>>=20
>> =20
>>=20
>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got val=
uable comments from Chris -- thanks very much!
>>=20
>> =20
>>=20
>> Based on the comments received, a new revision will be submitted soon wit=
h following updates:
>>=20
>> =20
>>=20
>>    - Make the style more consistent with other OLSRv2-RFC suite.=20
>>=20
>> =20
>>=20
>>    - Make the reactive multipath calculation optional. Both proactive and=
 reactive calculation can be used. Such modification won't impact interopera=
bility.=20
>>=20
>> =20
>>=20
>>    - Clarify the use of SR_TC_INTERVAL.=20
>>=20
>> =20
>>=20
>>    - Clarify the generation/update of Multi-path routing Set (this is rel=
ated to reactive/proactive calculation also)
>>=20
>> =20
>>=20
>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>=20
>> =20
>>=20
>>    - Chris raised the concern about impact partial topology map on multip=
ath calculation. As indicated in https://www.ietf.org/mail-archive/web/manet=
/current/msg19038.html , with non-trival amount of studies performed, no iss=
ue related to this has been reported yet. As it's related to the MPR-selecti=
on algorithm used, we can put it as one of the experimental points to make p=
eople pay attention to it, so that new issues can be reported.=20
>>=20
>> =20
>>=20
>> regards
>>=20
>> =20
>>=20
>> Jiazi
>>=20
>> ********************************************************************
>> This email and any attachments are confidential to the intended
>> recipient and may also be privileged. If you are not the intended
>> recipient please delete it from your system and notify the sender.
>> You should not copy it or use it for any purpose nor disclose or
>> distribute its contents to any other person.
>> ********************************************************************
>>=20
>=20
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Actually, as I should have thought ear=
lier, what's the use of advertising just the source route TLV?</div><div id=3D=
"AppleMailSignature"><br></div><div id=3D"AppleMailSignature">A router that d=
oesn't advertise any neighbours in TC messages can't be an intermediate rout=
er on a route. (Exception for two hop routes constructed using HELLO message=
s, but those should only be transient.)</div><div id=3D"AppleMailSignature">=
<br></div><div id=3D"AppleMailSignature">So what's the use case for this fea=
ture?<br><br>--&nbsp;<div>Christopher Dearlove</div></div><div><br>On 3 Jun 2=
016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com">ietf@jiaziyi=
.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><div><div dir=3D"=
ltr"><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, J=
un 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris.dearlov=
e@baesystems.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is just t=
o advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it should a=
dvertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at a=
 slower rate, advertising any addresses either gets into the trap I describe=
d, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is so=
mething like (this is not actual suggested words) if SR_TC_INTERVAL is much g=
reater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mess=
age SHOULD NOT report any addresses [unless the links are known to be except=
ionally stable] - the bit in [] could be included or excluded. It=E2=80=99s b=
asically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local link=
 information, supplied by neighbour, plus local knowledge. But that may be t=
oo much detail to go into.</span></p></div></div></blockquote><div><br></div=
><div>Is it necessary to specify that the router "SHOULD NOT report addresse=
s" in this case? I think it will be an "empty" TC message anyways? Because i=
f a router doesn't generate TC message with TC_INTERVAL, it generally means t=
hat there is no link to report.&nbsp;</div><div><br></div><div>Jiazi</div><d=
iv>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u=
></u><u></u></span></p><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" target=3D=
"_blank">+44 (0)1245 242194</a> &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris=
.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><=
u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><=
span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_b=
lank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail.com" t=
arget=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finish=
ed<u></u><u></u></span></p><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;=
;color:black"><u></u>&nbsp;<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&q=
uot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;font=
-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u></=
u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher=
 (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank"=
>chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find m=
y editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is generall=
y as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures all o=
f
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the long=
er SR_TC_INTERVAL doesn't imply that the related links have longer validity t=
ime. All the MP-OLSR routers have to generate TC messages as required by OLS=
R.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to a=
dvertise SOURCE_ROUTE TLV (so that the other routers can learn that the orig=
inators support source routing), in case they are not required to generate T=
C messages.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers puttin=
g out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chosen=
 by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in a=
 square, all sides are links, diagonals are not. Each will pick one neighbou=
r
 as an MPR. Each link will have a 1/2 chance of being advertised in each dir=
ection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some l=
inks having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short i=
nitial value or a short minimum interval.) If not, then consider a non-MP ro=
uter. To it, those are just links like any other. And may have long validity=
 time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done. B=
ut what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not oversh=
ort, and scenarios/density where there are MP routers not picked as MPRs? Be=
cause that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)1245 2=
42194</a>
 &nbsp;| &nbsp;<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" ta=
rget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><=
u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span la=
ng=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;=
sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished</=
span><u></u><u></u></p>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:bl=
ack">&nbsp;</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt"=
>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stron=
g><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:&=
quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fami=
ly:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside our o=
rganization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial&quo=
t;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has f=
inished. We got valuable comments from Chris -- thanks very much!<u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will b=
e submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the style more consistent with ot=
her OLSRv2-RFC suite.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the reactive multipath calculatio=
n optional. Both proactive and reactive calculation can be used. Such modifi=
cation won't impact interoperability.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of SR_TC_INTERVAL.&nbs=
p;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the generation/update of Multi=
-path routing Set (this is related to reactive/proactive calculation also)<u=
></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of fp and fe in the mu=
ltipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Chris raised the concern about impact p=
artial topology map on multipath calculation. As indicated in&nbsp;<a href=3D=
"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" target=3D=
"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038.html</=
a>
 , with non-trival amount of studies performed, no issue related to this has=
 been reported yet. As it's related to the MPR-selection algorithm used, we c=
an put it as one of the experimental points to make people pay attention to i=
t, so that new issues can be
 reported.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u><=
u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span>manet mailing list</span><br><sp=
an><a href=3D"mailto:manet@ietf.org">manet@ietf.org</a></span><br><span><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/manet">https://www.ietf.org/mai=
lman/listinfo/manet</a></span><br></div></blockquote></body></html>=

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From: Jiazi YI <ietf@jiaziyi.com>
Date: Sat, 4 Jun 2016 22:15:12 +0200
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Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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As long as a router has more than two neighbors in the "topology graph"
constructed, it can be an intermediate router on a route, right?

An MP-OLSR router that doesn't advertise any neighbors in its own TC
message will be advertised in other router's (or routers') TC messages.
Of course, the router receiving such TC messages won't be able to know the
neighbors are MP-OLSR enabled or not.
Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can
provide such information.

Other than being intermediate routers, it's important to know a destination
is MP-OLSR enabled, if we want to use multi-path routing to such
destination.

best

Jiazi

On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <
christopher.dearlove@gmail.com> wrote:

> Actually, as I should have thought earlier, what's the use of advertising
> just the source route TLV?
>
> A router that doesn't advertise any neighbours in TC messages can't be an
> intermediate router on a route. (Exception for two hop routes constructed
> using HELLO messages, but those should only be transient.)
>
> So what's the use case for this feature?
>
> --
> Christopher Dearlove
>
> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>
>
>
> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <
> chris.dearlove@baesystems.com> wrote:
>
>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps
>> some guidance on what it should advertise as neighbours.
>>
>>
>>
>> I think if advertising at a slower rate, advertising any addresses eithe=
r
>> gets into the trap I described, or alternatively advertised with a short
>> validity time then those links will be transient, which is a bad idea.
>>
>>
>>
>> I think what you want is something like (this is not actual suggested
>> words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will
>> nitpick over much greater, so perhaps in terms of the appropriate hold
>> time) then the TC message SHOULD NOT report any addresses [unless the li=
nks
>> are known to be exceptionally stable] - the bit in [] could be included =
or
>> excluded. It=E2=80=99s basically an indication of when the SHOULD NOT ca=
n be broken
>> sensibly. Known to be stable can be taken from local link information,
>> supplied by neighbour, plus local knowledge. But that may be too much
>> detail to go into.
>>
>
> Is it necessary to specify that the router "SHOULD NOT report addresses"
> in this case? I think it will be an "empty" TC message anyways? Because i=
f
> a router doesn't generate TC message with TC_INTERVAL, it generally means
> that there is no link to report.
>
> Jiazi
>
>
>>
>>
>> *-- *
>>
>>
>>
>>
>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>> Intelligence Laboratories *
>> *_______________________________________________________________________=
___
>> *
>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>> Baddow, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>
>>
>>
>> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] *On Behalf Of *Ji=
azi
>> YI
>> *Sent:* 01 June 2016 21:59
>> *To:* Dearlove, Christopher (UK)
>> *Cc:* manet
>> *Subject:* Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finishe=
d
>>
>>
>>
>>
>>
>> **** WARNING ****
>>
>> *This message originates from outside our organisation, either from an
>> external partner or the internet.*
>>
>> * Consider carefully whether you should click on any links, open any
>> attachments or reply. For information regarding **Red Flags** that you
>> can look out for in emails you receive, click here
>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docume=
nts/Red%20Flags.pdf>.*
>> * If you feel the email is suspicious, please follow this process
>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docume=
nts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>
>> Hi Chris,
>>
>>
>>
>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
>> chris.dearlove@baesystems.com> wrote:
>>
>> I will at some point find my editorial comments.
>>
>>
>>
>> Thanks very much.
>>
>>
>>
>>
>>
>> While the below is generally as discussed, I don=E2=80=99t think the
>> SR_TC_INTERVAL point captures all of my concern.
>>
>>
>>
>>
>>
>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL
>> doesn't imply that the related links have longer validity time. All the
>> MP-OLSR routers have to generate TC messages as required by OLSR.
>>
>>
>>
>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise
>> SOURCE_ROUTE TLV (so that the other routers can learn that the originato=
rs
>> support source routing), in case they are not required to generate TC
>> messages.
>>
>>
>>
>> best
>>
>>
>>
>> Jiazi
>>
>>
>>
>>
>>
>>
>>
>> We have some routers putting out infrequent TCs. This must mean they hav=
e
>> long validity times. But there is nothing inherently different about tho=
se
>> links, they can be chosen by pot luck.
>>
>>
>>
>> (Example, four routers in a square, all sides are links, diagonals are
>> not. Each will pick one neighbour as an MPR. Each link will have a 1/2
>> chance of being advertised in each direction, all else being equal.)
>>
>>
>>
>> So why can we accept some links having long durations? If any link could=
,
>> then why not have a long TC_INTERVAL everywhere? (If worried about
>> convergence, set either a short initial value or a short minimum interva=
l.)
>> If not, then consider a non-MP router. To it, those are just links like =
any
>> other. And may have long validity time but short useful lifetime (that=
=E2=80=99s
>> the situation we=E2=80=99ve reached here). Which is bad.
>>
>>
>>
>> You note simulations done. But what simulations have been done on
>> scenarios with mixed MP and non-MP routers, mobility such that basic
>> TC_INTERVAL is appropriate but not overshort, and scenarios/density wher=
e
>> there are MP routers not picked as MPRs? Because that=E2=80=99s the prob=
lem case
>> here.
>>
>>
>>
>> *-- *
>>
>>
>>
>>
>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>> Intelligence Laboratories *
>> *_______________________________________________________________________=
___
>> *
>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>
>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>> Baddow, Chelmsford, Essex CM2 8HN.
>> www.baesystems.com/ai
>>
>> BAE Systems Applied Intelligence Limited
>> Registered in England & Wales No: 01337451
>>
>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>
>>
>>
>> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
>> *Sent:* 30 May 2016 22:25
>> *To:* manet
>> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>
>>
>>
>>
>>
>> **** WARNING ****
>>
>> *This message originates from outside our organisation, either from an
>> external partner or the internet.*
>>
>> * Consider carefully whether you should click on any links, open any
>> attachments or reply. For information regarding **Red Flags** that you
>> can look out for in emails you receive, click here
>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docume=
nts/Red%20Flags.pdf>.*
>> * If you feel the email is suspicious, please follow this process
>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docume=
nts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>
>> **** **WARNING ******
>> EXTERNAL EMAIL -- This message originates from outside our organization.
>>
>>
>>
>> Hi all,
>>
>>
>>
>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
>> valuable comments from Chris -- thanks very much!
>>
>>
>>
>> Based on the comments received, a new revision will be submitted soon
>> with following updates:
>>
>>
>>
>>    - Make the style more consistent with other OLSRv2-RFC suite.
>>
>>
>>
>>    - Make the reactive multipath calculation optional. Both proactive an=
d
>> reactive calculation can be used. Such modification won't impact
>> interoperability.
>>
>>
>>
>>    - Clarify the use of SR_TC_INTERVAL.
>>
>>
>>
>>    - Clarify the generation/update of Multi-path routing Set (this is
>> related to reactive/proactive calculation also)
>>
>>
>>
>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>
>>
>>
>>    - Chris raised the concern about impact partial topology map on
>> multipath calculation. As indicated in
>> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html , with
>> non-trival amount of studies performed, no issue related to this has bee=
n
>> reported yet. As it's related to the MPR-selection algorithm used, we ca=
n
>> put it as one of the experimental points to make people pay attention to
>> it, so that new issues can be reported.
>>
>>
>>
>> regards
>>
>>
>>
>> Jiazi
>>
>> ********************************************************************
>> This email and any attachments are confidential to the intended
>> recipient and may also be privileged. If you are not the intended
>> recipient please delete it from your system and notify the sender.
>> You should not copy it or use it for any purpose nor disclose or
>> distribute its contents to any other person.
>> ********************************************************************
>>
>>
>>
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>
>

--001a114082203b7f830534797fbb
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">As long as a router has more than two neighbors in the &qu=
ot;topology graph&quot; constructed, it can be an intermediate router on a =
route, right?<div><br></div><div>An MP-OLSR router that doesn&#39;t adverti=
se any neighbors in its own TC message will be advertised in other router&#=
39;s (or routers&#39;) TC messages.=C2=A0</div><div>Of course, the router r=
eceiving such TC messages won&#39;t be able to know the neighbors are MP-OL=
SR enabled or not.=C2=A0</div><div>Having the MP-OLSR originating TC messag=
e carrying the SRC_ROUTE TLV can provide such information.=C2=A0</div><div>=
<br></div><div>Other than being intermediate routers, it&#39;s important to=
 know a destination is MP-OLSR enabled, if we want to use multi-path routin=
g to such destination.=C2=A0</div><div><br></div><div>best</div><div><br></=
div><div>Jiazi=C2=A0</div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:christopher.dearlove@gmail.com" target=
=3D"_blank">christopher.dearlove@gmail.com</a>&gt;</span> wrote:<br><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div dir=3D"auto"><div>Actually, as I should have t=
hought earlier, what&#39;s the use of advertising just the source route TLV=
?</div><div><br></div><div>A router that doesn&#39;t advertise any neighbou=
rs in TC messages can&#39;t be an intermediate router on a route. (Exceptio=
n for two hop routes constructed using HELLO messages, but those should onl=
y be transient.)</div><div><br></div><div>So what&#39;s the use case for th=
is feature?<span class=3D"HOEnZb"><font color=3D"#888888"><br><br>--=C2=A0<=
div>Christopher Dearlove</div></font></span></div><span class=3D""><div><br=
>On 3 Jun 2016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" =
target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div></span><div>=
<div class=3D"h5"><blockquote type=3D"cite"><div><div dir=3D"ltr"><br><div =
class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jun 2, 2016 at=
 10:45 AM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a href=3D"mail=
to:chris.dearlove@baesystems.com" target=3D"_blank">chris.dearlove@baesyste=
ms.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is jus=
t to advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it shou=
ld advertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at=
 a slower rate, advertising any addresses either gets into the trap I descr=
ibed, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is =
something like (this is not actual suggested words) if SR_TC_INTERVAL is mu=
ch greater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mes=
sage SHOULD NOT report any addresses [unless the links are known to be exce=
ptionally stable] - the bit in [] could be included or excluded. It=E2=80=
=99s basically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local lin=
k information, supplied by neighbour, plus local knowledge. But that may be=
 too much detail to go into.</span></p></div></div></blockquote><div><br></=
div><div>Is it necessary to specify that the router &quot;SHOULD NOT report=
 addresses&quot; in this case? I think it will be an &quot;empty&quot; TC m=
essage anyways? Because if a router doesn&#39;t generate TC message with TC=
_INTERVAL, it generally means that there is no link to report.=C2=A0</div><=
div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" tar=
get=3D"_blank">+44 (0)1245 242194</a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10=
.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b=
><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&qu=
ot;,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=
=3D"_blank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail=
.com" target=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finis=
hed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quo=
t;;color:black"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span><=
/b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u>=
</u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christophe=
r (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blan=
k">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find=
 my editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is genera=
lly as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures a=
ll of
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the lon=
ger SR_TC_INTERVAL doesn&#39;t imply that the related links have longer val=
idity time. All the MP-OLSR routers have to generate TC messages as require=
d by OLSR.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to =
advertise SOURCE_ROUTE TLV (so that the other routers can learn that the or=
iginators support source routing), in case they are not required to generat=
e TC messages.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers putt=
ing out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chose=
n by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in=
 a square, all sides are links, diagonals are not. Each will pick one neigh=
bour
 as an MPR. Each link will have a 1/2 chance of being advertised in each di=
rection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some=
 links having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short =
initial value or a short minimum interval.) If not, then consider a non-MP =
router. To it, those are just links like any other. And may have long valid=
ity time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done=
. But what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not overs=
hort, and scenarios/density where there are MP routers not picked as MPRs? =
Because that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)12=
45 242194</a>
 =C2=A0| =C2=A0<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:b=
lack">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt=
">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stro=
ng><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside ou=
r organization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span class=3D""><blockquote type=3D"cite"><=
div><span>_______________________________________________</span><br><span>m=
anet mailing list</span><br><span><a href=3D"mailto:manet@ietf.org" target=
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From: Jiazi YI <ietf@jiaziyi.com>
Date: Sun, 5 Jun 2016 00:39:42 +0200
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Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, Christopher Dearlove <christopher.dearlove@gmail.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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On Sun, Jun 5, 2016 at 12:23 AM, Christopher Dearlove <
chris@mnemosyne.demon.co.uk> wrote:

> Being advertised in other routers' messages doesn't help - you need to
> look at the directionality of the links, links in TC messages are outgoin=
g,
> not incoming.
>
> If you need to know destinations are MP that's another matter. But why?
> All a destination needs to do is receive packets.
>

There is a source routing header in the packets, the destination needs to
know how to deal with it. Or else, the behaviour would be unpredictable.


>
> However suppose that it is needed, no need to advertise other addresses.
> Which is back at the point I was making about not advertising other
> addresses. Not needed, even harmful, in the cases I indicated.
>

I would agree with not advertising other addresses.

Jiazi


>
>
> --
> Christopher Dearlove
>
> On 4 Jun 2016, at 21:15, Jiazi YI <ietf@jiaziyi.com> wrote:
>
> As long as a router has more than two neighbors in the "topology graph"
> constructed, it can be an intermediate router on a route, right?
>
> An MP-OLSR router that doesn't advertise any neighbors in its own TC
> message will be advertised in other router's (or routers') TC messages.
> Of course, the router receiving such TC messages won't be able to know th=
e
> neighbors are MP-OLSR enabled or not.
> Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can
> provide such information.
>
> Other than being intermediate routers, it's important to know a
> destination is MP-OLSR enabled, if we want to use multi-path routing to
> such destination.
>
> best
>
> Jiazi
>
> On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <
> christopher.dearlove@gmail.com> wrote:
>
>> Actually, as I should have thought earlier, what's the use of advertisin=
g
>> just the source route TLV?
>>
>> A router that doesn't advertise any neighbours in TC messages can't be a=
n
>> intermediate router on a route. (Exception for two hop routes constructe=
d
>> using HELLO messages, but those should only be transient.)
>>
>> So what's the use case for this feature?
>>
>> --
>> Christopher Dearlove
>>
>> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>>
>>
>>
>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <
>> chris.dearlove@baesystems.com> wrote:
>>
>>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps
>>> some guidance on what it should advertise as neighbours.
>>>
>>>
>>>
>>> I think if advertising at a slower rate, advertising any addresses
>>> either gets into the trap I described, or alternatively advertised with=
 a
>>> short validity time then those links will be transient, which is a bad =
idea.
>>>
>>>
>>>
>>> I think what you want is something like (this is not actual suggested
>>> words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will
>>> nitpick over much greater, so perhaps in terms of the appropriate hold
>>> time) then the TC message SHOULD NOT report any addresses [unless the l=
inks
>>> are known to be exceptionally stable] - the bit in [] could be included=
 or
>>> excluded. It=E2=80=99s basically an indication of when the SHOULD NOT c=
an be broken
>>> sensibly. Known to be stable can be taken from local link information,
>>> supplied by neighbour, plus local knowledge. But that may be too much
>>> detail to go into.
>>>
>>
>> Is it necessary to specify that the router "SHOULD NOT report addresses"
>> in this case? I think it will be an "empty" TC message anyways? Because =
if
>> a router doesn't generate TC message with TC_INTERVAL, it generally mean=
s
>> that there is no link to report.
>>
>> Jiazi
>>
>>
>>>
>>>
>>> *-- *
>>>
>>>
>>>
>>>
>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>> Intelligence Laboratories *
>>> *______________________________________________________________________=
____
>>> *
>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>
>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>> Baddow, Chelmsford, Essex CM2 8HN.
>>> www.baesystems.com/ai
>>>
>>> BAE Systems Applied Intelligence Limited
>>> Registered in England & Wales No: 01337451
>>>
>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>
>>>
>>>
>>> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] *On Behalf Of *J=
iazi
>>> YI
>>> *Sent:* 01 June 2016 21:59
>>> *To:* Dearlove, Christopher (UK)
>>> *Cc:* manet
>>> *Subject:* Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC
>>> finished
>>>
>>>
>>>
>>>
>>>
>>> **** WARNING ****
>>>
>>> *This message originates from outside our organisation, either from an
>>> external partner or the internet.*
>>>
>>> * Consider carefully whether you should click on any links, open any
>>> attachments or reply. For information regarding **Red Flags** that you
>>> can look out for in emails you receive, click here
>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docum=
ents/Red%20Flags.pdf>.*
>>> * If you feel the email is suspicious, please follow this process
>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docum=
ents/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>
>>> Hi Chris,
>>>
>>>
>>>
>>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
>>> chris.dearlove@baesystems.com> wrote:
>>>
>>> I will at some point find my editorial comments.
>>>
>>>
>>>
>>> Thanks very much.
>>>
>>>
>>>
>>>
>>>
>>> While the below is generally as discussed, I don=E2=80=99t think the
>>> SR_TC_INTERVAL point captures all of my concern.
>>>
>>>
>>>
>>>
>>>
>>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL
>>> doesn't imply that the related links have longer validity time. All the
>>> MP-OLSR routers have to generate TC messages as required by OLSR.
>>>
>>>
>>>
>>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise
>>> SOURCE_ROUTE TLV (so that the other routers can learn that the originat=
ors
>>> support source routing), in case they are not required to generate TC
>>> messages.
>>>
>>>
>>>
>>> best
>>>
>>>
>>>
>>> Jiazi
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> We have some routers putting out infrequent TCs. This must mean they
>>> have long validity times. But there is nothing inherently different abo=
ut
>>> those links, they can be chosen by pot luck.
>>>
>>>
>>>
>>> (Example, four routers in a square, all sides are links, diagonals are
>>> not. Each will pick one neighbour as an MPR. Each link will have a 1/2
>>> chance of being advertised in each direction, all else being equal.)
>>>
>>>
>>>
>>> So why can we accept some links having long durations? If any link
>>> could, then why not have a long TC_INTERVAL everywhere? (If worried abo=
ut
>>> convergence, set either a short initial value or a short minimum interv=
al.)
>>> If not, then consider a non-MP router. To it, those are just links like=
 any
>>> other. And may have long validity time but short useful lifetime (that=
=E2=80=99s
>>> the situation we=E2=80=99ve reached here). Which is bad.
>>>
>>>
>>>
>>> You note simulations done. But what simulations have been done on
>>> scenarios with mixed MP and non-MP routers, mobility such that basic
>>> TC_INTERVAL is appropriate but not overshort, and scenarios/density whe=
re
>>> there are MP routers not picked as MPRs? Because that=E2=80=99s the pro=
blem case
>>> here.
>>>
>>>
>>>
>>> *-- *
>>>
>>>
>>>
>>>
>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>> Intelligence Laboratories *
>>> *______________________________________________________________________=
____
>>> *
>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>
>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>> Baddow, Chelmsford, Essex CM2 8HN.
>>> www.baesystems.com/ai
>>>
>>> BAE Systems Applied Intelligence Limited
>>> Registered in England & Wales No: 01337451
>>>
>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>
>>>
>>>
>>> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
>>> *Sent:* 30 May 2016 22:25
>>> *To:* manet
>>> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>>
>>>
>>>
>>>
>>>
>>> **** WARNING ****
>>>
>>> *This message originates from outside our organisation, either from an
>>> external partner or the internet.*
>>>
>>> * Consider carefully whether you should click on any links, open any
>>> attachments or reply. For information regarding **Red Flags** that you
>>> can look out for in emails you receive, click here
>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docum=
ents/Red%20Flags.pdf>.*
>>> * If you feel the email is suspicious, please follow this process
>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docum=
ents/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>
>>> **** **WARNING ******
>>> EXTERNAL EMAIL -- This message originates from outside our organization=
.
>>>
>>>
>>>
>>> Hi all,
>>>
>>>
>>>
>>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
>>> valuable comments from Chris -- thanks very much!
>>>
>>>
>>>
>>> Based on the comments received, a new revision will be submitted soon
>>> with following updates:
>>>
>>>
>>>
>>>    - Make the style more consistent with other OLSRv2-RFC suite.
>>>
>>>
>>>
>>>    - Make the reactive multipath calculation optional. Both proactive
>>> and reactive calculation can be used. Such modification won't impact
>>> interoperability.
>>>
>>>
>>>
>>>    - Clarify the use of SR_TC_INTERVAL.
>>>
>>>
>>>
>>>    - Clarify the generation/update of Multi-path routing Set (this is
>>> related to reactive/proactive calculation also)
>>>
>>>
>>>
>>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>>
>>>
>>>
>>>    - Chris raised the concern about impact partial topology map on
>>> multipath calculation. As indicated in
>>> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html ,
>>> with non-trival amount of studies performed, no issue related to this h=
as
>>> been reported yet. As it's related to the MPR-selection algorithm used,=
 we
>>> can put it as one of the experimental points to make people pay attenti=
on
>>> to it, so that new issues can be reported.
>>>
>>>
>>>
>>> regards
>>>
>>>
>>>
>>> Jiazi
>>>
>>> ********************************************************************
>>> This email and any attachments are confidential to the intended
>>> recipient and may also be privileged. If you are not the intended
>>> recipient please delete it from your system and notify the sender.
>>> You should not copy it or use it for any purpose nor disclose or
>>> distribute its contents to any other person.
>>> ********************************************************************
>>>
>>>
>>>
>>
>> _______________________________________________
>> manet mailing list
>> manet@ietf.org
>> https://www.ietf.org/mailman/listinfo/manet
>>
>>
>

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<div dir=3D"ltr"><div><br></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Sun, Jun 5, 2016 at 12:23 AM, Christopher Dearlove <spa=
n dir=3D"ltr">&lt;<a href=3D"mailto:chris@mnemosyne.demon.co.uk" target=3D"=
_blank">chris@mnemosyne.demon.co.uk</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex"><div dir=3D"auto"><div>Being advertised in other routers&#=
39; messages doesn&#39;t help - you need to look at the directionality of t=
he links, links in TC messages are outgoing, not incoming.</div><div><br></=
div><div>If you need to know destinations are MP that&#39;s another matter.=
 But why? All a destination needs to do is receive packets.</div></div></bl=
ockquote><div><br></div><div>There is a source routing header in the packet=
s, the destination needs to know how to deal with it. Or else, the behaviou=
r would be unpredictable.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex"><div dir=3D"auto"><div><br></div><div>However suppose that it is =
needed, no need to advertise other addresses. Which is back at the point I =
was making about not advertising other addresses. Not needed, even harmful,=
 in the cases I indicated.</div></div></blockquote><div><br></div><div>I wo=
uld agree with not advertising other addresses.=C2=A0</div><div><br></div><=
div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"=
auto"><div><span class=3D"HOEnZb"><font color=3D"#888888"><br><br>--=C2=A0<=
div>Christopher Dearlove</div></font></span></div><div><div class=3D"h5"><d=
iv><br>On 4 Jun 2016, at 21:15, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi=
.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><block=
quote type=3D"cite"><div><div dir=3D"ltr">As long as a router has more than=
 two neighbors in the &quot;topology graph&quot; constructed, it can be an =
intermediate router on a route, right?<div><br></div><div>An MP-OLSR router=
 that doesn&#39;t advertise any neighbors in its own TC message will be adv=
ertised in other router&#39;s (or routers&#39;) TC messages.=C2=A0</div><di=
v>Of course, the router receiving such TC messages won&#39;t be able to kno=
w the neighbors are MP-OLSR enabled or not.=C2=A0</div><div>Having the MP-O=
LSR originating TC message carrying the SRC_ROUTE TLV can provide such info=
rmation.=C2=A0</div><div><br></div><div>Other than being intermediate route=
rs, it&#39;s important to know a destination is MP-OLSR enabled, if we want=
 to use multi-path routing to such destination.=C2=A0</div><div><br></div><=
div>best</div><div><br></div><div>Jiazi=C2=A0</div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Sat, Jun 4, 2016 at 9:04 AM, Chr=
istopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:christopher.dearl=
ove@gmail.com" target=3D"_blank">christopher.dearlove@gmail.com</a>&gt;</sp=
an> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div>Actuall=
y, as I should have thought earlier, what&#39;s the use of advertising just=
 the source route TLV?</div><div><br></div><div>A router that doesn&#39;t a=
dvertise any neighbours in TC messages can&#39;t be an intermediate router =
on a route. (Exception for two hop routes constructed using HELLO messages,=
 but those should only be transient.)</div><div><br></div><div>So what&#39;=
s the use case for this feature?<span><font color=3D"#888888"><br><br>--=C2=
=A0<div>Christopher Dearlove</div></font></span></div><span><div><br>On 3 J=
un 2016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" target=
=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div></span><div><div><=
blockquote type=3D"cite"><div><div dir=3D"ltr"><br><div class=3D"gmail_extr=
a"><br><div class=3D"gmail_quote">On Thu, Jun 2, 2016 at 10:45 AM, Dearlove=
, Christopher (UK) <span dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@b=
aesystems.com" target=3D"_blank">chris.dearlove@baesystems.com</a>&gt;</spa=
n> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is jus=
t to advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it shou=
ld advertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at=
 a slower rate, advertising any addresses either gets into the trap I descr=
ibed, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is =
something like (this is not actual suggested words) if SR_TC_INTERVAL is mu=
ch greater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mes=
sage SHOULD NOT report any addresses [unless the links are known to be exce=
ptionally stable] - the bit in [] could be included or excluded. It=E2=80=
=99s basically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local lin=
k information, supplied by neighbour, plus local knowledge. But that may be=
 too much detail to go into.</span></p></div></div></blockquote><div><br></=
div><div>Is it necessary to specify that the router &quot;SHOULD NOT report=
 addresses&quot; in this case? I think it will be an &quot;empty&quot; TC m=
essage anyways? Because if a router doesn&#39;t generate TC message with TC=
_INTERVAL, it generally means that there is no link to report.=C2=A0</div><=
div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" tar=
get=3D"_blank">+44 (0)1245 242194</a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10=
.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b=
><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&qu=
ot;,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=
=3D"_blank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail=
.com" target=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finis=
hed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quo=
t;;color:black"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span><=
/b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u>=
</u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christophe=
r (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blan=
k">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find=
 my editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is genera=
lly as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures a=
ll of
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the lon=
ger SR_TC_INTERVAL doesn&#39;t imply that the related links have longer val=
idity time. All the MP-OLSR routers have to generate TC messages as require=
d by OLSR.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to =
advertise SOURCE_ROUTE TLV (so that the other routers can learn that the or=
iginators support source routing), in case they are not required to generat=
e TC messages.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers putt=
ing out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chose=
n by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in=
 a square, all sides are links, diagonals are not. Each will pick one neigh=
bour
 as an MPR. Each link will have a 1/2 chance of being advertised in each di=
rection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some=
 links having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short =
initial value or a short minimum interval.) If not, then consider a non-MP =
router. To it, those are just links like any other. And may have long valid=
ity time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done=
. But what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not overs=
hort, and scenarios/density where there are MP routers not picked as MPRs? =
Because that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)12=
45 242194</a>
 =C2=A0| =C2=A0<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:b=
lack">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt=
">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stro=
ng><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside ou=
r organization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span><blockquote type=3D"cite"><div><span>_=
______________________________________________</span><br><span>manet mailin=
g list</span><br><span><a href=3D"mailto:manet@ietf.org" target=3D"_blank">=
manet@ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/mailman/=
listinfo/manet" target=3D"_blank">https://www.ietf.org/mailman/listinfo/man=
et</a></span><br></div></blockquote></span></div></blockquote></div><br></d=
iv>
</div></blockquote></div></div></div></blockquote></div><br></div></div>

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From: Christopher Dearlove <christopher.dearlove@gmail.com>
Date: Sat, 4 Jun 2016 23:42:24 +0100
To: Jiazi YI <ietf@jiaziyi.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/manet/XvxXPMgfy5h-iJ0vVPIJ47h1KqA>
Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, Christopher Dearlove <christopher.dearlove@gmail.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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Being advertised in other routers' messages doesn't help - you need to look a=
t the directionality of the links, links in TC messages are outgoing, not in=
coming.

If you need to know destinations are MP that's another matter. But why? All a=
 destination needs to do is receive packets.

However suppose that it is needed, no need to advertise other addresses. Whi=
ch is back at the point I was making about not advertising other addresses. N=
ot needed, even harmful, in the cases I indicated.

--=20
Christopher Dearlove



-- =20
Christopher Dearlove
christopher.dearlove@gmail.com (iPhone)
chris@mnemosyne.demon.co.uk (home)
> On 4 Jun 2016, at 21:15, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
> As long as a router has more than two neighbors in the "topology graph" co=
nstructed, it can be an intermediate router on a route, right?
>=20
> An MP-OLSR router that doesn't advertise any neighbors in its own TC messa=
ge will be advertised in other router's (or routers') TC messages.=20
> Of course, the router receiving such TC messages won't be able to know the=
 neighbors are MP-OLSR enabled or not.=20
> Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can p=
rovide such information.=20
>=20
> Other than being intermediate routers, it's important to know a destinatio=
n is MP-OLSR enabled, if we want to use multi-path routing to such destinati=
on.=20
>=20
> best
>=20
> Jiazi=20
>=20
>> On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <christopher.dearlov=
e@gmail.com> wrote:
>> Actually, as I should have thought earlier, what's the use of advertising=
 just the source route TLV?
>>=20
>> A router that doesn't advertise any neighbours in TC messages can't be an=
 intermediate router on a route. (Exception for two hop routes constructed u=
sing HELLO messages, but those should only be transient.)
>>=20
>> So what's the use case for this feature?
>>=20
>> --=20
>> Christopher Dearlove
>>=20
>>> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>=20
>>=20
>>>=20
>>>=20
>>>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <chris.dear=
love@baesystems.com> wrote:
>>>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps s=
ome guidance on what it should advertise as neighbours.
>>>>=20
>>>> =20
>>>>=20
>>>> I think if advertising at a slower rate, advertising any addresses eith=
er gets into the trap I described, or alternatively advertised with a short v=
alidity time then those links will be transient, which is a bad idea.
>>>>=20
>>>> =20
>>>>=20
>>>> I think what you want is something like (this is not actual suggested w=
ords) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will nitpi=
ck over much greater, so perhaps in terms of the appropriate hold time) then=
 the TC message SHOULD NOT report any addresses [unless the links are known t=
o be exceptionally stable] - the bit in [] could be included or excluded. It=
=E2=80=99s basically an indication of when the SHOULD NOT can be broken sens=
ibly. Known to be stable can be taken from local link information, supplied b=
y neighbour, plus local knowledge. But that may be too much detail to go int=
o.
>>>>=20
>>>=20
>>> Is it necessary to specify that the router "SHOULD NOT report addresses"=
 in this case? I think it will be an "empty" TC message anyways? Because if a=
 router doesn't generate TC message with TC_INTERVAL, it generally means tha=
t there is no link to report.=20
>>>=20
>>> Jiazi
>>> =20
>>>> =20
>>>>=20
>>>> --
>>>>=20
>>>> Christopher Dearlove
>>>> Senior Principal Engineer
>>>> BAE Systems Applied Intelligence Laboratories
>>>> _______________________________________________________________________=
___
>>>>=20
>>>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>>>=20
>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Bad=
dow, Chelmsford, Essex CM2 8HN.
>>>> www.baesystems.com/ai
>>>>=20
>>>> BAE Systems Applied Intelligence Limited
>>>> Registered in England & Wales No: 01337451
>>>>=20
>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>=20
>>>> =20
>>>>=20
>>>> From: yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] On Behalf Of Jiazi=
 YI
>>>> Sent: 01 June 2016 21:59
>>>> To: Dearlove, Christopher (UK)
>>>> Cc: manet
>>>> Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished=

>>>>=20
>>>> =20
>>>>=20
>>>> =20
>>>>=20
>>>> *** WARNING ***
>>>>=20
>>>> This message originates from outside our organisation, either from an e=
xternal partner or the internet.
>>>> Consider carefully whether you should click on any links, open any atta=
chments or reply.
>>>> For information regarding Red Flags that you can look out for in emails=
 you receive, click here.
>>>> If you feel the email is suspicious, please follow this process.
>>>>=20
>>>> Hi Chris,=20
>>>>=20
>>>> =20
>>>>=20
>>>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <chris.dearl=
ove@baesystems.com> wrote:
>>>>=20
>>>> I will at some point find my editorial comments.
>>>>=20
>>>> =20
>>>>=20
>>>> Thanks very much.
>>>>=20
>>>>  =20
>>>>=20
>>>> =20
>>>>=20
>>>> While the below is generally as discussed, I don=E2=80=99t think the SR=
_TC_INTERVAL point captures all of my concern.
>>>>=20
>>>> =20
>>>>=20
>>>> =20
>>>>=20
>>>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL d=
oesn't imply that the related links have longer validity time. All the MP-OL=
SR routers have to generate TC messages as required by OLSR.=20
>>>>=20
>>>> =20
>>>>=20
>>>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_RO=
UTE TLV (so that the other routers can learn that the originators support so=
urce routing), in case they are not required to generate TC messages.=20
>>>>=20
>>>> =20
>>>>=20
>>>> best
>>>>=20
>>>> =20
>>>>=20
>>>> Jiazi
>>>>=20
>>>> =20
>>>>=20
>>>> =20
>>>>=20
>>>> =20
>>>>=20
>>>> We have some routers putting out infrequent TCs. This must mean they ha=
ve long validity times. But there is nothing inherently different about thos=
e links, they can be chosen by pot luck.
>>>>=20
>>>> =20
>>>>=20
>>>> (Example, four routers in a square, all sides are links, diagonals are n=
ot. Each will pick one neighbour as an MPR. Each link will have a 1/2 chance=
 of being advertised in each direction, all else being equal.)
>>>>=20
>>>> =20
>>>>=20
>>>> So why can we accept some links having long durations? If any link coul=
d, then why not have a long TC_INTERVAL everywhere? (If worried about conver=
gence, set either a short initial value or a short minimum interval.) If not=
, then consider a non-MP router. To it, those are just links like any other.=
 And may have long validity time but short useful lifetime (that=E2=80=99s t=
he situation we=E2=80=99ve reached here). Which is bad.
>>>>=20
>>>> =20
>>>>=20
>>>> You note simulations done. But what simulations have been done on scena=
rios with mixed MP and non-MP routers, mobility such that basic TC_INTERVAL i=
s appropriate but not overshort, and scenarios/density where there are MP ro=
uters not picked as MPRs? Because that=E2=80=99s the problem case here.
>>>>=20
>>>> =20
>>>>=20
>>>> --
>>>>=20
>>>> Christopher Dearlove
>>>> Senior Principal Engineer
>>>> BAE Systems Applied Intelligence Laboratories
>>>> _______________________________________________________________________=
___
>>>>=20
>>>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>>>=20
>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Bad=
dow, Chelmsford, Essex CM2 8HN.
>>>> www.baesystems.com/ai
>>>>=20
>>>> BAE Systems Applied Intelligence Limited
>>>> Registered in England & Wales No: 01337451
>>>>=20
>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>=20
>>>> =20
>>>>=20
>>>> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Jiazi YI
>>>> Sent: 30 May 2016 22:25
>>>> To: manet
>>>> Subject: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>>>=20
>>>> =20
>>>>=20
>>>> =20
>>>>=20
>>>> *** WARNING ***
>>>>=20
>>>> This message originates from outside our organisation, either from an e=
xternal partner or the internet.
>>>> Consider carefully whether you should click on any links, open any atta=
chments or reply.
>>>> For information regarding Red Flags that you can look out for in emails=
 you receive, click here.
>>>> If you feel the email is suspicious, please follow this process.
>>>>=20
>>>> *** WARNING ***
>>>> EXTERNAL EMAIL -- This message originates from outside our organization=
.
>>>>=20
>>>> =20
>>>>=20
>>>> Hi all,=20
>>>>=20
>>>> =20
>>>>=20
>>>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got v=
aluable comments from Chris -- thanks very much!
>>>>=20
>>>> =20
>>>>=20
>>>> Based on the comments received, a new revision will be submitted soon w=
ith following updates:
>>>>=20
>>>> =20
>>>>=20
>>>>    - Make the style more consistent with other OLSRv2-RFC suite.=20
>>>>=20
>>>> =20
>>>>=20
>>>>    - Make the reactive multipath calculation optional. Both proactive a=
nd reactive calculation can be used. Such modification won't impact interope=
rability.=20
>>>>=20
>>>> =20
>>>>=20
>>>>    - Clarify the use of SR_TC_INTERVAL.=20
>>>>=20
>>>> =20
>>>>=20
>>>>    - Clarify the generation/update of Multi-path routing Set (this is r=
elated to reactive/proactive calculation also)
>>>>=20
>>>> =20
>>>>=20
>>>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>>>=20
>>>> =20
>>>>=20
>>>>    - Chris raised the concern about impact partial topology map on mult=
ipath calculation. As indicated in https://www.ietf.org/mail-archive/web/man=
et/current/msg19038.html , with non-trival amount of studies performed, no i=
ssue related to this has been reported yet. As it's related to the MPR-selec=
tion algorithm used, we can put it as one of the experimental points to make=
 people pay attention to it, so that new issues can be reported.=20
>>>>=20
>>>> =20
>>>>=20
>>>> regards
>>>>=20
>>>> =20
>>>>=20
>>>> Jiazi
>>>>=20
>>>> ********************************************************************
>>>> This email and any attachments are confidential to the intended
>>>> recipient and may also be privileged. If you are not the intended
>>>> recipient please delete it from your system and notify the sender.
>>>> You should not copy it or use it for any purpose nor disclose or
>>>> distribute its contents to any other person.
>>>> ********************************************************************
>>>>=20
>>>=20
>>> _______________________________________________
>>> manet mailing list
>>> manet@ietf.org
>>> https://www.ietf.org/mailman/listinfo/manet
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><span></span></div><div><meta http-equ=
iv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div>Being advert=
ised in other routers' messages doesn't help - you need to look at the direc=
tionality of the links, links in TC messages are outgoing, not incoming.</di=
v><div><br></div><div>If you need to know destinations are MP that's another=
 matter. But why? All a destination needs to do is receive packets.</div><di=
v><br></div><div>However suppose that it is needed, no need to advertise oth=
er addresses. Which is back at the point I was making about not advertising o=
ther addresses. Not needed, even harmful, in the cases I indicated.<br><br>-=
-&nbsp;<div>Christopher Dearlove</div></div><div><br><div><br><br>-- &nbsp;<=
div>Christopher Dearlove</div><div><a href=3D"mailto:christopher.dearlove@gm=
ail.com">christopher.dearlove@gmail.com</a> (iPhone)</div><div><a href=3D"ma=
ilto:chris@mnemosyne.demon.co.uk">chris@mnemosyne.demon.co.uk</a> (home)</di=
v></div>On 4 Jun 2016, at 21:15, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi=
.com">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"=
><div><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-=
8"><div dir=3D"ltr">As long as a router has more than two neighbors in the "=
topology graph" constructed, it can be an intermediate router on a route, ri=
ght?<div><br></div><div>An MP-OLSR router that doesn't advertise any neighbo=
rs in its own TC message will be advertised in other router's (or routers') T=
C messages.&nbsp;</div><div>Of course, the router receiving such TC messages=
 won't be able to know the neighbors are MP-OLSR enabled or not.&nbsp;</div>=
<div>Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV ca=
n provide such information.&nbsp;</div><div><br></div><div>Other than being i=
ntermediate routers, it's important to know a destination is MP-OLSR enabled=
, if we want to use multi-path routing to such destination.&nbsp;</div><div>=
<br></div><div>best</div><div><br></div><div>Jiazi&nbsp;</div></div><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, Jun 4, 2016 at 9:0=
4 AM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:christoph=
er.dearlove@gmail.com" target=3D"_blank">christopher.dearlove@gmail.com</a>&=
gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div>Ac=
tually, as I should have thought earlier, what's the use of advertising just=
 the source route TLV?</div><div><br></div><div>A router that doesn't advert=
ise any neighbours in TC messages can't be an intermediate router on a route=
. (Exception for two hop routes constructed using HELLO messages, but those s=
hould only be transient.)</div><div><br></div><div>So what's the use case fo=
r this feature?<span class=3D"HOEnZb"><font color=3D"#888888"><br><br>--&nbs=
p;<div>Christopher Dearlove</div></font></span></div><span class=3D""><div><=
br>On 3 Jun 2016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com"=
 target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div></span><div>=
<div class=3D"h5"><blockquote type=3D"cite"><div><div dir=3D"ltr"><br><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jun 2, 2016 at 1=
0:45 AM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a href=3D"mailto:=
chris.dearlove@baesystems.com" target=3D"_blank">chris.dearlove@baesystems.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is just t=
o advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it should a=
dvertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at a=
 slower rate, advertising any addresses either gets into the trap I describe=
d, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is so=
mething like (this is not actual suggested words) if SR_TC_INTERVAL is much g=
reater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mess=
age SHOULD NOT report any addresses [unless the links are known to be except=
ionally stable] - the bit in [] could be included or excluded. It=E2=80=99s b=
asically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local link=
 information, supplied by neighbour, plus local knowledge. But that may be t=
oo much detail to go into.</span></p></div></div></blockquote><div><br></div=
><div>Is it necessary to specify that the router "SHOULD NOT report addresse=
s" in this case? I think it will be an "empty" TC message anyways? Because i=
f a router doesn't generate TC message with TC_INTERVAL, it generally means t=
hat there is no link to report.&nbsp;</div><div><br></div><div>Jiazi</div><d=
iv>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u=
></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" target=3D=
"_blank">+44 (0)1245 242194</a> &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris=
.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><=
u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><=
span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_b=
lank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail.com" t=
arget=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finish=
ed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;=
;color:black"><u></u>&nbsp;<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&q=
uot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;font=
-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u></=
u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher=
 (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank"=
>chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find m=
y editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is generall=
y as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures all o=
f
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the long=
er SR_TC_INTERVAL doesn't imply that the related links have longer validity t=
ime. All the MP-OLSR routers have to generate TC messages as required by OLS=
R.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to a=
dvertise SOURCE_ROUTE TLV (so that the other routers can learn that the orig=
inators support source routing), in case they are not required to generate T=
C messages.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers puttin=
g out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chosen=
 by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in a=
 square, all sides are links, diagonals are not. Each will pick one neighbou=
r
 as an MPR. Each link will have a 1/2 chance of being advertised in each dir=
ection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some l=
inks having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short i=
nitial value or a short minimum interval.) If not, then consider a non-MP ro=
uter. To it, those are just links like any other. And may have long validity=
 time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done. B=
ut what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not oversh=
ort, and scenarios/density where there are MP routers not picked as MPRs? Be=
cause that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)1245 2=
42194</a>
 &nbsp;| &nbsp;<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" ta=
rget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><=
u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span la=
ng=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;=
sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished</=
span><u></u><u></u></p>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
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d:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:bl=
ack">&nbsp;</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
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<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
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</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt"=
>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stron=
g><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:&=
quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fami=
ly:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside our o=
rganization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial&quo=
t;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has f=
inished. We got valuable comments from Chris -- thanks very much!<u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will b=
e submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the style more consistent with ot=
her OLSRv2-RFC suite.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the reactive multipath calculatio=
n optional. Both proactive and reactive calculation can be used. Such modifi=
cation won't impact interoperability.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of SR_TC_INTERVAL.&nbs=
p;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the generation/update of Multi=
-path routing Set (this is related to reactive/proactive calculation also)<u=
></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of fp and fe in the mu=
ltipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Chris raised the concern about impact p=
artial topology map on multipath calculation. As indicated in&nbsp;<a href=3D=
"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" target=3D=
"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038.html</=
a>
 , with non-trival amount of studies performed, no issue related to this has=
 been reported yet. As it's related to the MPR-selection algorithm used, we c=
an put it as one of the experimental points to make people pay attention to i=
t, so that new issues can be
 reported.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u><=
u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span class=3D""><blockquote type=3D"cite"><d=
iv><span>_______________________________________________</span><br><span>man=
et mailing list</span><br><span><a href=3D"mailto:manet@ietf.org" target=3D"=
_blank">manet@ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/m=
ailman/listinfo/manet" target=3D"_blank">https://www.ietf.org/mailman/listin=
fo/manet</a></span><br></div></blockquote></span></div></blockquote></div><b=
r></div>
</div></blockquote></div></body></html>=

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From: Christopher Dearlove <christopher.dearlove@gmail.com>
Date: Sat, 4 Jun 2016 23:53:15 +0100
To: Jiazi YI <ietf@jiaziyi.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/manet/vUkh6xn5OpTTMkUyxTjRKB8683k>
Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, Christopher Dearlove <christopher.dearlove@gmail.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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There we need to know what behaviour is. But there's no need for the destina=
tion to care - the packet is for it, it's not being forwarded, who cares if t=
here's a source routing header or not? Or at least that's a sensible way to i=
mplement. What do real implementations do?

But that's an aside from the point I made about indicating about not adverti=
sing neighbours. Which you challenged, but I think are now indicating you ca=
n see why.

In fact I think I understated it.=20

Advertising addresses in such a TC message is almost never of any use. Almos=
t never? If other routers only advertise MPR selectors, never useful. If the=
y might advertise other links, possibly useful. Except likely damaging if wi=
th a significantly longer interval.

Which reinforces an earlier made point that discussing advertised links is s=
omething this draft should do, and doesn't. In addition to these extra TC me=
ssages not advertising links if at a significantly longer interval.

-- =20
Christopher Dearlove

> On 4 Jun 2016, at 23:39, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
>=20
>=20
>> On Sun, Jun 5, 2016 at 12:23 AM, Christopher Dearlove <chris@mnemosyne.de=
mon.co.uk> wrote:
>> Being advertised in other routers' messages doesn't help - you need to lo=
ok at the directionality of the links, links in TC messages are outgoing, no=
t incoming.
>>=20
>> If you need to know destinations are MP that's another matter. But why? A=
ll a destination needs to do is receive packets.
>=20
> There is a source routing header in the packets, the destination needs to k=
now how to deal with it. Or else, the behaviour would be unpredictable.=20
> =20
>>=20
>> However suppose that it is needed, no need to advertise other addresses. W=
hich is back at the point I was making about not advertising other addresses=
. Not needed, even harmful, in the cases I indicated.
>=20
> I would agree with not advertising other addresses.=20
>=20
> Jiazi
> =20
>>=20
>>=20
>> --=20
>> Christopher Dearlove
>>=20
>>> On 4 Jun 2016, at 21:15, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>=20
>>> As long as a router has more than two neighbors in the "topology graph" c=
onstructed, it can be an intermediate router on a route, right?
>>>=20
>>> An MP-OLSR router that doesn't advertise any neighbors in its own TC mes=
sage will be advertised in other router's (or routers') TC messages.=20
>>> Of course, the router receiving such TC messages won't be able to know t=
he neighbors are MP-OLSR enabled or not.=20
>>> Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can=
 provide such information.=20
>>>=20
>>> Other than being intermediate routers, it's important to know a destinat=
ion is MP-OLSR enabled, if we want to use multi-path routing to such destina=
tion.=20
>>>=20
>>> best
>>>=20
>>> Jiazi=20
>>>=20
>>>> On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <christopher.dearl=
ove@gmail.com> wrote:
>>>> Actually, as I should have thought earlier, what's the use of advertisi=
ng just the source route TLV?
>>>>=20
>>>> A router that doesn't advertise any neighbours in TC messages can't be a=
n intermediate router on a route. (Exception for two hop routes constructed u=
sing HELLO messages, but those should only be transient.)
>>>>=20
>>>> So what's the use case for this feature?
>>>>=20
>>>> --=20
>>>> Christopher Dearlove
>>>>=20
>>>>> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>>>=20
>>>>=20
>>>>>=20
>>>>>=20
>>>>>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <chris.de=
arlove@baesystems.com> wrote:
>>>>>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhap=
s some guidance on what it should advertise as neighbours.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> I think if advertising at a slower rate, advertising any addresses ei=
ther gets into the trap I described, or alternatively advertised with a shor=
t validity time then those links will be transient, which is a bad idea.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> I think what you want is something like (this is not actual suggested=
 words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone will nit=
pick over much greater, so perhaps in terms of the appropriate hold time) th=
en the TC message SHOULD NOT report any addresses [unless the links are know=
n to be exceptionally stable] - the bit in [] could be included or excluded.=
 It=E2=80=99s basically an indication of when the SHOULD NOT can be broken s=
ensibly. Known to be stable can be taken from local link information, suppli=
ed by neighbour, plus local knowledge. But that may be too much detail to go=
 into.
>>>>>>=20
>>>>>=20
>>>>> Is it necessary to specify that the router "SHOULD NOT report addresse=
s" in this case? I think it will be an "empty" TC message anyways? Because i=
f a router doesn't generate TC message with TC_INTERVAL, it generally means t=
hat there is no link to report.=20
>>>>>=20
>>>>> Jiazi
>>>>> =20
>>>>>> =20
>>>>>>=20
>>>>>> --
>>>>>>=20
>>>>>> Christopher Dearlove
>>>>>> Senior Principal Engineer
>>>>>> BAE Systems Applied Intelligence Laboratories
>>>>>> _____________________________________________________________________=
_____
>>>>>>=20
>>>>>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>>>>>=20
>>>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great B=
addow, Chelmsford, Essex CM2 8HN.
>>>>>> www.baesystems.com/ai
>>>>>>=20
>>>>>> BAE Systems Applied Intelligence Limited
>>>>>> Registered in England & Wales No: 01337451
>>>>>>=20
>>>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> From: yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] On Behalf Of Jia=
zi YI
>>>>>> Sent: 01 June 2016 21:59
>>>>>> To: Dearlove, Christopher (UK)
>>>>>> Cc: manet
>>>>>> Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finish=
ed
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> *** WARNING ***
>>>>>>=20
>>>>>> This message originates from outside our organisation, either from an=
 external partner or the internet.
>>>>>> Consider carefully whether you should click on any links, open any at=
tachments or reply.
>>>>>> For information regarding Red Flags that you can look out for in emai=
ls you receive, click here.
>>>>>> If you feel the email is suspicious, please follow this process.
>>>>>>=20
>>>>>> Hi Chris,=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <chris.dea=
rlove@baesystems.com> wrote:
>>>>>>=20
>>>>>> I will at some point find my editorial comments.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> Thanks very much.
>>>>>>=20
>>>>>>  =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> While the below is generally as discussed, I don=E2=80=99t think the S=
R_TC_INTERVAL point captures all of my concern.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVA=
L doesn't imply that the related links have longer validity time. All the MP=
-OLSR routers have to generate TC messages as required by OLSR.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise SOURCE_=
ROUTE TLV (so that the other routers can learn that the originators support s=
ource routing), in case they are not required to generate TC messages.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> best
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> Jiazi
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> We have some routers putting out infrequent TCs. This must mean they h=
ave long validity times. But there is nothing inherently different about tho=
se links, they can be chosen by pot luck.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> (Example, four routers in a square, all sides are links, diagonals ar=
e not. Each will pick one neighbour as an MPR. Each link will have a 1/2 cha=
nce of being advertised in each direction, all else being equal.)
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> So why can we accept some links having long durations? If any link co=
uld, then why not have a long TC_INTERVAL everywhere? (If worried about conv=
ergence, set either a short initial value or a short minimum interval.) If n=
ot, then consider a non-MP router. To it, those are just links like any othe=
r. And may have long validity time but short useful lifetime (that=E2=80=99s=
 the situation we=E2=80=99ve reached here). Which is bad.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> You note simulations done. But what simulations have been done on sce=
narios with mixed MP and non-MP routers, mobility such that basic TC_INTERVA=
L is appropriate but not overshort, and scenarios/density where there are MP=
 routers not picked as MPRs? Because that=E2=80=99s the problem case here.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> --
>>>>>>=20
>>>>>> Christopher Dearlove
>>>>>> Senior Principal Engineer
>>>>>> BAE Systems Applied Intelligence Laboratories
>>>>>> _____________________________________________________________________=
_____
>>>>>>=20
>>>>>> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>>>>>>=20
>>>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great B=
addow, Chelmsford, Essex CM2 8HN.
>>>>>> www.baesystems.com/ai
>>>>>>=20
>>>>>> BAE Systems Applied Intelligence Limited
>>>>>> Registered in England & Wales No: 01337451
>>>>>>=20
>>>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Jiazi YI
>>>>>> Sent: 30 May 2016 22:25
>>>>>> To: manet
>>>>>> Subject: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> *** WARNING ***
>>>>>>=20
>>>>>> This message originates from outside our organisation, either from an=
 external partner or the internet.
>>>>>> Consider carefully whether you should click on any links, open any at=
tachments or reply.
>>>>>> For information regarding Red Flags that you can look out for in emai=
ls you receive, click here.
>>>>>> If you feel the email is suspicious, please follow this process.
>>>>>>=20
>>>>>> *** WARNING ***
>>>>>> EXTERNAL EMAIL -- This message originates from outside our organizati=
on.
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> Hi all,=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got=
 valuable comments from Chris -- thanks very much!
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> Based on the comments received, a new revision will be submitted soon=
 with following updates:
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Make the style more consistent with other OLSRv2-RFC suite.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Make the reactive multipath calculation optional. Both proactive=
 and reactive calculation can be used. Such modification won't impact intero=
perability.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Clarify the use of SR_TC_INTERVAL.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Clarify the generation/update of Multi-path routing Set (this is=
 related to reactive/proactive calculation also)
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm=

>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>>    - Chris raised the concern about impact partial topology map on mu=
ltipath calculation. As indicated in https://www.ietf.org/mail-archive/web/m=
anet/current/msg19038.html , with non-trival amount of studies performed, no=
 issue related to this has been reported yet. As it's related to the MPR-sel=
ection algorithm used, we can put it as one of the experimental points to ma=
ke people pay attention to it, so that new issues can be reported.=20
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> regards
>>>>>>=20
>>>>>> =20
>>>>>>=20
>>>>>> Jiazi
>>>>>>=20
>>>>>> ********************************************************************
>>>>>> This email and any attachments are confidential to the intended
>>>>>> recipient and may also be privileged. If you are not the intended
>>>>>> recipient please delete it from your system and notify the sender.
>>>>>> You should not copy it or use it for any purpose nor disclose or
>>>>>> distribute its contents to any other person.
>>>>>> ********************************************************************
>>>>>>=20
>>>>>=20
>>>>> _______________________________________________
>>>>> manet mailing list
>>>>> manet@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/manet
>=20

--Apple-Mail-29FC8AC3-F2D2-4134-995F-7686489D722D
Content-Type: text/html;
	charset=utf-8
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>There we need to know what behaviour i=
s. But there's no need for the destination to care - the packet is for it, i=
t's not being forwarded, who cares if there's a source routing header or not=
? Or at least that's a sensible way to implement. What do real implementatio=
ns do?</div><div id=3D"AppleMailSignature"><br></div><div id=3D"AppleMailSig=
nature">But that's an aside from the point I made about indicating about not=
 advertising neighbours. Which you challenged, but I think are now indicatin=
g you can see why.</div><div id=3D"AppleMailSignature"><br></div><div id=3D"=
AppleMailSignature">In fact I think I understated it.&nbsp;</div><div id=3D"=
AppleMailSignature"><br></div><div id=3D"AppleMailSignature">Advertising add=
resses in such a TC message is almost never of any use. Almost never? If oth=
er routers only advertise MPR selectors, never useful. If they might adverti=
se other links, possibly useful. Except likely damaging if with a significan=
tly longer interval.</div><div id=3D"AppleMailSignature"><br></div><div id=3D=
"AppleMailSignature">Which reinforces an earlier made point that discussing a=
dvertised links is something this draft should do, and doesn't. In addition t=
o these extra TC messages not advertising links if at a significantly longer=
 interval.</div><div id=3D"AppleMailSignature"><br>-- &nbsp;<div>Christopher=
 Dearlove</div></div><div><br>On 4 Jun 2016, at 23:39, Jiazi YI &lt;<a href=3D=
"mailto:ietf@jiaziyi.com">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><bloc=
kquote type=3D"cite"><div><meta http-equiv=3D"Content-Type" content=3D"text/=
html; charset=3Dutf-8"><div dir=3D"ltr"><div><br></div><div class=3D"gmail_e=
xtra"><br><div class=3D"gmail_quote">On Sun, Jun 5, 2016 at 12:23 AM, Christ=
opher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:chris@mnemosyne.demon=
.co.uk" target=3D"_blank">chris@mnemosyne.demon.co.uk</a>&gt;</span> wrote:<=
br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div>Being advertised in o=
ther routers' messages doesn't help - you need to look at the directionality=
 of the links, links in TC messages are outgoing, not incoming.</div><div><b=
r></div><div>If you need to know destinations are MP that's another matter. B=
ut why? All a destination needs to do is receive packets.</div></div></block=
quote><div><br></div><div>There is a source routing header in the packets, t=
he destination needs to know how to deal with it. Or else, the behaviour wou=
ld be unpredictable.&nbsp;</div><div>&nbsp;</div><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div dir=3D"auto"><div><br></div><div>However suppose that it is needed, n=
o need to advertise other addresses. Which is back at the point I was making=
 about not advertising other addresses. Not needed, even harmful, in the cas=
es I indicated.</div></div></blockquote><div><br></div><div>I would agree wi=
th not advertising other addresses.&nbsp;</div><div><br></div><div>Jiazi</di=
v><div>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .=
8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div><spa=
n class=3D"HOEnZb"><font color=3D"#888888"><br><br>--&nbsp;<div>Christopher D=
earlove</div></font></span></div><div><div class=3D"h5"><div><br>On 4 Jun 20=
16, at 21:15, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" target=3D"_bl=
ank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite">=
<div><div dir=3D"ltr">As long as a router has more than two neighbors in the=
 "topology graph" constructed, it can be an intermediate router on a route, r=
ight?<div><br></div><div>An MP-OLSR router that doesn't advertise any neighb=
ors in its own TC message will be advertised in other router's (or routers')=
 TC messages.&nbsp;</div><div>Of course, the router receiving such TC messag=
es won't be able to know the neighbors are MP-OLSR enabled or not.&nbsp;</di=
v><div>Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV c=
an provide such information.&nbsp;</div><div><br></div><div>Other than being=
 intermediate routers, it's important to know a destination is MP-OLSR enabl=
ed, if we want to use multi-path routing to such destination.&nbsp;</div><di=
v><br></div><div>best</div><div><br></div><div>Jiazi&nbsp;</div></div><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, Jun 4, 2016 at 9=
:04 AM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:christo=
pher.dearlove@gmail.com" target=3D"_blank">christopher.dearlove@gmail.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div>=
Actually, as I should have thought earlier, what's the use of advertising ju=
st the source route TLV?</div><div><br></div><div>A router that doesn't adve=
rtise any neighbours in TC messages can't be an intermediate router on a rou=
te. (Exception for two hop routes constructed using HELLO messages, but thos=
e should only be transient.)</div><div><br></div><div>So what's the use case=
 for this feature?<span><font color=3D"#888888"><br><br>--&nbsp;<div>Christo=
pher Dearlove</div></font></span></div><span><div><br>On 3 Jun 2016, at 21:2=
5, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" target=3D"_blank">ietf@j=
iaziyi.com</a>&gt; wrote:<br><br></div></span><div><div><blockquote type=3D"=
cite"><div><div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D=
"gmail_quote">On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D=
"_blank">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is just t=
o advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it should a=
dvertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at a=
 slower rate, advertising any addresses either gets into the trap I describe=
d, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is so=
mething like (this is not actual suggested words) if SR_TC_INTERVAL is much g=
reater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mess=
age SHOULD NOT report any addresses [unless the links are known to be except=
ionally stable] - the bit in [] could be included or excluded. It=E2=80=99s b=
asically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local link=
 information, supplied by neighbour, plus local knowledge. But that may be t=
oo much detail to go into.</span></p></div></div></blockquote><div><br></div=
><div>Is it necessary to specify that the router "SHOULD NOT report addresse=
s" in this case? I think it will be an "empty" TC message anyways? Because i=
f a router doesn't generate TC message with TC_INTERVAL, it generally means t=
hat there is no link to report.&nbsp;</div><div><br></div><div>Jiazi</div><d=
iv>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u=
></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" target=3D=
"_blank">+44 (0)1245 242194</a> &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris=
.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><=
u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>&nbsp;<u></u></span>=
</p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><=
span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_b=
lank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail.com" t=
arget=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finish=
ed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;=
;color:black"><u></u>&nbsp;<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&q=
uot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;font=
-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u></=
u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher=
 (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank"=
>chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find m=
y editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is generall=
y as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures all o=
f
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the long=
er SR_TC_INTERVAL doesn't imply that the related links have longer validity t=
ime. All the MP-OLSR routers have to generate TC messages as required by OLS=
R.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to a=
dvertise SOURCE_ROUTE TLV (so that the other routers can learn that the orig=
inators support source routing), in case they are not required to generate T=
C messages.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm=
 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers puttin=
g out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chosen=
 by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in a=
 square, all sides are links, diagonals are not. Each will pick one neighbou=
r
 as an MPR. Each link will have a 1/2 chance of being advertised in each dir=
ection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some l=
inks having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short i=
nitial value or a short minimum interval.) If not, then consider a non-MP ro=
uter. To it, those are just links like any other. And may have long validity=
 time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done. B=
ut what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not oversh=
ort, and scenarios/density where there are MP routers not picked as MPRs? Be=
cause that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"font=
-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007=
e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#bebebe">______________________________________=
____________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot=
;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0pt;=
font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: &nbsp;=
<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)1245 2=
42194</a>
 &nbsp;| &nbsp;<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" ta=
rget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sa=
ns-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford T=
echnology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"co=
lor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligen=
ce Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-si=
ze:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b92"=
>Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><=
u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#1f497d">&nbsp;</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span la=
ng=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;=
sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished</=
span><u></u><u></u></p>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:bl=
ack">&nbsp;</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgroun=
d:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans-=
serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-a=
lign:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">This message originates from outside our organis=
ation, either from an external partner or the internet.</span></em><i><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Con=
sider carefully whether you should click on any links, open any attachments o=
r reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">For=
 information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quot=
;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></strong>=
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972"> that you can look out for in emails you receive=
,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spot=
lights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If y=
ou feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/=
Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt"=
>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stron=
g><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:&=
quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fami=
ly:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside our o=
rganization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial&quo=
t;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,&nbsp;<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has f=
inished. We got valuable comments from Chris -- thanks very much!<u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will b=
e submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the style more consistent with ot=
her OLSRv2-RFC suite.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Make the reactive multipath calculatio=
n optional. Both proactive and reactive calculation can be used. Such modifi=
cation won't impact interoperability.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of SR_TC_INTERVAL.&nbs=
p;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the generation/update of Multi=
-path routing Set (this is related to reactive/proactive calculation also)<u=
></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Clarify the use of fp and fe in the mu=
ltipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp; &nbsp;- Chris raised the concern about impact p=
artial topology map on multipath calculation. As indicated in&nbsp;<a href=3D=
"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" target=3D=
"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038.html</=
a>
 , with non-trival amount of studies performed, no issue related to this has=
 been reported yet. As it's related to the MPR-selection algorithm used, we c=
an put it as one of the experimental points to make people pay attention to i=
t, so that new issues can be
 reported.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u><=
u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span><blockquote type=3D"cite"><div><span>__=
_____________________________________________</span><br><span>manet mailing l=
ist</span><br><span><a href=3D"mailto:manet@ietf.org" target=3D"_blank">mane=
t@ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/mailman/listi=
nfo/manet" target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a>=
</span><br></div></blockquote></span></div></blockquote></div><br></div>
</div></blockquote></div></div></div></blockquote></div><br></div></div>
</div></blockquote></body></html>=

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From: Jiazi YI <ietf@jiaziyi.com>
Date: Sun, 5 Jun 2016 01:16:50 +0200
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Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, manet <manet@ietf.org>
Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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On Sun, Jun 5, 2016 at 12:53 AM, Christopher Dearlove <
christopher.dearlove@gmail.com> wrote:

> There we need to know what behaviour is. But there's no need for the
> destination to care - the packet is for it, it's not being forwarded, who
> cares if there's a source routing header or not? Or at least that's a
> sensible way to implement. What do real implementations do?
>

It's *possible* that the destination doesn't understand the source routing
header and dropped it directly. It really depends on the implementation. To
make sure that the packet is delivered, we use multipath only to the
SRC_ROUTE supported routers -- or else, falling back to single path.



>
> But that's an aside from the point I made about indicating about not
> advertising neighbours. Which you challenged, but I think are now
> indicating you can see why.
>
> In fact I think I understated it.
>
> Advertising addresses in such a TC message is almost never of any use.
> Almost never? If other routers only advertise MPR selectors, never useful=
.
> If they might advertise other links, possibly useful. Except likely
> damaging if with a significantly longer interval.
>
> Which reinforces an earlier made point that discussing advertised links i=
s
> something this draft should do, and doesn't. In addition to these extra T=
C
> messages not advertising links if at a significantly longer interval.
>

We will add some text about that.

best

Jiazi


>
> --
> Christopher Dearlove
>
> On 4 Jun 2016, at 23:39, Jiazi YI <ietf@jiaziyi.com> wrote:
>
>
>
> On Sun, Jun 5, 2016 at 12:23 AM, Christopher Dearlove <
> chris@mnemosyne.demon.co.uk> wrote:
>
>> Being advertised in other routers' messages doesn't help - you need to
>> look at the directionality of the links, links in TC messages are outgoi=
ng,
>> not incoming.
>>
>> If you need to know destinations are MP that's another matter. But why?
>> All a destination needs to do is receive packets.
>>
>
> There is a source routing header in the packets, the destination needs to
> know how to deal with it. Or else, the behaviour would be unpredictable.
>
>
>>
>> However suppose that it is needed, no need to advertise other addresses.
>> Which is back at the point I was making about not advertising other
>> addresses. Not needed, even harmful, in the cases I indicated.
>>
>
> I would agree with not advertising other addresses.
>
> Jiazi
>
>
>>
>>
>> --
>> Christopher Dearlove
>>
>> On 4 Jun 2016, at 21:15, Jiazi YI <ietf@jiaziyi.com> wrote:
>>
>> As long as a router has more than two neighbors in the "topology graph"
>> constructed, it can be an intermediate router on a route, right?
>>
>> An MP-OLSR router that doesn't advertise any neighbors in its own TC
>> message will be advertised in other router's (or routers') TC messages.
>> Of course, the router receiving such TC messages won't be able to know
>> the neighbors are MP-OLSR enabled or not.
>> Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can
>> provide such information.
>>
>> Other than being intermediate routers, it's important to know a
>> destination is MP-OLSR enabled, if we want to use multi-path routing to
>> such destination.
>>
>> best
>>
>> Jiazi
>>
>> On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <
>> christopher.dearlove@gmail.com> wrote:
>>
>>> Actually, as I should have thought earlier, what's the use of
>>> advertising just the source route TLV?
>>>
>>> A router that doesn't advertise any neighbours in TC messages can't be
>>> an intermediate router on a route. (Exception for two hop routes
>>> constructed using HELLO messages, but those should only be transient.)
>>>
>>> So what's the use case for this feature?
>>>
>>> --
>>> Christopher Dearlove
>>>
>>> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>
>>>
>>>
>>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <
>>> chris.dearlove@baesystems.com> wrote:
>>>
>>>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhaps
>>>> some guidance on what it should advertise as neighbours.
>>>>
>>>>
>>>>
>>>> I think if advertising at a slower rate, advertising any addresses
>>>> either gets into the trap I described, or alternatively advertised wit=
h a
>>>> short validity time then those links will be transient, which is a bad=
 idea.
>>>>
>>>>
>>>>
>>>> I think what you want is something like (this is not actual suggested
>>>> words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone wil=
l
>>>> nitpick over much greater, so perhaps in terms of the appropriate hold
>>>> time) then the TC message SHOULD NOT report any addresses [unless the =
links
>>>> are known to be exceptionally stable] - the bit in [] could be include=
d or
>>>> excluded. It=E2=80=99s basically an indication of when the SHOULD NOT =
can be broken
>>>> sensibly. Known to be stable can be taken from local link information,
>>>> supplied by neighbour, plus local knowledge. But that may be too much
>>>> detail to go into.
>>>>
>>>
>>> Is it necessary to specify that the router "SHOULD NOT report addresses=
"
>>> in this case? I think it will be an "empty" TC message anyways? Because=
 if
>>> a router doesn't generate TC message with TC_INTERVAL, it generally mea=
ns
>>> that there is no link to report.
>>>
>>> Jiazi
>>>
>>>
>>>>
>>>>
>>>> *-- *
>>>>
>>>>
>>>>
>>>>
>>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>>> Intelligence Laboratories *
>>>> *_____________________________________________________________________=
_____
>>>> *
>>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>>
>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>>> Baddow, Chelmsford, Essex CM2 8HN.
>>>> www.baesystems.com/ai
>>>>
>>>> BAE Systems Applied Intelligence Limited
>>>> Registered in England & Wales No: 01337451
>>>>
>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>
>>>>
>>>>
>>>> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] *On Behalf Of *=
Jiazi
>>>> YI
>>>> *Sent:* 01 June 2016 21:59
>>>> *To:* Dearlove, Christopher (UK)
>>>> *Cc:* manet
>>>> *Subject:* Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC
>>>> finished
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> **** WARNING ****
>>>>
>>>> *This message originates from outside our organisation, either from an
>>>> external partner or the internet.*
>>>>
>>>> * Consider carefully whether you should click on any links, open any
>>>> attachments or reply. For information regarding **Red Flags** that you
>>>> can look out for in emails you receive, click here
>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docu=
ments/Red%20Flags.pdf>.*
>>>> * If you feel the email is suspicious, please follow this process
>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docu=
ments/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>>
>>>> Hi Chris,
>>>>
>>>>
>>>>
>>>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
>>>> chris.dearlove@baesystems.com> wrote:
>>>>
>>>> I will at some point find my editorial comments.
>>>>
>>>>
>>>>
>>>> Thanks very much.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> While the below is generally as discussed, I don=E2=80=99t think the
>>>> SR_TC_INTERVAL point captures all of my concern.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVAL
>>>> doesn't imply that the related links have longer validity time. All th=
e
>>>> MP-OLSR routers have to generate TC messages as required by OLSR.
>>>>
>>>>
>>>>
>>>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise
>>>> SOURCE_ROUTE TLV (so that the other routers can learn that the origina=
tors
>>>> support source routing), in case they are not required to generate TC
>>>> messages.
>>>>
>>>>
>>>>
>>>> best
>>>>
>>>>
>>>>
>>>> Jiazi
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> We have some routers putting out infrequent TCs. This must mean they
>>>> have long validity times. But there is nothing inherently different ab=
out
>>>> those links, they can be chosen by pot luck.
>>>>
>>>>
>>>>
>>>> (Example, four routers in a square, all sides are links, diagonals are
>>>> not. Each will pick one neighbour as an MPR. Each link will have a 1/2
>>>> chance of being advertised in each direction, all else being equal.)
>>>>
>>>>
>>>>
>>>> So why can we accept some links having long durations? If any link
>>>> could, then why not have a long TC_INTERVAL everywhere? (If worried ab=
out
>>>> convergence, set either a short initial value or a short minimum inter=
val.)
>>>> If not, then consider a non-MP router. To it, those are just links lik=
e any
>>>> other. And may have long validity time but short useful lifetime (that=
=E2=80=99s
>>>> the situation we=E2=80=99ve reached here). Which is bad.
>>>>
>>>>
>>>>
>>>> You note simulations done. But what simulations have been done on
>>>> scenarios with mixed MP and non-MP routers, mobility such that basic
>>>> TC_INTERVAL is appropriate but not overshort, and scenarios/density wh=
ere
>>>> there are MP routers not picked as MPRs? Because that=E2=80=99s the pr=
oblem case
>>>> here.
>>>>
>>>>
>>>>
>>>> *-- *
>>>>
>>>>
>>>>
>>>>
>>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>>> Intelligence Laboratories *
>>>> *_____________________________________________________________________=
_____
>>>> *
>>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>>
>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>>> Baddow, Chelmsford, Essex CM2 8HN.
>>>> www.baesystems.com/ai
>>>>
>>>> BAE Systems Applied Intelligence Limited
>>>> Registered in England & Wales No: 01337451
>>>>
>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>
>>>>
>>>>
>>>> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
>>>> *Sent:* 30 May 2016 22:25
>>>> *To:* manet
>>>> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> **** WARNING ****
>>>>
>>>> *This message originates from outside our organisation, either from an
>>>> external partner or the internet.*
>>>>
>>>> * Consider carefully whether you should click on any links, open any
>>>> attachments or reply. For information regarding **Red Flags** that you
>>>> can look out for in emails you receive, click here
>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docu=
ments/Red%20Flags.pdf>.*
>>>> * If you feel the email is suspicious, please follow this process
>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Docu=
ments/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>>
>>>> **** **WARNING ******
>>>> EXTERNAL EMAIL -- This message originates from outside our organizatio=
n
>>>> .
>>>>
>>>>
>>>>
>>>> Hi all,
>>>>
>>>>
>>>>
>>>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
>>>> valuable comments from Chris -- thanks very much!
>>>>
>>>>
>>>>
>>>> Based on the comments received, a new revision will be submitted soon
>>>> with following updates:
>>>>
>>>>
>>>>
>>>>    - Make the style more consistent with other OLSRv2-RFC suite.
>>>>
>>>>
>>>>
>>>>    - Make the reactive multipath calculation optional. Both proactive
>>>> and reactive calculation can be used. Such modification won't impact
>>>> interoperability.
>>>>
>>>>
>>>>
>>>>    - Clarify the use of SR_TC_INTERVAL.
>>>>
>>>>
>>>>
>>>>    - Clarify the generation/update of Multi-path routing Set (this is
>>>> related to reactive/proactive calculation also)
>>>>
>>>>
>>>>
>>>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>>>
>>>>
>>>>
>>>>    - Chris raised the concern about impact partial topology map on
>>>> multipath calculation. As indicated in
>>>> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html ,
>>>> with non-trival amount of studies performed, no issue related to this =
has
>>>> been reported yet. As it's related to the MPR-selection algorithm used=
, we
>>>> can put it as one of the experimental points to make people pay attent=
ion
>>>> to it, so that new issues can be reported.
>>>>
>>>>
>>>>
>>>> regards
>>>>
>>>>
>>>>
>>>> Jiazi
>>>>
>>>> ********************************************************************
>>>> This email and any attachments are confidential to the intended
>>>> recipient and may also be privileged. If you are not the intended
>>>> recipient please delete it from your system and notify the sender.
>>>> You should not copy it or use it for any purpose nor disclose or
>>>> distribute its contents to any other person.
>>>> ********************************************************************
>>>>
>>>>
>>>>
>>>
>>> _______________________________________________
>>> manet mailing list
>>> manet@ietf.org
>>> https://www.ietf.org/mailman/listinfo/manet
>>>
>>>
>>
>

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
On Sun, Jun 5, 2016 at 12:53 AM, Christopher Dearlove <span dir=3D"ltr">&lt=
;<a href=3D"mailto:christopher.dearlove@gmail.com" target=3D"_blank">christ=
opher.dearlove@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex"><div dir=3D"auto"><div>There we need to know what behaviour is. But t=
here&#39;s no need for the destination to care - the packet is for it, it&#=
39;s not being forwarded, who cares if there&#39;s a source routing header =
or not? Or at least that&#39;s a sensible way to implement. What do real im=
plementations do?</div></div></blockquote><div><br></div><div>It&#39;s *pos=
sible* that the destination doesn&#39;t understand the source routing heade=
r and dropped it directly. It really depends on the implementation. To make=
 sure that the packet is delivered, we use multipath only to the SRC_ROUTE =
supported routers -- or else, falling back to single path.=C2=A0</div><div>=
<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"=
><div><br></div><div>But that&#39;s an aside from the point I made about in=
dicating about not advertising neighbours. Which you challenged, but I thin=
k are now indicating you can see why.</div><div><br></div><div>In fact I th=
ink I understated it.=C2=A0</div><div><br></div><div>Advertising addresses =
in such a TC message is almost never of any use. Almost never? If other rou=
ters only advertise MPR selectors, never useful. If they might advertise ot=
her links, possibly useful. Except likely damaging if with a significantly =
longer interval.</div><div><br></div><div>Which reinforces an earlier made =
point that discussing advertised links is something this draft should do, a=
nd doesn&#39;t. In addition to these extra TC messages not advertising link=
s if at a significantly longer interval.</div></div></blockquote><div><br><=
/div><div>We will add some text about that.=C2=A0</div><div><br></div><div>=
best</div><div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div dir=3D"auto"><div><br>-- =C2=A0<span class=3D"HOEnZb"><f=
ont color=3D"#888888"><div>Christopher Dearlove</div></font></span></div><d=
iv><div class=3D"h5"><div><br>On 4 Jun 2016, at 23:39, Jiazi YI &lt;<a href=
=3D"mailto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wro=
te:<br><br></div><blockquote type=3D"cite"><div><div dir=3D"ltr"><div><br><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Jun =
5, 2016 at 12:23 AM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"=
mailto:chris@mnemosyne.demon.co.uk" target=3D"_blank">chris@mnemosyne.demon=
.co.uk</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"=
auto"><div>Being advertised in other routers&#39; messages doesn&#39;t help=
 - you need to look at the directionality of the links, links in TC message=
s are outgoing, not incoming.</div><div><br></div><div>If you need to know =
destinations are MP that&#39;s another matter. But why? All a destination n=
eeds to do is receive packets.</div></div></blockquote><div><br></div><div>=
There is a source routing header in the packets, the destination needs to k=
now how to deal with it. Or else, the behaviour would be unpredictable.=C2=
=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto">=
<div><br></div><div>However suppose that it is needed, no need to advertise=
 other addresses. Which is back at the point I was making about not adverti=
sing other addresses. Not needed, even harmful, in the cases I indicated.</=
div></div></blockquote><div><br></div><div>I would agree with not advertisi=
ng other addresses.=C2=A0</div><div><br></div><div>Jiazi</div><div>=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef=
t:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div><span><font color=
=3D"#888888"><br><br>--=C2=A0<div>Christopher Dearlove</div></font></span><=
/div><div><div><div><br>On 4 Jun 2016, at 21:15, Jiazi YI &lt;<a href=3D"ma=
ilto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br=
><br></div><blockquote type=3D"cite"><div><div dir=3D"ltr">As long as a rou=
ter has more than two neighbors in the &quot;topology graph&quot; construct=
ed, it can be an intermediate router on a route, right?<div><br></div><div>=
An MP-OLSR router that doesn&#39;t advertise any neighbors in its own TC me=
ssage will be advertised in other router&#39;s (or routers&#39;) TC message=
s.=C2=A0</div><div>Of course, the router receiving such TC messages won&#39=
;t be able to know the neighbors are MP-OLSR enabled or not.=C2=A0</div><di=
v>Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV can =
provide such information.=C2=A0</div><div><br></div><div>Other than being i=
ntermediate routers, it&#39;s important to know a destination is MP-OLSR en=
abled, if we want to use multi-path routing to such destination.=C2=A0</div=
><div><br></div><div>best</div><div><br></div><div>Jiazi=C2=A0</div></div><=
div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, Jun 4, 201=
6 at 9:04 AM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:=
christopher.dearlove@gmail.com" target=3D"_blank">christopher.dearlove@gmai=
l.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"a=
uto"><div>Actually, as I should have thought earlier, what&#39;s the use of=
 advertising just the source route TLV?</div><div><br></div><div>A router t=
hat doesn&#39;t advertise any neighbours in TC messages can&#39;t be an int=
ermediate router on a route. (Exception for two hop routes constructed usin=
g HELLO messages, but those should only be transient.)</div><div><br></div>=
<div>So what&#39;s the use case for this feature?<span><font color=3D"#8888=
88"><br><br>--=C2=A0<div>Christopher Dearlove</div></font></span></div><spa=
n><div><br>On 3 Jun 2016, at 21:25, Jiazi YI &lt;<a href=3D"mailto:ietf@jia=
ziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div></=
span><div><div><blockquote type=3D"cite"><div><div dir=3D"ltr"><br><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jun 2, 2016 at 10=
:45 AM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a href=3D"mailto:=
chris.dearlove@baesystems.com" target=3D"_blank">chris.dearlove@baesystems.=
com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">OK, if the purpose is jus=
t to advertise SOURCE_ROUTE TLV, then perhaps some guidance on what it shou=
ld advertise as neighbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think if advertising at=
 a slower rate, advertising any addresses either gets into the trap I descr=
ibed, or alternatively advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I think what you want is =
something like (this is not actual suggested words) if SR_TC_INTERVAL is mu=
ch greater than TC_INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mes=
sage SHOULD NOT report any addresses [unless the links are known to be exce=
ptionally stable] - the bit in [] could be included or excluded. It=E2=80=
=99s basically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local lin=
k information, supplied by neighbour, plus local knowledge. But that may be=
 too much detail to go into.</span></p></div></div></blockquote><div><br></=
div><div>Is it necessary to specify that the router &quot;SHOULD NOT report=
 addresses&quot; in this case? I think it will be an &quot;empty&quot; TC m=
essage anyways? Because if a router doesn&#39;t generate TC message with TC=
_INTERVAL, it generally means that there is no link to report.=C2=A0</div><=
div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" value=3D"+441245242194" tar=
get=3D"_blank">+44 (0)1245 242194</a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10=
.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b=
><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&qu=
ot;,&quot;sans-serif&quot;"> <a href=3D"mailto:yi.jiazi@gmail.com" target=
=3D"_blank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"mailto:yi.jiazi@gmail=
.com" target=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finis=
hed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quo=
t;;color:black"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<u></u><u></u></span><=
/b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><u></u><u>=
</u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christophe=
r (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blan=
k">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I will at some point find=
 my editorial comments.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">While the below is genera=
lly as discussed, I don=E2=80=99t think the SR_TC_INTERVAL point captures a=
ll of
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the lon=
ger SR_TC_INTERVAL doesn&#39;t imply that the related links have longer val=
idity time. All the MP-OLSR routers have to generate TC messages as require=
d by OLSR.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to =
advertise SOURCE_ROUTE TLV (so that the other routers can learn that the or=
iginators support source routing), in case they are not required to generat=
e TC messages.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">We have some routers putt=
ing out infrequent TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chose=
n by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">(Example, four routers in=
 a square, all sides are links, diagonals are not. Each will pick one neigh=
bour
 as an MPR. Each link will have a 1/2 chance of being advertised in each di=
rection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">So why can we accept some=
 links having long durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short =
initial value or a short minimum interval.) If not, then consider a non-MP =
router. To it, those are just links like any other. And may have long valid=
ity time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You note simulations done=
. But what simulations have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not overs=
hort, and scenarios/density where there are MP routers not picked as MPRs? =
Because that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07e7e">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#bebebe">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007e"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7d7d7d">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7d7d7d">: =C2=
=A0<a href=3D"tel:%2B44%20%280%291245%20242194" target=3D"_blank">+44 (0)12=
45 242194</a>
 =C2=A0| =C2=A0<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007e"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3a8b92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:#3a8b92">www.baesystems.com/ai</span></a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3a8b92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3a8b9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:b=
lack">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white">
<b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;;color:#333972">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
g><em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,&quot;sans-serif&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
 you feel the email is suspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><u></u><u></u></p>
</div>
</div>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt=
">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stro=
ng><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside ou=
r organization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">.</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span><blockquote type=3D"cite"><div><span>_=
______________________________________________</span><br><span>manet mailin=
g list</span><br><span><a href=3D"mailto:manet@ietf.org" target=3D"_blank">=
manet@ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/mailman/=
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et</a></span><br></div></blockquote></span></div></blockquote></div><br></d=
iv>
</div></blockquote></div></div></div></blockquote></div><br></div></div>
</div></blockquote></div></div></div></blockquote></div><br></div></div>

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From: Jiazi YI <ietf@jiaziyi.com>
Date: Sun, 5 Jun 2016 11:52:38 +0200
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To: Christopher Dearlove <christopher.dearlove@gmail.com>
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Subject: Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
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Here is the text that we proposed:

TC message are generated according to the Section 16.1 of [RFC7181]. As
least one TC message MUST be generated by an MP-OLSRv2 Routing Process
during SR_TC_INTERVAL. Please note that the TC message generation based on
SR_TC_INTERVAL does not replace the ordinary TC message generation
specified in [RFC7181] and does not carry any address. This is due to the
fact that not all routers will generate TC messages based on OLSRv2. The TC
generation based on SR_TC_INTERVAL serves for those routers to advertise
SOURCE_ROUTE TLV so that the other routers can be aware of the source-route
enabled routers so as to be used as destinations of multipath routing. The
SR_TC_INTERVAL is normally set to a longer value than TC_INTERVAL.

I aslo have a -09alpha revision attached. We will submit a new revision
soon. If there are any further comments, please let us know.

regards

Jiazi

On Sun, Jun 5, 2016 at 1:16 AM, Jiazi YI <ietf@jiaziyi.com> wrote:

>
> On Sun, Jun 5, 2016 at 12:53 AM, Christopher Dearlove <
> christopher.dearlove@gmail.com> wrote:
>
>> There we need to know what behaviour is. But there's no need for the
>> destination to care - the packet is for it, it's not being forwarded, wh=
o
>> cares if there's a source routing header or not? Or at least that's a
>> sensible way to implement. What do real implementations do?
>>
>
> It's *possible* that the destination doesn't understand the source routin=
g
> header and dropped it directly. It really depends on the implementation. =
To
> make sure that the packet is delivered, we use multipath only to the
> SRC_ROUTE supported routers -- or else, falling back to single path.
>
>
>
>>
>> But that's an aside from the point I made about indicating about not
>> advertising neighbours. Which you challenged, but I think are now
>> indicating you can see why.
>>
>> In fact I think I understated it.
>>
>> Advertising addresses in such a TC message is almost never of any use.
>> Almost never? If other routers only advertise MPR selectors, never usefu=
l.
>> If they might advertise other links, possibly useful. Except likely
>> damaging if with a significantly longer interval.
>>
>> Which reinforces an earlier made point that discussing advertised links
>> is something this draft should do, and doesn't. In addition to these ext=
ra
>> TC messages not advertising links if at a significantly longer interval.
>>
>
> We will add some text about that.
>
> best
>
> Jiazi
>
>
>>
>> --
>> Christopher Dearlove
>>
>> On 4 Jun 2016, at 23:39, Jiazi YI <ietf@jiaziyi.com> wrote:
>>
>>
>>
>> On Sun, Jun 5, 2016 at 12:23 AM, Christopher Dearlove <
>> chris@mnemosyne.demon.co.uk> wrote:
>>
>>> Being advertised in other routers' messages doesn't help - you need to
>>> look at the directionality of the links, links in TC messages are outgo=
ing,
>>> not incoming.
>>>
>>> If you need to know destinations are MP that's another matter. But why?
>>> All a destination needs to do is receive packets.
>>>
>>
>> There is a source routing header in the packets, the destination needs t=
o
>> know how to deal with it. Or else, the behaviour would be unpredictable.
>>
>>
>>>
>>> However suppose that it is needed, no need to advertise other addresses=
.
>>> Which is back at the point I was making about not advertising other
>>> addresses. Not needed, even harmful, in the cases I indicated.
>>>
>>
>> I would agree with not advertising other addresses.
>>
>> Jiazi
>>
>>
>>>
>>>
>>> --
>>> Christopher Dearlove
>>>
>>> On 4 Jun 2016, at 21:15, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>
>>> As long as a router has more than two neighbors in the "topology graph"
>>> constructed, it can be an intermediate router on a route, right?
>>>
>>> An MP-OLSR router that doesn't advertise any neighbors in its own TC
>>> message will be advertised in other router's (or routers') TC messages.
>>> Of course, the router receiving such TC messages won't be able to know
>>> the neighbors are MP-OLSR enabled or not.
>>> Having the MP-OLSR originating TC message carrying the SRC_ROUTE TLV ca=
n
>>> provide such information.
>>>
>>> Other than being intermediate routers, it's important to know a
>>> destination is MP-OLSR enabled, if we want to use multi-path routing to
>>> such destination.
>>>
>>> best
>>>
>>> Jiazi
>>>
>>> On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <
>>> christopher.dearlove@gmail.com> wrote:
>>>
>>>> Actually, as I should have thought earlier, what's the use of
>>>> advertising just the source route TLV?
>>>>
>>>> A router that doesn't advertise any neighbours in TC messages can't be
>>>> an intermediate router on a route. (Exception for two hop routes
>>>> constructed using HELLO messages, but those should only be transient.)
>>>>
>>>> So what's the use case for this feature?
>>>>
>>>> --
>>>> Christopher Dearlove
>>>>
>>>> On 3 Jun 2016, at 21:25, Jiazi YI <ietf@jiaziyi.com> wrote:
>>>>
>>>>
>>>>
>>>> On Thu, Jun 2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <
>>>> chris.dearlove@baesystems.com> wrote:
>>>>
>>>>> OK, if the purpose is just to advertise SOURCE_ROUTE TLV, then perhap=
s
>>>>> some guidance on what it should advertise as neighbours.
>>>>>
>>>>>
>>>>>
>>>>> I think if advertising at a slower rate, advertising any addresses
>>>>> either gets into the trap I described, or alternatively advertised wi=
th a
>>>>> short validity time then those links will be transient, which is a ba=
d idea.
>>>>>
>>>>>
>>>>>
>>>>> I think what you want is something like (this is not actual suggested
>>>>> words) if SR_TC_INTERVAL is much greater than TC_INTERVAL (someone wi=
ll
>>>>> nitpick over much greater, so perhaps in terms of the appropriate hol=
d
>>>>> time) then the TC message SHOULD NOT report any addresses [unless the=
 links
>>>>> are known to be exceptionally stable] - the bit in [] could be includ=
ed or
>>>>> excluded. It=E2=80=99s basically an indication of when the SHOULD NOT=
 can be broken
>>>>> sensibly. Known to be stable can be taken from local link information=
,
>>>>> supplied by neighbour, plus local knowledge. But that may be too much
>>>>> detail to go into.
>>>>>
>>>>
>>>> Is it necessary to specify that the router "SHOULD NOT report
>>>> addresses" in this case? I think it will be an "empty" TC message anyw=
ays?
>>>> Because if a router doesn't generate TC message with TC_INTERVAL, it
>>>> generally means that there is no link to report.
>>>>
>>>> Jiazi
>>>>
>>>>
>>>>>
>>>>>
>>>>> *-- *
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>>>> Intelligence Laboratories *
>>>>> *____________________________________________________________________=
______
>>>>> *
>>>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>>>
>>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>>>> Baddow, Chelmsford, Essex CM2 8HN.
>>>>> www.baesystems.com/ai
>>>>>
>>>>> BAE Systems Applied Intelligence Limited
>>>>> Registered in England & Wales No: 01337451
>>>>>
>>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>>
>>>>>
>>>>>
>>>>> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com] *On Behalf Of =
*Jiazi
>>>>> YI
>>>>> *Sent:* 01 June 2016 21:59
>>>>> *To:* Dearlove, Christopher (UK)
>>>>> *Cc:* manet
>>>>> *Subject:* Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC
>>>>> finished
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> **** WARNING ****
>>>>>
>>>>> *This message originates from outside our organisation, either from a=
n
>>>>> external partner or the internet.*
>>>>>
>>>>> * Consider carefully whether you should click on any links, open any
>>>>> attachments or reply. For information regarding **Red Flags** that
>>>>> you can look out for in emails you receive, click here
>>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Doc=
uments/Red%20Flags.pdf>.*
>>>>> * If you feel the email is suspicious, please follow this process
>>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Doc=
uments/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>>>
>>>>> Hi Chris,
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christopher (UK) <
>>>>> chris.dearlove@baesystems.com> wrote:
>>>>>
>>>>> I will at some point find my editorial comments.
>>>>>
>>>>>
>>>>>
>>>>> Thanks very much.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> While the below is generally as discussed, I don=E2=80=99t think the
>>>>> SR_TC_INTERVAL point captures all of my concern.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> In fact, as I mentioned in my previous post, the longer SR_TC_INTERVA=
L
>>>>> doesn't imply that the related links have longer validity time. All t=
he
>>>>> MP-OLSR routers have to generate TC messages as required by OLSR.
>>>>>
>>>>>
>>>>>
>>>>> The SR_TC_INTERVAL is mainly for MP-OLSR routers to advertise
>>>>> SOURCE_ROUTE TLV (so that the other routers can learn that the origin=
ators
>>>>> support source routing), in case they are not required to generate TC
>>>>> messages.
>>>>>
>>>>>
>>>>>
>>>>> best
>>>>>
>>>>>
>>>>>
>>>>> Jiazi
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> We have some routers putting out infrequent TCs. This must mean they
>>>>> have long validity times. But there is nothing inherently different a=
bout
>>>>> those links, they can be chosen by pot luck.
>>>>>
>>>>>
>>>>>
>>>>> (Example, four routers in a square, all sides are links, diagonals ar=
e
>>>>> not. Each will pick one neighbour as an MPR. Each link will have a 1/=
2
>>>>> chance of being advertised in each direction, all else being equal.)
>>>>>
>>>>>
>>>>>
>>>>> So why can we accept some links having long durations? If any link
>>>>> could, then why not have a long TC_INTERVAL everywhere? (If worried a=
bout
>>>>> convergence, set either a short initial value or a short minimum inte=
rval.)
>>>>> If not, then consider a non-MP router. To it, those are just links li=
ke any
>>>>> other. And may have long validity time but short useful lifetime (tha=
t=E2=80=99s
>>>>> the situation we=E2=80=99ve reached here). Which is bad.
>>>>>
>>>>>
>>>>>
>>>>> You note simulations done. But what simulations have been done on
>>>>> scenarios with mixed MP and non-MP routers, mobility such that basic
>>>>> TC_INTERVAL is appropriate but not overshort, and scenarios/density w=
here
>>>>> there are MP routers not picked as MPRs? Because that=E2=80=99s the p=
roblem case
>>>>> here.
>>>>>
>>>>>
>>>>>
>>>>> *-- *
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
>>>>> Intelligence Laboratories *
>>>>> *____________________________________________________________________=
______
>>>>> *
>>>>> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>>>>>
>>>>> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
>>>>> Baddow, Chelmsford, Essex CM2 8HN.
>>>>> www.baesystems.com/ai
>>>>>
>>>>> BAE Systems Applied Intelligence Limited
>>>>> Registered in England & Wales No: 01337451
>>>>>
>>>>> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>>>>>
>>>>>
>>>>>
>>>>> *From:* manet [mailto:manet-bounces@ietf.org] *On Behalf Of *Jiazi YI
>>>>> *Sent:* 30 May 2016 22:25
>>>>> *To:* manet
>>>>> *Subject:* [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> **** WARNING ****
>>>>>
>>>>> *This message originates from outside our organisation, either from a=
n
>>>>> external partner or the internet.*
>>>>>
>>>>> * Consider carefully whether you should click on any links, open any
>>>>> attachments or reply. For information regarding **Red Flags** that
>>>>> you can look out for in emails you receive, click here
>>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Doc=
uments/Red%20Flags.pdf>.*
>>>>> * If you feel the email is suspicious, please follow this process
>>>>> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Doc=
uments/Dealing%20With%20Suspicious%20Emails.pdf>.*
>>>>>
>>>>> **** **WARNING ******
>>>>> EXTERNAL EMAIL -- This message originates from outside our organizati=
on
>>>>> .
>>>>>
>>>>>
>>>>>
>>>>> Hi all,
>>>>>
>>>>>
>>>>>
>>>>> The WGLC of draft-ietf-manet-olsrv2-multipath-08 has finished. We got
>>>>> valuable comments from Chris -- thanks very much!
>>>>>
>>>>>
>>>>>
>>>>> Based on the comments received, a new revision will be submitted soon
>>>>> with following updates:
>>>>>
>>>>>
>>>>>
>>>>>    - Make the style more consistent with other OLSRv2-RFC suite.
>>>>>
>>>>>
>>>>>
>>>>>    - Make the reactive multipath calculation optional. Both proactive
>>>>> and reactive calculation can be used. Such modification won't impact
>>>>> interoperability.
>>>>>
>>>>>
>>>>>
>>>>>    - Clarify the use of SR_TC_INTERVAL.
>>>>>
>>>>>
>>>>>
>>>>>    - Clarify the generation/update of Multi-path routing Set (this is
>>>>> related to reactive/proactive calculation also)
>>>>>
>>>>>
>>>>>
>>>>>    - Clarify the use of fp and fe in the multipath Dijkstra algorithm
>>>>>
>>>>>
>>>>>
>>>>>    - Chris raised the concern about impact partial topology map on
>>>>> multipath calculation. As indicated in
>>>>> https://www.ietf.org/mail-archive/web/manet/current/msg19038.html ,
>>>>> with non-trival amount of studies performed, no issue related to this=
 has
>>>>> been reported yet. As it's related to the MPR-selection algorithm use=
d, we
>>>>> can put it as one of the experimental points to make people pay atten=
tion
>>>>> to it, so that new issues can be reported.
>>>>>
>>>>>
>>>>>
>>>>> regards
>>>>>
>>>>>
>>>>>
>>>>> Jiazi
>>>>>
>>>>> ********************************************************************
>>>>> This email and any attachments are confidential to the intended
>>>>> recipient and may also be privileged. If you are not the intended
>>>>> recipient please delete it from your system and notify the sender.
>>>>> You should not copy it or use it for any purpose nor disclose or
>>>>> distribute its contents to any other person.
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>>>>>
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>>>>>
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>

--001a114128209d05dd053484ea45
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Here is the text that we proposed:<div><br></div><div>TC m=
essage are generated according to the Section 16.1 of [RFC7181]. As least o=
ne TC message MUST be generated by an MP-OLSRv2 Routing Process during SR_T=
C_INTERVAL. Please note that the TC message generation based on SR_TC_INTER=
VAL does not replace the ordinary TC message generation specified in [RFC71=
81] and does not carry any address. This is due to the fact that not all ro=
uters will generate TC messages based on OLSRv2. The TC generation based on=
 SR_TC_INTERVAL serves for those routers to advertise SOURCE_ROUTE TLV so t=
hat the other routers can be aware of the source-route enabled routers so a=
s to be used as destinations of multipath routing. The SR_TC_INTERVAL is no=
rmally set to a longer value than TC_INTERVAL.</div><div><br></div><div>I a=
slo have a -09alpha revision attached. We will submit a new revision soon. =
If there are any further comments, please let us know.=C2=A0</div><div><br>=
</div><div>regards</div><div><br></div><div>Jiazi</div><div><div class=3D"g=
mail_extra"><br><div class=3D"gmail_quote">On Sun, Jun 5, 2016 at 1:16 AM, =
Jiazi YI <span dir=3D"ltr">&lt;<a href=3D"mailto:ietf@jiaziyi.com" target=
=3D"_blank">ietf@jiaziyi.com</a>&gt;</span> wrote:<br><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border=
-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div=
 dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote"><spa=
n class=3D"">On Sun, Jun 5, 2016 at 12:53 AM, Christopher Dearlove <span di=
r=3D"ltr">&lt;<a href=3D"mailto:christopher.dearlove@gmail.com" target=3D"_=
blank">christopher.dearlove@gmail.com</a>&gt;</span> wrote:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1=
px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:=
1ex"><div dir=3D"auto"><div>There we need to know what behaviour is. But th=
ere&#39;s no need for the destination to care - the packet is for it, it&#3=
9;s not being forwarded, who cares if there&#39;s a source routing header o=
r not? Or at least that&#39;s a sensible way to implement. What do real imp=
lementations do?</div></div></blockquote><div><br></div></span><div>It&#39;=
s *possible* that the destination doesn&#39;t understand the source routing=
 header and dropped it directly. It really depends on the implementation. T=
o make sure that the packet is delivered, we use multipath only to the SRC_=
ROUTE supported routers -- or else, falling back to single path.=C2=A0</div=
><span class=3D""><div><br></div><div>=C2=A0</div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-lef=
t-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir=
=3D"auto"><div><br></div><div>But that&#39;s an aside from the point I made=
 about indicating about not advertising neighbours. Which you challenged, b=
ut I think are now indicating you can see why.</div><div><br></div><div>In =
fact I think I understated it.=C2=A0</div><div><br></div><div>Advertising a=
ddresses in such a TC message is almost never of any use. Almost never? If =
other routers only advertise MPR selectors, never useful. If they might adv=
ertise other links, possibly useful. Except likely damaging if with a signi=
ficantly longer interval.</div><div><br></div><div>Which reinforces an earl=
ier made point that discussing advertised links is something this draft sho=
uld do, and doesn&#39;t. In addition to these extra TC messages not adverti=
sing links if at a significantly longer interval.</div></div></blockquote><=
div><br></div></span><div>We will add some text about that.=C2=A0</div><div=
><br></div><div>best</div><div><div class=3D"h5"><div><br></div><div>Jiazi<=
/div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);bor=
der-left-style:solid;padding-left:1ex"><div dir=3D"auto"><div><br>-- =C2=A0=
<span><font color=3D"#888888"><div>Christopher Dearlove</div></font></span>=
</div><div><div><div><br>On 4 Jun 2016, at 23:39, Jiazi YI &lt;<a href=3D"m=
ailto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<b=
r><br></div><blockquote type=3D"cite"><div><div dir=3D"ltr"><div><br></div>=
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Jun 5, 20=
16 at 12:23 AM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailt=
o:chris@mnemosyne.demon.co.uk" target=3D"_blank">chris@mnemosyne.demon.co.u=
k</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204=
);border-left-style:solid;padding-left:1ex"><div dir=3D"auto"><div>Being ad=
vertised in other routers&#39; messages doesn&#39;t help - you need to look=
 at the directionality of the links, links in TC messages are outgoing, not=
 incoming.</div><div><br></div><div>If you need to know destinations are MP=
 that&#39;s another matter. But why? All a destination needs to do is recei=
ve packets.</div></div></blockquote><div><br></div><div>There is a source r=
outing header in the packets, the destination needs to know how to deal wit=
h it. Or else, the behaviour would be unpredictable.=C2=A0</div><div>=C2=A0=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:s=
olid;padding-left:1ex"><div dir=3D"auto"><div><br></div><div>However suppos=
e that it is needed, no need to advertise other addresses. Which is back at=
 the point I was making about not advertising other addresses. Not needed, =
even harmful, in the cases I indicated.</div></div></blockquote><div><br></=
div><div>I would agree with not advertising other addresses.=C2=A0</div><di=
v><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-col=
or:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir=3D"a=
uto"><div><span><font color=3D"#888888"><br><br>--=C2=A0<div>Christopher De=
arlove</div></font></span></div><div><div><div><br>On 4 Jun 2016, at 21:15,=
 Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" target=3D"_blank">ietf@ji=
aziyi.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><div><div d=
ir=3D"ltr">As long as a router has more than two neighbors in the &quot;top=
ology graph&quot; constructed, it can be an intermediate router on a route,=
 right?<div><br></div><div>An MP-OLSR router that doesn&#39;t advertise any=
 neighbors in its own TC message will be advertised in other router&#39;s (=
or routers&#39;) TC messages.=C2=A0</div><div>Of course, the router receivi=
ng such TC messages won&#39;t be able to know the neighbors are MP-OLSR ena=
bled or not.=C2=A0</div><div>Having the MP-OLSR originating TC message carr=
ying the SRC_ROUTE TLV can provide such information.=C2=A0</div><div><br></=
div><div>Other than being intermediate routers, it&#39;s important to know =
a destination is MP-OLSR enabled, if we want to use multi-path routing to s=
uch destination.=C2=A0</div><div><br></div><div>best</div><div><br></div><d=
iv>Jiazi=C2=A0</div></div><div class=3D"gmail_extra"><br><div class=3D"gmai=
l_quote">On Sat, Jun 4, 2016 at 9:04 AM, Christopher Dearlove <span dir=3D"=
ltr">&lt;<a href=3D"mailto:christopher.dearlove@gmail.com" target=3D"_blank=
">christopher.dearlove@gmail.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;bo=
rder-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">=
<div dir=3D"auto"><div>Actually, as I should have thought earlier, what&#39=
;s the use of advertising just the source route TLV?</div><div><br></div><d=
iv>A router that doesn&#39;t advertise any neighbours in TC messages can&#3=
9;t be an intermediate router on a route. (Exception for two hop routes con=
structed using HELLO messages, but those should only be transient.)</div><d=
iv><br></div><div>So what&#39;s the use case for this feature?<span><font c=
olor=3D"#888888"><br><br>--=C2=A0<div>Christopher Dearlove</div></font></sp=
an></div><span><div><br>On 3 Jun 2016, at 21:25, Jiazi YI &lt;<a href=3D"ma=
ilto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br=
><br></div></span><div><div><blockquote type=3D"cite"><div><div dir=3D"ltr"=
><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jun =
2, 2016 at 10:45 AM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris.dearlov=
e@baesystems.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:=
rgb(204,204,204);border-left-style:solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">OK, if the purpose is just to advertise SOUR=
CE_ROUTE TLV, then perhaps some guidance on what it should advertise as nei=
ghbours.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I think if advertising at a slower rate, adv=
ertising any addresses either gets into the trap I described, or alternativ=
ely advertised with a short validity
 time then those links will be transient, which is a bad idea.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I think what you want is something like (thi=
s is not actual suggested words) if SR_TC_INTERVAL is much greater than TC_=
INTERVAL (someone will nitpick over much
 greater, so perhaps in terms of the appropriate hold time) then the TC mes=
sage SHOULD NOT report any addresses [unless the links are known to be exce=
ptionally stable] - the bit in [] could be included or excluded. It=E2=80=
=99s basically an indication of when the SHOULD
 NOT can be broken sensibly. Known to be stable can be taken from local lin=
k information, supplied by neighbour, plus local knowledge. But that may be=
 too much detail to go into.</span></p></div></div></blockquote><div><br></=
div><div>Is it necessary to specify that the router &quot;SHOULD NOT report=
 addresses&quot; in this case? I think it will be an &quot;empty&quot; TC m=
essage anyways? Because if a router doesn&#39;t generate TC message with TC=
_INTERVAL, it generally means that there is no link to report.=C2=A0</div><=
div><br></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-c=
olor:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=
=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoNormal"><span=
 style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)"><u></u><u></u></span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" value=3D"+441245242194" target=3D"_blank">+44 (0)1245 242194<=
/a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10=
pt;font-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" styl=
e=3D"font-size:10pt;font-family:Tahoma,sans-serif"> <a href=3D"mailto:yi.ji=
azi@gmail.com" target=3D"_blank">yi.jiazi@gmail.com</a> [mailto:<a href=3D"=
mailto:yi.jiazi@gmail.com" target=3D"_blank">yi.jiazi@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 01 June 2016 21:59<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet<br>
<b>Subject:</b> Re: [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finis=
hed<u></u><u></u></span></p><div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><span style=3D"font-family:Arial,sans-serif;color:black"><u=
></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><b><span style=3D"font-size:15pt;font-family:Arial,sans-ser=
if;color:rgb(51,57,114)">*** WARNING ***<u></u><u></u></span></b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background-color:white">
<em><span style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(=
51,57,114)">This message originates from outside our organisation, either f=
rom an external partner or the internet.</span></em><i><span style=3D"font-=
size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
 you should click on any links, open any attachments or reply.</span></em><=
br>
<em><span style=3D"font-family:Arial,sans-serif">For information regarding =
</span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:Aria=
l,sans-serif;color:red">Red Flags</span></i></strong><em><span style=3D"fon=
t-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"> that you =
can look out for in emails you receive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:Arial,s=
ans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">If you feel the email is s=
uspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:Arial,sans-serif;color:rgb(51,57,114)"><u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">Hi Chris,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 1, 2016 at 4:21 PM, Dearlove, Christophe=
r (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blan=
k">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I will at some point find my editorial comme=
nts.</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks very much.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">While the below is generally as discussed, I=
 don=E2=80=99t think the SR_TC_INTERVAL point captures all of
 my concern.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In fact, as I mentioned in my previous post, the lon=
ger SR_TC_INTERVAL doesn&#39;t imply that the related links have longer val=
idity time. All the MP-OLSR routers have to generate TC messages as require=
d by OLSR.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The SR_TC_INTERVAL is mainly for MP-OLSR routers to =
advertise SOURCE_ROUTE TLV (so that the other routers can learn that the or=
iginators support source routing), in case they are not required to generat=
e TC messages.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">We have some routers putting out infrequent =
TCs. This must mean they have long validity times. But
 there is nothing inherently different about those links, they can be chose=
n by pot luck.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">(Example, four routers in a square, all side=
s are links, diagonals are not. Each will pick one neighbour
 as an MPR. Each link will have a 1/2 chance of being advertised in each di=
rection, all else being equal.)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">So why can we accept some links having long =
durations? If any link could, then why not have a long
 TC_INTERVAL everywhere? (If worried about convergence, set either a short =
initial value or a short minimum interval.) If not, then consider a non-MP =
router. To it, those are just links like any other. And may have long valid=
ity time but short useful lifetime
 (that=E2=80=99s the situation we=E2=80=99ve reached here). Which is bad.</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">You note simulations done. But what simulati=
ons have been done on scenarios with mixed MP and non-MP
 routers, mobility such that basic TC_INTERVAL is appropriate but not overs=
hort, and scenarios/density where there are MP routers not picked as MPRs? =
Because that=E2=80=99s the problem case here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
</span></b><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" target=3D"_blank">+44 (0)1245 242194</a>
 =C2=A0| =C2=A0<b>E: </b><a href=3D"mailto:chris.dearlove@baesystems.com" t=
arget=3D"_blank">chris.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a></span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;font=
-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"fo=
nt-size:10pt;font-family:Tahoma,sans-serif"> manet
 [mailto:<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank">manet-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 30 May 2016 22:25<br>
<b>To:</b> manet<br>
<b>Subject:</b> [manet] draft-ietf-manet-olsrv2-multipath-08 WGLC finished<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white">
<span style=3D"font-family:Arial,sans-serif;color:black">=C2=A0</span><u></=
u><u></u></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white">
<b><span style=3D"font-size:15pt;font-family:Arial,sans-serif;color:rgb(51,=
57,114)">*** WARNING ***</span></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background-color:white">
<em><span style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(=
51,57,114)">This message originates from outside our organisation, either f=
rom an external partner or the internet.</span></em><i><span style=3D"font-=
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<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
 you should click on any links, open any attachments or reply.</span></em><=
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</div>
</div>
<div>
<div style=3D"border:1pt solid windowtext;padding:1pt 4pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<span style=3D"font-family:Arial,sans-serif">*<strong><span style=3D"font-f=
amily:Arial,sans-serif">**
</span></strong></span><strong><span style=3D"font-size:10pt;font-family:Ar=
ial,sans-serif">WARNING
</span></strong><strong><span style=3D"font-family:Arial,sans-serif">***</s=
pan></strong><span style=3D"font-size:8.5pt;font-family:Arial,sans-serif"><=
br>
</span><span style=3D"font-size:10pt;font-family:Arial,sans-serif">EXTERNAL=
 EMAIL -- This message originates from outside our organization</span><span=
 style=3D"font-size:8.5pt;font-family:Arial,sans-serif">.</span><u></u><u><=
/u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi all,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The WGLC of draft-ietf-manet-olsrv2-multipath-08 has=
 finished. We got valuable comments from Chris -- thanks very much!<u></u><=
u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Based on the comments received, a new revision will =
be submitted soon with following updates:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the style more consistent with o=
ther OLSRv2-RFC suite.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Make the reactive multipath calculati=
on optional. Both proactive and reactive calculation can be used. Such modi=
fication won&#39;t impact interoperability.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of SR_TC_INTERVAL.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the generation/update of Mult=
i-path routing Set (this is related to reactive/proactive calculation also)=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Clarify the use of fp and fe in the m=
ultipath Dijkstra algorithm<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0- Chris raised the concern about impact=
 partial topology map on multipath calculation. As indicated in=C2=A0<a hre=
f=3D"https://www.ietf.org/mail-archive/web/manet/current/msg19038.html" tar=
get=3D"_blank">https://www.ietf.org/mail-archive/web/manet/current/msg19038=
.html</a>
 , with non-trival amount of studies performed, no issue related to this ha=
s been reported yet. As it&#39;s related to the MPR-selection algorithm use=
d, we can put it as one of the experimental points to make people pay atten=
tion to it, so that new issues can be
 reported.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p>********************************************************************<br>
This email and any attachments are confidential to the intended<br>
recipient and may also be privileged. If you are not the intended<br>
recipient please delete it from your system and notify the sender.<br>
You should not copy it or use it for any purpose nor disclose or<br>
distribute its contents to any other person.<br>
********************************************************************<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div></div>
</div></blockquote></div></div><span><blockquote type=3D"cite"><div><span>_=
______________________________________________</span><br><span>manet mailin=
g list</span><br><span><a href=3D"mailto:manet@ietf.org" target=3D"_blank">=
manet@ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/mailman/=
listinfo/manet" target=3D"_blank">https://www.ietf.org/mailman/listinfo/man=
et</a></span><br></div></blockquote></span></div></blockquote></div><br></d=
iv>
</div></blockquote></div></div></div></blockquote></div><br></div></div>
</div></blockquote></div></div></div></blockquote></div></div></div><br></d=
iv></div>
</blockquote></div><br></div></div></div>

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From nobody Mon Jun  6 15:01:27 2016
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Cc: manet-chairs@ietf.org, chris.dearlove@baesystems.com, manet@ietf.org, The IESG <iesg@ietf.org>, rfc-editor@rfc-editor.org, draft-ietf-manet-rfc6779bis@ietf.org
Subject: [manet] Protocol Action: 'Definition of Managed Objects for the Neighborhood Discovery Protocol' to Proposed Standard (draft-ietf-manet-rfc6779bis-07.txt)
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The IESG has approved the following document:
- 'Definition of Managed Objects for the Neighborhood Discovery Protocol'
  (draft-ietf-manet-rfc6779bis-07.txt) as Proposed Standard

This document is the product of the Mobile Ad-hoc Networks Working Group.

The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah
Brungard.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-manet-rfc6779bis/





Technical Summary

  This document revises, extends, and replaces RFC 6779, which defined
  the NHDP (RFC6130) related portion of the Management Information Base
  (MIB) for use with network management protocols in the Internet community.
  This revision is needed by the update to RFC6130 specified in draft-ietf-manet-nhdp-optimization.

Working Group Summary

   Nothing special to note.

Document Quality

   There is at least one implementation of NHDP-MIB that has 
   been updated according to this specification.  A MIB Doctor 
   has reviewed this document.

Personnel

   Document shepherd: Christopher Dearlove.
   Responsible Area Director is:  Alvaro Retana.


From nobody Wed Jun  8 15:17:23 2016
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Subject: [manet] I-D Action: draft-ietf-manet-olsrv2-multipath-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Mobile Ad-hoc Networks of the IETF.

        Title           : Multi-path Extension for the Optimized Link State Routing Protocol version 2 (OLSRv2)
        Authors         : Jiazi Yi
                          Benoit Parrein
	Filename        : draft-ietf-manet-olsrv2-multipath-09.txt
	Pages           : 23
	Date            : 2016-06-08

Abstract:
   This document specifies a multi-path extension for the Optimized Link
   State Routing Protocol version 2 (OLSRv2) to discover multiple
   disjoint paths, so as to improve reliability of the OLSRv2 protocol.
   The interoperability with OLSRv2 is retained.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-multipath/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-manet-olsrv2-multipath-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-manet-olsrv2-multipath-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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


From nobody Wed Jun  8 15:56:44 2016
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From: Ulrich Herberg <ulrich@herberg.name>
Date: Wed, 8 Jun 2016 15:56:40 -0700
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Subject: Re: [manet] WGLC request for draft-ietf-manet-olsrv2-sec-threats-02
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(admittedly biased as author), I am also in favor of starting a WGLC.

Best regards
Ulrich

On Tue, May 31, 2016 at 1:38 PM, Thomas Clausen <ietf@thomasclausen.org> wrote:
>
> On 31 mai 2016, at 21:43, Jiazi YI <ietf@jiaziyi.com> wrote:
>
> Hi,
>
> We submitted a new revision of draft-ietf-manet-olsrv2-sec-threats at the
> begin of May. The authors believe that the document is ready for WGLC.
>
> We would like to ask the WG chairs for a WGLC on the document.
>
>
> +1
>
> Other recently-WGLCed documents are either forwarded to the AD, or are
> returned to the authors for a revision, so a WGLC of this document would
> seem a good way of "keeping the pipeline moving".
>
> Best,
>
> Thomas
>
>
> Here is the link to the draft:
> https://tools.ietf.org/html/draft-ietf-manet-olsrv2-sec-threats-02 .
> It tends for informational track.
>
> regards
>
> Jiazi
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>


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From: Stan Ratliff <ratliffstan@gmail.com>
Date: Wed, 8 Jun 2016 22:51:08 -0400
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Subject: [manet] Fwd: Fwd: I-D Action: draft-ietf-manet-olsrv2-multipath-09.txt
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--001a114417fe84f41b0534cf7efd
Content-Type: text/plain; charset=UTF-8

Hello MANET WG participants,

First off, thanks to Chris Dearlove for his input, and also thanks to Jiazi
and Benoit for working on getting the document updated.

Since there was quite a bit changed, Justin and myself feel it appropriate
to give the WG 1 week, ending on June 15, as another WGLC. Please review
and comment.

Regards,
Stan

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: Thu, Jun 9, 2016 at 12:17 AM
Subject: [manet] I-D Action: draft-ietf-manet-olsrv2-multipath-09.txt
To: i-d-announce@ietf.org
Cc: manet@ietf.org



A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Mobile Ad-hoc Networks of the IETF.

        Title           : Multi-path Extension for the Optimized Link State
Routing Protocol version 2 (OLSRv2)
        Authors         : Jiazi Yi
                          Benoit Parrein
        Filename        : draft-ietf-manet-olsrv2-multipath-09.txt
        Pages           : 23
        Date            : 2016-06-08

Abstract:
   This document specifies a multi-path extension for the Optimized Link
   State Routing Protocol version 2 (OLSRv2) to discover multiple
   disjoint paths, so as to improve reliability of the OLSRv2 protocol.
   The interoperability with OLSRv2 is retained.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-multipath/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-manet-olsrv2-multipath-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-manet-olsrv2-multipath-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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

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

--001a114417fe84f41b0534cf7efd
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><br><div class=3D"gmail_quote">Hello MANET WG participants=
, <br><br></div><div class=3D"gmail_quote">First off, thanks to Chris Dearl=
ove for his input, and also thanks to Jiazi and Benoit for working on getti=
ng the document updated. <br><br></div><div class=3D"gmail_quote">Since the=
re was quite a bit changed, Justin and myself feel it appropriate to give t=
he WG 1 week, ending on June 15, as another WGLC. Please review and comment=
. <br><br></div><div class=3D"gmail_quote">Regards,<br></div><div class=3D"=
gmail_quote">Stan<br></div><div class=3D"gmail_quote"><div><blockquote type=
=3D"cite"><div><div dir=3D"ltr"><div class=3D"gmail_quote">---------- Forwa=
rded message ----------<br>From: <b class=3D"gmail_sendername"></b> <span d=
ir=3D"ltr">&lt;<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank=
">internet-drafts@ietf.org</a>&gt;</span><br>Date: Thu, Jun 9, 2016 at 12:1=
7 AM<br>Subject: [manet] I-D Action: draft-ietf-manet-olsrv2-multipath-09.t=
xt<br>To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">i-d-an=
nounce@ietf.org</a><br>Cc: <a href=3D"mailto:manet@ietf.org" target=3D"_bla=
nk">manet@ietf.org</a><br><br><br><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
This draft is a work item of the Mobile Ad-hoc Networks of the IETF.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 Multi-path Extension for the Optimized Link State Routing Protocol version=
 2 (OLSRv2)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Jiaz=
i Yi<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Benoit Parrein<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-iet=
f-manet-olsrv2-multipath-09.txt<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 23<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 :=
 2016-06-08<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0This document specifies a multi-path extension for the Optimiz=
ed Link<br>
=C2=A0 =C2=A0State Routing Protocol version 2 (OLSRv2) to discover multiple=
<br>
=C2=A0 =C2=A0disjoint paths, so as to improve reliability of the OLSRv2 pro=
tocol.<br>
=C2=A0 =C2=A0The interoperability with OLSRv2 is retained.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-multipa=
th/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/=
draft-ietf-manet-olsrv2-multipath/</a><br>
<br>
There&#39;s also a htmlized version available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-manet-olsrv2-multipath-09=
" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ie=
tf-manet-olsrv2-multipath-09</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-manet-olsrv2-mult=
ipath-09" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff=
?url2=3Ddraft-ietf-manet-olsrv2-multipath-09</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
<br>
_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org" target=3D"_blank">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
</div><br></div>
</div></blockquote></div></div><br></div>

--001a114417fe84f41b0534cf7efd--


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From: Christopher Dearlove <christopher.dearlove@gmail.com>
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Subject: [manet] draft-ietf-olsrv2-multipath-09
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I=E2=80=99v looked at draft -09, and I think it still needs work. I have =
some followups from previous comments, some new comments, and some =
editorial comments that I didn=E2=80=99t get round to making last time. =
And this may not be complete, but I=E2=80=99m up against the too short =
one week limit set. (I=E2=80=99m afraid we just aren=E2=80=99t getting =
given the necessary time in this group. And I seem to be the only one =
commenting.)

Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? =
Not justified. And should make it clear this applies to FEC applied =
across packets, not within a packet.

Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count =
limited, it=E2=80=99s not even an explicit special case.

Page 5, second bullet. How does FEC help with packet re-ordering?

Page 5, fourth bullet, add =E2=80=9Cwith=E2=80=9D after =
=E2=80=9Cexperiment=E2=80=9D.

Page 6, first paragraph. I still disagree with characterising as low =
data rate links. At most the protocol multiplies capacity by a small =
factor, not the orders pf magnitude that link capacities span.

RFC0791, I think omitting the 0 is usual style.

Section 4, first paragraph, not requires, perhaps uses.

The reactive approach in particular has interactions with IP. The =
requirements this protocol imposes on IP need to be documented. (This =
point was made about AODVv2, it applies here - the interactions aren=E2=80=
=99t identical, but need to be specified.

MAX_SRC_HOPS - explain 11.

CUTOFF_RATIO - why strictly greater than one? Should work equal to one.

Section 6.1.1, last word, messages.

Section 7, capitalise Base.

Section 7.1. No need for OLSR in element names, never used anywhere =
else. Usual OLSRv2 style is SR_time without valid. Also SR_orig_addr (we =
are careful about usage).

Delete =E2=80=9Cit=E2=80=9D in multiple element definitions after -

PT_=E2=80=A6 Explain n. Note that n may not be same in all cases.

PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as =
well (e.g Routing Set).

Various places, delete =E2=80=9Cthe=E2=80=9D before Section.

Still no discussion of advertised addresses, should they be encouraged =
in TC messages. Except SR required TC messages, see previous proposal on =
strongly recommending against them. I can=E2=80=99t see that added.

Section 8.2 Setting what should be SR_orig_addr, add address after =
originator.

A major omission is discussion of expiry of new Tuples without expiry =
times. If proactive you can (but don=E2=80=99t) discuss when supporting =
sets change. If reactive it=E2=80=99s rather a mess (a reason I dislike =
the reactive mechanism). When to discard? When to recreate? If dependent =
on packet flow then that=E2=80=99s another interaction with IP to =
document - and implement.

You could when acting reactively forward by usual means in all cases =
while waiting.

The actual packet forwarding by round-robin is an IP process, not this =
protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP =
process, why mandate exactly how it=E2=80=99s used?

Page 12, second bullet. How is this information known? There=E2=80=99s =
no signalling that includes it.

Capitalise all instances of Tuple for consistency.

Page 13. Brutally is not really appropriate language.

Section 8.5.2, I haven=E2=80=99t had time to review this.

Section 9, delete track after experimental.

Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how =
the final bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D =
mean?

Section 10, not reviewed.

Appendices, not reviewed.


From nobody Mon Jun 13 15:38:22 2016
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From: Stan Ratliff <ratliffstan@gmail.com>
Date: Mon, 13 Jun 2016 18:38:01 -0400
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To: Christopher Dearlove <christopher.dearlove@gmail.com>
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Cc: MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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Chris,

The 1-week WGLC was predicated on the thought that we had basically
concluded - that your issues had been addressed, and therefore, what was
needed was a "once-over" check. Apparently, that's not the case.

Having said that, the desire is not to set unreasonable timeframes, but to
make progress, and produce a quality document. So, if the conversation and
revisions take more than the 1-week period, so be it. Let's get it right.

Regards,
Stan


On Mon, Jun 13, 2016 at 5:53 PM, Christopher Dearlove <
christopher.dearlove@gmail.com> wrote:

> I=E2=80=99v looked at draft -09, and I think it still needs work. I have =
some
> followups from previous comments, some new comments, and some editorial
> comments that I didn=E2=80=99t get round to making last time. And this ma=
y not be
> complete, but I=E2=80=99m up against the too short one week limit set. (I=
=E2=80=99m afraid
> we just aren=E2=80=99t getting given the necessary time in this group. An=
d I seem
> to be the only one commenting.)
>
> Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? Not=
 justified. And
> should make it clear this applies to FEC applied across packets, not with=
in
> a packet.
>
> Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count
> limited, it=E2=80=99s not even an explicit special case.
>
> Page 5, second bullet. How does FEC help with packet re-ordering?
>
> Page 5, fourth bullet, add =E2=80=9Cwith=E2=80=9D after =E2=80=9Cexperime=
nt=E2=80=9D.
>
> Page 6, first paragraph. I still disagree with characterising as low data
> rate links. At most the protocol multiplies capacity by a small factor, n=
ot
> the orders pf magnitude that link capacities span.
>
> RFC0791, I think omitting the 0 is usual style.
>
> Section 4, first paragraph, not requires, perhaps uses.
>
> The reactive approach in particular has interactions with IP. The
> requirements this protocol imposes on IP need to be documented. (This poi=
nt
> was made about AODVv2, it applies here - the interactions aren=E2=80=99t =
identical,
> but need to be specified.
>
> MAX_SRC_HOPS - explain 11.
>
> CUTOFF_RATIO - why strictly greater than one? Should work equal to one.
>
> Section 6.1.1, last word, messages.
>
> Section 7, capitalise Base.
>
> Section 7.1. No need for OLSR in element names, never used anywhere else.
> Usual OLSRv2 style is SR_time without valid. Also SR_orig_addr (we are
> careful about usage).
>
> Delete =E2=80=9Cit=E2=80=9D in multiple element definitions after -
>
> PT_=E2=80=A6 Explain n. Note that n may not be same in all cases.
>
> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as =
well (e.g
> Routing Set).
>
> Various places, delete =E2=80=9Cthe=E2=80=9D before Section.
>
> Still no discussion of advertised addresses, should they be encouraged in
> TC messages. Except SR required TC messages, see previous proposal on
> strongly recommending against them. I can=E2=80=99t see that added.
>
> Section 8.2 Setting what should be SR_orig_addr, add address after
> originator.
>
> A major omission is discussion of expiry of new Tuples without expiry
> times. If proactive you can (but don=E2=80=99t) discuss when supporting s=
ets
> change. If reactive it=E2=80=99s rather a mess (a reason I dislike the re=
active
> mechanism). When to discard? When to recreate? If dependent on packet flo=
w
> then that=E2=80=99s another interaction with IP to document - and impleme=
nt.
>
> You could when acting reactively forward by usual means in all cases whil=
e
> waiting.
>
> The actual packet forwarding by round-robin is an IP process, not this
> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proces=
s, why
> mandate exactly how it=E2=80=99s used?
>
> Page 12, second bullet. How is this information known? There=E2=80=99s no
> signalling that includes it.
>
> Capitalise all instances of Tuple for consistency.
>
> Page 13. Brutally is not really appropriate language.
>
> Section 8.5.2, I haven=E2=80=99t had time to review this.
>
> Section 9, delete track after experimental.
>
> Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how the=
 final
> bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D mean?
>
> Section 10, not reviewed.
>
> Appendices, not reviewed.
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>

--001a114047228317440535308a18
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div><div><div><div>Chris, <br><br></div>The 1-week WGLC w=
as predicated on the thought that we had basically concluded - that your is=
sues had been addressed, and therefore, what was needed was a &quot;once-ov=
er&quot; check. Apparently, that&#39;s not the case.<br><br></div>Having sa=
id that, the desire is not to set unreasonable timeframes, but to make prog=
ress, and produce a quality document. So, if the conversation and revisions=
 take more than the 1-week period, so be it. Let&#39;s get it right. <br><b=
r></div>Regards,<br></div>Stan<br><br><div><div><div><div><div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jun 13, 2016 at 5:5=
3 PM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:christop=
her.dearlove@gmail.com" target=3D"_blank">christopher.dearlove@gmail.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I=E2=80=99v looked at=
 draft -09, and I think it still needs work. I have some followups from pre=
vious comments, some new comments, and some editorial comments that I didn=
=E2=80=99t get round to making last time. And this may not be complete, but=
 I=E2=80=99m up against the too short one week limit set. (I=E2=80=99m afra=
id we just aren=E2=80=99t getting given the necessary time in this group. A=
nd I seem to be the only one commenting.)<br>
<br>
Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? Not j=
ustified. And should make it clear this applies to FEC applied across packe=
ts, not within a packet.<br>
<br>
Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count limite=
d, it=E2=80=99s not even an explicit special case.<br>
<br>
Page 5, second bullet. How does FEC help with packet re-ordering?<br>
<br>
Page 5, fourth bullet, add =E2=80=9Cwith=E2=80=9D after =E2=80=9Cexperiment=
=E2=80=9D.<br>
<br>
Page 6, first paragraph. I still disagree with characterising as low data r=
ate links. At most the protocol multiplies capacity by a small factor, not =
the orders pf magnitude that link capacities span.<br>
<br>
RFC0791, I think omitting the 0 is usual style.<br>
<br>
Section 4, first paragraph, not requires, perhaps uses.<br>
<br>
The reactive approach in particular has interactions with IP. The requireme=
nts this protocol imposes on IP need to be documented. (This point was made=
 about AODVv2, it applies here - the interactions aren=E2=80=99t identical,=
 but need to be specified.<br>
<br>
MAX_SRC_HOPS - explain 11.<br>
<br>
CUTOFF_RATIO - why strictly greater than one? Should work equal to one.<br>
<br>
Section 6.1.1, last word, messages.<br>
<br>
Section 7, capitalise Base.<br>
<br>
Section 7.1. No need for OLSR in element names, never used anywhere else. U=
sual OLSRv2 style is SR_time without valid. Also SR_orig_addr (we are caref=
ul about usage).<br>
<br>
Delete =E2=80=9Cit=E2=80=9D in multiple element definitions after -<br>
<br>
PT_=E2=80=A6 Explain n. Note that n may not be same in all cases.<br>
<br>
PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as we=
ll (e.g Routing Set).<br>
<br>
Various places, delete =E2=80=9Cthe=E2=80=9D before Section.<br>
<br>
Still no discussion of advertised addresses, should they be encouraged in T=
C messages. Except SR required TC messages, see previous proposal on strong=
ly recommending against them. I can=E2=80=99t see that added.<br>
<br>
Section 8.2 Setting what should be SR_orig_addr, add address after originat=
or.<br>
<br>
A major omission is discussion of expiry of new Tuples without expiry times=
. If proactive you can (but don=E2=80=99t) discuss when supporting sets cha=
nge. If reactive it=E2=80=99s rather a mess (a reason I dislike the reactiv=
e mechanism). When to discard? When to recreate? If dependent on packet flo=
w then that=E2=80=99s another interaction with IP to document - and impleme=
nt.<br>
<br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<br>
<br>
Page 12, second bullet. How is this information known? There=E2=80=99s no s=
ignalling that includes it.<br>
<br>
Capitalise all instances of Tuple for consistency.<br>
<br>
Page 13. Brutally is not really appropriate language.<br>
<br>
Section 8.5.2, I haven=E2=80=99t had time to review this.<br>
<br>
Section 9, delete track after experimental.<br>
<br>
Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how the f=
inal bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D mean?<br>
<br>
Section 10, not reviewed.<br>
<br>
Appendices, not reviewed.<br>
<br>
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--_000_B31EEDDDB8ED7E4A93FDF12A4EECD30D923D04B6GLKXM0002VGREEN_--


From nobody Tue Jun 14 10:22:36 2016
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From: "Spencer Dawkins" <spencerdawkins.ietf@gmail.com>
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Subject: [manet] Spencer Dawkins' No Objection on charter-ietf-manet-03-03: (with COMMENT)
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Spencer Dawkins has entered the following ballot position for
charter-ietf-manet-03-03: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
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The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/charter-ietf-manet/



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

Just as a nit, the charter spells out FIB as "forwarding information
base", but does not spell out or give references for several acronyms
that are quite a bit less well known. If the text could either expand
them or give references, that would help people who aren't skilled in the
art ...



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From: Jiazi YI <ietf@jiaziyi.com>
Date: Wed, 15 Jun 2016 00:03:57 +0200
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Cc: Christopher Dearlove <christopher.dearlove@gmail.com>, MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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--001a114003c68c141a0535442e37
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Hi Stan, Chris:

firstly, thanks very much for the comments and reply.


On Tue, Jun 14, 2016 at 12:38 AM, Stan Ratliff <ratliffstan@gmail.com>
wrote:

> Chris,
>
> The 1-week WGLC was predicated on the thought that we had basically
> concluded - that your issues had been addressed, and therefore, what was
> needed was a "once-over" check.
>

I kinda have the same impression because we didn't get much feedback
several days after we replied Chris' post and released a -09alpha revision
on the mailing list.
But of course, we all have other work to do, so it's totally
understandable.


> Apparently, that's not the case.
>
> Having said that, the desire is not to set unreasonable timeframes, but t=
o
> make progress, and produce a quality document. So, if the conversation an=
d
> revisions take more than the 1-week period, so be it. Let's get it right.
>

sure

We will make further updates based on the comments received, and provide a
detailed reply.

cheers

Jiazi


>
> Regards,
> Stan
>
>
>
> On Mon, Jun 13, 2016 at 5:53 PM, Christopher Dearlove <
> christopher.dearlove@gmail.com> wrote:
>
>> I=E2=80=99v looked at draft -09, and I think it still needs work. I have=
 some
>> followups from previous comments, some new comments, and some editorial
>> comments that I didn=E2=80=99t get round to making last time. And this m=
ay not be
>> complete, but I=E2=80=99m up against the too short one week limit set. (=
I=E2=80=99m afraid
>> we just aren=E2=80=99t getting given the necessary time in this group. A=
nd I seem
>> to be the only one commenting.)
>>
>> Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? No=
t justified. And
>> should make it clear this applies to FEC applied across packets, not wit=
hin
>> a packet.
>>
>> Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count
>> limited, it=E2=80=99s not even an explicit special case.
>>
>> Page 5, second bullet. How does FEC help with packet re-ordering?
>>
>> Page 5, fourth bullet, add =E2=80=9Cwith=E2=80=9D after =E2=80=9Cexperim=
ent=E2=80=9D.
>>
>> Page 6, first paragraph. I still disagree with characterising as low dat=
a
>> rate links. At most the protocol multiplies capacity by a small factor, =
not
>> the orders pf magnitude that link capacities span.
>>
>> RFC0791, I think omitting the 0 is usual style.
>>
>> Section 4, first paragraph, not requires, perhaps uses.
>>
>> The reactive approach in particular has interactions with IP. The
>> requirements this protocol imposes on IP need to be documented. (This po=
int
>> was made about AODVv2, it applies here - the interactions aren=E2=80=99t=
 identical,
>> but need to be specified.
>>
>> MAX_SRC_HOPS - explain 11.
>>
>> CUTOFF_RATIO - why strictly greater than one? Should work equal to one.
>>
>> Section 6.1.1, last word, messages.
>>
>> Section 7, capitalise Base.
>>
>> Section 7.1. No need for OLSR in element names, never used anywhere else=
.
>> Usual OLSRv2 style is SR_time without valid. Also SR_orig_addr (we are
>> careful about usage).
>>
>> Delete =E2=80=9Cit=E2=80=9D in multiple element definitions after -
>>
>> PT_=E2=80=A6 Explain n. Note that n may not be same in all cases.
>>
>> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as=
 well
>> (e.g Routing Set).
>>
>> Various places, delete =E2=80=9Cthe=E2=80=9D before Section.
>>
>> Still no discussion of advertised addresses, should they be encouraged i=
n
>> TC messages. Except SR required TC messages, see previous proposal on
>> strongly recommending against them. I can=E2=80=99t see that added.
>>
>> Section 8.2 Setting what should be SR_orig_addr, add address after
>> originator.
>>
>> A major omission is discussion of expiry of new Tuples without expiry
>> times. If proactive you can (but don=E2=80=99t) discuss when supporting =
sets
>> change. If reactive it=E2=80=99s rather a mess (a reason I dislike the r=
eactive
>> mechanism). When to discard? When to recreate? If dependent on packet fl=
ow
>> then that=E2=80=99s another interaction with IP to document - and implem=
ent.
>>
>> You could when acting reactively forward by usual means in all cases
>> while waiting.
>>
>> The actual packet forwarding by round-robin is an IP process, not this
>> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proce=
ss, why
>> mandate exactly how it=E2=80=99s used?
>>
>> Page 12, second bullet. How is this information known? There=E2=80=99s n=
o
>> signalling that includes it.
>>
>> Capitalise all instances of Tuple for consistency.
>>
>> Page 13. Brutally is not really appropriate language.
>>
>> Section 8.5.2, I haven=E2=80=99t had time to review this.
>>
>> Section 9, delete track after experimental.
>>
>> Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how th=
e final
>> bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D mean?
>>
>> Section 10, not reviewed.
>>
>> Appendices, not reviewed.
>>
>> _______________________________________________
>> manet mailing list
>> manet@ietf.org
>> https://www.ietf.org/mailman/listinfo/manet
>>
>
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>
>

--001a114003c68c141a0535442e37
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Stan, Chris:<div><br></div><div>firstly, thanks very mu=
ch for the comments and reply.=C2=A0</div><div><div class=3D"gmail_extra"><=
br></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, =
Jun 14, 2016 at 12:38 AM, Stan Ratliff <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:ratliffstan@gmail.com" target=3D"_blank">ratliffstan@gmail.com</a>&gt;<=
/span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-l=
eft-style:solid;padding-left:1ex"><div dir=3D"ltr"><div><div><div><div>Chri=
s, <br><br></div>The 1-week WGLC was predicated on the thought that we had =
basically concluded - that your issues had been addressed, and therefore, w=
hat was needed was a &quot;once-over&quot; check. </div></div></div></div><=
/blockquote><div><br></div><div>I kinda have the same impression because we=
 didn&#39;t get much feedback several days after we replied Chris&#39; post=
 and released a -09alpha revision on the mailing list.=C2=A0</div><div>But =
of course, we all have other work to do, so it&#39;s totally understandable=
.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,=
204);border-left-style:solid;padding-left:1ex"><div dir=3D"ltr"><div><div><=
div>Apparently, that&#39;s not the case.<br><br></div>Having said that, the=
 desire is not to set unreasonable timeframes, but to make progress, and pr=
oduce a quality document. So, if the conversation and revisions take more t=
han the 1-week period, so be it. Let&#39;s get it right. <br></div></div></=
div></blockquote><div><br></div><div>sure</div><div><br></div><div>We will =
make further updates based on the comments received, and provide a detailed=
 reply.=C2=A0</div><div><br></div><div>cheers</div><div><br></div><div>Jiaz=
i</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);b=
order-left-style:solid;padding-left:1ex"><div dir=3D"ltr"><div><div><br></d=
iv>Regards,<br></div>Stan<div><div class=3D"h5"><br><br><div><div><div><div=
><div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jun=
 13, 2016 at 5:53 PM, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D=
"mailto:christopher.dearlove@gmail.com" target=3D"_blank">christopher.dearl=
ove@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb=
(204,204,204);border-left-style:solid;padding-left:1ex">I=E2=80=99v looked =
at draft -09, and I think it still needs work. I have some followups from p=
revious comments, some new comments, and some editorial comments that I did=
n=E2=80=99t get round to making last time. And this may not be complete, bu=
t I=E2=80=99m up against the too short one week limit set. (I=E2=80=99m afr=
aid we just aren=E2=80=99t getting given the necessary time in this group. =
And I seem to be the only one commenting.)<br>
<br>
Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? Not j=
ustified. And should make it clear this applies to FEC applied across packe=
ts, not within a packet.<br>
<br>
Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count limite=
d, it=E2=80=99s not even an explicit special case.<br>
<br>
Page 5, second bullet. How does FEC help with packet re-ordering?<br>
<br>
Page 5, fourth bullet, add =E2=80=9Cwith=E2=80=9D after =E2=80=9Cexperiment=
=E2=80=9D.<br>
<br>
Page 6, first paragraph. I still disagree with characterising as low data r=
ate links. At most the protocol multiplies capacity by a small factor, not =
the orders pf magnitude that link capacities span.<br>
<br>
RFC0791, I think omitting the 0 is usual style.<br>
<br>
Section 4, first paragraph, not requires, perhaps uses.<br>
<br>
The reactive approach in particular has interactions with IP. The requireme=
nts this protocol imposes on IP need to be documented. (This point was made=
 about AODVv2, it applies here - the interactions aren=E2=80=99t identical,=
 but need to be specified.<br>
<br>
MAX_SRC_HOPS - explain 11.<br>
<br>
CUTOFF_RATIO - why strictly greater than one? Should work equal to one.<br>
<br>
Section 6.1.1, last word, messages.<br>
<br>
Section 7, capitalise Base.<br>
<br>
Section 7.1. No need for OLSR in element names, never used anywhere else. U=
sual OLSRv2 style is SR_time without valid. Also SR_orig_addr (we are caref=
ul about usage).<br>
<br>
Delete =E2=80=9Cit=E2=80=9D in multiple element definitions after -<br>
<br>
PT_=E2=80=A6 Explain n. Note that n may not be same in all cases.<br>
<br>
PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as we=
ll (e.g Routing Set).<br>
<br>
Various places, delete =E2=80=9Cthe=E2=80=9D before Section.<br>
<br>
Still no discussion of advertised addresses, should they be encouraged in T=
C messages. Except SR required TC messages, see previous proposal on strong=
ly recommending against them. I can=E2=80=99t see that added.<br>
<br>
Section 8.2 Setting what should be SR_orig_addr, add address after originat=
or.<br>
<br>
A major omission is discussion of expiry of new Tuples without expiry times=
. If proactive you can (but don=E2=80=99t) discuss when supporting sets cha=
nge. If reactive it=E2=80=99s rather a mess (a reason I dislike the reactiv=
e mechanism). When to discard? When to recreate? If dependent on packet flo=
w then that=E2=80=99s another interaction with IP to document - and impleme=
nt.<br>
<br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<br>
<br>
Page 12, second bullet. How is this information known? There=E2=80=99s no s=
ignalling that includes it.<br>
<br>
Capitalise all instances of Tuple for consistency.<br>
<br>
Page 13. Brutally is not really appropriate language.<br>
<br>
Section 8.5.2, I haven=E2=80=99t had time to review this.<br>
<br>
Section 9, delete track after experimental.<br>
<br>
Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how the f=
inal bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D mean?<br>
<br>
Section 10, not reviewed.<br>
<br>
Appendices, not reviewed.<br>
<br>
_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org" target=3D"_blank">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
</blockquote></div><br></div></div></div></div></div></div></div></div></di=
v>
<br>_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
<br></blockquote></div><br></div></div></div>

--001a114003c68c141a0535442e37--


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

As for other charters, the expected status of the work items is a plus
(experimental, informational, proposed standard)
ex: <bla> to the IESG for publication as Proposed Standard RFC



From nobody Thu Jun 16 05:47:26 2016
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BLOCK:
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Apologies if I'm getting the wrong thing here, but what is DLEP?
I seem to recall there being something similarly named that had
potentially significant security affects, so if this is the same thing, 
then maybe the charter needs to say some more about that and 
what the WG need to do about it. (Again, sorry if I'm getting the 
wrong end of the wrong stick here but we can chat about it on 
the call;-)





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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
Thread-Topic: Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Date: Thu, 16 Jun 2016 13:01:06 +0000
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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On 6/16/16, 7:47 AM, "iesg on behalf of Stephen Farrell"
<iesg-bounces@ietf.org on behalf of stephen.farrell@cs.tcd.ie> wrote:

Stephen:

Hi!

>--------------------------------------------------------------
>BLOCK:
>----------------------------------------------------------------------
>
>Apologies if I'm getting the wrong thing here, but what is DLEP?
>I seem to recall there being something similarly named that had
>potentially significant security affects, so if this is the same thing,
>then maybe the charter needs to say some more about that and
>what the WG need to do about it. (Again, sorry if I'm getting the
>wrong end of the wrong stick here but we can chat about it on
>the call;-)

https://datatracker.ietf.org/doc/draft-ietf-manet-dlep/

I think you're thinking of the right document.  It is currently in my
publication queue, the authors are addressing my comments (some in fact
security related) -- hopefully we'll have it in a Telechat in a couple of
cycles.

We didn't explicitly put DLEP in the updated charter (just its
maintenance) because the work passed WGLC, etc., so (hopefully) the WG is
done with the base specification.  I don't have a problem if you think we
should explicitly call out DLEP as a deliverable -- I don't think we can
put more details in at this point.

Thoughts?

Thanks!

Alvaro.


From nobody Thu Jun 16 06:31:45 2016
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To: "Alvaro Retana (aretana)" <aretana@cisco.com>, The IESG <iesg@ietf.org>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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On 16/06/16 14:01, Alvaro Retana (aretana) wrote:
> On 6/16/16, 7:47 AM, "iesg on behalf of Stephen Farrell"
> <iesg-bounces@ietf.org on behalf of stephen.farrell@cs.tcd.ie> wrote:
>=20
> Stephen:
>=20
> Hi!
>=20
>> --------------------------------------------------------------
>> BLOCK:
>> ----------------------------------------------------------------------=

>>
>> Apologies if I'm getting the wrong thing here, but what is DLEP?
>> I seem to recall there being something similarly named that had
>> potentially significant security affects, so if this is the same thing=
,
>> then maybe the charter needs to say some more about that and
>> what the WG need to do about it. (Again, sorry if I'm getting the
>> wrong end of the wrong stick here but we can chat about it on
>> the call;-)
>=20
> https://datatracker.ietf.org/doc/draft-ietf-manet-dlep/
>=20
> I think you're thinking of the right document.=20

Ah good:-)

>  It is currently in my
> publication queue, the authors are addressing my comments (some in fact=

> security related) -- hopefully we'll have it in a Telechat in a couple =
of
> cycles.
>=20
> We didn't explicitly put DLEP in the updated charter (just its
> maintenance) because the work passed WGLC, etc., so (hopefully) the WG =
is
> done with the base specification.  I don't have a problem if you think =
we
> should explicitly call out DLEP as a deliverable -- I don't think we ca=
n
> put more details in at this point.

Was DLEP ever mentioned before in the MANET WG charter? I guess I'm
wondering if it's really MANET specific and whether, if it was more
broadly used, it'd also have potential privacy issues.

S.



>=20
> Thoughts?
>=20
> Thanks!
>=20
> Alvaro.
>=20


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From: Justin Dean <bebemaster@gmail.com>
Date: Thu, 16 Jun 2016 13:36:09 +0000
Message-ID: <CA+-pDCfYCz6Sjjm2Eu5t769YmPijkAVjJBiAmih1AknHUcmwQQ@mail.gmail.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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--001a114be688b05d9f0535655245
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We do have a DLEP extension listed as a deliverable. There is quite a bit
of interest and effort regarding extending it from various
person/organizations. It's a safe bet that some drafts WILL be produced.

Some history regarding DLEP (dynamic link exchange protocol). It was not
mentioned previously in the WG charter. The draft had cleared WG last call
over a year ago but after an extensive directorate review was sent back and
reworked to address those conserns. Security related issues have be raised
both in last call, and most recently in Alvaro's comments. I do believe the
remaining issues will be resolved as the working group has multiple options
ready to go, as it has been discussed at length and rough.

Justin

On Thu, Jun 16, 2016, 9:07 AM Alvaro Retana (aretana) <aretana@cisco.com>
wrote:

> On 6/16/16, 7:47 AM, "iesg on behalf of Stephen Farrell"
> <iesg-bounces@ietf.org on behalf of stephen.farrell@cs.tcd.ie> wrote:
>
> Stephen:
>
> Hi!
>
> >--------------------------------------------------------------
> >BLOCK:
> >----------------------------------------------------------------------
> >
> >Apologies if I'm getting the wrong thing here, but what is DLEP?
> >I seem to recall there being something similarly named that had
> >potentially significant security affects, so if this is the same thing,
> >then maybe the charter needs to say some more about that and
> >what the WG need to do about it. (Again, sorry if I'm getting the
> >wrong end of the wrong stick here but we can chat about it on
> >the call;-)
>
> https://datatracker.ietf.org/doc/draft-ietf-manet-dlep/
>
> I think you're thinking of the right document.  It is currently in my
> publication queue, the authors are addressing my comments (some in fact
> security related) -- hopefully we'll have it in a Telechat in a couple of
> cycles.
>
> We didn't explicitly put DLEP in the updated charter (just its
> maintenance) because the work passed WGLC, etc., so (hopefully) the WG is
> done with the base specification.  I don't have a problem if you think we
> should explicitly call out DLEP as a deliverable -- I don't think we can
> put more details in at this point.
>
> Thoughts?
>
> Thanks!
>
> Alvaro.
>
>

--001a114be688b05d9f0535655245
Content-Type: text/html; charset=UTF-8
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<p dir=3D"ltr">We do have a DLEP extension listed as a deliverable. There i=
s quite a bit of interest and effort regarding extending it from various pe=
rson/organizations. It&#39;s a safe bet that some drafts WILL be produced.<=
/p>
<p dir=3D"ltr">Some history regarding DLEP (dynamic link exchange protocol)=
. It was not mentioned previously in the WG charter. The draft had cleared =
WG last call over a year ago but after an extensive directorate review was =
sent back and reworked to address those conserns. Security related issues h=
ave be raised both in last call, and most recently in Alvaro&#39;s comments=
. I do believe the remaining issues will be resolved as the working group h=
as multiple options ready to go, as it has been discussed at length and rou=
gh.</p>
<p dir=3D"ltr">Justin<br>
</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 16, 2016, 9:07 =
AM Alvaro Retana (aretana) &lt;<a href=3D"mailto:aretana@cisco.com">aretana=
@cisco.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 6/16/=
16, 7:47 AM, &quot;iesg on behalf of Stephen Farrell&quot;<br>
&lt;<a href=3D"mailto:iesg-bounces@ietf.org" target=3D"_blank">iesg-bounces=
@ietf.org</a> on behalf of <a href=3D"mailto:stephen.farrell@cs.tcd.ie" tar=
get=3D"_blank">stephen.farrell@cs.tcd.ie</a>&gt; wrote:<br>
<br>
Stephen:<br>
<br>
Hi!<br>
<br>
&gt;--------------------------------------------------------------<br>
&gt;BLOCK:<br>
&gt;----------------------------------------------------------------------<=
br>
&gt;<br>
&gt;Apologies if I&#39;m getting the wrong thing here, but what is DLEP?<br=
>
&gt;I seem to recall there being something similarly named that had<br>
&gt;potentially significant security affects, so if this is the same thing,=
<br>
&gt;then maybe the charter needs to say some more about that and<br>
&gt;what the WG need to do about it. (Again, sorry if I&#39;m getting the<b=
r>
&gt;wrong end of the wrong stick here but we can chat about it on<br>
&gt;the call;-)<br>
<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-manet-dlep/" rel=3D"=
noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-m=
anet-dlep/</a><br>
<br>
I think you&#39;re thinking of the right document.=C2=A0 It is currently in=
 my<br>
publication queue, the authors are addressing my comments (some in fact<br>
security related) -- hopefully we&#39;ll have it in a Telechat in a couple =
of<br>
cycles.<br>
<br>
We didn&#39;t explicitly put DLEP in the updated charter (just its<br>
maintenance) because the work passed WGLC, etc., so (hopefully) the WG is<b=
r>
done with the base specification.=C2=A0 I don&#39;t have a problem if you t=
hink we<br>
should explicitly call out DLEP as a deliverable -- I don&#39;t think we ca=
n<br>
put more details in at this point.<br>
<br>
Thoughts?<br>
<br>
Thanks!<br>
<br>
Alvaro.<br>
<br>
</blockquote></div>

--001a114be688b05d9f0535655245--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
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On 6/16/16, 8:31 AM, "Stephen Farrell" <stephen.farrell@cs.tcd.ie> wrote:

Hi!

>>We didn't explicitly put DLEP in the updated charter (just its
>>maintenance) because the work passed WGLC, etc., so (hopefully) the WG is
>>done with the base specification.  I don't have a problem if you think we
>>should explicitly call out DLEP as a deliverable -- I don't think we can
>>put more details in at this point.
>
>Was DLEP ever mentioned before in the MANET WG charter?

No, but AFAIK manet-type applications where the radio and the router are
not in the same box are the only ones requiring the functionality, which
is why the WG took on the work (several years ago) -- and had done other
related work before.


>I guess I'm
>wondering if it's really MANET specific and whether, if it was more
>broadly used, it'd also have potential privacy issues.

Note that while MANET means "mobile..", mobility is of course relative and
anyone can successfully argue that any network "moves"...  So, yes, it
could be used in other scenarios.  One of my review comments was precisely
about that: if DLEP is used outside the expected deployment scenario, what
changes?



Back to the charter...  Should we explicitly list DLEP (not just
extensions, as Justin pointed out) as one of the deliverables?

Thanks!

Alvaro.


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From: Justin Dean <bebemaster@gmail.com>
Date: Thu, 16 Jun 2016 14:01:57 +0000
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To: "Alvaro Retana (aretana)" <aretana@cisco.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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If that is the only option to move it forward than I'm okay removing it. I
do like having a deadline for producing something though. Stan and others
likely has a strong opinion than myself. As long as we are charted to do
the work I'm okay.

Justin

On Thu, Jun 16, 2016, 9:52 AM Alvaro Retana (aretana) <aretana@cisco.com>
wrote:

> On 6/16/16, 8:31 AM, "Stephen Farrell" <stephen.farrell@cs.tcd.ie> wrote:
>
> Hi!
>
> >>We didn't explicitly put DLEP in the updated charter (just its
> >>maintenance) because the work passed WGLC, etc., so (hopefully) the WG is
> >>done with the base specification.  I don't have a problem if you think we
> >>should explicitly call out DLEP as a deliverable -- I don't think we can
> >>put more details in at this point.
> >
> >Was DLEP ever mentioned before in the MANET WG charter?
>
> No, but AFAIK manet-type applications where the radio and the router are
> not in the same box are the only ones requiring the functionality, which
> is why the WG took on the work (several years ago) -- and had done other
> related work before.
>
>
> >I guess I'm
> >wondering if it's really MANET specific and whether, if it was more
> >broadly used, it'd also have potential privacy issues.
>
> Note that while MANET means "mobile..", mobility is of course relative and
> anyone can successfully argue that any network "moves"...  So, yes, it
> could be used in other scenarios.  One of my review comments was precisely
> about that: if DLEP is used outside the expected deployment scenario, what
> changes?
>
>
>
> Back to the charter...  Should we explicitly list DLEP (not just
> extensions, as Justin pointed out) as one of the deliverables?
>
> Thanks!
>
> Alvaro.
>
>

--001a114e4e06fdb754053565ae38
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<p dir=3D"ltr">If that is the only option to move it forward than I&#39;m o=
kay removing it. I do like having a deadline for producing something though=
. Stan and others likely has a strong opinion than myself. As long as we ar=
e charted to do the work I&#39;m okay.</p>
<p dir=3D"ltr">Justin</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 16, 2016, 9:52 =
AM Alvaro Retana (aretana) &lt;<a href=3D"mailto:aretana@cisco.com">aretana=
@cisco.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 6/16/=
16, 8:31 AM, &quot;Stephen Farrell&quot; &lt;<a href=3D"mailto:stephen.farr=
ell@cs.tcd.ie" target=3D"_blank">stephen.farrell@cs.tcd.ie</a>&gt; wrote:<b=
r>
<br>
Hi!<br>
<br>
&gt;&gt;We didn&#39;t explicitly put DLEP in the updated charter (just its<=
br>
&gt;&gt;maintenance) because the work passed WGLC, etc., so (hopefully) the=
 WG is<br>
&gt;&gt;done with the base specification.=C2=A0 I don&#39;t have a problem =
if you think we<br>
&gt;&gt;should explicitly call out DLEP as a deliverable -- I don&#39;t thi=
nk we can<br>
&gt;&gt;put more details in at this point.<br>
&gt;<br>
&gt;Was DLEP ever mentioned before in the MANET WG charter?<br>
<br>
No, but AFAIK manet-type applications where the radio and the router are<br=
>
not in the same box are the only ones requiring the functionality, which<br=
>
is why the WG took on the work (several years ago) -- and had done other<br=
>
related work before.<br>
<br>
<br>
&gt;I guess I&#39;m<br>
&gt;wondering if it&#39;s really MANET specific and whether, if it was more=
<br>
&gt;broadly used, it&#39;d also have potential privacy issues.<br>
<br>
Note that while MANET means &quot;mobile..&quot;, mobility is of course rel=
ative and<br>
anyone can successfully argue that any network &quot;moves&quot;...=C2=A0 S=
o, yes, it<br>
could be used in other scenarios.=C2=A0 One of my review comments was preci=
sely<br>
about that: if DLEP is used outside the expected deployment scenario, what<=
br>
changes?<br>
<br>
<br>
<br>
Back to the charter...=C2=A0 Should we explicitly list DLEP (not just<br>
extensions, as Justin pointed out) as one of the deliverables?<br>
<br>
Thanks!<br>
<br>
Alvaro.<br>
<br>
</blockquote></div>

--001a114e4e06fdb754053565ae38--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Justin Dean <bebemaster@gmail.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
Thread-Topic: Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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On 6/16/16, 9:01 AM, "Justin Dean" <bebemaster@gmail.com<mailto:bebemaster@=
gmail.com>> wrote:

Justin:

Hi!

If that is the only option to move it forward than I'm okay removing it. I =
do like having a deadline for producing something though. Stan and others l=
ikely has a strong opinion than myself. As long as we are charted to do the=
 work I'm okay

My proposal to Stephen is not to take anything off, but to explicitly add D=
LEP (the base document) as a deliverable.

I'm on the IESG Telechat with Stephen right now...we should talk about it i=
n a few minutes.

Alvaro.

--_000_D3881E8512E885aretanaciscocom_
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/16/16, 9:01 AM, &quot;Justin Dean&quot; &lt;<a href=3D"mailto:beb=
emaster@gmail.com">bebemaster@gmail.com</a>&gt; wrote:</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div>Justin:</div>
</span>
<div><br>
</div>
<div>Hi!</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<p dir=3D"ltr" style=3D"color: rgb(0, 0, 0); font-family: -webkit-standard;=
 font-style: normal; font-variant: normal; font-weight: normal; letter-spac=
ing: normal; orphans: auto; text-align: start; text-indent: 0px; text-trans=
form: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-t=
ext-stroke-width: 0px;">
If that is the only option to move it forward than I'm okay removing it. I =
do like having a deadline for producing something though. Stan and others l=
ikely has a strong opinion than myself. As long as we are charted to do the=
 work I'm okay</p>
</blockquote>
</span>
<div>My proposal to Stephen is not to take anything off, but to explicitly =
add DLEP (the base document) as a deliverable.</div>
<div><br>
</div>
<div>I'm on the IESG Telechat with Stephen right now&#8230;we should talk a=
bout it in a few minutes.</div>
<div><br>
</div>
<div>Alvaro.</div>
</body>
</html>

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From: Justin Dean <bebemaster@gmail.com>
Date: Thu, 16 Jun 2016 14:29:28 +0000
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To: "Alvaro Retana (aretana)" <aretana@cisco.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, The IESG <iesg@ietf.org>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Sounds good to me.

On Thu, Jun 16, 2016, 10:16 AM Alvaro Retana (aretana) <aretana@cisco.com>
wrote:

> On 6/16/16, 9:01 AM, "Justin Dean" <bebemaster@gmail.com> wrote:
>
> Justin:
>
> Hi!
>
> If that is the only option to move it forward than I'm okay removing it. =
I
> do like having a deadline for producing something though. Stan and others
> likely has a strong opinion than myself. As long as we are charted to do
> the work I'm okay
>
> My proposal to Stephen is not to take anything off, but to explicitly add
> DLEP (the base document) as a deliverable.
>
> I'm on the IESG Telechat with Stephen right now=E2=80=A6we should talk ab=
out it in
> a few minutes.
>
> Alvaro.
>

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<p dir=3D"ltr">Sounds good to me. </p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 16, 2016, 10:16=
 AM Alvaro Retana (aretana) &lt;<a href=3D"mailto:aretana@cisco.com">aretan=
a@cisco.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>On 6/16/16, 9:01 AM, &quot;Justin Dean&quot; &lt;<a href=3D"mailto:beb=
emaster@gmail.com" target=3D"_blank">bebemaster@gmail.com</a>&gt; wrote:</d=
iv>
<div><br>
</div>
<span>
<div>Justin:</div>
</span>
<div><br>
</div>
<div>Hi!</div></div><div style=3D"word-wrap:break-word;color:rgb(0,0,0);fon=
t-size:14px;font-family:Calibri,sans-serif">
<span>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<p dir=3D"ltr" style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-=
style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;t=
ext-align:start;text-indent:0px;text-transform:none;white-space:normal;word=
-spacing:0px">
If that is the only option to move it forward than I&#39;m okay removing it=
. I do like having a deadline for producing something though. Stan and othe=
rs likely has a strong opinion than myself. As long as we are charted to do=
 the work I&#39;m okay</p>
</blockquote>
</span>
</div><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;fo=
nt-family:Calibri,sans-serif"><div>My proposal to Stephen is not to take an=
ything off, but to explicitly add DLEP (the base document) as a deliverable=
.</div>
<div><br>
</div>
<div>I&#39;m on the IESG Telechat with Stephen right now=E2=80=A6we should =
talk about it in a few minutes.</div></div><div style=3D"word-wrap:break-wo=
rd;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif">
<div><br>
</div>
<div>Alvaro.</div>
</div></blockquote></div>

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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Subject: Re: Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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On 6/16/16 5:47 AM, Stephen Farrell wrote:
> Stephen Farrell has entered the following ballot position for
> charter-ietf-manet-03-05: Block
>=20
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this=

> introductory paragraph, however.)
>=20
>=20
>=20
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/charter-ietf-manet/
>=20
>=20
>=20
> ----------------------------------------------------------------------
> BLOCK:
> ----------------------------------------------------------------------
>=20
>=20
> Apologies if I'm getting the wrong thing here, but what is DLEP?
> I seem to recall there being something similarly named that had
> potentially significant security affects, so if this is the same thing,=
=20
> then maybe the charter needs to say some more about that and=20
> what the WG need to do about it. (Again, sorry if I'm getting the=20
> wrong end of the wrong stick here but we can chat about it on=20
> the call;-)

imho dlep is about extending adjecency detection to adjacent radios
attached to a router, rather than requiring that it (the routing
function) be embedded in the radio itself. it may extend to the other
end of the radio link.  enumerating prefixes that are offlink (by which
we mean not bounded by the common broadcast domain) is really the domain
of a routing protocol running over the link e.g. olsrv2 ospf etc.

>=20
>=20
>=20



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From: Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
To: Stan Ratliff <ratliffstan@gmail.com>
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>> You could take coalition force communication as an example.

You could also formulate the example in more neutral terms.

> The usual answer given in cases like this is to exploit route redistribution -
> each protocol takes the other's routes as external. In mobile scenarios,
> there's a whole host of problems associated with that.
>
> It quickly gets to a "boiling the ocean" scenario, so I wonder if
> there's an approach to bound at least part of the problem in order to
> focus on it and get a resolution.

What implementation experience do we have?

(FWIW, I know that the Italian community meshes are using multiple routing
protocols and doing redistribution at a large scale, but I'm not sure what
their policies are.)

-- Juliusz



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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com>
From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Sun, 19 Jun 2016 17:52:14 +0200
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Cc: "manet-chairs@ietf.org" <manet-chairs@ietf.org>, "manet@ietf.org" <manet@ietf.org>, The IESG <iesg@ietf.org>, Stephen Farrell <stephen.farrell@cs.tcd.ie>
Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Hi Alvaro,

I get distracted by many work items Last-calls/large-volume when they
submited without priority and specially when we work in MANET WG. Is their
priority in approving items/efforts. Management needs priority and clear
work path, specially when group of remote participants are working.

I would recommend to your management that they focus the recharter to list
item works per schedule/periority. IMHO, in MANET one important job of
AODVv2 was not completed because of past other works that were not listed
in charter and no priorities in WG efforts.

 I think that All ADs look into priorities of jobs in each WG and work in
line with Chairs, but it is not clear if we don't write it down in your
approval. I am sorry that IESG approval has no priorities or words of
instructions per recharter, but please advise if I am wrong, I just see
approvals without conditions and guidance. I think that there are many work
in MANET WG that can be accepted because the group works are about mobile
protocols, that is a problem. Mobile and dynamic does not mean having
dynamic in management of our projects. I did mention before about not to
take many work in MANET WG but the ADs/Chairs did not follow my discussion
on the discuss-list. I think in future work that ADs and chair need to
follow up seriously with items in each meeting.

I think this WG needs to get approval from IESG of some focused and
important MANET drafts, one is maintenance of OLSRv2 and other MANET
protocol. I proposed before that this WG needs a clear use case which is
focused in a draft, while the old draft of our manet-use case should be
updated as recharter. Only then we can see the priorities per items.  I
remember when the DLEP item was accepted I was wondering why me as remote
participant was not asked to accept or note.  I propose that DLEP should
not continue in MANET only if the WG completes the multicast routing issues
(so it should have less priority).

Please IESG look into priority and schedules of work items per WGs. Please
draw per recharter a clear approval with guidance and conditions, as it is
done in many other organisations. In this way we can force the WG to focus
their efforts and times. Still the IESG and IETF WGs are following authors
to focus/work, so if the participant is bussy with less periority wg-item
he/she must give more effort to most-priority and help authors in editting
that. Please this needs to change especially in our MANET which seems
dynamic in work and submission. Overall, WG participants should follow
WG-schedules and IESG-approvals per priority.

I advise that this charter needs more focused item works, clear draft (it
seems dynamic recharter with future random flow), How can we fix this
dynamic in work submission/lists/proposals without priorities or listed
items in the charter to be approved. What do you think?

Best Regards

AB

On Thu, Jun 16, 2016 at 3:51 PM, Alvaro Retana (aretana) <aretana@cisco.com>
wrote:

> On 6/16/16, 8:31 AM, "Stephen Farrell" <stephen.farrell@cs.tcd.ie> wrote:
>
> Hi!
>
> >>We didn't explicitly put DLEP in the updated charter (just its
> >>maintenance) because the work passed WGLC, etc., so (hopefully) the WG is
> >>done with the base specification.  I don't have a problem if you think we
> >>should explicitly call out DLEP as a deliverable -- I don't think we can
> >>put more details in at this point.
> >
> >Was DLEP ever mentioned before in the MANET WG charter?
>
> No, but AFAIK manet-type applications where the radio and the router are
> not in the same box are the only ones requiring the functionality, which
> is why the WG took on the work (several years ago) -- and had done other
> related work before.
>
>
> >I guess I'm
> >wondering if it's really MANET specific and whether, if it was more
> >broadly used, it'd also have potential privacy issues.
>
> Note that while MANET means "mobile..", mobility is of course relative and
> anyone can successfully argue that any network "moves"...  So, yes, it
> could be used in other scenarios.  One of my review comments was precisely
> about that: if DLEP is used outside the expected deployment scenario, what
> changes?
>
>
>
> Back to the charter...  Should we explicitly list DLEP (not just
> extensions, as Justin pointed out) as one of the deliverables?
>
> Thanks!
>
> Alvaro.
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>

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<div dir=3D"ltr"><div><div>Hi Alvaro,<br></div><div><br>I get distracted by=
 many work items Last-calls/large-volume when they submited without priorit=
y and specially when we work in MANET WG. Is their priority in approving it=
ems/efforts. Management needs priority and clear work path, specially when =
group of remote participants are working.<br><br>I would recommend to your =
management that they focus the recharter to list item works per schedule/pe=
riority. IMHO, in MANET one important job of AODVv2 was not completed becau=
se of past other works that were not listed in charter and no priorities in=
 WG efforts.<br><br>=C2=A0I think that All ADs look into priorities of jobs=
 in each WG and work in line with Chairs, but it is not clear if we don&#39=
;t write it down in your approval. I am sorry that IESG approval has no pri=
orities or words of instructions per recharter, but please advise if I am w=
rong, I just see approvals without conditions and guidance. I think that th=
ere are many work in MANET WG that can be accepted because the group works =
are about mobile protocols, that is a problem. Mobile and dynamic does not =
mean having dynamic in management of our projects. I did mention before abo=
ut not to take many work in MANET WG but the ADs/Chairs did not follow my d=
iscussion on the discuss-list. I think in future work that ADs and chair ne=
ed to follow up seriously with items in each meeting.<br><br></div><div>I t=
hink this WG needs to get approval from IESG of some focused and important =
MANET drafts, one is maintenance of OLSRv2 and other MANET protocol. I prop=
osed before that this WG needs a clear use case which is focused in a draft=
, while the old draft of our manet-use case should be updated as recharter.=
 Only then we can see the priorities per items.=C2=A0 I remember when the D=
LEP item was accepted I was wondering why me=20
as remote participant was not asked to accept or note.=C2=A0 I propose that=
=20
DLEP should not continue in MANET only if the WG completes the multicast
 routing issues (so it should have less priority). <br></div><div><br></div=
>Please IESG look into priority and schedules of work items per WGs. Please=
 draw per recharter a clear approval with guidance and conditions, as it is=
 done in many other organisations. In this way we can force the WG to focus=
 their efforts and times. Still the IESG and IETF WGs are following authors=
 to focus/work, so if the participant is bussy with less periority wg-item =
he/she must give more effort to most-priority and help authors in editting =
that. Please this needs to change especially in our MANET which seems dynam=
ic in work and submission. Overall, WG participants should follow WG-schedu=
les and IESG-approvals per priority.<br><br></div>I advise that this charte=
r needs more focused item works, clear draft (it seems dynamic recharter wi=
th future random flow), How can we fix this dynamic in work submission/list=
s/proposals without priorities or listed items in the charter to be approve=
d. What do you think?<br><div><div><br></div><div>Best Regards<br><br></div=
><div>AB<br></div></div></div><div class=3D"gmail_extra"><br><div class=3D"=
gmail_quote">On Thu, Jun 16, 2016 at 3:51 PM, Alvaro Retana (aretana) <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:aretana@cisco.com" target=3D"_blank">are=
tana@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 6=
/16/16, 8:31 AM, &quot;Stephen Farrell&quot; &lt;<a href=3D"mailto:stephen.=
farrell@cs.tcd.ie">stephen.farrell@cs.tcd.ie</a>&gt; wrote:<br>
<br>
Hi!<br>
<span class=3D""><br>
&gt;&gt;We didn&#39;t explicitly put DLEP in the updated charter (just its<=
br>
&gt;&gt;maintenance) because the work passed WGLC, etc., so (hopefully) the=
 WG is<br>
&gt;&gt;done with the base specification.=C2=A0 I don&#39;t have a problem =
if you think we<br>
&gt;&gt;should explicitly call out DLEP as a deliverable -- I don&#39;t thi=
nk we can<br>
&gt;&gt;put more details in at this point.<br>
&gt;<br>
&gt;Was DLEP ever mentioned before in the MANET WG charter?<br>
<br>
</span>No, but AFAIK manet-type applications where the radio and the router=
 are<br>
not in the same box are the only ones requiring the functionality, which<br=
>
is why the WG took on the work (several years ago) -- and had done other<br=
>
related work before.<br>
<span class=3D""><br>
<br>
&gt;I guess I&#39;m<br>
&gt;wondering if it&#39;s really MANET specific and whether, if it was more=
<br>
&gt;broadly used, it&#39;d also have potential privacy issues.<br>
<br>
</span>Note that while MANET means &quot;mobile..&quot;, mobility is of cou=
rse relative and<br>
anyone can successfully argue that any network &quot;moves&quot;...=C2=A0 S=
o, yes, it<br>
could be used in other scenarios.=C2=A0 One of my review comments was preci=
sely<br>
about that: if DLEP is used outside the expected deployment scenario, what<=
br>
changes?<br>
<br>
<br>
<br>
Back to the charter...=C2=A0 Should we explicitly list DLEP (not just<br>
extensions, as Justin pointed out) as one of the deliverables?<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
Thanks!<br>
<br>
Alvaro.<br>
<br>
_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
</div></div></blockquote></div><br></div>

--001a1149a60a61098c0535a39227--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Abdussalam Baryun <abdussalambaryun@gmail.com>
Thread-Topic: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
Thread-Index: AQHRx808dRYa405TGUKSCC5Bq/PV8J/sDqmAgABcVgD//7HggIAFLHAAgAElm4A=
Date: Mon, 20 Jun 2016 13:23:14 +0000
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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On 6/19/16, 11:52 AM, "Abdussalam Baryun" <abdussalambaryun@gmail.com<mailt=
o:abdussalambaryun@gmail.com>> wrote:

AB:

Hi!  How are you?

I advise that this charter needs more focused item works, clear draft (it s=
eems dynamic recharter with future random flow), How can we fix this dynami=
c in work submission/lists/proposals without priorities or listed items in =
the charter to be approved. What do you think?

I'm sure you've seen the current version of the proposed charter: https://d=
atatracker.ietf.org/doc/charter-ietf-manet/

As you can see, there are specific milestones listed at the bottom, which a=
re the focused work items the WG has agreed on.  I read the milestones as a=
n indication of priorities - with the description in the charter of what th=
e items are.

Do you have specific work items that you think belong on the list?  Or mayb=
e items that you think don't belong?  Or is the milestones indication of pr=
iorities not clear enough?

Thanks!

Alvaro.

--_000_D38D651912F446aretanaciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/19/16, 11:52 AM, &quot;Abdussalam Baryun&quot; &lt;<a href=3D"mai=
lto:abdussalambaryun@gmail.com">abdussalambaryun@gmail.com</a>&gt; wrote:</=
div>
<div><br>
</div>
<div>AB:</div>
<div><br>
</div>
<div>Hi! &nbsp;How are you?</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<span style=3D"color: rgb(0, 0, 0); font-family: -webkit-standard; font-siz=
e: medium; font-style: normal; font-variant: normal; font-weight: normal; l=
etter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: 0px;=
 -webkit-text-stroke-width: 0px; display: inline !important; float: none;">=
I
 advise that this charter needs more focused item works, clear draft (it se=
ems dynamic recharter with future random flow), How can we fix this dynamic=
 in work submission/lists/proposals without priorities or listed items in t=
he charter to be approved. What
 do you think?</span></blockquote>
</span>
<div><br>
</div>
<div>I'm sure you've seen the current version of the proposed charter:&nbsp=
;<a href=3D"https://datatracker.ietf.org/doc/charter-ietf-manet">https://da=
tatracker.ietf.org/doc/charter-ietf-manet</a>/</div>
<div><br>
</div>
<div>As you can see, there are specific milestones listed at the bottom, wh=
ich are the focused work items the WG has agreed on. &nbsp;I read the miles=
tones as an indication of priorities &#8212; with the description in the ch=
arter of what the items are.</div>
<div><br>
</div>
<div>Do you have specific work items that you think belong on the list? &nb=
sp;Or maybe items that you think don't belong? &nbsp;Or is the milestones i=
ndication of priorities not clear enough?</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
</body>
</html>

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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>, Abdussalam Baryun <abdussalambaryun@gmail.com>
Thread-Topic: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Date: Mon, 20 Jun 2016 13:45:48 +0000
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com> <D38D6519.12F446%aretana@cisco.com>
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Cc: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "manet@ietf.org" <manet@ietf.org>, The IESG <iesg@ietf.org>, "manet-chairs@ietf.org" <manet-chairs@ietf.org>
Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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My comment is that the charter wording is the first place I've noticed that=
 it's been "baked in" that the multicast approach is to be based on SMF. SM=
F is good within a MANET, except for the real problems of recognising dupli=
cate packets which is why SMF has multiple incompatible mechanisms there. (=
I presume getting that down to one for each of IPv4 and IPv6 would be a req=
uirement.)

But SMF may not help as much for groups that are inside and outside the MAN=
ET. What's the design space here?

(This also excludes ODMRP, which was in this group many years ago, dropped =
out, resurfaced more recently, then went away again. Is that a decision? - =
I'm not saying it's the wrong one, just wanting to check.)

--
Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com<mailto:chris.de=
arlove@baesystems.com>

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai<http://www.baesystems.com/ai>
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Alvaro Retana (are=
tana)
Sent: 20 June 2016 14:23
To: Abdussalam Baryun
Cc: manet-chairs@ietf.org; manet@ietf.org; The IESG; Stephen Farrell
Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (=
with BLOCK)

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On 6/19/16, 11:52 AM, "Abdussalam Baryun" <abdussalambaryun@gmail.com<mailt=
o:abdussalambaryun@gmail.com>> wrote:

AB:

Hi!  How are you?

I advise that this charter needs more focused item works, clear draft (it s=
eems dynamic recharter with future random flow), How can we fix this dynami=
c in work submission/lists/proposals without priorities or listed items in =
the charter to be approved. What do you think?

I'm sure you've seen the current version of the proposed charter: https://d=
atatracker.ietf.org/doc/charter-ietf-manet/

As you can see, there are specific milestones listed at the bottom, which a=
re the focused work items the WG has agreed on.  I read the milestones as a=
n indication of priorities - with the description in the charter of what th=
e items are.

Do you have specific work items that you think belong on the list?  Or mayb=
e items that you think don't belong?  Or is the milestones indication of pr=
iorities not clear enough?

Thanks!

Alvaro.
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">My comment is that the ch=
arter wording is the first place I&#8217;ve noticed that it&#8217;s been &#=
8220;baked in&#8221; that the multicast approach is to be based on SMF. SMF=
 is good
 within a MANET, except for the real problems of recognising duplicate pack=
ets which is why SMF has multiple incompatible mechanisms there. (I presume=
 getting that down to one for each of IPv4 and IPv6 would be a requirement.=
)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">But SMF may not help as m=
uch for groups that are inside and outside the MANET. What&#8217;s the desi=
gn space here?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">(This also excludes ODMRP=
, which was in this group many years ago, dropped out, resurfaced more rece=
ntly, then went away again. Is that a decision? - I&#8217;m not
 saying it&#8217;s the wrong one, just wanting to check.)<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">--
<o:p></o:p></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#BEBEBE">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007E"><br>
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t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7D7D7D">: &nb=
sp;&#43;44 (0)1245 242194 &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesyst=
ems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007E"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3A8B92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai"><span style=3D"color:#3A8B92">www.=
baesystems.com/ai</span></a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3A8B92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<o:p></o:p></span></p>
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ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<o:p>=
</o:p></span></p>
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<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet [mailto:manet-bounces@ietf.org]
<b>On Behalf Of </b>Alvaro Retana (aretana)<br>
<b>Sent:</b> 20 June 2016 14:23<br>
<b>To:</b> Abdussalam Baryun<br>
<b>Cc:</b> manet-chairs@ietf.org; manet@ietf.org; The IESG; Stephen Farrell=
<br>
<b>Subject:</b> Re: [manet] Stephen Farrell's Block on charter-ietf-manet-0=
3-05: (with BLOCK)<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On 6/19/16, 11:52 AM, &quot=
;Abdussalam Baryun&quot; &lt;<a href=3D"mailto:abdussalambaryun@gmail.com">=
abdussalambaryun@gmail.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">AB:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi! &nbsp;How are you?<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<p class=3D"MsoNormal"><span style=3D"font-size:13.5pt;font-family:&quot;-w=
ebkit-standard&quot;,&quot;serif&quot;;color:black">I advise that this char=
ter needs more focused item works, clear draft (it seems dynamic recharter =
with future random flow), How can we fix this dynamic in
 work submission/lists/proposals without priorities or listed items in the =
charter to be approved. What do you think?</span><span style=3D"font-size:1=
0.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><=
o:p></o:p></span></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I'm sure you've seen the cu=
rrent version of the proposed charter:&nbsp;<a href=3D"https://datatracker.=
ietf.org/doc/charter-ietf-manet">https://datatracker.ietf.org/doc/charter-i=
etf-manet</a>/<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">As you can see, there are s=
pecific milestones listed at the bottom, which are the focused work items t=
he WG has agreed on. &nbsp;I read the milestones as an indication
 of priorities &#8212; with the description in the charter of what the item=
s are.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Do you have specific work i=
tems that you think belong on the list? &nbsp;Or maybe items that you think=
 don't belong? &nbsp;Or is the milestones indication of priorities
 not clear enough?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks!<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Alvaro.<o:p></o:p></span></=
p>
</div>
</div>
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: Christopher Dearlove <christopher.dearlove@gmail.com>, MANET IETF <manet@ietf.org>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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From: Jiazi YI <ietf@jiaziyi.com>
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Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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Dear Chris,

Thanks very much for your detailed review. I have updated the draft
according to your comments.

Please check our reply inline.  A preliminary draft is also attached.

On Mon, Jun 13, 2016 at 11:53 PM, Christopher Dearlove <
christopher.dearlove@gmail.com> wrote:

> I=E2=80=99v looked at draft -09, and I think it still needs work. I have =
some
> followups from previous comments, some new comments, and some editorial
> comments that I didn=E2=80=99t get round to making last time. And this ma=
y not be
> complete, but I=E2=80=99m up against the too short one week limit set. (I=
=E2=80=99m afraid
> we just aren=E2=80=99t getting given the necessary time in this group. An=
d I seem
> to be the only one commenting.)
>
> Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? Not=
 justified. And
> should make it clear this applies to FEC applied across packets, not with=
in
> a packet.
>

removed "very important" to make it more neutral. Clarified that it's FEC
across packets.


>
> Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count
> limited, it=E2=80=99s not even an explicit special case.
>

removed the text related to hop count. We agree that hop count is infamous
:)


>
> Page 5, second bullet. How does FEC help with packet re-ordering?
>

Normally, the packets are coded in different "blocks" and those blocks are
transmitted in different paths. The arriving order of those "blocks" is
less important.

<snip>

> Page 6, first paragraph. I still disagree with characterising as low data
> rate links. At most the protocol multiplies capacity by a small factor, n=
ot
> the orders pf magnitude that link capacities span.
>

We won't claim that there will be orders of magnitude that link capacities
span, but it would be beneficial to have aggregated throughput and load
balancing.

So what do you think of:

MP-OLSRv2 is designed for networks with dynamic topology by avoiding single
route failure. It can also provide higher aggregated throughput and load
balancing, which is beneficial for low data rate links.


>
> RFC0791, I think omitting the 0 is usual style.
>

hmm... actually, the 0 is generated automatically by xml2rfc, as we simply
used the reference to bibxml:

in the reference, we put:

<references title=3D"Normative References">
...
   &RFC791;
...
</references>

and in the begin of the document, we put:

<!ENTITY RFC791 SYSTEM "
http://xml2rfc.ietf.org/public/rfc/bibxml/reference.RFC.0791.xml">

then we got RFC0791 in the draft, because in the xml link provided by IETF,
it's

        <reference anchor=3D"RFC0791" target=3D"
http://www.rfc-editor.org/info/rfc791">


<snip>

>
> The reactive approach in particular has interactions with IP. The
> requirements this protocol imposes on IP need to be documented. (This poi=
nt
> was made about AODVv2, it applies here - the interactions aren=E2=80=99t =
identical,
> but need to be specified.
>

We added the text:

*In the reactive approach, a multi-path algorithm is invoked on demand,
i.e., only when there is a datagram to be sent from the source to the
destination, and there is no available Routing Tuple in the Multi-path
Routing Set. This requires the IP to trigger the multi-path calculation
specified in Section 8.5 when no Multi-path Routing Tuple is available.*

Based on our experience, this is enough. Unlike AODVv2, which needs to wait
for the route discovery), no buffering is required for olsrv2-multipath.


>
> MAX_SRC_HOPS - explain 11.
>

this is due to the limit of IPv4 header length. Explained in the draft.


>
> CUTOFF_RATIO - why strictly greater than one? Should work equal to one.
>

Setting CUTOFF_RATIO to one means looking for disjoint equal length paths.
If we are not using hop-count as metric type, it would be rare to get two
equal metric paths.
We modified the text to "equal to or greater than one", with a note "Note
that setting the value to 1 means looking for equal length paths, which may
not be possible in some networks. "

<snip>

>
> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as =
well (e.g
> Routing Set).
>

Actually, the number of the items in the array PT_address[1...n] already
gives the hop count -- is it necessary to repeat the information with an
additional field? It is not used anyways.

<snip>

>
> Still no discussion of advertised addresses, should they be encouraged in
> TC messages. Except SR required TC messages, see previous proposal on
> strongly recommending against them. I can=E2=80=99t see that added.
>

hmmm... in the text, we now have:

Please note that the TC message generation based on SR_TC_INTERVAL *does
not replace the ordinary TC message generation specified in [RFC7181] and
does not carry any address.* This is due to the fact that not all routers
will generate TC messages based on OLSRv2. The TC generation based on
SR_TC_INTERVAL serves for those routers to advertise SOURCE_ROUTE TLV so
that the other routers can be aware of the source-route enabled routers so
as to be used as destinations of multipath routing. The SR_TC_INTERVAL is
set to a longer value than TC_INTERVAL.

it should be OK, no? Well, it's probably more accurate by saying "*does not
carry any advised address*", because there will be at least originator
address.


> A major omission is discussion of expiry of new Tuples without expiry
> times. If proactive you can (but don=E2=80=99t) discuss when supporting s=
ets
> change.

If reactive it=E2=80=99s rather a mess (a reason I dislike the reactive mec=
hanism).
> When to discard? When to recreate? If dependent on packet flow then that=
=E2=80=99s
> another interaction with IP to document - and implement.


The update of the the Multi-path routing set is described in section 8.6.
The expiry timers are removed since -07 based on the comments received. One
of the reasons is to be consistent with the OLSRv2 routing set, in which no
expiry timer is used.
Generally speaking, in proactive mode, it follows the same mechanism as
OLSRv2: when ever there is a need to update the OLSRv2 routing set, the
multi-path routing set is updated.
In reactive mode, all the Multi-path routing tuples are removed when the
"topology graph" is changed.  The new tuples are recreated "on-demand".


>
> You could when acting reactively forward by usual means in all cases whil=
e
> waiting.
>
> The actual packet forwarding by round-robin is an IP process, not this
> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proces=
s, why
> mandate exactly how it=E2=80=99s used?
>

Choosing which path to put in the source routing header is olsrv2-multipath
specific, because there are multiple of them. Of course, using round-robin
is not mandatory -- using other schedulers won't impact the compatibility.
Actually, we put it as one of the experiment points also:


>
>
>
> * Different path-selection schedulers.  By default, Round-Robin
> scheduling is used to select a path to be used for datagrams.  In      so=
me
> scenarios, weighted scheduling can be considered: for      example, the
> paths with lower metrics (i.e., higher quality) can      transfer more
> datagrams compared to paths with higher metrics.*



>
> Page 12, second bullet. How is this information known? There=E2=80=99s no
> signalling that includes it.
>

The second bullet was:

   o  If the length of the path (n) is greater than MAX_SRC_HOPS, only
      the "key" routers in the path are kept.  The key routers can be
      chosen based on the capacity of the routers (e.g., battery life)
      or the router's willingness in forwarding data.  If no such
      information is available, the key routers are uniformly chosen in
      the path.

The point we want to make is: if there is such information available (based
on metrics or other extensions), it can be used. If no, then choose
uniformly. We rephrased the text a bit:

*  o  If the length of the path (n) is greater than MAX_SRC_HOPS, only the
"key" routers in the path are kept. By default, the key routers are
uniformly chosen in the path. If further information such as capacity of
the routers (e.g., battery life) or the routers' willingness in forwarding
data is available, the routers with higher capacity and willingness are
preferred.*


<snip>



> Section 9, related to not reviewing 8.5.2, it=E2=80=99s not clear how the=
 final
> bullet points arise. And what does =E2=80=9Ctend to=E2=80=9D mean?
>

Those parameters defines different possible settings of multiple paths to
be calculated by using different punish functions.
We added more precise text for this part.

Again, we appreciate your review. If you have any further comments, please
let us know.

regards

Jiazi




>
>

> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>

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<div dir=3D"ltr">Dear Chris,=C2=A0<div><br></div><div>Thanks very much for =
your detailed review. I have updated the draft according to your comments.<=
/div><div><br></div><div>Please check our reply inline.=C2=A0 A preliminary=
 draft is also attached.=C2=A0</div><div><div class=3D"gmail_extra"><br><di=
v class=3D"gmail_quote">On Mon, Jun 13, 2016 at 11:53 PM, Christopher Dearl=
ove <span dir=3D"ltr">&lt;<a href=3D"mailto:christopher.dearlove@gmail.com"=
 target=3D"_blank">christopher.dearlove@gmail.com</a>&gt;</span> wrote:<br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex">I=E2=80=99v looked at draft -09, and I think it still need=
s work. I have some followups from previous comments, some new comments, an=
d some editorial comments that I didn=E2=80=99t get round to making last ti=
me. And this may not be complete, but I=E2=80=99m up against the too short =
one week limit set. (I=E2=80=99m afraid we just aren=E2=80=99t getting give=
n the necessary time in this group. And I seem to be the only one commentin=
g.)<br>
<br>
Section 1.1, fifth bullet, =E2=80=9Cvery important=E2=80=9D. To whom? Not j=
ustified. And should make it clear this applies to FEC applied across packe=
ts, not within a packet.<br></blockquote><div><br></div><div>removed &quot;=
very important&quot; to make it more neutral. Clarified that it&#39;s FEC a=
cross packets.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color=
:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<br>
Page 4, third bullet, why discuss hop count? OLSRv2 is not hop count limite=
d, it=E2=80=99s not even an explicit special case.<br></blockquote><div><br=
></div><div>removed the text related to hop count. We agree that hop count =
is infamous :)</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(2=
04,204,204);border-left-style:solid;padding-left:1ex">
<br>
Page 5, second bullet. How does FEC help with packet re-ordering?<br></bloc=
kquote><div><br></div><div>Normally, the packets are coded in different &qu=
ot;blocks&quot; and those blocks are transmitted in different paths. The ar=
riving order of those &quot;blocks&quot; is less important.=C2=A0</div><div=
>=C2=A0</div><div>&lt;snip&gt;</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(20=
4,204,204);border-left-style:solid;padding-left:1ex">
Page 6, first paragraph. I still disagree with characterising as low data r=
ate links. At most the protocol multiplies capacity by a small factor, not =
the orders pf magnitude that link capacities span.<br></blockquote><div><br=
></div><div>We won&#39;t claim that there will be orders of magnitude that =
link capacities span, but it would be beneficial to have aggregated through=
put and load balancing.=C2=A0</div><div><br></div><div>So what do you think=
 of:</div><div><br></div><div><span style=3D"white-space:pre-wrap">			</spa=
n>MP-OLSRv2 is designed for networks with dynamic topology by avoiding sing=
le route failure. It can also provide higher aggregated throughput and load=
 balancing, which is beneficial for low data rate links. =C2=A0</div><div>=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-s=
tyle:solid;padding-left:1ex">
<br>
RFC0791, I think omitting the 0 is usual style.<br></blockquote><div><br></=
div><div>hmm... actually, the 0 is generated automatically by xml2rfc, as w=
e simply used the reference to bibxml:</div><div><br></div><div>in the refe=
rence, we put:</div><div><br></div><div><div>&lt;references title=3D&quot;N=
ormative References&quot;&gt;</div><div>...=C2=A0</div><div>=C2=A0=C2=A0 &a=
mp;RFC791;</div><div>...<br></div><div>&lt;/references&gt;</div></div><div>=
=C2=A0</div><div>and in the begin of the document, we put:</div><div><br></=
div><div>&lt;!ENTITY RFC791 SYSTEM &quot;<a href=3D"http://xml2rfc.ietf.org=
/public/rfc/bibxml/reference.RFC.0791.xml" target=3D"_blank">http://xml2rfc=
.ietf.org/public/rfc/bibxml/reference.RFC.0791.xml</a>&quot;&gt;<br></div><=
div><br></div><div>then we got RFC0791 in the draft, because in the xml lin=
k provided by IETF, it&#39;s=C2=A0</div><div><br></div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 &lt;reference anchor=3D&quot;RFC0791&quot; target=3D&quot;<a =
href=3D"http://www.rfc-editor.org/info/rfc791" target=3D"_blank">http://www=
.rfc-editor.org/info/rfc791</a>&quot;&gt;<br></div><div><br></div><div><br>=
</div><div>&lt;snip&gt;=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(20=
4,204,204);border-left-style:solid;padding-left:1ex">
<br>
The reactive approach in particular has interactions with IP. The requireme=
nts this protocol imposes on IP need to be documented. (This point was made=
 about AODVv2, it applies here - the interactions aren=E2=80=99t identical,=
 but need to be specified.<br></blockquote><div><br></div><div>We added the=
 text:</div><div><br></div><div><i>In the reactive approach, a multi-path a=
lgorithm is invoked on demand, i.e., only when there is a datagram to be se=
nt from the source to the destination, and there is no available Routing Tu=
ple in the Multi-path Routing Set. This requires the IP to trigger the mult=
i-path calculation specified in Section 8.5 when no Multi-path Routing Tupl=
e is available.</i><br></div><div><br></div><div>Based on our experience, t=
his is enough. Unlike AODVv2, which needs to wait for the route discovery),=
 no buffering is required for olsrv2-multipath.=C2=A0</div><div>=C2=A0</div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;=
padding-left:1ex">
<br>
MAX_SRC_HOPS - explain 11.<br></blockquote><div><br></div><div>this is due =
to the limit of IPv4 header length. Explained in the draft.=C2=A0</div><div=
>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-=
style:solid;padding-left:1ex">
<br>
CUTOFF_RATIO - why strictly greater than one? Should work equal to one.<br>=
</blockquote><div><br></div><div>Setting CUTOFF_RATIO to one means looking =
for disjoint equal length paths. If we are not using hop-count as metric ty=
pe, it would be rare to get two equal metric paths.=C2=A0</div><div>We modi=
fied the text to &quot;equal to or greater than one&quot;, with a note &quo=
t;Note that setting the value to 1 means looking for equal length paths, wh=
ich may not be possible in some networks. &quot;</div><div>=C2=A0</div><div=
>&lt;snip&gt;=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:=
0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);=
border-left-style:solid;padding-left:1ex">
<br>
PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as we=
ll (e.g Routing Set).<br></blockquote><div><br></div><div>Actually, the num=
ber of the items in the array PT_address[1...n] already gives the hop count=
 -- is it necessary to repeat the information with an additional field? It =
is not used anyways.=C2=A0</div><div>=C2=A0</div><div>&lt;snip&gt;=C2=A0</d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:soli=
d;padding-left:1ex">
<br>
Still no discussion of advertised addresses, should they be encouraged in T=
C messages. Except SR required TC messages, see previous proposal on strong=
ly recommending against them. I can=E2=80=99t see that added.<br></blockquo=
te><div><br></div><div>hmmm... in the text, we now have:</div><div><br></di=
v><div>Please note that the TC message generation based on SR_TC_INTERVAL <=
b>does not replace the ordinary TC message generation specified in [RFC7181=
] and<font color=3D"#ff0000"> does not carry any address</font>.</b> This i=
s due to the fact that not all routers will generate TC messages based on O=
LSRv2. The TC generation based on SR_TC_INTERVAL serves for those routers t=
o advertise SOURCE_ROUTE TLV so that the other routers can be aware of the =
source-route enabled routers so as to be used as destinations of multipath =
routing. The SR_TC_INTERVAL is set to a longer value than TC_INTERVAL.<br><=
/div><div><br></div><div>it should be OK, no? Well, it&#39;s probably more =
accurate by saying &quot;<b>does not carry any advised address</b>&quot;, b=
ecause there will be at least originator address. =C2=A0</div><div><br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid=
;padding-left:1ex"><br>
A major omission is discussion of expiry of new Tuples without expiry times=
. If proactive you can (but don=E2=80=99t) discuss when supporting sets cha=
nge.=C2=A0</blockquote><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);bo=
rder-left-style:solid;padding-left:1ex">If reactive it=E2=80=99s rather a m=
ess (a reason I dislike the reactive mechanism). When to discard? When to r=
ecreate? If dependent on packet flow then that=E2=80=99s another interactio=
n with IP to document - and implement.</blockquote><div><br></div><div>The =
update of the the Multi-path routing set is described in section 8.6. The e=
xpiry timers are removed since -07 based on the comments received. One of t=
he reasons is to be consistent with the OLSRv2 routing set, in which no exp=
iry timer is used.=C2=A0</div><div>Generally speaking, in proactive mode, i=
t follows the same mechanism as OLSRv2: when ever there is a need to update=
 the OLSRv2 routing set, the multi-path routing set is updated.=C2=A0</div>=
<div>In reactive mode, all the Multi-path routing tuples are removed when t=
he &quot;topology graph&quot; is changed.=C2=A0 The new tuples are recreate=
d &quot;on-demand&quot;.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-=
left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<br></blockquote><div><br></div><div=
>Choosing which path to put in the source routing header is olsrv2-multipat=
h specific, because there are multiple of them. Of course, using round-robi=
n is not mandatory -- using other schedulers won&#39;t impact the compatibi=
lity. Actually, we put it as one of the experiment points also:</div><div><=
br></div><div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left=
-style:solid;padding-left:1ex"><i>=C2=A0Different path-selection schedulers=
.=C2=A0 By default, Round-Robin<br>=C2=A0 =C2=A0 =C2=A0 scheduling is used =
to select a path to be used for datagrams.=C2=A0 In<br>=C2=A0 =C2=A0 =C2=A0=
 some scenarios, weighted scheduling can be considered: for<br>=C2=A0 =C2=
=A0 =C2=A0 example, the paths with lower metrics (i.e., higher quality) can=
<br>=C2=A0 =C2=A0 =C2=A0 transfer more datagrams compared to paths with hig=
her metrics.</i></blockquote></div><div>=C2=A0</div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-l=
eft-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<br>
Page 12, second bullet. How is this information known? There=E2=80=99s no s=
ignalling that includes it.<br></blockquote><div><br></div><div>The second =
bullet was:</div><div><br></div><div><div>=C2=A0 =C2=A0o =C2=A0If the lengt=
h of the path (n) is greater than MAX_SRC_HOPS, only</div><div>=C2=A0 =C2=
=A0 =C2=A0 the &quot;key&quot; routers in the path are kept.=C2=A0 The key =
routers can be</div><div>=C2=A0 =C2=A0 =C2=A0 chosen based on the capacity =
of the routers (e.g., battery life)</div><div>=C2=A0 =C2=A0 =C2=A0 or the r=
outer&#39;s willingness in forwarding data.=C2=A0 If no such</div><div>=C2=
=A0 =C2=A0 =C2=A0 information is available, the key routers are uniformly c=
hosen in</div><div>=C2=A0 =C2=A0 =C2=A0 the path.</div></div><div><br></div=
><div>The point we want to make is: if there is such information available =
(based on metrics or other extensions), it can be used. If no, then choose =
uniformly. We rephrased the text a bit:</div><div><br></div><div><i>=C2=A0 =
o =C2=A0If the length of the path (n) is greater than MAX_SRC_HOPS, only th=
e &quot;key&quot; routers in the path are kept. By default, the key routers=
 are uniformly chosen in the path. If further information such as capacity =
of the routers (e.g., battery life) or the routers&#39; willingness in forw=
arding data is available, the routers with higher capacity and willingness =
are preferred.</i><br></div><div>=C2=A0</div><div><br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;=
border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex=
">&lt;snip&gt;</blockquote><div>=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-colo=
r:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Section 9, rel=
ated to not reviewing 8.5.2, it=E2=80=99s not clear how the final bullet po=
ints arise. And what does =E2=80=9Ctend to=E2=80=9D mean?<br></blockquote><=
div><br></div><div>Those parameters defines different possible settings of =
multiple paths to be calculated by using different punish functions.=C2=A0<=
/div><div>We added more precise text for this part.=C2=A0</div><div><br></d=
iv><div>Again, we appreciate your review. If you have any further comments,=
 please let us know.=C2=A0</div><div><br></div><div>regards</div><div><br><=
/div><div>Jiazi</div><div><br></div><div><br></div><div>=C2=A0</div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-wi=
dth:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-=
left:1ex">=C2=A0<br></blockquote><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,2=
04,204);border-left-style:solid;padding-left:1ex">
<br>
_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org" target=3D"_blank">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
</blockquote></div><br></div></div></div>

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Stephen Farrell has entered the following ballot position for
charter-ietf-manet-03-06: No Objection

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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thanks for handling my DLEP comment.



From nobody Mon Jun 20 07:45:44 2016
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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
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On 6/20/16, 9:45 AM, "iesg on behalf of Dearlove, Christopher (UK)" <iesg-b=
ounces@ietf.org<mailto:iesg-bounces@ietf.org> on behalf of chris.dearlove@b=
aesystems.com<mailto:chris.dearlove@baesystems.com>> wrote:

[Took the IESG off as there's no need for them in this discussion.]

Christopher:

Hi!

My comment is that the charter wording is the first place I've noticed that=
 it's been "baked in" that the multicast approach is to be based on SMF. SM=
F is good within a MANET, except for the real problems of recognising dupli=
cate packets which is why SMF has multiple incompatible mechanisms there. (=
I presume getting that down to one for each of IPv4 and IPv6 would be a req=
uirement.)

But SMF may not help as much for groups that are inside and outside the MAN=
ET. What's the design space here?

(This also excludes ODMRP, which was in this group many years ago, dropped =
out, resurfaced more recently, then went away again. Is that a decision? - =
I'm not saying it's the wrong one, just wanting to check.)

The charter text that was discussed on the list said: "The MANET WG will st=
andardize a multicast MANET protocol framework based on previous work and l=
essons learned for scoped forwarding within MANET networks."

When reviewing it with the chairs, I asked: "Will SMF be used as a base ("b=
ased on previous work and lessons learned") or what?  If so, let's call it =
out."  That resulted in: "Standardize a multicast MANET protocol framework =
based on Simplified Multicast Forwarding [RFC 6621] for scoped forwarding w=
ithin MANET networks."

I think a charter should be as specific and focused as possible, which is w=
hy I asked the question.  However, it is just a starting point - if, as you=
 point out, there are issues that the WG should consider and decides that S=
MF is not the way to go then that will be the consensus and the way forward=
.  Even if specific, the charter is not meant to solve the work items for t=
he WG.  In other words, I don't think that calling out a starting point sho=
uld preclude the WG from deciding to use a different base.

Having said that, if you have better wording that is not as vague as "based=
 on previous work and lessons learned", and doesn't require the listing of =
every possible starting point (I'm sure there may be others besides ODMRP),=
 please suggest it.  We still have to time to play with words.

The question about the design space is again one that the WG will have to r=
esolve.  One of the potential outcomes (obviously!) is to treat inside and =
outside as separate problems (just an observation as a WG participant) -- t=
he latest version [1] (resulting from the BLOCK) includes a little text abo=
ut the manet WG interacting with others on potentially common issues, in th=
is case the pim WG.  That doesn't mean that you must agree with the pim WG =
on every step, but that they are a resource that could be used because they=
 too have done previous work on multicast and have learned from it.

Thanks!

Alvaro.

[1] https://datatracker.ietf.org/doc/charter-ietf-manet/

--_000_D38D735712F4BAaretanaciscocom_
Content-Type: text/html; charset="iso-8859-1"
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/20/16, 9:45 AM, &quot;iesg on behalf of Dearlove, Christopher (UK=
)&quot; &lt;<a href=3D"mailto:iesg-bounces@ietf.org">iesg-bounces@ietf.org<=
/a> on behalf of
<a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesystems.=
com</a>&gt; wrote:</div>
<div><br>
</div>
<div>[Took the IESG off as there's no need for them in this discussion.]</d=
iv>
<div><br>
</div>
<div>Christopher:</div>
<div><br>
</div>
<div>Hi!</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">My comment is that the charter wording is the first place =
I&#8217;ve noticed that it&#8217;s been &#8220;baked in&#8221; that the mul=
ticast approach is to be based on SMF. SMF is good within
 a MANET, except for the real problems of recognising duplicate packets whi=
ch is why SMF has multiple incompatible mechanisms there. (I presume gettin=
g that down to one for each of IPv4 and IPv6 would be a requirement.)<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">But SMF may not help as much for groups that are inside an=
d outside the MANET. What&#8217;s the design space here?<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">(This also excludes ODMRP, which was in this group many ye=
ars ago, dropped out, resurfaced more recently, then went away again. Is th=
at a decision? - I&#8217;m not saying it&#8217;s
 the wrong one, just wanting to check.)</span></p>
</blockquote>
</span>
<div><br>
</div>
<div>The charter text that was discussed on the list said: &quot;The MANET =
WG will standardize a multicast MANET protocol framework based on previous =
work and lessons learned for scoped forwarding within MANET networks.&quot;=
</div>
<div><br>
</div>
<div>When reviewing it with the chairs, I asked: &quot;Will SMF be used as =
a base (&quot;based on previous work and lessons learned&quot;) or what? &n=
bsp;If so, let's call it out.&quot; &nbsp;That resulted in: &quot;Standardi=
ze a multicast MANET protocol framework based on Simplified Multicast
 Forwarding [RFC 6621] for scoped forwarding within MANET networks.&quot;</=
div>
<div><br>
</div>
<div>I think a charter should be as specific and focused as possible, which=
 is why I asked the question. &nbsp;However, it is just a starting point &#=
8212; if, as you point out, there are issues that the WG should consider an=
d decides that SMF is not the way to go then
 that will be the consensus and the way forward. &nbsp;Even if specific, th=
e charter is not meant to solve the work items for the WG. &nbsp;In other w=
ords, I don't think that calling out a starting point should preclude the W=
G from deciding to use a different base.</div>
<div><br>
</div>
<div>Having said that, if you have better wording that is not as vague as&n=
bsp;&quot;based on previous work and lessons learned&quot;, and doesn't req=
uire the listing of every possible starting point (I'm sure there may be ot=
hers besides ODMRP), please suggest it. &nbsp;We still
 have to time to play with words.</div>
<div><br>
</div>
<div>The question about the design space is again one that the WG will have=
 to resolve. &nbsp;One of the potential outcomes (obviously!) is to treat i=
nside and outside as separate problems (just an observation as a WG partici=
pant) -- the latest version [1] (resulting
 from the BLOCK) includes a little text about the manet WG interacting with=
 others on potentially common issues, in this case the pim WG. &nbsp;That d=
oesn't mean that you must agree with the pim WG on every step, but that the=
y are a resource that could be used because
 they too have done previous work on multicast and have learned from it.</d=
iv>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
<div><br>
</div>
<div>[1]&nbsp;<a href=3D"https://datatracker.ietf.org/doc/charter-ietf-mane=
t">https://datatracker.ietf.org/doc/charter-ietf-manet</a>/&nbsp;</div>
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>
Thread-Topic: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Date: Mon, 20 Jun 2016 14:51:33 +0000
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com> <D38D6519.12F446%aretana@cisco.com> <B31EEDDDB8ED7E4A93FDF12A4EECD30D923D11E9@GLKXM0002V.GREENLNK.net> <D38D7357.12F4BA%aretana@cisco.com>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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(Yes, I should have removed the IESG. Apologies for that - though they won'=
t see the apology.)

I think I might use different words than "based on". I appreciate we don't =
want to ignore SMF, and if we can manage a good uniqueness test I think it'=
s a good solution for its part of the problem. But because of the "if" and =
"part" I'd use perhaps "starting from".

But it is the position rather than the words that really matter, and you've=
 summarised the position.

--
Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com<mailto:chris.de=
arlove@baesystems.com>

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai<http://www.baesystems.com/ai>
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

From: Alvaro Retana (aretana) [mailto:aretana@cisco.com]
Sent: 20 June 2016 15:46
To: Dearlove, Christopher (UK)
Cc: manet@ietf.org; manet-chairs@ietf.org
Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (=
with BLOCK)


*** WARNING ***
This message originates from outside our organisation, either from an exter=
nal partner or the internet.
Consider carefully whether you should click on any links, open any attachme=
nts or reply.
For information regarding Red Flags that you can look out for in emails you=
 receive, click here<http://intranet.ent.baesystems.com/howwework/security/=
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ith%20Suspicious%20Emails.pdf>.
On 6/20/16, 9:45 AM, "iesg on behalf of Dearlove, Christopher (UK)" <iesg-b=
ounces@ietf.org<mailto:iesg-bounces@ietf.org> on behalf of chris.dearlove@b=
aesystems.com<mailto:chris.dearlove@baesystems.com>> wrote:

[Took the IESG off as there's no need for them in this discussion.]

Christopher:

Hi!

My comment is that the charter wording is the first place I've noticed that=
 it's been "baked in" that the multicast approach is to be based on SMF. SM=
F is good within a MANET, except for the real problems of recognising dupli=
cate packets which is why SMF has multiple incompatible mechanisms there. (=
I presume getting that down to one for each of IPv4 and IPv6 would be a req=
uirement.)

But SMF may not help as much for groups that are inside and outside the MAN=
ET. What's the design space here?

(This also excludes ODMRP, which was in this group many years ago, dropped =
out, resurfaced more recently, then went away again. Is that a decision? - =
I'm not saying it's the wrong one, just wanting to check.)

The charter text that was discussed on the list said: "The MANET WG will st=
andardize a multicast MANET protocol framework based on previous work and l=
essons learned for scoped forwarding within MANET networks."

When reviewing it with the chairs, I asked: "Will SMF be used as a base ("b=
ased on previous work and lessons learned") or what?  If so, let's call it =
out."  That resulted in: "Standardize a multicast MANET protocol framework =
based on Simplified Multicast Forwarding [RFC 6621] for scoped forwarding w=
ithin MANET networks."

I think a charter should be as specific and focused as possible, which is w=
hy I asked the question.  However, it is just a starting point - if, as you=
 point out, there are issues that the WG should consider and decides that S=
MF is not the way to go then that will be the consensus and the way forward=
.  Even if specific, the charter is not meant to solve the work items for t=
he WG.  In other words, I don't think that calling out a starting point sho=
uld preclude the WG from deciding to use a different base.

Having said that, if you have better wording that is not as vague as "based=
 on previous work and lessons learned", and doesn't require the listing of =
every possible starting point (I'm sure there may be others besides ODMRP),=
 please suggest it.  We still have to time to play with words.

The question about the design space is again one that the WG will have to r=
esolve.  One of the potential outcomes (obviously!) is to treat inside and =
outside as separate problems (just an observation as a WG participant) -- t=
he latest version [1] (resulting from the BLOCK) includes a little text abo=
ut the manet WG interacting with others on potentially common issues, in th=
is case the pim WG.  That doesn't mean that you must agree with the pim WG =
on every step, but that they are a resource that could be used because they=
 too have done previous work on multicast and have learned from it.

Thanks!

Alvaro.

[1] https://datatracker.ietf.org/doc/charter-ietf-manet/
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">(Yes, I should have remov=
ed the IESG. Apologies for that - though they won&#8217;t see the apology.)=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think I might use diffe=
rent words than &#8220;based on&#8221;. I appreciate we don&#8217;t want to=
 ignore SMF, and if we can manage a good uniqueness test I think it&#8217;s=
 a good
 solution for its part of the problem. But because of the &#8220;if&#8221; =
and &#8220;part&#8221; I&#8217;d use perhaps &#8220;starting from&#8221;.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">But it is the position ra=
ther than the words that really matter, and you&#8217;ve summarised the pos=
ition.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">--
<o:p></o:p></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#BEBEBE">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007E"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7D7D7D">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7D7D7D">: &nb=
sp;&#43;44 (0)1245 242194 &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesyst=
ems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007E"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3A8B92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai"><span style=3D"color:#3A8B92">www.=
baesystems.com/ai</span></a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3A8B92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> Alvaro Retana (aretana) [mailto:aretana@cisco.com]
<br>
<b>Sent:</b> 20 June 2016 15:46<br>
<b>To:</b> Dearlove, Christopher (UK)<br>
<b>Cc:</b> manet@ietf.org; manet-chairs@ietf.org<br>
<b>Subject:</b> Re: [manet] Stephen Farrell's Block on charter-ietf-manet-0=
3-05: (with BLOCK)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On 6/20/16, 9:45 AM, &quot;=
iesg on behalf of Dearlove, Christopher (UK)&quot; &lt;<a href=3D"mailto:ie=
sg-bounces@ietf.org">iesg-bounces@ietf.org</a> on behalf of
<a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesystems.=
com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[Took the IESG off as there=
's no need for them in this discussion.]<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Christopher:<o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi!<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<p class=3D"MsoNormal" style=3D"orphans: auto;text-align:start;widows: auto=
;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#1F497D">My comment is that the charter wording is the fi=
rst place I&#8217;ve noticed that it&#8217;s been &#8220;baked in&#8221; th=
at the multicast approach is to be based on SMF. SMF is good within a MANET=
, except
 for the real problems of recognising duplicate packets which is why SMF ha=
s multiple incompatible mechanisms there. (I presume getting that down to o=
ne for each of IPv4 and IPv6 would be a requirement.)</span><span style=3D"=
color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"orphans: auto;text-align:start;widows: auto=
;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"orphans: auto;text-align:start;widows: auto=
;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#1F497D">But SMF may not help as much for groups that are=
 inside and outside the MANET. What&#8217;s the design space here?</span><s=
pan style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"orphans: auto;text-align:start;widows: auto=
;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"orphans: auto;text-align:start;widows: auto=
;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#1F497D">(This also excludes ODMRP, which was in this gro=
up many years ago, dropped out, resurfaced more recently, then went away ag=
ain. Is that a decision? - I&#8217;m not saying it&#8217;s the wrong
 one, just wanting to check.)</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">The charter text that was d=
iscussed on the list said: &quot;The MANET WG will standardize a multicast =
MANET protocol framework based on previous work and lessons learned
 for scoped forwarding within MANET networks.&quot;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">When reviewing it with the =
chairs, I asked: &quot;Will SMF be used as a base (&quot;based on previous =
work and lessons learned&quot;) or what? &nbsp;If so, let's call it out.&qu=
ot; &nbsp;That
 resulted in: &quot;Standardize a multicast MANET protocol framework based =
on Simplified Multicast Forwarding [RFC 6621] for scoped forwarding within =
MANET networks.&quot;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I think a charter should be=
 as specific and focused as possible, which is why I asked the question. &n=
bsp;However, it is just a starting point &#8212; if, as you point out,
 there are issues that the WG should consider and decides that SMF is not t=
he way to go then that will be the consensus and the way forward. &nbsp;Eve=
n if specific, the charter is not meant to solve the work items for the WG.=
 &nbsp;In other words, I don't think that
 calling out a starting point should preclude the WG from deciding to use a=
 different base.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Having said that, if you ha=
ve better wording that is not as vague as&nbsp;&quot;based on previous work=
 and lessons learned&quot;, and doesn't require the listing of every possib=
le
 starting point (I'm sure there may be others besides ODMRP), please sugges=
t it. &nbsp;We still have to time to play with words.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">The question about the desi=
gn space is again one that the WG will have to resolve. &nbsp;One of the po=
tential outcomes (obviously!) is to treat inside and outside
 as separate problems (just an observation as a WG participant) -- the late=
st version [1] (resulting from the BLOCK) includes a little text about the =
manet WG interacting with others on potentially common issues, in this case=
 the pim WG. &nbsp;That doesn't mean
 that you must agree with the pim WG on every step, but that they are a res=
ource that could be used because they too have done previous work on multic=
ast and have learned from it.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks!<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Alvaro.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[1]&nbsp;<a href=3D"https:/=
/datatracker.ietf.org/doc/charter-ietf-manet">https://datatracker.ietf.org/=
doc/charter-ietf-manet</a>/&nbsp;<o:p></o:p></span></p>
</div>
</div>
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You should not copy it or use it for any purpose nor disclose or<br>
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--_000_B31EEDDDB8ED7E4A93FDF12A4EECD30D923D1304GLKXM0002VGREEN_--


From nobody Mon Jun 20 09:21:26 2016
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Subject: [manet] WG Review: Mobile Ad-hoc Networks (manet)
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The Mobile Ad-hoc Networks (manet) WG in the Routing Area of the IETF is
undergoing rechartering. The IESG has not made any determination yet. The
following draft charter was submitted, and is provided for informational
purposes only. Please send your comments to the IESG mailing list
(iesg@ietf.org) by 2016-06-30.

Mobile Ad-hoc Networks (manet)
-----------------------------------------------------------------------
Current status: Active WG

Chairs:
  Stan Ratliff <sratliff@idirect.net>
  Justin Dean <bebemaster@gmail.com>

Secretaries:
  Ulrich Herberg <ulrich@herberg.name>

Assigned Area Director:
  Alvaro Retana <aretana@cisco.com>

Routing Area Directors:
  Alia Atlas <akatlas@gmail.com>
  Alvaro Retana <aretana@cisco.com>
  Deborah Brungard <db3546@att.com>
 
Mailing list:
  Address: manet@ietf.org
  To subscribe: https://www.ietf.org/mailman/listinfo/manet
  Archive: https://mailarchive.ietf.org/arch/browse/manet/

Charter: https://datatracker.ietf.org/doc/charter-ietf-manet/

The purpose of the MANET working group is to standardize IP routing 
protocol functionality suitable for wireless routing applications within 
both static and dynamic topologies with increased dynamics due to 
node motion or other factors.  

Approaches are intended to be relatively lightweight in nature, suitable 
for multiple hardware and wireless environments, and address 
scenarios where MANETs are deployed at the edges of an IP 
infrastructure. Hybrid mesh infrastructures (e.g., a mixture of fixed and
mobile routers) should also be supported by MANET specifications and 
management features.

When routing devices rely on modems to effect communications over
wireless links, they need timely and accurate knowledge of the
characteristics of the link (speed, state, etc.) in order to make
routing decisions.  In mobile or other environments where these
characteristics change frequently, manual configurations or the
inference of state through routing or transport protocols does not
allow the router to make the best decisions.  The WG will put 
special attention on the standardization of a bidirectional, 
dynamic link exchange protocol (DLEP) between the router and the modem.

The MANET WG will coordinate with other Working Groups, such as the 
pim WG for multicast support, and the Routing Area WG (rtgwg), OSPF
WG and Babel WG on the general use of DLEP.

The MANET WG is responsible for the maintenance of OLSRv2 [RFC 7181],
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format
[RFC5444], and their extensions.

Work Items:

- Develop a dynamic link exchange protocol (DLEP).

- DLEP extension to provide a credit-windowing scheme for 
destination-specific flow control.

- DLEP extensions for reporting statistics by traffic classification.

- Multicast MANET protocol framework based on Simplified Multicast 
Forwarding [RFC 6621] for scoped forwarding within MANET networks.  
As part of this framework the WG will produce a well defined MANET 
multicast forwarding information base (FIB).

- Document outlining challenges and best practices for deploying and 
managing MANET networks.  

Milestones:
  Nov 2016 - MANET Management Document (Informational)
  Nov 2016 - DLEP Credit Windowing Extensions (Standards Track)
  Nov 2016 - DLEP (Standards Track)
  Jul 2017 - DLEP traffic extensions (Standards Track)
  Nov 2017 - Multicast FIB (Standards Track)



From nobody Mon Jun 20 09:53:40 2016
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com> <D38D6519.12F446%aretana@cisco.com>
From: Abdussalam Baryun <abdussalambaryun@gmail.com>
Date: Mon, 20 Jun 2016 19:53:32 +0300
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To: "Alvaro Retana (aretana)" <aretana@cisco.com>
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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--001a114e7a3c7b271a0535b88b06
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Hi Alvaro,

I am ok, unfortunately I cannot attend this meeting because I am fasting
Ramadan, but hope to join in other opportunities.

On Mon, Jun 20, 2016 at 4:23 PM, Alvaro Retana (aretana) <aretana@cisco.com=
>
wrote:

> On 6/19/16, 11:52 AM, "Abdussalam Baryun" <abdussalambaryun@gmail.com>
> wrote:
>
> AB:
>
> Hi!  How are you?
>
> I advise that this charter needs more focused item works, clear draft (it
> seems dynamic recharter with future random flow), How can we fix this
> dynamic in work submission/lists/proposals without priorities or listed
> items in the charter to be approved. What do you think?
>
>
> I'm sure you've seen the current version of the proposed charter:
> https://datatracker.ietf.org/doc/charter-ietf-manet/
>

yes

>
> As you can see, there are specific milestones listed at the bottom, which
> are the focused work items the WG has agreed on.  I read the milestones a=
s
> an indication of priorities =E2=80=94 with the description in the charter=
 of what
> the items are.
>

Milestones in my opinion are not priority indications, because in project
management work-items mostly work in parallel, so milestones do not show
priority, and in the past practice of MANET WG there are many later
milestones that were advanced old milestones. I suggest that IETF and IESG
change plans for approvals to add priority especial for groups like MANET
WG.


>
> Do you have specific work items that you think belong on the list?  Or
> maybe items that you think don't belong?  Or is the milestones indication
> of priorities not clear enough?
>

Yes, we worked MANET unicast manet routing; reactive and proactive,
experimentals and standards but submitted successfully only the proactive
as standard, so we need to work multicast manet routing now. So we need
multicast reactive and multicast proactive routing, usually multicast
routing is the most important routing in MANET environment. However, it was
a great plan that MANET WG started in the past with unicast and now the new
issue is multicast routing. We need multicast for reactive routing and
multicast for proactive, we got a proposal before for a multicast routing
which was presented in IETF89 meeting.

Therefore, this group needs to focus on two new routing: 1- Multicast
Reactive Routing, 2- Multicast Proactive Routing, in addition we may add 3-
Hybrid Routing. The multicast routing is with high priority, because we
only have very simple multicast, which MANET needs multicast because most
use cases depend on group communication.

IMHO, our group needs an information draft for MANET considerations and use
cases. We had separate considerations in RFCs and we need to add uses of
our past done protocols and looking to the future work use cases. This
draft needs to work in parallel with updating RFC2501, which needs update
specially that it ignore the new MANET packet and MANET interfaces. For
example, in MANET WG the 5148 was just for jitter, and to solve issues
related to a protocol, but we need a full picture of other considerations,
and one place to have all consideration, not many documents with
considerations. However, we need to separate a one item that covers MANET
security considerations related to the MANET protocol, and security related
to the MANET packet. Therefore, my overall suggestion is that the work
items with priority are as follows:

1- MANET considerations and use cases   (highest priority, p=3D1)
2- update of RFC2501     (p=3D2)
3- Multicast Reactive Routing (p=3D3)
4- Multicast Proactive Routing (p=3D3)
5- MANET security considerations (p=3D4)
6- Maintenance of OLSRv2 (p=3D3)

Best Regards
AB


AB


>

--001a114e7a3c7b271a0535b88b06
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi Alvaro,<br><br></div>I am ok, unfortunately I cann=
ot attend this meeting because I am fasting Ramadan, but hope to join in ot=
her opportunities. <br><div class=3D"gmail_extra"><br><div class=3D"gmail_q=
uote">On Mon, Jun 20, 2016 at 4:23 PM, Alvaro Retana (aretana) <span dir=3D=
"ltr">&lt;<a href=3D"mailto:aretana@cisco.com" target=3D"_blank">aretana@ci=
sco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>On 6/19/16, 11:52 AM, &quot;Abdussalam Baryun&quot; &lt;<a href=3D"mai=
lto:abdussalambaryun@gmail.com" target=3D"_blank">abdussalambaryun@gmail.co=
m</a>&gt; wrote:</div>
<div><br>
</div>
<div>AB:</div>
<div><br>
</div>
<div>Hi!=C2=A0 How are you?</div><span class=3D"">
<span>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<span style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-size:medi=
um;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:=
normal;text-align:start;text-indent:0px;text-transform:none;white-space:nor=
mal;word-spacing:0px;display:inline!important;float:none">I
 advise that this charter needs more focused item works, clear draft (it se=
ems dynamic recharter with future random flow), How can we fix this dynamic=
 in work submission/lists/proposals without priorities or listed items in t=
he charter to be approved. What
 do you think?</span></blockquote>
</span>
<div><br>
</div>
</span><div>I&#39;m sure you&#39;ve seen the current version of the propose=
d charter:=C2=A0<a href=3D"https://datatracker.ietf.org/doc/charter-ietf-ma=
net" target=3D"_blank">https://datatracker.ietf.org/doc/charter-ietf-manet<=
/a>/</div></div></blockquote><div><br></div><div>yes <br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font=
-size:14px;font-family:Calibri,sans-serif">
<div><br>
</div>
<div>As you can see, there are specific milestones listed at the bottom, wh=
ich are the focused work items the WG has agreed on.=C2=A0 I read the miles=
tones as an indication of priorities =E2=80=94 with the description in the =
charter of what the items are.</div></div></blockquote><div><br></div><div>=
Milestones in my opinion are not priority indications, because in project m=
anagement work-items mostly work in parallel, so milestones do not show pri=
ority, and in the past practice of MANET WG there are many later milestones=
 that were advanced old milestones. I suggest that IETF and IESG change pla=
ns for approvals to add priority especial for groups like MANET WG.<br>=C2=
=A0<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-w=
ord;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif">
<div><br>
</div>
<div>Do you have specific work items that you think belong on the list?=C2=
=A0 Or maybe items that you think don&#39;t belong?=C2=A0 Or is the milesto=
nes indication of priorities not clear enough?</div></div></blockquote><div=
><br></div><div>Yes, we worked MANET unicast manet routing; reactive and pr=
oactive, experimentals and standards but submitted successfully only the pr=
oactive as standard, so we need to work multicast manet routing now. So we =
need multicast reactive and multicast proactive routing, usually multicast =
routing is the most important routing in MANET environment. However, it was=
 a great plan that MANET WG started in the past with unicast and now the ne=
w issue is multicast routing. We need multicast for reactive routing and mu=
lticast for proactive, we got a proposal before for a multicast routing whi=
ch was presented in IETF89 meeting. <br><br></div><div>Therefore, this grou=
p needs to focus on two new routing: 1- Multicast Reactive Routing, 2- Mult=
icast Proactive Routing, in addition we may add 3- Hybrid Routing. The mult=
icast routing is with high priority, because we only have very simple multi=
cast, which MANET needs multicast because most use cases depend on group co=
mmunication. <br><br></div><div>IMHO, our group needs an information draft =
for MANET considerations and use cases. We had separate considerations in R=
FCs and we need to add uses of our past done protocols and looking to the f=
uture work use cases. This draft needs to work in parallel with updating RF=
C2501, which needs update specially that it ignore the new MANET packet and=
 MANET interfaces. For example, in MANET WG the 5148 was just for jitter, a=
nd to solve issues related to a protocol, but we need a full picture of oth=
er considerations, and one place to have all consideration, not many docume=
nts with considerations. However, we need to separate a one item that cover=
s MANET security considerations related to the MANET protocol, and security=
 related to the MANET packet. Therefore, my overall suggestion is that the =
work items with priority are as follows:<br><br></div><div>1- MANET conside=
rations and use cases=C2=A0=C2=A0 (highest priority, p=3D1)<br></div><div>2=
- update of RFC2501=C2=A0=C2=A0=C2=A0=C2=A0 (p=3D2)<br></div><div>3- Multic=
ast Reactive Routing (p=3D3)<br></div><div>4- Multicast Proactive Routing (=
p=3D3)<br></div><div>5- MANET security considerations (p=3D4)<br></div><div=
>6- Maintenance of OLSRv2 (p=3D3)<br><br></div><div>Best Regards<br></div><=
div>AB<br></div><div><br></div><div><br></div><div>AB<br></div><div>=C2=A0<=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;colo=
r:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif"><span class=3D"=
HOEnZb"><font color=3D"#888888"></font></span><span class=3D"HOEnZb"></span=
></div>

</blockquote></div><br></div></div>

--001a114e7a3c7b271a0535b88b06--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Abdussalam Baryun <abdussalambaryun@gmail.com>
Thread-Topic: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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Date: Mon, 20 Jun 2016 19:18:55 +0000
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com> <D38D6519.12F446%aretana@cisco.com> <CADnDZ888bhap3=Z9qL_N02Jshvm2BdDQNuNH1OrFrkMaNiBv_A@mail.gmail.com>
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On 6/20/16, 12:53 PM, "Abdussalam Baryun" <abdussalambaryun@gmail.com<mailt=
o:abdussalambaryun@gmail.com>> wrote:

AB:

Hi!

...


As you can see, there are specific milestones listed at the bottom, which a=
re the focused work items the WG has agreed on.  I read the milestones as a=
n indication of priorities - with the description in the charter of what th=
e items are.

Milestones in my opinion are not priority indications, because in project m=
anagement work-items mostly work in parallel, so milestones do not show pri=
ority, and in the past practice of MANET WG there are many later milestones=
 that were advanced old milestones. I suggest that IETF and IESG change pla=
ns for approvals to add priority especial for groups like MANET WG.

I think that those are great comments for the WG Chairs to keep in mind, af=
ter all, there are the ones responsible for the progress of the WG (rfc2418=
).   Besides using milestones, the WG Chairs can use any other project mana=
gement methodology to keep the WG on track.

On the other hand, I don't think the IEFT/IESG should make special provisio=
ns for any specific WG.  Having said that, the WG Chairs and I will be work=
ing together to make sure the focus of the WG is applied to the agreed upon=
 priorities.


Some of your other suggestions (I left them below for reference) I think ma=
y fit in items that are already in the charter.  The WG may want to discuss=
 others and their priority - but that is something I will leave to the Chai=
rs and the WG to decide.

Thanks!

Alvaro.




Do you have specific work items that you think belong on the list?  Or mayb=
e items that you think don't belong?  Or is the milestones indication of pr=
iorities not clear enough?

Yes, we worked MANET unicast manet routing; reactive and proactive, experim=
entals and standards but submitted successfully only the proactive as stand=
ard, so we need to work multicast manet routing now. So we need multicast r=
eactive and multicast proactive routing, usually multicast routing is the m=
ost important routing in MANET environment. However, it was a great plan th=
at MANET WG started in the past with unicast and now the new issue is multi=
cast routing. We need multicast for reactive routing and multicast for proa=
ctive, we got a proposal before for a multicast routing which was presented=
 in IETF89 meeting.

Therefore, this group needs to focus on two new routing: 1- Multicast React=
ive Routing, 2- Multicast Proactive Routing, in addition we may add 3- Hybr=
id Routing. The multicast routing is with high priority, because we only ha=
ve very simple multicast, which MANET needs multicast because most use case=
s depend on group communication.

IMHO, our group needs an information draft for MANET considerations and use=
 cases. We had separate considerations in RFCs and we need to add uses of o=
ur past done protocols and looking to the future work use cases. This draft=
 needs to work in parallel with updating RFC2501, which needs update specia=
lly that it ignore the new MANET packet and MANET interfaces. For example, =
in MANET WG the 5148 was just for jitter, and to solve issues related to a =
protocol, but we need a full picture of other considerations, and one place=
 to have all consideration, not many documents with considerations. However=
, we need to separate a one item that covers MANET security considerations =
related to the MANET protocol, and security related to the MANET packet. Th=
erefore, my overall suggestion is that the work items with priority are as =
follows:

1- MANET considerations and use cases   (highest priority, p=3D1)
2- update of RFC2501     (p=3D2)
3- Multicast Reactive Routing (p=3D3)
4- Multicast Proactive Routing (p=3D3)
5- MANET security considerations (p=3D4)
6- Maintenance of OLSRv2 (p=3D3)

Best Regards
AB

--_000_D38D994712F61Faretanaciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/20/16, 12:53 PM, &quot;Abdussalam Baryun&quot; &lt;<a href=3D"mai=
lto:abdussalambaryun@gmail.com">abdussalambaryun@gmail.com</a>&gt; wrote:</=
div>
<div><br>
</div>
<div>AB:</div>
<div><br>
</div>
<div>Hi!</div>
<div><br>
</div>
<div>&#8230;</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<div><br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div><br>
</div>
<div>As you can see, there are specific milestones listed at the bottom, wh=
ich are the focused work items the WG has agreed on.&nbsp; I read the miles=
tones as an indication of priorities &#8212; with the description in the ch=
arter of what the items are.</div>
</div>
</blockquote>
<div><br>
</div>
<div>Milestones in my opinion are not priority indications, because in proj=
ect management work-items mostly work in parallel, so milestones do not sho=
w priority, and in the past practice of MANET WG there are many later miles=
tones that were advanced old milestones.
 I suggest that IETF and IESG change plans for approvals to add priority es=
pecial for groups like MANET WG.</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I think that those are great comments for the WG Chairs to keep in min=
d, after all, there are the ones responsible for the progress of the WG (rf=
c2418). &nbsp; Besides using milestones, the WG Chairs can use any other pr=
oject management methodology to keep
 the WG on track.</div>
<div><br>
</div>
<div>On the other hand, I don't think the IEFT/IESG should make special pro=
visions for any specific WG. &nbsp;Having said that, the WG Chairs and I wi=
ll be working together to make sure the focus of the WG is applied to the a=
greed upon priorities.</div>
<div><br>
</div>
<div><br>
</div>
<div>Some of your other suggestions (I left them below for reference) I thi=
nk may fit in items that are already in the charter. &nbsp;The WG may want =
to discuss others and their priority &#8212; but that is something I will l=
eave to the Chairs and the WG to decide.</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<div><br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div><br>
</div>
<div>Do you have specific work items that you think belong on the list?&nbs=
p; Or maybe items that you think don't belong?&nbsp; Or is the milestones i=
ndication of priorities not clear enough?</div>
</div>
</blockquote>
<div><br>
</div>
<div>Yes, we worked MANET unicast manet routing; reactive and proactive, ex=
perimentals and standards but submitted successfully only the proactive as =
standard, so we need to work multicast manet routing now. So we need multic=
ast reactive and multicast proactive
 routing, usually multicast routing is the most important routing in MANET =
environment. However, it was a great plan that MANET WG started in the past=
 with unicast and now the new issue is multicast routing. We need multicast=
 for reactive routing and multicast
 for proactive, we got a proposal before for a multicast routing which was =
presented in IETF89 meeting.
<br>
<br>
</div>
<div>Therefore, this group needs to focus on two new routing: 1- Multicast =
Reactive Routing, 2- Multicast Proactive Routing, in addition we may add 3-=
 Hybrid Routing. The multicast routing is with high priority, because we on=
ly have very simple multicast, which
 MANET needs multicast because most use cases depend on group communication=
. <br>
<br>
</div>
<div>IMHO, our group needs an information draft for MANET considerations an=
d use cases. We had separate considerations in RFCs and we need to add uses=
 of our past done protocols and looking to the future work use cases. This =
draft needs to work in parallel
 with updating RFC2501, which needs update specially that it ignore the new=
 MANET packet and MANET interfaces. For example, in MANET WG the 5148 was j=
ust for jitter, and to solve issues related to a protocol, but we need a fu=
ll picture of other considerations,
 and one place to have all consideration, not many documents with considera=
tions. However, we need to separate a one item that covers MANET security c=
onsiderations related to the MANET protocol, and security related to the MA=
NET packet. Therefore, my overall
 suggestion is that the work items with priority are as follows:<br>
<br>
</div>
<div>1- MANET considerations and use cases&nbsp;&nbsp; (highest priority, p=
=3D1)<br>
</div>
<div>2- update of RFC2501&nbsp;&nbsp;&nbsp;&nbsp; (p=3D2)<br>
</div>
<div>3- Multicast Reactive Routing (p=3D3)<br>
</div>
<div>4- Multicast Proactive Routing (p=3D3)<br>
</div>
<div>5- MANET security considerations (p=3D4)<br>
</div>
<div>6- Maintenance of OLSRv2 (p=3D3)<br>
<br>
</div>
<div>Best Regards<br>
</div>
<div>AB</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

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Hi,

On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <
chris.dearlove@baesystems.com> wrote:

> Comments below.
>
>
>
> Short version, still some points I think can be improved. Down to one
> sticking point, on deciding on how to handle changes to, and cessation of=
,
> the reactive set. (Longer text below.) I think this is a real issue. Take=
 a
> look at what you do in your implementation - now see if someone could wor=
k
> out to do that from the text. I don=E2=80=99t think they can.
>
>
>

we clarified this in the draft. Please check the our detailed reply below.

<snip>

>
> Page 5, second bullet. How does FEC help with packet re-ordering?
>
>
>
> Normally, the packets are coded in different "blocks" and those blocks ar=
e
> transmitted in different paths. The arriving order of those "blocks" is
> less important.
>
>
>
> CMD> I still don=E2=80=99t see how it helps with packet re-ordering.
>

When FEC is applied, the encoder takes one or several packets and produce
several coded blocks (denoted block-1, block-2, ... block-n). Those blocks
are forwarded as IP datagrams in the disjoint paths. Because the encoded
blocks are unordered for FEC, the arriving order of the encoded blocks of
the same packet(s) doesn't really matter.


>
>
> <snip>
>
> Page 6, first paragraph. I still disagree with characterising as low data
> rate links. At most the protocol multiplies capacity by a small factor, n=
ot
> the orders pf magnitude that link capacities span.
>
>
>
> We won't claim that there will be orders of magnitude that link capacitie=
s
> span, but it would be beneficial to have aggregated throughput and load
> balancing.
>
>
>
> So what do you think of:
>
>
>
> MP-OLSRv2 is designed for networks with dynamic topology by avoiding
> single route failure. It can also provide higher aggregated throughput an=
d
> load balancing, which is beneficial for low data rate links.
>
>
>
> CMD> Still not convinced by the phrase low data rate links. The issues ar=
e
> ones of load relative to network capacity, and in particular if there are
> underutilised parts of the network. Plus of course a redundancy issue if
> packets do not all need to arrive. These can all occur in high data rate
> networks as much as low data rate ones.
>
>
>

It makes sense. I'm OK with removing the text related to low data rate
links.

<snip>


> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as =
well (e.g
> Routing Set).
>
>
>
> Actually, the number of the items in the array PT_address[1...n] already
> gives the hop count -- is it necessary to repeat the information with an
> additional field? It is not used anyways.
>
>
>
> CMD> That it=E2=80=99s there could be called out. It gets used in OLSRv2 =
as a
> suggested tie-breaker, and some tools might use it. I thought I=E2=80=99d=
 made a
> comment to say what n is, which I don=E2=80=99t see here. This can combin=
e with that
>

Yes. we added some text on what "n" is.

<snip>

> A major omission is discussion of expiry of new Tuples without expiry
> times. If proactive you can (but don=E2=80=99t) discuss when supporting s=
ets
> change.
>
> If reactive it=E2=80=99s rather a mess (a reason I dislike the reactive
> mechanism). When to discard? When to recreate? If dependent on packet flo=
w
> then that=E2=80=99s another interaction with IP to document - and impleme=
nt.
>
>
>
> The update of the the Multi-path routing set is described in section 8.6.
> The expiry timers are removed since -07 based on the comments received. O=
ne
> of the reasons is to be consistent with the OLSRv2 routing set, in which =
no
> expiry timer is used.
>
> Generally speaking, in proactive mode, it follows the same mechanism as
> OLSRv2: when ever there is a need to update the OLSRv2 routing set, the
> multi-path routing set is updated.
>
> In reactive mode, all the Multi-path routing tuples are removed when the
> "topology graph" is changed.  The new tuples are recreated "on-demand".
>
>
>
> CMD> OK, let=E2=80=99s think about that in the reactive case. (Proactive =
is easy,
> but it needs to be said, which it isn=E2=80=99t.) You want a set, you gen=
erate it
> on demand. There is a change to the Topology Graph. So do you recalculate
> the set?
>

No, at this point, we only clear the entire Multi-path Routing Set.


> If not then you introduce a stutter, as the packets are flowing and the
> set disappears and you need to trigger it again.
>

Yes, it necessary to trigger the calculation again. But the time required
is trivial, because this is only local: no additional message exchange with
other routers is required.


> Which means monitoring for that throughout a flow, not just at its start.
>

We don't actually have the concept "flow" in this extension. For each
datagram, yes, it's necessary to check if a tuple exist or not. There is no
much difference from checking the FIB for IP.


> If you do (recalculate the set when the graph changes) how do you know
> when to stop calculating it? That depends on knowing when the flow stops.
>
And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more than is required -=
 some changes to
> the graph would have no effect (for example the increase in metric of a
> link not being used). But it=E2=80=99s hard to specify.
>

For the moment, we simply take "the topology graph changes", because even
links that not used might matters: for example, the decrease in metric of a
not used metric that introduces a better path.
It's true that it's possible that it's more than required and could be
optimised in the future, but considering it's a reactive approach, I
believe it's acceptable.

On this point (which changes) some sort of permissive wording to indicate
> that you can avoid making changes when you know they don=E2=80=99t matter=
 is
> probably right. The when do you stop calculating question is more importa=
nt
> - and needs text discussing it.
>

>
>
> You could when acting reactively forward by usual means in all cases whil=
e
> waiting.
>
> The actual packet forwarding by round-robin is an IP process, not this
> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proces=
s, why
> mandate exactly how it=E2=80=99s used?
>
>
>
> Choosing which path to put in the source routing header is
> olsrv2-multipath specific, because there are multiple of them. Of course,
> using round-robin is not mandatory -- using other schedulers won't impact
> the compatibility. Actually, we put it as one of the experiment points al=
so:
>
>
>
>
>
>
>
> * Different path-selection schedulers.  By default, Round-Robin
> scheduling is used to select a path to be used for datagrams.  In
> some scenarios, weighted scheduling can be considered: for       example,
> the paths with lower metrics (i.e., higher quality) can       transfer mo=
re
> datagrams compared to paths with higher metrics.*
>
>
>
> CMD> This is missing my point. It=E2=80=99s not the round-robin that matt=
ers, it=E2=80=99s
> that IP needs to do anything. That=E2=80=99s what needs not to be buried.=
 Putting
> together a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section early on, =
perhaps in the
> applicability section, is needed.
>
>
>

We added the following text in the applicability statement:

*MP-OLSRv2 supports two different, but interoperable multi-path calculation
approaches: proactive and reactive. In the proactive calculation, the paths
to all the destinations are calculated before needed. In the reactive
calculation, only the paths to desired destination(s) are calculated on
demand. The proactive approach requires more computational resources than
the reactive one. The reactive approach requires the IP forwarding plan to
trigger the multi-path calculation.*

*MP-OLSRv2 forwards datagrams using the source routing header. As there are
multiple paths to each destination, MP-OLSRv2 requires the IP forwarding
plan to be able to choose which source route to be put in the source
routing header based on the path scheduler defined by MP-OLSRv2. For IPv4
networks, implementation of loose source routing is required following
[RFC0791]. For IPv6 networks, implementation of strict source routing is
required following [RFC6554].*

As usual, an updated draft is attached, in case needed.

regards

Jiazi

--001a1140d2beba710f0535bd685a
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,=C2=A0<br><div class=3D"gmail_extra"><br><div class=3D"=
gmail_quote">On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=
=3D"_blank">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-wid=
th:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-l=
eft:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Comments below.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Short version, still some points I think can=
 be improved. Down to one sticking point, on deciding on how to handle chan=
ges to, and cessation of, the reactive
 set. (Longer text below.) I think this is a real issue. Take a look at wha=
t you do in your implementation - now see if someone could work out to do t=
hat from the text. I don=E2=80=99t think they can.<u></u><u></u></span></p>=
<span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0</span></p></span></div></div><=
/blockquote><div><br></div><div>we clarified this in the draft. Please chec=
k the our detailed reply below.=C2=A0</div><div><br></div><div>&lt;snip&gt;=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-s=
tyle:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"pur=
ple"><div><div><div><div><div><span class=3D""><div>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><br>
Page 5, second bullet. How does FEC help with packet re-ordering?<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">Normally, the packets are coded in different &quot;b=
locks&quot; and those blocks are transmitted in different paths. The arrivi=
ng order of those &quot;blocks&quot; is less important.=C2=A0<u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; I still don=E2=80=99t see how=
 it helps with packet re-ordering.</span></p></div></div></div></div></div>=
</div></div></blockquote><div><br></div><div>When FEC is applied, the encod=
er takes one or several packets and produce several coded blocks (denoted b=
lock-1, block-2, ... block-n). Those blocks are forwarded as IP datagrams i=
n the disjoint paths. Because the encoded blocks are unordered for FEC, the=
 arriving order of the encoded blocks of the same packet(s) doesn&#39;t rea=
lly matter.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rg=
b(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB=
" link=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"=
MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;col=
or:rgb(31,73,125)"><u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal">Page 6, first paragraph. I still disagree with chara=
cterising as low data rate links. At most the protocol multiplies capacity =
by a small factor, not the orders pf magnitude that link capacities span.<u=
></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We won&#39;t claim that there will be orders of magn=
itude that link capacities span, but it would be beneficial to have aggrega=
ted throughput and load balancing.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">So what do you think of:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">MP-OLSRv2 is designed for networks with dynamic topo=
logy by avoiding single route failure. It can also provide higher aggregate=
d throughput and load balancing, which is beneficial for low data rate link=
s. =C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; Still not convinced by the ph=
rase low data rate links. The issues are ones of load relative to network c=
apacity, and in particular if there are underutilised
 parts of the network. Plus of course a redundancy issue if packets do not =
all need to arrive. These can all occur in high data rate networks as much =
as low data rate ones.<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">=C2=A0</p></div></span></div></div></div></div></div=
></div></blockquote><div><br></div><div>It makes sense. I&#39;m OK with rem=
oving the text related to low data rate links.=C2=A0</div><div><br></div><d=
iv>&lt;snip&gt;</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(=
204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" =
link=3D"blue" vlink=3D"purple"><div><div><div><div><div><span class=3D""><b=
lockquote style=3D"border-style:none none none solid;border-left-color:rgb(=
204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm"><p class=3D"MsoNormal">PT_=E2=80=A6 What about hop coun=
t? Elsewhere in OLSRv2 we record that as well (e.g Routing Set).<u></u><u><=
/u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">Actually, the number of the items in the array PT_ad=
dress[1...n] already gives the hop count -- is it necessary to repeat the i=
nformation with an additional field? It is not used anyways.=C2=A0<u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; That it=E2=80=99s there could=
 be called out. It gets used in OLSRv2 as a suggested tie-breaker, and some=
 tools might use it. I thought I=E2=80=99d made a comment to say
 what n is, which I don=E2=80=99t see here. This can combine with that</spa=
n></p></div></div></div></div></div></div></div></blockquote><div><br></div=
><div>Yes. we added some text on what &quot;n&quot; is.=C2=A0</div><div>=C2=
=A0</div><div>&lt;snip&gt;</div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,20=
4,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=
=3D"blue" vlink=3D"purple"><div><div><div><div><div><span class=3D""><block=
quote style=3D"border-style:none none none solid;border-left-color:rgb(204,=
204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;ma=
rgin-right:0cm"><p class=3D"MsoNormal">
A major omission is discussion of expiry of new Tuples without expiry times=
. If proactive you can (but don=E2=80=99t) discuss when supporting sets cha=
nge.=C2=A0<u></u><u></u></p>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal">If reactive it=E2=80=99s rather a mess (a reason I d=
islike the reactive mechanism). When to discard? When to recreate? If depen=
dent on packet flow then that=E2=80=99s another interaction with IP to docu=
ment - and implement.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The update of the the Multi-path routing set is desc=
ribed in section 8.6. The expiry timers are removed since -07 based on the =
comments received. One of the reasons is to be consistent with the OLSRv2 r=
outing set, in which no expiry timer
 is used.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Generally speaking, in proactive mode, it follows th=
e same mechanism as OLSRv2: when ever there is a need to update the OLSRv2 =
routing set, the multi-path routing set is updated.=C2=A0<u></u><u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">In reactive mode, all the Multi-path routing tuples =
are removed when the &quot;topology graph&quot; is changed.=C2=A0 The new t=
uples are recreated &quot;on-demand&quot;.=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; OK, let=E2=80=99s think about=
 that in the reactive case. (Proactive is easy, but it needs to be said, wh=
ich it isn=E2=80=99t.) You want a set, you generate it on demand.
 There is a change to the Topology Graph. So do you recalculate the set? </=
span></p></div></div></div></div></div></div></div></blockquote><div><br></=
div><div>No, at this point, we only clear the entire Multi-path Routing Set=
.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,=
204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"=
blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"=
><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,=
73,125)">If not then you introduce a stutter, as the packets are flowing an=
d the set disappears and you need to trigger it again. </span></p></div></d=
iv></div></div></div></div></div></blockquote><div><br></div><div>Yes, it n=
ecessary to trigger the calculation again. But the time required is trivial=
, because this is only local: no additional message exchange with other rou=
ters is required.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-co=
lor:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D=
"EN-GB" link=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-ser=
if;color:rgb(31,73,125)">Which means monitoring for that throughout a flow,=
 not just at
 its start. </span></p></div></div></div></div></div></div></div></blockquo=
te><div><br></div><div>We don&#39;t actually have the concept &quot;flow&qu=
ot; in this extension. For each datagram, yes, it&#39;s necessary to check =
if a tuple exist or not. There is no much difference from checking the FIB =
for IP.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(20=
4,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" li=
nk=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:r=
gb(31,73,125)">If you do (recalculate the set when the graph changes) how d=
o you know when to stop calculating it? That depends on knowing when the fl=
ow stops.</span>=C2=A0</p></div></div></div></div></div></div></div></block=
quote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:s=
olid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><=
div><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> And =E2=80=9Ct=
he Topology Graph changes=E2=80=9D is more than is required - some changes =
to the graph would have no
 effect (for example the increase in metric of a link not being used). But =
it=E2=80=99s hard to specify. </span></p></div></div></div></div></div></di=
v></div></blockquote><div><br></div><div>For the moment, we simply take &qu=
ot;the topology graph changes&quot;, because even links that not used might=
 matters: for example, the decrease in metric of a not used metric that int=
roduces a better path. =C2=A0</div><div>It&#39;s true that it&#39;s possibl=
e that it&#39;s more than required and could be optimised in the future, bu=
t considering it&#39;s a reactive approach, I believe it&#39;s acceptable.=
=C2=A0</div><div><br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204=
);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"><s=
pan style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,=
125)">On this point (which changes) some sort of permissive wording to indi=
cate that you can avoid making changes when you know they don=E2=80=99t mat=
ter is probably right. The
 when do you stop calculating question is more important - and needs text d=
iscussing it.</span>=C2=A0</p></div></div></div></div></div></div></div></b=
lockquote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-sty=
le:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purpl=
e"><div><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font=
-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u><=
/u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Choosing which path to put in the source routing hea=
der is olsrv2-multipath specific, because there are multiple of them. Of co=
urse, using round-robin is not mandatory -- using other schedulers won&#39;=
t impact the compatibility. Actually,
 we put it as one of the experiment points also:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><i>=C2=A0Different path-selection schedulers.=C2=A0 =
By default, Round-Robin<br>
=C2=A0 =C2=A0 =C2=A0 scheduling is used to select a path to be used for dat=
agrams.=C2=A0 In<br>
=C2=A0 =C2=A0 =C2=A0 some scenarios, weighted scheduling can be considered:=
 for<br>
=C2=A0 =C2=A0 =C2=A0 example, the paths with lower metrics (i.e., higher qu=
ality) can<br>
=C2=A0 =C2=A0 =C2=A0 transfer more datagrams compared to paths with higher =
metrics.</i><u></u><u></u></p>
</blockquote>
</div>
</span><div>
<p class=3D"MsoNormal">=C2=A0<span style=3D"color:rgb(31,73,125)"><u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; This is missing my point. It=E2=80=
=99s not the round-robin that matters, it=E2=80=99s that IP needs to do any=
thing. That=E2=80=99s what needs not to be buried. Putting together
 a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section early on, perhaps in=
 the applicability section, is needed.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0</span></p></div></div></div></=
div></div></div></div></blockquote><div><br></div><div>We added the followi=
ng text in the applicability statement:</div><div><br></div><div><div><i>MP=
-OLSRv2 supports two different, but interoperable multi-path calculation ap=
proaches: proactive and reactive. In the proactive calculation, the paths t=
o all the destinations are calculated before needed. In the reactive calcul=
ation, only the paths to desired destination(s) are calculated on demand. T=
he proactive approach requires more computational resources than the reacti=
ve one. The reactive approach requires the IP forwarding plan to trigger th=
e multi-path calculation.</i></div><div><i><br></i></div><div><i>MP-OLSRv2 =
forwards datagrams using the source routing header. As there are multiple p=
aths to each destination, MP-OLSRv2 requires the IP forwarding plan to be a=
ble to choose which source route to be put in the source routing header bas=
ed on the path scheduler defined by MP-OLSRv2. For IPv4 networks, implement=
ation of loose source routing is required following [RFC0791]. For IPv6 net=
works, implementation of strict source routing is required following [RFC65=
54].</i></div></div><div><br></div><div>As usual, an updated draft is attac=
hed, in case needed.=C2=A0</div><div><br></div><div>regards</div><div><br><=
/div><div>Jiazi</div><div><br></div><div><br></div><div>=C2=A0</div></div><=
/div></div>

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--001a1140d2beba71150535bd685c--


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From: Christopher Dearlove <christopher.dearlove@gmail.com>
Date: Tue, 21 Jun 2016 00:02:12 +0100
To: Jiazi YI <ietf@jiaziyi.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/yDgJ9s5E4lUaraYsJ1RPEgXEPRI>
Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, Christopher Dearlove <christopher.dearlove@gmail.com>, MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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"Because the encoded blocks are unordered for FEC" is, at best, only applica=
ble to some FEC methods, it's definitely not universal.

-- =20
Christopher Dearlove

> On 20 Jun 2016, at 23:41, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
> Hi,=20
>=20
>> On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <chris.dearlo=
ve@baesystems.com> wrote:
>> Comments below.
>>=20
>> =20
>>=20
>> Short version, still some points I think can be improved. Down to one sti=
cking point, on deciding on how to handle changes to, and cessation of, the r=
eactive set. (Longer text below.) I think this is a real issue. Take a look a=
t what you do in your implementation - now see if someone could work out to d=
o that from the text. I don=E2=80=99t think they can.
>>=20
>=20
> we clarified this in the draft. Please check the our detailed reply below.=
=20
>=20
> <snip>=20
>>=20
>> Page 5, second bullet. How does FEC help with packet re-ordering?
>>=20
>> =20
>>=20
>> Normally, the packets are coded in different "blocks" and those blocks ar=
e transmitted in different paths. The arriving order of those "blocks" is le=
ss important.=20
>>=20
>> =20
>>=20
>> CMD> I still don=E2=80=99t see how it helps with packet re-ordering.
>>=20
>=20
> When FEC is applied, the encoder takes one or several packets and produce s=
everal coded blocks (denoted block-1, block-2, ... block-n). Those blocks ar=
e forwarded as IP datagrams in the disjoint paths. Because the encoded block=
s are unordered for FEC, the arriving order of the encoded blocks of the sam=
e packet(s) doesn't really matter.=20
> =20
>> =20
>>=20
>> <snip>
>>=20
>> Page 6, first paragraph. I still disagree with characterising as low data=
 rate links. At most the protocol multiplies capacity by a small factor, not=
 the orders pf magnitude that link capacities span.
>>=20
>> =20
>>=20
>> We won't claim that there will be orders of magnitude that link capacitie=
s span, but it would be beneficial to have aggregated throughput and load ba=
lancing.=20
>>=20
>> =20
>>=20
>> So what do you think of:
>>=20
>> =20
>>=20
>> MP-OLSRv2 is designed for networks with dynamic topology by avoiding sing=
le route failure. It can also provide higher aggregated throughput and load b=
alancing, which is beneficial for low data rate links. =20
>>=20
>> =20
>>=20
>> CMD> Still not convinced by the phrase low data rate links. The issues ar=
e ones of load relative to network capacity, and in particular if there are u=
nderutilised parts of the network. Plus of course a redundancy issue if pack=
ets do not all need to arrive. These can all occur in high data rate network=
s as much as low data rate ones.
>>=20
>=20
> It makes sense. I'm OK with removing the text related to low data rate lin=
ks.=20
>=20
> <snip>
> =20
>> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as w=
ell (e.g Routing Set).
>>=20
>> =20
>>=20
>> Actually, the number of the items in the array PT_address[1...n] already g=
ives the hop count -- is it necessary to repeat the information with an addi=
tional field? It is not used anyways.=20
>>=20
>> =20
>>=20
>> CMD> That it=E2=80=99s there could be called out. It gets used in OLSRv2 a=
s a suggested tie-breaker, and some tools might use it. I thought I=E2=80=99=
d made a comment to say what n is, which I don=E2=80=99t see here. This can c=
ombine with that
>>=20
>=20
> Yes. we added some text on what "n" is.=20
> =20
> <snip>
>> A major omission is discussion of expiry of new Tuples without expiry tim=
es. If proactive you can (but don=E2=80=99t) discuss when supporting sets ch=
ange.=20
>>=20
>> If reactive it=E2=80=99s rather a mess (a reason I dislike the reactive m=
echanism). When to discard? When to recreate? If dependent on packet flow th=
en that=E2=80=99s another interaction with IP to document - and implement.
>>=20
>> =20
>>=20
>> The update of the the Multi-path routing set is described in section 8.6.=
 The expiry timers are removed since -07 based on the comments received. One=
 of the reasons is to be consistent with the OLSRv2 routing set, in which no=
 expiry timer  is used.=20
>>=20
>> Generally speaking, in proactive mode, it follows the same mechanism as O=
LSRv2: when ever there is a need to update the OLSRv2 routing set, the multi=
-path routing set is updated.=20
>>=20
>> In reactive mode, all the Multi-path routing tuples are removed when the "=
topology graph" is changed.  The new tuples are recreated "on-demand".=20
>>=20
>> =20
>>=20
>> CMD> OK, let=E2=80=99s think about that in the reactive case. (Proactive i=
s easy, but it needs to be said, which it isn=E2=80=99t.) You want a set, yo=
u generate it on demand. There is a change to the Topology Graph. So do you r=
ecalculate the set?
>>=20
>=20
> No, at this point, we only clear the entire Multi-path Routing Set.=20
> =20
>> If not then you introduce a stutter, as the packets are flowing and the s=
et disappears and you need to trigger it again.
>>=20
>=20
> Yes, it necessary to trigger the calculation again. But the time required i=
s trivial, because this is only local: no additional message exchange with o=
ther routers is required.=20
> =20
>> Which means monitoring for that throughout a flow, not just at its start.=

>>=20
>=20
> We don't actually have the concept "flow" in this extension. For each data=
gram, yes, it's necessary to check if a tuple exist or not. There is no much=
 difference from checking the FIB for IP.=20
> =20
>> If you do (recalculate the set when the graph changes) how do you know wh=
en to stop calculating it? That depends on knowing when the flow stops.=20
>>=20
>> And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more than is required=
 - some changes to the graph would have no effect (for example the increase i=
n metric of a link not being used). But it=E2=80=99s hard to specify.
>>=20
>=20
> For the moment, we simply take "the topology graph changes", because even l=
inks that not used might matters: for example, the decrease in metric of a n=
ot used metric that introduces a better path. =20
> It's true that it's possible that it's more than required and could be opt=
imised in the future, but considering it's a reactive approach, I believe it=
's acceptable.=20
>=20
>> On this point (which changes) some sort of permissive wording to indicate=
 that you can avoid making changes when you know they don=E2=80=99t matter i=
s probably right. The when do you stop calculating question is more importan=
t - and needs text discussing it.=20
>>=20
>> =20
>>=20
>>=20
>> You could when acting reactively forward by usual means in all cases whil=
e waiting.
>>=20
>> The actual packet forwarding by round-robin is an IP process, not this pr=
otocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, wh=
y mandate exactly how it=E2=80=99s used?
>>=20
>> =20
>>=20
>> Choosing which path to put in the source routing header is olsrv2-multipa=
th specific, because there are multiple of them. Of course, using round-robi=
n is not mandatory -- using other schedulers won't impact the compatibility.=
 Actually, we put it as one of the experiment points also:
>>=20
>> =20
>>=20
>>  Different path-selection schedulers.  By default, Round-Robin
>>       scheduling is used to select a path to be used for datagrams.  In
>>       some scenarios, weighted scheduling can be considered: for
>>       example, the paths with lower metrics (i.e., higher quality) can
>>       transfer more datagrams compared to paths with higher metrics.
>>=20
>> =20
>>=20
>> CMD> This is missing my point. It=E2=80=99s not the round-robin that matt=
ers, it=E2=80=99s that IP needs to do anything. That=E2=80=99s what needs no=
t to be buried. Putting together a clear =E2=80=9Cwhat IP needs to do=E2=80=9D=
 section early on, perhaps in the applicability section, is needed.
>>=20
>=20
> We added the following text in the applicability statement:
>=20
> MP-OLSRv2 supports two different, but interoperable multi-path calculation=
 approaches: proactive and reactive. In the proactive calculation, the paths=
 to all the destinations are calculated before needed. In the reactive calcu=
lation, only the paths to desired destination(s) are calculated on demand. T=
he proactive approach requires more computational resources than the reactiv=
e one. The reactive approach requires the IP forwarding plan to trigger the m=
ulti-path calculation.
>=20
> MP-OLSRv2 forwards datagrams using the source routing header. As there are=
 multiple paths to each destination, MP-OLSRv2 requires the IP forwarding pl=
an to be able to choose which source route to be put in the source routing h=
eader based on the path scheduler defined by MP-OLSRv2. For IPv4 networks, i=
mplementation of loose source routing is required following [RFC0791]. For I=
Pv6 networks, implementation of strict source routing is required following [=
RFC6554].
>=20
> As usual, an updated draft is attached, in case needed.=20
>=20
> regards
>=20
> Jiazi
>=20
>=20
> =20
> <draft-ietf-manet-olsrv2-multipath.txt>

--Apple-Mail-41545777-D556-443D-A7B6-1D31DD5545DD
Content-Type: text/html;
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Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>"Because the encoded blocks are unorde=
red for FEC" is, at best, only applicable to some FEC methods, it's definite=
ly not universal.<br><br>-- &nbsp;<div>Christopher Dearlove</div></div><div>=
<br>On 20 Jun 2016, at 23:41, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.co=
m">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><d=
iv><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8">=
<div dir=3D"ltr">Hi,&nbsp;<br><div class=3D"gmail_extra"><br><div class=3D"g=
mail_quote">On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <spa=
n dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D=
"_blank">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px=
;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex=
">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)">Comments below.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)">Short version, still some points I think can b=
e improved. Down to one sticking point, on deciding on how to handle changes=
 to, and cessation of, the reactive
 set. (Longer text below.) I think this is a real issue. Take a look at what=
 you do in your implementation - now see if someone could work out to do tha=
t from the text. I don=E2=80=99t think they can.<u></u><u></u></span></p><sp=
an class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;</span></p></span></div></div></b=
lockquote><div><br></div><div>we clarified this in the draft. Please check t=
he our detailed reply below.&nbsp;</div><div><br></div><div>&lt;snip&gt;&nbs=
p;</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:s=
olid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><d=
iv><div><div><div><div><span class=3D""><div>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rgb=
(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm">
<p class=3D"MsoNormal"><br>
Page 5, second bullet. How does FEC help with packet re-ordering?<u></u><u><=
/u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">Normally, the packets are coded in different "blocks"=
 and those blocks are transmitted in different paths. The arriving order of t=
hose "blocks" is less important.&nbsp;<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif;color:rgb(31,73,125)">CMD&gt; I still don=E2=80=99t see how i=
t helps with packet re-ordering.</span></p></div></div></div></div></div></d=
iv></div></blockquote><div><br></div><div>When FEC is applied, the encoder t=
akes one or several packets and produce several coded blocks (denoted block-=
1, block-2, ... block-n). Those blocks are forwarded as IP datagrams in the d=
isjoint paths. Because the encoded blocks are unordered for FEC, the arrivin=
g order of the encoded blocks of the same packet(s) doesn't really matter.&n=
bsp;</div><div>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);=
border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" v=
link=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">=
<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rgb=
(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm">
<p class=3D"MsoNormal">Page 6, first paragraph. I still disagree with charac=
terising as low data rate links. At most the protocol multiplies capacity by=
 a small factor, not the orders pf magnitude that link capacities span.<u></=
u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We won't claim that there will be orders of magnitude=
 that link capacities span, but it would be beneficial to have aggregated th=
roughput and load balancing.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">So what do you think of:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">MP-OLSRv2 is designed for networks with dynamic topol=
ogy by avoiding single route failure. It can also provide higher aggregated t=
hroughput and load balancing, which is beneficial for low data rate links. &=
nbsp;<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif;color:rgb(31,73,125)">CMD&gt; Still not convinced by the phra=
se low data rate links. The issues are ones of load relative to network capa=
city, and in particular if there are underutilised
 parts of the network. Plus of course a redundancy issue if packets do not a=
ll need to arrive. These can all occur in high data rate networks as much as=
 low data rate ones.<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">&nbsp;</p></div></span></div></div></div></div></div>=
</div></blockquote><div><br></div><div>It makes sense. I'm OK with removing t=
he text related to low data rate links.&nbsp;</div><div><br></div><div>&lt;s=
nip&gt;</div><div>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,20=
4);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><div><div><div><div><span class=3D""><blockquote st=
yle=3D"border-style:none none none solid;border-left-color:rgb(204,204,204);=
border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right=
:0cm"><p class=3D"MsoNormal">PT_=E2=80=A6 What about hop count? Elsewhere in=
 OLSRv2 we record that as well (e.g Routing Set).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">Actually, the number of the items in the array PT_add=
ress[1...n] already gives the hop count -- is it necessary to repeat the inf=
ormation with an additional field? It is not used anyways.&nbsp;<u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif;color:rgb(31,73,125)">CMD&gt; That it=E2=80=99s there could b=
e called out. It gets used in OLSRv2 as a suggested tie-breaker, and some to=
ols might use it. I thought I=E2=80=99d made a comment to say
 what n is, which I don=E2=80=99t see here. This can combine with that</span=
></p></div></div></div></div></div></div></div></blockquote><div><br></div><=
div>Yes. we added some text on what "n" is.&nbsp;</div><div>&nbsp;</div><div=
>&lt;snip&gt;</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px=
 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-l=
eft-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D=
"purple"><div><div><div><div><div><span class=3D""><blockquote style=3D"bord=
er-style:none none none solid;border-left-color:rgb(204,204,204);border-left=
-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:0cm"><p cl=
ass=3D"MsoNormal">
A major omission is discussion of expiry of new Tuples without expiry times.=
 If proactive you can (but don=E2=80=99t) discuss when supporting sets chang=
e.&nbsp;<u></u><u></u></p>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rgb=
(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm">
<p class=3D"MsoNormal">If reactive it=E2=80=99s rather a mess (a reason I di=
slike the reactive mechanism). When to discard? When to recreate? If depende=
nt on packet flow then that=E2=80=99s another interaction with IP to documen=
t - and implement.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The update of the the Multi-path routing set is descr=
ibed in section 8.6. The expiry timers are removed since -07 based on the co=
mments received. One of the reasons is to be consistent with the OLSRv2 rout=
ing set, in which no expiry timer
 is used.&nbsp;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Generally speaking, in proactive mode, it follows the=
 same mechanism as OLSRv2: when ever there is a need to update the OLSRv2 ro=
uting set, the multi-path routing set is updated.&nbsp;<u></u><u></u></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal">In reactive mode, all the Multi-path routing tuples a=
re removed when the "topology graph" is changed.&nbsp; The new tuples are re=
created "on-demand".&nbsp;<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif;color:rgb(31,73,125)">CMD&gt; OK, let=E2=80=99s think about t=
hat in the reactive case. (Proactive is easy, but it needs to be said, which=
 it isn=E2=80=99t.) You want a set, you generate it on demand.
 There is a change to the Topology Graph. So do you recalculate the set? </s=
pan></p></div></div></div></div></div></div></div></blockquote><div><br></di=
v><div>No, at this point, we only clear the entire Multi-path Routing Set.&n=
bsp;</div><div>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);=
border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" v=
link=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">=
If not then you introduce a stutter, as the packets are flowing and the set d=
isappears and you need to trigger it again. </span></p></div></div></div></d=
iv></div></div></div></blockquote><div><br></div><div>Yes, it necessary to t=
rigger the calculation again. But the time required is trivial, because this=
 is only local: no additional message exchange with other routers is require=
d.&nbsp;</div><div>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,2=
04);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"bl=
ue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"><s=
pan style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,1=
25)">Which means monitoring for that throughout a flow, not just at
 its start. </span></p></div></div></div></div></div></div></div></blockquot=
e><div><br></div><div>We don't actually have the concept "flow" in this exte=
nsion. For each datagram, yes, it's necessary to check if a tuple exist or n=
ot. There is no much difference from checking the FIB for IP.&nbsp;</div><di=
v>&nbsp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-st=
yle:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purpl=
e"><div><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font-=
size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">If you do (re=
calculate the set when the graph changes) how do you know when to stop calcu=
lating it? That depends on knowing when the flow stops.</span>&nbsp;</p></di=
v></div></div></div></div></div></div></blockquote><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left=
-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D=
"EN-GB" link=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p clas=
s=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif=
;color:rgb(31,73,125)"> And =E2=80=9Cthe Topology Graph changes=E2=80=9D is m=
ore than is required - some changes to the graph would have no
 effect (for example the increase in metric of a link not being used). But i=
t=E2=80=99s hard to specify. </span></p></div></div></div></div></div></div>=
</div></blockquote><div><br></div><div>For the moment, we simply take "the t=
opology graph changes", because even links that not used might matters: for e=
xample, the decrease in metric of a not used metric that introduces a better=
 path. &nbsp;</div><div>It's true that it's possible that it's more than req=
uired and could be optimised in the future, but considering it's a reactive a=
pproach, I believe it's acceptable.&nbsp;</div><div><br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;=
border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"=
><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><div><div><div><div><div=
><div><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calib=
ri,sans-serif;color:rgb(31,73,125)">On this point (which changes) some sort o=
f permissive wording to indicate that you can avoid making changes when you k=
now they don=E2=80=99t matter is probably right. The
 when do you stop calculating question is more important - and needs text di=
scussing it.</span>&nbsp;</p></div></div></div></div></div></div></div></blo=
ckquote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:s=
olid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><d=
iv><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font-size:=
11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u></u></sp=
an></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">&nbsp;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rgb=
(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm">
<p class=3D"MsoNormal"><br>
You could when acting reactively forward by usual means in all cases while w=
aiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this proto=
col. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why m=
andate exactly how it=E2=80=99s used?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Choosing which path to put in the source routing head=
er is olsrv2-multipath specific, because there are multiple of them. Of cour=
se, using round-robin is not mandatory -- using other schedulers won't impac=
t the compatibility. Actually,
 we put it as one of the experiment points also:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p>
</div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rgb=
(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8p=
t;margin-right:0cm">
<p class=3D"MsoNormal"><i>&nbsp;Different path-selection schedulers.&nbsp; B=
y default, Round-Robin<br>
&nbsp; &nbsp; &nbsp; scheduling is used to select a path to be used for data=
grams.&nbsp; In<br>
&nbsp; &nbsp; &nbsp; some scenarios, weighted scheduling can be considered: f=
or<br>
&nbsp; &nbsp; &nbsp; example, the paths with lower metrics (i.e., higher qua=
lity) can<br>
&nbsp; &nbsp; &nbsp; transfer more datagrams compared to paths with higher m=
etrics.</i><u></u><u></u></p>
</blockquote>
</div>
</span><div>
<p class=3D"MsoNormal">&nbsp;<span style=3D"color:rgb(31,73,125)"><u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)">CMD&gt; This is missing my point. It=E2=80=99s=
 not the round-robin that matters, it=E2=80=99s that IP needs to do anything=
. That=E2=80=99s what needs not to be buried. Putting together
 a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section early on, perhaps in t=
he applicability section, is needed.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,san=
s-serif;color:rgb(31,73,125)"><u></u>&nbsp;</span></p></div></div></div></di=
v></div></div></div></blockquote><div><br></div><div>We added the following t=
ext in the applicability statement:</div><div><br></div><div><div><i>MP-OLSR=
v2 supports two different, but interoperable multi-path calculation approach=
es: proactive and reactive. In the proactive calculation, the paths to all t=
he destinations are calculated before needed. In the reactive calculation, o=
nly the paths to desired destination(s) are calculated on demand. The proact=
ive approach requires more computational resources than the reactive one. Th=
e reactive approach requires the IP forwarding plan to trigger the multi-pat=
h calculation.</i></div><div><i><br></i></div><div><i>MP-OLSRv2 forwards dat=
agrams using the source routing header. As there are multiple paths to each d=
estination, MP-OLSRv2 requires the IP forwarding plan to be able to choose w=
hich source route to be put in the source routing header based on the path s=
cheduler defined by MP-OLSRv2. For IPv4 networks, implementation of loose so=
urce routing is required following [RFC0791]. For IPv6 networks, implementat=
ion of strict source routing is required following [RFC6554].</i></div></div=
><div><br></div><div>As usual, an updated draft is attached, in case needed.=
&nbsp;</div><div><br></div><div>regards</div><div><br></div><div>Jiazi</div>=
<div><br></div><div><br></div><div>&nbsp;</div></div></div></div>
</div></blockquote><blockquote type=3D"cite"><div>&lt;draft-ietf-manet-olsrv=
2-multipath.txt&gt;</div></blockquote></body></html>=

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--_000_B31EEDDDB8ED7E4A93FDF12A4EECD30D923D13BAGLKXM0002VGREEN_--


From nobody Tue Jun 21 03:26:59 2016
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From: =?UTF-8?Q?Beno=c3=aet_Parrein?= <benoit.parrein@polytech.univ-nantes.fr>
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Date: Tue, 21 Jun 2016 12:26:46 +0200
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Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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This is a multi-part message in MIME format.
--------------040908070500020607050502
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we talk about packet erasure coding there with an identifier of received 
packets. the bytes arrive in order and correctly (if they arrive). a 
reformulation about this point will be done.

cheers
bparrein


Le 21/06/2016 10:39, Dearlove, Christopher (UK) a écrit :
>
> Reed Solomon itself needs the bytes in order. Possibly a packaging of 
> it may be able to cope.
>
> *-- *
>
> *Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> **__________________________________________________________________________
> *
> *T*:  +44 (0)1245 242194  | *E: *chris.dearlove@baesystems.com 
> <mailto:chris.dearlove@baesystems.com>
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great 
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai <http://www.baesystems.com/ai>
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
> *From:*Benoit Parrein [mailto:benoit.parrein@univ-nantes.fr]
> *Sent:* 21 June 2016 08:14
> *To:* Christopher Dearlove
> *Cc:* Jiazi YI; Dearlove, Christopher (UK); MANET IETF
> *Subject:* Re: [manet] draft-ietf-olsrv2-multipath-09
>
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> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documents/Dealing%20With%20Suspicious%20Emails.pdf>.//
>
> hi christopher
>
> you are right. a reformulation seems to be necessary.
>
> but most of fec methods (reed solomon, ldpc, mojette...) can decode in 
> any order of reception (hopefully)
>
> thanks for your comment
>
> bparrein
>
>
> Le 21 juin 2016 à 01:02, Christopher Dearlove 
> <christopher.dearlove@gmail.com 
> <mailto:christopher.dearlove@gmail.com>> a écrit :
>
>     "Because the encoded blocks are unordered for FEC" is, at best,
>     only applicable to some FEC methods, it's definitely not universal.
>
>     -- 
>
>     Christopher Dearlove
>
>
>     On 20 Jun 2016, at 23:41, Jiazi YI <ietf@jiaziyi.com
>     <mailto:ietf@jiaziyi.com>> wrote:
>
>         Hi,
>
>         On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK)
>         <chris.dearlove@baesystems.com
>         <mailto:chris.dearlove@baesystems.com>> wrote:
>
>         Comments below.
>
>         Short version, still some points I think can be improved. Down
>         to one sticking point, on deciding on how to handle changes
>         to, and cessation of, the reactive set. (Longer text below.) I
>         think this is a real issue. Take a look at what you do in your
>         implementation - now see if someone could work out to do that
>         from the text. I don’t think they can.
>
>         we clarified this in the draft. Please check the our detailed
>         reply below.
>
>         <snip>
>
>
>                 Page 5, second bullet. How does FEC help with packet
>                 re-ordering?
>
>             Normally, the packets are coded in different "blocks" and
>             those blocks are transmitted in different paths. The
>             arriving order of those "blocks" is less important.
>
>             CMD> I still don’t see how it helps with packet re-ordering.
>
>         When FEC is applied, the encoder takes one or several packets
>         and produce several coded blocks (denoted block-1, block-2,
>         ... block-n). Those blocks are forwarded as IP datagrams in
>         the disjoint paths. Because the encoded blocks are unordered
>         for FEC, the arriving order of the encoded blocks of the same
>         packet(s) doesn't really matter.
>
>             <snip>
>
>                 Page 6, first paragraph. I still disagree with
>                 characterising as low data rate links. At most the
>                 protocol multiplies capacity by a small factor, not
>                 the orders pf magnitude that link capacities span.
>
>             We won't claim that there will be orders of magnitude that
>             link capacities span, but it would be beneficial to have
>             aggregated throughput and load balancing.
>
>             So what do you think of:
>
>             MP-OLSRv2 is designed for networks with dynamic topology
>             by avoiding single route failure. It can also provide
>             higher aggregated throughput and load balancing, which is
>             beneficial for low data rate links.
>
>             CMD> Still not convinced by the phrase low data rate
>             links. The issues are ones of load relative to network
>             capacity, and in particular if there are underutilised
>             parts of the network. Plus of course a redundancy issue if
>             packets do not all need to arrive. These can all occur in
>             high data rate networks as much as low data rate ones.
>
>         It makes sense. I'm OK with removing the text related to low
>         data rate links.
>
>         <snip>
>
>                 PT_… What about hop count? Elsewhere in OLSRv2 we
>                 record that as well (e.g Routing Set).
>
>             Actually, the number of the items in the array
>             PT_address[1...n] already gives the hop count -- is it
>             necessary to repeat the information with an additional
>             field? It is not used anyways.
>
>             CMD> That it’s there could be called out. It gets used in
>             OLSRv2 as a suggested tie-breaker, and some tools might
>             use it. I thought I’d made a comment to say what n is,
>             which I don’t see here. This can combine with that
>
>         Yes. we added some text on what "n" is.
>
>         <snip>
>
>                 A major omission is discussion of expiry of new Tuples
>                 without expiry times. If proactive you can (but don’t)
>                 discuss when supporting sets change.
>
>                 If reactive it’s rather a mess (a reason I dislike the
>                 reactive mechanism). When to discard? When to
>                 recreate? If dependent on packet flow then that’s
>                 another interaction with IP to document - and implement.
>
>             The update of the the Multi-path routing set is described
>             in section 8.6. The expiry timers are removed since -07
>             based on the comments received. One of the reasons is to
>             be consistent with the OLSRv2 routing set, in which no
>             expiry timer is used.
>
>             Generally speaking, in proactive mode, it follows the same
>             mechanism as OLSRv2: when ever there is a need to update
>             the OLSRv2 routing set, the multi-path routing set is
>             updated.
>
>             In reactive mode, all the Multi-path routing tuples are
>             removed when the "topology graph" is changed.  The new
>             tuples are recreated "on-demand".
>
>             CMD> OK, let’s think about that in the reactive case.
>             (Proactive is easy, but it needs to be said, which it
>             isn’t.) You want a set, you generate it on demand. There
>             is a change to the Topology Graph. So do you recalculate
>             the set?
>
>         No, at this point, we only clear the entire Multi-path Routing
>         Set.
>
>             If not then you introduce a stutter, as the packets are
>             flowing and the set disappears and you need to trigger it
>             again.
>
>         Yes, it necessary to trigger the calculation again. But the
>         time required is trivial, because this is only local: no
>         additional message exchange with other routers is required.
>
>             Which means monitoring for that throughout a flow, not
>             just at its start.
>
>         We don't actually have the concept "flow" in this extension.
>         For each datagram, yes, it's necessary to check if a tuple
>         exist or not. There is no much difference from checking the
>         FIB for IP.
>
>             If you do (recalculate the set when the graph changes) how
>             do you know when to stop calculating it? That depends on
>             knowing when the flow stops.
>
>             And “the Topology Graph changes” is more than is required
>             - some changes to the graph would have no effect (for
>             example the increase in metric of a link not being used).
>             But it’s hard to specify.
>
>         For the moment, we simply take "the topology graph changes",
>         because even links that not used might matters: for example,
>         the decrease in metric of a not used metric that introduces a
>         better path.
>
>         It's true that it's possible that it's more than required and
>         could be optimised in the future, but considering it's a
>         reactive approach, I believe it's acceptable.
>
>             On this point (which changes) some sort of permissive
>             wording to indicate that you can avoid making changes when
>             you know they don’t matter is probably right. The when do
>             you stop calculating question is more important - and
>             needs text discussing it.
>
>
>                 You could when acting reactively forward by usual
>                 means in all cases while waiting.
>
>                 The actual packet forwarding by round-robin is an IP
>                 process, not this protocol. Needs to not be buried in
>                 8.4. And if it’s an IP process, why mandate exactly
>                 how it’s used?
>
>             Choosing which path to put in the source routing header is
>             olsrv2-multipath specific, because there are multiple of
>             them. Of course, using round-robin is not mandatory --
>             using other schedulers won't impact the compatibility.
>             Actually, we put it as one of the experiment points also:
>
>                 / Different path-selection schedulers. By default,
>                 Round-Robin
>                       scheduling is used to select a path to be used
>                 for datagrams.  In
>                       some scenarios, weighted scheduling can be
>                 considered: for
>                       example, the paths with lower metrics (i.e.,
>                 higher quality) can
>                       transfer more datagrams compared to paths with
>                 higher metrics./
>
>             CMD> This is missing my point. It’s not the round-robin
>             that matters, it’s that IP needs to do anything. That’s
>             what needs not to be buried. Putting together a clear
>             “what IP needs to do” section early on, perhaps in the
>             applicability section, is needed.
>
>         We added the following text in the applicability statement:
>
>         /MP-OLSRv2 supports two different, but interoperable
>         multi-path calculation approaches: proactive and reactive. In
>         the proactive calculation, the paths to all the destinations
>         are calculated before needed. In the reactive calculation,
>         only the paths to desired destination(s) are calculated on
>         demand. The proactive approach requires more computational
>         resources than the reactive one. The reactive approach
>         requires the IP forwarding plan to trigger the multi-path
>         calculation./
>
>         /MP-OLSRv2 forwards datagrams using the source routing header.
>         As there are multiple paths to each destination, MP-OLSRv2
>         requires the IP forwarding plan to be able to choose which
>         source route to be put in the source routing header based on
>         the path scheduler defined by MP-OLSRv2. For IPv4 networks,
>         implementation of loose source routing is required following
>         [RFC0791]. For IPv6 networks, implementation of strict source
>         routing is required following [RFC6554]./
>
>         As usual, an updated draft is attached, in case needed.
>
>         regards
>
>         Jiazi
>
>         <draft-ietf-manet-olsrv2-multipath.txt>
>
>     _______________________________________________
>     manet mailing list
>     manet@ietf.org <mailto:manet@ietf.org>
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>
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-- 
----------------
Benoît Parrein
Maître de Conférences (HDR)
Université de Nantes (Polytech Nantes), laboratoire IRCCyN
web: http://www.irccyn.ec-nantes.fr/~parrein/
tel: +33(0)240683050


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    we talk about packet erasure coding there with an identifier of
    received packets. the bytes arrive in order and correctly (if they
    arrive). a reformulation about this point will be done.<br>
    <br>
    cheers<br>
    bparrein<br>
    <br>
    <br>
    <div class="moz-cite-prefix">Le 21/06/2016 10:39, Dearlove,
      Christopher (UK) a écrit :<br>
    </div>
    <blockquote
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Reed
            Solomon itself needs the bytes in order. Possibly a
            packaging of it may be able to cope.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007E7E">--
                <o:p></o:p></span></b></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#007E7E">Christopher
                Dearlove<br>
                Senior Principal Engineer<br>
                BAE Systems Applied Intelligence Laboratories<br>
              </span></b><b><span
style="font-size:11.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#BEBEBE">__________________________________________________________________________<br>
              </span></b><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#00007E"><br>
            </span><b><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7D7D7D">T</span></b><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7D7D7D">:
               +44 (0)1245 242194  |  <b>E:
              </b><a moz-do-not-send="true"
                href="mailto:chris.dearlove@baesystems.com">chris.dearlove@baesystems.com</a><br>
            </span><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#00007E"><br>
            </span><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B92">BAE
              Systems Applied Intelligence, Chelmsford Technology Park,
              Great Baddow, Chelmsford, Essex CM2 8HN.<br>
              <a moz-do-not-send="true"
                href="http://www.baesystems.com/ai"><span
                  style="color:#3A8B92">www.baesystems.com/ai</span></a><o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B92">BAE
              Systems Applied Intelligence Limited<br>
              Registered in England &amp; Wales No: 01337451<o:p></o:p></span></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B92">Registered
              Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"
                  lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"
                lang="EN-US"> Benoit Parrein
                [<a class="moz-txt-link-freetext" href="mailto:benoit.parrein@univ-nantes.fr">mailto:benoit.parrein@univ-nantes.fr</a>]
                <br>
                <b>Sent:</b> 21 June 2016 08:14<br>
                <b>To:</b> Christopher Dearlove<br>
                <b>Cc:</b> Jiazi YI; Dearlove, Christopher (UK); MANET
                IETF<br>
                <b>Subject:</b> Re: [manet]
                draft-ietf-olsrv2-multipath-09<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div style="border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt
          2.0pt">
          <p class="MsoNormal"
            style="text-align:center;background:white" align="center"><span
style="font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
          <div>
            <p class="MsoNormal"
              style="text-align:center;background:white" align="center"><b><span
style="font-size:15.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972">***
                  WARNING ***<o:p></o:p></span></b></p>
          </div>
          <div>
            <p class="MsoNormal"
              style="margin-bottom:12.0pt;text-align:center;background:white"
              align="center">
              <em><span
style="font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972">This
                  message originates from outside our organisation,
                  either from an external partner or the internet.</span></em><i><span
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                      you feel the email is suspicious, please follow
                      <a moz-do-not-send="true"
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                        process</a>.</span></em></span></i><span
style="font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><o:p></o:p></span></p>
          </div>
        </div>
        <div>
          <p class="MsoNormal">hi christopher<o:p></o:p></p>
        </div>
        <div>
          <p class="MsoNormal">you are right. a reformulation seems to
            be necessary.<o:p></o:p></p>
        </div>
        <div>
          <p class="MsoNormal">but most of fec methods (reed solomon,
            ldpc, mojette...) can decode in any order of reception
            (hopefully)<o:p></o:p></p>
        </div>
        <div>
          <p class="MsoNormal">thanks for your comment<o:p></o:p></p>
        </div>
        <div>
          <p class="MsoNormal">bparrein<o:p></o:p></p>
        </div>
        <div>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><br>
            Le 21 juin 2016 à 01:02, Christopher Dearlove &lt;<a
              moz-do-not-send="true"
              href="mailto:christopher.dearlove@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:christopher.dearlove@gmail.com">christopher.dearlove@gmail.com</a></a>&gt;
            a écrit :<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <div>
              <p class="MsoNormal">"Because the encoded blocks are
                unordered for FEC" is, at best, only applicable to some
                FEC methods, it's definitely not universal.<br>
                <br>
                --  <o:p></o:p></p>
              <div>
                <p class="MsoNormal">Christopher Dearlove<o:p></o:p></p>
              </div>
            </div>
            <div>
              <p class="MsoNormal" style="margin-bottom:12.0pt"><br>
                On 20 Jun 2016, at 23:41, Jiazi YI &lt;<a
                  moz-do-not-send="true" href="mailto:ietf@jiaziyi.com"><a class="moz-txt-link-abbreviated" href="mailto:ietf@jiaziyi.com">ietf@jiaziyi.com</a></a>&gt;
                wrote:<o:p></o:p></p>
            </div>
            <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
              <div>
                <div>
                  <p class="MsoNormal">Hi, <o:p></o:p></p>
                  <div>
                    <p class="MsoNormal"><o:p> </o:p></p>
                    <div>
                      <p class="MsoNormal">On Mon, Jun 20, 2016 at 5:56
                        PM, Dearlove, Christopher (UK) &lt;<a
                          moz-do-not-send="true"
                          href="mailto:chris.dearlove@baesystems.com"
                          target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:chris.dearlove@baesystems.com">chris.dearlove@baesystems.com</a></a>&gt;
                        wrote:<o:p></o:p></p>
                      <div>
                        <div>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments
                              below.</span><o:p></o:p></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Short
                              version, still some points I think can be
                              improved. Down to one sticking point, on
                              deciding on how to handle changes to, and
                              cessation of, the reactive set. (Longer
                              text below.) I think this is a real issue.
                              Take a look at what you do in your
                              implementation - now see if someone could
                              work out to do that from the text. I don’t
                              think they can.</span><o:p></o:p></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                        </div>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">we clarified this in the
                          draft. Please check the our detailed reply
                          below. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">&lt;snip&gt; <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #CCCCCC 1.0pt;padding:0cm 0cm 0cm
                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <blockquote
                                      style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
                                        Page 5, second bullet. How does
                                        FEC help with packet
                                        re-ordering?<o:p></o:p></p>
                                    </blockquote>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Normally,
                                        the packets are coded in
                                        different "blocks" and those
                                        blocks are transmitted in
                                        different paths. The arriving
                                        order of those "blocks" is less
                                        important. <o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMD&gt;
                                          I still don’t see how it helps
                                          with packet re-ordering.</span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">When FEC is applied, the
                          encoder takes one or several packets and
                          produce several coded blocks (denoted block-1,
                          block-2, ... block-n). Those blocks are
                          forwarded as IP datagrams in the disjoint
                          paths. Because the encoded blocks are
                          unordered for FEC, the arriving order of the
                          encoded blocks of the same packet(s) doesn't
                          really matter. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">&lt;snip&gt;<o:p></o:p></p>
                                    </div>
                                    <blockquote
                                      style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Page
                                        6, first paragraph. I still
                                        disagree with characterising as
                                        low data rate links. At most the
                                        protocol multiplies capacity by
                                        a small factor, not the orders
                                        pf magnitude that link
                                        capacities span.<o:p></o:p></p>
                                    </blockquote>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We
                                        won't claim that there will be
                                        orders of magnitude that link
                                        capacities span, but it would be
                                        beneficial to have aggregated
                                        throughput and load balancing. <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">So
                                        what do you think of:<o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">MP-OLSRv2
                                        is designed for networks with
                                        dynamic topology by avoiding
                                        single route failure. It can
                                        also provide higher aggregated
                                        throughput and load balancing,
                                        which is beneficial for low data
                                        rate links.  <o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMD&gt;
                                          Still not convinced by the
                                          phrase low data rate links.
                                          The issues are ones of load
                                          relative to network capacity,
                                          and in particular if there are
                                          underutilised parts of the
                                          network. Plus of course a
                                          redundancy issue if packets do
                                          not all need to arrive. These
                                          can all occur in high data
                                          rate networks as much as low
                                          data rate ones.</span><o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">It makes sense. I'm OK with
                          removing the text related to low data rate
                          links. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">&lt;snip&gt;<o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <blockquote
                                      style="border:none;border-left:solid
                                      #CCCCCC 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">PT_…
                                        What about hop count? Elsewhere
                                        in OLSRv2 we record that as well
                                        (e.g Routing Set).<o:p></o:p></p>
                                    </blockquote>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Actually,
                                        the number of the items in the
                                        array PT_address[1...n] already
                                        gives the hop count -- is it
                                        necessary to repeat the
                                        information with an additional
                                        field? It is not used anyways. <o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMD&gt;
                                          That it’s there could be
                                          called out. It gets used in
                                          OLSRv2 as a suggested
                                          tie-breaker, and some tools
                                          might use it. I thought I’d
                                          made a comment to say what n
                                          is, which I don’t see here.
                                          This can combine with that</span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">Yes. we added some text on
                          what "n" is. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">&lt;snip&gt;<o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <blockquote
                                      style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">A
                                        major omission is discussion of
                                        expiry of new Tuples without
                                        expiry times. If proactive you
                                        can (but don’t) discuss when
                                        supporting sets change. <o:p></o:p></p>
                                    </blockquote>
                                    <blockquote
                                      style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If
                                        reactive it’s rather a mess (a
                                        reason I dislike the reactive
                                        mechanism). When to discard?
                                        When to recreate? If dependent
                                        on packet flow then that’s
                                        another interaction with IP to
                                        document - and implement.<o:p></o:p></p>
                                    </blockquote>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The
                                        update of the the Multi-path
                                        routing set is described in
                                        section 8.6. The expiry timers
                                        are removed since -07 based on
                                        the comments received. One of
                                        the reasons is to be consistent
                                        with the OLSRv2 routing set, in
                                        which no expiry timer is used. <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Generally
                                        speaking, in proactive mode, it
                                        follows the same mechanism as
                                        OLSRv2: when ever there is a
                                        need to update the OLSRv2
                                        routing set, the multi-path
                                        routing set is updated. <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In
                                        reactive mode, all the
                                        Multi-path routing tuples are
                                        removed when the "topology
                                        graph" is changed.  The new
                                        tuples are recreated
                                        "on-demand". <o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMD&gt;
                                          OK, let’s think about that in
                                          the reactive case. (Proactive
                                          is easy, but it needs to be
                                          said, which it isn’t.) You
                                          want a set, you generate it on
                                          demand. There is a change to
                                          the Topology Graph. So do you
                                          recalculate the set?
                                        </span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">No, at this point, we only
                          clear the entire Multi-path Routing Set. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">If
                                          not then you introduce a
                                          stutter, as the packets are
                                          flowing and the set disappears
                                          and you need to trigger it
                                          again. </span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">Yes, it necessary to
                          trigger the calculation again. But the time
                          required is trivial, because this is only
                          local: no additional message exchange with
                          other routers is required. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Which
                                          means monitoring for that
                                          throughout a flow, not just at
                                          its start.
                                        </span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">We don't actually have the
                          concept "flow" in this extension. For each
                          datagram, yes, it's necessary to check if a
                          tuple exist or not. There is no much
                          difference from checking the FIB for IP. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">If
                                          you do (recalculate the set
                                          when the graph changes) how do
                                          you know when to stop
                                          calculating it? That depends
                                          on knowing when the flow
                                          stops.</span> <o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">And
                                          “the Topology Graph changes”
                                          is more than is required -
                                          some changes to the graph
                                          would have no effect (for
                                          example the increase in metric
                                          of a link not being used). But
                                          it’s hard to specify.
                                        </span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">For the moment, we simply
                          take "the topology graph changes", because
                          even links that not used might matters: for
                          example, the decrease in metric of a not used
                          metric that introduces a better path.  <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">It's true that it's
                          possible that it's more than required and
                          could be optimised in the future, but
                          considering it's a reactive approach, I
                          believe it's acceptable. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #CCCCCC 1.0pt;padding:0cm 0cm 0cm
                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">On
                                          this point (which changes)
                                          some sort of permissive
                                          wording to indicate that you
                                          can avoid making changes when
                                          you know they don’t matter is
                                          probably right. The when do
                                          you stop calculating question
                                          is more important - and needs
                                          text discussing it.</span> <o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <blockquote style="border:none;border-left:solid
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                        6.0pt;margin-left:4.8pt;margin-right:0cm">
                        <div>
                          <div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <blockquote
                                      style="border:none;border-left:solid
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6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
                                        You could when acting reactively
                                        forward by usual means in all
                                        cases while waiting.<br>
                                        <br>
                                        The actual packet forwarding by
                                        round-robin is an IP process,
                                        not this protocol. Needs to not
                                        be buried in 8.4. And if it’s an
                                        IP process, why mandate exactly
                                        how it’s used?<o:p></o:p></p>
                                    </blockquote>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Choosing
                                        which path to put in the source
                                        routing header is
                                        olsrv2-multipath specific,
                                        because there are multiple of
                                        them. Of course, using
                                        round-robin is not mandatory --
                                        using other schedulers won't
                                        impact the compatibility.
                                        Actually, we put it as one of
                                        the experiment points also:<o:p></o:p></p>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                    </div>
                                    <div>
                                      <blockquote
                                        style="border:none;border-left:solid
                                        #CCCCCC 1.0pt;padding:0cm 0cm
                                        0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i> Different
                                            path-selection schedulers. 
                                            By default, Round-Robin<br>
                                                  scheduling is used to
                                            select a path to be used for
                                            datagrams.  In<br>
                                                  some scenarios,
                                            weighted scheduling can be
                                            considered: for<br>
                                                  example, the paths
                                            with lower metrics (i.e.,
                                            higher quality) can<br>
                                                  transfer more
                                            datagrams compared to paths
                                            with higher metrics.</i><o:p></o:p></p>
                                      </blockquote>
                                    </div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">CMD&gt;
                                          This is missing my point. It’s
                                          not the round-robin that
                                          matters, it’s that IP needs to
                                          do anything. That’s what needs
                                          not to be buried. Putting
                                          together a clear “what IP
                                          needs to do” section early on,
                                          perhaps in the applicability
                                          section, is needed.</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><o:p></o:p></p>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">We added the following text
                          in the applicability statement:<o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <div>
                          <p class="MsoNormal"><i>MP-OLSRv2 supports two
                              different, but interoperable multi-path
                              calculation approaches: proactive and
                              reactive. In the proactive calculation,
                              the paths to all the destinations are
                              calculated before needed. In the reactive
                              calculation, only the paths to desired
                              destination(s) are calculated on demand.
                              The proactive approach requires more
                              computational resources than the reactive
                              one. The reactive approach requires the IP
                              forwarding plan to trigger the multi-path
                              calculation.</i><o:p></o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><o:p> </o:p></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><i>MP-OLSRv2 forwards
                              datagrams using the source routing header.
                              As there are multiple paths to each
                              destination, MP-OLSRv2 requires the IP
                              forwarding plan to be able to choose which
                              source route to be put in the source
                              routing header based on the path scheduler
                              defined by MP-OLSRv2. For IPv4 networks,
                              implementation of loose source routing is
                              required following [RFC0791]. For IPv6
                              networks, implementation of strict source
                              routing is required following [RFC6554].</i><o:p></o:p></p>
                        </div>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">As usual, an updated draft
                          is attached, in case needed. <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">regards<o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal">Jiazi<o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><o:p> </o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"> <o:p></o:p></p>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </blockquote>
            <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
              <div>
                <p class="MsoNormal">&lt;draft-ietf-manet-olsrv2-multipath.txt&gt;<o:p></o:p></p>
              </div>
            </blockquote>
          </div>
        </blockquote>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <p class="MsoNormal">_______________________________________________<br>
              manet mailing list<br>
              <a moz-do-not-send="true" href="mailto:manet@ietf.org">manet@ietf.org</a><br>
              <a moz-do-not-send="true"
                href="https://www.ietf.org/mailman/listinfo/manet">https://www.ietf.org/mailman/listinfo/manet</a><o:p></o:p></p>
          </div>
        </blockquote>
      </div>
      <p>********************************************************************<br>
        This email and any attachments are confidential to the intended<br>
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      <pre wrap="">_______________________________________________
manet mailing list
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</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
----------------
Benoît Parrein
Maître de Conférences (HDR)
Université de Nantes (Polytech Nantes), laboratoire IRCCyN
web: <a class="moz-txt-link-freetext" href="http://www.irccyn.ec-nantes.fr/~parrein/">http://www.irccyn.ec-nantes.fr/~parrein/</a>
tel: +33(0)240683050</pre>
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--------------040908070500020607050502--


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===============================================================================

*                  *** NEW SUBMISSION DEADLINE: June 23, 2016 ***
* Please register your paper early, updates are possible until the deadline!

===============================================================================
===============================================================================

            ACM CHANTS 2016 - 11th Workshop on Challenged Networks            

                       co-located with ACM MobiCom 2016                       
                        October 7, 2016, New York, USA

                             www.acm-chants.org                              

===============================================================================
===============================================================================


Challenged networks comprise those situations where communication is desired,
but traditional Internet architectures fail to provide it effectively. Such
networks may be characterized by intermittent connectivity, a heterogeneous mix
of nodes, frequent nodal churn, and widely varying network conditions. Examples
of challenged networks include deployments in rural and remote areas, networks
to support emergency response operations, inter-planetary networks, sensor and
wildlife monitoring networks, underwater networks, road vehicle networks, and,
more recently, networks of micro aerial vehicles. The applications of challenged
networks range from time-critical communications such as for disaster relief to
delay-tolerant transmission in poorly connected regions or where censorship
should be counteracted. However, challenged networking has also found many
applications in everyday settings, for which they were not initially conceived,
such as opportunistic networking supporting data-centric communications, traffic
offloading from cellular networks, mobile cloud/edge computing, opportunistic
and participatory sensing, challenged IoT. The increasing availability of
wireless communications in embedded devices as well as integration of
technologies such as Wi-Fi direct on Android platforms and LTE's D2D
(device-to-device) communication on general purpose mobile devices, will further
push the development of challenged networking solutions. Challenged networking
has also chartered new directions for inter-disciplinary research, e.g.,
applying findings from social networks and network science.

This workshop builds on the success of the ten previous CHANTS workshops, and
WDTN 2005, and aims to stimulate research on the most novel topics of challenged
networking research. This year's edition encourages submission of theoretical
and experimental work (including studies of real deployment), with a primary
interest in the **new directions of challenged networking such as mobile
cloud/mobile edge computing, IoT, mobile data offloading, and challenged SDN**.
The workshop seeks original work presented in the form of research papers
describing new research approaches and results, as well as demo submissions.
Highly disruptive work-in-progress and position papers are also welcome,
provided they focus on particularly innovative, out-of-the-box, solutions or
applications for challenged networks. All papers shall be forward-looking,
describe their relationship to existing work, and shall argue their impact and
implications for ongoing or future research.

Topics of interest include, but are not limited to:

- Delay/disruption-tolerant networks (DTNs), opportunistic communication and computing
- Architecture, design, and implementation of communication systems for challenged networks
- Modeling, analysis, and characterization of challenged networks and protocols
- Challenged networking techniques for mobile cloud computing
- Mobile data offloading via challenged networks
- Challenged networking techniques for participatory and opportunistic sensing
- Challenged networking in the Internet of Things
- Big data analytics in challenged networking
- Software-defined networking in challenged environments
- Security/trust/privacy concerns and solutions in challenged networks
- Energy-efficient communication in challenged networks
- Information centric and content-centric networking in challenged networks
- Real-world mobility trace collection, analysis, and modeling for challenged environments
- Network science methods for challenged networks
- Network coding in challenged networks
- Novel challenged networking systems (e.g., networks of micro aerial vehicles)
- Real deployment and case studies in various stages of use
- Disrupted scenarios for challenged networks (e.g., disaster relief and emergency management)
- Daily use applications (e.g., mobile social networking, crowdsourcing, censorship evasion, sensor networks, smart cities)
- Test and simulation tools for evaluating challenged network systems
- Configuration, management, and monitoring of challenged networks.

PAPER FORMAT AND SUBMISSION INSTRUCTIONS
----------------------------------------
Submitted papers must be no longer than 6 pages, and should adhere to the
standard ACM conference proceedings format. Demo proposals (to be published as
part of the proceedings) must not be longer than 2 pages plus 1 page description
of the precise setup and requirements (the 1-page setup description will not be
published in the proceedings). Reviews will be single-blinded. Papers should
neither have been published elsewhere nor being currently under review by
another conference or journal.


EDITORIAL FOLLOW-UPS
--------------------
Extended versions of the selected workshop papers will be considered for
possible fast track publication on the Computer Communications Journal
(Elsevier), in a special section on Challenged Networks.

IMPORTANT DATES
---------------

- Submission Deadline (extended): 23 June 2016
- Acceptance Notification:        22 July 2016
- Camera Ready Due:              5 August 2016
- Workshop:                     7 October 2016


PROGRAM COMMITTEE CHAIRS
------------------------
Chiara Boldrini (IIT-CNR, Italy)
Marcelo Dias de Amorim (UPMC and CNRS, France)

TECHNICAL PROGRAM COMMITTEE
---------------------------
Kevin Almeroth (UC-Santa Barbara, USA)
Mostafa Ammar (Georgia Institute of Technology, USA)
Fehmi Ben Abdesslem (SICS Swedish ICT, Sweden)
Guohong Cao (The Pennsylvania State University, USA)
Marco Cello (Nokia Bell Labs)
Vania Conan (Thales Communications & Security, France)
Luis Costa (Universidade Federal do Rio de Janeiro, Brazil)
Do Young Eun (North Carolina State University, USA)
Kevin Fall (Carnegie Mellon University, USA)
Stephen Farrell (Trinity College Dublin, Ireland)
Domenico Giustiniano (IMDEA Networks Institute, Spain)
Tristan Henderson (University of St Andrews, UK)
Andrea Hess (Trinity College Dublin, Ireland)
Pan Hui (Hong Kong Unive. of Science and Technology)
Karin Anna Hummel (JKU Linz, Austria)
Mohan Kumar (Rochester Institute of Technology, USA)
Kyunghan Lee (UNIST, Korea)
Anders Lindgren (SICS Swedish ICT, Sweden)
Mirco Musolesi (University College London, UK)
Katia Obraczka (UC Santa Cruz, USA)
Melek Onen (Eurecom, France)
Joerg Ott (Technische Universitat Munchen, Germany)
Elena Pagani (Universita degli Studi di Milano, Italy)
Andrea Passarella (IIT-CNR, Italy)
Eric Rozner (IBM Research, USA)
Pavlos Sermpezis (FORTH, Greece)
Thrasyvoulos Spyropoulos (Eurecom, France)
Stavros Toumpis (Athens University of Economics and Business, Greece)
Thierry Turletti (INRIA, France)
Yu Wang (University of North Carolina at Charlotte, USA)
Eiko Yoneki (University of Cambridge, UK)
Xiaolan Zhang (Fordham University, USA)

WEB CHAIR
---------
Fehmi Ben Abdesslem (SICS Swedish ICT, Sweden)

PUBLICITY CHAIR
---------------
Elisabetta Biondi (IIT-CNR, Italy)

STEERING COMMITTEE
------------------
Kevin Almeroth (UC Santa Barbara, USA)
Kevin Fall (Carnegie Mellon University, USA)
Stephen Farrell (Trinity College Dublin, Ireland)
Jorg Ott (Technische Universitat Munchen, Germany)
Andrea Passarella (IIT-CNR, Italy)


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--001a114e59d0d9c8bc0535cb5802
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We have issued a last call on OLSR sec threats but haven't had any feedback
from the list (unless I missed something.)  We will be moving this draft
forward tonight unless someone has something critical to say.  Please take
a look at the draft and post comments ASAP even if they are not show
stopping; the more eyes on the document and the more comments the better
the MANET drafts will be.

Justin

--001a114e59d0d9c8bc0535cb5802
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<div dir=3D"ltr">We have issued a last call on OLSR sec threats but haven&#=
39;t had any feedback from the list (unless I missed something.) =C2=A0We w=
ill be moving this draft forward tonight unless someone has something criti=
cal to say.=C2=A0 Please take a look at the draft and post comments ASAP ev=
en if they are not show stopping; the more eyes on the document and the mor=
e comments the better the MANET drafts will be.<br><br>Justin</div>

--001a114e59d0d9c8bc0535cb5802--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "draft-ietf-manet-credit-window@ietf.org" <draft-ietf-manet-credit-window@ietf.org>
Thread-Topic: AD Review of draft-ietf-manet-credit-window-04
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Stan:

Hi!  How are you?

I just finished reading this document.  First of all, thanks for taking thi=
s work on!

Please see my comments below.  I think many of the comments (even the Major=
 ones) should be easy to address.  However, I am specially concerned about =
the actions (terminate) to be taken in some of the cases =97 which, I think=
, make DLEP vulnerable.

After you address the Major comments and provide a revised ID, I will want =
to get a review from the Transport Area, probably in parallel with the IETF=
 Last Call (depending on where we are with the DLEP document).

Thanks!

Alvaro.


Major:

M1. "Credit Use Rejected" Status.  When should this Status be used?  I'm gu=
essing that maybe windowing is not supported (the router understands the fe=
ature, but doesn't support it) -- what else?  I suspect that it is up to th=
e receiver to use this status as it sees fit, is that the intent?  If so, p=
lease clearly say so.  Are there any well-known reasons that might be benef=
icial to mention?


M2. Both Sections 8.1. (DLEP Destination Up Message) and 8.2. (DLEP Destina=
tion Announce Message) say that "MUST use the value in Credit Grant as the =
initial value=85".  But given that the credit use can be rejected, the "MUS=
T" is misleading.  s/MUST/SHOULD or clarify "=85if accepted=85"


M3. It is not a requirement that Credit Windows be always implemented in bo=
th directions, right?

M3.1. Sections 5. (Operation), 8.3. (DLEP Destination Up Response Message) =
and 8.4. (DLEP Destination Announce Response Message) all say that after re=
ceiving a Credit Grant data item "the receiver MUST respond=85with a respon=
se message that contains a Credit Grant data item".  However, Section 9.1. =
(Credit Grant) says that "the receiver MUST respond with a message containi=
ng a Credit Window Status data item", which seems to be the right thing.

M3.2. It seems to me that (in 8.3 and 8.4) this text should also talk about=
 the Credit Window Status data item:
M3.2.1. (in the response): "=85if the corresponding=85message did not conta=
in a Credit Grant=85Response message MUST NOT contain a Credit Grant (Secti=
on 9.1) data item".
M3.2.2. "receiver of=85Response MUST use the received Credit Grant value to=
 initialize=85".

M3.3. Related to this point, Section 9.1. (Credit Grant) says that the "Cre=
dit Grant data item MAY appear in the DLEP Destination Up, Destination Anno=
unce, and Destination Update messages."  No  response messages are listed, =
which is ok.  I would suggest you stress that those are the only messages w=
hich can contain the data item.  Either s/MAY/MAY only, or (even better) s/=
MAY/MUST only   [I think the "MUST" is ok because the Operation section alr=
eady talks about not every destination needing credit windowing.]


M4. Credit Window Out of Sync status code.  Both 8.3 and 8.4 say that if a =
peer "detects a mismatch in the presence or absence of credit window data i=
tems=85MUST terminate the session".

M4.1. Section 7. (DLEP Status Codes for Credit-Window Extension) says lists=
 the failure mode as "Continue".  Please correct that and make sure that th=
e registration request explicitly tells IANA which range to assign the stat=
us codes from.

M4.2. It seems to me that using a "terminate" failure mode may be overkill.=
  It also seems to me that it would be straight forward to require a Credit=
 Grant data item to be sent after receiving this status code and let the se=
ssion resync on its own (or send a Credit Grant if the lack of sync is dete=
cted locally) =97 it looks like the potential impact of resetting the sessi=
on may not be justified for a single stream.  I note in the DLEP spec that =
even refusing to do something (Request Denied) has a failure mode of Contin=
ue.


M5. Section 9.2. (Credit Window Status) says that if the "local credit coun=
ts are not synchronized=85MAY either=85or o Issue a DLEP Destination Down m=
essage, to clear credit counts on the session."

M5.1. [nit] was this intended to be a bulleted list?

M5.2. The "MAY" indicates that both actions are optional.  IOW, it says tha=
t neither action has to be performed.  If that is so, then how do we get th=
e session back in sync?

M5.3. That second option (Destination Down) could also result in the routin=
g protocol (or anyone else listening to DLEP) to reset their adjacency.  As=
 I mentioned above, this action seems to be too drastic because of the effe=
ct.  Or am I missing something?

M5.4. Going back to the "MAY either" part.  When (Why) would an implementat=
ion chose not to use the least intrusive option?

M5.5. Given the potential problems with falling out to sync, why is this se=
ction not more prescriptive: "It is recommended that implementations issue =
a DLEP Destination Update with a Credit Window Status data item at a config=
urable multiple of the DLEP Heartbeat timer=85"  Maybe s/recommended/RECOMM=
ENDED


M6. Section 9.3. (Credit Request)

M6.1. "If the corresponding=85message for this session did not contain a Cr=
edit Grant data item=85then receipt of the Credit Request data item MUST be=
 considered as an error by the receiver, requiring termination of the DLEP =
peer session."  Same comment as before; very disruptive!

M6.2. There's no guidance as to what should be done when receiving a Credit=
 Request.


M7. Section 10. (Security Considerations)

M7.1. "The extension does not introduce any additional threats above those =
documented in [DLEP]."  I disagree.  The extra opportunities to reset the D=
LEP session create a potential DoS attack: a peer can (for example) send a =
Credit Request for any destination not using credits and the whole session =
is reset, potentially affecting other flows.

M7.2. "The mitigation strategy documented in that document is sufficient to=
 secure operation of this extension."  Neither "mitigation" nor "strategy" =
show up in the DLEP document =97 you'll have to be more specific.



Minor:

p1. For ease of tracking, please number the TBD values (for example TBD1, T=
BD2, etc.) throughout the document to match the requests to IANA.

p2. Section 6 is superfluous, please delete it.

p3. "Descriptions of the data items are included below."  Please put a refe=
rence.

p4. The format in Section 9.1. (Credit Grant) shows two "Credit Increment" =
fields.  From the explanation which indicates a "64-bit quantity), I'm assu=
ming that these are really not 2 independent fields, but one big (64-bits) =
"Credit Increment" field.  Please fix the figure.
P4.1. The MRW/RRW in the figure in Section 9.2 have the same problem.

p5. I don't think the reference to RFC5578 is needed.  Pointing to another =
scheme may create confusion.



Nits:

n1. Please expand on first mention: DLEP (in the abstract), RF.

n2. s/Dynamic Link Event Protocol/Dynamic Link Exchange Protocol

n3. s/draft/document

n4. Change the order of the sections putting "Credit Window Data Item Defin=
itions" before "DLEP Data Items for Credit-Window Extension".

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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Stan:</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Hi! &nbsp;How are you?</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
I just finished reading this document. &nbsp;First of all, thanks for takin=
g this work on!</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Please see my comments below. &nbsp;I think many of the comments (even the =
Major ones) should be easy to address. &nbsp;However, I am specially concer=
ned about the actions (terminate) to be taken in some of the cases =97 whic=
h, I think, make DLEP vulnerable.</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
After you address the Major comments and provide a revised ID, I will want =
to get a review from the Transport Area, probably in parallel with the IETF=
 Last Call (depending on where we are with the DLEP document).</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Thanks!</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Alvaro.</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Major:</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
M1. &quot;Credit Use Rejected&quot; Status. &nbsp;When should this Status b=
e used? &nbsp;I'm guessing that maybe windowing is not supported (the route=
r understands the feature, but doesn't support it) -- what else? &nbsp;I su=
spect that it is up to the receiver to use this status as
 it sees fit, is that the intent? &nbsp;If so, please clearly say so. &nbsp=
;Are there any well-known reasons that might be beneficial to mention?</div=
>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<font face=3D"Calibri,sans-serif"><br>
</font></div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif" style=3D"color: rgb(0, 0, 0); font-f=
amily: Calibri, sans-serif; font-size: 14px;">M2. Both Sections&nbsp;8.1. (=
DLEP Destination Up Message) and&nbsp;8.2. (DLEP Destination Announce Messa=
ge) say that &quot;</font><span style=3D"color: rgb(0, 0, 0); font-family: =
Calibri, sans-serif; font-size: 14px;">MUST&nbsp;</span><font face=3D"Calib=
ri,sans-serif" style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-ser=
if; font-size: 14px;">use
 the value in Credit Grant as the initial value=85&quot;. &nbsp;But given t=
hat the credit use can be rejected, the &quot;MUST&quot; is misleading. &nb=
sp;s/MUST/SHOULD or clarify &quot;</font><font face=3D"Calibri,sans-serif">=
=85if accepted=85&quot;</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M3. It is not a requirement that Cre=
dit Windows be always implemented in both directions, right?&nbsp;</font></=
div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M3.1. Sections&nbsp;5. (Operation),&=
nbsp;8.3. (DLEP Destination Up Response Message) and 8.4. (DLEP Destination=
 Announce Response Message) all say that after&nbsp;receiving a Credit Gran=
t data item &quot;the receiver MUST respond=85with a response
 message that contains a Credit Grant data item&quot;. &nbsp;However, Secti=
on&nbsp;9.1. (Credit Grant) says that &quot;the receiver MUST respond with =
a message containing a Credit Window Status data item&quot;, which seems to=
 be the right thing.</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M3.2. It seems to me that (in 8.3 an=
d 8.4) this text should also talk about the Credit Window Status data item:=
</font></div>
<div><font face=3D"Calibri,sans-serif">M3.2.1. (in the&nbsp;</font><font fa=
ce=3D"Calibri,sans-serif">response): &quot;=85if the corresponding=85messag=
e did not contain</font><font face=3D"Calibri,sans-serif">&nbsp;a Credit Gr=
ant=85Response&nbsp;</font><span style=3D"font-family: Calibri, sans-serif;=
">message
 MUST NOT contain a Credit Grant (Section 9.1) data item&quot;.</span></div=
>
<div><font face=3D"Calibri,sans-serif">M3.2.2. &quot;receiver of=85Response=
 MUST use the received Credit&nbsp;</font><span style=3D"font-family: Calib=
ri, sans-serif;">Grant value to initialize</span><font face=3D"Calibri,sans=
-serif">=85&quot;.</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div>M3.3. Related to this point, Section&nbsp;9.1. (Credit Grant) says tha=
t the &quot;Credit Grant data item MAY appear in the DLEP Destination Up, D=
estination Announce, and Destination Update messages.&quot; &nbsp;No &nbsp;=
response messages are listed, which is ok. &nbsp;I would suggest
 you stress that those are the only messages which can contain the data ite=
m. &nbsp;Either s/MAY/MAY only, or (even better) s/MAY/MUST only &nbsp; [I =
think the &quot;MUST&quot; is ok because the Operation section already talk=
s about not every destination needing credit windowing.]</div>
<div><br>
</div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M4. Credit Window Out of Sync status=
 code. &nbsp;Both 8.3 and 8.4 say that if a peer &quot;</font><span style=
=3D"font-family: Calibri, sans-serif;">detects a mismatch in the presence o=
r absence&nbsp;</span><span style=3D"font-family: Calibri, sans-serif;">of
 credit window data items</span><font face=3D"Calibri,sans-serif">=85MUST t=
erminate the session&quot;.</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M4.1. Section&nbsp;</font><font face=
=3D"Calibri,sans-serif">7. (DLEP Status Codes for Credit-Window Extension) =
says lists the failure mode as &quot;Continue&quot;. &nbsp;Please correct t=
hat and make sure that the registration request explicitly
 tells IANA which range to assign the status codes from.</font></div>
<div><br>
</div>
<div>M4.2. It seems to me that using a &quot;terminate&quot; failure mode m=
ay be overkill. &nbsp;It also seems to me that it would be straight forward=
 to require a Credit Grant data item to be sent after receiving this status=
 code and let the session resync on its own (or
 send a Credit Grant if the lack of sync is detected locally) =97 it looks =
like the potential impact of resetting the session may not be justified for=
 a single stream. &nbsp;I note in the DLEP spec that even refusing to do so=
mething (Request Denied) has a failure
 mode of Continue.</div>
<div><br>
</div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M5. Section&nbsp;9.2. (Credit Window=
 Status) says that if the &quot;</font><span style=3D"font-family: Calibri,=
 sans-serif;">local credit&nbsp;</span><span style=3D"font-family: Calibri,=
 sans-serif;">counts are not synchronized</span><font face=3D"Calibri,sans-=
serif">=85MAY
 either</font><font face=3D"Calibri,sans-serif">=85or o Issue a DLEP Destin=
ation&nbsp;</font><span style=3D"font-family: Calibri, sans-serif;">Down me=
ssage, to clear credit counts on the session.&quot;</span></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M5.1. [nit] was this&nbsp;intended t=
o be a bulleted list?</font></div>
<div><br>
</div>
<div>M5.2. The &quot;MAY&quot; indicates that both actions are optional. &n=
bsp;IOW, it says that neither action has to be performed. &nbsp;If that is =
so, then how do we get the session back in sync?</div>
<div><br>
</div>
<div>M5.3. That second option (Destination Down) could also result in the r=
outing protocol (or anyone else listening to DLEP) to reset their adjacency=
. &nbsp;As I mentioned above, this action seems to be too drastic because o=
f the effect. &nbsp;Or am I missing something?</div>
<div><br>
</div>
<div>M5.4. Going back to the &quot;MAY either&quot; part. &nbsp;When (Why) =
would an implementation chose not to use the least intrusive option?</div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M5.5. Given the potential problems w=
ith falling out to sync, why is this section not more prescriptive: &quot;<=
/font>It is recommended that implementations issue a DLEP Destination&nbsp;=
Update with a Credit Window Status data item
 at a configurable&nbsp;<font face=3D"Calibri,sans-serif">multiple of the D=
LEP Heartbeat timer</font><font face=3D"Calibri,sans-serif">=85&quot; &nbsp=
;Maybe s/recommended/RECOMMENDED</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M6. Section&nbsp;</font><font face=
=3D"Calibri,sans-serif">9.3. (Credit Request)&nbsp;</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M6.1. &quot;</font><span style=3D"fo=
nt-family: Calibri, sans-serif;">If the corresponding</span><font face=3D"C=
alibri,sans-serif">=85message for this session did not contain a&nbsp;</fon=
t>Credit Grant data item=85then receipt of the Credit
 Request data item MUST be considered as an error by the receiver, requirin=
g termination of the DLEP peer session.&quot; &nbsp;Same comment as before;=
 very disruptive!</div>
<div><br>
</div>
<div>M6.2. There's no guidance as to what should be done when receiving a C=
redit Request.</div>
<div><br>
</div>
<div><br>
</div>
<div>M7. Section&nbsp;10. (Security Considerations)</div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M7.1. &quot;</font><span style=3D"fo=
nt-family: Calibri, sans-serif;">The&nbsp;</span><span style=3D"font-family=
: Calibri, sans-serif;">extension does not introduce any additional threats=
 above those&nbsp;</span><font face=3D"Calibri,sans-serif">documented
 in [DLEP].&quot; &nbsp;I disagree. &nbsp;The extra opportunities to reset =
the DLEP session create a&nbsp;potential DoS attack: a peer can (for exampl=
e) send a Credit Request for any destination not using credits and the whol=
e session is reset, potentially affecting other flows.</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">M7.2. &quot;</font><font face=3D"Cal=
ibri,sans-serif">The mitigation strategy documented in that document is suf=
ficient to&nbsp;</font><font face=3D"Calibri,sans-serif">secure operation o=
f this extension.&quot; &nbsp;Neither &quot;mitigation&quot; nor &quot;stra=
tegy&quot;
 show up in the DLEP document&nbsp;=97&nbsp;you'll have to be more specific=
.</font></div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Minor:</div>
<div><br>
</div>
<div>p1. For ease of tracking, please number the TBD values (for example TB=
D1, TBD2, etc.) throughout the document to match the requests to IANA.</div=
>
<div><br>
</div>
<div>p2. Section 6 is superfluous, please delete it.</div>
<div><br>
</div>
<div>p3. &quot;Descriptions of the data items are included below.&quot; &nb=
sp;Please put a reference.</div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">p4. The format in Section&nbsp;</fon=
t><span style=3D"font-family: Calibri, sans-serif;">9.1. (Credit Grant) sho=
ws two &quot;</span><font face=3D"Calibri,sans-serif">Credit Increment&quot=
; fields. &nbsp;From the explanation which indicates a &quot;64-bit
 quantity),&nbsp;I'm assuming that these are really not 2 independent field=
s, but one big (64-bits) &quot;</font><font face=3D"Calibri,sans-serif">Cre=
dit Increment&quot; field. &nbsp;Please fix the figure.</font></div>
<div><font face=3D"Calibri,sans-serif">P4.1. The MRW/RRW in the figure in S=
ection 9.2 have the same&nbsp;problem.</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">p5. I don't think the reference to R=
FC5578 is needed. &nbsp;Pointing to another scheme may create confusion.</f=
ont></div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Nits:</div>
<div><br>
</div>
<div>n1. Please expand on first mention: DLEP (in the abstract), RF.</div>
<div><br>
</div>
<div>n2. s/Dynamic Link Event Protocol/Dynamic Link Exchange Protocol</div>
<div><br>
</div>
<div>n3. s/draft/document</div>
<div><br>
</div>
<div>n4. Change the order of the sections putting &quot;Credit Window Data =
Item Definitions&quot; before &quot;DLEP Data Items for Credit-Window Exten=
sion&quot;.</div>
</body>
</html>

--_000_D3874F5312E5F6aretanaciscocom_--


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We will add some text to make it more precise.

best

Jiazi

On Tue, Jun 21, 2016 at 1:02 AM, Christopher Dearlove <
christopher.dearlove@gmail.com> wrote:

> "Because the encoded blocks are unordered for FEC" is, at best, only
> applicable to some FEC methods, it's definitely not universal.
>
> --
> Christopher Dearlove
>
> On 20 Jun 2016, at 23:41, Jiazi YI <ietf@jiaziyi.com> wrote:
>
> Hi,
>
> On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <
> chris.dearlove@baesystems.com> wrote:
>
>> Comments below.
>>
>>
>>
>> Short version, still some points I think can be improved. Down to one
>> sticking point, on deciding on how to handle changes to, and cessation o=
f,
>> the reactive set. (Longer text below.) I think this is a real issue. Tak=
e a
>> look at what you do in your implementation - now see if someone could wo=
rk
>> out to do that from the text. I don=E2=80=99t think they can.
>>
>>
>>
>
> we clarified this in the draft. Please check the our detailed reply below=
.
>
> <snip>
>
>>
>> Page 5, second bullet. How does FEC help with packet re-ordering?
>>
>>
>>
>> Normally, the packets are coded in different "blocks" and those blocks
>> are transmitted in different paths. The arriving order of those "blocks"=
 is
>> less important.
>>
>>
>>
>> CMD> I still don=E2=80=99t see how it helps with packet re-ordering.
>>
>
> When FEC is applied, the encoder takes one or several packets and produce
> several coded blocks (denoted block-1, block-2, ... block-n). Those block=
s
> are forwarded as IP datagrams in the disjoint paths. Because the encoded
> blocks are unordered for FEC, the arriving order of the encoded blocks of
> the same packet(s) doesn't really matter.
>
>
>>
>>
>> <snip>
>>
>> Page 6, first paragraph. I still disagree with characterising as low dat=
a
>> rate links. At most the protocol multiplies capacity by a small factor, =
not
>> the orders pf magnitude that link capacities span.
>>
>>
>>
>> We won't claim that there will be orders of magnitude that link
>> capacities span, but it would be beneficial to have aggregated throughpu=
t
>> and load balancing.
>>
>>
>>
>> So what do you think of:
>>
>>
>>
>> MP-OLSRv2 is designed for networks with dynamic topology by avoiding
>> single route failure. It can also provide higher aggregated throughput a=
nd
>> load balancing, which is beneficial for low data rate links.
>>
>>
>>
>> CMD> Still not convinced by the phrase low data rate links. The issues
>> are ones of load relative to network capacity, and in particular if ther=
e
>> are underutilised parts of the network. Plus of course a redundancy issu=
e
>> if packets do not all need to arrive. These can all occur in high data r=
ate
>> networks as much as low data rate ones.
>>
>>
>>
>
> It makes sense. I'm OK with removing the text related to low data rate
> links.
>
> <snip>
>
>
>> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as=
 well
>> (e.g Routing Set).
>>
>>
>>
>> Actually, the number of the items in the array PT_address[1...n] already
>> gives the hop count -- is it necessary to repeat the information with an
>> additional field? It is not used anyways.
>>
>>
>>
>> CMD> That it=E2=80=99s there could be called out. It gets used in OLSRv2=
 as a
>> suggested tie-breaker, and some tools might use it. I thought I=E2=80=99=
d made a
>> comment to say what n is, which I don=E2=80=99t see here. This can combi=
ne with that
>>
>
> Yes. we added some text on what "n" is.
>
> <snip>
>
>> A major omission is discussion of expiry of new Tuples without expiry
>> times. If proactive you can (but don=E2=80=99t) discuss when supporting =
sets
>> change.
>>
>> If reactive it=E2=80=99s rather a mess (a reason I dislike the reactive
>> mechanism). When to discard? When to recreate? If dependent on packet fl=
ow
>> then that=E2=80=99s another interaction with IP to document - and implem=
ent.
>>
>>
>>
>> The update of the the Multi-path routing set is described in section 8.6=
.
>> The expiry timers are removed since -07 based on the comments received. =
One
>> of the reasons is to be consistent with the OLSRv2 routing set, in which=
 no
>> expiry timer is used.
>>
>> Generally speaking, in proactive mode, it follows the same mechanism as
>> OLSRv2: when ever there is a need to update the OLSRv2 routing set, the
>> multi-path routing set is updated.
>>
>> In reactive mode, all the Multi-path routing tuples are removed when the
>> "topology graph" is changed.  The new tuples are recreated "on-demand".
>>
>>
>>
>> CMD> OK, let=E2=80=99s think about that in the reactive case. (Proactive=
 is easy,
>> but it needs to be said, which it isn=E2=80=99t.) You want a set, you ge=
nerate it
>> on demand. There is a change to the Topology Graph. So do you recalculat=
e
>> the set?
>>
>
> No, at this point, we only clear the entire Multi-path Routing Set.
>
>
>> If not then you introduce a stutter, as the packets are flowing and the
>> set disappears and you need to trigger it again.
>>
>
> Yes, it necessary to trigger the calculation again. But the time required
> is trivial, because this is only local: no additional message exchange wi=
th
> other routers is required.
>
>
>> Which means monitoring for that throughout a flow, not just at its start=
.
>>
>
> We don't actually have the concept "flow" in this extension. For each
> datagram, yes, it's necessary to check if a tuple exist or not. There is =
no
> much difference from checking the FIB for IP.
>
>
>> If you do (recalculate the set when the graph changes) how do you know
>> when to stop calculating it? That depends on knowing when the flow stops=
.
>>
>>
> And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more than is required=
 - some changes
>> to the graph would have no effect (for example the increase in metric of=
 a
>> link not being used). But it=E2=80=99s hard to specify.
>>
>
> For the moment, we simply take "the topology graph changes", because even
> links that not used might matters: for example, the decrease in metric of=
 a
> not used metric that introduces a better path.
> It's true that it's possible that it's more than required and could be
> optimised in the future, but considering it's a reactive approach, I
> believe it's acceptable.
>
> On this point (which changes) some sort of permissive wording to indicate
>> that you can avoid making changes when you know they don=E2=80=99t matte=
r is
>> probably right. The when do you stop calculating question is more import=
ant
>> - and needs text discussing it.
>>
>
>>
>>
>> You could when acting reactively forward by usual means in all cases
>> while waiting.
>>
>> The actual packet forwarding by round-robin is an IP process, not this
>> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proce=
ss, why
>> mandate exactly how it=E2=80=99s used?
>>
>>
>>
>> Choosing which path to put in the source routing header is
>> olsrv2-multipath specific, because there are multiple of them. Of course=
,
>> using round-robin is not mandatory -- using other schedulers won't impac=
t
>> the compatibility. Actually, we put it as one of the experiment points a=
lso:
>>
>>
>>
>>
>>
>>
>>
>> * Different path-selection schedulers.  By default, Round-Robin
>> scheduling is used to select a path to be used for datagrams.  In
>> some scenarios, weighted scheduling can be considered: for       example=
,
>> the paths with lower metrics (i.e., higher quality) can       transfer m=
ore
>> datagrams compared to paths with higher metrics.*
>>
>>
>>
>> CMD> This is missing my point. It=E2=80=99s not the round-robin that mat=
ters,
>> it=E2=80=99s that IP needs to do anything. That=E2=80=99s what needs not=
 to be buried.
>> Putting together a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section e=
arly on, perhaps in
>> the applicability section, is needed.
>>
>>
>>
>
> We added the following text in the applicability statement:
>
> *MP-OLSRv2 supports two different, but interoperable multi-path
> calculation approaches: proactive and reactive. In the proactive
> calculation, the paths to all the destinations are calculated before
> needed. In the reactive calculation, only the paths to desired
> destination(s) are calculated on demand. The proactive approach requires
> more computational resources than the reactive one. The reactive approach
> requires the IP forwarding plan to trigger the multi-path calculation.*
>
> *MP-OLSRv2 forwards datagrams using the source routing header. As there
> are multiple paths to each destination, MP-OLSRv2 requires the IP
> forwarding plan to be able to choose which source route to be put in the
> source routing header based on the path scheduler defined by MP-OLSRv2. F=
or
> IPv4 networks, implementation of loose source routing is required followi=
ng
> [RFC0791]. For IPv6 networks, implementation of strict source routing is
> required following [RFC6554].*
>
> As usual, an updated draft is attached, in case needed.
>
> regards
>
> Jiazi
>
>
>
>
> <draft-ietf-manet-olsrv2-multipath.txt>
>
>

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<div dir=3D"ltr">We will add some text to make it more precise.=C2=A0<div><=
br></div><div>best</div><div><br></div><div>Jiazi</div></div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">On Tue, Jun 21, 2016 at 1:02 AM=
, Christopher Dearlove <span dir=3D"ltr">&lt;<a href=3D"mailto:christopher.=
dearlove@gmail.com" target=3D"_blank">christopher.dearlove@gmail.com</a>&gt=
;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div>&q=
uot;Because the encoded blocks are unordered for FEC&quot; is, at best, onl=
y applicable to some FEC methods, it&#39;s definitely not universal.<br><br=
>-- =C2=A0<div>Christopher Dearlove</div></div><div><div class=3D"h5"><div>=
<br>On 20 Jun 2016, at 23:41, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.c=
om" target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<br><br></div><blockqu=
ote type=3D"cite"><div><div dir=3D"ltr">Hi,=C2=A0<br><div class=3D"gmail_ex=
tra"><br><div class=3D"gmail_quote">On Mon, Jun 20, 2016 at 5:56 PM, Dearlo=
ve, Christopher (UK) <span dir=3D"ltr">&lt;<a href=3D"mailto:chris.dearlove=
@baesystems.com" target=3D"_blank">chris.dearlove@baesystems.com</a>&gt;</s=
pan> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-lef=
t-style:solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Comments below.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Short version, still some points I think can=
 be improved. Down to one sticking point, on deciding on how to handle chan=
ges to, and cessation of, the reactive
 set. (Longer text below.) I think this is a real issue. Take a look at wha=
t you do in your implementation - now see if someone could work out to do t=
hat from the text. I don=E2=80=99t think they can.<u></u><u></u></span></p>=
<span>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0</span></p></span></div></div><=
/blockquote><div><br></div><div>we clarified this in the draft. Please chec=
k the our detailed reply below.=C2=A0</div><div><br></div><div>&lt;snip&gt;=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-s=
tyle:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"pur=
ple"><div><div><div><div><div><span><div>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><br>
Page 5, second bullet. How does FEC help with packet re-ordering?<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">Normally, the packets are coded in different &quot;b=
locks&quot; and those blocks are transmitted in different paths. The arrivi=
ng order of those &quot;blocks&quot; is less important.=C2=A0<u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; I still don=E2=80=99t see how=
 it helps with packet re-ordering.</span></p></div></div></div></div></div>=
</div></div></blockquote><div><br></div><div>When FEC is applied, the encod=
er takes one or several packets and produce several coded blocks (denoted b=
lock-1, block-2, ... block-n). Those blocks are forwarded as IP datagrams i=
n the disjoint paths. Because the encoded blocks are unordered for FEC, the=
 arriving order of the encoded blocks of the same packet(s) doesn&#39;t rea=
lly matter.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rg=
b(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB=
" link=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"=
MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;col=
or:rgb(31,73,125)"><u></u><u></u></span></p>
</div><span>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal">Page 6, first paragraph. I still disagree with chara=
cterising as low data rate links. At most the protocol multiplies capacity =
by a small factor, not the orders pf magnitude that link capacities span.<u=
></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We won&#39;t claim that there will be orders of magn=
itude that link capacities span, but it would be beneficial to have aggrega=
ted throughput and load balancing.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">So what do you think of:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">MP-OLSRv2 is designed for networks with dynamic topo=
logy by avoiding single route failure. It can also provide higher aggregate=
d throughput and load balancing, which is beneficial for low data rate link=
s. =C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; Still not convinced by the ph=
rase low data rate links. The issues are ones of load relative to network c=
apacity, and in particular if there are underutilised
 parts of the network. Plus of course a redundancy issue if packets do not =
all need to arrive. These can all occur in high data rate networks as much =
as low data rate ones.<u></u><u></u></span></p>
</div><span>
<div>
<p class=3D"MsoNormal">=C2=A0</p></div></span></div></div></div></div></div=
></div></blockquote><div><br></div><div>It makes sense. I&#39;m OK with rem=
oving the text related to low data rate links.=C2=A0</div><div><br></div><d=
iv>&lt;snip&gt;</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(=
204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" =
link=3D"blue" vlink=3D"purple"><div><div><div><div><div><span><blockquote s=
tyle=3D"border-style:none none none solid;border-left-color:rgb(204,204,204=
);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-ri=
ght:0cm"><p class=3D"MsoNormal">PT_=E2=80=A6 What about hop count? Elsewher=
e in OLSRv2 we record that as well (e.g Routing Set).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">Actually, the number of the items in the array PT_ad=
dress[1...n] already gives the hop count -- is it necessary to repeat the i=
nformation with an additional field? It is not used anyways.=C2=A0<u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; That it=E2=80=99s there could=
 be called out. It gets used in OLSRv2 as a suggested tie-breaker, and some=
 tools might use it. I thought I=E2=80=99d made a comment to say
 what n is, which I don=E2=80=99t see here. This can combine with that</spa=
n></p></div></div></div></div></div></div></div></blockquote><div><br></div=
><div>Yes. we added some text on what &quot;n&quot; is.=C2=A0</div><div>=C2=
=A0</div><div>&lt;snip&gt;</div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,20=
4,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=
=3D"blue" vlink=3D"purple"><div><div><div><div><div><span><blockquote style=
=3D"border-style:none none none solid;border-left-color:rgb(204,204,204);bo=
rder-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:=
0cm"><p class=3D"MsoNormal">
A major omission is discussion of expiry of new Tuples without expiry times=
. If proactive you can (but don=E2=80=99t) discuss when supporting sets cha=
nge.=C2=A0<u></u><u></u></p>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal">If reactive it=E2=80=99s rather a mess (a reason I d=
islike the reactive mechanism). When to discard? When to recreate? If depen=
dent on packet flow then that=E2=80=99s another interaction with IP to docu=
ment - and implement.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The update of the the Multi-path routing set is desc=
ribed in section 8.6. The expiry timers are removed since -07 based on the =
comments received. One of the reasons is to be consistent with the OLSRv2 r=
outing set, in which no expiry timer
 is used.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Generally speaking, in proactive mode, it follows th=
e same mechanism as OLSRv2: when ever there is a need to update the OLSRv2 =
routing set, the multi-path routing set is updated.=C2=A0<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">In reactive mode, all the Multi-path routing tuples =
are removed when the &quot;topology graph&quot; is changed.=C2=A0 The new t=
uples are recreated &quot;on-demand&quot;.=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Cal=
ibri,sans-serif;color:rgb(31,73,125)">CMD&gt; OK, let=E2=80=99s think about=
 that in the reactive case. (Proactive is easy, but it needs to be said, wh=
ich it isn=E2=80=99t.) You want a set, you generate it on demand.
 There is a change to the Topology Graph. So do you recalculate the set? </=
span></p></div></div></div></div></div></div></div></blockquote><div><br></=
div><div>No, at this point, we only clear the entire Multi-path Routing Set=
.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,=
204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"=
blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"=
><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,=
73,125)">If not then you introduce a stutter, as the packets are flowing an=
d the set disappears and you need to trigger it again. </span></p></div></d=
iv></div></div></div></div></div></blockquote><div><br></div><div>Yes, it n=
ecessary to trigger the calculation again. But the time required is trivial=
, because this is only local: no additional message exchange with other rou=
ters is required.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-co=
lor:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D=
"EN-GB" link=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-ser=
if;color:rgb(31,73,125)">Which means monitoring for that throughout a flow,=
 not just at
 its start. </span></p></div></div></div></div></div></div></div></blockquo=
te><div><br></div><div>We don&#39;t actually have the concept &quot;flow&qu=
ot; in this extension. For each datagram, yes, it&#39;s necessary to check =
if a tuple exist or not. There is no much difference from checking the FIB =
for IP.=C2=A0</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(20=
4,204,204);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" li=
nk=3D"blue" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:r=
gb(31,73,125)">If you do (recalculate the set when the graph changes) how d=
o you know when to stop calculating it? That depends on knowing when the fl=
ow stops.</span>=C2=A0</p></div></div></div></div></div></div></div></block=
quote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:s=
olid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"><=
div><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> And =E2=80=9Ct=
he Topology Graph changes=E2=80=9D is more than is required - some changes =
to the graph would have no
 effect (for example the increase in metric of a link not being used). But =
it=E2=80=99s hard to specify. </span></p></div></div></div></div></div></di=
v></div></blockquote><div><br></div><div>For the moment, we simply take &qu=
ot;the topology graph changes&quot;, because even links that not used might=
 matters: for example, the decrease in metric of a not used metric that int=
roduces a better path. =C2=A0</div><div>It&#39;s true that it&#39;s possibl=
e that it&#39;s more than required and could be optimised in the future, bu=
t considering it&#39;s a reactive approach, I believe it&#39;s acceptable.=
=C2=A0</div><div><br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204=
);border-left-style:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blu=
e" vlink=3D"purple"><div><div><div><div><div><div><p class=3D"MsoNormal"><s=
pan style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,=
125)">On this point (which changes) some sort of permissive wording to indi=
cate that you can avoid making changes when you know they don=E2=80=99t mat=
ter is probably right. The
 when do you stop calculating question is more important - and needs text d=
iscussing it.</span>=C2=A0</p></div></div></div></div></div></div></div></b=
lockquote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-sty=
le:solid;padding-left:1ex"><div lang=3D"EN-GB" link=3D"blue" vlink=3D"purpl=
e"><div><div><div><div><div><div><p class=3D"MsoNormal"><span style=3D"font=
-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u><=
/u></span></p>
</div><span>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Choosing which path to put in the source routing hea=
der is olsrv2-multipath specific, because there are multiple of them. Of co=
urse, using round-robin is not mandatory -- using other schedulers won&#39;=
t impact the compatibility. Actually,
 we put it as one of the experiment points also:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.=
8pt;margin-right:0cm">
<p class=3D"MsoNormal"><i>=C2=A0Different path-selection schedulers.=C2=A0 =
By default, Round-Robin<br>
=C2=A0 =C2=A0 =C2=A0 scheduling is used to select a path to be used for dat=
agrams.=C2=A0 In<br>
=C2=A0 =C2=A0 =C2=A0 some scenarios, weighted scheduling can be considered:=
 for<br>
=C2=A0 =C2=A0 =C2=A0 example, the paths with lower metrics (i.e., higher qu=
ality) can<br>
=C2=A0 =C2=A0 =C2=A0 transfer more datagrams compared to paths with higher =
metrics.</i><u></u><u></u></p>
</blockquote>
</div>
</span><div>
<p class=3D"MsoNormal">=C2=A0<span style=3D"color:rgb(31,73,125)"><u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; This is missing my point. It=E2=80=
=99s not the round-robin that matters, it=E2=80=99s that IP needs to do any=
thing. That=E2=80=99s what needs not to be buried. Putting together
 a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section early on, perhaps in=
 the applicability section, is needed.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0</span></p></div></div></div></=
div></div></div></div></blockquote><div><br></div><div>We added the followi=
ng text in the applicability statement:</div><div><br></div><div><div><i>MP=
-OLSRv2 supports two different, but interoperable multi-path calculation ap=
proaches: proactive and reactive. In the proactive calculation, the paths t=
o all the destinations are calculated before needed. In the reactive calcul=
ation, only the paths to desired destination(s) are calculated on demand. T=
he proactive approach requires more computational resources than the reacti=
ve one. The reactive approach requires the IP forwarding plan to trigger th=
e multi-path calculation.</i></div><div><i><br></i></div><div><i>MP-OLSRv2 =
forwards datagrams using the source routing header. As there are multiple p=
aths to each destination, MP-OLSRv2 requires the IP forwarding plan to be a=
ble to choose which source route to be put in the source routing header bas=
ed on the path scheduler defined by MP-OLSRv2. For IPv4 networks, implement=
ation of loose source routing is required following [RFC0791]. For IPv6 net=
works, implementation of strict source routing is required following [RFC65=
54].</i></div></div><div><br></div><div>As usual, an updated draft is attac=
hed, in case needed.=C2=A0</div><div><br></div><div>regards</div><div><br><=
/div><div>Jiazi</div><div><br></div><div><br></div><div>=C2=A0</div></div><=
/div></div>
</div></blockquote></div></div><blockquote type=3D"cite"><div>&lt;draft-iet=
f-manet-olsrv2-multipath.txt&gt;</div></blockquote></div></blockquote></div=
><br></div>

--001a1142c52e44e0610535d06f15--


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Hi,

    Please excuse me if we already covered this ground and have
forgotten the answers.  I have two questions on DLEP:

1) How does a router correlate a received Destination Announce Response
Message (sent by a modem) to its Destination Announce Message? 

- A possible answer is it, doesn't; but then why have a Status data item?

2) Shouldn't a Destination Announce Response Message include the same
optional parameters as a Destination Up message? (Notably absent are IP
addresses and subnets).

- If omission is intentional, how does router provide reachable address
and prefix information? (A required subsequent Update? - yuch!)

Thanks,

Lou




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From: "Ratliff, Stanley" <sratliff@idirect.net>
To: Lou Berger <lberger@labn.net>, "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, MANET IETF <manet@ietf.org>
Thread-Topic: DLEP question
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Date: Tue, 21 Jun 2016 23:55:46 +0000
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To: "Ratliff, Stanley" <sratliff@idirect.net>, "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, MANET IETF <manet@ietf.org>
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From: Lou Berger <lberger@labn.net>
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Date: Tue, 21 Jun 2016 20:26:22 -0400
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Subject: Re: [manet] DLEP question
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Hi Stan,

Thanks for the quick response.


On 6/21/2016 7:55 PM, Ratliff, Stanley wrote:
> Lou, 
>
> 1. The request/response is correlated, since only 1 transaction can be outstanding (the transaction model fixes it for us). 
umm, the doc says:

   Only one request per
   destination may be in progress at a time per session.

As a Destination Announce Message relates to a single destination, can't
an implementation send multiple of these in parallel?  If not, where
does the document say this?

>
> 2.  The Announce message does include IPv4 and IPv6 Address data items (Section 9.13, 5th paragraph). You are correct that the Dest Announce doesn't currently include the IPv4/IPv6 Attached Subnet data items.
My question what the router sends, i.e., the Destination Announce
Response Message.

>  TBH, I don't remember if that was intentional or not - I know the discussion went on for a long time about whether the attached subnet TLVs effectively made DLEP a routing protocol. IIRC, because of that, there were iterations where the Attached Subnet items were included, and ones where it was removed. I just don't remember where we finally landed. As for allowing other data items on Destination Announce (like the same data items that are on Destination Up/Destination Update), the rationale was that allowing a router to send metrics *to* the modem didn't make a whole lot of sense - no one was sure what the modem would do with those metrics. 

Again, I'm asking about what the modem sends the router and the
difference in the information provided based on which initiates the
"destination".  In modem initiated, the up includes IP address & prefix,
plus metrics; while in the Destination Announce Response Message only
metrics are provided -- yet the same action is expected, i.e.,:

   the router should add knowledge of the available destination to its
   information base.


If the same action is expected for the Up and the response, shouldn't
the same info be available?

Thanks,

Lou

PS If so, this is a minor doc fix IMO...

>
> Regards,
> Stan
>
>
>> -----Original Message-----
>> From: Lou Berger [mailto:lberger@labn.net]
>> Sent: Tuesday, June 21, 2016 6:47 PM
>> To: draft-ietf-manet-dlep@ietf.org; MANET IETF <manet@ietf.org>
>> Subject: DLEP question
>>
>>
>> Hi,
>>
>>     Please excuse me if we already covered this ground and have forgotten
>> the answers.  I have two questions on DLEP:
>>
>> 1) How does a router correlate a received Destination Announce Response
>> Message (sent by a modem) to its Destination Announce Message?
>>
>> - A possible answer is it, doesn't; but then why have a Status data item?
>>
>> 2) Shouldn't a Destination Announce Response Message include the same
>> optional parameters as a Destination Up message? (Notably absent are IP
>> addresses and subnets).
>>
>> - If omission is intentional, how does router provide reachable address and
>> prefix information? (A required subsequent Update? - yuch!)
>>
>> Thanks,
>>
>> Lou
>>
>>
>>
>
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From: "Ratliff, Stanley" <sratliff@idirect.net>
To: Lou Berger <lberger@labn.net>, "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, MANET IETF <manet@ietf.org>
Thread-Topic: DLEP question
Thread-Index: AQHRzA7Nwoeuk5LAXEuopotE78FYX5/0lMGwgABPlwD//73KwA==
Date: Wed, 22 Jun 2016 00:35:07 +0000
Message-ID: <25f3b91480d64425b4ec774506208029@VAUSDITCHM2.idirect.net>
References: <cd6da0ee-3766-4b25-4097-925ec49c8314@labn.net> <3ca9ff337d414c9499cb7c0e34867971@VAUSDITCHM2.idirect.net> <dd96d3d9-e874-dab9-3849-200ec855f9f3@labn.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/CX8eDVaceAJlMUBM85vk6H2zvhE>
Subject: Re: [manet] DLEP question
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From: Lou Berger <lberger@labn.net>
To: "Ratliff, Stanley" <sratliff@idirect.net>, <draft-ietf-manet-dlep@ietf.org>, MANET IETF <manet@ietf.org>
Date: Tue, 21 Jun 2016 21:43:46 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/gvgB8fnbh_TLe7S7K2G3VRTOJtg>
Subject: Re: [manet] DLEP question
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Stan,


On June 21, 2016 8:35:34 PM "Ratliff, Stanley" <sratliff@idirect.net> wrote:

>
>
>> -----Original Message-----
>> From: Lou Berger [mailto:lberger@labn.net]
>> Sent: Tuesday, June 21, 2016 8:26 PM
>> To: Ratliff, Stanley <sratliff@idirect.net>; draft-ietf-manet-dlep@ietf.org;
>> MANET IETF <manet@ietf.org>
>> Subject: Re: DLEP question
>>
>> Hi Stan,
>>
>> Thanks for the quick response.
>>
>>
>> On 6/21/2016 7:55 PM, Ratliff, Stanley wrote:
>> > Lou,
>> >
>> > 1. The request/response is correlated, since only 1 transaction can be
>> outstanding (the transaction model fixes it for us).
>> umm, the doc says:
>>
>>    Only one request per
>>    destination may be in progress at a time per session.
>>
>> As a Destination Announce Message relates to a single destination, can't an
>> implementation send multiple of these in parallel?  If not, where does the
>> document say this?
>
> Fair point. The doc isn't clear on that topic.
>
>>
>> >
>> > 2.  The Announce message does include IPv4 and IPv6 Address data items
>> (Section 9.13, 5th paragraph). You are correct that the Dest Announce
>> doesn't currently include the IPv4/IPv6 Attached Subnet data items.
>> My question what the router sends, i.e., the Destination Announce
>> Response Message.
>>
>> >  TBH, I don't remember if that was intentional or not - I know the discussion
>> went on for a long time about whether the attached subnet TLVs effectively
>> made DLEP a routing protocol. IIRC, because of that, there were iterations
>> where the Attached Subnet items were included, and ones where it was
>> removed. I just don't remember where we finally landed. As for allowing
>> other data items on Destination Announce (like the same data items that are
>> on Destination Up/Destination Update), the rationale was that allowing a
>> router to send metrics *to* the modem didn't make a whole lot of sense - no
>> one was sure what the modem would do with those metrics.
>>
>> Again, I'm asking about what the modem sends the router and the
>> difference in the information provided based on which initiates the
>> "destination".  In modem initiated, the up includes IP address & prefix, plus
>> metrics; while in the Destination Announce Response Message only metrics
>> are provided -- yet the same action is expected, i.e.,:
>>
>>    the router should add knowledge of the available destination to its
>>    information base.
>>
>>
>> If the same action is expected for the Up and the response, shouldn't the
>> same info be available?
>
> Ahh, I understand now. Yes, I agree - metrics should be allowed on the 
> response. I'm still not clear on the Attached Subnet TLVs - if a router 
> says "I found the following destination", does it make sense for the modem 
> to respond "Yeah, and I've got the following subnets attached to it"? What 
> would a router do with a Destination Announce Response that has subnet info 
> attached to it?
>

Perhaps a misunderstanding the intent  of the message, but I see the 
destination announce message as basically a query to trigger an up message. 
So I think a router would do the same thing that it does when it receives 
an up with a subnet. Am I missing something?

Lou
> Regards,
> Stan
>
>
>
>>
>> Thanks,
>>
>> Lou
>>
>> PS If so, this is a minor doc fix IMO...
>>
>> >
>> > Regards,
>> > Stan
>> >
>> >
>> >> -----Original Message-----
>> >> From: Lou Berger [mailto:lberger@labn.net]
>> >> Sent: Tuesday, June 21, 2016 6:47 PM
>> >> To: draft-ietf-manet-dlep@ietf.org; MANET IETF <manet@ietf.org>
>> >> Subject: DLEP question
>> >>
>> >>
>> >> Hi,
>> >>
>> >>     Please excuse me if we already covered this ground and have
>> >> forgotten the answers.  I have two questions on DLEP:
>> >>
>> >> 1) How does a router correlate a received Destination Announce
>> >> Response Message (sent by a modem) to its Destination Announce
>> Message?
>> >>
>> >> - A possible answer is it, doesn't; but then why have a Status data item?
>> >>
>> >> 2) Shouldn't a Destination Announce Response Message include the same
>> >> optional parameters as a Destination Up message? (Notably absent are
>> >> IP addresses and subnets).
>> >>
>> >> - If omission is intentional, how does router provide reachable
>> >> address and prefix information? (A required subsequent Update? -
>> >> yuch!)
>> >>
>> >> Thanks,
>> >>
>> >> Lou
>> >>
>> >>
>> >>
>> >
>> > _____________________________________________________
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>
>
> _____________________________________________________
> This electronic message and any files transmitted with it contains
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From: Henning Rogge <hrogge@gmail.com>
Date: Wed, 22 Jun 2016 06:21:10 +0200
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Cc: MANET IETF <manet@ietf.org>, "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>
Subject: Re: [manet] DLEP question
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On Wed, Jun 22, 2016 at 1:55 AM, Ratliff, Stanley <sratliff@idirect.net> wrote:
> Lou,
>
> 1. The request/response is correlated, since only 1 transaction can be outstanding (the transaction model fixes it for us).

Wouldn't the ORDER or arrivals for the answers be enough to correlate
them, even with multiple in flight? That is why we switched to TCP
(reliable transport), so we can have multiple messages in flight.

Henning Rogge


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From: Rick Taylor <rick@tropicalstormsoftware.com>
To: "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, "manet@ietf.org" <manet@ietf.org>, "sratliff@idirect.net" <sratliff@idirect.net>, "lberger@labn.net" <lberger@labn.net>
Thread-Topic: [manet] DLEP question
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From nobody Wed Jun 22 04:36:45 2016
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From: Lou Berger <lberger@labn.net>
To: Rick Taylor <rick@tropicalstormsoftware.com>, draft-ietf-manet-dlep@ietf.org, manet@ietf.org, sratliff@idirect.net
References: <cd6da0ee-3766-4b25-4097-925ec49c8314@labn.net> <3ca9ff337d414c9499cb7c0e34867971@VAUSDITCHM2.idirect.net> <dd96d3d9-e874-dab9-3849-200ec855f9f3@labn.net> <25f3b91480d64425b4ec774506208029@VAUSDITCHM2.idirect.net> <1466586684.28636.15.camel@tropicalstormsoftware.com>
Message-ID: <725f8efa-993f-e1d8-39ff-2e722294b63b@labn.net>
Date: Wed, 22 Jun 2016 07:36:17 -0400
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Subject: Re: [manet] DLEP question
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Hi Rick,

Wrt question 1 - correlation of a router sent announce and the modem
sent response, I missed the mac address in the announce (consistent
formatting wrt data items or bnf would have made it more obvious) --
this answers both the correlation and transaction model questions.  So
no change needed here.

See below for question 2

On June 22, 2016 5:12:43 AM Rick Taylor <rick@tropicalstormsoftware.com>
wrote:

> Hi Lou,
>
> Due to time-zones, I'll add some late comments myself, inline..
>

Hardly late - and certainly helpful.

> On Wed, 2016-06-22 at 00:35 +0000, Ratliff, Stanley wrote:
>>
>> >
>> > -----Original Message-----
>> > From: Lou Berger [mailto:lberger@labn.net]
>> > Sent: Tuesday, June 21, 2016 8:26 PM
>> > To: Ratliff, Stanley <sratliff@idirect.net>; draft-ietf-manet-dlep@
>> > ietf.org;
>> > MANET IETF <manet@ietf.org>
>> > Subject: Re: DLEP question
>> >
>> > Hi Stan,
>> >
>> > Thanks for the quick response.
>> >
>> >
>> > On 6/21/2016 7:55 PM, Ratliff, Stanley wrote:
>> > >
>> > >
.....

>> > > 2.  The Announce message does include IPv4 and IPv6 Address data
>> > > items
>> > (Section 9.13, 5th paragraph). You are correct that the Dest
>> > Announce
>> > doesn't currently include the IPv4/IPv6 Attached Subnet data items.
>> > My question what the router sends, i.e., the Destination Announce
>> > Response Message.
>...
>
>
>> > >
>> > >  TBH, I don't remember if that was intentional or not - I know
>> > > the discussion
>> > went on for a long time about whether the attached subnet TLVs
>> > effectively
>> > made DLEP a routing protocol. IIRC, because of that, there were
>> > iterations
>> > where the Attached Subnet items were included, and ones where it
>> > was
>> > removed. I just don't remember where we finally landed. As for
>> > allowing
>> > other data items on Destination Announce (like the same data items
>> > that are
>> > on Destination Up/Destination Update), the rationale was that
>> > allowing a
>> > router to send metrics *to* the modem didn't make a whole lot of
>> > sense - no
>> > one was sure what the modem would do with those metrics.
>
> It wasn't clear to me at the time of writing that attached subnets made
> any sense in the use-case of multicast that Announce was designed to
> solve, but I can see no harm in allowing them (as a "MAY contain...")
> in the response message.
>

While announce may have been targeted at multicast originally, and this
is covered in the 1st paragraph in section 9.13, it also supports the
case where a router previously nacked an Up and is now interested in
hearing about that mac:

   A Destination Announce Message MAY also be sent by a router to
   request information concerning a destination in which it has
   previously declined interest, via the 1 'Not Interested' status code
   in a Destination Up Response Message (Section 9.12), see Table 4, or
   declared as 'down', via the Destination Down Message (Section 9.15).

It's in this case that it would seem that the router would need to hear
the same information as is in the Up message.

>> >
>> > Again, I'm asking about what the modem sends the router and the
>> > difference in the information provided based on which initiates the
>> > "destination".  In modem initiated, the up includes IP address &
>> > prefix, plus
>> > metrics; while in the Destination Announce Response Message only
>> > metrics
>> > are provided -- yet the same action is expected, i.e.,:
>> >
>> >    the router should add knowledge of the available destination to
>> > its
>> >    information base.
>
> It's the difference between the modem discovering a unicast neighbour =
> Dest_Up; and the router discovering the need (IGMP snooping) for
> metrics to a logical (multicast/broadcast) destination =
> Dest_Announce. 
>
> Because of the different use-cases the message contents are different,
> hence the different messages.  
>

Right, the problem is that both use cases are now supported by announce,
and in the second the information is incomplete.

> The 'knowledge' mentioned in the text is the link metrics and
> availability status.
>
>> >
>> >
>> > If the same action is expected for the Up and the response,
>> > shouldn't the
>> > same info be available?
>
> No, different use-case.  Each party already has different partial
> information, so only the missing information needs to be exchanged.
>
>> Ahh, I understand now. Yes, I agree - metrics should be allowed on
>> the response. I'm still not clear on the Attached Subnet TLVs - if a
>> router says "I found the following destination", does it make sense
>> for the modem to respond "Yeah, and I've got the following subnets
>> attached to it"? What would a router do with a Destination Announce
>> Response that has subnet info attached to it?
>
> Metrics are already allowed on the response (Sec 9.14).  See above for
> my comments on attached subnets.
>
> The Status data item is in the Announce Response so the modem has some
> way to say "No, I don't do multicast" or suchlike.
>

I think this is addressed above too.

> Hope that helps?

Yes.  Thank you.
Lou

>
> Rick
>
>
>
>>
>> Regards,
>> Stan
>>
>>
>>
>> >
>> >
>> > Thanks,
>> >
>> > Lou
>> >
>> > PS If so, this is a minor doc fix IMO...
>> >
>> > >
>> > >
>> > > Regards,
>> > > Stan
>> > >
>> > >
>> > > >
>> > > > -----Original Message-----
>> > > > From: Lou Berger [mailto:lberger@labn.net]
>> > > > Sent: Tuesday, June 21, 2016 6:47 PM
>> > > > To: draft-ietf-manet-dlep@ietf.org; MANET IETF <manet@ietf.org>
>> > > > Subject: DLEP question
>> > > >
>> > > >
>> > > > Hi,
>> > > >
>> > > >     Please excuse me if we already covered this ground and have
>> > > > forgotten the answers.  I have two questions on DLEP:
>> > > >
>> > > > 1) How does a router correlate a received Destination Announce
>> > > > Response Message (sent by a modem) to its Destination Announce
>> > Message?
>> > >
>> > > >
>> > > >
>> > > > - A possible answer is it, doesn't; but then why have a Status
>> > > > data item?
>> > > >
>> > > > 2) Shouldn't a Destination Announce Response Message include
>> > > > the same
>> > > > optional parameters as a Destination Up message? (Notably
>> > > > absent are
>> > > > IP addresses and subnets).
>> > > >
>> > > > - If omission is intentional, how does router provide reachable
>> > > > address and prefix information? (A required subsequent Update?
>> > > > -
>> > > > yuch!)
>> > > >
>> > > > Thanks,
>> > > >
>> > > > Lou
>> > > >
>> > > >
>> > > >
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From: Rick Taylor <rick@tropicalstormsoftware.com>
To: "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, "manet@ietf.org" <manet@ietf.org>, "sratliff@idirect.net" <sratliff@idirect.net>, "lberger@labn.net" <lberger@labn.net>
Thread-Topic: [manet] DLEP question
Thread-Index: AQHRzGYomCZFzPj0W0eRWhFX+szX4Z/1SwSAgAAiEYA=
Date: Wed, 22 Jun 2016 13:38:13 +0000
Message-ID: <1466602693.28636.41.camel@tropicalstormsoftware.com>
References: <cd6da0ee-3766-4b25-4097-925ec49c8314@labn.net> <3ca9ff337d414c9499cb7c0e34867971@VAUSDITCHM2.idirect.net> <dd96d3d9-e874-dab9-3849-200ec855f9f3@labn.net> <25f3b91480d64425b4ec774506208029@VAUSDITCHM2.idirect.net> <1466586684.28636.15.camel@tropicalstormsoftware.com> <725f8efa-993f-e1d8-39ff-2e722294b63b@labn.net>
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Subject: [manet] Last call on OLSRv2 Sec Threats still open
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There was a mixup.  Last Call for OLSRv2-Sec-Threats document is still open
and will end on July 1st.  I'll take this opportunity to again remind
people to please read and comment to the list.

Justin

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<div dir=3D"ltr">There was a mixup.=C2=A0 Last Call for OLSRv2-Sec-Threats =
document is still open and will end on July 1st.=C2=A0 I&#39;ll take this o=
pportunity to again remind people to please read and comment to the list.<b=
r><br>Justin</div>

--001a114e5d28339c090535de4ee6--


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To: Rick Taylor <rick@tropicalstormsoftware.com>, "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, "manet@ietf.org" <manet@ietf.org>, "sratliff@idirect.net" <sratliff@idirect.net>
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From: Lou Berger <lberger@labn.net>
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Subject: Re: [manet] DLEP question
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Rick,

see below.

On 6/22/2016 9:38 AM, Rick Taylor wrote:
> ...
>>>>>> 2.  The Announce message does include IPv4 and IPv6 Address
>>>>>> data
>>>>>> items
>>>>> (Section 9.13, 5th paragraph). You are correct that the Dest
>>>>> Announce
>>>>> doesn't currently include the IPv4/IPv6 Attached Subnet data
>>>>> items.
>>>>> My question what the router sends, i.e., the Destination
>>>>> Announce
>>>>> Response Message.
>>> ...
>>>
>>>
>>>>>>
>>>>>>  TBH, I don't remember if that was intentional or not - I
>>>>>> know
>>>>>> the discussion
>>>>> went on for a long time about whether the attached subnet TLVs
>>>>> effectively
>>>>> made DLEP a routing protocol. IIRC, because of that, there were
>>>>> iterations
>>>>> where the Attached Subnet items were included, and ones where
>>>>> it
>>>>> was
>>>>> removed. I just don't remember where we finally landed. As for
>>>>> allowing
>>>>> other data items on Destination Announce (like the same data
>>>>> items
>>>>> that are
>>>>> on Destination Up/Destination Update), the rationale was that
>>>>> allowing a
>>>>> router to send metrics *to* the modem didn't make a whole lot
>>>>> of
>>>>> sense - no
>>>>> one was sure what the modem would do with those metrics.
>>> It wasn't clear to me at the time of writing that attached subnets
>>> made
>>> any sense in the use-case of multicast that Announce was designed
>>> to
>>> solve, but I can see no harm in allowing them (as a "MAY
>>> contain...")
>>> in the response message.
>>>
>> While announce may have been targeted at multicast originally, and
>> this
>> is covered in the 1st paragraph in section 9.13, it also supports the
>> case where a router previously nacked an Up and is now interested in
>> hearing about that mac:
>>
>>    A Destination Announce Message MAY also be sent by a router to
>>    request information concerning a destination in which it has
>>    previously declined interest, via the 1 'Not Interested' status
>> code
>>    in a Destination Up Response Message (Section 9.12), see Table 4,
>> or
>>    declared as 'down', via the Destination Down Message (Section
>> 9.15).
>>
>> It's in this case that it would seem that the router would need to
>> hear
>> the same information as is in the Up message.
> I disagree, if the router is using Destination Announce to request the
> resumption of Destination Updates concerning a Destination it *already*
> knows about, we decided it was best to only provide the mutable (link)
> information in the response.  
this works for IP addresses, but not subnets -- as I read the spec.

> However, comparing Destination Announce Response with the Destination
> Update message, it could be argued IP address is mutable; but I suggest
> that in the (expected to be unlikely) case that a Destination has
> changed IP addresses (and remained up) between a router sending a 'shut
> up' Destination Down and a later 'resume' Destination Announce, an
> extra Destination Update is all it takes to update the router, and this
> applies to Attached Subnets as well.
this means that you assume a router maintains state for a destination it
is *not* tracking????  This isn't stated in the spec, nor do I think it
is particularly obvious.

> I think we may be arguing over two different ways of providing the same
> functionality,
I agree, but read the spec as saying that an announce response needs to
be followed by the modem sending a destination update to provide the
latest IP information.  This should be clarified IMO, or the requirement
for a router to store state even for destinations which it rejects --
but honestly think this makes little sense.

>  and I believe Stan and I are both in the "many small
> messages with few options" camp, rather than the "one big message with
> all options" camp.

Sure, but in this case I personally would have just had a destination
announce trigger a destination up...


>>>>>
>>>>> Again, I'm asking about what the modem sends the router and the
>>>>> difference in the information provided based on which initiates
>>>>> the
>>>>> "destination".  In modem initiated, the up includes IP address
>>>>> &
>>>>> prefix, plus
>>>>> metrics; while in the Destination Announce Response Message
>>>>> only
>>>>> metrics
>>>>> are provided -- yet the same action is expected, i.e.,:
>>>>>
>>>>>    the router should add knowledge of the available destination
>>>>> to
>>>>> its
>>>>>    information base.
>>> It's the difference between the modem discovering a unicast
>>> neighbour =
>>> Dest_Up; and the router discovering the need (IGMP snooping) for
>>> metrics to a logical (multicast/broadcast) destination =
>>> Dest_Announce. 
>>>
>>> Because of the different use-cases the message contents are
>>> different,
>>> hence the different messages.  
>>>
>> Right, the problem is that both use cases are now supported by
>> announce,
>> and in the second the information is incomplete.
> No, sorry, I disagree, they are different use-cases.

I'm sorry, I just don't see how IP addresses and subnets are covered in
the 'now interested' case based on the current document.  I think there
is at a minimum some (minor) clarifications / changes to the doc to
clear this up, which should be doable before the next step, i.e., IETF
last call.

Thanks,
Lou
 


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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>, "draft-ietf-manet-credit-window@ietf.org" <draft-ietf-manet-credit-window@ietf.org>
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Termination is, unless a late change that I've missed was made, a standard =
DLEP behaviour. So if there's an issue, it's probably a general DLEP issue =
rather than just a credit window issue.

That said, I think the DLEP security model is to assume that there won't be=
 anything injected on a dedicated radio (*) to router link. I don't recall =
how clearly that's said in the DLEP draft. But if that is accepted from DLE=
P, I don't think it's new to credit window (though a reference could be mad=
e to that).

(*) DLEP uses modem. I continue to think radio, while not ideal, is a bette=
r word. This is supported by that some non-IETF work I'm aware of (and the =
authors are aware of) that discussed DLEP translated modem to radio to pres=
ent to a customer community (even in quotations from the draft). However th=
at view didn't gain traction in this WG.

--
Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com<mailto:chris.de=
arlove@baesystems.com>

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai<http://www.baesystems.com/ai>
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Alvaro Retana (are=
tana)
Sent: 21 June 2016 19:38
To: draft-ietf-manet-credit-window@ietf.org
Cc: manet@ietf.org; manet-chairs@ietf.org
Subject: [manet] AD Review of draft-ietf-manet-credit-window-04

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Stan:

Hi!  How are you?

I just finished reading this document.  First of all, thanks for taking thi=
s work on!

Please see my comments below.  I think many of the comments (even the Major=
 ones) should be easy to address.  However, I am specially concerned about =
the actions (terminate) to be taken in some of the cases - which, I think, =
make DLEP vulnerable.

After you address the Major comments and provide a revised ID, I will want =
to get a review from the Transport Area, probably in parallel with the IETF=
 Last Call (depending on where we are with the DLEP document).

Thanks!

Alvaro.


Major:

M1. "Credit Use Rejected" Status.  When should this Status be used?  I'm gu=
essing that maybe windowing is not supported (the router understands the fe=
ature, but doesn't support it) -- what else?  I suspect that it is up to th=
e receiver to use this status as it sees fit, is that the intent?  If so, p=
lease clearly say so.  Are there any well-known reasons that might be benef=
icial to mention?


M2. Both Sections 8.1. (DLEP Destination Up Message) and 8.2. (DLEP Destina=
tion Announce Message) say that "MUST use the value in Credit Grant as the =
initial value...".  But given that the credit use can be rejected, the "MUS=
T" is misleading.  s/MUST/SHOULD or clarify "...if accepted..."


M3. It is not a requirement that Credit Windows be always implemented in bo=
th directions, right?

M3.1. Sections 5. (Operation), 8.3. (DLEP Destination Up Response Message) =
and 8.4. (DLEP Destination Announce Response Message) all say that after re=
ceiving a Credit Grant data item "the receiver MUST respond...with a respon=
se message that contains a Credit Grant data item".  However, Section 9.1. =
(Credit Grant) says that "the receiver MUST respond with a message containi=
ng a Credit Window Status data item", which seems to be the right thing.

M3.2. It seems to me that (in 8.3 and 8.4) this text should also talk about=
 the Credit Window Status data item:
M3.2.1. (in the response): "...if the corresponding...message did not conta=
in a Credit Grant...Response message MUST NOT contain a Credit Grant (Secti=
on 9.1) data item".
M3.2.2. "receiver of...Response MUST use the received Credit Grant value to=
 initialize...".

M3.3. Related to this point, Section 9.1. (Credit Grant) says that the "Cre=
dit Grant data item MAY appear in the DLEP Destination Up, Destination Anno=
unce, and Destination Update messages."  No  response messages are listed, =
which is ok.  I would suggest you stress that those are the only messages w=
hich can contain the data item.  Either s/MAY/MAY only, or (even better) s/=
MAY/MUST only   [I think the "MUST" is ok because the Operation section alr=
eady talks about not every destination needing credit windowing.]


M4. Credit Window Out of Sync status code.  Both 8.3 and 8.4 say that if a =
peer "detects a mismatch in the presence or absence of credit window data i=
tems...MUST terminate the session".

M4.1. Section 7. (DLEP Status Codes for Credit-Window Extension) says lists=
 the failure mode as "Continue".  Please correct that and make sure that th=
e registration request explicitly tells IANA which range to assign the stat=
us codes from.

M4.2. It seems to me that using a "terminate" failure mode may be overkill.=
  It also seems to me that it would be straight forward to require a Credit=
 Grant data item to be sent after receiving this status code and let the se=
ssion resync on its own (or send a Credit Grant if the lack of sync is dete=
cted locally) - it looks like the potential impact of resetting the session=
 may not be justified for a single stream.  I note in the DLEP spec that ev=
en refusing to do something (Request Denied) has a failure mode of Continue.


M5. Section 9.2. (Credit Window Status) says that if the "local credit coun=
ts are not synchronized...MAY either...or o Issue a DLEP Destination Down m=
essage, to clear credit counts on the session."

M5.1. [nit] was this intended to be a bulleted list?

M5.2. The "MAY" indicates that both actions are optional.  IOW, it says tha=
t neither action has to be performed.  If that is so, then how do we get th=
e session back in sync?

M5.3. That second option (Destination Down) could also result in the routin=
g protocol (or anyone else listening to DLEP) to reset their adjacency.  As=
 I mentioned above, this action seems to be too drastic because of the effe=
ct.  Or am I missing something?

M5.4. Going back to the "MAY either" part.  When (Why) would an implementat=
ion chose not to use the least intrusive option?

M5.5. Given the potential problems with falling out to sync, why is this se=
ction not more prescriptive: "It is recommended that implementations issue =
a DLEP Destination Update with a Credit Window Status data item at a config=
urable multiple of the DLEP Heartbeat timer..."  Maybe s/recommended/RECOMM=
ENDED


M6. Section 9.3. (Credit Request)

M6.1. "If the corresponding...message for this session did not contain a Cr=
edit Grant data item...then receipt of the Credit Request data item MUST be=
 considered as an error by the receiver, requiring termination of the DLEP =
peer session."  Same comment as before; very disruptive!

M6.2. There's no guidance as to what should be done when receiving a Credit=
 Request.


M7. Section 10. (Security Considerations)

M7.1. "The extension does not introduce any additional threats above those =
documented in [DLEP]."  I disagree.  The extra opportunities to reset the D=
LEP session create a potential DoS attack: a peer can (for example) send a =
Credit Request for any destination not using credits and the whole session =
is reset, potentially affecting other flows.

M7.2. "The mitigation strategy documented in that document is sufficient to=
 secure operation of this extension."  Neither "mitigation" nor "strategy" =
show up in the DLEP document - you'll have to be more specific.



Minor:

p1. For ease of tracking, please number the TBD values (for example TBD1, T=
BD2, etc.) throughout the document to match the requests to IANA.

p2. Section 6 is superfluous, please delete it.

p3. "Descriptions of the data items are included below."  Please put a refe=
rence.

p4. The format in Section 9.1. (Credit Grant) shows two "Credit Increment" =
fields.  From the explanation which indicates a "64-bit quantity), I'm assu=
ming that these are really not 2 independent fields, but one big (64-bits) =
"Credit Increment" field.  Please fix the figure.
P4.1. The MRW/RRW in the figure in Section 9.2 have the same problem.

p5. I don't think the reference to RFC5578 is needed.  Pointing to another =
scheme may create confusion.



Nits:

n1. Please expand on first mention: DLEP (in the abstract), RF.

n2. s/Dynamic Link Event Protocol/Dynamic Link Exchange Protocol

n3. s/draft/document

n4. Change the order of the sections putting "Credit Window Data Item Defin=
itions" before "DLEP Data Items for Credit-Window Extension".
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Termination is, unless a =
late change that I&#8217;ve missed was made, a standard DLEP behaviour. So =
if there&#8217;s an issue, it&#8217;s probably a general DLEP issue rather
 than just a credit window issue.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">That said, I think the DL=
EP security model is to assume that there won&#8217;t be anything injected =
on a dedicated radio (*) to router link. I don&#8217;t recall how clearly
 that&#8217;s said in the DLEP draft. But if that is accepted from DLEP, I =
don&#8217;t think it&#8217;s new to credit window (though a reference could=
 be made to that).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">(*) DLEP uses modem. I co=
ntinue to think radio, while not ideal, is a better word. This is supported=
 by that some non-IETF work I&#8217;m aware of (and the authors
 are aware of) that discussed DLEP translated modem to radio to present to =
a customer community (even in quotations from the draft). However that view=
 didn&#8217;t gain traction in this WG.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">--
<o:p></o:p></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#BEBEBE">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
ot;sans-serif&quot;;color:#00007E"><br>
</span><b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quo=
t;sans-serif&quot;;color:#7D7D7D">T</span></b><span style=3D"font-size:8.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#7D7D7D">: &nb=
sp;&#43;44 (0)1245 242194 &nbsp;| &nbsp;<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesyst=
ems.com</a><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#00007E"><br>
</span><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&quot;s=
ans-serif&quot;;color:#3A8B92">BAE Systems Applied Intelligence, Chelmsford=
 Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai"><span style=3D"color:#3A8B92">www.=
baesystems.com/ai</span></a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:8.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;;color:#3A8B92">BAE Systems Applied Intellig=
ence Limited<br>
Registered in England &amp; Wales No: 01337451<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:8.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#3A8B9=
2">Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> manet [mailto:manet-bounces@ietf.org]
<b>On Behalf Of </b>Alvaro Retana (aretana)<br>
<b>Sent:</b> 21 June 2016 19:38<br>
<b>To:</b> draft-ietf-manet-credit-window@ietf.org<br>
<b>Cc:</b> manet@ietf.org; manet-chairs@ietf.org<br>
<b>Subject:</b> [manet] AD Review of draft-ietf-manet-credit-window-04<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:solid windowtext 1.0pt;padding:1.0pt 4.0pt 1.0pt 4.0pt=
">
<p class=3D"MsoNormal" align=3D"center" style=3D"mso-margin-top-alt:auto;ms=
o-margin-bottom-alt:auto;text-align:center">
<span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">*<stro=
ng><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">**
</span></strong></span><strong><span style=3D"font-size:10.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;">WARNING
</span></strong><strong><span style=3D"font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">***</span></strong><span style=3D"font-size:8.5pt;font-fa=
mily:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;=
sans-serif&quot;">EXTERNAL EMAIL -- This message originates from outside ou=
r organization</span><span style=3D"font-size:8.5pt;font-family:&quot;Arial=
&quot;,&quot;sans-serif&quot;">.</span><o:p></o:p></p>
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<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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<div style=3D"border:solid black 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quo=
t;;color:black"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<o:p></o:p></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
s-serif&quot;;color:#333972">This message originates from outside our organ=
isation, either from an external partner or the internet.</span></em><i><sp=
an style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;;color:#333972"><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Co=
nsider carefully whether you should click on any links, open any attachment=
s or reply.</span></em><br>
<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Fo=
r information regarding </span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:&quo=
t;Arial&quot;,&quot;sans-serif&quot;;color:red">Red Flags</span></i></stron=
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ans-serif&quot;;color:#333972"> that you can look out for in emails you rec=
eive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:&quot;A=
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<em><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">If=
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this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#333972"><o:p></o:p=
></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Stan:<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi! &nbsp;How are you?<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I just finished reading thi=
s document. &nbsp;First of all, thanks for taking this work on!<o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Please see my comments belo=
w. &nbsp;I think many of the comments (even the Major ones) should be easy =
to address. &nbsp;However, I am specially concerned about the actions
 (terminate) to be taken in some of the cases &#8212; which, I think, make =
DLEP vulnerable.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">After you address the Major=
 comments and provide a revised ID, I will want to get a review from the Tr=
ansport Area, probably in parallel with the IETF Last Call
 (depending on where we are with the DLEP document).<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks!<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Alvaro.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Major:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M1. &quot;Credit Use Reject=
ed&quot; Status. &nbsp;When should this Status be used? &nbsp;I'm guessing =
that maybe windowing is not supported (the router understands the feature, =
but
 doesn't support it) -- what else? &nbsp;I suspect that it is up to the rec=
eiver to use this status as it sees fit, is that the intent? &nbsp;If so, p=
lease clearly say so. &nbsp;Are there any well-known reasons that might be =
beneficial to mention?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M2. Both Sections&nbsp;8.1.=
 (DLEP Destination Up Message) and&nbsp;8.2. (DLEP Destination Announce Mes=
sage) say that &quot;MUST&nbsp;use the value in Credit Grant as the initial
 value&#8230;&quot;. &nbsp;But given that the credit use can be rejected, t=
he &quot;MUST&quot; is misleading. &nbsp;s/MUST/SHOULD or clarify &quot;&#8=
230;if accepted&#8230;&quot;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3. It is not a requirement=
 that Credit Windows be always implemented in both directions, right?&nbsp;=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3.1. Sections&nbsp;5. (Ope=
ration),&nbsp;8.3. (DLEP Destination Up Response Message) and 8.4. (DLEP De=
stination Announce Response Message) all say that after&nbsp;receiving
 a Credit Grant data item &quot;the receiver MUST respond&#8230;with a resp=
onse message that contains a Credit Grant data item&quot;. &nbsp;However, S=
ection&nbsp;9.1. (Credit Grant) says that &quot;the receiver MUST respond w=
ith a message containing a Credit Window Status data item&quot;, which
 seems to be the right thing.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3.2. It seems to me that (=
in 8.3 and 8.4) this text should also talk about the Credit Window Status d=
ata item:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3.2.1. (in the&nbsp;respon=
se): &quot;&#8230;if the corresponding&#8230;message did not contain&nbsp;a=
 Credit Grant&#8230;Response&nbsp;message MUST NOT contain a Credit Grant (=
Section 9.1) data item&quot;.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3.2.2. &quot;receiver of&#=
8230;Response MUST use the received Credit&nbsp;Grant value to initialize&#=
8230;&quot;.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M3.3. Related to this point=
, Section&nbsp;9.1. (Credit Grant) says that the &quot;Credit Grant data it=
em MAY appear in the DLEP Destination Up, Destination Announce, and
 Destination Update messages.&quot; &nbsp;No &nbsp;response messages are li=
sted, which is ok. &nbsp;I would suggest you stress that those are the only=
 messages which can contain the data item. &nbsp;Either s/MAY/MAY only, or =
(even better) s/MAY/MUST only &nbsp; [I think the &quot;MUST&quot; is ok
 because the Operation section already talks about not every destination ne=
eding credit windowing.]<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M4. Credit Window Out of Sy=
nc status code. &nbsp;Both 8.3 and 8.4 say that if a peer &quot;detects a m=
ismatch in the presence or absence&nbsp;of credit window data items&#8230;M=
UST
 terminate the session&quot;.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M4.1. Section&nbsp;7. (DLEP=
 Status Codes for Credit-Window Extension) says lists the failure mode as &=
quot;Continue&quot;. &nbsp;Please correct that and make sure that the regis=
tration
 request explicitly tells IANA which range to assign the status codes from.=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M4.2. It seems to me that u=
sing a &quot;terminate&quot; failure mode may be overkill. &nbsp;It also se=
ems to me that it would be straight forward to require a Credit Grant data
 item to be sent after receiving this status code and let the session resyn=
c on its own (or send a Credit Grant if the lack of sync is detected locall=
y) &#8212; it looks like the potential impact of resetting the session may =
not be justified for a single stream.
 &nbsp;I note in the DLEP spec that even refusing to do something (Request =
Denied) has a failure mode of Continue.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5. Section&nbsp;9.2. (Cred=
it Window Status) says that if the &quot;local credit&nbsp;counts are not s=
ynchronized&#8230;MAY either&#8230;or o Issue a DLEP Destination&nbsp;Down =
message, to clear
 credit counts on the session.&quot;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5.1. [nit] was this&nbsp;i=
ntended to be a bulleted list?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5.2. The &quot;MAY&quot; i=
ndicates that both actions are optional. &nbsp;IOW, it says that neither ac=
tion has to be performed. &nbsp;If that is so, then how do we get the sessi=
on
 back in sync?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5.3. That second option (D=
estination Down) could also result in the routing protocol (or anyone else =
listening to DLEP) to reset their adjacency. &nbsp;As I mentioned
 above, this action seems to be too drastic because of the effect. &nbsp;Or=
 am I missing something?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5.4. Going back to the &qu=
ot;MAY either&quot; part. &nbsp;When (Why) would an implementation chose no=
t to use the least intrusive option?<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M5.5. Given the potential p=
roblems with falling out to sync, why is this section not more prescriptive=
: &quot;It is recommended that implementations issue a DLEP Destination&nbs=
p;Update
 with a Credit Window Status data item at a configurable&nbsp;multiple of t=
he DLEP Heartbeat timer&#8230;&quot; &nbsp;Maybe s/recommended/RECOMMENDED<=
o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M6. Section&nbsp;9.3. (Cred=
it Request)&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M6.1. &quot;If the correspo=
nding&#8230;message for this session did not contain a&nbsp;Credit Grant da=
ta item&#8230;then receipt of the Credit Request data item MUST be consider=
ed
 as an error by the receiver, requiring termination of the DLEP peer sessio=
n.&quot; &nbsp;Same comment as before; very disruptive!<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M6.2. There's no guidance a=
s to what should be done when receiving a Credit Request.<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M7. Section&nbsp;10. (Secur=
ity Considerations)<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M7.1. &quot;The&nbsp;extens=
ion does not introduce any additional threats above those&nbsp;documented i=
n [DLEP].&quot; &nbsp;I disagree. &nbsp;The extra opportunities to reset th=
e DLEP session
 create a&nbsp;potential DoS attack: a peer can (for example) send a Credit=
 Request for any destination not using credits and the whole session is res=
et, potentially affecting other flows.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">M7.2. &quot;The mitigation =
strategy documented in that document is sufficient to&nbsp;secure operation=
 of this extension.&quot; &nbsp;Neither &quot;mitigation&quot; nor &quot;st=
rategy&quot; show up
 in the DLEP document&nbsp;&#8212;&nbsp;you'll have to be more specific.<o:=
p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Minor:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">p1. For ease of tracking, p=
lease number the TBD values (for example TBD1, TBD2, etc.) throughout the d=
ocument to match the requests to IANA.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">p2. Section 6 is superfluou=
s, please delete it.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">p3. &quot;Descriptions of t=
he data items are included below.&quot; &nbsp;Please put a reference.<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">p4. The format in Section&n=
bsp;9.1. (Credit Grant) shows two &quot;Credit Increment&quot; fields. &nbs=
p;From the explanation which indicates a &quot;64-bit quantity),&nbsp;I'm a=
ssuming that
 these are really not 2 independent fields, but one big (64-bits) &quot;Cre=
dit Increment&quot; field. &nbsp;Please fix the figure.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">P4.1. The MRW/RRW in the fi=
gure in Section 9.2 have the same&nbsp;problem.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">p5. I don't think the refer=
ence to RFC5578 is needed. &nbsp;Pointing to another scheme may create conf=
usion.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Nits:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">n1. Please expand on first =
mention: DLEP (in the abstract), RF.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">n2. s/Dynamic Link Event Pr=
otocol/Dynamic Link Exchange Protocol<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">n3. s/draft/document<o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">n4. Change the order of the=
 sections putting &quot;Credit Window Data Item Definitions&quot; before &q=
uot;DLEP Data Items for Credit-Window Extension&quot;.<o:p></o:p></span></p>
</div>
</div>
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From: Rick Taylor <rick@tropicalstormsoftware.com>
To: "draft-ietf-manet-dlep@ietf.org" <draft-ietf-manet-dlep@ietf.org>, "manet@ietf.org" <manet@ietf.org>, "sratliff@idirect.net" <sratliff@idirect.net>, "lberger@labn.net" <lberger@labn.net>
Thread-Topic: [manet] DLEP question
Thread-Index: AQHRzGYomCZFzPj0W0eRWhFX+szX4Z/1SwSAgAAiEYCAAGDGgIAA5s+A
Date: Thu, 23 Jun 2016 09:10:41 +0000
Message-ID: <1466673041.28636.63.camel@tropicalstormsoftware.com>
References: <cd6da0ee-3766-4b25-4097-925ec49c8314@labn.net> <3ca9ff337d414c9499cb7c0e34867971@VAUSDITCHM2.idirect.net> <dd96d3d9-e874-dab9-3849-200ec855f9f3@labn.net> <25f3b91480d64425b4ec774506208029@VAUSDITCHM2.idirect.net> <1466586684.28636.15.camel@tropicalstormsoftware.com> <725f8efa-993f-e1d8-39ff-2e722294b63b@labn.net> <1466602693.28636.41.camel@tropicalstormsoftware.com> <a14ac07c-afc3-b10a-aae7-099cfdbb3a23@labn.net>
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Subject: Re: [manet] DLEP question
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: Jiazi YI <ietf@jiaziyi.com>, Christopher Dearlove <christopher.dearlove@gmail.com>
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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>, "draft-ietf-manet-credit-window@ietf.org" <draft-ietf-manet-credit-window@ietf.org>
Thread-Topic: AD Review of draft-ietf-manet-credit-window-04
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Date: Thu, 23 Jun 2016 11:00:12 +0000
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Subject: Re: [manet] AD Review of draft-ietf-manet-credit-window-04
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On 6/23/16, 4:54 AM, "Dearlove, Christopher (UK)" <chris.dearlove@baesystem=
s.com<mailto:chris.dearlove@baesystems.com>> wrote:

Christopher:

Hi!

Termination is, unless a late change that I've missed was made, a standard =
DLEP behaviour. So if there's an issue, it's probably a general DLEP issue =
rather than just a credit window issue.

I don't have an issue with the Terminate Failure Mode; you're right, it is =
in the base spec.

I have an issue with using the Terminate Failure Mode to reset the DLEP ses=
sion if one of the credit windows falls out of sync (the ID says "...mismat=
ch in the presence or absence of credit window data items...").  I have an =
issue with that because terminating the DLEP session would have an impact w=
ell beyond the one destination credit window we're trying to fix.

Alvaro.

--_000_D391368F13058Earetanaciscocom_
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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/23/16, 4:54 AM, &quot;Dearlove, Christopher (UK)&quot; &lt;<a hre=
f=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesystems.com</a=
>&gt; wrote:</div>
<div><br>
</div>
<div>Christopher:</div>
<div><br>
</div>
<div>Hi!</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div><br>
</div>
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<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Termination is, unless a late chang=
e that I&#8217;ve missed was made, a standard DLEP behaviour. So if there&#=
8217;s an issue, it&#8217;s probably a general DLEP issue
 rather than just a credit window issue.</span></p>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I don't have an issue with the Terminate Failure Mode; you're right, i=
t is in the base spec.</div>
<div><br>
</div>
<div>I have an issue with using the Terminate Failure Mode to reset the DLE=
P session if one of the credit windows falls out of sync (the ID says &quot=
;&#8230;mismatch in the presence or absence of credit window data items&#82=
30;&quot;). &nbsp;I have an issue with that because terminating
 the DLEP session would have an impact well beyond the one destination cred=
it window we're trying to fix.</div>
<div><br>
</div>
<div>Alvaro.</div>
</body>
</html>

--_000_D391368F13058Earetanaciscocom_--


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From: Lou Berger <lberger@labn.net>
To: Rick Taylor <rick@tropicalstormsoftware.com>, <draft-ietf-manet-dlep@ietf.org>, <manet@ietf.org>, <sratliff@idirect.net>
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Subject: Re: [manet] DLEP question
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Rick,
the proposed change will resolve my comment/concern.

Thank you,
Lou

On June 23, 2016 5:11:59 AM Rick Taylor <rick@tropicalstormsoftware.com> wrote:
...
>
> However, adding optional IP address/subnet information to the announce
> response is a minor change, and may cover a use-case we have not
> considered, and aligns the content with Destination Update.Â 
>
> We will most likely be issuing an update to take onboard the AD
> comments we have received, so we have a good opportunity to address
> this.
>
> Thanks for really having a good look at the doc!
>
> Rick
>
>>
>> Thanks,
>> Lou
>> Â 
>>



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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: MANET IETF <manet@ietf.org>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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From: "Ratliff, Stanley" <sratliff@idirect.net>
To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>, MANET IETF <manet@ietf.org>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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Date: Thu, 23 Jun 2016 14:02:29 +0000
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Ratliff, Stanley" <sratliff@idirect.net>, MANET IETF <manet@ietf.org>
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From: Jiazi YI <ietf@jiaziyi.com>
Date: Thu, 23 Jun 2016 23:24:45 +0200
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To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>,  "Ratliff, Stanley" <sratliff@idirect.net>
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Cc: MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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Hi Chris, Stan:

It's good point that we need to add some text about applying RFC6554 to
MANET. We will make a proposal later.

Regarding the issues of "referencing an RPL RFC", the problem we have with
AODVv2 is very different from this.

AODVv2 tries to reference RFC6551, which defines a set of metric types and
it states

*     Low-Power and Lossy Networks (LLNs) have unique characteristics*
*     compared with traditional wired and ad hoc networks that require the*
*     specification of new routing metrics and constraints. *

as the first sentence in the abstract.

For olsrv2-multipath, it has a reference to RFC6554, which defines a source
routing header with address compression. Although it has "RPL" in its
title, the format itself is protocol-neutral. I would imagine if someone
want to implement DSR with IPv6, the RFC6554 would be a natural choice.
As we will restrict the header to be used only in foo-protocol routing
domain, there won't be any interoperability issue.
We can, of course, proposal another RFC and ask for new "IPv6 Routing Type"
to support source routing in IPv6 by just removing RPL-related clause in
RFC6554. But it would be the same packet format, except the "IPv6 Routing
Type" number --- personally, I don't think it's necessary.

I'm having Alvaro in cc also, because it's kind of cross WG issue.
Alvaro: Using source routing is not a rare case in IPv6. Only considering
MANET WG, there is DSR, and AODVv2 (although it's now off the charter) also
discussed possible extension with path accumulation.
Personally, I believe having a reference to RFC6554 should be OK, with some
explanations in the draft. Your advice would be appreciated.

cheers

Jiazi

On Thu, Jun 23, 2016 at 4:08 PM, Dearlove, Christopher (UK) <
chris.dearlove@baesystems.com> wrote:

> I think this is really a comment for Jiazi. I=E2=80=99m not suggesting ad=
ding a
> reference to RFC 6554, that reference is already in the draft.
>
>
>
> I=E2=80=99m saying that if you reference RFC 6554, you=E2=80=99re referen=
cing something
> that doesn=E2=80=99t apply unless and until you add some text to make it =
apply.
>
>
>
> Whether that is a terrible awful thing that should not be done (not my
> words - in fact I don=E2=80=99t recall commenting on that aspect of AODVv=
2) is up
> to the community to judge.
>
>
>
> But input from the people who have implemented this draft would be useful=
.
> Did they find RFC 6554 already in place? Already implemented and portable
> to in place? Had to write in from scratch? Didn=E2=80=99t actually use RF=
C 6554 but
> something else (e.g. deprecated RH0)? Only implemented for IPv4?
>
>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* Ratliff, Stanley [mailto:sratliff@idirect.net]
> *Sent:* 23 June 2016 15:02
> *To:* Dearlove, Christopher (UK); MANET IETF
> *Subject:* RE: [manet] draft-ietf-olsrv2-multipath-09
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> Chris,
>
>
>
> I see your point on RFC 6554. But didn=E2=80=99t we **just** go through a=
n
> exercise with AODVv2 where that draft attempted to reference a RPL RFC, a=
nd
> the consensus of the WG was that this was a =E2=80=9Cterrible, awful thin=
g that
> should not be done=E2=80=9D?????
>
>
>
> Regards,
>
> Stan
>
>
>
> *From:* manet [mailto:manet-bounces@ietf.org <manet-bounces@ietf.org>] *O=
n
> Behalf Of *Dearlove, Christopher (UK)
> *Sent:* Thursday, June 23, 2016 9:50 AM
> *To:* MANET IETF <manet@ietf.org>
> *Subject:* Re: [manet] draft-ietf-olsrv2-multipath-09
>
>
>
> Digging further, there was a draft-reitzel-ipv4-source-routing-is-evil-00
> that pointed out that IPv4 source routing had exactly the same problems a=
s
> the deprecated RH0 IPv6 source routing, and recommended deprecating that.
> But the draft never preceded further. I don=E2=80=99t know why. I have se=
en it
> indicated that most operators drop such packets, so maybe it wasn=E2=80=
=99t felt
> necessary.
>
>
>
> As for why RFC 6554 avoids the RH0 problem, essentially it defines it
> away: =E2=80=9Ca RPL router drops datagrams that include multiple address=
es
> assigned to any interfaces on that router to avoid forwarding loops=E2=80=
=9D Note
> that=E2=80=99s not as simple as dropping datagrams with duplicate address=
es, it
> also includes dropping datagrams with two addresses of the same interface=
 -
> which only that router can do.
>
>
>
> So, in order to use RFC 6554 source routing here, we need to (a) say that
> a required condition is that the MANET routers support RFC 6554, because
> that RFC itself only specifies this for RPL routers, and (b) that they mu=
st
> support the required features in particular the datagram suppression note=
d
> above.
>
>
>
> But, I wouldn=E2=80=99t expect a typical router currently to do this, bec=
ause it
> won=E2=80=99t be =E2=80=9Can RPL router=E2=80=9D - here input from people=
 who have done this hands
> on would be useful, did they have to add this functionality?
>
>
>
> And for IPv4, need (loose) source routing to be supported within the
> MANET, which again it may or may not be.
>
>
>
> (Note that RFC 6554 source routing isn=E2=80=99t the same as RH0 source r=
outing,
> because RFC 6554 source routing includes compression.)
>
>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* manet [mailto:manet-bounces@ietf.org <manet-bounces@ietf.org>] *O=
n
> Behalf Of *Dearlove, Christopher (UK)
> *Sent:* 23 June 2016 10:39
> *To:* Jiazi YI; Christopher Dearlove
> *Cc:* MANET IETF
> *Subject:* Re: [manet] draft-ietf-olsrv2-multipath-09
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> **** **WARNING ******
> EXTERNAL EMAIL -- This message originates from outside our organization.
>
>
>
> Coincidentally, I was reading about IPv6 source routing, and the
> deprecation of RH0 in RFC 5095. RFC 6554 that you refer to claims to have
> resolved the security concerns that led to that deprecation. Part of that
> is that RFC 6554 is only defined as working in an RPL domain. Now that ca=
n
> probably be generalised to a MANET - but I don=E2=80=99t think you=E2=80=
=99ve done that,
> and so I think that needs doing.
>
>
>
> I=E2=80=99m then left wondering if the security threat described in RFC 5=
095
> applies to IPv4 source routing. (I=E2=80=99m afraid I haven=E2=80=99t had=
 time to dig into
> this, the coincidence has only just happened, and I thought better to get
> an incomplete question out.) RFC 5095 doesn=E2=80=99t discuss IPv4 at all=
, but the
> basic problem (repeating an address in a source route as an attack) would
> appear to still apply. I haven=E2=80=99t understood yet how RFC 6554 avoi=
ds this.
> It=E2=80=99s possible that RFC 5095 doesn=E2=80=99t consider IPv4 on the =
basis that most
> people have given up on it, or just it wasn=E2=80=99t of interest to the =
authors.
>
>
>
> At the minimum I think the draft needs to comment on extending RFC 6554 t=
o
> MANETs not RPL domains. Ideally (this may or may not cause added security
> considerations) someone with a better knowledge of this area (practical a=
s
> well as theoretical) will comment on the above.
>
>
>
> *-- *
>
>
>
>
> *Christopher Dearlove Senior Principal Engineer BAE Systems Applied
> Intelligence Laboratories *
> *________________________________________________________________________=
__
> *
> *T*:  +44 (0)1245 242194  |  *E: *chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great
> Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
>
>
> *From:* yi.jiazi@gmail.com [mailto:yi.jiazi@gmail.com <yi.jiazi@gmail.com=
>]
> *On Behalf Of *Jiazi YI
> *Sent:* 21 June 2016 22:24
> *To:* Christopher Dearlove
> *Cc:* Dearlove, Christopher (UK); MANET IETF
> *Subject:* Re: [manet] draft-ietf-olsrv2-multipath-09
>
>
>
>
>
> **** WARNING ****
>
> *This message originates from outside our organisation, either from an
> external partner or the internet.*
>
> * Consider carefully whether you should click on any links, open any
> attachments or reply. For information regarding **Red Flags** that you
> can look out for in emails you receive, click here
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Red%20Flags.pdf>.*
> * If you feel the email is suspicious, please follow this process
> <http://intranet.ent.baesystems.com/howwework/security/spotlights/Documen=
ts/Dealing%20With%20Suspicious%20Emails.pdf>.*
>
> We will add some text to make it more precise.
>
>
>
> best
>
>
>
> Jiazi
>
>
>
> On Tue, Jun 21, 2016 at 1:02 AM, Christopher Dearlove <
> christopher.dearlove@gmail.com> wrote:
>
> "Because the encoded blocks are unordered for FEC" is, at best, only
> applicable to some FEC methods, it's definitely not universal.
>
> --
>
> Christopher Dearlove
>
>
> On 20 Jun 2016, at 23:41, Jiazi YI <ietf@jiaziyi.com> wrote:
>
> Hi,
>
>
>
> On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) <
> chris.dearlove@baesystems.com> wrote:
>
> Comments below.
>
>
>
> Short version, still some points I think can be improved. Down to one
> sticking point, on deciding on how to handle changes to, and cessation of=
,
> the reactive set. (Longer text below.) I think this is a real issue. Take=
 a
> look at what you do in your implementation - now see if someone could wor=
k
> out to do that from the text. I don=E2=80=99t think they can.
>
>
>
>
>
> we clarified this in the draft. Please check the our detailed reply below=
.
>
>
>
> <snip>
>
>
> Page 5, second bullet. How does FEC help with packet re-ordering?
>
>
>
> Normally, the packets are coded in different "blocks" and those blocks ar=
e
> transmitted in different paths. The arriving order of those "blocks" is
> less important.
>
>
>
> CMD> I still don=E2=80=99t see how it helps with packet re-ordering.
>
>
>
> When FEC is applied, the encoder takes one or several packets and produce
> several coded blocks (denoted block-1, block-2, ... block-n). Those block=
s
> are forwarded as IP datagrams in the disjoint paths. Because the encoded
> blocks are unordered for FEC, the arriving order of the encoded blocks of
> the same packet(s) doesn't really matter.
>
>
>
>
>
> <snip>
>
> Page 6, first paragraph. I still disagree with characterising as low data
> rate links. At most the protocol multiplies capacity by a small factor, n=
ot
> the orders pf magnitude that link capacities span.
>
>
>
> We won't claim that there will be orders of magnitude that link capacitie=
s
> span, but it would be beneficial to have aggregated throughput and load
> balancing.
>
>
>
> So what do you think of:
>
>
>
> MP-OLSRv2 is designed for networks with dynamic topology by avoiding
> single route failure. It can also provide higher aggregated throughput an=
d
> load balancing, which is beneficial for low data rate links.
>
>
>
> CMD> Still not convinced by the phrase low data rate links. The issues ar=
e
> ones of load relative to network capacity, and in particular if there are
> underutilised parts of the network. Plus of course a redundancy issue if
> packets do not all need to arrive. These can all occur in high data rate
> networks as much as low data rate ones.
>
>
>
>
>
> It makes sense. I'm OK with removing the text related to low data rate
> links.
>
>
>
> <snip>
>
>
>
> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that as =
well (e.g
> Routing Set).
>
>
>
> Actually, the number of the items in the array PT_address[1...n] already
> gives the hop count -- is it necessary to repeat the information with an
> additional field? It is not used anyways.
>
>
>
> CMD> That it=E2=80=99s there could be called out. It gets used in OLSRv2 =
as a
> suggested tie-breaker, and some tools might use it. I thought I=E2=80=99d=
 made a
> comment to say what n is, which I don=E2=80=99t see here. This can combin=
e with that
>
>
>
> Yes. we added some text on what "n" is.
>
>
>
> <snip>
>
> A major omission is discussion of expiry of new Tuples without expiry
> times. If proactive you can (but don=E2=80=99t) discuss when supporting s=
ets
> change.
>
> If reactive it=E2=80=99s rather a mess (a reason I dislike the reactive
> mechanism). When to discard? When to recreate? If dependent on packet flo=
w
> then that=E2=80=99s another interaction with IP to document - and impleme=
nt.
>
>
>
> The update of the the Multi-path routing set is described in section 8.6.
> The expiry timers are removed since -07 based on the comments received. O=
ne
> of the reasons is to be consistent with the OLSRv2 routing set, in which =
no
> expiry timer is used.
>
> Generally speaking, in proactive mode, it follows the same mechanism as
> OLSRv2: when ever there is a need to update the OLSRv2 routing set, the
> multi-path routing set is updated.
>
> In reactive mode, all the Multi-path routing tuples are removed when the
> "topology graph" is changed.  The new tuples are recreated "on-demand".
>
>
>
> CMD> OK, let=E2=80=99s think about that in the reactive case. (Proactive =
is easy,
> but it needs to be said, which it isn=E2=80=99t.) You want a set, you gen=
erate it
> on demand. There is a change to the Topology Graph. So do you recalculate
> the set?
>
>
>
> No, at this point, we only clear the entire Multi-path Routing Set.
>
>
>
> If not then you introduce a stutter, as the packets are flowing and the
> set disappears and you need to trigger it again.
>
>
>
> Yes, it necessary to trigger the calculation again. But the time required
> is trivial, because this is only local: no additional message exchange wi=
th
> other routers is required.
>
>
>
> Which means monitoring for that throughout a flow, not just at its start.
>
>
>
> We don't actually have the concept "flow" in this extension. For each
> datagram, yes, it's necessary to check if a tuple exist or not. There is =
no
> much difference from checking the FIB for IP.
>
>
>
> If you do (recalculate the set when the graph changes) how do you know
> when to stop calculating it? That depends on knowing when the flow stops.
>
> And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more than is required=
 - some changes
> to the graph would have no effect (for example the increase in metric of =
a
> link not being used). But it=E2=80=99s hard to specify.
>
>
>
> For the moment, we simply take "the topology graph changes", because even
> links that not used might matters: for example, the decrease in metric of=
 a
> not used metric that introduces a better path.
>
> It's true that it's possible that it's more than required and could be
> optimised in the future, but considering it's a reactive approach, I
> believe it's acceptable.
>
>
>
> On this point (which changes) some sort of permissive wording to indicate
> that you can avoid making changes when you know they don=E2=80=99t matter=
 is
> probably right. The when do you stop calculating question is more importa=
nt
> - and needs text discussing it.
>
>
>
>
> You could when acting reactively forward by usual means in all cases whil=
e
> waiting.
>
> The actual packet forwarding by round-robin is an IP process, not this
> protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP proces=
s, why
> mandate exactly how it=E2=80=99s used?
>
>
>
> Choosing which path to put in the source routing header is
> olsrv2-multipath specific, because there are multiple of them. Of course,
> using round-robin is not mandatory -- using other schedulers won't impact
> the compatibility. Actually, we put it as one of the experiment points al=
so:
>
>
>
>
>
>
>
> * Different path-selection schedulers.  By default, Round-Robin
> scheduling is used to select a path to be used for datagrams.  In
> some scenarios, weighted scheduling can be considered: for       example,
> the paths with lower metrics (i.e., higher quality) can       transfer mo=
re
> datagrams compared to paths with higher metrics.*
>
>
>
> CMD> This is missing my point. It=E2=80=99s not the round-robin that matt=
ers, it=E2=80=99s
> that IP needs to do anything. That=E2=80=99s what needs not to be buried.=
 Putting
> together a clear =E2=80=9Cwhat IP needs to do=E2=80=9D section early on, =
perhaps in the
> applicability section, is needed.
>
>
>
>
>
> We added the following text in the applicability statement:
>
>
>
> *MP-OLSRv2 supports two different, but interoperable multi-path
> calculation approaches: proactive and reactive. In the proactive
> calculation, the paths to all the destinations are calculated before
> needed. In the reactive calculation, only the paths to desired
> destination(s) are calculated on demand. The proactive approach requires
> more computational resources than the reactive one. The reactive approach
> requires the IP forwarding plan to trigger the multi-path calculation.*
>
>
>
> *MP-OLSRv2 forwards datagrams using the source routing header. As there
> are multiple paths to each destination, MP-OLSRv2 requires the IP
> forwarding plan to be able to choose which source route to be put in the
> source routing header based on the path scheduler defined by MP-OLSRv2. F=
or
> IPv4 networks, implementation of loose source routing is required followi=
ng
> [RFC0791]. For IPv6 networks, implementation of strict source routing is
> required following [RFC6554].*
>
>
>
> As usual, an updated draft is attached, in case needed.
>
>
>
> regards
>
>
>
> Jiazi
>
>
>
>
>
>
>
> <draft-ietf-manet-olsrv2-multipath.txt>
>
>
>
> ********************************************************************
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> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>
>
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>

--001a113fbed206b4650535f8af6a
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Chris, Stan:<div><br></div><div>It&#39;s good point tha=
t we need to add some text about applying RFC6554 to MANET. We will make a =
proposal later.=C2=A0</div><div><br></div><div>Regarding the issues of &quo=
t;referencing an RPL RFC&quot;, the problem we have with AODVv2 is very dif=
ferent from this.=C2=A0</div><div><br></div><div>AODVv2 tries to reference =
RFC6551, which defines a set of metric types and it states=C2=A0</div><div>=
<br></div><div><i>=C2=A0 =C2=A0 =C2=A0Low-Power and Lossy Networks (LLNs) h=
ave unique characteristics</i><div><i>=C2=A0 =C2=A0 =C2=A0compared with tra=
ditional wired and ad hoc networks that require the</i></div><div><i>=C2=A0=
 =C2=A0 =C2=A0specification of new routing metrics and constraints.=C2=A0</=
i></div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">as =
the first sentence in the abstract.=C2=A0</div><div class=3D"gmail_extra"><=
br></div><div class=3D"gmail_extra">For olsrv2-multipath, it has a referenc=
e to RFC6554, which defines a source routing header with address compressio=
n. Although it has &quot;RPL&quot; in its title, the format itself is proto=
col-neutral. I would imagine if someone want to implement DSR with IPv6, th=
e RFC6554 would be a natural choice.=C2=A0</div><div class=3D"gmail_extra">=
As we will restrict the header to be used only in foo-protocol routing doma=
in, there won&#39;t be any interoperability issue.=C2=A0</div><div class=3D=
"gmail_extra">We can, of course, proposal another RFC and ask for new &quot=
;IPv6 Routing Type&quot; to support source routing in IPv6 by just removing=
 RPL-related clause in RFC6554. But it would be the same packet format, exc=
ept the &quot;IPv6 Routing Type&quot; number --- personally, I don&#39;t th=
ink it&#39;s necessary. =C2=A0</div><div class=3D"gmail_extra"><br></div><d=
iv class=3D"gmail_extra">I&#39;m having Alvaro in cc also, because it&#39;s=
 kind of cross WG issue.=C2=A0</div><div class=3D"gmail_extra">Alvaro: Usin=
g source routing is not a rare case in IPv6. Only considering MANET WG, the=
re is DSR, and AODVv2 (although it&#39;s now off the charter) also discusse=
d possible extension with path accumulation.=C2=A0</div><div class=3D"gmail=
_extra">Personally, I believe having a reference to RFC6554 should be OK, w=
ith some explanations in the draft. Your advice would be appreciated.=C2=A0=
</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">cheer=
s</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">Jiaz=
i</div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Ju=
n 23, 2016 at 4:08 PM, Dearlove, Christopher (UK) <span dir=3D"ltr">&lt;<a =
href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chris.dearl=
ove@baesystems.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-colo=
r:rgb(204,204,204);border-left-style:solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I think this is really a comment for Jiazi. =
I=E2=80=99m not suggesting adding a reference to RFC 6554, that reference i=
s already in the draft.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I=E2=80=99m saying that if you reference RFC=
 6554, you=E2=80=99re referencing something that doesn=E2=80=99t apply unle=
ss and until you add some text to make it apply.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Whether that is a terrible awful thing that =
should not be done (not my words - in fact I don=E2=80=99t recall commentin=
g on that aspect of AODVv2) is up to the community
 to judge.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">But input from the people who have implement=
ed this draft would be useful. Did they find RFC 6554 already in place? Alr=
eady implemented and portable to in place?
 Had to write in from scratch? Didn=E2=80=99t actually use RFC 6554 but som=
ething else (e.g. deprecated RH0)? Only implemented for IPv4?<u></u><u></u>=
</span></p><span>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" value=3D"+441245242194" target=3D"_blank">+44 (0)1245 242194<=
/a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
</span><div>
<div style=3D"border-style:solid none none;border-top-color:rgb(181,196,223=
);border-top-width:1pt;padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;font=
-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"fo=
nt-size:10pt;font-family:Tahoma,sans-serif"> Ratliff, Stanley [mailto:<a hr=
ef=3D"mailto:sratliff@idirect.net" target=3D"_blank">sratliff@idirect.net</=
a>]
<br>
<b>Sent:</b> 23 June 2016 15:02<br>
<b>To:</b> Dearlove, Christopher (UK); MANET IETF<br>
<b>Subject:</b> RE: [manet] draft-ietf-olsrv2-multipath-09<u></u><u></u></s=
pan></p>
</div>
</div><div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><span lang=3D"EN-US" style=3D"font-family:Arial,sans-serif;=
color:black"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><b><span lang=3D"EN-US" style=3D"font-size:15pt;font-family=
:Arial,sans-serif;color:rgb(51,57,114)">*** WARNING ***<u></u><u></u></span=
></b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background-color:white">
<em><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Arial,sans-s=
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r:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
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<em><span style=3D"font-family:Arial,sans-serif">For information regarding =
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Chris,<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">I see your point on RFC 6554.=
 But didn=E2=80=99t we *<b>just</b>* go through an exercise with AODVv2 whe=
re that draft attempted to reference a RPL RFC,
 and the consensus of the WG was that this was a =E2=80=9Cterrible, awful t=
hing that should not be done=E2=80=9D?????
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Regards,<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Stan<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></=
p>
<div style=3D"border-style:none none none solid;border-left-color:blue;bord=
er-left-width:1.5pt;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-style:solid none none;border-top-color:rgb(225,225,225=
);border-top-width:1pt;padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11pt;font=
-family:Calibri,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"f=
ont-size:11pt;font-family:Calibri,sans-serif"> manet [<a href=3D"mailto:man=
et-bounces@ietf.org" target=3D"_blank">mailto:manet-bounces@ietf.org</a>]
<b>On Behalf Of </b>Dearlove, Christopher (UK)<br>
<b>Sent:</b> Thursday, June 23, 2016 9:50 AM<br>
<b>To:</b> MANET IETF &lt;<a href=3D"mailto:manet@ietf.org" target=3D"_blan=
k">manet@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u></u><u></u></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Digging further, there was a draft-reitzel-i=
pv4-source-routing-is-evil-00 that pointed out that IPv4 source routing had=
 exactly the same problems as the deprecated
 RH0 IPv6 source routing, and recommended deprecating that. But the draft n=
ever preceded further. I don=E2=80=99t know why. I have seen it indicated t=
hat most operators drop such packets, so maybe it wasn=E2=80=99t felt neces=
sary.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">As for why RFC 6554 avoids the RH0 problem, =
essentially it defines it away: =E2=80=9Ca RPL router drops datagrams that =
include multiple addresses assigned to any interfaces
 on that router to avoid forwarding loops=E2=80=9D Note that=E2=80=99s not =
as simple as dropping datagrams with duplicate addresses, it also includes =
dropping datagrams with two addresses of the same interface - which only th=
at router can do.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">So, in order to use RFC 6554 source routing =
here, we need to (a) say that a required condition is that the MANET router=
s support RFC 6554, because that RFC
 itself only specifies this for RPL routers, and (b) that they must support=
 the required features in particular the datagram suppression noted above.<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">But, I wouldn=E2=80=99t expect a typical rou=
ter currently to do this, because it won=E2=80=99t be =E2=80=9Can RPL route=
r=E2=80=9D - here input from people who have done this hands on would
 be useful, did they have to add this functionality?<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">And for IPv4, need (loose) source routing to=
 be supported within the MANET, which again it may or may not be.<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">(Note that RFC 6554 source routing isn=E2=80=
=99t the same as RH0 source routing, because RFC 6554 source routing includ=
es compression.)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" value=3D"+441245242194" target=3D"_blank">+44 (0)1245 242194<=
/a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border-style:solid none none;border-top-color:rgb(181,196,223=
);border-top-width:1pt;padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;font=
-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"fo=
nt-size:10pt;font-family:Tahoma,sans-serif"> manet [<a href=3D"mailto:manet=
-bounces@ietf.org" target=3D"_blank">mailto:manet-bounces@ietf.org</a>]
<b>On Behalf Of </b>Dearlove, Christopher (UK)<br>
<b>Sent:</b> 23 June 2016 10:39<br>
<b>To:</b> Jiazi YI; Christopher Dearlove<br>
<b>Cc:</b> MANET IETF<br>
<b>Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u></u><u></u></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><span style=3D"font-family:Arial,sans-serif;color:black"><u=
></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><b><span style=3D"font-size:15pt;font-family:Arial,sans-ser=
if;color:rgb(51,57,114)">*** WARNING ***<u></u><u></u></span></b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background-color:white">
<em><span style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(=
51,57,114)">This message originates from outside our organisation, either f=
rom an external partner or the internet.</span></em><i><span style=3D"font-=
size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
 you should click on any links, open any attachments or reply.</span></em><=
br>
<em><span style=3D"font-family:Arial,sans-serif">For information regarding =
</span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:Aria=
l,sans-serif;color:red">Red Flags</span></i></strong><em><span style=3D"fon=
t-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"> that you =
can look out for in emails you receive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:Arial,s=
ans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">If you feel the email is s=
uspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:Arial,sans-serif;color:rgb(51,57,114)"><u></u><u></u></span></p>
</div>
</div>
<div style=3D"border:1pt solid windowtext;padding:1pt 4pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span s=
tyle=3D"font-family:Arial,sans-serif">*<strong><span style=3D"font-family:A=
rial,sans-serif">**
</span></strong></span><strong><span style=3D"font-size:10pt;font-family:Ar=
ial,sans-serif">WARNING
</span></strong><strong><span style=3D"font-family:Arial,sans-serif">***</s=
pan></strong><span style=3D"font-size:8.5pt;font-family:Arial,sans-serif"><=
br>
</span><span style=3D"font-size:10pt;font-family:Arial,sans-serif">EXTERNAL=
 EMAIL -- This message originates from outside our organization</span><span=
 style=3D"font-size:8.5pt;font-family:Arial,sans-serif">.</span><u></u><u><=
/u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Coincidentally, I was reading about IPv6 sou=
rce routing, and the deprecation of RH0 in RFC 5095. RFC 6554 that you refe=
r to claims to have resolved the security
 concerns that led to that deprecation. Part of that is that RFC 6554 is on=
ly defined as working in an RPL domain. Now that can probably be generalise=
d to a MANET - but I don=E2=80=99t think you=E2=80=99ve done that, and so I=
 think that needs doing.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">I=E2=80=99m then left wondering if the secur=
ity threat described in RFC 5095 applies to IPv4 source routing. (I=E2=80=
=99m afraid I haven=E2=80=99t had time to dig into this, the coincidence
 has only just happened, and I thought better to get an incomplete question=
 out.) RFC 5095 doesn=E2=80=99t discuss IPv4 at all, but the basic problem =
(repeating an address in a source route as an attack) would appear to still=
 apply. I haven=E2=80=99t understood yet how RFC
 6554 avoids this. It=E2=80=99s possible that RFC 5095 doesn=E2=80=99t cons=
ider IPv4 on the basis that most people have given up on it, or just it was=
n=E2=80=99t of interest to the authors.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">At the minimum I think the draft needs to co=
mment on extending RFC 6554 to MANETs not RPL domains. Ideally (this may or=
 may not cause added security considerations)
 someone with a better knowledge of this area (practical as well as theoret=
ical) will comment on the above.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">--
<u></u><u></u></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)">Christopher De=
arlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11pt;font-family:Arial,sans-serif;co=
lor:rgb(190,190,190)">_____________________________________________________=
_____________________<br>
</span></b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:=
rgb(0,0,126)"><br>
</span><b><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:r=
gb(125,125,125)">T</span></b><span style=3D"font-size:8pt;font-family:Arial=
,sans-serif;color:rgb(125,125,125)">: =C2=A0<a href=3D"tel:%2B44%20%280%291=
245%20242194" value=3D"+441245242194" target=3D"_blank">+44 (0)1245 242194<=
/a> =C2=A0| =C2=A0<b>E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank">chri=
s.dearlove@baesystems.com</a><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
0,0,126)"><br>
</span><span style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(=
58,139,146)">BAE Systems Applied Intelligence, Chelmsford Technology Park, =
Great Baddow, Chelmsford, Essex CM2 8HN.<br>
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank"><span style=3D"c=
olor:rgb(58,139,146)">www.baesystems.com/ai</span></a><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:8pt;font-family:Arial,sans-=
serif;color:rgb(58,139,146)">BAE Systems Applied Intelligence Limited<br>
Registered in England &amp; Wales No: 01337451<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)">Registered Office=
: Surrey Research Park, Guildford, Surrey, GU2 7YP<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;font=
-family:Tahoma,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"fo=
nt-size:10pt;font-family:Tahoma,sans-serif">
<a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_blank">yi.jiazi@gmail.com<=
/a> [<a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_blank">mailto:yi.jiaz=
i@gmail.com</a>]
<b>On Behalf Of </b>Jiazi YI<br>
<b>Sent:</b> 21 June 2016 22:24<br>
<b>To:</b> Christopher Dearlove<br>
<b>Cc:</b> Dearlove, Christopher (UK); MANET IETF<br>
<b>Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border:1pt solid black;padding:2pt">
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><span style=3D"font-family:Arial,sans-serif;color:black"><u=
></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"text-align:center;backgrou=
nd-color:white"><b><span style=3D"font-size:15pt;font-family:Arial,sans-ser=
if;color:rgb(51,57,114)">*** WARNING ***<u></u><u></u></span></b></p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12pt;text-al=
ign:center;background-color:white">
<em><span style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(=
51,57,114)">This message originates from outside our organisation, either f=
rom an external partner or the internet.</span></em><i><span style=3D"font-=
size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">Consider carefully whether=
 you should click on any links, open any attachments or reply.</span></em><=
br>
<em><span style=3D"font-family:Arial,sans-serif">For information regarding =
</span>
</em></span></i><strong><i><span style=3D"font-size:10.5pt;font-family:Aria=
l,sans-serif;color:red">Red Flags</span></i></strong><em><span style=3D"fon=
t-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"> that you =
can look out for in emails you receive,
 click <a href=3D"http://intranet.ent.baesystems.com/howwework/security/spo=
tlights/Documents/Red%20Flags.pdf" target=3D"_blank">
here</a>.</span></em><i><span style=3D"font-size:10.5pt;font-family:Arial,s=
ans-serif;color:rgb(51,57,114)"><br>
<em><span style=3D"font-family:Arial,sans-serif">If you feel the email is s=
uspicious, please follow
<a href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights=
/Documents/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank">
this process</a>.</span></em></span></i><span style=3D"font-size:10.5pt;fon=
t-family:Arial,sans-serif;color:rgb(51,57,114)"><u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">We will add some text to make it more precise.=C2=A0=
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">best<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jun 21, 2016 at 1:02 AM, Christopher Dearlov=
e &lt;<a href=3D"mailto:christopher.dearlove@gmail.com" target=3D"_blank">c=
hristopher.dearlove@gmail.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">&quot;Because the encoded blocks are unordered for F=
EC&quot; is, at best, only applicable to some FEC methods, it&#39;s definit=
ely not universal.<br>
<br>
-- =C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Christopher Dearlove<u></u><u></u></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
On 20 Jun 2016, at 23:41, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com" =
target=3D"_blank">ietf@jiaziyi.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt">
<div>
<div>
<p class=3D"MsoNormal">Hi,=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christoph=
er (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_bla=
nk">chris.dearlove@baesystems.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Comments below.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Short version, still some points I think can=
 be improved. Down to one sticking point, on deciding
 on how to handle changes to, and cessation of, the reactive set. (Longer t=
ext below.) I think this is a real issue. Take a look at what you do in you=
r implementation - now see if someone could work out to do that from the te=
xt. I don=E2=80=99t think they can.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">we clarified this in the draft. Please check the our=
 detailed reply below.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal"><br>
Page 5, second bullet. How does FEC help with packet re-ordering?<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Normally, the packets are coded in different &quot;b=
locks&quot; and those blocks are transmitted in different paths. The arrivi=
ng order of those &quot;blocks&quot; is less important.=C2=A0<u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; I still don=E2=80=99t see how it hel=
ps with packet re-ordering.</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When FEC is applied, the encoder takes one or severa=
l packets and produce several coded blocks (denoted block-1, block-2, ... b=
lock-n). Those blocks are forwarded as IP datagrams in the disjoint paths. =
Because the encoded blocks are unordered
 for FEC, the arriving order of the encoded blocks of the same packet(s) do=
esn&#39;t really matter.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal">Page 6, first paragraph. I still disagree with chara=
cterising as low data rate links. At most the protocol multiplies capacity =
by a small factor, not the orders pf magnitude that
 link capacities span.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We won&#39;t claim that there will be orders of magn=
itude that link capacities span, but it would be beneficial to have aggrega=
ted throughput and load balancing.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">So what do you think of:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">MP-OLSRv2 is designed for networks with dynamic topo=
logy by avoiding single route failure. It can also provide higher aggregate=
d throughput and load balancing, which is beneficial
 for low data rate links. =C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; Still not convinced by the phrase lo=
w data rate links. The issues are ones of load relative
 to network capacity, and in particular if there are underutilised parts of=
 the network. Plus of course a redundancy issue if packets do not all need =
to arrive. These can all occur in high data rate networks as much as low da=
ta rate ones.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">It makes sense. I&#39;m OK with removing the text re=
lated to low data rate links.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal">PT_=E2=80=A6 What about hop count? Elsewhere in OLSR=
v2 we record that as well (e.g Routing Set).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Actually, the number of the items in the array PT_ad=
dress[1...n] already gives the hop count -- is it necessary to repeat the i=
nformation with an additional field? It is not used
 anyways.=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; That it=E2=80=99s there could be cal=
led out. It gets used in OLSRv2 as a suggested tie-breaker, and
 some tools might use it. I thought I=E2=80=99d made a comment to say what =
n is, which I don=E2=80=99t see here. This can combine with that</span><u><=
/u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yes. we added some text on what &quot;n&quot; is.=C2=
=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;snip&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal">A major omission is discussion of expiry of new Tupl=
es without expiry times. If proactive you can (but don=E2=80=99t) discuss w=
hen supporting sets change.=C2=A0<u></u><u></u></p>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal">If reactive it=E2=80=99s rather a mess (a reason I d=
islike the reactive mechanism). When to discard? When to recreate? If depen=
dent on packet flow then that=E2=80=99s another interaction with IP
 to document - and implement.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The update of the the Multi-path routing set is desc=
ribed in section 8.6. The expiry timers are removed since -07 based on the =
comments received. One of the reasons is to be consistent
 with the OLSRv2 routing set, in which no expiry timer is used.=C2=A0<u></u=
><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Generally speaking, in proactive mode, it follows th=
e same mechanism as OLSRv2: when ever there is a need to update the OLSRv2 =
routing set, the multi-path routing set is updated.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In reactive mode, all the Multi-path routing tuples =
are removed when the &quot;topology graph&quot; is changed.=C2=A0 The new t=
uples are recreated &quot;on-demand&quot;.=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; OK, let=E2=80=99s think about that i=
n the reactive case. (Proactive is easy, but it needs to be said,
 which it isn=E2=80=99t.) You want a set, you generate it on demand. There =
is a change to the Topology Graph. So do you recalculate the set?
</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">No, at this point, we only clear the entire Multi-pa=
th Routing Set.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">If not then you introduce a stutter, as the =
packets are flowing and the set disappears and you need
 to trigger it again. </span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yes, it necessary to trigger the calculation again. =
But the time required is trivial, because this is only local: no additional=
 message exchange with other routers is required.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Which means monitoring for that throughout a=
 flow, not just at its start.
</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We don&#39;t actually have the concept &quot;flow&qu=
ot; in this extension. For each datagram, yes, it&#39;s necessary to check =
if a tuple exist or not. There is no much difference from checking the FIB =
for IP.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">If you do (recalculate the set when the grap=
h changes) how do you know when to stop calculating it?
 That depends on knowing when the flow stops.</span>=C2=A0<u></u><u></u></p=
>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">And =E2=80=9Cthe Topology Graph changes=E2=
=80=9D is more than is required - some changes to the graph would have
 no effect (for example the increase in metric of a link not being used). B=
ut it=E2=80=99s hard to specify.
</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For the moment, we simply take &quot;the topology gr=
aph changes&quot;, because even links that not used might matters: for exam=
ple, the decrease in metric of a not used metric that introduces a better p=
ath. =C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">It&#39;s true that it&#39;s possible that it&#39;s m=
ore than required and could be optimised in the future, but considering it&=
#39;s a reactive approach, I believe it&#39;s acceptable.=C2=A0<u></u><u></=
u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">On this point (which changes) some sort of p=
ermissive wording to indicate that you can avoid making
 changes when you know they don=E2=80=99t matter is probably right. The whe=
n do you stop calculating question is more important - and needs text discu=
ssing it.</span>=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal"><br>
You could when acting reactively forward by usual means in all cases while =
waiting.<br>
<br>
The actual packet forwarding by round-robin is an IP process, not this prot=
ocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP process, why=
 mandate exactly how it=E2=80=99s used?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Choosing which path to put in the source routing hea=
der is olsrv2-multipath specific, because there are multiple of them. Of co=
urse, using round-robin is not mandatory -- using
 other schedulers won&#39;t impact the compatibility. Actually, we put it a=
s one of the experiment points also:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<blockquote style=3D"border-style:none none none solid;border-left-color:rg=
b(204,204,204);border-left-width:1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm=
 5pt 4.8pt">
<p class=3D"MsoNormal"><i>=C2=A0Different path-selection schedulers.=C2=A0 =
By default, Round-Robin<br>
=C2=A0 =C2=A0 =C2=A0 scheduling is used to select a path to be used for dat=
agrams.=C2=A0 In<br>
=C2=A0 =C2=A0 =C2=A0 some scenarios, weighted scheduling can be considered:=
 for<br>
=C2=A0 =C2=A0 =C2=A0 example, the paths with lower metrics (i.e., higher qu=
ality) can<br>
=C2=A0 =C2=A0 =C2=A0 transfer more datagrams compared to paths with higher =
metrics.</i><u></u><u></u></p>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">CMD&gt; This is missing my point. It=E2=80=
=99s not the round-robin that matters, it=E2=80=99s that IP needs to do any=
thing.
 That=E2=80=99s what needs not to be buried. Putting together a clear =E2=
=80=9Cwhat IP needs to do=E2=80=9D section early on, perhaps in the applica=
bility section, is needed.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">=C2=A0</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">We added the following text in the applicability sta=
tement:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><i>MP-OLSRv2 supports two different, but interoperab=
le multi-path calculation approaches: proactive and reactive. In the proact=
ive calculation, the paths to all the destinations are calculated before ne=
eded. In the reactive calculation,
 only the paths to desired destination(s) are calculated on demand. The pro=
active approach requires more computational resources than the reactive one=
. The reactive approach requires the IP forwarding plan to trigger the mult=
i-path calculation.</i><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><i>MP-OLSRv2 forwards datagrams using the source rou=
ting header. As there are multiple paths to each destination, MP-OLSRv2 req=
uires the IP forwarding plan to be able to choose which source route to be =
put in the source routing header based
 on the path scheduler defined by MP-OLSRv2. For IPv4 networks, implementat=
ion of loose source routing is required following [RFC0791]. For IPv6 netwo=
rks, implementation of strict source routing is required following [RFC6554=
].</i><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">As usual, an updated draft is attached, in case need=
ed.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Jiazi<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt">
<div>
<p class=3D"MsoNormal">&lt;draft-ietf-manet-olsrv2-multipath.txt&gt;<u></u>=
<u></u></p>
</div>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
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<u></u></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><br>
</span><span lang=3D"EN-US" style=3D"font-size:8pt;font-family:Arial,sans-s=
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<br>_______________________________________________<br>
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From: Christopher Dearlove <christopher.dearlove@gmail.com>
In-Reply-To: <CAN1bDFyDamVA+NGj1XPEnF8ms13wCLxMRc7BW1_EOpuN7wL1WA@mail.gmail.com>
Date: Thu, 23 Jun 2016 22:31:29 +0100
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To: MANET IETF <manet@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/Z0JYLU3kP6HiMreNMAysDvpccIQ>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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What I didn=E2=80=99t say was that this (the RFC 6554 packet discard as =
a security feature) is part of the =E2=80=9Cwhat IP needs to do to =
support this protocol=E2=80=9D rather than being this protocol itself.

> On 23 Jun 2016, at 22:24, Jiazi YI <ietf@jiaziyi.com> wrote:
>=20
> Hi Chris, Stan:
>=20
> It's good point that we need to add some text about applying RFC6554 =
to MANET. We will make a proposal later.=20
>=20
> Regarding the issues of "referencing an RPL RFC", the problem we have =
with AODVv2 is very different from this.=20
>=20
> AODVv2 tries to reference RFC6551, which defines a set of metric types =
and it states=20
>=20
>      Low-Power and Lossy Networks (LLNs) have unique characteristics
>      compared with traditional wired and ad hoc networks that require =
the
>      specification of new routing metrics and constraints.=20
>=20
> as the first sentence in the abstract.=20
>=20
> For olsrv2-multipath, it has a reference to RFC6554, which defines a =
source routing header with address compression. Although it has "RPL" in =
its title, the format itself is protocol-neutral. I would imagine if =
someone want to implement DSR with IPv6, the RFC6554 would be a natural =
choice.=20
> As we will restrict the header to be used only in foo-protocol routing =
domain, there won't be any interoperability issue.=20
> We can, of course, proposal another RFC and ask for new "IPv6 Routing =
Type" to support source routing in IPv6 by just removing RPL-related =
clause in RFC6554. But it would be the same packet format, except the =
"IPv6 Routing Type" number --- personally, I don't think it's necessary. =
=20
>=20
> I'm having Alvaro in cc also, because it's kind of cross WG issue.=20
> Alvaro: Using source routing is not a rare case in IPv6. Only =
considering MANET WG, there is DSR, and AODVv2 (although it's now off =
the charter) also discussed possible extension with path accumulation.=20=

> Personally, I believe having a reference to RFC6554 should be OK, with =
some explanations in the draft. Your advice would be appreciated.=20
>=20
> cheers
>=20
> Jiazi
>=20
> On Thu, Jun 23, 2016 at 4:08 PM, Dearlove, Christopher (UK) =
<chris.dearlove@baesystems.com <mailto:chris.dearlove@baesystems.com>> =
wrote:
> I think this is really a comment for Jiazi. I=E2=80=99m not suggesting =
adding a reference to RFC 6554, that reference is already in the draft.
>=20
> =20
>=20
> I=E2=80=99m saying that if you reference RFC 6554, you=E2=80=99re =
referencing something that doesn=E2=80=99t apply unless and until you =
add some text to make it apply.
>=20
> =20
>=20
> Whether that is a terrible awful thing that should not be done (not my =
words - in fact I don=E2=80=99t recall commenting on that aspect of =
AODVv2) is up to the community to judge.
>=20
> =20
>=20
> But input from the people who have implemented this draft would be =
useful. Did they find RFC 6554 already in place? Already implemented and =
portable to in place? Had to write in from scratch? Didn=E2=80=99t =
actually use RFC 6554 but something else (e.g. deprecated RH0)? Only =
implemented for IPv4?
>=20
> =20
>=20
> --
>=20
> Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> =
__________________________________________________________________________=

>=20
> T:  +44 (0)1245 242194 <tel:%2B44%20%280%291245%20242194>  |  E: =
chris.dearlove@baesystems.com <mailto:chris.dearlove@baesystems.com>
>=20
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great =
Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai <http://www.baesystems.com/ai>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>=20
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>=20
> =20
>=20
> From: Ratliff, Stanley [mailto:sratliff@idirect.net =
<mailto:sratliff@idirect.net>]=20
> Sent: 23 June 2016 15:02
> To: Dearlove, Christopher (UK); MANET IETF
> Subject: RE: [manet] draft-ietf-olsrv2-multipath-09
>=20
> =20
>=20
> =20
>=20
> *** WARNING ***
>=20
> This message originates from outside our organisation, either from an =
external partner or the internet.
> Consider carefully whether you should click on any links, open any =
attachments or reply.
> For information regarding Red Flags that you can look out for in =
emails you receive, click here =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Red%20Flags.pdf>.
> If you feel the email is suspicious, please follow this process =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Dealing%20With%20Suspicious%20Emails.pdf>.
>=20
> Chris,
>=20
> =20
>=20
> I see your point on RFC 6554. But didn=E2=80=99t we *just* go through =
an exercise with AODVv2 where that draft attempted to reference a RPL =
RFC, and the consensus of the WG was that this was a =E2=80=9Cterrible, =
awful thing that should not be done=E2=80=9D?????
>=20
> =20
>=20
> Regards,
>=20
> Stan
>=20
> =20
>=20
> From: manet [mailto:manet-bounces@ietf.org =
<mailto:manet-bounces@ietf.org>] On Behalf Of Dearlove, Christopher (UK)
> Sent: Thursday, June 23, 2016 9:50 AM
> To: MANET IETF <manet@ietf.org <mailto:manet@ietf.org>>
> Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
>=20
> =20
>=20
> Digging further, there was a =
draft-reitzel-ipv4-source-routing-is-evil-00 that pointed out that IPv4 =
source routing had exactly the same problems as the deprecated RH0 IPv6 =
source routing, and recommended deprecating that. But the draft never =
preceded further. I don=E2=80=99t know why. I have seen it indicated =
that most operators drop such packets, so maybe it wasn=E2=80=99t felt =
necessary.
>=20
> =20
>=20
> As for why RFC 6554 avoids the RH0 problem, essentially it defines it =
away: =E2=80=9Ca RPL router drops datagrams that include multiple =
addresses assigned to any interfaces on that router to avoid forwarding =
loops=E2=80=9D Note that=E2=80=99s not as simple as dropping datagrams =
with duplicate addresses, it also includes dropping datagrams with two =
addresses of the same interface - which only that router can do.
>=20
> =20
>=20
> So, in order to use RFC 6554 source routing here, we need to (a) say =
that a required condition is that the MANET routers support RFC 6554, =
because that RFC itself only specifies this for RPL routers, and (b) =
that they must support the required features in particular the datagram =
suppression noted above.
>=20
> =20
>=20
> But, I wouldn=E2=80=99t expect a typical router currently to do this, =
because it won=E2=80=99t be =E2=80=9Can RPL router=E2=80=9D - here input =
from people who have done this hands on would be useful, did they have =
to add this functionality?
>=20
> =20
>=20
> And for IPv4, need (loose) source routing to be supported within the =
MANET, which again it may or may not be.
>=20
> =20
>=20
> (Note that RFC 6554 source routing isn=E2=80=99t the same as RH0 =
source routing, because RFC 6554 source routing includes compression.)
>=20
> =20
>=20
> --
>=20
> Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> =
__________________________________________________________________________=

>=20
> T:  +44 (0)1245 242194 <tel:%2B44%20%280%291245%20242194>  |  E: =
chris.dearlove@baesystems.com <mailto:chris.dearlove@baesystems.com>
>=20
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great =
Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai <http://www.baesystems.com/ai>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>=20
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>=20
> =20
>=20
> From: manet [mailto:manet-bounces@ietf.org =
<mailto:manet-bounces@ietf.org>] On Behalf Of Dearlove, Christopher (UK)
> Sent: 23 June 2016 10:39
> To: Jiazi YI; Christopher Dearlove
> Cc: MANET IETF
> Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
>=20
> =20
>=20
> =20
>=20
> *** WARNING ***
>=20
> This message originates from outside our organisation, either from an =
external partner or the internet.
> Consider carefully whether you should click on any links, open any =
attachments or reply.
> For information regarding Red Flags that you can look out for in =
emails you receive, click here =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Red%20Flags.pdf>.
> If you feel the email is suspicious, please follow this process =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Dealing%20With%20Suspicious%20Emails.pdf>.
>=20
> *** WARNING ***
> EXTERNAL EMAIL -- This message originates from outside our =
organization.
>=20
> =20
>=20
> Coincidentally, I was reading about IPv6 source routing, and the =
deprecation of RH0 in RFC 5095. RFC 6554 that you refer to claims to =
have resolved the security concerns that led to that deprecation. Part =
of that is that RFC 6554 is only defined as working in an RPL domain. =
Now that can probably be generalised to a MANET - but I don=E2=80=99t =
think you=E2=80=99ve done that, and so I think that needs doing.
>=20
> =20
>=20
> I=E2=80=99m then left wondering if the security threat described in =
RFC 5095 applies to IPv4 source routing. (I=E2=80=99m afraid I haven=E2=80=
=99t had time to dig into this, the coincidence has only just happened, =
and I thought better to get an incomplete question out.) RFC 5095 =
doesn=E2=80=99t discuss IPv4 at all, but the basic problem (repeating an =
address in a source route as an attack) would appear to still apply. I =
haven=E2=80=99t understood yet how RFC 6554 avoids this. It=E2=80=99s =
possible that RFC 5095 doesn=E2=80=99t consider IPv4 on the basis that =
most people have given up on it, or just it wasn=E2=80=99t of interest =
to the authors.
>=20
> =20
>=20
> At the minimum I think the draft needs to comment on extending RFC =
6554 to MANETs not RPL domains. Ideally (this may or may not cause added =
security considerations) someone with a better knowledge of this area =
(practical as well as theoretical) will comment on the above.
>=20
> =20
>=20
> --
>=20
> Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> =
__________________________________________________________________________=

>=20
> T:  +44 (0)1245 242194 <tel:%2B44%20%280%291245%20242194>  |  E: =
chris.dearlove@baesystems.com <mailto:chris.dearlove@baesystems.com>
>=20
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great =
Baddow, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai <http://www.baesystems.com/ai>
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
>=20
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>=20
> =20
>=20
> From: yi.jiazi@gmail.com <mailto:yi.jiazi@gmail.com> =
[mailto:yi.jiazi@gmail.com <mailto:yi.jiazi@gmail.com>] On Behalf Of =
Jiazi YI
> Sent: 21 June 2016 22:24
> To: Christopher Dearlove
> Cc: Dearlove, Christopher (UK); MANET IETF
> Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
>=20
> =20
>=20
> =20
>=20
> *** WARNING ***
>=20
> This message originates from outside our organisation, either from an =
external partner or the internet.
> Consider carefully whether you should click on any links, open any =
attachments or reply.
> For information regarding Red Flags that you can look out for in =
emails you receive, click here =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Red%20Flags.pdf>.
> If you feel the email is suspicious, please follow this process =
<http://intranet.ent.baesystems.com/howwework/security/spotlights/Document=
s/Dealing%20With%20Suspicious%20Emails.pdf>.
>=20
> We will add some text to make it more precise.=20
>=20
> =20
>=20
> best
>=20
> =20
>=20
> Jiazi
>=20
> =20
>=20
> On Tue, Jun 21, 2016 at 1:02 AM, Christopher Dearlove =
<christopher.dearlove@gmail.com <mailto:christopher.dearlove@gmail.com>> =
wrote:
>=20
> "Because the encoded blocks are unordered for FEC" is, at best, only =
applicable to some FEC methods, it's definitely not universal.
>=20
> -- =20
>=20
> Christopher Dearlove
>=20
>=20
> On 20 Jun 2016, at 23:41, Jiazi YI <ietf@jiaziyi.com =
<mailto:ietf@jiaziyi.com>> wrote:
>=20
> Hi,=20
>=20
> =20
>=20
> On Mon, Jun 20, 2016 at 5:56 PM, Dearlove, Christopher (UK) =
<chris.dearlove@baesystems.com <mailto:chris.dearlove@baesystems.com>> =
wrote:
>=20
> Comments below.
>=20
> =20
>=20
> Short version, still some points I think can be improved. Down to one =
sticking point, on deciding on how to handle changes to, and cessation =
of, the reactive set. (Longer text below.) I think this is a real issue. =
Take a look at what you do in your implementation - now see if someone =
could work out to do that from the text. I don=E2=80=99t think they can.
>=20
> =20
>=20
> =20
>=20
> we clarified this in the draft. Please check the our detailed reply =
below.=20
>=20
> =20
>=20
> <snip>=20
>=20
>=20
> Page 5, second bullet. How does FEC help with packet re-ordering?
>=20
> =20
>=20
> Normally, the packets are coded in different "blocks" and those blocks =
are transmitted in different paths. The arriving order of those "blocks" =
is less important.=20
>=20
> =20
>=20
> CMD> I still don=E2=80=99t see how it helps with packet re-ordering.
>=20
> =20
>=20
> When FEC is applied, the encoder takes one or several packets and =
produce several coded blocks (denoted block-1, block-2, ... block-n). =
Those blocks are forwarded as IP datagrams in the disjoint paths. =
Because the encoded blocks are unordered for FEC, the arriving order of =
the encoded blocks of the same packet(s) doesn't really matter.=20
>=20
> =20
>=20
> =20
>=20
> <snip>
>=20
> Page 6, first paragraph. I still disagree with characterising as low =
data rate links. At most the protocol multiplies capacity by a small =
factor, not the orders pf magnitude that link capacities span.
>=20
> =20
>=20
> We won't claim that there will be orders of magnitude that link =
capacities span, but it would be beneficial to have aggregated =
throughput and load balancing.=20
>=20
> =20
>=20
> So what do you think of:
>=20
> =20
>=20
> MP-OLSRv2 is designed for networks with dynamic topology by avoiding =
single route failure. It can also provide higher aggregated throughput =
and load balancing, which is beneficial for low data rate links. =20
>=20
> =20
>=20
> CMD> Still not convinced by the phrase low data rate links. The issues =
are ones of load relative to network capacity, and in particular if =
there are underutilised parts of the network. Plus of course a =
redundancy issue if packets do not all need to arrive. These can all =
occur in high data rate networks as much as low data rate ones.
>=20
> =20
>=20
> =20
>=20
> It makes sense. I'm OK with removing the text related to low data rate =
links.=20
>=20
> =20
>=20
> <snip>
>=20
> =20
>=20
> PT_=E2=80=A6 What about hop count? Elsewhere in OLSRv2 we record that =
as well (e.g Routing Set).
>=20
> =20
>=20
> Actually, the number of the items in the array PT_address[1...n] =
already gives the hop count -- is it necessary to repeat the information =
with an additional field? It is not used anyways.=20
>=20
> =20
>=20
> CMD> That it=E2=80=99s there could be called out. It gets used in =
OLSRv2 as a suggested tie-breaker, and some tools might use it. I =
thought I=E2=80=99d made a comment to say what n is, which I don=E2=80=99t=
 see here. This can combine with that
>=20
> =20
>=20
> Yes. we added some text on what "n" is.=20
>=20
> =20
>=20
> <snip>
>=20
> A major omission is discussion of expiry of new Tuples without expiry =
times. If proactive you can (but don=E2=80=99t) discuss when supporting =
sets change.=20
>=20
> If reactive it=E2=80=99s rather a mess (a reason I dislike the =
reactive mechanism). When to discard? When to recreate? If dependent on =
packet flow then that=E2=80=99s another interaction with IP to document =
- and implement.
>=20
> =20
>=20
> The update of the the Multi-path routing set is described in section =
8.6. The expiry timers are removed since -07 based on the comments =
received. One of the reasons is to be consistent with the OLSRv2 routing =
set, in which no expiry timer is used.=20
>=20
> Generally speaking, in proactive mode, it follows the same mechanism =
as OLSRv2: when ever there is a need to update the OLSRv2 routing set, =
the multi-path routing set is updated.=20
>=20
> In reactive mode, all the Multi-path routing tuples are removed when =
the "topology graph" is changed.  The new tuples are recreated =
"on-demand".=20
>=20
> =20
>=20
> CMD> OK, let=E2=80=99s think about that in the reactive case. =
(Proactive is easy, but it needs to be said, which it isn=E2=80=99t.) =
You want a set, you generate it on demand. There is a change to the =
Topology Graph. So do you recalculate the set?
>=20
> =20
>=20
> No, at this point, we only clear the entire Multi-path Routing Set.=20
>=20
> =20
>=20
> If not then you introduce a stutter, as the packets are flowing and =
the set disappears and you need to trigger it again.
>=20
> =20
>=20
> Yes, it necessary to trigger the calculation again. But the time =
required is trivial, because this is only local: no additional message =
exchange with other routers is required.=20
>=20
> =20
>=20
> Which means monitoring for that throughout a flow, not just at its =
start.
>=20
> =20
>=20
> We don't actually have the concept "flow" in this extension. For each =
datagram, yes, it's necessary to check if a tuple exist or not. There is =
no much difference from checking the FIB for IP.=20
>=20
> =20
>=20
> If you do (recalculate the set when the graph changes) how do you know =
when to stop calculating it? That depends on knowing when the flow =
stops.=20
>=20
> And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more than is =
required - some changes to the graph would have no effect (for example =
the increase in metric of a link not being used). But it=E2=80=99s hard =
to specify.
>=20
> =20
>=20
> For the moment, we simply take "the topology graph changes", because =
even links that not used might matters: for example, the decrease in =
metric of a not used metric that introduces a better path. =20
>=20
> It's true that it's possible that it's more than required and could be =
optimised in the future, but considering it's a reactive approach, I =
believe it's acceptable.=20
>=20
> =20
>=20
> On this point (which changes) some sort of permissive wording to =
indicate that you can avoid making changes when you know they don=E2=80=99=
t matter is probably right. The when do you stop calculating question is =
more important - and needs text discussing it.=20
>=20
> =20
>=20
>=20
> You could when acting reactively forward by usual means in all cases =
while waiting.
>=20
> The actual packet forwarding by round-robin is an IP process, not this =
protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP =
process, why mandate exactly how it=E2=80=99s used?
>=20
> =20
>=20
> Choosing which path to put in the source routing header is =
olsrv2-multipath specific, because there are multiple of them. Of =
course, using round-robin is not mandatory -- using other schedulers =
won't impact the compatibility. Actually, we put it as one of the =
experiment points also:
>=20
> =20
>=20
>  Different path-selection schedulers.  By default, Round-Robin
>       scheduling is used to select a path to be used for datagrams.  =
In
>       some scenarios, weighted scheduling can be considered: for
>       example, the paths with lower metrics (i.e., higher quality) can
>       transfer more datagrams compared to paths with higher metrics.
>=20
> =20
>=20
> CMD> This is missing my point. It=E2=80=99s not the round-robin that =
matters, it=E2=80=99s that IP needs to do anything. That=E2=80=99s what =
needs not to be buried. Putting together a clear =E2=80=9Cwhat IP needs =
to do=E2=80=9D section early on, perhaps in the applicability section, =
is needed.
>=20
> =20
>=20
> =20
>=20
> We added the following text in the applicability statement:
>=20
> =20
>=20
> MP-OLSRv2 supports two different, but interoperable multi-path =
calculation approaches: proactive and reactive. In the proactive =
calculation, the paths to all the destinations are calculated before =
needed. In the reactive calculation, only the paths to desired =
destination(s) are calculated on demand. The proactive approach requires =
more computational resources than the reactive one. The reactive =
approach requires the IP forwarding plan to trigger the multi-path =
calculation.
>=20
> =20
>=20
> MP-OLSRv2 forwards datagrams using the source routing header. As there =
are multiple paths to each destination, MP-OLSRv2 requires the IP =
forwarding plan to be able to choose which source route to be put in the =
source routing header based on the path scheduler defined by MP-OLSRv2. =
For IPv4 networks, implementation of loose source routing is required =
following [RFC0791]. For IPv6 networks, implementation of strict source =
routing is required following [RFC6554].
>=20
> =20
>=20
> As usual, an updated draft is attached, in case needed.=20
>=20
> =20
>=20
> regards
>=20
> =20
>=20
> Jiazi
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> <draft-ietf-manet-olsrv2-multipath.txt>
>=20
> =20
>=20
> ********************************************************************
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>=20
>=20
> _____________________________________________________
> This electronic message and any files transmitted with it contains
> information from iDirect, which may be privileged, proprietary
> and/or confidential. It is intended solely for the use of the =
individual
> or entity to whom they are addressed. If you are not the original
> recipient or the person responsible for delivering the email to the
> intended recipient, be advised that you have received this email
> in error, and that any use, dissemination, forwarding, printing, or
> copying of this email is strictly prohibited. If you received this =
email
> in error, please delete it and immediately notify the sender.
> _____________________________________________________
>=20
>=20
> _______________________________________________
> manet mailing list
> manet@ietf.org <mailto:manet@ietf.org>
> https://www.ietf.org/mailman/listinfo/manet =
<https://www.ietf.org/mailman/listinfo/manet>
>=20
>=20
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet


--Apple-Mail=_6786D6BF-7CB7-4429-A9DB-1E7A7FF0CC54
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div class=3D"">What I didn=E2=80=99t say was that this (the =
RFC 6554 packet discard as a security feature) is part of the =E2=80=9Cwha=
t IP needs to do to support this protocol=E2=80=9D rather than being =
this protocol itself.</div><br class=3D""><div><blockquote type=3D"cite" =
class=3D""><div class=3D"">On 23 Jun 2016, at 22:24, Jiazi YI &lt;<a =
href=3D"mailto:ietf@jiaziyi.com" class=3D"">ietf@jiaziyi.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div dir=3D"ltr" class=3D"">Hi Chris, Stan:<div class=3D""><br =
class=3D""></div><div class=3D"">It's good point that we need to add =
some text about applying RFC6554 to MANET. We will make a proposal =
later.&nbsp;</div><div class=3D""><br class=3D""></div><div =
class=3D"">Regarding the issues of "referencing an RPL RFC", the problem =
we have with AODVv2 is very different from this.&nbsp;</div><div =
class=3D""><br class=3D""></div><div class=3D"">AODVv2 tries to =
reference RFC6551, which defines a set of metric types and it =
states&nbsp;</div><div class=3D""><br class=3D""></div><div class=3D""><i =
class=3D"">&nbsp; &nbsp; &nbsp;Low-Power and Lossy Networks (LLNs) have =
unique characteristics</i><div class=3D""><i class=3D"">&nbsp; &nbsp; =
&nbsp;compared with traditional wired and ad hoc networks that require =
the</i></div><div class=3D""><i class=3D"">&nbsp; &nbsp; =
&nbsp;specification of new routing metrics and =
constraints.&nbsp;</i></div><div class=3D"gmail_extra"><br =
class=3D""></div><div class=3D"gmail_extra">as the first sentence in the =
abstract.&nbsp;</div><div class=3D"gmail_extra"><br class=3D""></div><div =
class=3D"gmail_extra">For olsrv2-multipath, it has a reference to =
RFC6554, which defines a source routing header with address compression. =
Although it has "RPL" in its title, the format itself is =
protocol-neutral. I would imagine if someone want to implement DSR with =
IPv6, the RFC6554 would be a natural choice.&nbsp;</div><div =
class=3D"gmail_extra">As we will restrict the header to be used only in =
foo-protocol routing domain, there won't be any interoperability =
issue.&nbsp;</div><div class=3D"gmail_extra">We can, of course, proposal =
another RFC and ask for new "IPv6 Routing Type" to support source =
routing in IPv6 by just removing RPL-related clause in RFC6554. But it =
would be the same packet format, except the "IPv6 Routing Type" number =
--- personally, I don't think it's necessary. &nbsp;</div><div =
class=3D"gmail_extra"><br class=3D""></div><div class=3D"gmail_extra">I'm =
having Alvaro in cc also, because it's kind of cross WG =
issue.&nbsp;</div><div class=3D"gmail_extra">Alvaro: Using source =
routing is not a rare case in IPv6. Only considering MANET WG, there is =
DSR, and AODVv2 (although it's now off the charter) also discussed =
possible extension with path accumulation.&nbsp;</div><div =
class=3D"gmail_extra">Personally, I believe having a reference to =
RFC6554 should be OK, with some explanations in the draft. Your advice =
would be appreciated.&nbsp;</div><div class=3D"gmail_extra"><br =
class=3D""></div><div class=3D"gmail_extra">cheers</div><div =
class=3D"gmail_extra"><br class=3D""></div><div =
class=3D"gmail_extra">Jiazi</div><div class=3D"gmail_extra"><br =
class=3D""><div class=3D"gmail_quote">On Thu, Jun 23, 2016 at 4:08 PM, =
Dearlove, Christopher (UK) <span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank" =
class=3D"">chris.dearlove@baesystems.com</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left=
-style:solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple" class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">I think this is really a comment for Jiazi. I=E2=80=99m =
not suggesting adding a reference to RFC 6554, that reference is already =
in the draft.<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">I=E2=80=99m saying that if you reference RFC 6554, =
you=E2=80=99re referencing something that doesn=E2=80=99t apply unless =
and until you add some text to make it apply.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Whether that is a terrible awful thing that should not be =
done (not my words - in fact I don=E2=80=99t recall commenting on that =
aspect of AODVv2) is up to the community
 to judge.<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">But input from the people who have implemented this draft =
would be useful. Did they find RFC 6554 already in place? Already =
implemented and portable to in place?
 Had to write in from scratch? Didn=E2=80=99t actually use RFC 6554 but =
something else (e.g. deprecated RH0)? Only implemented for IPv4?<u =
class=3D""></u><u class=3D""></u></span></p><span class=3D""><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D""><p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b =
class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">--
<u class=3D""></u><u class=3D""></u></span></b></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><b class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">Christopher Dearlove<br class=3D"">
Senior Principal Engineer<br class=3D"">
BAE Systems Applied Intelligence Laboratories<br class=3D"">
</span></b><b class=3D""><span =
style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(190,190,190=
)" =
class=3D"">_______________________________________________________________=
___________<br class=3D"">
</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><b class=3D""><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">T</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">: &nbsp;<a href=3D"tel:%2B44%20%280%291245%20242194" =
value=3D"+441245242194" target=3D"_blank" class=3D"">+44 (0)1245 =
242194</a> &nbsp;| &nbsp;<b class=3D"">E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank" =
class=3D"">chris.dearlove@baesystems.com</a><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence, Chelmsford Technology =
Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br class=3D"">
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank" =
class=3D""><span style=3D"color:rgb(58,139,146)" =
class=3D"">www.baesystems.com/ai</span></a><u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence Limited<br class=3D"">
Registered in England &amp; Wales No: 01337451<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">Registered Office: Surrey Research Park, Guildford, Surrey, =
GU2 7YP<u class=3D""></u><u class=3D""></u></span></p>
</div><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p>
</span><div class=3D"">
<div style=3D"border-style:solid none =
none;border-top-color:rgb(181,196,223);border-top-width:1pt;padding:3pt =
0cm 0cm" class=3D""><p class=3D"MsoNormal"><b class=3D""><span =
lang=3D"EN-US" style=3D"font-size:10pt;font-family:Tahoma,sans-serif" =
class=3D"">From:</span></b><span lang=3D"EN-US" =
style=3D"font-size:10pt;font-family:Tahoma,sans-serif" class=3D""> =
Ratliff, Stanley [mailto:<a href=3D"mailto:sratliff@idirect.net" =
target=3D"_blank" class=3D"">sratliff@idirect.net</a>]
<br class=3D"">
<b class=3D"">Sent:</b> 23 June 2016 15:02<br class=3D"">
<b class=3D"">To:</b> Dearlove, Christopher (UK); MANET IETF<br =
class=3D"">
<b class=3D"">Subject:</b> RE: [manet] draft-ietf-olsrv2-multipath-09<u =
class=3D""></u><u class=3D""></u></span></p>
</div>
</div><div class=3D""><div class=3D""><p class=3D"MsoNormal"><u =
class=3D""></u>&nbsp;<u class=3D""></u></p>
<div style=3D"border:1pt solid black;padding:2pt" class=3D""><p =
class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><span lang=3D"EN-US" =
style=3D"font-family: Arial, sans-serif;" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><b class=3D""><span =
lang=3D"EN-US" =
style=3D"font-size:15pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"=
 class=3D"">*** WARNING ***<u class=3D""></u><u =
class=3D""></u></span></b></p>
</div>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"margin-bottom:12pt;text-align:center;background-color:white">
<em class=3D""><span lang=3D"EN-US" =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D"">This message originates from outside our organisation, =
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<em class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">For=
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)" class=3D""> that you can look
 out for in emails you receive, click <a =
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ocuments/Red%20Flags.pdf" target=3D"_blank" class=3D"">
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)" class=3D""><u class=3D""></u><u class=3D""></u></span></p>
</div>
</div><p class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Chris,<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">I see your point on RFC 6554. But didn=E2=80=99t we *<b =
class=3D"">just</b>* go through an exercise with AODVv2 where that draft =
attempted to reference a RPL RFC,
 and the consensus of the WG was that this was a =E2=80=9Cterrible, =
awful thing that should not be done=E2=80=9D?????
<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Regards,<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Stan<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div style=3D"border-style:none none none =
solid;border-left-color:blue;border-left-width:1.5pt;padding:0cm 0cm 0cm =
4pt" class=3D"">
<div class=3D"">
<div style=3D"border-style:solid none =
none;border-top-color:rgb(225,225,225);border-top-width:1pt;padding:3pt =
0cm 0cm" class=3D""><p class=3D"MsoNormal"><b class=3D""><span =
lang=3D"EN-US" style=3D"font-size:11pt;font-family:Calibri,sans-serif" =
class=3D"">From:</span></b><span lang=3D"EN-US" =
style=3D"font-size:11pt;font-family:Calibri,sans-serif" class=3D""> =
manet [<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank" =
class=3D"">mailto:manet-bounces@ietf.org</a>]
<b class=3D"">On Behalf Of </b>Dearlove, Christopher (UK)<br class=3D"">
<b class=3D"">Sent:</b> Thursday, June 23, 2016 9:50 AM<br class=3D"">
<b class=3D"">To:</b> MANET IETF &lt;<a href=3D"mailto:manet@ietf.org" =
target=3D"_blank" class=3D"">manet@ietf.org</a>&gt;<br class=3D"">
<b class=3D"">Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u =
class=3D""></u><u class=3D""></u></span></p>
</div>
</div><p class=3D"MsoNormal"><span lang=3D"EN-US" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Digging further, there was a =
draft-reitzel-ipv4-source-routing-is-evil-00 that pointed out that IPv4 =
source routing had exactly the same problems as the deprecated
 RH0 IPv6 source routing, and recommended deprecating that. But the =
draft never preceded further. I don=E2=80=99t know why. I have seen it =
indicated that most operators drop such packets, so maybe it wasn=E2=80=99=
t felt necessary.<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">As for why RFC 6554 avoids the RH0 problem, essentially it =
defines it away: =E2=80=9Ca RPL router drops datagrams that include =
multiple addresses assigned to any interfaces
 on that router to avoid forwarding loops=E2=80=9D Note that=E2=80=99s =
not as simple as dropping datagrams with duplicate addresses, it also =
includes dropping datagrams with two addresses of the same interface - =
which only that router can do.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">So, in order to use RFC 6554 source routing here, we need =
to (a) say that a required condition is that the MANET routers support =
RFC 6554, because that RFC
 itself only specifies this for RPL routers, and (b) that they must =
support the required features in particular the datagram suppression =
noted above.<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">But, I wouldn=E2=80=99t expect a typical router currently =
to do this, because it won=E2=80=99t be =E2=80=9Can RPL router=E2=80=9D =
- here input from people who have done this hands on would
 be useful, did they have to add this functionality?<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">And for IPv4, need (loose) source routing to be supported =
within the MANET, which again it may or may not be.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">(Note that RFC 6554 source routing isn=E2=80=99t the same =
as RH0 source routing, because RFC 6554 source routing includes =
compression.)<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D""><p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b =
class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">--
<u class=3D""></u><u class=3D""></u></span></b></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><b class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">Christopher Dearlove<br class=3D"">
Senior Principal Engineer<br class=3D"">
BAE Systems Applied Intelligence Laboratories<br class=3D"">
</span></b><b class=3D""><span =
style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(190,190,190=
)" =
class=3D"">_______________________________________________________________=
___________<br class=3D"">
</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><b class=3D""><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">T</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">: &nbsp;<a href=3D"tel:%2B44%20%280%291245%20242194" =
value=3D"+441245242194" target=3D"_blank" class=3D"">+44 (0)1245 =
242194</a> &nbsp;| &nbsp;<b class=3D"">E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank" =
class=3D"">chris.dearlove@baesystems.com</a><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence, Chelmsford Technology =
Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br class=3D"">
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank" =
class=3D""><span style=3D"color:rgb(58,139,146)" =
class=3D"">www.baesystems.com/ai</span></a><u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence Limited<br class=3D"">
Registered in England &amp; Wales No: 01337451<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">Registered Office: Surrey Research Park, Guildford, Surrey, =
GU2 7YP<u class=3D""></u><u class=3D""></u></span></p>
</div><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D"">
<div style=3D"border-style:solid none =
none;border-top-color:rgb(181,196,223);border-top-width:1pt;padding:3pt =
0cm 0cm" class=3D""><p class=3D"MsoNormal"><b class=3D""><span =
lang=3D"EN-US" style=3D"font-size:10pt;font-family:Tahoma,sans-serif" =
class=3D"">From:</span></b><span lang=3D"EN-US" =
style=3D"font-size:10pt;font-family:Tahoma,sans-serif" class=3D""> manet =
[<a href=3D"mailto:manet-bounces@ietf.org" target=3D"_blank" =
class=3D"">mailto:manet-bounces@ietf.org</a>]
<b class=3D"">On Behalf Of </b>Dearlove, Christopher (UK)<br class=3D"">
<b class=3D"">Sent:</b> 23 June 2016 10:39<br class=3D"">
<b class=3D"">To:</b> Jiazi YI; Christopher Dearlove<br class=3D"">
<b class=3D"">Cc:</b> MANET IETF<br class=3D"">
<b class=3D"">Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u =
class=3D""></u><u class=3D""></u></span></p>
</div>
</div><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
<div style=3D"border:1pt solid black;padding:2pt" class=3D""><p =
class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><span =
style=3D"font-family: Arial, sans-serif;" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><b class=3D""><span =
style=3D"font-size:15pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"=
 class=3D"">*** WARNING ***<u class=3D""></u><u =
class=3D""></u></span></b></p>
</div>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"margin-bottom:12pt;text-align:center;background-color:white">
<em class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D"">This message originates from outside our organisation, =
either from an external partner or the internet.</span></em><i =
class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" =
class=3D"">Consider carefully whether you should click on any links, =
open any attachments or reply.</span></em><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">For=
 information regarding </span>
</em></span></i><strong class=3D""><i class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:red" =
class=3D"">Red Flags</span></i></strong><em class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""> that you can look out for in emails you receive,
 click <a =
href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/D=
ocuments/Red%20Flags.pdf" target=3D"_blank" class=3D"">
here</a>.</span></em><i class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">If =
you feel the email is suspicious, please follow
<a =
href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/D=
ocuments/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank" =
class=3D"">
this process</a>.</span></em></span></i><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><u class=3D""></u><u class=3D""></u></span></p>
</div>
</div>
<div style=3D"border:1pt solid windowtext;padding:1pt 4pt" class=3D""><p =
class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span =
style=3D"font-family:Arial,sans-serif" class=3D"">*<strong =
class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">**
</span></strong></span><strong class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif" class=3D"">WARNING
</span></strong><strong class=3D""><span =
style=3D"font-family:Arial,sans-serif" class=3D"">***</span></strong><span=
 style=3D"font-size:8.5pt;font-family:Arial,sans-serif" class=3D""><br =
class=3D"">
</span><span style=3D"font-size:10pt;font-family:Arial,sans-serif" =
class=3D"">EXTERNAL EMAIL -- This message originates from outside our =
organization</span><span =
style=3D"font-size:8.5pt;font-family:Arial,sans-serif" =
class=3D"">.</span><u class=3D""></u><u class=3D""></u></p>
</div><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Coincidentally, I was reading about IPv6 source routing, =
and the deprecation of RH0 in RFC 5095. RFC 6554 that you refer to =
claims to have resolved the security
 concerns that led to that deprecation. Part of that is that RFC 6554 is =
only defined as working in an RPL domain. Now that can probably be =
generalised to a MANET - but I don=E2=80=99t think you=E2=80=99ve done =
that, and so I think that needs doing.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">I=E2=80=99m then left wondering if the security threat =
described in RFC 5095 applies to IPv4 source routing. (I=E2=80=99m =
afraid I haven=E2=80=99t had time to dig into this, the coincidence
 has only just happened, and I thought better to get an incomplete =
question out.) RFC 5095 doesn=E2=80=99t discuss IPv4 at all, but the =
basic problem (repeating an address in a source route as an attack) =
would appear to still apply. I haven=E2=80=99t understood yet how RFC
 6554 avoids this. It=E2=80=99s possible that RFC 5095 doesn=E2=80=99t =
consider IPv4 on the basis that most people have given up on it, or just =
it wasn=E2=80=99t of interest to the authors.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">At the minimum I think the draft needs to comment on =
extending RFC 6554 to MANETs not RPL domains. Ideally (this may or may =
not cause added security considerations)
 someone with a better knowledge of this area (practical as well as =
theoretical) will comment on the above.<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">--
<u class=3D""></u><u class=3D""></u></span></b></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><b class=3D""><span =
style=3D"font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,126,126)"=
 class=3D"">Christopher Dearlove<br class=3D"">
Senior Principal Engineer<br class=3D"">
BAE Systems Applied Intelligence Laboratories<br class=3D"">
</span></b><b class=3D""><span =
style=3D"font-size:11pt;font-family:Arial,sans-serif;color:rgb(190,190,190=
)" =
class=3D"">_______________________________________________________________=
___________<br class=3D"">
</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><b class=3D""><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">T</span></b><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(125,125,125)=
" class=3D"">: &nbsp;<a href=3D"tel:%2B44%20%280%291245%20242194" =
value=3D"+441245242194" target=3D"_blank" class=3D"">+44 (0)1245 =
242194</a> &nbsp;| &nbsp;<b class=3D"">E:
</b><a href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank" =
class=3D"">chris.dearlove@baesystems.com</a><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(0,0,126)" =
class=3D""><br class=3D"">
</span><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence, Chelmsford Technology =
Park, Great Baddow, Chelmsford, Essex CM2 8HN.<br class=3D"">
<a href=3D"http://www.baesystems.com/ai" target=3D"_blank" =
class=3D""><span style=3D"color:rgb(58,139,146)" =
class=3D"">www.baesystems.com/ai</span></a><u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">BAE Systems Applied Intelligence Limited<br class=3D"">
Registered in England &amp; Wales No: 01337451<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal" =
style=3D"margin-bottom:12pt"><span =
style=3D"font-size:8pt;font-family:Arial,sans-serif;color:rgb(58,139,146)"=
 class=3D"">Registered Office: Surrey Research Park, Guildford, Surrey, =
GU2 7YP<u class=3D""></u><u class=3D""></u></span></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D""><u class=3D""></u>&nbsp;<u class=3D""></u></span></p><p =
class=3D"MsoNormal"><b class=3D""><span lang=3D"EN-US" =
style=3D"font-size:10pt;font-family:Tahoma,sans-serif" =
class=3D"">From:</span></b><span lang=3D"EN-US" =
style=3D"font-size:10pt;font-family:Tahoma,sans-serif" class=3D"">
<a href=3D"mailto:yi.jiazi@gmail.com" target=3D"_blank" =
class=3D"">yi.jiazi@gmail.com</a> [<a href=3D"mailto:yi.jiazi@gmail.com" =
target=3D"_blank" class=3D"">mailto:yi.jiazi@gmail.com</a>]
<b class=3D"">On Behalf Of </b>Jiazi YI<br class=3D"">
<b class=3D"">Sent:</b> 21 June 2016 22:24<br class=3D"">
<b class=3D"">To:</b> Christopher Dearlove<br class=3D"">
<b class=3D"">Cc:</b> Dearlove, Christopher (UK); MANET IETF<br =
class=3D"">
<b class=3D"">Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<u =
class=3D""></u><u class=3D""></u></span></p><p class=3D"MsoNormal"><u =
class=3D""></u>&nbsp;<u class=3D""></u></p>
<div style=3D"border:1pt solid black;padding:2pt" class=3D""><p =
class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><span =
style=3D"font-family: Arial, sans-serif;" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></span></p>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"text-align:center;background-color:white"><b class=3D""><span =
style=3D"font-size:15pt;font-family:Arial,sans-serif;color:rgb(51,57,114)"=
 class=3D"">*** WARNING ***<u class=3D""></u><u =
class=3D""></u></span></b></p>
</div>
<div class=3D""><p class=3D"MsoNormal" align=3D"center" =
style=3D"margin-bottom:12pt;text-align:center;background-color:white">
<em class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D"">This message originates from outside our organisation, =
either from an external partner or the internet.</span></em><i =
class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" =
class=3D"">Consider carefully whether you should click on any links, =
open any attachments or reply.</span></em><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">For=
 information regarding </span>
</em></span></i><strong class=3D""><i class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:red" =
class=3D"">Red Flags</span></i></strong><em class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""> that you can look out for in emails you receive,
 click <a =
href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/D=
ocuments/Red%20Flags.pdf" target=3D"_blank" class=3D"">
here</a>.</span></em><i class=3D""><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><br class=3D"">
<em class=3D""><span style=3D"font-family:Arial,sans-serif" class=3D"">If =
you feel the email is suspicious, please follow
<a =
href=3D"http://intranet.ent.baesystems.com/howwework/security/spotlights/D=
ocuments/Dealing%20With%20Suspicious%20Emails.pdf" target=3D"_blank" =
class=3D"">
this process</a>.</span></em></span></i><span =
style=3D"font-size:10.5pt;font-family:Arial,sans-serif;color:rgb(51,57,114=
)" class=3D""><u class=3D""></u><u class=3D""></u></span></p>
</div>
</div>
<div class=3D""><p class=3D"MsoNormal">We will add some text to make it =
more precise.&nbsp;<u class=3D""></u><u class=3D""></u></p>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">best<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Jiazi<u class=3D""></u><u =
class=3D""></u></p>
</div>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
<div class=3D""><p class=3D"MsoNormal">On Tue, Jun 21, 2016 at 1:02 AM, =
Christopher Dearlove &lt;<a href=3D"mailto:christopher.dearlove@gmail.com"=
 target=3D"_blank" class=3D"">christopher.dearlove@gmail.com</a>&gt; =
wrote:<u class=3D""></u><u class=3D""></u></p>
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal">"Because the encoded blocks are =
unordered for FEC" is, at best, only applicable to some FEC methods, =
it's definitely not universal.<br class=3D"">
<br class=3D"">
-- &nbsp;<u class=3D""></u><u class=3D""></u></p>
<div class=3D""><p class=3D"MsoNormal">Christopher Dearlove<u =
class=3D""></u><u class=3D""></u></p>
</div>
</div>
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br =
class=3D"">
On 20 Jun 2016, at 23:41, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi.com"=
 target=3D"_blank" class=3D"">ietf@jiaziyi.com</a>&gt; wrote:<u =
class=3D""></u><u class=3D""></u></p>
</div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt" class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal">Hi,&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
<div class=3D""><p class=3D"MsoNormal">On Mon, Jun 20, 2016 at 5:56 PM, =
Dearlove, Christopher (UK) &lt;<a =
href=3D"mailto:chris.dearlove@baesystems.com" target=3D"_blank" =
class=3D"">chris.dearlove@baesystems.com</a>&gt; wrote:<u =
class=3D""></u><u class=3D""></u></p>
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Comments below.</span><u class=3D""></u><u =
class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Short version, still some points I think can be improved. =
Down to one sticking point, on deciding
 on how to handle changes to, and cessation of, the reactive set. =
(Longer text below.) I think this is a real issue. Take a look at what =
you do in your implementation - now see if someone could work out to do =
that from the text. I don=E2=80=99t think they can.</span><u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">we clarified this in the draft. =
Please check the our detailed reply below.&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&lt;snip&gt;&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal"><br class=3D"">
Page 5, second bullet. How does FEC help with packet re-ordering?<u =
class=3D""></u><u class=3D""></u></p>
</blockquote>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Normally, the packets are coded =
in different "blocks" and those blocks are transmitted in different =
paths. The arriving order of those "blocks" is less important.&nbsp;<u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">CMD&gt; I still don=E2=80=99t see how it helps with packet =
re-ordering.</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">When FEC is applied, the encoder =
takes one or several packets and produce several coded blocks (denoted =
block-1, block-2, ... block-n). Those blocks are forwarded as IP =
datagrams in the disjoint paths. Because the encoded blocks are =
unordered
 for FEC, the arriving order of the encoded blocks of the same packet(s) =
doesn't really matter.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&lt;snip&gt;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal">Page 6, first paragraph. I still disagree with =
characterising as low data rate links. At most the protocol multiplies =
capacity by a small factor, not the orders pf magnitude that
 link capacities span.<u class=3D""></u><u class=3D""></u></p>
</blockquote>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">We won't claim that there will be =
orders of magnitude that link capacities span, but it would be =
beneficial to have aggregated throughput and load balancing.&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">So what do you think of:<u =
class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">MP-OLSRv2 is designed for =
networks with dynamic topology by avoiding single route failure. It can =
also provide higher aggregated throughput and load balancing, which is =
beneficial
 for low data rate links. &nbsp;<u class=3D""></u><u class=3D""></u></p><p=
 class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">CMD&gt; Still not convinced by the phrase low data rate =
links. The issues are ones of load relative
 to network capacity, and in particular if there are underutilised parts =
of the network. Plus of course a redundancy issue if packets do not all =
need to arrive. These can all occur in high data rate networks as much =
as low data rate ones.</span><u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">It makes sense. I'm OK with =
removing the text related to low data rate links.&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&lt;snip&gt;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal">PT_=E2=80=A6 What about hop count? Elsewhere in =
OLSRv2 we record that as well (e.g Routing Set).<u class=3D""></u><u =
class=3D""></u></p>
</blockquote>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Actually, the number of the items =
in the array PT_address[1...n] already gives the hop count -- is it =
necessary to repeat the information with an additional field? It is not =
used
 anyways.&nbsp;<u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">CMD&gt; That it=E2=80=99s there could be called out. It =
gets used in OLSRv2 as a suggested tie-breaker, and
 some tools might use it. I thought I=E2=80=99d made a comment to say =
what n is, which I don=E2=80=99t see here. This can combine with =
that</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Yes. we added some text on what =
"n" is.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&lt;snip&gt;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p class=3D"MsoNormal">A=
 major omission is discussion of expiry of new Tuples without expiry =
times. If proactive you can (but don=E2=80=99t) discuss when supporting =
sets change.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</blockquote>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal">If reactive it=E2=80=99s rather a mess (a reason I =
dislike the reactive mechanism). When to discard? When to recreate? If =
dependent on packet flow then that=E2=80=99s another interaction with IP
 to document - and implement.<u class=3D""></u><u class=3D""></u></p>
</blockquote>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">The update of the the Multi-path =
routing set is described in section 8.6. The expiry timers are removed =
since -07 based on the comments received. One of the reasons is to be =
consistent
 with the OLSRv2 routing set, in which no expiry timer is used.&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Generally speaking, in proactive =
mode, it follows the same mechanism as OLSRv2: when ever there is a need =
to update the OLSRv2 routing set, the multi-path routing set is =
updated.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">In reactive mode, all the =
Multi-path routing tuples are removed when the "topology graph" is =
changed.&nbsp; The new tuples are recreated "on-demand".&nbsp;<u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">CMD&gt; OK, let=E2=80=99s think about that in the reactive =
case. (Proactive is easy, but it needs to be said,
 which it isn=E2=80=99t.) You want a set, you generate it on demand. =
There is a change to the Topology Graph. So do you recalculate the set?
</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">No, at this point, we only clear =
the entire Multi-path Routing Set.&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">If not then you introduce a stutter, as the packets are =
flowing and the set disappears and you need
 to trigger it again. </span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Yes, it necessary to trigger the =
calculation again. But the time required is trivial, because this is =
only local: no additional message exchange with other routers is =
required.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">Which means monitoring for that throughout a flow, not =
just at its start.
</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">We don't actually have the =
concept "flow" in this extension. For each datagram, yes, it's necessary =
to check if a tuple exist or not. There is no much difference from =
checking the FIB for IP.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">If you do (recalculate the set when the graph changes) how =
do you know when to stop calculating it?
 That depends on knowing when the flow stops.</span>&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">And =E2=80=9Cthe Topology Graph changes=E2=80=9D is more =
than is required - some changes to the graph would have
 no effect (for example the increase in metric of a link not being =
used). But it=E2=80=99s hard to specify.
</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">For the moment, we simply take =
"the topology graph changes", because even links that not used might =
matters: for example, the decrease in metric of a not used metric that =
introduces a better path. &nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">It's true that it's possible that =
it's more than required and could be optimised in the future, but =
considering it's a reactive approach, I believe it's acceptable.&nbsp;<u =
class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">On this point (which changes) some sort of permissive =
wording to indicate that you can avoid making
 changes when you know they don=E2=80=99t matter is probably right. The =
when do you stop calculating question is more important - and needs text =
discussing it.</span>&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal"><br class=3D"">
You could when acting reactively forward by usual means in all cases =
while waiting.<br class=3D"">
<br class=3D"">
The actual packet forwarding by round-robin is an IP process, not this =
protocol. Needs to not be buried in 8.4. And if it=E2=80=99s an IP =
process, why mandate exactly how it=E2=80=99s used?<u class=3D""></u><u =
class=3D""></u></p>
</blockquote>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Choosing which path to put in the =
source routing header is olsrv2-multipath specific, because there are =
multiple of them. Of course, using round-robin is not mandatory -- using
 other schedulers won't impact the compatibility. Actually, we put it as =
one of the experiment points also:<u class=3D""></u><u class=3D""></u></p>=

</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D"">
<blockquote style=3D"border-style:none none none =
solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0cm=
 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=3D""><p =
class=3D"MsoNormal"><i class=3D"">&nbsp;Different path-selection =
schedulers.&nbsp; By default, Round-Robin<br class=3D"">
&nbsp; &nbsp; &nbsp; scheduling is used to select a path to be used for =
datagrams.&nbsp; In<br class=3D"">
&nbsp; &nbsp; &nbsp; some scenarios, weighted scheduling can be =
considered: for<br class=3D"">
&nbsp; &nbsp; &nbsp; example, the paths with lower metrics (i.e., higher =
quality) can<br class=3D"">
&nbsp; &nbsp; &nbsp; transfer more datagrams compared to paths with =
higher metrics.</i><u class=3D""></u><u class=3D""></u></p>
</blockquote>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">CMD&gt; This is missing my point. It=E2=80=99s not the =
round-robin that matters, it=E2=80=99s that IP needs to do anything.
 That=E2=80=99s what needs not to be buried. Putting together a clear =
=E2=80=9Cwhat IP needs to do=E2=80=9D section early on, perhaps in the =
applicability section, is needed.</span><u class=3D""></u><u =
class=3D""></u></p><p class=3D"MsoNormal"><span =
style=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125=
)" class=3D"">&nbsp;</span><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">We added the following text in =
the applicability statement:<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal"><i class=3D"">MP-OLSRv2 supports =
two different, but interoperable multi-path calculation approaches: =
proactive and reactive. In the proactive calculation, the paths to all =
the destinations are calculated before needed. In the reactive =
calculation,
 only the paths to desired destination(s) are calculated on demand. The =
proactive approach requires more computational resources than the =
reactive one. The reactive approach requires the IP forwarding plan to =
trigger the multi-path calculation.</i><u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><i class=3D"">MP-OLSRv2 forwards =
datagrams using the source routing header. As there are multiple paths =
to each destination, MP-OLSRv2 requires the IP forwarding plan to be =
able to choose which source route to be put in the source routing header =
based
 on the path scheduler defined by MP-OLSRv2. For IPv4 networks, =
implementation of loose source routing is required following [RFC0791]. =
For IPv6 networks, implementation of strict source routing is required =
following [RFC6554].</i><u class=3D""></u><u class=3D""></u></p>
</div>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">As usual, an updated draft is =
attached, in case needed.&nbsp;<u class=3D""></u><u class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">regards<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">Jiazi<u class=3D""></u><u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div>
<div class=3D""><p class=3D"MsoNormal">&nbsp;<u class=3D""></u><u =
class=3D""></u></p>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt" class=3D"">
<div class=3D""><p =
class=3D"MsoNormal">&lt;draft-ietf-manet-olsrv2-multipath.txt&gt;<u =
class=3D""></u><u class=3D""></u></p>
</div>
</blockquote>
</div>
</div><p class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u =
class=3D""></u></p>
</div><p =
class=3D"">***************************************************************=
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You should not copy it or use it for any purpose nor disclose or<br =
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<br class=3D"">_______________________________________________<br =
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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Jiazi YI <ietf@jiaziyi.com>, "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>, "Ratliff, Stanley" <sratliff@idirect.net>
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Date: Thu, 23 Jun 2016 23:10:13 +0000
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Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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On 6/23/16, 5:24 PM, "yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on beha=
lf of Jiazi YI" <yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on behalf of=
 ietf@jiaziyi.com<mailto:ietf@jiaziyi.com>> wrote:

Jiazi:

Hi!

Disclaimer:  I'm jumping in the middle of the thread here...

...
I'm having Alvaro in cc also, because it's kind of cross WG issue.
Alvaro: Using source routing is not a rare case in IPv6. Only considering M=
ANET WG, there is DSR, and AODVv2 (although it's now off the charter) also =
discussed possible extension with path accumulation.
Personally, I believe having a reference to RFC6554 should be OK, with some=
 explanations in the draft. Your advice would be appreciated.

I don't think that "referencing RFC6554" is as simple as referencing any ot=
her RFC.  First of all, there's the (already mentioned) issue of the RPL-sp=
ecific language in RFC6554, which means that (potentially) extensive update=
s would have to be put in place to clearly have MANET (OLSR or otherwise) r=
outers apply it properly.

Then there is the huge issue of RH0 being deprecated deprecated [rfc5095]. =
 RFC6554 went through significant discussion at the time (not just within r=
oll, but in 6man/v6ops, etc.) because it is basically resurrecting function=
ality that the IETF already said shouldn't be.  Clearly, RFC6554 defies spe=
cific RPL-related behaviors, for example "RPL routers implement a strict so=
urce route policy where each and every IPv6 hop between the source and dest=
ination of the source route is specified within the SRH" -- IOW, roll clear=
ly defined use cases and conditions that required source routing and could =
be controlled in the network.  I think that the use cases and justification=
s for a MANET network are different.  I don't think that putting MANET-spec=
ific language as an update to RFC6554 would be enough for the IETF to appro=
ve - it feels to me like trying to run around the process.

Roll is not the only WG that has successfully justified needs for source ro=
uting functionality.  The spring WG is in the process of also adding IPv6 e=
xtensions for source routing [1] [2] -- it justified the need and (similar =
to RFC6554) includes segment routing-speficic behavior to reduce concerns a=
bout rfc5095.


I believe that to add source routing functionality to anything new (beyond =
rpl and segment routing networks), we will have to go through the same proc=
ess: justify the functionality/needs and work with 6man on the extension.

If I read this thread correctly, part of the reason for referencing RFC6554=
 is to use the format and other functionality (compression?) in MANET netwo=
rks.  I don't see (provided the right justification) a reason for not reuse=
 the packets and compression mechanisms specified there (if that is what MA=
NET needs/wants).


Having said all that, I think that a good first step would be to talk to th=
e 6man Chairs about the need/intent.  They will probably want clear justifi=
cation (use cases) and, eventually, the specification (which I think can po=
int to RFC6554 for packet format, etc).  I think both could be covered I a =
single document.  I suggest having the WG Chairs do that initial approach.


Now to a slightly separate topic.  Even though the WG (in the updated chart=
er [3]) is responsible to work on "maintenance of OLSR", this work really g=
oes beyond my definition of "maintenance" because of the significant effort=
 that may be needed (not just in writing, but cross-WG coordination, etc.).=
  I really want the WG to focus on the specifically chartered items and hop=
e that we can complete them within the milestone dates.  To be clear: I'm n=
ot asking you not to do this work, I want the WG Chairs to prioritize appro=
priately and this work (draft-ietf-olsrv2-multipath) being currently tagged=
 as Experimental doesn't seem to raise in priority to me [*].

Thanks!

Alvaro.


[1] https://tools.ietf.org/html/draft-ietf-spring-ipv6-use-cases
[2] https://tools.ietf.org/html/draft-ietf-6man-segment-routing-header
[3] https://datatracker.ietf.org/doc/charter-ietf-manet/

[*] I doubt that 6man will want to put in an extension (even if it's alread=
y defied in RFC6554) for an Experimental effort.  I of course may be wrong =
and the Experimental nature may make it easier in their eyes to simply refe=
rence RFC6554.

--_000_D391D9FD1309C9aretanaciscocom_
Content-Type: text/html; charset="iso-8859-1"
Content-ID: <B69BD33C2B75BB4CA74445354ACCA1DD@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/23/16, 5:24 PM, &quot;<a href=3D"mailto:yi.jiazi@gmail.com">yi.ji=
azi@gmail.com</a> on behalf of Jiazi YI&quot; &lt;<a href=3D"mailto:yi.jiaz=
i@gmail.com">yi.jiazi@gmail.com</a> on behalf of
<a href=3D"mailto:ietf@jiaziyi.com">ietf@jiaziyi.com</a>&gt; wrote:</div>
<div><br>
</div>
<div>Jiazi:</div>
<div><br>
</div>
<div>Hi!</div>
<div><br>
</div>
<div>Disclaimer: &nbsp;I'm jumping in the middle of the thread here&#8230;<=
/div>
<div><br>
</div>
<div>&#8230;</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div dir=3D"ltr">
<div class=3D"gmail_extra">I'm having Alvaro in cc also, because it's kind =
of cross WG issue.&nbsp;</div>
<div class=3D"gmail_extra">Alvaro: Using source routing is not a rare case =
in IPv6. Only considering MANET WG, there is DSR, and AODVv2 (although it's=
 now off the charter) also discussed possible extension with path accumulat=
ion.&nbsp;</div>
<div class=3D"gmail_extra">Personally, I believe having a reference to RFC6=
554 should be OK, with some explanations in the draft. Your advice would be=
 appreciated.&nbsp;</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I don't think that &quot;referencing RFC6554&quot; is as simple as ref=
erencing any other RFC. &nbsp;First of all, there's the (already mentioned)=
 issue of the RPL-specific language in RFC6554, which means that (potential=
ly) extensive updates would have to be put in place
 to clearly have MANET (OLSR or otherwise) routers apply it properly.</div>
<div><br>
</div>
<div>Then there is the huge issue of RH0 being deprecated deprecated [rfc50=
95]. &nbsp;RFC6554 went through significant discussion at the time (not jus=
t within roll, but in 6man/v6ops, etc.) because it is basically resurrectin=
g functionality that the IETF already
 said shouldn't be. &nbsp;Clearly, RFC6554 defies specific RPL-related beha=
viors, for example &quot;RPL routers implement a strict source route policy=
 where each and every IPv6 hop between the source and destination of the so=
urce route is specified within the SRH&quot; --
 IOW, roll clearly defined use cases and conditions that required source ro=
uting and could be controlled in the network. &nbsp;I think that the use ca=
ses and justifications for a MANET network are different. &nbsp;I don't thi=
nk that putting MANET-specific language as
 an update to RFC6554 would be enough for the IETF to approve &#8212; it fe=
els to me like trying to run around the process.</div>
<div><br>
</div>
<div>Roll is not the only WG that has successfully justified needs for sour=
ce routing functionality. &nbsp;The spring WG is in the process of also add=
ing IPv6 extensions for source routing [1] [2] -- it justified the need and=
 (similar to RFC6554) includes segment
 routing-speficic behavior to reduce concerns about&nbsp;rfc5095.</div>
<div><br>
</div>
<div><br>
</div>
<div>I believe that to add source routing functionality to anything new (be=
yond rpl and segment routing networks), we will have to go through the same=
 process: justify the functionality/needs and work with 6man on the extensi=
on.</div>
<div><br>
</div>
<div>If I read this thread correctly, part of the reason for referencing RF=
C6554 is to use the format and other functionality (compression?) in MANET =
networks. &nbsp;I don't see (provided the right justification) a reason for=
 not reuse the packets and compression
 mechanisms specified there (if that is what MANET needs/wants).</div>
<div><br>
</div>
<div><br>
</div>
<div>Having said all that, I think that a good first step would be to talk =
to the 6man Chairs about the need/intent. &nbsp;They will probably want cle=
ar justification (use cases) and, eventually, the specification (which I th=
ink can point to RFC6554 for packet format,
 etc). &nbsp;I think both could be covered I a single document. &nbsp;I sug=
gest having the WG Chairs do that initial approach.</div>
<div><br>
</div>
<div><br>
</div>
<div>Now to a slightly separate topic. &nbsp;Even though the WG (in the upd=
ated charter [3]) is responsible to work on &quot;maintenance of OLSR&quot;=
, this work really goes beyond my definition of &quot;maintenance&quot; bec=
ause of the significant effort that may be needed (not just
 in writing, but cross-WG coordination, etc.). &nbsp;I really want the WG t=
o focus on the specifically chartered items and hope that we can complete t=
hem within the milestone dates. &nbsp;To be clear: I'm not asking you not t=
o do this work, I want the WG Chairs to prioritize
 appropriately and this work (draft-ietf-olsrv2-multipath) being currently =
tagged as Experimental doesn't seem to raise in priority to me [*].</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
<div><br>
</div>
<div><br>
</div>
<div>[1]&nbsp;<a href=3D"https://tools.ietf.org/html/draft-ietf-spring-ipv6=
-use-cases">https://tools.ietf.org/html/draft-ietf-spring-ipv6-use-cases</a=
></div>
<div>[2]&nbsp;<a href=3D"https://tools.ietf.org/html/draft-ietf-6man-segmen=
t-routing-header">https://tools.ietf.org/html/draft-ietf-6man-segment-routi=
ng-header</a>&nbsp;</div>
<div>[3]&nbsp;<a href=3D"https://datatracker.ietf.org/doc/charter-ietf-mane=
t">https://datatracker.ietf.org/doc/charter-ietf-manet</a>/&nbsp;</div>
<div><br>
</div>
<div>[*] I doubt that 6man will want to put in an extension (even if it's a=
lready defied in RFC6554) for an Experimental effort. &nbsp;I of course may=
 be wrong and the Experimental nature may make it easier in their eyes to s=
imply reference RFC6554.</div>
</body>
</html>

--_000_D391D9FD1309C9aretanaciscocom_--


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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>, Jiazi YI <ietf@jiaziyi.com>, "Ratliff, Stanley" <sratliff@idirect.net>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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While I don't have anything concrete to bring to the WG at this time, and m=
ight never, in discussion on the charter the chairs gave the impression, to=
 me at least, that OLSRv2 maintenance didn't exclude new items.

How much any such new item would impact other work would, I agree, be an is=
sue. Here we do (at the last minute, and partly by chance - though someone =
outside the WG would probably have spotted the issue later) have something =
that's cross-WG and is therefore a bigger issue. But I would hope that some=
thing that is self-contained would be acceptable. And while I've had my iss=
ues with this draft, they've been about making it better (in some places, g=
ood enough).

--
Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com<mailto:chris.de=
arlove@baesystems.com>

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai<http://www.baesystems.com/ai>
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

From: Alvaro Retana (aretana) [mailto:aretana@cisco.com]
Sent: 24 June 2016 00:10
To: Jiazi YI; Dearlove, Christopher (UK); Ratliff, Stanley
Cc: MANET IETF; Justin Dean
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09


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ith%20Suspicious%20Emails.pdf>.
On 6/23/16, 5:24 PM, "yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on beha=
lf of Jiazi YI" <yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on behalf of=
 ietf@jiaziyi.com<mailto:ietf@jiaziyi.com>> wrote:

Jiazi:

Hi!

Disclaimer:  I'm jumping in the middle of the thread here...

...
I'm having Alvaro in cc also, because it's kind of cross WG issue.
Alvaro: Using source routing is not a rare case in IPv6. Only considering M=
ANET WG, there is DSR, and AODVv2 (although it's now off the charter) also =
discussed possible extension with path accumulation.
Personally, I believe having a reference to RFC6554 should be OK, with some=
 explanations in the draft. Your advice would be appreciated.

I don't think that "referencing RFC6554" is as simple as referencing any ot=
her RFC.  First of all, there's the (already mentioned) issue of the RPL-sp=
ecific language in RFC6554, which means that (potentially) extensive update=
s would have to be put in place to clearly have MANET (OLSR or otherwise) r=
outers apply it properly.

Then there is the huge issue of RH0 being deprecated deprecated [rfc5095]. =
 RFC6554 went through significant discussion at the time (not just within r=
oll, but in 6man/v6ops, etc.) because it is basically resurrecting function=
ality that the IETF already said shouldn't be.  Clearly, RFC6554 defies spe=
cific RPL-related behaviors, for example "RPL routers implement a strict so=
urce route policy where each and every IPv6 hop between the source and dest=
ination of the source route is specified within the SRH" -- IOW, roll clear=
ly defined use cases and conditions that required source routing and could =
be controlled in the network.  I think that the use cases and justification=
s for a MANET network are different.  I don't think that putting MANET-spec=
ific language as an update to RFC6554 would be enough for the IETF to appro=
ve - it feels to me like trying to run around the process.

Roll is not the only WG that has successfully justified needs for source ro=
uting functionality.  The spring WG is in the process of also adding IPv6 e=
xtensions for source routing [1] [2] -- it justified the need and (similar =
to RFC6554) includes segment routing-speficic behavior to reduce concerns a=
bout rfc5095.


I believe that to add source routing functionality to anything new (beyond =
rpl and segment routing networks), we will have to go through the same proc=
ess: justify the functionality/needs and work with 6man on the extension.

If I read this thread correctly, part of the reason for referencing RFC6554=
 is to use the format and other functionality (compression?) in MANET netwo=
rks.  I don't see (provided the right justification) a reason for not reuse=
 the packets and compression mechanisms specified there (if that is what MA=
NET needs/wants).


Having said all that, I think that a good first step would be to talk to th=
e 6man Chairs about the need/intent.  They will probably want clear justifi=
cation (use cases) and, eventually, the specification (which I think can po=
int to RFC6554 for packet format, etc).  I think both could be covered I a =
single document.  I suggest having the WG Chairs do that initial approach.


Now to a slightly separate topic.  Even though the WG (in the updated chart=
er [3]) is responsible to work on "maintenance of OLSR", this work really g=
oes beyond my definition of "maintenance" because of the significant effort=
 that may be needed (not just in writing, but cross-WG coordination, etc.).=
  I really want the WG to focus on the specifically chartered items and hop=
e that we can complete them within the milestone dates.  To be clear: I'm n=
ot asking you not to do this work, I want the WG Chairs to prioritize appro=
priately and this work (draft-ietf-olsrv2-multipath) being currently tagged=
 as Experimental doesn't seem to raise in priority to me [*].

Thanks!

Alvaro.


[1] https://tools.ietf.org/html/draft-ietf-spring-ipv6-use-cases
[2] https://tools.ietf.org/html/draft-ietf-6man-segment-routing-header
[3] https://datatracker.ietf.org/doc/charter-ietf-manet/

[*] I doubt that 6man will want to put in an extension (even if it's alread=
y defied in RFC6554) for an Experimental effort.  I of course may be wrong =
and the Experimental nature may make it easier in their eyes to simply refe=
rence RFC6554.
********************************************************************
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">While I don&#8217;t have =
anything concrete to bring to the WG at this time, and might never, in disc=
ussion on the charter the chairs gave the impression, to me at
 least, that OLSRv2 maintenance didn&#8217;t exclude new items.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">How much any such new ite=
m would impact other work would, I agree, be an issue. Here we do (at the l=
ast minute, and partly by chance - though someone outside
 the WG would probably have spotted the issue later) have something that&#8=
217;s cross-WG and is therefore a bigger issue. But I would hope that somet=
hing that is self-contained would be acceptable. And while I&#8217;ve had m=
y issues with this draft, they&#8217;ve been about
 making it better (in some places, good enough).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">--
<o:p></o:p></span></b></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#0=
07E7E">Christopher Dearlove<br>
Senior Principal Engineer<br>
BAE Systems Applied Intelligence Laboratories<br>
</span></b><b><span style=3D"font-size:11.0pt;font-family:&quot;Arial&quot;=
,&quot;sans-serif&quot;;color:#BEBEBE">____________________________________=
______________________________________<br>
</span></b><span style=3D"font-size:8.0pt;font-family:&quot;Arial&quot;,&qu=
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<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> Alvaro Retana (aretana) [mailto:aretana@cisco.com]
<br>
<b>Sent:</b> 24 June 2016 00:10<br>
<b>To:</b> Jiazi YI; Dearlove, Christopher (UK); Ratliff, Stanley<br>
<b>Cc:</b> MANET IETF; Justin Dean<br>
<b>Subject:</b> Re: [manet] draft-ietf-olsrv2-multipath-09<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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nd:white"><b><span style=3D"font-size:15.0pt;font-family:&quot;Arial&quot;,=
&quot;sans-serif&quot;;color:#333972">*** WARNING ***<o:p></o:p></span></b>=
</p>
</div>
<div>
<p class=3D"MsoNormal" align=3D"center" style=3D"margin-bottom:12.0pt;text-=
align:center;background:white">
<em><span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,&quot;san=
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On 6/23/16, 5:24 PM, &quot;=
<a href=3D"mailto:yi.jiazi@gmail.com">yi.jiazi@gmail.com</a> on behalf of J=
iazi YI&quot; &lt;<a href=3D"mailto:yi.jiazi@gmail.com">yi.jiazi@gmail.com<=
/a>
 on behalf of <a href=3D"mailto:ietf@jiaziyi.com">ietf@jiaziyi.com</a>&gt; =
wrote:<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Jiazi:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi!<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Disclaimer: &nbsp;I'm jumpi=
ng in the middle of the thread here&#8230;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&#8230;<o:p></o:p></span></=
p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I'm having Alvaro in cc als=
o, because it's kind of cross WG issue.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Alvaro: Using source routin=
g is not a rare case in IPv6. Only considering MANET WG, there is DSR, and =
AODVv2 (although it's now off the charter) also discussed
 possible extension with path accumulation.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Personally, I believe havin=
g a reference to RFC6554 should be OK, with some explanations in the draft.=
 Your advice would be appreciated.&nbsp;<o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I don't think that &quot;re=
ferencing RFC6554&quot; is as simple as referencing any other RFC. &nbsp;Fi=
rst of all, there's the (already mentioned) issue of the RPL-specific langu=
age
 in RFC6554, which means that (potentially) extensive updates would have to=
 be put in place to clearly have MANET (OLSR or otherwise) routers apply it=
 properly.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Then there is the huge issu=
e of RH0 being deprecated deprecated [rfc5095]. &nbsp;RFC6554 went through =
significant discussion at the time (not just within roll, but
 in 6man/v6ops, etc.) because it is basically resurrecting functionality th=
at the IETF already said shouldn't be. &nbsp;Clearly, RFC6554 defies specif=
ic RPL-related behaviors, for example &quot;RPL routers implement a strict =
source route policy where each and every IPv6
 hop between the source and destination of the source route is specified wi=
thin the SRH&quot; -- IOW, roll clearly defined use cases and conditions th=
at required source routing and could be controlled in the network. &nbsp;I =
think that the use cases and justifications
 for a MANET network are different. &nbsp;I don't think that putting MANET-=
specific language as an update to RFC6554 would be enough for the IETF to a=
pprove &#8212; it feels to me like trying to run around the process.<o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Roll is not the only WG tha=
t has successfully justified needs for source routing functionality. &nbsp;=
The spring WG is in the process of also adding IPv6 extensions
 for source routing [1] [2] -- it justified the need and (similar to RFC655=
4) includes segment routing-speficic behavior to reduce concerns about&nbsp=
;rfc5095.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I believe that to add sourc=
e routing functionality to anything new (beyond rpl and segment routing net=
works), we will have to go through the same process: justify
 the functionality/needs and work with 6man on the extension.<o:p></o:p></s=
pan></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">If I read this thread corre=
ctly, part of the reason for referencing RFC6554 is to use the format and o=
ther functionality (compression?) in MANET networks. &nbsp;I
 don't see (provided the right justification) a reason for not reuse the pa=
ckets and compression mechanisms specified there (if that is what MANET nee=
ds/wants).<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Having said all that, I thi=
nk that a good first step would be to talk to the 6man Chairs about the nee=
d/intent. &nbsp;They will probably want clear justification (use
 cases) and, eventually, the specification (which I think can point to RFC6=
554 for packet format, etc). &nbsp;I think both could be covered I a single=
 document. &nbsp;I suggest having the WG Chairs do that initial approach.<o=
:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Now to a slightly separate =
topic. &nbsp;Even though the WG (in the updated charter [3]) is responsible=
 to work on &quot;maintenance of OLSR&quot;, this work really goes beyond
 my definition of &quot;maintenance&quot; because of the significant effort=
 that may be needed (not just in writing, but cross-WG coordination, etc.).=
 &nbsp;I really want the WG to focus on the specifically chartered items an=
d hope that we can complete them within the milestone
 dates. &nbsp;To be clear: I'm not asking you not to do this work, I want t=
he WG Chairs to prioritize appropriately and this work (draft-ietf-olsrv2-m=
ultipath) being currently tagged as Experimental doesn't seem to raise in p=
riority to me [*].<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks!<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Alvaro.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[1]&nbsp;<a href=3D"https:/=
/tools.ietf.org/html/draft-ietf-spring-ipv6-use-cases">https://tools.ietf.o=
rg/html/draft-ietf-spring-ipv6-use-cases</a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[2]&nbsp;<a href=3D"https:/=
/tools.ietf.org/html/draft-ietf-6man-segment-routing-header">https://tools.=
ietf.org/html/draft-ietf-6man-segment-routing-header</a>&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[3]&nbsp;<a href=3D"https:/=
/datatracker.ietf.org/doc/charter-ietf-manet">https://datatracker.ietf.org/=
doc/charter-ietf-manet</a>/&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">[*] I doubt that 6man will =
want to put in an extension (even if it's already defied in RFC6554) for an=
 Experimental effort. &nbsp;I of course may be wrong and the
 Experimental nature may make it easier in their eyes to simply reference R=
FC6554.<o:p></o:p></span></p>
</div>
</div>
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References: <9CC61969-5F6A-4F14-87C6-99B47080DDB3@gmail.com> <CAN1bDFz9AKg2y=ck_ue3SAwyWPafBLSBBbXQMcS-5OARHjeBVg@mail.gmail.com> <B31EEDDDB8ED7E4A93FDF12A4EECD30D923D1304@GLKXM0002V.GREENLNK.net> <CAN1bDFwPMAHKymyA5ASyRQWfMQ5ixer88jSbcOeunJm1nAGAtw@mail.gmail.com> <BBB23144-23BA-4D72-958D-8F1B8C949724@gmail.com> <CAN1bDFxixObUbKo7HErSS-QrrdMFzUfdSBJQrsbW1Yq+h7s2Xw@mail.gmail.com> <B31EEDDDB8ED7E4A93FDF12A4EECD30D923D1A4D@GLKXM0002V.GREENLNK.net> <B31EEDDDB8ED7E4A93FDF12A4EECD30D923D1C19@GLKXM0002V.GREENLNK.net> <ecaf7affc20c4f9088cbb33ebb7f6f53@VAUSDITCHM2.idirect.net> <B31EEDDDB8ED7E4A93FDF12A4EECD30D923D1C44@GLKXM0002V.GREENLNK.net> <CAN1bDFyDamVA+NGj1XPEnF8ms13wCLxMRc7BW1_EOpuN7wL1WA@mail.gmail.com> <D391D9FD.1309C9%aretana@cisco.com>
From: Jiazi YI <ietf@jiaziyi.com>
Date: Fri, 24 Jun 2016 11:16:07 +0200
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To: "Alvaro Retana (aretana)" <aretana@cisco.com>
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Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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--001a1142b99e0941600536029fea
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Hi Alvaro:

Thanks very much for your advices.

<snip>

> If I read this thread correctly, part of the reason for referencing
> RFC6554 is to use the format and other functionality (compression?) in
> MANET networks.  I don't see (provided the right justification) a reason
> for not reuse the packets and compression mechanisms specified there (if
> that is what MANET needs/wants).
>

Yes, correct.


>
>
> Having said all that, I think that a good first step would be to talk to
> the 6man Chairs about the need/intent.  They will probably want clear
> justification (use cases) and, eventually, the specification (which I think
> can point to RFC6554 for packet format, etc).  I think both could be
> covered I a single document.  I suggest having the WG Chairs do that
> initial approach.
>

We will discuss with the WG chairs to see how to communicate with the 6man
chairs and ask for their advices.


>
>
> Now to a slightly separate topic.  Even though the WG (in the updated
> charter [3]) is responsible to work on "maintenance of OLSR", this work
> really goes beyond my definition of "maintenance" because of the
> significant effort that may be needed (not just in writing, but cross-WG
> coordination, etc.).  I really want the WG to focus on the specifically
> chartered items and hope that we can complete them within the milestone
> dates.  To be clear: I'm not asking you not to do this work, I want the WG
> Chairs to prioritize appropriately and this work
> (draft-ietf-olsrv2-multipath) being currently tagged as Experimental
> doesn't seem to raise in priority to me [*].
>

The multipath routing in MANET has attracted lots of interests in academia.
olsrv2-multipath has already several implementations, verified in both
field tests and simulations.  We believe now it's the right time to have it
clearly specified and request for more experience from the community --
that's why we prudently aim for experimental track.

Of course, As a WG, the priority is achieving the milestones, but I don't
think it would preclude having extensions to OLSRv2, which is part of the
charter also. In fact, IIRC, during the recharter discussion, several
extensions for OLSRv2 were proposed. The WG finished with using the term
"The MANET WG is responsible for the *maintenance* of OLSRv2 [RFC 7181],
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],
and their *extensions*.", instead of listing possible extensions
explicitly.

regards

Jiazi


>
> Thanks!
>
> Alvaro.
>
>
> [1] https://tools.ietf.org/html/draft-ietf-spring-ipv6-use-cases
> [2] https://tools.ietf.org/html/draft-ietf-6man-segment-routing-header
> [3] https://datatracker.ietf.org/doc/charter-ietf-manet/
>
> [*] I doubt that 6man will want to put in an extension (even if it's
> already defied in RFC6554) for an Experimental effort.  I of course may be
> wrong and the Experimental nature may make it easier in their eyes to
> simply reference RFC6554.
>

--001a1142b99e0941600536029fea
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Alvaro:<div class=3D"gmail_extra"><div class=3D"gmail_q=
uote"><div><br></div><div>Thanks very much for your advices.=C2=A0</div><di=
v><br></div><div>&lt;snip&gt;=C2=A0</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:r=
gb(204,204,204);border-left-style:solid;padding-left:1ex"><div style=3D"wor=
d-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-=
serif"><div>
</div>
<div>If I read this thread correctly, part of the reason for referencing RF=
C6554 is to use the format and other functionality (compression?) in MANET =
networks.=C2=A0 I don&#39;t see (provided the right justification) a reason=
 for not reuse the packets and compression
 mechanisms specified there (if that is what MANET needs/wants).</div></div=
></blockquote><div><br></div><div>Yes, correct.=C2=A0</div><div>=C2=A0</div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;=
padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-=
size:14px;font-family:Calibri,sans-serif">
<div><br>
</div>
<div><br>
</div>
<div>Having said all that, I think that a good first step would be to talk =
to the 6man Chairs about the need/intent.=C2=A0 They will probably want cle=
ar justification (use cases) and, eventually, the specification (which I th=
ink can point to RFC6554 for packet format,
 etc).=C2=A0 I think both could be covered I a single document.=C2=A0 I sug=
gest having the WG Chairs do that initial approach.</div></div></blockquote=
><div><br></div><div>We will discuss with the WG chairs to see how to commu=
nicate with the 6man chairs and ask for their advices.=C2=A0</div><div>=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-styl=
e:solid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,=
0);font-size:14px;font-family:Calibri,sans-serif">
<div><br>
</div>
<div><br>
</div>
<div>Now to a slightly separate topic.=C2=A0 Even though the WG (in the upd=
ated charter [3]) is responsible to work on &quot;maintenance of OLSR&quot;=
, this work really goes beyond my definition of &quot;maintenance&quot; bec=
ause of the significant effort that may be needed (not just
 in writing, but cross-WG coordination, etc.).=C2=A0 I really want the WG t=
o focus on the specifically chartered items and hope that we can complete t=
hem within the milestone dates.=C2=A0 To be clear: I&#39;m not asking you n=
ot to do this work, I want the WG Chairs to prioritize
 appropriately and this work (draft-ietf-olsrv2-multipath) being currently =
tagged as Experimental doesn&#39;t seem to raise in priority to me [*].</di=
v></div></blockquote><div><br></div><div>The multipath routing in MANET has=
 attracted lots of interests in academia. olsrv2-multipath has already seve=
ral implementations, verified in both field tests and simulations.=C2=A0 We=
 believe now it&#39;s the right time to have it clearly specified and reque=
st for more experience from the community -- that&#39;s why we prudently ai=
m for experimental track.=C2=A0</div><div><br></div><div>Of course, As a WG=
, the priority is achieving the milestones, but I don&#39;t think it would =
preclude having extensions to OLSRv2, which is part of the charter also. In=
 fact, IIRC, during the recharter discussion, several extensions for OLSRv2=
 were proposed. The WG finished with using the term &quot;The MANET WG is r=
esponsible for the <b>maintenance</b> of OLSRv2 [RFC 7181],</div><div>NHDP =
[RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],=C2=A0=
</div><div>and their <b>extensions</b>.&quot;, instead of listing possible =
extensions explicitly.=C2=A0</div><div><br></div><div>regards</div><div><br=
></div><div>Jiazi</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rg=
b(204,204,204);border-left-style:solid;padding-left:1ex"><div style=3D"word=
-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-s=
erif">
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
<div><br>
</div>
<div><br>
</div>
<div>[1]=C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-spring-ipv6=
-use-cases" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-spring=
-ipv6-use-cases</a></div>
<div>[2]=C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-6man-segmen=
t-routing-header" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-=
6man-segment-routing-header</a>=C2=A0</div>
<div>[3]=C2=A0<a href=3D"https://datatracker.ietf.org/doc/charter-ietf-mane=
t" target=3D"_blank">https://datatracker.ietf.org/doc/charter-ietf-manet</a=
>/=C2=A0</div>
<div><br>
</div>
<div>[*] I doubt that 6man will want to put in an extension (even if it&#39=
;s already defied in RFC6554) for an Experimental effort.=C2=A0 I of course=
 may be wrong and the Experimental nature may make it easier in their eyes =
to simply reference RFC6554.</div>
</div>

</blockquote></div><br></div></div>

--001a1142b99e0941600536029fea--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Jiazi YI <ietf@jiaziyi.com>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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Cc: "Dearlove, Christopher \(UK\)" <chris.dearlove@baesystems.com>, MANET IETF <manet@ietf.org>
Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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On 6/24/16, 5:16 AM, "yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on beha=
lf of Jiazi YI" <yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on behalf of=
 ietf@jiaziyi.com<mailto:ietf@jiaziyi.com>> wrote:

Hi!

Of course, As a WG, the priority is achieving the milestones, but I don't t=
hink it would preclude having extensions to OLSRv2, which is part of the ch=
arter also. In fact, IIRC, during the recharter discussion, several extensi=
ons for OLSRv2 were proposed. The WG finished with using the term "The MANE=
T WG is responsible for the maintenance of OLSRv2 [RFC 7181],
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],
and their extensions.", instead of listing possible extensions explicitly.

As I said: "To be clear: I'm not asking you not to do this work, I want the=
 WG Chairs to prioritize appropriately..."  That's it!  If the WG wants to =
take this work on, I don't have a problem - it is with in the charter.  Let=
's just not forget about the other work we have...

The second part of the point I tried to make was, I think, more important: =
 extensions to IPv6 are not within the manet WG's charter, but they belong =
to 6man.  It would probably be more effective if the source routing work wa=
s in the Standards Track.  I'm assuming that Multi-path is just one use cas=
e for source routing, but there are probably more.  I also wrote: "[*] I do=
ubt that 6man will want to put in an extension (even if it's already defied=
 in RFC6554) for an Experimental effort.  I of course may be wrong and the =
Experimental nature may make it easier in their eyes to simply reference RF=
C6554."

Note that what I'm suggesting is not to put the Multi-path work in the Stan=
dards Track (that is a separate discussion) - but to justify source routing=
 for MANET networks as a larger need (including multi-path, but bigger than=
 that).

Thanks!

Alvaro.

--_000_D3929075130AE7aretanaciscocom_
Content-Type: text/html; charset="iso-8859-1"
Content-ID: <60DB44E5C132DA4F9DDB6DE62EF02C10@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>On 6/24/16, 5:16 AM, &quot;<a href=3D"mailto:yi.jiazi@gmail.com">yi.ji=
azi@gmail.com</a> on behalf of Jiazi YI&quot; &lt;<a href=3D"mailto:yi.jiaz=
i@gmail.com">yi.jiazi@gmail.com</a> on behalf of
<a href=3D"mailto:ietf@jiaziyi.com">ietf@jiaziyi.com</a>&gt; wrote:</div>
<div><br>
</div>
<div>Hi!</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div style=3D"color: rgb(0, 0, 0); font-family: -webkit-standard; font-styl=
e: normal; font-variant: normal; font-weight: normal; letter-spacing: norma=
l; orphans: auto; text-align: start; text-indent: 0px; text-transform: none=
; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke=
-width: 0px;">
Of course, As a WG, the priority is achieving the milestones, but I don't t=
hink it would preclude having extensions to OLSRv2, which is part of the ch=
arter also. In fact, IIRC, during the recharter discussion, several extensi=
ons for OLSRv2 were proposed. The
 WG finished with using the term &quot;The MANET WG is responsible for the<=
span class=3D"Apple-converted-space">&nbsp;</span><b>maintenance</b><span c=
lass=3D"Apple-converted-space">&nbsp;</span>of OLSRv2 [RFC 7181],</div>
<div style=3D"color: rgb(0, 0, 0); font-family: -webkit-standard; font-styl=
e: normal; font-variant: normal; font-weight: normal; letter-spacing: norma=
l; orphans: auto; text-align: start; text-indent: 0px; text-transform: none=
; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke=
-width: 0px;">
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],&=
nbsp;</div>
<div style=3D"color: rgb(0, 0, 0); font-family: -webkit-standard; font-styl=
e: normal; font-variant: normal; font-weight: normal; letter-spacing: norma=
l; orphans: auto; text-align: start; text-indent: 0px; text-transform: none=
; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke=
-width: 0px;">
and their<span class=3D"Apple-converted-space">&nbsp;</span><b>extensions</=
b>.&quot;, instead of listing possible extensions explicitly.&nbsp;</div>
</blockquote>
</span>
<div><br>
</div>
<div>As I said: &quot;To be clear: I'm not asking you not to do this work, =
I want the WG Chairs to prioritize appropriately&#8230;&quot; &nbsp;That's =
it! &nbsp;If the WG wants to take this work on, I don't have a problem &#82=
12; it is with in the charter. &nbsp;Let's just not forget about the
 other work we have&#8230;&nbsp;</div>
<div><br>
</div>
<div>The second part of the point I tried to make was, I think, more import=
ant: &nbsp;extensions to IPv6 are
<span style=3D"font-weight: bold;">not</span>&nbsp;within the manet WG's ch=
arter, but they belong to 6man. &nbsp;It would probably be more effective i=
f the source routing work was in the Standards Track. &nbsp;I'm assuming th=
at Multi-path is just one use case for source routing,
 but there are probably more. &nbsp;I also wrote: &quot;[*] I doubt that 6m=
an will want to put in an extension (even if it's already defied in RFC6554=
) for an Experimental effort. &nbsp;I of course may be wrong and the Experi=
mental nature may make it easier in their eyes
 to simply reference RFC6554.&quot;</div>
<div><br>
</div>
<div>Note that what I'm suggesting is not to put the Multi-path work in the=
 Standards Track (that is a separate discussion) &#8212; but to justify
<span style=3D"font-weight: bold;">source routing for MANET networks</span>=
&nbsp;as a larger need (including multi-path, but bigger than that).</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
</body>
</html>

--_000_D3929075130AE7aretanaciscocom_--


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Dear Justin Dean,

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

manet Session 1 (1:00:00)
    Wednesday, Afternoon Session I 1400-1530
    Room Name: Charlottenburg I size: 80
    ---------------------------------------------
    


Request Information:


---------------------------------------------------------
Working Group Name: Mobile Ad-hoc Networks
Area Name: Routing Area
Session Requester: Justin Dean

Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 30
Conflicts to Avoid: 
 First Priority: rtgarea gaia roll homenet pim 6lo
 Second Priority: rtgwg i2rs spring pce lwig
 Third Priority: netconf anima idr


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


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "manet@ietf.org" <manet@ietf.org>, "babel@ietf.org" <babel@ietf.org>
Thread-Topic: [gaia] GAIA RG Meeting Agenda - July 21, 2016 (IETF 96)
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Subject: [manet] FW: [gaia] GAIA RG Meeting Agenda - July 21, 2016 (IETF 96)
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FYI..

On 6/27/16, 5:15 AM, "gaia on behalf of Matthew Ford"
<gaia-bounces@irtf.org on behalf of ford@isoc.org> wrote:

>Folks,
>
>This is the draft agenda for our meeting which will take place during
>IETF 96 in Berlin next month. I have included links to the remote
>participation tools. I hope to see some of you there, both physically and
>virtually.
>
>Regards,
>Mat
>
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
>Preliminary Agenda
>GAIARG Meeting @ IETF-96
>Berlin, Germany
>Thursday, July 21, 2016 (CEST)
>14:00-16:00   Thursday Afternoon session I
>Location: Schoeneberg
>Audio: http://ietf96streaming.dnsalias.net/ietf/ietf968.m3u
>Video: http://www.meetecho.com/ietf96/gaia
>Etherpad: http://etherpad.tools.ietf.org:9000/p/notes-ietf-96-gaia
>Jabber: gaia@jabber.ietf.org
>
>Welcome, Agenda Bashing, Minutes taker, Blue sheets, Status
>  Chairs
>  10 mins
>
>Refugee Hotspot - providing Internet connectivity to Refugees and Migrants
>  Niels ten Oever & Shane Kerr
>  20 mins
>
>The dual role of community networks: Internet access vs. local services
>  Panayotis Antoniadis
>  30 mins
>
>FreeSurf: Application-Centric Wireless Access
>  Zhen Cao
>  20 mins
>
>Sustainability in guifi.net: Initial results of cost sharing
>  Roger Baig
>  20 mins=20
>
>Wi-5: Advanced Features for Low-cost Wi-Fi APs
>  Jose Saldana, University of Zaragoza.
>  5 mins + Q&A
>
>Open discussion of next steps for GAIARG
>  Chairs
>  15 mins
>
>_______________________________________________
>gaia mailing list
>gaia@irtf.org
>https://www.irtf.org/mailman/listinfo/gaia


From nobody Mon Jun 27 10:31:29 2016
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References: <20160616124721.10516.61164.idtracker@ietfa.amsl.com> <D3880BB0.12E7C6%aretana@cisco.com> <5762AA32.9030204@cs.tcd.ie> <D3881740.12E836%aretana@cisco.com> <CADnDZ8_ntmghVkY0zqbuKM0h1HuE5bcguxkNmALoUUsDV0rP-A@mail.gmail.com> <D38D6519.12F446%aretana@cisco.com> <CADnDZ888bhap3=Z9qL_N02Jshvm2BdDQNuNH1OrFrkMaNiBv_A@mail.gmail.com> <D38D9947.12F61F%aretana@cisco.com>
From: James Nguyen <james.huy.nguyen@gmail.com>
Date: Mon, 27 Jun 2016 13:31:22 -0400
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Subject: Re: [manet] Stephen Farrell's Block on charter-ietf-manet-03-05: (with BLOCK)
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--001a113ef634a3323c053645e37a
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Hi,

I notice that the MANET Management Document is back on the work item list,
but I thought that we wouldn't work on this as we discussed during the last
interim.  Please advise.

Work Items:
...

- Document outlining challenges and best practices for deploying and
managing MANET networks.


Milestones
...
- Nov 2016 MANET Management Document (Informational)

Thanks,

James


On Mon, Jun 20, 2016 at 3:18 PM, Alvaro Retana (aretana) <aretana@cisco.com=
>
wrote:

> On 6/20/16, 12:53 PM, "Abdussalam Baryun" <abdussalambaryun@gmail.com>
> wrote:
>
> AB:
>
> Hi!
>
> =E2=80=A6
>
>
>
>> As you can see, there are specific milestones listed at the bottom, whic=
h
>> are the focused work items the WG has agreed on.  I read the milestones =
as
>> an indication of priorities =E2=80=94 with the description in the charte=
r of what
>> the items are.
>>
>
> Milestones in my opinion are not priority indications, because in project
> management work-items mostly work in parallel, so milestones do not show
> priority, and in the past practice of MANET WG there are many later
> milestones that were advanced old milestones. I suggest that IETF and IES=
G
> change plans for approvals to add priority especial for groups like MANET
> WG.
>
>
> I think that those are great comments for the WG Chairs to keep in mind,
> after all, there are the ones responsible for the progress of the WG
> (rfc2418).   Besides using milestones, the WG Chairs can use any other
> project management methodology to keep the WG on track.
>
> On the other hand, I don't think the IEFT/IESG should make special
> provisions for any specific WG.  Having said that, the WG Chairs and I wi=
ll
> be working together to make sure the focus of the WG is applied to the
> agreed upon priorities.
>
>
> Some of your other suggestions (I left them below for reference) I think
> may fit in items that are already in the charter.  The WG may want to
> discuss others and their priority =E2=80=94 but that is something I will =
leave to
> the Chairs and the WG to decide.
>
> Thanks!
>
> Alvaro.
>
>
>
>
>> Do you have specific work items that you think belong on the list?  Or
>> maybe items that you think don't belong?  Or is the milestones indicatio=
n
>> of priorities not clear enough?
>>
>
> Yes, we worked MANET unicast manet routing; reactive and proactive,
> experimentals and standards but submitted successfully only the proactive
> as standard, so we need to work multicast manet routing now. So we need
> multicast reactive and multicast proactive routing, usually multicast
> routing is the most important routing in MANET environment. However, it w=
as
> a great plan that MANET WG started in the past with unicast and now the n=
ew
> issue is multicast routing. We need multicast for reactive routing and
> multicast for proactive, we got a proposal before for a multicast routing
> which was presented in IETF89 meeting.
>
> Therefore, this group needs to focus on two new routing: 1- Multicast
> Reactive Routing, 2- Multicast Proactive Routing, in addition we may add =
3-
> Hybrid Routing. The multicast routing is with high priority, because we
> only have very simple multicast, which MANET needs multicast because most
> use cases depend on group communication.
>
> IMHO, our group needs an information draft for MANET considerations and
> use cases. We had separate considerations in RFCs and we need to add uses
> of our past done protocols and looking to the future work use cases. This
> draft needs to work in parallel with updating RFC2501, which needs update
> specially that it ignore the new MANET packet and MANET interfaces. For
> example, in MANET WG the 5148 was just for jitter, and to solve issues
> related to a protocol, but we need a full picture of other considerations=
,
> and one place to have all consideration, not many documents with
> considerations. However, we need to separate a one item that covers MANET
> security considerations related to the MANET protocol, and security relat=
ed
> to the MANET packet. Therefore, my overall suggestion is that the work
> items with priority are as follows:
>
> 1- MANET considerations and use cases   (highest priority, p=3D1)
> 2- update of RFC2501     (p=3D2)
> 3- Multicast Reactive Routing (p=3D3)
> 4- Multicast Proactive Routing (p=3D3)
> 5- MANET security considerations (p=3D4)
> 6- Maintenance of OLSRv2 (p=3D3)
>
> Best Regards
> AB
>
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>
>


--=20
James Nguyen
Email: james.huy.nguyen@gmail.com

--001a113ef634a3323c053645e37a
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi,<br><br></div>I notice that the MANET Management D=
ocument is back on the work item list, but I thought that we wouldn&#39;t w=
ork on this as we discussed during the last interim.=C2=A0 Please advise.<b=
r><div><div><div><div><pre><span style=3D"font-family:arial,helvetica,sans-=
serif">Work Items:
...

- Document outlining challenges and best practices for deploying and=20
managing MANET networks.=C2=A0 </span></pre><br>Milestones<br>...<br>- Nov =
2016
	 =20
       =20
       =20
	  MANET Management Document (Informational)
	 =20
        <br><br></div><div>Thanks,<br><br></div><div>James<br></div><div><b=
r></div></div></div></div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Mon, Jun 20, 2016 at 3:18 PM, Alvaro Retana (aretana) <=
span dir=3D"ltr">&lt;<a href=3D"mailto:aretana@cisco.com" target=3D"_blank"=
>aretana@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif"><span class=3D"">
<div>On 6/20/16, 12:53 PM, &quot;Abdussalam Baryun&quot; &lt;<a href=3D"mai=
lto:abdussalambaryun@gmail.com" target=3D"_blank">abdussalambaryun@gmail.co=
m</a>&gt; wrote:</div>
<div><br>
</div>
<div>AB:</div>
<div><br>
</div>
<div>Hi!</div>
<div><br>
</div>
</span><div>=E2=80=A6</div><span class=3D"">
<span>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<div><br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div><br>
</div>
<div>As you can see, there are specific milestones listed at the bottom, wh=
ich are the focused work items the WG has agreed on.=C2=A0 I read the miles=
tones as an indication of priorities =E2=80=94 with the description in the =
charter of what the items are.</div>
</div>
</blockquote>
<div><br>
</div>
<div>Milestones in my opinion are not priority indications, because in proj=
ect management work-items mostly work in parallel, so milestones do not sho=
w priority, and in the past practice of MANET WG there are many later miles=
tones that were advanced old milestones.
 I suggest that IETF and IESG change plans for approvals to add priority es=
pecial for groups like MANET WG.</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
</span><div>I think that those are great comments for the WG Chairs to keep=
 in mind, after all, there are the ones responsible for the progress of the=
 WG (rfc2418). =C2=A0 Besides using milestones, the WG Chairs can use any o=
ther project management methodology to keep
 the WG on track.</div>
<div><br>
</div>
<div>On the other hand, I don&#39;t think the IEFT/IESG should make special=
 provisions for any specific WG.=C2=A0 Having said that, the WG Chairs and =
I will be working together to make sure the focus of the WG is applied to t=
he agreed upon priorities.</div>
<div><br>
</div>
<div><br>
</div>
<div>Some of your other suggestions (I left them below for reference) I thi=
nk may fit in items that are already in the charter.=C2=A0 The WG may want =
to discuss others and their priority =E2=80=94 but that is something I will=
 leave to the Chairs and the WG to decide.</div>
<div><br>
</div>
<div>Thanks!</div><span class=3D"HOEnZb"><font color=3D"#888888">
<div><br>
</div>
<div>Alvaro.</div></font></span><span class=3D"">
<div><br>
</div>
<div><br>
</div>
<span>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<div><br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div><br>
</div>
<div>Do you have specific work items that you think belong on the list?=C2=
=A0 Or maybe items that you think don&#39;t belong?=C2=A0 Or is the milesto=
nes indication of priorities not clear enough?</div>
</div>
</blockquote>
<div><br>
</div>
<div>Yes, we worked MANET unicast manet routing; reactive and proactive, ex=
perimentals and standards but submitted successfully only the proactive as =
standard, so we need to work multicast manet routing now. So we need multic=
ast reactive and multicast proactive
 routing, usually multicast routing is the most important routing in MANET =
environment. However, it was a great plan that MANET WG started in the past=
 with unicast and now the new issue is multicast routing. We need multicast=
 for reactive routing and multicast
 for proactive, we got a proposal before for a multicast routing which was =
presented in IETF89 meeting.
<br>
<br>
</div>
<div>Therefore, this group needs to focus on two new routing: 1- Multicast =
Reactive Routing, 2- Multicast Proactive Routing, in addition we may add 3-=
 Hybrid Routing. The multicast routing is with high priority, because we on=
ly have very simple multicast, which
 MANET needs multicast because most use cases depend on group communication=
. <br>
<br>
</div>
<div>IMHO, our group needs an information draft for MANET considerations an=
d use cases. We had separate considerations in RFCs and we need to add uses=
 of our past done protocols and looking to the future work use cases. This =
draft needs to work in parallel
 with updating RFC2501, which needs update specially that it ignore the new=
 MANET packet and MANET interfaces. For example, in MANET WG the 5148 was j=
ust for jitter, and to solve issues related to a protocol, but we need a fu=
ll picture of other considerations,
 and one place to have all consideration, not many documents with considera=
tions. However, we need to separate a one item that covers MANET security c=
onsiderations related to the MANET protocol, and security related to the MA=
NET packet. Therefore, my overall
 suggestion is that the work items with priority are as follows:<br>
<br>
</div>
<div>1- MANET considerations and use cases=C2=A0=C2=A0 (highest priority, p=
=3D1)<br>
</div>
<div>2- update of RFC2501=C2=A0=C2=A0=C2=A0=C2=A0 (p=3D2)<br>
</div>
<div>3- Multicast Reactive Routing (p=3D3)<br>
</div>
<div>4- Multicast Proactive Routing (p=3D3)<br>
</div>
<div>5- MANET security considerations (p=3D4)<br>
</div>
<div>6- Maintenance of OLSRv2 (p=3D3)<br>
<br>
</div>
<div>Best Regards<br>
</div>
<div>AB</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
</span></div>

<br>_______________________________________________<br>
manet mailing list<br>
<a href=3D"mailto:manet@ietf.org">manet@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/manet" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/manet</a><br>
<br></blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail=
_signature" data-smartmail=3D"gmail_signature">James Nguyen<br>Email: <a hr=
ef=3D"mailto:james.huy.nguyen@gmail.com" target=3D"_blank">james.huy.nguyen=
@gmail.com</a></div>
</div>

--001a113ef634a3323c053645e37a--


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Mirja KÃ¼hlewind has entered the following ballot position for
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Sorry for my late comment:

On "reporting statistics by traffic classification" MANET should probably
cooperate with IPPM. Should that be mentioned in the charter?



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On 6/28/16, 7:03 AM, "Mirja Kuehlewind" <ietf@kuehlewind.net> wrote:

>On "reporting statistics by traffic classification" MANET should probably
>cooperate with IPPM. Should that be mentioned in the charter?

Done!  Thanks!!

Alvaro.


From nobody Thu Jun 30 00:11:36 2016
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Benoit Claise has entered the following ballot position for
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for this addition:
- Document outlining challenges and best practices for deploying and 
managing MANET networks. 

This is long overdue, and promised for so many years.

Regards, Benoit



From nobody Thu Jun 30 02:24:27 2016
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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: Benoit Claise <bclaise@cisco.com>
Thread-Topic: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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Given that the only standards track routing protocol that has been defined =
in the group is OLSRv2, there was an OLSRv2 management draft produced (I wa=
s not an author). It was blocked from proceeding by the then AD (I forget w=
hich one).

So I think the suggestion that promises were made (and implicitly, that the=
y were broken) is rather unfair, at least to those authors (two of the OLSR=
v2 author team). There wasn't even the suggestion that the document evolve =
to something else, just blocked.

-- =

Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T: =A0+44 (0)1245 242194 =A0| =A0E: chris.dearlove@baesystems.com

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

-----Original Message-----
From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Benoit Claise
Sent: 30 June 2016 08:12
To: The IESG
Cc: manet@ietf.org; manet-chairs@ietf.org
Subject: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: =
(with COMMENT)

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Benoit Claise has entered the following ballot position for
charter-ietf-manet-03-07: No Objection

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 addresses included in the To and CC lines. (Feel free to cut this introduc=
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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for this addition:
- Document outlining challenges and best practices for deploying and managi=
ng MANET networks. =


This is long overdue, and promised for so many years.

Regards, Benoit


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


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From nobody Thu Jun 30 08:20:47 2016
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From: Ulrich Herberg <ulrich@herberg.name>
Date: Thu, 30 Jun 2016 08:20:42 -0700
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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I agree with Christopher that this is an unfair statement. We
delivered what was promised, but Benoit had a much wider document in
mind, despite the fact that no other standard routing protocols have
been developed in this WG. I am not sure how to produce a document
that describes to how manage MANETs in general for standard protocols
that don't even exist.
So I also don't know how this item in the charter will be addressed.
And who will write that document? I can't speak for the other
co-author of the management draft we have written (and which was
killed by AD), but I have no interest in writing a new draft that
addresses best practices for hypothetical, not existing routing
standards in MANETs. We can resubmit our draft explaining best
practices for how to manage OLSRv2 networks if requested by the AD,
since that is what this WG knows how to do.

Regards
Ulrich

On Thu, Jun 30, 2016 at 2:24 AM, Dearlove, Christopher (UK)
<chris.dearlove@baesystems.com> wrote:
> Given that the only standards track routing protocol that has been define=
d in the group is OLSRv2, there was an OLSRv2 management draft produced (I =
was not an author). It was blocked from proceeding by the then AD (I forget=
 which one).
>
> So I think the suggestion that promises were made (and implicitly, that t=
hey were broken) is rather unfair, at least to those authors (two of the OL=
SRv2 author team). There wasn't even the suggestion that the document evolv=
e to something else, just blocked.
>
> --
> Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> _________________________________________________________________________=
_
>
> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddo=
w, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>
> -----Original Message-----
> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Benoit Claise
> Sent: 30 June 2016 08:12
> To: The IESG
> Cc: manet@ietf.org; manet-chairs@ietf.org
> Subject: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07=
: (with COMMENT)
>
> ----------------------! WARNING ! ---------------------- This message ori=
ginates from outside our organisation, either from an external partner or f=
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> Follow the 'Report Suspicious Emails' link on IT matters for instructions=
 on reporting suspicious email messages.
> --------------------------------------------------------
>
> *** WARNING ***
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>
>
> Benoit Claise has entered the following ballot position for
> charter-ietf-manet-03-07: No Objection
>
> When responding, please keep the subject line intact and reply to all ema=
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>
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/charter-ietf-manet/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thank you for this addition:
> - Document outlining challenges and best practices for deploying and mana=
ging MANET networks.
>
> This is long overdue, and promised for so many years.
>
> Regards, Benoit
>
>
> _______________________________________________
> manet mailing list
> manet@ietf.org
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>
>
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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>, "Benoit Claise (bclaise)" <bclaise@cisco.com>
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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On 6/30/16, 5:24 AM, "manet on behalf of Dearlove, Christopher (UK)"
<manet-bounces@ietf.org on behalf of chris.dearlove@baesystems.com> wrote:

Christopher:

Hi!

>Given that the only standards track routing protocol that has been
>defined in the group is OLSRv2, there was an OLSRv2 management draft
>produced (I was not an author). It was blocked from proceeding by the
>then AD (I forget which one).

The document wasn't blocked, I declared it "Dead" -- which basically means
that even though publication was requested the IESG is no longer tracking
it.


>So I think the suggestion that promises were made (and implicitly, that
>they were broken) is rather unfair, at least to those authors (two of the
>OLSRv2 author team). There wasn't even the suggestion that the document
>evolve to something else, just blocked.

If anyone else is interested, take a look at the history of the document,
which includes a note about the reasoning at the time:
https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-management-snapsho
t/history/


Alvaro.


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Ulrich Herberg <ulrich@herberg.name>, "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
Thread-Topic: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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On 6/30/16, 11:20 AM, "manet on behalf of Ulrich Herberg"
<manet-bounces@ietf.org on behalf of ulrich@herberg.name> wrote:

Ulrich:

Hi!

>I am not sure how to produce a document
>that describes to how manage MANETs in general for standard protocols
>that don't even exist.
>So I also don't know how this item in the charter will be addressed.

Please note that the charter item says: "Document outlining challenges and
best practices for deploying and
managing MANET networks."

It doesn't say anything about a network using protocol A or protocol B.
You and I (and the rest of the WG of course) know that the protocols
developed in this WG are not the only manet protocols that exist -- in
fact, the protocols discussed in the WG are not the only protocols that
exist.  And a routing protocol is not the only part that needs management
in a network.  To be clear, the item is not about managing OLSRv2 in a
network (or any other protocol).

MANET networks are not fully understood outside this WG, which sometimes
results in improper (or even unrealistic) expectations of what is
required/possible.  This document gives the WG the opportunity to clearly
spell out the "challenges and best practices".  Even though the WG is
inside the routing area and generally focuses on routing protocols, it is
clearly the one place where people with deployment and management of MANET
networks work -- which is why it is chartered with this work.

I am sure that the WG will benefit from the experience of deploying
OLSRv2, which obviously should be taken into consideration.  However, the
intent goes beyond a single protocol...

Thanks!

Alvaro.


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From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Alvaro Retana (aretana)" <aretana@cisco.com>, "Benoit Claise (bclaise)" <bclaise@cisco.com>
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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Sorry, I'm sure there is a subtlety in being declared dead rather than bloc=
ked, but I don't know what it is. But as I said, I wasn't an author, so was=
n't involved in any detailed discussions over why it died.

-- =

Christopher Dearlove
Senior Principal Engineer
BAE Systems Applied Intelligence Laboratories
__________________________________________________________________________

T: =A0+44 (0)1245 242194 =A0| =A0E: chris.dearlove@baesystems.com

BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow,=
 Chelmsford, Essex CM2 8HN.
www.baesystems.com/ai
BAE Systems Applied Intelligence Limited
Registered in England & Wales No: 01337451
Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP

-----Original Message-----
From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Alvaro Retana (are=
tana)
Sent: 30 June 2016 16:24
To: Dearlove, Christopher (UK); Benoit Claise (bclaise)
Cc: manet@ietf.org; manet-chairs@ietf.org
Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-=
07: (with COMMENT)

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On 6/30/16, 5:24 AM, "manet on behalf of Dearlove, Christopher (UK)"
<manet-bounces@ietf.org on behalf of chris.dearlove@baesystems.com> wrote:

Christopher:

Hi!

>Given that the only standards track routing protocol that has been =

>defined in the group is OLSRv2, there was an OLSRv2 management draft =

>produced (I was not an author). It was blocked from proceeding by the =

>then AD (I forget which one).

The document wasn't blocked, I declared it "Dead" -- which basically means =
that even though publication was requested the IESG is no longer tracking i=
t.


>So I think the suggestion that promises were made (and implicitly, that =

>they were broken) is rather unfair, at least to those authors (two of =

>the
>OLSRv2 author team). There wasn't even the suggestion that the document =

>evolve to something else, just blocked.

If anyone else is interested, take a look at the history of the document, w=
hich includes a note about the reasoning at the time:
https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-management-snapsho
t/history/


Alvaro.

_______________________________________________
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From: Justin Dean <bebemaster@gmail.com>
Date: Thu, 30 Jun 2016 13:45:50 -0400
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Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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There is value in providing a document which can help explain to the wider
IETF what MANET is and can and can't do.  What the limitations are and
possible gaps in technologies that may possibly be.  We have previously
produced two different management documents both of which didn't come to
fruition.  I think something of a mixture of the two as well as details
regarding HOW people have deployed and managed these networks and what are
the limitations/advantages/disadvantages in those deployments.  Parts of
the OLSRv2 management draft can be taken as concrete example use cases
using the only standard MANET protocol but there are properties of a MANET
that are independent of the protocol: interment connectivity, address
management, transit issues, protocol management, non-typical "link"
properties, etc.  We should be able to address what these challenges are
and how we (those that have deployed MANET networks) have overcome those
challenges.

I think this is an opportunity and we have most of the pieces and all of
the right people already.

Justin

On Thu, Jun 30, 2016 at 12:06 PM, Alvaro Retana (aretana) <aretana@cisco.com
> wrote:

> On 6/30/16, 11:20 AM, "manet on behalf of Ulrich Herberg"
> <manet-bounces@ietf.org on behalf of ulrich@herberg.name> wrote:
>
> Ulrich:
>
> Hi!
>
> >I am not sure how to produce a document
> >that describes to how manage MANETs in general for standard protocols
> >that don't even exist.
> >So I also don't know how this item in the charter will be addressed.
>
> Please note that the charter item says: "Document outlining challenges and
> best practices for deploying and
> managing MANET networks."
>
> It doesn't say anything about a network using protocol A or protocol B.
> You and I (and the rest of the WG of course) know that the protocols
> developed in this WG are not the only manet protocols that exist -- in
> fact, the protocols discussed in the WG are not the only protocols that
> exist.  And a routing protocol is not the only part that needs management
> in a network.  To be clear, the item is not about managing OLSRv2 in a
> network (or any other protocol).
>
> MANET networks are not fully understood outside this WG, which sometimes
> results in improper (or even unrealistic) expectations of what is
> required/possible.  This document gives the WG the opportunity to clearly
> spell out the "challenges and best practices".  Even though the WG is
> inside the routing area and generally focuses on routing protocols, it is
> clearly the one place where people with deployment and management of MANET
> networks work -- which is why it is chartered with this work.
>
> I am sure that the WG will benefit from the experience of deploying
> OLSRv2, which obviously should be taken into consideration.  However, the
> intent goes beyond a single protocol...
>
> Thanks!
>
> Alvaro.
>
>

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<div dir=3D"ltr">There is value in providing a document which can help expl=
ain to the wider IETF what MANET is and can and can&#39;t do.=C2=A0 What th=
e limitations are and possible gaps in technologies that may possibly be.=
=C2=A0 We have previously produced two different management documents both =
of which didn&#39;t come to fruition.=C2=A0 I think something of a mixture =
of the two as well as details regarding HOW people have deployed and manage=
d these networks and what are the limitations/advantages/disadvantages in t=
hose deployments.=C2=A0 Parts of the OLSRv2 management draft can be taken a=
s concrete example use cases using the only standard MANET protocol but the=
re are properties of a MANET that are independent of the protocol: intermen=
t connectivity, address management, transit issues, protocol management, no=
n-typical &quot;link&quot; properties, etc.=C2=A0 We should be able to addr=
ess what these challenges are and how we (those that have deployed MANET ne=
tworks) have overcome those challenges.=C2=A0<br><br>I think this is an opp=
ortunity and we have most of the pieces and all of the right people already=
.<br><br>Justin</div><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Thu, Jun 30, 2016 at 12:06 PM, Alvaro Retana (aretana) <span dir=3D"=
ltr">&lt;<a href=3D"mailto:aretana@cisco.com" target=3D"_blank">aretana@cis=
co.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=
=3D"">On 6/30/16, 11:20 AM, &quot;manet on behalf of Ulrich Herberg&quot;<b=
r>
&lt;<a href=3D"mailto:manet-bounces@ietf.org">manet-bounces@ietf.org</a> on=
 behalf of <a href=3D"mailto:ulrich@herberg.name">ulrich@herberg.name</a>&g=
t; wrote:<br>
<br>
</span>Ulrich:<br>
<br>
Hi!<br>
<span class=3D""><br>
&gt;I am not sure how to produce a document<br>
&gt;that describes to how manage MANETs in general for standard protocols<b=
r>
&gt;that don&#39;t even exist.<br>
&gt;So I also don&#39;t know how this item in the charter will be addressed=
.<br>
<br>
</span>Please note that the charter item says: &quot;Document outlining cha=
llenges and<br>
<span class=3D"">best practices for deploying and<br>
managing MANET networks.&quot;<br>
<br>
</span>It doesn&#39;t say anything about a network using protocol A or prot=
ocol B.<br>
You and I (and the rest of the WG of course) know that the protocols<br>
developed in this WG are not the only manet protocols that exist -- in<br>
fact, the protocols discussed in the WG are not the only protocols that<br>
exist.=C2=A0 And a routing protocol is not the only part that needs managem=
ent<br>
in a network.=C2=A0 To be clear, the item is not about managing OLSRv2 in a=
<br>
network (or any other protocol).<br>
<br>
MANET networks are not fully understood outside this WG, which sometimes<br=
>
results in improper (or even unrealistic) expectations of what is<br>
required/possible.=C2=A0 This document gives the WG the opportunity to clea=
rly<br>
spell out the &quot;challenges and best practices&quot;.=C2=A0 Even though =
the WG is<br>
inside the routing area and generally focuses on routing protocols, it is<b=
r>
clearly the one place where people with deployment and management of MANET<=
br>
networks work -- which is why it is chartered with this work.<br>
<br>
I am sure that the WG will benefit from the experience of deploying<br>
OLSRv2, which obviously should be taken into consideration.=C2=A0 However, =
the<br>
intent goes beyond a single protocol...<br>
<br>
Thanks!<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Alvaro.<br>
<br>
</font></span></blockquote></div><br></div>

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From: Thomas Heide Clausen <ietf@thomasclausen.org>
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To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/kx7hgkUI7VoPjSRbxmSthMUSe8I>
Cc: "Benoit Claise \(bclaise\)" <bclaise@cisco.com>, "manet@ietf.org" <manet@ietf.org>, "manet-chairs@ietf.org" <manet-chairs@ietf.org>
Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (with COMMENT)
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> On 30 Jun 2016, at 18:22, Dearlove, Christopher (UK) <chris.dearlove@baesy=
stems.com> wrote:
>=20
> Sorry, I'm sure there is a subtlety in being declared dead rather than blo=
cked, but I don't know what it is. But as I said, I wasn't an author, so was=
n't involved in any detailed discussions over why it died.

I am an author of this document. I remember the process of it being written,=
 from its inception in discussion w/ the AD who requested it, and until it w=
as declared dead by another AD -- thus preventing (or, blocking) the IESG fr=
om discussing it.

I believe that the history and the reasons, as have been presented in this d=
iscussion, are, at best, *very* partial.

You wrote:

> "So I think the suggestion that promises were made (and implicitly, that
> they were broken) is rather unfair, at least to those authors (two of the
> OLSRv2 author team). "


As one of the authors, I do indeed find that suggestion to be both unfair an=
d offensive.

Thomas

> --=20
> Christopher Dearlove
> Senior Principal Engineer
> BAE Systems Applied Intelligence Laboratories
> __________________________________________________________________________=

>=20
> T:  +44 (0)1245 242194  |  E: chris.dearlove@baesystems.com
>=20
> BAE Systems Applied Intelligence, Chelmsford Technology Park, Great Baddow=
, Chelmsford, Essex CM2 8HN.
> www.baesystems.com/ai
> BAE Systems Applied Intelligence Limited
> Registered in England & Wales No: 01337451
> Registered Office: Surrey Research Park, Guildford, Surrey, GU2 7YP
>=20
> -----Original Message-----
> From: manet [mailto:manet-bounces@ietf.org] On Behalf Of Alvaro Retana (ar=
etana)
> Sent: 30 June 2016 16:24
> To: Dearlove, Christopher (UK); Benoit Claise (bclaise)
> Cc: manet@ietf.org; manet-chairs@ietf.org
> Subject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03=
-07: (with COMMENT)
>=20
> ----------------------! WARNING ! ---------------------- This message orig=
inates from outside our organisation, either from an external partner or fro=
m the internet.
> Consider carefully whether you should click on any links, open any attachm=
ents or reply.
> Follow the 'Report Suspicious Emails' link on IT matters for instructions o=
n reporting suspicious email messages.
> --------------------------------------------------------
>=20
> *** WARNING ***
> EXTERNAL EMAIL -- This message originates from outside our organization.
>=20
>=20
> On 6/30/16, 5:24 AM, "manet on behalf of Dearlove, Christopher (UK)"
> <manet-bounces@ietf.org on behalf of chris.dearlove@baesystems.com> wrote:=

>=20
> Christopher:
>=20
> Hi!
>=20
>> Given that the only standards track routing protocol that has been=20
>> defined in the group is OLSRv2, there was an OLSRv2 management draft=20
>> produced (I was not an author). It was blocked from proceeding by the=20
>> then AD (I forget which one).
>=20
> The document wasn't blocked, I declared it "Dead" -- which basically means=
 that even though publication was requested the IESG is no longer tracking i=
t.
>=20
>=20
>> So I think the suggestion that promises were made (and implicitly, that=20=

>> they were broken) is rather unfair, at least to those authors (two of=20
>> the
>> OLSRv2 author team). There wasn't even the suggestion that the document=20=

>> evolve to something else, just blocked.
>=20
> If anyone else is interested, take a look at the history of the document, w=
hich includes a note about the reasoning at the time:
> https://datatracker.ietf.org/doc/draft-ietf-manet-olsrv2-management-snapsh=
o
> t/history/
>=20
>=20
> Alvaro.
>=20
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet
>=20
>=20
> ********************************************************************
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> ********************************************************************
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><span></span></div><div><div><span></s=
pan></div><div><div><br></div><div>On 30 Jun 2016, at 18:22, Dearlove, Chris=
topher (UK) &lt;<a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearl=
ove@baesystems.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><di=
v><span>Sorry, I'm sure there is a subtlety in being declared dead rather th=
an blocked, but I don't know what it is. But as I said, I wasn't an author, s=
o wasn't involved in any detailed discussions over why it died.</span><br><s=
pan></span><br></div></blockquote><div><br></div>I am an author of this docu=
ment. I remember the process of it being written, from its inception in disc=
ussion w/ the AD who requested it, and until it was declared dead by another=
 AD -- thus preventing (or, blocking) the IESG from discussing it.<div><br><=
/div><div>I believe that the history and the reasons, as have been presented=
 in this discussion, are, at best, *very* partial.</div><div><br></div><div>=
You wrote:</div><div><br></div><div><div preoffsettop=3D"455"><blockquote ty=
pe=3D"cite" preoffsettop=3D"455"><font color=3D"#000000"><span style=3D"back=
ground-color: rgba(255, 255, 255, 0);">"So I think the suggestion that promi=
ses were made (and implicitly, that<br></span></font></blockquote><blockquot=
e type=3D"cite" preoffsettop=3D"481"><font color=3D"#000000"><span style=3D"=
background-color: rgba(255, 255, 255, 0);">they were broken) is rather unfai=
r, at least to those authors (two of the<br></span></font></blockquote><bloc=
kquote type=3D"cite" preoffsettop=3D"507"><font color=3D"#000000"><span styl=
e=3D"background-color: rgba(255, 255, 255, 0);">OLSRv2 author team). "</span=
></font></blockquote></div></div><div><br></div><div>As one of the authors, I=
 do indeed find that suggestion to be both unfair and offensive.</div><div><=
br></div><div>Thomas</div><div><br><blockquote type=3D"cite"><div><span>-- <=
/span><br><span>Christopher Dearlove</span><br><span>Senior Principal Engine=
er</span><br><span>BAE Systems Applied Intelligence Laboratories</span><br><=
span>_______________________________________________________________________=
___</span><br><span></span><br><span>T: &nbsp;+44 (0)1245 242194 &nbsp;| &nb=
sp;E: <a href=3D"mailto:chris.dearlove@baesystems.com">chris.dearlove@baesys=
tems.com</a></span><br><span></span><br><span>BAE Systems Applied Intelligen=
ce, Chelmsford Technology Park, Great Baddow, Chelmsford, Essex CM2 8HN.</sp=
an><br><span><a href=3D"http://www.baesystems.com/ai">www.baesystems.com/ai<=
/a></span><br><span>BAE Systems Applied Intelligence Limited</span><br><span=
>Registered in England &amp; Wales No: 01337451</span><br><span>Registered O=
ffice: Surrey Research Park, Guildford, Surrey, GU2 7YP</span><br><span></sp=
an><br><span>-----Original Message-----</span><br><span>From: manet [<a href=
=3D"mailto:manet-bounces@ietf.org">mailto:manet-bounces@ietf.org</a>] On Beh=
alf Of Alvaro Retana (aretana)</span><br><span>Sent: 30 June 2016 16:24</spa=
n><br><span>To: Dearlove, Christopher (UK); Benoit Claise (bclaise)</span><b=
r><span>Cc: <a href=3D"mailto:manet@ietf.org">manet@ietf.org</a>; <a href=3D=
"mailto:manet-chairs@ietf.org">manet-chairs@ietf.org</a></span><br><span>Sub=
ject: Re: [manet] Benoit Claise's No Objection on charter-ietf-manet-03-07: (=
with COMMENT)</span><br><span></span><br><span>----------------------! WARNI=
NG ! ---------------------- This message originates from outside our organis=
ation, either from an external partner or from the internet.</span><br><span=
>Consider carefully whether you should click on any links, open any attachme=
nts or reply.</span><br><span>Follow the 'Report Suspicious Emails' link on I=
T matters for instructions on reporting suspicious email messages.</span><br=
><span>--------------------------------------------------------</span><br><s=
pan></span><br><span>*** WARNING ***</span><br><span>EXTERNAL EMAIL -- This m=
essage originates from outside our organization.</span><br><span></span><br>=
<span></span><br><span>On 6/30/16, 5:24 AM, "manet on behalf of Dearlove, Ch=
ristopher (UK)"</span><br><span>&lt;<a href=3D"mailto:manet-bounces@ietf.org=
">manet-bounces@ietf.org</a> on behalf of <a href=3D"mailto:chris.dearlove@b=
aesystems.com">chris.dearlove@baesystems.com</a>&gt; wrote:</span><br><span>=
</span><br><span>Christopher:</span><br><span></span><br><span>Hi!</span><br=
><span></span><br><blockquote type=3D"cite"><span>Given that the only standa=
rds track routing protocol that has been </span><br></blockquote><blockquote=
 type=3D"cite"><span>defined in the group is OLSRv2, there was an OLSRv2 man=
agement draft </span><br></blockquote><blockquote type=3D"cite"><span>produc=
ed (I was not an author). It was blocked from proceeding by the </span><br><=
/blockquote><blockquote type=3D"cite"><span>then AD (I forget which one).</s=
pan><br></blockquote><span></span><br><span>The document wasn't blocked, I d=
eclared it "Dead" -- which basically means that even though publication was r=
equested the IESG is no longer tracking it.</span><br><span></span><br><span=
></span><br><blockquote type=3D"cite"><span>So I think the suggestion that p=
romises were made (and implicitly, that </span><br></blockquote><blockquote t=
ype=3D"cite"><span>they were broken) is rather unfair, at least to those aut=
hors (two of </span><br></blockquote><blockquote type=3D"cite"><span>the</sp=
an><br></blockquote><blockquote type=3D"cite"><span>OLSRv2 author team). The=
re wasn't even the suggestion that the document </span><br></blockquote><blo=
ckquote type=3D"cite"><span>evolve to something else, just blocked.</span><b=
r></blockquote><span></span><br><span>If anyone else is interested, take a l=
ook at the history of the document, which includes a note about the reasonin=
g at the time:</span><br><span><a href=3D"https://datatracker.ietf.org/doc/d=
raft-ietf-manet-olsrv2-management-snapsho">https://datatracker.ietf.org/doc/=
draft-ietf-manet-olsrv2-management-snapsho</a></span><br><span>t/history/</s=
pan><br><span></span><br><span></span><br><span>Alvaro.</span><br><span></sp=
an><br><span>_______________________________________________</span><br><span=
>manet mailing list</span><br><span><a href=3D"mailto:manet@ietf.org">manet@=
ietf.org</a></span><br><span><a href=3D"https://www.ietf.org/mailman/listinf=
o/manet">https://www.ietf.org/mailman/listinfo/manet</a></span><br><span></s=
pan><br><span></span><br><span>*********************************************=
***********************</span><br><span>This email and any attachments are c=
onfidential to the intended</span><br><span>recipient and may also be privil=
eged. If you are not the intended</span><br><span>recipient please delete it=
 from your system and notify the sender.</span><br><span>You should not copy=
 it or use it for any purpose nor disclose or</span><br><span>distribute its=
 contents to any other person.</span><br><span>*****************************=
***************************************</span><br><span></span><br><span>___=
____________________________________________</span><br><span>manet mailing l=
ist</span><br><span><a href=3D"mailto:manet@ietf.org">manet@ietf.org</a></sp=
an><br><span><a href=3D"https://www.ietf.org/mailman/listinfo/manet">https:/=
/www.ietf.org/mailman/listinfo/manet</a></span><br></div></blockquote></div>=
</div></div></body></html>=

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From: Jiazi YI <ietf@jiaziyi.com>
Date: Fri, 1 Jul 2016 01:05:24 +0200
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Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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--001a114a69b2d743d9053686e767
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Hi,

Regarding the use of source routing header in IPv6 and the reference to
RFC6554, we have contacted the 6man chairs.

The answer from Ole (one of the chairs) was that he didn't see why it can't
be used, and suggested the experimental code points of the IPv6 Routing
Types.

So in the next revision of the olsrv2-multipath, we will:

       - Use the experimental code point of IPv6 Routing Types for SRH.

       - Have a well scoped reference to RFC6554: for example, for SRH
format, use section 3, for SRH processing, use section 4, etc. Other than
that, the olsrv2-multipath would be self-contained.

       - Have a well defined scope of the use of the SRH: only the
OLSRv2/MP-OLSRv2 routing domain.

Any other comments on the approach?

best

Jiazi

On Fri, Jun 24, 2016 at 1:40 PM, Alvaro Retana (aretana) <aretana@cisco.com=
>
wrote:

> On 6/24/16, 5:16 AM, "yi.jiazi@gmail.com on behalf of Jiazi YI" <
> yi.jiazi@gmail.com on behalf of ietf@jiaziyi.com> wrote:
>
> Hi!
>
> Of course, As a WG, the priority is achieving the milestones, but I don't
> think it would preclude having extensions to OLSRv2, which is part of the
> charter also. In fact, IIRC, during the recharter discussion, several
> extensions for OLSRv2 were proposed. The WG finished with using the term
> "The MANET WG is responsible for the *maintenance* of OLSRv2 [RFC 7181],
> NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444]=
,
> and their *extensions*.", instead of listing possible extensions
> explicitly.
>
>
> As I said: "To be clear: I'm not asking you not to do this work, I want
> the WG Chairs to prioritize appropriately=E2=80=A6"  That's it!  If the W=
G wants to
> take this work on, I don't have a problem =E2=80=94 it is with in the cha=
rter.
> Let's just not forget about the other work we have=E2=80=A6
>
> The second part of the point I tried to make was, I think, more important=
:
>  extensions to IPv6 are not within the manet WG's charter, but they
> belong to 6man.  It would probably be more effective if the source routin=
g
> work was in the Standards Track.  I'm assuming that Multi-path is just on=
e
> use case for source routing, but there are probably more.  I also wrote:
> "[*] I doubt that 6man will want to put in an extension (even if it's
> already defied in RFC6554) for an Experimental effort.  I of course may b=
e
> wrong and the Experimental nature may make it easier in their eyes to
> simply reference RFC6554."
>
> Note that what I'm suggesting is not to put the Multi-path work in the
> Standards Track (that is a separate discussion) =E2=80=94 but to justify =
source
> routing for MANET networks as a larger need (including multi-path, but
> bigger than that).
>
> Thanks!
>
> Alvaro.
>

--001a114a69b2d743d9053686e767
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,=C2=A0<div><br></div><div>Regarding the use of source r=
outing header in IPv6 and the reference to RFC6554, we have contacted the 6=
man chairs.=C2=A0</div><div><br></div><div>The answer from Ole (one of the =
chairs) was that he didn&#39;t see why it can&#39;t be used, and suggested =
the experimental code points of the IPv6 Routing Types.=C2=A0</div><div><br=
></div><div>So in the next revision of the olsrv2-multipath, we will:</div>=
<div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0- Use the experimental code =
point of IPv6 Routing Types for SRH.=C2=A0</div><div><br></div><div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0-=C2=A0<span style=3D"color:rgb(0,0,0);font-family:Helv=
etica;font-size:12px">Have a well scoped reference to RFC6554: for example,=
 for SRH format, use section 3, for SRH processing, use section 4, etc. Oth=
er than that, the olsrv2-multipath would be self-contained.=C2=A0</span></d=
iv><div><span style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12p=
x"><br></span></div><div><span style=3D"color:rgb(0,0,0);font-family:Helvet=
ica;font-size:12px">=C2=A0 =C2=A0 =C2=A0 =C2=A0-=C2=A0</span><font color=3D=
"#000000" face=3D"Helvetica"><span style=3D"font-size:12px">Have a well def=
ined scope of the use of the SRH: only the OLSRv2/MP-OLSRv2 routing domain.=
</span></font></div><div><font color=3D"#000000" face=3D"Helvetica"><span s=
tyle=3D"font-size:12px"><br></span></font></div><div><font color=3D"#000000=
" face=3D"Helvetica"><span style=3D"font-size:12px">Any other comments on t=
he approach?</span></font></div><div><font color=3D"#000000" face=3D"Helvet=
ica"><span style=3D"font-size:12px"><br></span></font></div><div><font colo=
r=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12px">best</span>=
</font></div><div><font color=3D"#000000" face=3D"Helvetica"><span style=3D=
"font-size:12px"><br></span></font></div><div><font color=3D"#000000" face=
=3D"Helvetica"><span style=3D"font-size:12px">Jiazi</span></font></div></di=
v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Jun 24,=
 2016 at 1:40 PM, Alvaro Retana (aretana) <span dir=3D"ltr">&lt;<a href=3D"=
mailto:aretana@cisco.com" target=3D"_blank">aretana@cisco.com</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex">



<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>On 6/24/16, 5:16 AM, &quot;<a href=3D"mailto:yi.jiazi@gmail.com" targe=
t=3D"_blank">yi.jiazi@gmail.com</a> on behalf of Jiazi YI&quot; &lt;<a href=
=3D"mailto:yi.jiazi@gmail.com" target=3D"_blank">yi.jiazi@gmail.com</a> on =
behalf of
<a href=3D"mailto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&=
gt; wrote:</div>
<div><br>
</div>
<div>Hi!</div><span class=3D"">
<span>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
Of course, As a WG, the priority is achieving the milestones, but I don&#39=
;t think it would preclude having extensions to OLSRv2, which is part of th=
e charter also. In fact, IIRC, during the recharter discussion, several ext=
ensions for OLSRv2 were proposed. The
 WG finished with using the term &quot;The MANET WG is responsible for the<=
span>=C2=A0</span><b>maintenance</b><span>=C2=A0</span>of OLSRv2 [RFC 7181]=
,</div>
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],=
=C2=A0</div>
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
and their<span>=C2=A0</span><b>extensions</b>.&quot;, instead of listing po=
ssible extensions explicitly.=C2=A0</div>
</blockquote>
</span>
<div><br>
</div>
</span><div>As I said: &quot;To be clear: I&#39;m not asking you not to do =
this work, I want the WG Chairs to prioritize appropriately=E2=80=A6&quot; =
=C2=A0That&#39;s it!=C2=A0 If the WG wants to take this work on, I don&#39;=
t have a problem =E2=80=94 it is with in the charter.=C2=A0 Let&#39;s just =
not forget about the
 other work we have=E2=80=A6=C2=A0</div>
<div><br>
</div>
<div>The second part of the point I tried to make was, I think, more import=
ant: =C2=A0extensions to IPv6 are
<span style=3D"font-weight:bold">not</span>=C2=A0within the manet WG&#39;s =
charter, but they belong to 6man.=C2=A0 It would probably be more effective=
 if the source routing work was in the Standards Track.=C2=A0 I&#39;m assum=
ing that Multi-path is just one use case for source routing,
 but there are probably more.=C2=A0 I also wrote: &quot;[*] I doubt that 6m=
an will want to put in an extension (even if it&#39;s already defied in RFC=
6554) for an Experimental effort.=C2=A0 I of course may be wrong and the Ex=
perimental nature may make it easier in their eyes
 to simply reference RFC6554.&quot;</div>
<div><br>
</div>
<div>Note that what I&#39;m suggesting is not to put the Multi-path work in=
 the Standards Track (that is a separate discussion) =E2=80=94 but to justi=
fy
<span style=3D"font-weight:bold">source routing for MANET networks</span>=
=C2=A0as a larger need (including multi-path, but bigger than that).</div>
<div><br>
</div>
<div>Thanks!</div><span class=3D"HOEnZb"><font color=3D"#888888">
<div><br>
</div>
<div>Alvaro.</div>
</font></span></div>

</blockquote></div><br></div>

--001a114a69b2d743d9053686e767--


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Jiazi YI <ietf@jiaziyi.com>
Thread-Topic: [manet] draft-ietf-olsrv2-multipath-09
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Looks good, Jiazi.

I wonder if in the future we can create deeper bounds between an OLSR core =
and a RPL edge, make that a combined domain where SRH can be used end to en=
d.

Maybe on occasion we can chat about the way RPL handles instances, which ar=
e like L3 VLANs.

Take care,

Pascal

Le 1 juil. 2016 ? 01:05, Jiazi YI <ietf@jiaziyi.com<mailto:ietf@jiaziyi.com=
>> a ?crit :

Hi,

Regarding the use of source routing header in IPv6 and the reference to RFC=
6554, we have contacted the 6man chairs.

The answer from Ole (one of the chairs) was that he didn't see why it can't=
 be used, and suggested the experimental code points of the IPv6 Routing Ty=
pes.

So in the next revision of the olsrv2-multipath, we will:

       - Use the experimental code point of IPv6 Routing Types for SRH.

       - Have a well scoped reference to RFC6554: for example, for SRH form=
at, use section 3, for SRH processing, use section 4, etc. Other than that,=
 the olsrv2-multipath would be self-contained.

       - Have a well defined scope of the use of the SRH: only the OLSRv2/M=
P-OLSRv2 routing domain.

Any other comments on the approach?

best

Jiazi

On Fri, Jun 24, 2016 at 1:40 PM, Alvaro Retana (aretana) <aretana@cisco.com=
<mailto:aretana@cisco.com>> wrote:
On 6/24/16, 5:16 AM, "yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on beha=
lf of Jiazi YI" <yi.jiazi@gmail.com<mailto:yi.jiazi@gmail.com> on behalf of=
 ietf@jiaziyi.com<mailto:ietf@jiaziyi.com>> wrote:

Hi!

Of course, As a WG, the priority is achieving the milestones, but I don't t=
hink it would preclude having extensions to OLSRv2, which is part of the ch=
arter also. In fact, IIRC, during the recharter discussion, several extensi=
ons for OLSRv2 were proposed. The WG finished with using the term "The MANE=
T WG is responsible for the maintenance of OLSRv2 [RFC 7181],
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],
and their extensions.", instead of listing possible extensions explicitly.

As I said: "To be clear: I'm not asking you not to do this work, I want the=
 WG Chairs to prioritize appropriately..."  That's it!  If the WG wants to =
take this work on, I don't have a problem - it is with in the charter.  Let=
's just not forget about the other work we have...

The second part of the point I tried to make was, I think, more important: =
 extensions to IPv6 are not within the manet WG's charter, but they belong =
to 6man.  It would probably be more effective if the source routing work wa=
s in the Standards Track.  I'm assuming that Multi-path is just one use cas=
e for source routing, but there are probably more.  I also wrote: "[*] I do=
ubt that 6man will want to put in an extension (even if it's already defied=
 in RFC6554) for an Experimental effort.  I of course may be wrong and the =
Experimental nature may make it easier in their eyes to simply reference RF=
C6554."

Note that what I'm suggesting is not to put the Multi-path work in the Stan=
dards Track (that is a separate discussion) - but to justify source routing=
 for MANET networks as a larger need (including multi-path, but bigger than=
 that).

Thanks!

Alvaro.

_______________________________________________
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body dir=3D"auto">
<div>Looks good, Jiazi.</div>
<div id=3D"AppleMailSignature"><br>
</div>
<div id=3D"AppleMailSignature">I wonder if in the future we can create deep=
er bounds between an OLSR core and a RPL edge, make that a combined domain =
where SRH can be used end to end.<br>
<br>
Maybe on occasion we can chat about the way RPL handles instances, which ar=
e like L3 VLANs.<br>
<br>
Take care,<br>
<div><br>
</div>
<div>Pascal</div>
</div>
<div><br>
Le 1 juil. 2016 &agrave; 01:05, Jiazi YI &lt;<a href=3D"mailto:ietf@jiaziyi=
.com">ietf@jiaziyi.com</a>&gt; a &eacute;crit&nbsp;:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>
<div dir=3D"ltr">Hi,&nbsp;
<div><br>
</div>
<div>Regarding the use of source routing header in IPv6 and the reference t=
o RFC6554, we have contacted the 6man chairs.&nbsp;</div>
<div><br>
</div>
<div>The answer from Ole (one of the chairs) was that he didn't see why it =
can't be used, and suggested the experimental code points of the IPv6 Routi=
ng Types.&nbsp;</div>
<div><br>
</div>
<div>So in the next revision of the olsrv2-multipath, we will:</div>
<div><br>
</div>
<div>&nbsp; &nbsp; &nbsp; &nbsp;- Use the experimental code point of IPv6 R=
outing Types for SRH.&nbsp;</div>
<div><br>
</div>
<div>&nbsp; &nbsp; &nbsp; &nbsp;-&nbsp;<span style=3D"color:rgb(0,0,0);font=
-family:Helvetica;font-size:12px">Have a well scoped reference to RFC6554: =
for example, for SRH format, use section 3, for SRH processing, use section=
 4, etc. Other than that, the olsrv2-multipath would be self-contained.&nbs=
p;</span></div>
<div><span style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px">=
<br>
</span></div>
<div><span style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px">=
&nbsp; &nbsp; &nbsp; &nbsp;-&nbsp;</span><font color=3D"#000000" face=3D"He=
lvetica"><span style=3D"font-size:12px">Have a well defined scope of the us=
e of the SRH: only the OLSRv2/MP-OLSRv2 routing domain.</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px"><br>
</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px">Any other comments on the approach?</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px"><br>
</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px">best</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px"><br>
</span></font></div>
<div><font color=3D"#000000" face=3D"Helvetica"><span style=3D"font-size:12=
px">Jiazi</span></font></div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Fri, Jun 24, 2016 at 1:40 PM, Alvaro Retana (=
aretana)
<span dir=3D"ltr">&lt;<a href=3D"mailto:aretana@cisco.com" target=3D"_blank=
">aretana@cisco.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>On 6/24/16, 5:16 AM, &quot;<a href=3D"mailto:yi.jiazi@gmail.com" targe=
t=3D"_blank">yi.jiazi@gmail.com</a> on behalf of Jiazi YI&quot; &lt;<a href=
=3D"mailto:yi.jiazi@gmail.com" target=3D"_blank">yi.jiazi@gmail.com</a> on =
behalf of
<a href=3D"mailto:ietf@jiaziyi.com" target=3D"_blank">ietf@jiaziyi.com</a>&=
gt; wrote:</div>
<div><br>
</div>
<div>Hi!</div>
<span class=3D""><span>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
Of course, As a WG, the priority is achieving the milestones, but I don't t=
hink it would preclude having extensions to OLSRv2, which is part of the ch=
arter also. In fact, IIRC, during the recharter discussion, several extensi=
ons for OLSRv2 were proposed. The
 WG finished with using the term &quot;The MANET WG is responsible for the<=
span>&nbsp;</span><b>maintenance</b><span>&nbsp;</span>of OLSRv2 [RFC 7181]=
,</div>
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
NHDP [RFC 6130] and the Generalized MANET Packet/Message Format [RFC5444],&=
nbsp;</div>
<div style=3D"color:rgb(0,0,0);font-family:-webkit-standard;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
and their<span>&nbsp;</span><b>extensions</b>.&quot;, instead of listing po=
ssible extensions explicitly.&nbsp;</div>
</blockquote>
</span>
<div><br>
</div>
</span>
<div>As I said: &quot;To be clear: I'm not asking you not to do this work, =
I want the WG Chairs to prioritize appropriately&#8230;&quot; &nbsp;That's =
it!&nbsp; If the WG wants to take this work on, I don't have a problem &#82=
12; it is with in the charter.&nbsp; Let's just not forget about the
 other work we have&#8230;&nbsp;</div>
<div><br>
</div>
<div>The second part of the point I tried to make was, I think, more import=
ant: &nbsp;extensions to IPv6 are
<span style=3D"font-weight:bold">not</span>&nbsp;within the manet WG's char=
ter, but they belong to 6man.&nbsp; It would probably be more effective if =
the source routing work was in the Standards Track.&nbsp; I'm assuming that=
 Multi-path is just one use case for source routing,
 but there are probably more.&nbsp; I also wrote: &quot;[*] I doubt that 6m=
an will want to put in an extension (even if it's already defied in RFC6554=
) for an Experimental effort.&nbsp; I of course may be wrong and the Experi=
mental nature may make it easier in their eyes
 to simply reference RFC6554.&quot;</div>
<div><br>
</div>
<div>Note that what I'm suggesting is not to put the Multi-path work in the=
 Standards Track (that is a separate discussion) &#8212; but to justify
<span style=3D"font-weight:bold">source routing for MANET networks</span>&n=
bsp;as a larger need (including multi-path, but bigger than that).</div>
<div><br>
</div>
<div>Thanks!</div>
<span class=3D"HOEnZb"><font color=3D"#888888">
<div><br>
</div>
<div>Alvaro.</div>
</font></span></div>
</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
<blockquote type=3D"cite">
<div><span>_______________________________________________</span><br>
<span>manet mailing list</span><br>
<span><a href=3D"mailto:manet@ietf.org">manet@ietf.org</a></span><br>
<span><a href=3D"https://www.ietf.org/mailman/listinfo/manet">https://www.i=
etf.org/mailman/listinfo/manet</a></span><br>
</div>
</blockquote>
</body>
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From: Henning Rogge <hrogge@gmail.com>
Date: Fri, 1 Jul 2016 07:40:33 +0200
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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
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Subject: Re: [manet] draft-ietf-olsrv2-multipath-09
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On Fri, Jul 1, 2016 at 7:32 AM, Pascal Thubert (pthubert)
<pthubert@cisco.com> wrote:
> Maybe on occasion we can chat about the way RPL handles instances, which are
> like L3 VLANs.

Wouldn't the multi-topology extension of OLSRv2 having a similar
effect? Multiple (partly) overlapping routing topologies with the same
routing agent.

Henning Rogge

