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Message-ID: <CAP+sJUdPsh_DWdzuJK0GFEQhJO3rapK9VryNsV4uavyksDonnQ@mail.gmail.com>
Subject: LLN Plugfest at IETF 90
From: Ines  Robles <mariainesrobles@googlemail.com>
To: ietf <ietf@ietf.org>
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--047d7b3a9b742ce9d904facd703b
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Dear all,

We would like to announce the plugfest event at the 90th IETF Meeting in
Toronto.

We call for participants. The deadline to receive topics to present or
demonstrate in the event is 06/13/2014. Interested audience is also welcome
and we encourage audience to participate in the feedback session.

Please find next the plugfest information.

We hope to see you there!

Xavier and Ines.

-----------------------
Low Power and Lossy Networks plugfest at IETF90

The IETF 6TiSCH <https://datatracker.ietf.org/wg/6tisch/charter/>, IETF 6lo
<https://datatracker.ietf.org/wg/6lo/charter/> and IETF ROLL
<https://datatracker.ietf.org/wg/roll/charter/> working groups are hosting
an informal "plugfest" event at the IETF90 meeting, in Toronto, CA, during
the week of July 20-25 2014.
Goals

The goal of this event is to bring together people interested in hands-on
experience around the technology developed by the 6TiSCH, 6lo and ROLL
working groups, with a particular focus on the TSCH mode of IEEE802.15.4e,
6lowpan, RPL and new WG specifications.
When and where ?

   - *Date*: Sunday July 20 2014, 0900-1300 EDT.
   - *Location*: Meeting Room TBD, Fairmont Royal York Hotel 100 Front
   Street W, Toronto, CA.

*Early access: TBD if the plugfest room will be open starting 8am EDT on
Sunday 20 2014 to allow people to set up.*
Topology proposed - TBD

   - Star topology
   - IPv6

Complementary angles

This event will feature the following complementary angles:

   - Interoperation
   - Demonstration
   - Tools

Focus 1: Interoperation

Download the interoperation guidelines:

   - - TBD for Toronto - interoperation guidelines, version 1 (London)
   <https://bitbucket.org/6tisch/meetings/src/master/140306_ietf89_plugfest_london/ietf89_6tisch_interop_guidelines_v01.pdf>

The goal is to achieve interoperation between different hardware and
software implementations on the different aspects addressed by 6lo, 6TiSCH
and ROLL WGs. This include 6TiSCH minimal draft implementation,
demonstrating TSCH synchronization and OF0 for RPL on a minimal network.
6lowpan to demostrate cross link layer inter-operability by means of
bridges or backbones routers. Storing and non-storing RPL implementation
including its coexistance in different sub-networks.

The focus during this event is open to demonstrating 6lo, ROLL or 6TiSCH
drafts implementations, including but not limited to: e.g. - 6TiSCH minimal
draft: http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00. - TBD

Participants are encouraged to bring devices which implement parts or all
of the listed drafts.

Levels of interoperation are proposed:

   - *Level 1*, star topology. A single BBR devices acts as the time source
   neighbor for all other nodes. Nodes need to demonstrate frame-based and
   acknowledgement-based synchronization. The static TSCH schedule, as well as
   all slot timings are taken from draft-ietf-6tisch-minimal-00.
   - *Level 2*, multi-hop topology. This level builds upon level 1. The
   goal of this level is full compliance to draft-ietf-6tisch-minimal-00,
   including multi-hop routing (RPL).
   - *Level 3*, on-the-fly scheduling. [optional] Preliminary
   implementations of
   http://tools.ietf.org/html/draft-dujovne-6tisch-on-the-fly can be shown.
   - *Level 4*, drafts from ROLL, such as:
   draft-ietf-roll-mpl-parameter-configuration,
   draft-ko-roll-mix-network-pathology, Opportunistic routing, selective DIS,
   and others that participants want to show
   - *Level 5*, drafts from 6lo, such as: draft-ietf-6lo-btle,
   draft-ietf-6lo-ghc,draft-ietf-6lo-lowpanz, and others that participants
   want to show.
   - *Level 6* Other drafts, such as draft-thubert-6man-flow-label-for-rpl,
   etc.

Focus 2: Demonstration

Participants are encouraged to bring devices and technology based on
6TiSCH, 6lo and ROLL which they believe can be of interest for the other
participants. These devices may or may not participate in the
interoperation event. Demonstration of more complete systems are
encouraged, for example systems which show the interconnection of a 6TiSCH
based mesh to traditional networks.
Focus 3: Tools

Participants are encouraged to bring and present different tools developed
around 6TiSCH/6lo/ROLL networks. Possible tools include, but are not
limited to:

   - acquisition devices (i.e. "sniffers")
   - packet analysis tools (e.g. Wireshark)
   - simulation/emulation platforms

Important Dates

The preparation of this event will be held during a portion of the
bi-weekly 6TiSCH call (*To Be Decided how and when!!!*). In particular:

   - *06/02/2014* Announcement of the plugfest event to the WG/ML related
   with constrained devices, such as: 6tisch, 6lo, roll, core, lwig, dtls-iot,
   coman, ace, etc.
   - *06/06/2014* Adoption of the plugfest call by the WGs, and call for
   participants at each group.
   - *06/02/2014-06/13/2014* Participants have contacted the plugfest
   chairs (Xavier or Ines) with a tentative description of what they wish to
   participate in.
   - *06/20/2014* Synchronization point 1. Participants can share the state
   of advancement of the implementation and raise blocking points.
   - *07/11/2014* Synchronization point 2. Participants can share the state
   of advancement of the implementation and raise blocking points.
   - *07/20/2014*. Plugfest at IETF90.

Tentative Agenda from 9:00 to 13:00

   - *[09.00]* Welcome and Initial Instructions
   - *[09.05]* Participants Pitch (5 min per Participant)
   - *[09.45]* Participants Pitch Tools (5 min per Participant)
   - *[10.15]* Interoperation (Islands)
   - *[11.50]* Feedback and open discussion.
   - *[12.40]* Acknowledgements and Plugfest End

For More Information

   - *Contact*: Xavi Vilajosana xvilajosana@eecs.berkeley.edu - Ines Robles
   mariainesrobles@gmail.com

Note Well

This event is organized as part of the IETF90 standardization meeting. You
need to register to the IETF90 conference to be able to participate. Daily
passes are available. The IETF Note Well applies to this plugfest, see
http://www.ietf.org/about/note-well.html.
About

The IETF 6TiSCH working group standardizes mechanisms focusing on enabling
IPv6 over the TSCH mode of the IEEE802.15.4e standard. You can access the
charter at http://datatracker.ietf.org/wg/6tisch/charter/, which also
contains links to the mailing list and the Internet-Drafts published by the
group. 6TiSCH holds weekly phone calls on Friday 8am PST. Participation is
open, and is subject to the IETF Note Well.

The IETF 6lo working group focuses on the work that facilitates IPv6
connectivity over constrained node networks with the characteristics of:
limited power, memory and processing resources;. You can access the charter
at https://datatracker.ietf.org/wg/6lo/charter/, which also contains links
to the mailing list and the I-D published by the group.

The IETF ROLL working group is focused on routing issues for LLN (Low Power
and Lossy Networks), in IPv6 routing architectural framework for the
industrial, connected home, building and urban sensor networks application
scenarios. You can access the charter at
https://datatracker.ietf.org/wg/roll/charter/, which also contains links to
the mailing list and the I-D published by the group.

--047d7b3a9b742ce9d904facd703b
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<div dir=3D"ltr"><div><div><span style=3D"font-family:arial,helvetica,sans-=
serif;color:rgb(0,0,0)">Dear all,</span><br></div><font face=3D"arial, helv=
etica, sans-serif"><br style=3D"color:rgb(0,0,0)"><span style=3D"color:rgb(=
0,0,0)">We would like to announce the plugfest event at the 90th IETF Meeti=
ng in Toronto.</span></font><div>

<span style=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif=
"><br></font></span></div></div><div><span style=3D"color:rgb(0,0,0)"><font=
 face=3D"arial, helvetica, sans-serif">We call for participants. The deadli=
ne to receive topics to present or demonstrate in the event is 06/13/2014. =
Interested audience is also welcome and we encourage audience to participat=
e in the feedback session.</font></span></div>

<div><div><span style=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, =
sans-serif"><br></font></span></div><div><span style=3D"color:rgb(0,0,0)"><=
font face=3D"arial, helvetica, sans-serif">Please find next the plugfest in=
formation.=C2=A0</font></span><div>

<font face=3D"arial, helvetica, sans-serif"><br></font></div><div><span sty=
le=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif">We hope=
 to see you there!</font></span><div><font color=3D"#000000" face=3D"arial,=
 helvetica, sans-serif"><br>

</font></div><div><div style=3D"color:rgb(0,0,0)"><font face=3D"arial, helv=
etica, sans-serif">Xavier and Ines.</font></div></div></div></div><div styl=
e=3D"font-family:&#39;Times New Roman&#39;;font-size:13px;color:rgb(0,0,0)"=
>
<font size=3D"3"><br>
</font></div><div style=3D"font-family:&#39;Times New Roman&#39;;font-size:=
13px;color:rgb(0,0,0)"><font size=3D"3">-----------------------</font></div=
><div><h1 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-si=
ze:24px;margin:20px 0px 10px;padding:0px;font-weight:normal;line-height:1.2=
5">

Low Power and Lossy Networks plugfest at IETF90</h1><p style=3D"color:rgb(5=
1,51,51);font-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;pa=
dding:0px;word-wrap:break-word;line-height:20px">The=C2=A0<a href=3D"https:=
//datatracker.ietf.org/wg/6tisch/charter/" style=3D"color:rgb(59,115,175);t=
ext-decoration:none" target=3D"_blank">IETF 6TiSCH</a>,=C2=A0<a href=3D"htt=
ps://datatracker.ietf.org/wg/6lo/charter/" style=3D"color:rgb(59,115,175);t=
ext-decoration:none" target=3D"_blank">IETF 6lo</a>=C2=A0and=C2=A0<a href=
=3D"https://datatracker.ietf.org/wg/roll/charter/" style=3D"color:rgb(59,11=
5,175);text-decoration:none" target=3D"_blank">IETF ROLL</a>=C2=A0working g=
roups are hosting an informal &quot;plugfest&quot; event at the IETF90 meet=
ing, in Toronto, CA, during the week of July 20-25 2014.</p>

<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Goals=
</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">

The goal of this event is to bring together people interested in hands-on e=
xperience around the technology developed by the 6TiSCH, 6lo and ROLL worki=
ng groups, with a particular focus on the TSCH mode of IEEE802.15.4e, 6lowp=
an, RPL and new WG specifications.</p>

<h3 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:18p=
x;margin:20px 0px 0px;padding:0px;line-height:1.3888888888888888;font-weigh=
t:normal">When and where ?</h3><ul style=3D"color:rgb(51,51,51);font-family=
:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">

<li style=3D"word-wrap:break-word"><strong>Date</strong>: Sunday July 20 20=
14, 0900-1300 EDT.</li><li style=3D"word-wrap:break-word"><strong>Location<=
/strong>: Meeting Room TBD, Fairmont Royal York Hotel 100 Front Street W, T=
oronto, CA.</li>

</ul><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
"><strong>Early access: TBD if the plugfest room will be open starting 8am =
EDT on Sunday 20 2014 to allow people to set up.</strong></p>

<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Topol=
ogy proposed - TBD</h2><ul style=3D"color:rgb(51,51,51);font-family:Arial,s=
ans-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">

<li style=3D"word-wrap:break-word">Star topology</li><li style=3D"word-wrap=
:break-word">IPv6</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Ari=
al,sans-serif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:no=
rmal;line-height:1.5">

Complementary angles</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,=
sans-serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-w=
ord;line-height:20px">This event will feature the following complementary a=
ngles:</p>

<ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14p=
x;margin:10px 0px 0px;line-height:20px"><li style=3D"word-wrap:break-word">=
Interoperation</li><li style=3D"word-wrap:break-word">Demonstration</li><li=
 style=3D"word-wrap:break-word">

Tools</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-seri=
f;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-he=
ight:1.5">Focus 1: Interoperation</h2>
<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Dow=
nload the interoperation guidelines:</p><ul style=3D"color:rgb(51,51,51);fo=
nt-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:2=
0px">

<li style=3D"word-wrap:break-word"><a href=3D"https://bitbucket.org/6tisch/=
meetings/src/master/140306_ietf89_plugfest_london/ietf89_6tisch_interop_gui=
delines_v01.pdf" style=3D"color:rgb(59,115,175);text-decoration:none" targe=
t=3D"_blank"> - TBD for Toronto - interoperation guidelines, version 1 (Lon=
don)</a></li>

</ul><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">The goal is to achieve interoperation between different hardware and soft=
ware implementations on the different aspects addressed by 6lo, 6TiSCH and =
ROLL WGs. This include 6TiSCH minimal draft implementation, demonstrating T=
SCH synchronization and OF0 for RPL on a minimal network. 6lowpan to demost=
rate cross link layer inter-operability by means of bridges or backbones ro=
uters. Storing and non-storing RPL implementation including its coexistance=
 in different sub-networks.</p>

<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 focus during this event is open to demonstrating 6lo, ROLL or 6TiSCH draft=
s implementations, including but not limited to: e.g. - 6TiSCH minimal draf=
t:=C2=A0<a href=3D"http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00"=
 rel=3D"nofollow" style=3D"color:rgb(59,115,175);text-decoration:none" targ=
et=3D"_blank">http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00</a>. =
- TBD</p>

<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Par=
ticipants are encouraged to bring devices which implement parts or all of t=
he listed drafts.</p>

<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Lev=
els of interoperation are proposed:</p><ul style=3D"color:rgb(51,51,51);fon=
t-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:20=
px">

<li style=3D"word-wrap:break-word"><strong>Level 1</strong>, star topology.=
 A single BBR devices acts as the time source neighbor for all other nodes.=
 Nodes need to demonstrate frame-based and acknowledgement-based synchroniz=
ation. The static TSCH schedule, as well as all slot timings are taken from=
 draft-ietf-6tisch-minimal-00.</li>

<li style=3D"word-wrap:break-word"><strong>Level 2</strong>, multi-hop topo=
logy. This level builds upon level 1. The goal of this level is full compli=
ance to draft-ietf-6tisch-minimal-00, including multi-hop routing (RPL).</l=
i>

<li style=3D"word-wrap:break-word"><strong>Level 3</strong>, on-the-fly sch=
eduling. [optional] Preliminary implementations of=C2=A0<a href=3D"http://t=
ools.ietf.org/html/draft-dujovne-6tisch-on-the-fly" rel=3D"nofollow" style=
=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">http://to=
ols.ietf.org/html/draft-dujovne-6tisch-on-the-fly</a>=C2=A0can be shown.</l=
i>

<li style=3D"word-wrap:break-word"><strong>Level 4</strong>, drafts from RO=
LL, such as: draft-ietf-roll-mpl-parameter-configuration, draft-ko-roll-mix=
-network-pathology, Opportunistic routing, selective DIS, and others that p=
articipants want to show</li>

<li style=3D"word-wrap:break-word"><strong>Level 5</strong>, drafts from 6l=
o, such as: draft-ietf-6lo-btle, draft-ietf-6lo-ghc,draft-ietf-6lo-lowpanz,=
 and others that participants want to show.</li><li style=3D"word-wrap:brea=
k-word">

<strong>Level 6</strong>=C2=A0Other drafts, such as draft-thubert-6man-flow=
-label-for-rpl, etc.</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:=
Arial,sans-serif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight=
:normal;line-height:1.5">

Focus 2: Demonstration</h2><p style=3D"color:rgb(51,51,51);font-family:Aria=
l,sans-serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break=
-word;line-height:20px">Participants are encouraged to bring devices and te=
chnology based on 6TiSCH, 6lo and ROLL which they believe can be of interes=
t for the other participants. These devices may or may not participate in t=
he interoperation event. Demonstration of more complete systems are encoura=
ged, for example systems which show the interconnection of a 6TiSCH based m=
esh to traditional networks.</p>

<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Focus=
 3: Tools</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;=
font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-he=
ight:20px">

Participants are encouraged to bring and present different tools developed =
around 6TiSCH/6lo/ROLL networks. Possible tools include, but are not limite=
d to:</p><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font=
-size:14px;margin:10px 0px 0px;line-height:20px">

<li style=3D"word-wrap:break-word">acquisition devices (i.e. &quot;sniffers=
&quot;)</li><li style=3D"word-wrap:break-word">packet analysis tools (e.g. =
Wireshark)</li><li style=3D"word-wrap:break-word">simulation/emulation plat=
forms</li>

</ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-siz=
e:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">=
Important Dates</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-=
serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;l=
ine-height:20px">

The preparation of this event will be held during a portion of the bi-weekl=
y 6TiSCH call (<strong>To Be Decided how and when!!!</strong>). In particul=
ar:</p><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-s=
ize:14px;margin:10px 0px 0px;line-height:20px">

<li style=3D"word-wrap:break-word"><strong>06/02/2014</strong>=C2=A0Announc=
ement of the plugfest event to the WG/ML related with constrained devices, =
such as: 6tisch, 6lo, roll, core, lwig, dtls-iot, coman, ace, etc.</li><li =
style=3D"word-wrap:break-word">

<strong>06/06/2014</strong>=C2=A0Adoption of the plugfest call by the WGs, =
and call for participants at each group.</li><li style=3D"word-wrap:break-w=
ord"><strong>06/02/2014-06/13/2014</strong>=C2=A0Participants have contacte=
d the plugfest chairs (Xavier or Ines) with a tentative description of what=
 they wish to participate in.</li>

<li style=3D"word-wrap:break-word"><strong>06/20/2014</strong>=C2=A0Synchro=
nization point 1. Participants can share the state of advancement of the im=
plementation and raise blocking points.</li><li style=3D"word-wrap:break-wo=
rd">
<strong>07/11/2014</strong>=C2=A0Synchronization point 2. Participants can =
share the state of advancement of the implementation and raise blocking poi=
nts.</li>
<li style=3D"word-wrap:break-word"><strong>07/20/2014</strong>. Plugfest at=
 IETF90.</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-s=
erif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line=
-height:1.5">

Tentative Agenda from 9:00 to 13:00</h2><ul style=3D"color:rgb(51,51,51);fo=
nt-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:2=
0px"><li style=3D"word-wrap:break-word"><em>[09.00]</em>=C2=A0Welcome and I=
nitial Instructions</li>

<li style=3D"word-wrap:break-word"><em>[09.05]</em>=C2=A0Participants Pitch=
 (5 min per Participant)</li><li style=3D"word-wrap:break-word"><em>[09.45]=
</em>=C2=A0Participants Pitch Tools (5 min per Participant)</li><li style=
=3D"word-wrap:break-word">

<em>[10.15]</em>=C2=A0Interoperation (Islands)</li><li style=3D"word-wrap:b=
reak-word"><em>[11.50]</em>=C2=A0Feedback and open discussion.</li><li styl=
e=3D"word-wrap:break-word"><em>[12.40]</em>=C2=A0Acknowledgements and Plugf=
est End</li></ul>

<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">For M=
ore Information</h2><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans=
-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">

<li style=3D"word-wrap:break-word"><strong>Contact</strong>: Xavi Vilajosan=
a=C2=A0<a href=3D"mailto:xvilajosana@eecs.berkeley.edu" style=3D"color:rgb(=
59,115,175);text-decoration:none" target=3D"_blank">xvilajosana@eecs.berkel=
ey.edu</a>=C2=A0- Ines Robles=C2=A0<a href=3D"mailto:mariainesrobles@gmail.=
com" style=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank"=
>mariainesrobles@gmail.com</a></li>

</ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-siz=
e:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">=
Note Well</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;=
font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-he=
ight:20px">

This event is organized as part of the IETF90 standardization meeting. You =
need to register to the IETF90 conference to be able to participate. Daily =
passes are available. The IETF Note Well applies to this plugfest, see=C2=
=A0<a href=3D"http://www.ietf.org/about/note-well.html" rel=3D"nofollow" st=
yle=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">http:/=
/www.ietf.org/about/note-well.html</a>.</p>

<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">About=
</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">

The IETF 6TiSCH working group standardizes mechanisms focusing on enabling =
IPv6 over the TSCH mode of the IEEE802.15.4e standard. You can access the c=
harter at=C2=A0<a href=3D"http://datatracker.ietf.org/wg/6tisch/charter/" r=
el=3D"nofollow" style=3D"color:rgb(59,115,175);text-decoration:none" target=
=3D"_blank">http://datatracker.ietf.org/wg/6tisch/charter/</a>, which also =
contains links to the mailing list and the Internet-Drafts published by the=
 group. 6TiSCH holds weekly phone calls on Friday 8am PST. Participation is=
 open, and is subject to the IETF Note Well.</p>

<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 IETF 6lo working group focuses on the work that facilitates IPv6 connectiv=
ity over constrained node networks with the characteristics of: limited pow=
er, memory and processing resources;. You can access the charter at=C2=A0<a=
 href=3D"https://datatracker.ietf.org/wg/6lo/charter/" rel=3D"nofollow" sty=
le=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">https:/=
/datatracker.ietf.org/wg/6lo/charter/</a>, which also contains links to the=
 mailing list and the I-D published by the group.</p>

<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 IETF ROLL working group is focused on routing issues for LLN (Low Power an=
d Lossy Networks), in IPv6 routing architectural framework for the industri=
al, connected home, building and urban sensor networks application scenario=
s. You can access the charter at=C2=A0<a href=3D"https://datatracker.ietf.o=
rg/wg/roll/charter/" rel=3D"nofollow" style=3D"color:rgb(59,115,175);text-d=
ecoration:none" target=3D"_blank">https://datatracker.ietf.org/wg/roll/char=
ter/</a>, which also contains links to the mailing list and the I-D publish=
ed by the group.</p>

</div></div></div>

--047d7b3a9b742ce9d904facd703b--


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From: "Panos Kampanakis (pkampana)" <pkampana@cisco.com>
To: "6man@ietf.org" <6man@ietf.org>
Subject: RE: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
Thread-Topic: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
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Subject: 6MAN WGLC: draft-ietf-6man-enhanced-dad
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All,

This message starts a two week 6MAN Working Group Last Call on =
draft-ietf-6man-enhanced-dad

	Title           : Enhanced Duplicate Address Detection
	Author(s)   : R. Asati, H. Singh, W. Beebee, E. Dart, W. George, =
C. Pignataro
	Filename   : draft-ietf-6man-enhanced-dad-05
	Pages        : 11
	Date           : 2014-05-02
    http://tools.ietf.org/html/draft-ietf-6man-enhanced-dad

as a Proposed Standards document. Substantive comments and statements of =
support for advancing this document should be directed to the mailing =
list. Editorial suggestions can be sent to the authors.  This last call =
will end on June 17, 2014.

We need volunteers to do a detailed review of the document. We would =
also encourage volunteers to act as document shepherds. Please contact =
the chairs directly.

Regards,

Bob Hinden & Ole Tr=F8an

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From nobody Tue Jun  3 09:30:20 2014
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Subject: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Behcet Sarikaya <sarikaya2012@gmail.com>
To: =?UTF-8?Q?Dan_L=C3=BCdtke?= <maildanrl@gmail.com>,  Brian E Carpenter <brian.e.carpenter@gmail.com>, Ray Hunter <v6ops@globis.net>, "6man@ietf.org" <6man@ietf.org>
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Hi Dan, Brian, Ray, all,

I revised the draft and the revision can be found below.
Please let me know if there are any issues.

Regards,

Behcet

A new version of I-D, draft-sarikaya-6man-next-hop-ra-02.txt
has been successfully submitted by Behcet Sarikaya and posted to the
IETF repository.

Name:           draft-sarikaya-6man-next-hop-ra
Revision:       02
Title:          IPv6 RA Options for Next Hop Routes
Document date:  2014-06-03
Group:          Individual Submission
Pages:          13
URL:
http://www.ietf.org/internet-drafts/draft-sarikaya-6man-next-hop-ra-02.txt
Status:
https://datatracker.ietf.org/doc/draft-sarikaya-6man-next-hop-ra/
Htmlized:       http://tools.ietf.org/html/draft-sarikaya-6man-next-hop-ra-02
Diff:
http://www.ietf.org/rfcdiff?url2=draft-sarikaya-6man-next-hop-ra-02

Abstract:
   This document proposes new Router Advertisement options for
   configuring next hop routes on the mobile or fixed nodes.  Using
   these options, an operator can easily configure nodes with multiple
   interfaces (or otherwise multi-homed) to enable them to select the
   routes to a destination.  Each option is defined together with
   definitions of host and router behaviors.  This document also
   proposes the router advertisement extensions for source address
   dependent routing.




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

The IETF Secretariat


From nobody Tue Jun  3 14:37:15 2014
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Subject: I-D Action: draft-ietf-6man-multicast-scopes-06.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 IPv6 Maintenance Working Group of the IETF.

        Title           : IPv6 Multicast Address Scopes
        Author          : Ralph Droms
	Filename        : draft-ietf-6man-multicast-scopes-06.txt
	Pages           : 6
	Date            : 2014-06-03

Abstract:
   This document updates the definitions of IPv6 multicast scopes.  This
   document updates RFC 4007 and RFC 4291


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-multicast-scopes/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-6man-multicast-scopes-06

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-6man-multicast-scopes-06


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ftp://ftp.ietf.org/internet-drafts/


From nobody Thu Jun  5 03:53:14 2014
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To: marshall.eubanks@gmail.com, Philip.Chimento@jhuapl.edu, magnus.westerlund@ericsson.com, brian@innovationslab.net, ted.lemon@nominum.com, bob.hinden@gmail.com, otroan@employees.org
Subject: [Editorial Errata Reported] RFC6935 (4006)
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The following errata report has been submitted for RFC6935,
"IPv6 and UDP Checksums for Tunneled Packets".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6935&eid=4006

--------------------------------------
Type: Editorial
Reported by: Andreas Cudok <andreas.cudok@datev.de>

Section: 5

Original Text
-------------
Middleboxes supporting IPv6 MUST follow requirements 9, 10, and 11
of the usage requirements specified in Section 5 of "Applicability
Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
[RFC6936].

Corrected Text
--------------
Middleboxes supporting IPv6 MUST follow requirements 8, 9, and 10
of the usage requirements specified in Section 5 of "Applicability
Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
[RFC6936].

Notes
-----


Instructions:
-------------
This errata is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party (IESG)
can log in to change the status and edit the report, if necessary. 

--------------------------------------
RFC6935 (draft-ietf-6man-udpchecksums-08)
--------------------------------------
Title               : IPv6 and UDP Checksums for Tunneled Packets
Publication Date    : April 2013
Author(s)           : M. Eubanks, P. Chimento, M. Westerlund
Category            : PROPOSED STANDARD
Source              : IPv6 Maintenance
Area                : Internet
Stream              : IETF
Verifying Party     : IESG


From nobody Thu Jun  5 04:06:35 2014
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Subject: Re: [Editorial Errata Reported] RFC6935 (4006)
From: Ole Troan <otroan@employees.org>
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I believe this errata should be verified.

cheers,
Ole



On 05 Jun 2014, at 12:52 , RFC Errata System <rfc-editor@rfc-editor.org> =
wrote:

> The following errata report has been submitted for RFC6935,
> "IPv6 and UDP Checksums for Tunneled Packets".
>=20
> --------------------------------------
> You may review the report below and at:
> http://www.rfc-editor.org/errata_search.php?rfc=3D6935&eid=3D4006
>=20
> --------------------------------------
> Type: Editorial
> Reported by: Andreas Cudok <andreas.cudok@datev.de>
>=20
> Section: 5
>=20
> Original Text
> -------------
> Middleboxes supporting IPv6 MUST follow requirements 9, 10, and 11
> of the usage requirements specified in Section 5 of "Applicability
> Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
> [RFC6936].
>=20
> Corrected Text
> --------------
> Middleboxes supporting IPv6 MUST follow requirements 8, 9, and 10
> of the usage requirements specified in Section 5 of "Applicability
> Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
> [RFC6936].
>=20
> Notes
> -----
>=20
>=20
> Instructions:
> -------------
> This errata is currently posted as "Reported". If necessary, please
> use "Reply All" to discuss whether it should be verified or
> rejected. When a decision is reached, the verifying party (IESG)
> can log in to change the status and edit the report, if necessary.=20
>=20
> --------------------------------------
> RFC6935 (draft-ietf-6man-udpchecksums-08)
> --------------------------------------
> Title               : IPv6 and UDP Checksums for Tunneled Packets
> Publication Date    : April 2013
> Author(s)           : M. Eubanks, P. Chimento, M. Westerlund
> Category            : PROPOSED STANDARD
> Source              : IPv6 Maintenance
> Area                : Internet
> Stream              : IETF
> Verifying Party     : IESG


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The following errata report has been verified for RFC6935,
"IPv6 and UDP Checksums for Tunneled Packets". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=6935&eid=4006

--------------------------------------
Status: Verified
Type: Editorial

Reported by: Andreas Cudok <andreas.cudok@datev.de>
Date Reported: 2014-06-05
Verified by: Brian Haberman (IESG)

Section: 5

Original Text
-------------
Middleboxes supporting IPv6 MUST follow requirements 9, 10, and 11
of the usage requirements specified in Section 5 of "Applicability
Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
[RFC6936].

Corrected Text
--------------
Middleboxes supporting IPv6 MUST follow requirements 8, 9, and 10
of the usage requirements specified in Section 5 of "Applicability
Statement for the Use of IPv6 UDP Datagrams with Zero Checksums"
[RFC6936].

Notes
-----


--------------------------------------
RFC6935 (draft-ietf-6man-udpchecksums-08)
--------------------------------------
Title               : IPv6 and UDP Checksums for Tunneled Packets
Publication Date    : April 2013
Author(s)           : M. Eubanks, P. Chimento, M. Westerlund
Category            : PROPOSED STANDARD
Source              : IPv6 Maintenance
Area                : Internet
Stream              : IETF
Verifying Party     : IESG


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Date: Sun, 08 Jun 2014 17:04:06 +1200
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Panos,

I think this draft fills a gap. In fact I wonder whether it shouldn't
be a BCP, so that it gets anough attention.

I do have a few comments, and I hope that some real implementors
can have a look too.

> 1.  Introduction
...
>    [RFC2460]
>    describes some IPv6 EH recommendations of the order and allowed
>    occurrences of headers, but it does not provide other guidance on how
>    EHs should be parsed. 

I apologise for plugging my own RFC, but I think it's important to insert
something like this:

 [RFC7045] updates RFC 2460 by specifying the required behavior of
 middleboxes when handing an EH chain, but it does not go into detail
 about the parsing process.

(The reason is that we really need all those middlebox implementors to
look at the IETF's latest thinking on this. There is a lot of code
out there based on careless reading of RFC 2460.)

>  Guideline 2: From Section 5 of [RFC7112], when parsing an EH chain,

That reads as if you are quoting RFC 7112, but you are not. Is this
what you mean?:

 Guideline 2: As a consequence of Section 5 of [RFC7112], when parsing an EH chain,

Then you have this phrase twice:

> field is not an Upper Layer (UL) protocol (i.e.  TCP) 

I hope you mean "(e.g. TCP)" because this would apply to any
protocol, not just TCP.

Also, you could add a note that the current list of defined EH values
is maintained by IANA in the "IPv6 Extension Header Types" registry
created by RFC 7045. This registry is intended precisely as a
convenient reference for implementors.

> Guideline 3: Thus, when parsing an EH chain,
...
> o  an intermediate device that enforces policies (ACLs, stateful
>    inspection and firewalling) by matching on IPv6 EHs MUST discard
>    packets that have an HbH EH that is not first in the chain
>    (Section 2.2 of [RFC7045]).  If the device is not parsing the EH
>    chain, it MAY NOT discard the packets.

I've already mentioned in private mail that this needs to be MUST NOT.
However, a picky implementor will want to know how a device that is
not parsing the header chain will even know that there is a HbH EH
that is not first.

> 4.  Parsing malformed EHs
...
>    If the data of the last EH or the UL
>    Header plus its data does not align with the original IPv6 Header
>    Payload Length the packet MUST be dropped unless another policy step
>    already discarded it.

I think this is inconsistent with a statement in RFC 2460:

> 4.7 No Next Header
> 
>    The value 59 in the Next Header field of an IPv6 header or any
>    extension header indicates that there is nothing following that
>    header.  If the Payload Length field of the IPv6 header indicates the
>    presence of octets past the end of a header whose Next Header field
>    contains 59, those octets must be ignored, and passed on unchanged if
>    the packet is forwarded.

Unless I have misunderstood something, your guideline 5 needs
an exception for the No Next Header case.

(Or we could decide that the case described in RFC 2460 is an
invitation to buffer overflow attacks, and change the rule.)

Regards
   Brian

On 03/06/2014 05:36, Panos Kampanakis (pkampana) wrote:
> Hello,
> 
> I just submitted an Informational draft that provides guidelines for IPv6 implementers on how to parse IPv6 extension headers.
> 
> There are multiple RFCs like RFC2460, RFC7112, RFC7045, RFC5722 and RFC6946 already that provide some rules on IPv6 packet processing. These address separate issues and is tough for an implementer to track all rules in each RFC. Additionally, there are some gaps in parsing malformed EHs and how EH chains should be parsed. To my knowledge, there is no document that and implementer could use as a single source of truth that would tell him how IPv6 EH should be parsed. That has led to different implementations that are inconsistent. For example malformed packets are in some cases processed and others dropped based on vendor implementation.
> 
> As more and more smart devices are starting to participate in the network, there is a need for a document that will ensure there is consistency on how IPv6 EHs are processed to prevent inconsistencies and potential security implications from incorrectly parsing headers. This document is trying to address that need.
> 
> Name:		draft-kampanakis-6man-ipv6-eh-parsing
> Revision:	00
> Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> Document date:	2014-06-02
> Group:		Individual Submission
> Pages:		8
> URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6man-ipv6-eh-parsing-00.txt 
> Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-ipv6-eh-parsing 
> Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-eh-parsing-00 
> 
> 
> Thoughts on the doc being adopted as WG item and other feedback is welcome.
> 
> Panos
> Cisco Systems
> 
> 
> 
> 
> -----Original Message-----
> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
> Sent: Monday, June 02, 2014 1:08 PM
> To: Panos Kampanakis (pkampana); Panos Kampanakis (pkampana)
> Subject: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> 
> 
> A new version of I-D, draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> has been successfully submitted by Panos Kampanakis and posted to the IETF repository.
> 
> Name:		draft-kampanakis-6man-ipv6-eh-parsing
> Revision:	00
> Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> Document date:	2014-06-02
> Group:		Individual Submission
> Pages:		8
> URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-ipv6-eh-parsing/
> Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-eh-parsing-00
> 
> 
> Abstract:
>    IPv6 is widely used on the internet today and is expected to be
>    deployed more as more devices (i.e. home automation) get inter-
>    connected.  The IPv6 header format allows for the use of Extension
>    Headers (EH).  EHs could be chained together with very few existing
>    guidelines by the IPv6 protocol on how devices should parse them,
>    which open room for security concerns and inconsistencies.  This
>    document presents guidelines for parsing IPv6 EHs with a goal of
>    providing a common and consistent parsing methodology for IPv6
>    implementers among the industry.
> 
>                                                                                   
> 
> 
> Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.
> 
> The IETF Secretariat
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
> 


From nobody Sun Jun  8 20:32:20 2014
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Date: Mon, 09 Jun 2014 15:32:14 +1200
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Hi,

I believe we have a problem to which this is one of the two solutions.
(More on that later.)

I only have two technical queries about this version, both on the same
sentence:

>    Next Hop Address with
>    Route Prefix option MUST be followed by a Source Prefix option
>    defined in Section 10 to indicate that any source addresses derived
>    from the source prefix will not be subject to ingress filtering on
>    these routes supported by these next hops.

1. Does this mean "MUST be immediately followed"? I think this
is necessary.

2. What if a given Next Hop Address with Route Prefix allows
packets with several different source prefixes? Must the
couple {Next Hop Address with Route Prefix, Source Prefix}
be repeated several times, or can we somehow use
{Next Hop Address with Route Prefix, Source Prefix 1, Source Prefix 2...} ?

Now about the two solutions. Some people want to achieve this with
RA. Some people want to achieve it with DHCPv6. We can continue that
argument for ever, or we can choose sanity and do both. That's why I
rather liked draft-arifumi-ipv6-nd-source-address-select and
draft-hirotaka-dhc-source-address-selection-opt 9 years ago. They
attempted to use strictly identical formats for RA and DHCPv6
messages for this purpose.

Incidentally, there is work to be done on how host stacks
and the socket API handle all this. Just define RA and DHCPv6
messages is only the start.

Regards
   Brian Carpenter

On 04/06/2014 04:26, internet-drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
> 
>         Title           : IPv6 RA Options for Next Hop Routes
>         Author          : Behcet Sarikaya
> 	Filename        : draft-sarikaya-6man-next-hop-ra-02.txt
> 	Pages           : 13
> 	Date            : 2014-06-03
> 
> Abstract:
>    This document proposes new Router Advertisement options for
>    configuring next hop routes on the mobile or fixed nodes.  Using
>    these options, an operator can easily configure nodes with multiple
>    interfaces (or otherwise multi-homed) to enable them to select the
>    routes to a destination.  Each option is defined together with
>    definitions of host and router behaviors.  This document also
>    proposes the router advertisement extensions for source address
>    dependent routing.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-sarikaya-6man-next-hop-ra/
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-sarikaya-6man-next-hop-ra-02
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-sarikaya-6man-next-hop-ra-02
> 
> 
> 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/
> 
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> 


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Mon, 9 Jun 2014 13:19:20 +0900
Message-ID: <CAKD1Yr0qdk9w80pRf=g3bs3JaO7_v-fQiOmQ9WriWWrDmNATeg@mail.gmail.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
To: Behcet Sarikaya <sarikaya@ieee.org>
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--089e015383f017391104fb5f856c
Content-Type: text/plain; charset=UTF-8

On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya <sarikaya2012@gmail.com>
wrote:

> I revised the draft and the revision can be found below.
> Please let me know if there are any issues.
>

I have several concerns with this draft and do not support its adoption.

First: as defined, the next hop option completely removes the fate-sharing
properties of IPv6 route configuration. With this option, a router can now
specify a non-working next-hop, resulting in broken connectivity for the
hosts. I don't think we should do this. If the desire is to send traffic to
a router on a different interface, then that router should be sending an
RFC 4191 announcement itself.

The stated reason for this is:

   we assume that next hop routers are not able to provide this
   information.  One solution would be to develop an inter-router
   protocol [...] However, such a solution has been singled out due to
   the complexities involved.

However, that is a flawed argument. Consider the case where router A on
link A specifies router B on link B as the router for a specified prefix.
Now router B goes down. Router A has no way of knowing this because it's a
different link. The host now has broken connectivity. In order for the host
not to have broken connectivity, there would have to be an "inter-router
protocol" so router A could know about router B going away, and withdraw
the announcement. So this option, which is proposed precisely to avoid an
inter-router protocol ends up needing an inter-router protocol in order to
work properly.

It's worth noting that we have this problem in IPv4 today - because DHCPv4
does not share fate with routers, many networks are forced to run
redundancy protocols between routers (e.g., VRRP). We should not need to do
this in IPv6.


Second: this breaks the convention that routers are identified by
link-local addresses: because the address options do not contain a scope,
there is no way to use a link-local address in the next hop option, as it
would be meaningless. Thus it must be assumed that the IP address in the
next hop option must have global scope. But using global-scope addresses
removes the ability we have today to do seamless renumbering of IPv6
addresses using multiple prefixes.


Third: the multiple-interface model is much more crude than that currently
being proposed in the MIF working group. This draft should look at that
architecture, particularly with regard to explicit provisioning domains and
trust levels.

Regards,
Lorenzo

--089e015383f017391104fb5f856c
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On W=
ed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya <span dir=3D"ltr">&lt;<a href=
=3D"mailto:sarikaya2012@gmail.com" target=3D"_blank">sarikaya2012@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 revised the draft and the revision can be found below.<b=
r>


Please let me know if there are any issues.<br></blockquote><div><br></div>=
<div>I have several concerns with this draft and do not support its adoptio=
n.</div><div><br></div><div>First: as defined, the next hop option complete=
ly removes the fate-sharing properties of IPv6 route configuration. With th=
is option, a router can now specify a non-working next-hop, resulting in br=
oken connectivity for the hosts. I don&#39;t think we should do this. If th=
e desire is to send traffic to a router on a different interface, then that=
 router should be sending an RFC 4191 announcement itself.</div>

<div><br></div><div>The stated reason for this is:</div><div><br></div><div=
><div>=C2=A0 =C2=A0we assume that next hop routers are not able to provide =
this</div><div>=C2=A0 =C2=A0information. =C2=A0One solution would be to dev=
elop an inter-router</div>

<div>=C2=A0 =C2=A0protocol [...] However, such a solution has been singled =
out due to</div><div>=C2=A0 =C2=A0the complexities involved.</div></div><di=
v><br></div><div>However, that is a flawed argument. Consider the case wher=
e router A on link A specifies router B on link B as the router for a speci=
fied prefix. Now router B goes down. Router A has no way of knowing this be=
cause it&#39;s a different link. The host now has broken connectivity. In o=
rder for the host not to have broken connectivity, there would have to be a=
n &quot;inter-router protocol&quot; so router A could know about router B g=
oing away, and withdraw the announcement. So this option, which is proposed=
 precisely to avoid an inter-router protocol ends up needing an inter-route=
r protocol in order to work properly.</div>

<div><br></div><div>It&#39;s worth noting that we have this problem in IPv4=
 today - because DHCPv4 does not share fate with routers, many networks are=
 forced to run redundancy protocols between routers (e.g., VRRP). We should=
 not need to do this in IPv6.</div>

<div><br></div><div><br></div><div>Second: this breaks the convention that =
routers are identified by link-local addresses: because the address options=
 do not contain a scope, there is no way to use a link-local address in the=
 next hop option, as it would be meaningless. Thus it must be assumed that =
the IP address in the next hop option must have global scope. But using glo=
bal-scope addresses removes the ability we have today to do seamless renumb=
ering of IPv6 addresses using multiple prefixes.</div>

<div><br></div><div><br></div><div>Third: the multiple-interface model is m=
uch more crude than that currently being proposed in the MIF working group.=
 This draft should look at that architecture, particularly with regard to e=
xplicit provisioning domains and trust levels.</div>

<div><br></div><div>Regards,</div><div>Lorenzo</div></div></div></div>

--089e015383f017391104fb5f856c--


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From: "Panos Kampanakis (pkampana)" <pkampana@cisco.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Subject: RE: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
Thread-Topic: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
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From nobody Mon Jun  9 16:04:19 2014
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Date: Tue, 10 Jun 2014 11:04:15 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Lorenzo Colitti <lorenzo@google.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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Hi Lorenzo,

On 09/06/2014 16:19, Lorenzo Colitti wrote:
> On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya <sarikaya2012@gmail.com>
> wrote:
> 
>> I revised the draft and the revision can be found below.
>> Please let me know if there are any issues.
>>
> 
> I have several concerns with this draft and do not support its adoption.
> 
> First: as defined, the next hop option completely removes the fate-sharing
> properties of IPv6 route configuration. 

I think that's an intrinsic problem with trying to make SADR work.
Only an intelligence that has some sort of overview can get this
right, i.e. assemble a complete and consistent set of SADR rules
that will always select the correct first hop to get a packet
into a part of the IGP system that will forward it towards the
correct site egress.

I remain to be convinced that this can actually be done by
distributed intelligence; but in any case, I think we are bound
to lose fate-sharing, regardless of whether the SADR rules
come via RAs, DHCPv6, or some other mechanism.

So I'd put it another way: until we have a general model for
how the SADR rules will be computed and distributed, defining
specifics of RA or DHCPv6 messages is maybe premature.

<snip>

> ... So this option, which is proposed precisely to avoid an
> inter-router protocol ends up needing an inter-router protocol in order to
> work properly.
> 
> It's worth noting that we have this problem in IPv4 today - because DHCPv4
> does not share fate with routers, many networks are forced to run
> redundancy protocols between routers (e.g., VRRP). We should not need to do
> this in IPv6.

But where's the existence proof that we can avoid it?

> Second: this breaks the convention that routers are identified by
> link-local addresses: because the address options do not contain a scope,
> there is no way to use a link-local address in the next hop option, as it
> would be meaningless. Thus it must be assumed that the IP address in the
> next hop option must have global scope. But using global-scope addresses
> removes the ability we have today to do seamless renumbering of IPv6
> addresses using multiple prefixes.

I suppose we could argue that each router on a link could be aware of
all other routers on the same link, and therefore could know the
appropriate link-local address. Or we could argue that each router
should only send Next Hop RAs that pertain to itself. But again, that
points to the fact that we need a general model before we finalise specifics.

If this was the only issue for seamless renumbering, I'd be a
happy man.

> Third: the multiple-interface model is much more crude than that currently
> being proposed in the MIF working group. This draft should look at that
> architecture, particularly with regard to explicit provisioning domains and
> trust levels.

I agree, although how PVDs will be reduced to code is still a bit
of a mystery to me. Once again: what's the general model for SADR?

(For those in a mood for more brain punishment, see
http://tools.ietf.org/html/draft-shyam-site-multi . There are
many issues with that draft, but it also raises some
interesting points.)

   Brian


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> Brian E Carpenter <mailto:brian.e.carpenter@gmail.com>
> 10 June 2014 01:04
> Hi Lorenzo,
>
> On 09/06/2014 16:19, Lorenzo Colitti wrote:
>> On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya<sarikaya2012@gmail.com>
>> wrote:
>>
>>> I revised the draft and the revision can be found below.
>>> Please let me know if there are any issues.
>>>
>> I have several concerns with this draft and do not support its adoption.
>>
>> First: as defined, the next hop option completely removes the fate-sharing
>> properties of IPv6 route configuration.
>
> I think that's an intrinsic problem with trying to make SADR work.
> Only an intelligence that has some sort of overview can get this
> right, i.e. assemble a complete and consistent set of SADR rules
> that will always select the correct first hop to get a packet
> into a part of the IGP system that will forward it towards the
> correct site egress.
>
> I remain to be convinced that this can actually be done by
> distributed intelligence; but in any case, I think we are bound
> to lose fate-sharing, regardless of whether the SADR rules
> come via RAs, DHCPv6, or some other mechanism.
>
> So I'd put it another way: until we have a general model for
> how the SADR rules will be computed and distributed, defining
> specifics of RA or DHCPv6 messages is maybe premature.
>
> <snip>
>
>> ... So this option, which is proposed precisely to avoid an
>> inter-router protocol ends up needing an inter-router protocol in order to
>> work properly.
>>
>> It's worth noting that we have this problem in IPv4 today - because DHCPv4
>> does not share fate with routers, many networks are forced to run
>> redundancy protocols between routers (e.g., VRRP). We should not need to do
>> this in IPv6.
>
> But where's the existence proof that we can avoid it?

>> Second: this breaks the convention that routers are identified by
>> link-local addresses: because the address options do not contain a scope,
>> there is no way to use a link-local address in the next hop option, as it
>> would be meaningless. Thus it must be assumed that the IP address in the
>> next hop option must have global scope. But using global-scope addresses
>> removes the ability we have today to do seamless renumbering of IPv6
>> addresses using multiple prefixes.
>
> I suppose we could argue that each router on a link could be aware of
> all other routers on the same link, and therefore could know the
> appropriate link-local address. Or we could argue that each router
> should only send Next Hop RAs that pertain to itself. But again, that
> points to the fact that we need a general model before we finalise specifics.
>
> If this was the only issue for seamless renumbering, I'd be a
> happy man.
>
>> Third: the multiple-interface model is much more crude than that currently
>> being proposed in the MIF working group. This draft should look at that
>> architecture, particularly with regard to explicit provisioning domains and
>> trust levels.
>
> I agree, although how PVDs will be reduced to code is still a bit
> of a mystery to me. Once again: what's the general model for SADR?
>
> (For those in a mood for more brain punishment, see
> http://tools.ietf.org/html/draft-shyam-site-multi . There are
> many issues with that draft, but it also raises some
> interesting points.)
>
>     Brian
> ------------------------------------------------------------------------
FWIW I suspect that we are heading towards a scenario where such 
multi-homed end systems are forced to take part in one or more routing 
protocols, and in a manner similar to an EIGRP stub router or a BGP 
multi-homed AS i.e. the multi-homed hosts establish neighbors with 
multiple upstream routers (possibly from multiple ASes), they speak the 
native routing protocol(s), they learn routes in the same way as 
fully-fledged routers (fate sharing), but they do not/ cannot acts as 
transit devices that forward traffic not destined to or sourced from 
themselves (loop and policy violation prevention).

IMHO attempting to shoehorn this function into ICMP/ RA is not going to 
cut it.

-- 
Regards,
RayH


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On Tue, Jun 10, 2014 at 12:57 PM, Ray Hunter <v6ops@globis.net> wrote:
>> Brian E Carpenter <mailto:brian.e.carpenter@gmail.com>
>> 10 June 2014 01:04
>>
>> Hi Lorenzo,
>>
>> On 09/06/2014 16:19, Lorenzo Colitti wrote:
>>>
>>> On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya<sarikaya2012@gmail.com>
>>> wrote:
>>>
>>>> I revised the draft and the revision can be found below.
>>>> Please let me know if there are any issues.
>>>>
>>> I have several concerns with this draft and do not support its adoption.
>>>
>>> First: as defined, the next hop option completely removes the
>>> fate-sharing
>>> properties of IPv6 route configuration.
>>
>>
>> I think that's an intrinsic problem with trying to make SADR work.
>> Only an intelligence that has some sort of overview can get this
>> right, i.e. assemble a complete and consistent set of SADR rules
>> that will always select the correct first hop to get a packet
>> into a part of the IGP system that will forward it towards the
>> correct site egress.
>>
>> I remain to be convinced that this can actually be done by
>> distributed intelligence; but in any case, I think we are bound
>> to lose fate-sharing, regardless of whether the SADR rules
>> come via RAs, DHCPv6, or some other mechanism.
>>
>> So I'd put it another way: until we have a general model for
>> how the SADR rules will be computed and distributed, defining
>> specifics of RA or DHCPv6 messages is maybe premature.
>>
>> <snip>
>>
>>> ... So this option, which is proposed precisely to avoid an
>>> inter-router protocol ends up needing an inter-router protocol in order
>>> to
>>> work properly.
>>>
>>> It's worth noting that we have this problem in IPv4 today - because
>>> DHCPv4
>>> does not share fate with routers, many networks are forced to run
>>> redundancy protocols between routers (e.g., VRRP). We should not need to
>>> do
>>> this in IPv6.
>>
>>
>> But where's the existence proof that we can avoid it?
>
>
>>> Second: this breaks the convention that routers are identified by
>>> link-local addresses: because the address options do not contain a scope,
>>> there is no way to use a link-local address in the next hop option, as it
>>> would be meaningless. Thus it must be assumed that the IP address in the
>>> next hop option must have global scope. But using global-scope addresses
>>> removes the ability we have today to do seamless renumbering of IPv6
>>> addresses using multiple prefixes.
>>
>>
>> I suppose we could argue that each router on a link could be aware of
>> all other routers on the same link, and therefore could know the
>> appropriate link-local address. Or we could argue that each router
>> should only send Next Hop RAs that pertain to itself. But again, that
>> points to the fact that we need a general model before we finalise
>> specifics.
>>
>> If this was the only issue for seamless renumbering, I'd be a
>> happy man.
>>
>>> Third: the multiple-interface model is much more crude than that
>>> currently
>>> being proposed in the MIF working group. This draft should look at that
>>> architecture, particularly with regard to explicit provisioning domains
>>> and
>>> trust levels.
>>
>>
>> I agree, although how PVDs will be reduced to code is still a bit
>> of a mystery to me. Once again: what's the general model for SADR?
>>
>> (For those in a mood for more brain punishment, see
>> http://tools.ietf.org/html/draft-shyam-site-multi . There are
>> many issues with that draft, but it also raises some
>> interesting points.)
>>
>>     Brian
>> ------------------------------------------------------------------------
>
> FWIW I suspect that we are heading towards a scenario where such multi-homed
> end systems are forced to take part in one or more routing protocols, and in
> a manner similar to an EIGRP stub router or a BGP multi-homed AS i.e. the
> multi-homed hosts establish neighbors with multiple upstream routers
> (possibly from multiple ASes), they speak the native routing protocol(s),
> they learn routes in the same way as fully-fledged routers (fate sharing),
> but they do not/ cannot acts as transit devices that forward traffic not
> destined to or sourced from themselves (loop and policy violation
> prevention).
>


> IMHO attempting to shoehorn this function into ICMP/ RA is not going to cut
> it.
>

In the near field communication (NFC) scenario the multi-homed host is
routing packets for IP sensors that are embedded in the host. Also the
host may be routing packets from one interface to the other.
Sorry I don't understand your concern.

Regards,

Behcet
> --
> Regards,
> RayH
>


From nobody Tue Jun 10 13:47:22 2014
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Ole Troan <otroan@employees.org>
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Date: Tue, 10 Jun 2014 22:45:25 +0200
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Brian,

>> First: as defined, the next hop option completely removes the =
fate-sharing
>> properties of IPv6 route configuration.=20
>=20
> I think that's an intrinsic problem with trying to make SADR work.
> Only an intelligence that has some sort of overview can get this
> right, i.e. assemble a complete and consistent set of SADR rules
> that will always select the correct first hop to get a packet
> into a part of the IGP system that will forward it towards the
> correct site egress.

if we're talking about SADR as in =
http://tools.ietf.org/html/draft-troan-homenet-sadr-01,
then the context of SADR is within multi prefix multi-homing. i.e. =
multi-homing with a single interface. the network does SADR, the hosts =
can optimize by following rule 5.5. of 6724. and it assumes a strong =
host model (1122).

while for a host directly connected to the egress routers, there does =
not need to be any exchange of information between those. for a general =
topology the expectation is that a routing protocol is used and all =
routers in the network must follow the same forwarding paradigm.

could you expand on what you think is missing, and what you mean by =
"only an intelligence..."?

and back to this draft, I don't quite understand what problem the draft =
sets out to solve.

cheers,
Ole

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Date: Wed, 11 Jun 2014 00:21:20 +0300
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Subject: Re: LLN Plugfest at IETF 90
From: Ines  Robles <mariainesrobles@googlemail.com>
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Dear all,

This is a kindly reminder :-) .

We call for participants. The deadline to receive topics to present or
demonstrate in the event is 06/20/2014 :-). Interested audience is also
welcome and we encourage audience to participate in the feedback session.

More information:
https://bitbucket.org/6tisch/meetings/wiki/140720a_ietf90_toronto_plugfest

We hope to see you there!

Xavier and Ines.


2014-06-02 1:02 GMT+03:00 Ines Robles <mariainesrobles@googlemail.com>:

> Dear all,
>
> We would like to announce the plugfest event at the 90th IETF Meeting in
> Toronto.
>
> We call for participants. The deadline to receive topics to present or
> demonstrate in the event is 06/13/2014. Interested audience is also welcome
> and we encourage audience to participate in the feedback session.
>
> Please find next the plugfest information.
>
> We hope to see you there!
>
> Xavier and Ines.
>
> -----------------------
> Low Power and Lossy Networks plugfest at IETF90
>
> The IETF 6TiSCH <https://datatracker.ietf.org/wg/6tisch/charter/>, IETF
> 6lo <https://datatracker.ietf.org/wg/6lo/charter/> and IETF ROLL
> <https://datatracker.ietf.org/wg/roll/charter/> working groups are
> hosting an informal "plugfest" event at the IETF90 meeting, in Toronto, CA,
> during the week of July 20-25 2014.
> Goals
>
> The goal of this event is to bring together people interested in hands-on
> experience around the technology developed by the 6TiSCH, 6lo and ROLL
> working groups, with a particular focus on the TSCH mode of IEEE802.15.4e,
> 6lowpan, RPL and new WG specifications.
> When and where ?
>
>    - *Date*: Sunday July 20 2014, 0900-1300 EDT.
>    - *Location*: Meeting Room TBD, Fairmont Royal York Hotel 100 Front
>    Street W, Toronto, CA.
>
> *Early access: TBD if the plugfest room will be open starting 8am EDT on
> Sunday 20 2014 to allow people to set up.*
> Topology proposed - TBD
>
>    - Star topology
>    - IPv6
>
> Complementary angles
>
> This event will feature the following complementary angles:
>
>    - Interoperation
>    - Demonstration
>    - Tools
>
> Focus 1: Interoperation
>
> Download the interoperation guidelines:
>
>    - - TBD for Toronto - interoperation guidelines, version 1 (London)
>    <https://bitbucket.org/6tisch/meetings/src/master/140306_ietf89_plugfest_london/ietf89_6tisch_interop_guidelines_v01.pdf>
>
> The goal is to achieve interoperation between different hardware and
> software implementations on the different aspects addressed by 6lo, 6TiSCH
> and ROLL WGs. This include 6TiSCH minimal draft implementation,
> demonstrating TSCH synchronization and OF0 for RPL on a minimal network.
> 6lowpan to demostrate cross link layer inter-operability by means of
> bridges or backbones routers. Storing and non-storing RPL implementation
> including its coexistance in different sub-networks.
>
> The focus during this event is open to demonstrating 6lo, ROLL or 6TiSCH
> drafts implementations, including but not limited to: e.g. - 6TiSCH minimal
> draft: http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00. - TBD
>
> Participants are encouraged to bring devices which implement parts or all
> of the listed drafts.
>
> Levels of interoperation are proposed:
>
>    - *Level 1*, star topology. A single BBR devices acts as the time
>    source neighbor for all other nodes. Nodes need to demonstrate frame-based
>    and acknowledgement-based synchronization. The static TSCH schedule, as
>    well as all slot timings are taken from draft-ietf-6tisch-minimal-00.
>    - *Level 2*, multi-hop topology. This level builds upon level 1. The
>    goal of this level is full compliance to draft-ietf-6tisch-minimal-00,
>    including multi-hop routing (RPL).
>    - *Level 3*, on-the-fly scheduling. [optional] Preliminary
>    implementations of
>    http://tools.ietf.org/html/draft-dujovne-6tisch-on-the-fly can be
>    shown.
>    - *Level 4*, drafts from ROLL, such as:
>    draft-ietf-roll-mpl-parameter-configuration,
>    draft-ko-roll-mix-network-pathology, Opportunistic routing, selective DIS,
>    and others that participants want to show
>    - *Level 5*, drafts from 6lo, such as: draft-ietf-6lo-btle,
>    draft-ietf-6lo-ghc,draft-ietf-6lo-lowpanz, and others that participants
>    want to show.
>    - *Level 6* Other drafts, such as
>    draft-thubert-6man-flow-label-for-rpl, etc.
>
> Focus 2: Demonstration
>
> Participants are encouraged to bring devices and technology based on
> 6TiSCH, 6lo and ROLL which they believe can be of interest for the other
> participants. These devices may or may not participate in the
> interoperation event. Demonstration of more complete systems are
> encouraged, for example systems which show the interconnection of a 6TiSCH
> based mesh to traditional networks.
> Focus 3: Tools
>
> Participants are encouraged to bring and present different tools developed
> around 6TiSCH/6lo/ROLL networks. Possible tools include, but are not
> limited to:
>
>    - acquisition devices (i.e. "sniffers")
>    - packet analysis tools (e.g. Wireshark)
>    - simulation/emulation platforms
>
> Important Dates
>
> The preparation of this event will be held during a portion of the
> bi-weekly 6TiSCH call (*To Be Decided how and when!!!*). In particular:
>
>    - *06/02/2014* Announcement of the plugfest event to the WG/ML related
>    with constrained devices, such as: 6tisch, 6lo, roll, core, lwig, dtls-iot,
>    coman, ace, etc.
>    - *06/06/2014* Adoption of the plugfest call by the WGs, and call for
>    participants at each group.
>    - *06/02/2014-06/13/2014* Participants have contacted the plugfest
>    chairs (Xavier or Ines) with a tentative description of what they wish to
>    participate in.
>    - *06/20/2014* Synchronization point 1. Participants can share the
>    state of advancement of the implementation and raise blocking points.
>    - *07/11/2014* Synchronization point 2. Participants can share the
>    state of advancement of the implementation and raise blocking points.
>    - *07/20/2014*. Plugfest at IETF90.
>
> Tentative Agenda from 9:00 to 13:00
>
>    - *[09.00]* Welcome and Initial Instructions
>    - *[09.05]* Participants Pitch (5 min per Participant)
>    - *[09.45]* Participants Pitch Tools (5 min per Participant)
>    - *[10.15]* Interoperation (Islands)
>    - *[11.50]* Feedback and open discussion.
>    - *[12.40]* Acknowledgements and Plugfest End
>
> For More Information
>
>    - *Contact*: Xavi Vilajosana xvilajosana@eecs.berkeley.edu - Ines
>    Robles mariainesrobles@gmail.com
>
> Note Well
>
> This event is organized as part of the IETF90 standardization meeting. You
> need to register to the IETF90 conference to be able to participate. Daily
> passes are available. The IETF Note Well applies to this plugfest, see
> http://www.ietf.org/about/note-well.html.
> About
>
> The IETF 6TiSCH working group standardizes mechanisms focusing on enabling
> IPv6 over the TSCH mode of the IEEE802.15.4e standard. You can access the
> charter at http://datatracker.ietf.org/wg/6tisch/charter/, which also
> contains links to the mailing list and the Internet-Drafts published by the
> group. 6TiSCH holds weekly phone calls on Friday 8am PST. Participation is
> open, and is subject to the IETF Note Well.
>
> The IETF 6lo working group focuses on the work that facilitates IPv6
> connectivity over constrained node networks with the characteristics of:
> limited power, memory and processing resources;. You can access the charter
> at https://datatracker.ietf.org/wg/6lo/charter/, which also contains
> links to the mailing list and the I-D published by the group.
>
> The IETF ROLL working group is focused on routing issues for LLN (Low
> Power and Lossy Networks), in IPv6 routing architectural framework for the
> industrial, connected home, building and urban sensor networks application
> scenarios. You can access the charter at
> https://datatracker.ietf.org/wg/roll/charter/, which also contains links
> to the mailing list and the I-D published by the group.
>

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<div dir=3D"ltr">Dear all,<div><br></div><div>This is a kindly reminder :-)=
 .</div><div><br></div><div><span style=3D"color:rgb(0,0,0);font-family:ari=
al,helvetica,sans-serif">We call for participants. The deadline to receive =
topics to present or demonstrate in the event is 06/20/2014 :-). Interested=
 audience is also welcome and we encourage audience to participate in the f=
eedback session.</span></div>

<div><span style=3D"color:rgb(0,0,0);font-family:arial,helvetica,sans-serif=
"><br></span></div><div><span style=3D"color:rgb(0,0,0);font-family:arial,h=
elvetica,sans-serif">More information:=C2=A0</span><font color=3D"#000000" =
face=3D"arial, helvetica, sans-serif"><a href=3D"https://bitbucket.org/6tis=
ch/meetings/wiki/140720a_ietf90_toronto_plugfest" target=3D"_blank">https:/=
/bitbucket.org/6tisch/meetings/wiki/140720a_ietf90_toronto_plugfest</a></fo=
nt></div>

<div><br></div><div><span style=3D"color:rgb(0,0,0);font-family:arial,helve=
tica,sans-serif">We hope to see you there!</span><br></div><div><span style=
=3D"color:rgb(0,0,0);font-family:arial,helvetica,sans-serif"><br></span></d=
iv>

<div><font color=3D"#000000" face=3D"arial, helvetica, sans-serif">Xavier a=
nd Ines.</font></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">2014-06-02 1:02 GMT+03:00 Ines  Robles <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:mariainesrobles@googlemail.com" target=3D"_blank">mariainesrobl=
es@googlemail.com</a>&gt;</span>:<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"><div dir=3D"ltr"><div><div><span style=3D"font-family:aria=
l,helvetica,sans-serif;color:rgb(0,0,0)">Dear all,</span><br>

</div><font face=3D"arial, helvetica, sans-serif"><br style=3D"color:rgb(0,=
0,0)"><span style=3D"color:rgb(0,0,0)">We would like to announce the plugfe=
st event at the 90th IETF Meeting in Toronto.</span></font><div>

<span style=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif=
"><br></font></span></div></div><div><span style=3D"color:rgb(0,0,0)"><font=
 face=3D"arial, helvetica, sans-serif">We call for participants. The deadli=
ne to receive topics to present or demonstrate in the event is 06/13/2014. =
Interested audience is also welcome and we encourage audience to participat=
e in the feedback session.</font></span></div>



<div><div><span style=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, =
sans-serif"><br></font></span></div><div><span style=3D"color:rgb(0,0,0)"><=
font face=3D"arial, helvetica, sans-serif">Please find next the plugfest in=
formation.=C2=A0</font></span><div>



<font face=3D"arial, helvetica, sans-serif"><br></font></div><div><span sty=
le=3D"color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif">We hope=
 to see you there!</font></span><div><font color=3D"#000000" face=3D"arial,=
 helvetica, sans-serif"><br>



</font></div><div><div style=3D"color:rgb(0,0,0)"><font face=3D"arial, helv=
etica, sans-serif">Xavier and Ines.</font></div></div></div></div><div styl=
e=3D"font-family:&#39;Times New Roman&#39;;font-size:13px;color:rgb(0,0,0)"=
>


<font size=3D"3"><br>
</font></div><div style=3D"font-family:&#39;Times New Roman&#39;;font-size:=
13px;color:rgb(0,0,0)"><font size=3D"3">-----------------------</font></div=
><div><h1 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-si=
ze:24px;margin:20px 0px 10px;padding:0px;font-weight:normal;line-height:1.2=
5">



Low Power and Lossy Networks plugfest at IETF90</h1><p style=3D"color:rgb(5=
1,51,51);font-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;pa=
dding:0px;word-wrap:break-word;line-height:20px">The=C2=A0<a href=3D"https:=
//datatracker.ietf.org/wg/6tisch/charter/" style=3D"color:rgb(59,115,175);t=
ext-decoration:none" target=3D"_blank">IETF 6TiSCH</a>,=C2=A0<a href=3D"htt=
ps://datatracker.ietf.org/wg/6lo/charter/" style=3D"color:rgb(59,115,175);t=
ext-decoration:none" target=3D"_blank">IETF 6lo</a>=C2=A0and=C2=A0<a href=
=3D"https://datatracker.ietf.org/wg/roll/charter/" style=3D"color:rgb(59,11=
5,175);text-decoration:none" target=3D"_blank">IETF ROLL</a>=C2=A0working g=
roups are hosting an informal &quot;plugfest&quot; event at the IETF90 meet=
ing, in Toronto, CA, during the week of July 20-25 2014.</p>



<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Goals=
</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">



The goal of this event is to bring together people interested in hands-on e=
xperience around the technology developed by the 6TiSCH, 6lo and ROLL worki=
ng groups, with a particular focus on the TSCH mode of IEEE802.15.4e, 6lowp=
an, RPL and new WG specifications.</p>



<h3 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:18p=
x;margin:20px 0px 0px;padding:0px;line-height:1.3888888888888888;font-weigh=
t:normal">When and where ?</h3><ul style=3D"color:rgb(51,51,51);font-family=
:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">



<li style=3D"word-wrap:break-word"><strong>Date</strong>: Sunday July 20 20=
14, 0900-1300 EDT.</li><li style=3D"word-wrap:break-word"><strong>Location<=
/strong>: Meeting Room TBD, Fairmont Royal York Hotel 100 Front Street W, T=
oronto, CA.</li>



</ul><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
"><strong>Early access: TBD if the plugfest room will be open starting 8am =
EDT on Sunday 20 2014 to allow people to set up.</strong></p>



<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Topol=
ogy proposed - TBD</h2><ul style=3D"color:rgb(51,51,51);font-family:Arial,s=
ans-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">



<li style=3D"word-wrap:break-word">Star topology</li><li style=3D"word-wrap=
:break-word">IPv6</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Ari=
al,sans-serif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:no=
rmal;line-height:1.5">



Complementary angles</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,=
sans-serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-w=
ord;line-height:20px">This event will feature the following complementary a=
ngles:</p>



<ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14p=
x;margin:10px 0px 0px;line-height:20px"><li style=3D"word-wrap:break-word">=
Interoperation</li><li style=3D"word-wrap:break-word">Demonstration</li><li=
 style=3D"word-wrap:break-word">



Tools</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-seri=
f;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-he=
ight:1.5">Focus 1: Interoperation</h2>
<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Dow=
nload the interoperation guidelines:</p><ul style=3D"color:rgb(51,51,51);fo=
nt-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:2=
0px">



<li style=3D"word-wrap:break-word"><a href=3D"https://bitbucket.org/6tisch/=
meetings/src/master/140306_ietf89_plugfest_london/ietf89_6tisch_interop_gui=
delines_v01.pdf" style=3D"color:rgb(59,115,175);text-decoration:none" targe=
t=3D"_blank"> - TBD for Toronto - interoperation guidelines, version 1 (Lon=
don)</a></li>



</ul><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">The goal is to achieve interoperation between different hardware and soft=
ware implementations on the different aspects addressed by 6lo, 6TiSCH and =
ROLL WGs. This include 6TiSCH minimal draft implementation, demonstrating T=
SCH synchronization and OF0 for RPL on a minimal network. 6lowpan to demost=
rate cross link layer inter-operability by means of bridges or backbones ro=
uters. Storing and non-storing RPL implementation including its coexistance=
 in different sub-networks.</p>



<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 focus during this event is open to demonstrating 6lo, ROLL or 6TiSCH draft=
s implementations, including but not limited to: e.g. - 6TiSCH minimal draf=
t:=C2=A0<a href=3D"http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00"=
 rel=3D"nofollow" style=3D"color:rgb(59,115,175);text-decoration:none" targ=
et=3D"_blank">http://tools.ietf.org/html/draft-ietf-6tisch-minimal-00</a>. =
- TBD</p>



<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Par=
ticipants are encouraged to bring devices which implement parts or all of t=
he listed drafts.</p>



<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">Lev=
els of interoperation are proposed:</p><ul style=3D"color:rgb(51,51,51);fon=
t-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:20=
px">



<li style=3D"word-wrap:break-word"><strong>Level 1</strong>, star topology.=
 A single BBR devices acts as the time source neighbor for all other nodes.=
 Nodes need to demonstrate frame-based and acknowledgement-based synchroniz=
ation. The static TSCH schedule, as well as all slot timings are taken from=
 draft-ietf-6tisch-minimal-00.</li>



<li style=3D"word-wrap:break-word"><strong>Level 2</strong>, multi-hop topo=
logy. This level builds upon level 1. The goal of this level is full compli=
ance to draft-ietf-6tisch-minimal-00, including multi-hop routing (RPL).</l=
i>



<li style=3D"word-wrap:break-word"><strong>Level 3</strong>, on-the-fly sch=
eduling. [optional] Preliminary implementations of=C2=A0<a href=3D"http://t=
ools.ietf.org/html/draft-dujovne-6tisch-on-the-fly" rel=3D"nofollow" style=
=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">http://to=
ols.ietf.org/html/draft-dujovne-6tisch-on-the-fly</a>=C2=A0can be shown.</l=
i>



<li style=3D"word-wrap:break-word"><strong>Level 4</strong>, drafts from RO=
LL, such as: draft-ietf-roll-mpl-parameter-configuration, draft-ko-roll-mix=
-network-pathology, Opportunistic routing, selective DIS, and others that p=
articipants want to show</li>



<li style=3D"word-wrap:break-word"><strong>Level 5</strong>, drafts from 6l=
o, such as: draft-ietf-6lo-btle, draft-ietf-6lo-ghc,draft-ietf-6lo-lowpanz,=
 and others that participants want to show.</li><li style=3D"word-wrap:brea=
k-word">



<strong>Level 6</strong>=C2=A0Other drafts, such as draft-thubert-6man-flow=
-label-for-rpl, etc.</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:=
Arial,sans-serif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight=
:normal;line-height:1.5">



Focus 2: Demonstration</h2><p style=3D"color:rgb(51,51,51);font-family:Aria=
l,sans-serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break=
-word;line-height:20px">Participants are encouraged to bring devices and te=
chnology based on 6TiSCH, 6lo and ROLL which they believe can be of interes=
t for the other participants. These devices may or may not participate in t=
he interoperation event. Demonstration of more complete systems are encoura=
ged, for example systems which show the interconnection of a 6TiSCH based m=
esh to traditional networks.</p>



<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">Focus=
 3: Tools</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;=
font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-he=
ight:20px">



Participants are encouraged to bring and present different tools developed =
around 6TiSCH/6lo/ROLL networks. Possible tools include, but are not limite=
d to:</p><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font=
-size:14px;margin:10px 0px 0px;line-height:20px">



<li style=3D"word-wrap:break-word">acquisition devices (i.e. &quot;sniffers=
&quot;)</li><li style=3D"word-wrap:break-word">packet analysis tools (e.g. =
Wireshark)</li><li style=3D"word-wrap:break-word">simulation/emulation plat=
forms</li>



</ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-siz=
e:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">=
Important Dates</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-=
serif;font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;l=
ine-height:20px">



The preparation of this event will be held during a portion of the bi-weekl=
y 6TiSCH call (<strong>To Be Decided how and when!!!</strong>). In particul=
ar:</p><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-s=
ize:14px;margin:10px 0px 0px;line-height:20px">



<li style=3D"word-wrap:break-word"><strong>06/02/2014</strong>=C2=A0Announc=
ement of the plugfest event to the WG/ML related with constrained devices, =
such as: 6tisch, 6lo, roll, core, lwig, dtls-iot, coman, ace, etc.</li><li =
style=3D"word-wrap:break-word">



<strong>06/06/2014</strong>=C2=A0Adoption of the plugfest call by the WGs, =
and call for participants at each group.</li><li style=3D"word-wrap:break-w=
ord"><strong>06/02/2014-06/13/2014</strong>=C2=A0Participants have contacte=
d the plugfest chairs (Xavier or Ines) with a tentative description of what=
 they wish to participate in.</li>



<li style=3D"word-wrap:break-word"><strong>06/20/2014</strong>=C2=A0Synchro=
nization point 1. Participants can share the state of advancement of the im=
plementation and raise blocking points.</li><li style=3D"word-wrap:break-wo=
rd">


<strong>07/11/2014</strong>=C2=A0Synchronization point 2. Participants can =
share the state of advancement of the implementation and raise blocking poi=
nts.</li>
<li style=3D"word-wrap:break-word"><strong>07/20/2014</strong>. Plugfest at=
 IETF90.</li></ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-s=
erif;font-size:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line=
-height:1.5">



Tentative Agenda from 9:00 to 13:00</h2><ul style=3D"color:rgb(51,51,51);fo=
nt-family:Arial,sans-serif;font-size:14px;margin:10px 0px 0px;line-height:2=
0px"><li style=3D"word-wrap:break-word"><em>[09.00]</em>=C2=A0Welcome and I=
nitial Instructions</li>



<li style=3D"word-wrap:break-word"><em>[09.05]</em>=C2=A0Participants Pitch=
 (5 min per Participant)</li><li style=3D"word-wrap:break-word"><em>[09.45]=
</em>=C2=A0Participants Pitch Tools (5 min per Participant)</li><li style=
=3D"word-wrap:break-word">



<em>[10.15]</em>=C2=A0Interoperation (Islands)</li><li style=3D"word-wrap:b=
reak-word"><em>[11.50]</em>=C2=A0Feedback and open discussion.</li><li styl=
e=3D"word-wrap:break-word"><em>[12.40]</em>=C2=A0Acknowledgements and Plugf=
est End</li></ul>



<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">For M=
ore Information</h2><ul style=3D"color:rgb(51,51,51);font-family:Arial,sans=
-serif;font-size:14px;margin:10px 0px 0px;line-height:20px">



<li style=3D"word-wrap:break-word"><strong>Contact</strong>: Xavi Vilajosan=
a=C2=A0<a href=3D"mailto:xvilajosana@eecs.berkeley.edu" style=3D"color:rgb(=
59,115,175);text-decoration:none" target=3D"_blank">xvilajosana@eecs.berkel=
ey.edu</a>=C2=A0- Ines Robles=C2=A0<a href=3D"mailto:mariainesrobles@gmail.=
com" style=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank"=
>mariainesrobles@gmail.com</a></li>



</ul><h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-siz=
e:20px;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">=
Note Well</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;=
font-size:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-he=
ight:20px">



This event is organized as part of the IETF90 standardization meeting. You =
need to register to the IETF90 conference to be able to participate. Daily =
passes are available. The IETF Note Well applies to this plugfest, see=C2=
=A0<a href=3D"http://www.ietf.org/about/note-well.html" rel=3D"nofollow" st=
yle=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">http:/=
/www.ietf.org/about/note-well.html</a>.</p>



<h2 style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:20p=
x;margin:20px 0px 0px;padding:0px;font-weight:normal;line-height:1.5">About=
</h2><p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size=
:14px;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px=
">



The IETF 6TiSCH working group standardizes mechanisms focusing on enabling =
IPv6 over the TSCH mode of the IEEE802.15.4e standard. You can access the c=
harter at=C2=A0<a href=3D"http://datatracker.ietf.org/wg/6tisch/charter/" r=
el=3D"nofollow" style=3D"color:rgb(59,115,175);text-decoration:none" target=
=3D"_blank">http://datatracker.ietf.org/wg/6tisch/charter/</a>, which also =
contains links to the mailing list and the Internet-Drafts published by the=
 group. 6TiSCH holds weekly phone calls on Friday 8am PST. Participation is=
 open, and is subject to the IETF Note Well.</p>



<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 IETF 6lo working group focuses on the work that facilitates IPv6 connectiv=
ity over constrained node networks with the characteristics of: limited pow=
er, memory and processing resources;. You can access the charter at=C2=A0<a=
 href=3D"https://datatracker.ietf.org/wg/6lo/charter/" rel=3D"nofollow" sty=
le=3D"color:rgb(59,115,175);text-decoration:none" target=3D"_blank">https:/=
/datatracker.ietf.org/wg/6lo/charter/</a>, which also contains links to the=
 mailing list and the I-D published by the group.</p>



<p style=3D"color:rgb(51,51,51);font-family:Arial,sans-serif;font-size:14px=
;margin:10px 0px 0px;padding:0px;word-wrap:break-word;line-height:20px">The=
 IETF ROLL working group is focused on routing issues for LLN (Low Power an=
d Lossy Networks), in IPv6 routing architectural framework for the industri=
al, connected home, building and urban sensor networks application scenario=
s. You can access the charter at=C2=A0<a href=3D"https://datatracker.ietf.o=
rg/wg/roll/charter/" rel=3D"nofollow" style=3D"color:rgb(59,115,175);text-d=
ecoration:none" target=3D"_blank">https://datatracker.ietf.org/wg/roll/char=
ter/</a>, which also contains links to the mailing list and the I-D publish=
ed by the group.</p>



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

--001a11339e2eba82fc04fb81e825--


From nobody Tue Jun 10 20:06:02 2014
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Date: Wed, 11 Jun 2014 15:05:58 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Ole Troan <otroan@employees.org>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On 11/06/2014 08:45, Ole Troan wrote:
> Brian,
> 
>>> First: as defined, the next hop option completely removes the fate-sharing
>>> properties of IPv6 route configuration. 
>> I think that's an intrinsic problem with trying to make SADR work.
>> Only an intelligence that has some sort of overview can get this
>> right, i.e. assemble a complete and consistent set of SADR rules
>> that will always select the correct first hop to get a packet
>> into a part of the IGP system that will forward it towards the
>> correct site egress.
> 
> if we're talking about SADR as in http://tools.ietf.org/html/draft-troan-homenet-sadr-01,
> then the context of SADR is within multi prefix multi-homing. i.e. multi-homing with a single interface. the network does SADR, the hosts can optimize by following rule 5.5. of 6724. and it assumes a strong host model (1122).

That isn't the general case, and probably MIF isn't the general
case either, and both scenarios can arise in enterprise networks
too. I'm not saying that one solutions fits all cases, but I'm
thinking that we need an overview document that describes all cases.

> while for a host directly connected to the egress routers, there does not need to be any exchange of information between those. for a general topology the expectation is that a routing protocol is used and all routers in the network must follow the same forwarding paradigm.

But there may still be multiple routers per link, and/or
multiple interfaces per host, so hosts have to pick an address
pair, an outbound interface and a next hop.

> could you expand on what you think is missing, and what you mean by "only an intelligence..."?

That overview document is missing, and I suspect it will turn
out that in the general case, hosts will need information that
they could only get by participating in the routing protocol
(which is distributed intelligence).

> and back to this draft, I don't quite understand what problem the draft sets out to solve.

Actually I've come to agree with you, which is why I think we
need that overview.

    Brian


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On Tue, Jun 10, 2014 at 8:04 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > First: as defined, the next hop option completely removes the
> fate-sharing
> > properties of IPv6 route configuration.
>
> I think that's an intrinsic problem with trying to make SADR work.
> Only an intelligence that has some sort of overview can get this
> right, i.e. assemble a complete and consistent set of SADR rules
> that will always select the correct first hop to get a packet
> into a part of the IGP system that will forward it towards the
> correct site egress.
>

I don't see why. In order to make host-based SADR work, you need the host
to know:

1. It should not use source prefix X to talk to nexthop Y.
2. It should prefer source prefix X to talk to destination prefix P.
3. It should prefer source prefix X to talk to nexthop Y.

I don't see how any of these require giving up fate sharing. I do see how
these constraints will cause things to break if you don't have fate sharing.

Note that host-based SADR is not the case in homenet, BTW; homenet takes
care of SADR in the network.

--047d7b6d84847f061f04fb8704e3
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On T=
ue, Jun 10, 2014 at 8:04 AM, Brian E Carpenter <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:brian.e.carpenter@gmail.com" target=3D"_blank">brian.e.carpente=
r@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"><div class=3D"">&gt; First: as defined, the next hop optio=
n completely removes the fate-sharing<br>


&gt; properties of IPv6 route configuration.<br>
<br>
</div>I think that&#39;s an intrinsic problem with trying to make SADR work=
.<br>
Only an intelligence that has some sort of overview can get this<br>
right, i.e. assemble a complete and consistent set of SADR rules<br>
that will always select the correct first hop to get a packet<br>
into a part of the IGP system that will forward it towards the<br>
correct site egress.<br></blockquote><div><br></div><div>I don&#39;t see wh=
y. In order to make host-based SADR work, you need the host to know:</div><=
div><br></div><div>1. It should not use source prefix X to talk to nexthop =
Y.</div>

<div>2. It should prefer source prefix X to talk to destination prefix P.</=
div><div>3. It should prefer source prefix X to talk to nexthop Y.</div><di=
v><br></div><div>I don&#39;t see how any of these require giving up fate sh=
aring. I do see how these constraints will cause things to break if you don=
&#39;t have fate sharing.</div>

<div><br></div><div>Note that host-based SADR is not the case in homenet, B=
TW; homenet takes care of SADR in the network.</div></div></div></div>

--047d7b6d84847f061f04fb8704e3--


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Date: Wed, 11 Jun 2014 16:16:11 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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To: Lorenzo Colitti <lorenzo@google.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On 11/06/2014 15:26, Lorenzo Colitti wrote:
> On Tue, Jun 10, 2014 at 8:04 AM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>>> First: as defined, the next hop option completely removes the
>> fate-sharing
>>> properties of IPv6 route configuration.
>> I think that's an intrinsic problem with trying to make SADR work.
>> Only an intelligence that has some sort of overview can get this
>> right, i.e. assemble a complete and consistent set of SADR rules
>> that will always select the correct first hop to get a packet
>> into a part of the IGP system that will forward it towards the
>> correct site egress.
>>
> 
> I don't see why. In order to make host-based SADR work, you need the host
> to know:
> 
> 1. It should not use source prefix X to talk to nexthop Y.
> 2. It should prefer source prefix X to talk to destination prefix P.
> 3. It should prefer source prefix X to talk to nexthop Y.
> 
> I don't see how any of these require giving up fate sharing. I do see how
> these constraints will cause things to break if you don't have fate sharing.

But what if the X', Y', P' rules come from another source, that
doesn't share fate with the source of the X, Y, P rules?

> Note that host-based SADR is not the case in homenet, BTW; homenet takes
> care of SADR in the network.

Not, I think, if some hosts are MIFfed directly onto wireless
ISPs. That will happen, even if the homenet architecture doesn't
expect it.

   Brian
> 


From nobody Tue Jun 10 21:30:01 2014
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From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 11 Jun 2014 13:29:38 +0900
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On Wed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > I don't see how any of these require giving up fate sharing. I do see how
> > these constraints will cause things to break if you don't have fate
> sharing.
>
> But what if the X', Y', P' rules come from another source, that
> doesn't share fate with the source of the X, Y, P rules?
>

Please provide an example.

--089e01183d24a2567e04fb87e5b6
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<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <span dir="ltr">&lt;<a href="mailto:brian.e.carpenter@gmail.com" target="_blank">brian.e.carpenter@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">&gt; I don&#39;t see how any of these require giving up fate sharing. I do see how<br>


&gt; these constraints will cause things to break if you don&#39;t have fate sharing.<br>
<br>
</div></div>But what if the X&#39;, Y&#39;, P&#39; rules come from another source, that<br>
doesn&#39;t share fate with the source of the X, Y, P rules?<br></blockquote><div><br></div><div>Please provide an example.</div></div></div></div>

--089e01183d24a2567e04fb87e5b6--


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> Behcet Sarikaya <mailto:sarikaya2012@gmail.com>
> 10 June 2014 22:17
> On Tue, Jun 10, 2014 at 12:57 PM, Ray Hunter<v6ops@globis.net>  wrote:
>>> Brian E Carpenter<mailto:brian.e.carpenter@gmail.com>
>>> 10 June 2014 01:04
>>>
>>> Hi Lorenzo,
>>>
>>> On 09/06/2014 16:19, Lorenzo Colitti wrote:
>>>> On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya<sarikaya2012@gmail.com>
>>>> wrote:
>>>>
>>>>> I revised the draft and the revision can be found below.
>>>>> Please let me know if there are any issues.
>>>>>
>>>> I have several concerns with this draft and do not support its adoption.
>>>>
>>>> First: as defined, the next hop option completely removes the
>>>> fate-sharing
>>>> properties of IPv6 route configuration.
>>> I think that's an intrinsic problem with trying to make SADR work.
>>> Only an intelligence that has some sort of overview can get this
>>> right, i.e. assemble a complete and consistent set of SADR rules
>>> that will always select the correct first hop to get a packet
>>> into a part of the IGP system that will forward it towards the
>>> correct site egress.
>>>
>>> I remain to be convinced that this can actually be done by
>>> distributed intelligence; but in any case, I think we are bound
>>> to lose fate-sharing, regardless of whether the SADR rules
>>> come via RAs, DHCPv6, or some other mechanism.
>>>
>>> So I'd put it another way: until we have a general model for
>>> how the SADR rules will be computed and distributed, defining
>>> specifics of RA or DHCPv6 messages is maybe premature.
>>>
>>> <snip>
>>>
>>>> ... So this option, which is proposed precisely to avoid an
>>>> inter-router protocol ends up needing an inter-router protocol in order
>>>> to
>>>> work properly.
>>>>
>>>> It's worth noting that we have this problem in IPv4 today - because
>>>> DHCPv4
>>>> does not share fate with routers, many networks are forced to run
>>>> redundancy protocols between routers (e.g., VRRP). We should not need to
>>>> do
>>>> this in IPv6.
>>> But where's the existence proof that we can avoid it?
>>>> Second: this breaks the convention that routers are identified by
>>>> link-local addresses: because the address options do not contain a scope,
>>>> there is no way to use a link-local address in the next hop option, as it
>>>> would be meaningless. Thus it must be assumed that the IP address in the
>>>> next hop option must have global scope. But using global-scope addresses
>>>> removes the ability we have today to do seamless renumbering of IPv6
>>>> addresses using multiple prefixes.
>>> I suppose we could argue that each router on a link could be aware of
>>> all other routers on the same link, and therefore could know the
>>> appropriate link-local address. Or we could argue that each router
>>> should only send Next Hop RAs that pertain to itself. But again, that
>>> points to the fact that we need a general model before we finalise
>>> specifics.
>>>
>>> If this was the only issue for seamless renumbering, I'd be a
>>> happy man.
>>>
>>>> Third: the multiple-interface model is much more crude than that
>>>> currently
>>>> being proposed in the MIF working group. This draft should look at that
>>>> architecture, particularly with regard to explicit provisioning domains
>>>> and
>>>> trust levels.
>>> I agree, although how PVDs will be reduced to code is still a bit
>>> of a mystery to me. Once again: what's the general model for SADR?
>>>
>>> (For those in a mood for more brain punishment, see
>>> http://tools.ietf.org/html/draft-shyam-site-multi . There are
>>> many issues with that draft, but it also raises some
>>> interesting points.)
>>>
>>>      Brian
>>> ------------------------------------------------------------------------
>> FWIW I suspect that we are heading towards a scenario where such multi-homed
>> end systems are forced to take part in one or more routing protocols, and in
>> a manner similar to an EIGRP stub router or a BGP multi-homed AS i.e. the
>> multi-homed hosts establish neighbors with multiple upstream routers
>> (possibly from multiple ASes), they speak the native routing protocol(s),
>> they learn routes in the same way as fully-fledged routers (fate sharing),
>> but they do not/ cannot acts as transit devices that forward traffic not
>> destined to or sourced from themselves (loop and policy violation
>> prevention).
>>
>
>
>> IMHO attempting to shoehorn this function into ICMP/ RA is not going to cut
>> it.
>>
>
> In the near field communication (NFC) scenario the multi-homed host is
> routing packets for IP sensors that are embedded in the host.
Hmmm. Do you assume that device partnered with the NFC interface speaks 
native IPv6? Or is this actually an ALG?
> Also the
> host may be routing packets from one interface to the other.
> Sorry I don't understand your concern.
If a device is forwarding IPv6 packets that are not sourced or destined 
to it's own interface address, then it's acting as a router.

Quoting RFC2460

    router      - a node that forwards IPv6 packets not explicitly 
addressed to itself.  [See Note below].

Note: it is possible, though unusual, for a device with multiple
    interfaces to be configured to forward non-self-destined packets
    arriving from some set (fewer than all) of its interfaces, and to
    discard non-self-destined packets arriving from its other interfaces.
    Such a device must obey the protocol requirements for routers when
    receiving packets from, and interacting with neighbors over, the
    former (forwarding) interfaces.  It must obey the protocol
    requirements for hosts when receiving packets from, and interacting
    with neighbors over, the latter (non-forwarding) interfaces.

Why would the device which is acting as a router listen to RA (when 
making any decision on forwarding packets)?

Yes, I am aware of the (IMVHO poor) decision to use RA to communicate a 
default route to the WAN interface of 6204/7084 routers.

That concept is not going to fly IMHO once you have more than one "WAN" 
interface.

Unless you want to copy the stacking model of IPv4 where one router acts 
as a DHCPv4 server and the following as a DHCPv4 client + NAT.

What do you do when the NFC device you are paired to is also 
multi-interface? [NFC phone pairs with another NFC equipped phone]
> Regards,
>
> Behcet
>> --
>> Regards,
>> RayH

-- 
Regards,
RayH


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Behcet Sarikaya <sarikaya2012@gmail.com>
To: Ray Hunter <v6ops@globis.net>
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Hi Ray,


On Wed, Jun 11, 2014 at 2:00 AM, Ray Hunter <v6ops@globis.net> wrote:
>> Behcet Sarikaya <mailto:sarikaya2012@gmail.com>
>> 10 June 2014 22:17
>>
>> On Tue, Jun 10, 2014 at 12:57 PM, Ray Hunter<v6ops@globis.net>  wrote:
>>>>
>>>> Brian E Carpenter<mailto:brian.e.carpenter@gmail.com>
>>>> 10 June 2014 01:04
>>>>
>>>> Hi Lorenzo,
>>>>
>>>> On 09/06/2014 16:19, Lorenzo Colitti wrote:
>>>>>
>>>>> On Wed, Jun 4, 2014 at 1:30 AM, Behcet Sarikaya<sarikaya2012@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> I revised the draft and the revision can be found below.
>>>>>> Please let me know if there are any issues.
>>>>>>
>>>>> I have several concerns with this draft and do not support its
>>>>> adoption.
>>>>>
>>>>> First: as defined, the next hop option completely removes the
>>>>> fate-sharing
>>>>> properties of IPv6 route configuration.
>>>>
>>>> I think that's an intrinsic problem with trying to make SADR work.
>>>> Only an intelligence that has some sort of overview can get this
>>>> right, i.e. assemble a complete and consistent set of SADR rules
>>>> that will always select the correct first hop to get a packet
>>>> into a part of the IGP system that will forward it towards the
>>>> correct site egress.
>>>>
>>>> I remain to be convinced that this can actually be done by
>>>> distributed intelligence; but in any case, I think we are bound
>>>> to lose fate-sharing, regardless of whether the SADR rules
>>>> come via RAs, DHCPv6, or some other mechanism.
>>>>
>>>> So I'd put it another way: until we have a general model for
>>>> how the SADR rules will be computed and distributed, defining
>>>> specifics of RA or DHCPv6 messages is maybe premature.
>>>>
>>>> <snip>
>>>>
>>>>> ... So this option, which is proposed precisely to avoid an
>>>>> inter-router protocol ends up needing an inter-router protocol in order
>>>>> to
>>>>> work properly.
>>>>>
>>>>> It's worth noting that we have this problem in IPv4 today - because
>>>>> DHCPv4
>>>>> does not share fate with routers, many networks are forced to run
>>>>> redundancy protocols between routers (e.g., VRRP). We should not need
>>>>> to
>>>>> do
>>>>> this in IPv6.
>>>>
>>>> But where's the existence proof that we can avoid it?
>>>>>
>>>>> Second: this breaks the convention that routers are identified by
>>>>> link-local addresses: because the address options do not contain a
>>>>> scope,
>>>>> there is no way to use a link-local address in the next hop option, as
>>>>> it
>>>>> would be meaningless. Thus it must be assumed that the IP address in
>>>>> the
>>>>> next hop option must have global scope. But using global-scope
>>>>> addresses
>>>>> removes the ability we have today to do seamless renumbering of IPv6
>>>>> addresses using multiple prefixes.
>>>>
>>>> I suppose we could argue that each router on a link could be aware of
>>>> all other routers on the same link, and therefore could know the
>>>> appropriate link-local address. Or we could argue that each router
>>>> should only send Next Hop RAs that pertain to itself. But again, that
>>>> points to the fact that we need a general model before we finalise
>>>> specifics.
>>>>
>>>> If this was the only issue for seamless renumbering, I'd be a
>>>> happy man.
>>>>
>>>>> Third: the multiple-interface model is much more crude than that
>>>>> currently
>>>>> being proposed in the MIF working group. This draft should look at that
>>>>> architecture, particularly with regard to explicit provisioning domains
>>>>> and
>>>>> trust levels.
>>>>
>>>> I agree, although how PVDs will be reduced to code is still a bit
>>>> of a mystery to me. Once again: what's the general model for SADR?
>>>>
>>>> (For those in a mood for more brain punishment, see
>>>> http://tools.ietf.org/html/draft-shyam-site-multi . There are
>>>> many issues with that draft, but it also raises some
>>>> interesting points.)
>>>>
>>>>      Brian
>>>> ------------------------------------------------------------------------
>>>
>>> FWIW I suspect that we are heading towards a scenario where such
>>> multi-homed
>>> end systems are forced to take part in one or more routing protocols, and
>>> in
>>> a manner similar to an EIGRP stub router or a BGP multi-homed AS i.e. the
>>> multi-homed hosts establish neighbors with multiple upstream routers
>>> (possibly from multiple ASes), they speak the native routing protocol(s),
>>> they learn routes in the same way as fully-fledged routers (fate
>>> sharing),
>>> but they do not/ cannot acts as transit devices that forward traffic not
>>> destined to or sourced from themselves (loop and policy violation
>>> prevention).
>>>
>>
>>
>>> IMHO attempting to shoehorn this function into ICMP/ RA is not going to
>>> cut
>>> it.
>>>
>>
>> In the near field communication (NFC) scenario the multi-homed host is
>> routing packets for IP sensors that are embedded in the host.
>
> Hmmm. Do you assume that device partnered with the NFC interface speaks
> native IPv6? Or is this actually an ALG?
>
>> Also the
>> host may be routing packets from one interface to the other.
>> Sorry I don't understand your concern.
>
> If a device is forwarding IPv6 packets that are not sourced or destined to
> it's own interface address, then it's acting as a router.
>
> Quoting RFC2460
>
>    router      - a node that forwards IPv6 packets not explicitly addressed
> to itself.  [See Note below].
>
> Note: it is possible, though unusual, for a device with multiple
>    interfaces to be configured to forward non-self-destined packets
>    arriving from some set (fewer than all) of its interfaces, and to
>    discard non-self-destined packets arriving from its other interfaces.
>    Such a device must obey the protocol requirements for routers when
>    receiving packets from, and interacting with neighbors over, the
>    former (forwarding) interfaces.  It must obey the protocol
>    requirements for hosts when receiving packets from, and interacting
>    with neighbors over, the latter (non-forwarding) interfaces.
>
> Why would the device which is acting as a router listen to RA (when making
> any decision on forwarding packets)?
>
> Yes, I am aware of the (IMVHO poor) decision to use RA to communicate a
> default route to the WAN interface of 6204/7084 routers.
>
> That concept is not going to fly IMHO once you have more than one "WAN"
> interface.
>

In the draft, I am not saying anything from myself, I just quoted RFC
7157, so if you disagree then maybe 7157 needs to be changed.

> Unless you want to copy the stacking model of IPv4 where one router acts as
> a DHCPv4 server and the following as a DHCPv4 client + NAT.
>

IPv4 is out of scope in my draft.
As per Brian's suggestion I am working on a DHCPv6 document. In
connection with that solution an IPv4 version of the options can be of
defined.

> What do you do when the NFC device you are paired to is also
> multi-interface? [NFC phone pairs with another NFC equipped phone]
>

Maybe link layer solutions can be used but in any case, I believe such
issues are in scope of groups like 6lo WG.

 Regards,
Behcet
>>>
>>> --
>>> Regards,
>>> RayH
>
>
> --
> Regards,
> RayH
>


From nobody Wed Jun 11 11:20:49 2014
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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--=-=-=


Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> Note that host-based SADR is not the case in homenet, BTW; homenet
    >> takes
    >> care of SADR in the network.

    > Not, I think, if some hosts are MIFfed directly onto wireless
    > ISPs. That will happen, even if the homenet architecture doesn't
    > expect it.

Can you explain this situation in more detail?
Are you talking 3G/wifi in a smartphone, or something different?

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




--=-=-=
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--=-=-=--


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Date: Thu, 12 Jun 2014 14:07:47 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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On 12/06/2014 06:20, Michael Richardson wrote:
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     >> Note that host-based SADR is not the case in homenet, BTW; homenet
>     >> takes
>     >> care of SADR in the network.
> 
>     > Not, I think, if some hosts are MIFfed directly onto wireless
>     > ISPs. That will happen, even if the homenet architecture doesn't
>     > expect it.
> 
> Can you explain this situation in more detail?
> Are you talking 3G/wifi in a smartphone, or something different?

That would be one option, or a tablet of course. Another would
be whatever is standing in the corner where the TV is today - it
might turn out to have its own external connection, at least
for a vendor's call-home facility, over whatever replaces
the CATV cable. I just think that we must assume that the model
of one CE device as the only external point of connection
is not a future-proof assumption.

    Brian


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 12 Jun 2014 11:14:39 +0900
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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--90e6ba18221eca4c0604fb9a2019
Content-Type: text/plain; charset=UTF-8

On Wed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > Note that host-based SADR is not the case in homenet, BTW; homenet takes
>  > care of SADR in the network.
>
> Not, I think, if some hosts are MIFfed directly onto wireless
> ISPs. That will happen, even if the homenet architecture doesn't
> expect it.
>

All the more reason to ensure that each network the host is plugged into
provides a self-sufficient, internally-consistent, and complete view of the
network connectivity it provides, without attempting to draw conclusions or
provide information about any other networks the host might be plugged into.

--90e6ba18221eca4c0604fb9a2019
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On W=
ed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:brian.e.carpenter@gmail.com" target=3D"_blank">brian.e.carpente=
r@gmail.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 class=3D"HOEnZb"><div class=3D"h5"><spa=
n style=3D"color:rgb(34,34,34)">&gt; Note that host-based SADR is not the c=
ase in homenet, BTW; homenet takes</span><br>

</div></div><div class=3D"">
&gt; care of SADR in the network.<br>
<br>
</div>Not, I think, if some hosts are MIFfed directly onto wireless<br>
ISPs. That will happen, even if the homenet architecture doesn&#39;t<br>
expect it.<br></blockquote><div><br></div><div>All the more reason to ensur=
e that each network the host is plugged into provides a self-sufficient, in=
ternally-consistent, and complete view of the network connectivity it provi=
des, without attempting to draw conclusions or provide information about an=
y other networks the host might be plugged into.</div>

</div></div></div>

--90e6ba18221eca4c0604fb9a2019--


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On 11/06/2014 16:29, Lorenzo Colitti wrote:
> On Wed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>>> I don't see how any of these require giving up fate sharing. I do see how
>>> these constraints will cause things to break if you don't have fate
>> sharing.
>>
>> But what if the X', Y', P' rules come from another source, that
>> doesn't share fate with the source of the X, Y, P rules?
>>
> 
> Please provide an example.

The simplest is perhaps the neighbour's WiFi network drifting
across the garden fence, so you get both your own wired
and your neigbour's wireless prefix info. You could tell me
"don't do that" but people will do it, quite unintentionally.

We could of course agree to sacrifice fate-sharing in such a
case. An MPTCP or shim6 like approach that will use whatever
address pairs happen to work will take the sting out of the
failure cases.

    Brian


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To: Lorenzo Colitti <lorenzo@google.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On 12/06/2014 14:14, Lorenzo Colitti wrote:
> On Wed, Jun 11, 2014 at 1:16 PM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>>> Note that host-based SADR is not the case in homenet, BTW; homenet takes
>>  > care of SADR in the network.
>>
>> Not, I think, if some hosts are MIFfed directly onto wireless
>> ISPs. That will happen, even if the homenet architecture doesn't
>> expect it.
>>
> 
> All the more reason to ensure that each network the host is plugged into
> provides a self-sufficient, internally-consistent, and complete view of the
> network connectivity it provides, without attempting to draw conclusions or
> provide information about any other networks the host might be plugged into.

Agreed. I don't see the draft in question intending to violate
that model.

    Brian


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 12 Jun 2014 11:23:28 +0900
Message-ID: <CAKD1Yr1A3Kt2bcjJfXyou9cg0z2fOizSSLi5_ZQKVUd5sCedsg@mail.gmail.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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On Thu, Jun 12, 2014 at 11:18 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> >>> I don't see how any of these require giving up fate sharing. I do see
> how
> >>> these constraints will cause things to break if you don't have fate
> >> sharing.
> >>
> >> But what if the X', Y', P' rules come from another source, that
> >> doesn't share fate with the source of the X, Y, P rules?
> >>
> >
> > Please provide an example.
>
> The simplest is perhaps the neighbour's WiFi network drifting
> across the garden fence, so you get both your own wired
> and your neigbour's wireless prefix info. You could tell me
> "don't do that" but people will do it, quite unintentionally.
>

Can you clarify this further? Is your host simultaneously connected to both
wifi networks? Or are the two homenets merged together?


> We could of course agree to sacrifice fate-sharing in such a
> case. An MPTCP or shim6 like approach that will use whatever
> address pairs happen to work will take the sting out of the
> failure cases.
>

It's true that "always try every possible combination all the time" does
usually result in something that works (or, at least, is working when you
check it, though it may fail later). But typically we try to build
solutions that are more efficient than that.

--001a113601464ab03004fb9a4099
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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On T=
hu, Jun 12, 2014 at 11:18 AM, Brian E Carpenter <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:brian.e.carpenter@gmail.com" target=3D"_blank">brian.e.carpent=
er@gmail.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 class=3D"HOEnZb"><div class=3D"h5">&gt;=
&gt;&gt; I don&#39;t see how any of these require giving up fate sharing. I=
 do see how<br>


&gt;&gt;&gt; these constraints will cause things to break if you don&#39;t =
have fate<br>
&gt;&gt; sharing.<br>
&gt;&gt;<br>
&gt;&gt; But what if the X&#39;, Y&#39;, P&#39; rules come from another sou=
rce, that<br>
&gt;&gt; doesn&#39;t share fate with the source of the X, Y, P rules?<br>
&gt;&gt;<br>
&gt;<br>
&gt; Please provide an example.<br>
<br>
</div></div>The simplest is perhaps the neighbour&#39;s WiFi network drifti=
ng<br>
across the garden fence, so you get both your own wired<br>
and your neigbour&#39;s wireless prefix info. You could tell me<br>
&quot;don&#39;t do that&quot; but people will do it, quite unintentionally.=
<br></blockquote><div><br></div><div>Can you clarify this further? Is your =
host simultaneously connected to both wifi networks? Or are the two homenet=
s merged together?</div>

<div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">We could of course agree to=
 sacrifice fate-sharing in such a<br>
case. An MPTCP or shim6 like approach that will use whatever<br>
address pairs happen to work will take the sting out of the<br>
failure cases.<br></blockquote><div><br></div><div>It&#39;s true that &quot=
;always try every possible combination all the time&quot; does usually resu=
lt in something that works (or, at least, is working when you check it, tho=
ugh it may fail later). But typically we try to build solutions that are mo=
re efficient than that.</div>

</div></div></div>

--001a113601464ab03004fb9a4099--


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 12 Jun 2014 11:27:57 +0900
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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On Thu, Jun 12, 2014 at 11:21 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > All the more reason to ensure that each network the host is plugged into
> > provides a self-sufficient, internally-consistent, and complete view of
> the
> > network connectivity it provides, without attempting to draw conclusions
> or
> > provide information about any other networks the host might be plugged
> into.
>
> Agreed. I don't see the draft in question intending to violate
> that model.
>

But it does, because the "next hop address" option is not restricted to be
on the same link as the router that sends it. Therefore, this option can be
used by a router on network A to tell a host to use a next-hop on network
B, even though that router might know nothing at all about whether the host
is even connected to network B.

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On T=
hu, Jun 12, 2014 at 11:21 AM, Brian E Carpenter <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:brian.e.carpenter@gmail.com" target=3D"_blank">brian.e.carpent=
er@gmail.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><div>&gt; All the more reason to ensure=
 that each network the host is plugged into<br>
&gt; provides a self-sufficient, internally-consistent, and complete view o=
f the<br>
&gt; network connectivity it provides, without attempting to draw conclusio=
ns or<br>
&gt; provide information about any other networks the host might be plugged=
 into.<br>
<br>
</div></div>Agreed. I don&#39;t see the draft in question intending to viol=
ate<br>
that model.<br></blockquote><div><br></div><div>But it does, because the &q=
uot;next hop address&quot; option is not restricted to be on the same link =
as the router that sends it. Therefore, this option can be used by a router=
 on network A to tell a host to use a next-hop on network B, even though th=
at router might know nothing at all about whether the host is even connecte=
d to network B.</div>


</div></div></div>

--001a1134b40e47878c04fb9a50a0--


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On 12/06/2014 14:23, Lorenzo Colitti wrote:
> On Thu, Jun 12, 2014 at 11:18 AM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>>>>> I don't see how any of these require giving up fate sharing. I do see
>> how
>>>>> these constraints will cause things to break if you don't have fate
>>>> sharing.
>>>>
>>>> But what if the X', Y', P' rules come from another source, that
>>>> doesn't share fate with the source of the X, Y, P rules?
>>>>
>>> Please provide an example.
>> The simplest is perhaps the neighbour's WiFi network drifting
>> across the garden fence, so you get both your own wired
>> and your neigbour's wireless prefix info. You could tell me
>> "don't do that" but people will do it, quite unintentionally.
>>
> 
> Can you clarify this further? Is your host simultaneously connected to both
> wifi networks? Or are the two homenets merged together?

I've never seen an interface that was capable of joining two
Wi-Fi networks simultaneously, although I suppose you could always
plug in a second interface. But I was actually thinking of one wired
and one Wi-Fi.

And yes, I can also imagine a situation where routers in two
neighbouring homenets decided to establish adjacency due to
some accident with Wi-Fi configuration. Among several billion
pairs of neighbouring homenets, this is bound to happen at
some frequency, I think.

> 
>> We could of course agree to sacrifice fate-sharing in such a
>> case. An MPTCP or shim6 like approach that will use whatever
>> address pairs happen to work will take the sting out of the
>> failure cases.
>>
> 
> It's true that "always try every possible combination all the time" does
> usually result in something that works (or, at least, is working when you
> check it, though it may fail later). But typically we try to build
> solutions that are more efficient than that.

If we can, certainly. But perverse cases will arise sometimes,
and we'd prefer that they didn't generate help desk calls.

   Brian


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On 12/06/2014 14:27, Lorenzo Colitti wrote:
> On Thu, Jun 12, 2014 at 11:21 AM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>>> All the more reason to ensure that each network the host is plugged into
>>> provides a self-sufficient, internally-consistent, and complete view of
>> the
>>> network connectivity it provides, without attempting to draw conclusions
>> or
>>> provide information about any other networks the host might be plugged
>> into.
>>
>> Agreed. I don't see the draft in question intending to violate
>> that model.
>>
> 
> But it does, because the "next hop address" option is not restricted to be
> on the same link as the router that sends it. Therefore, this option can be
> used by a router on network A to tell a host to use a next-hop on network
> B, even though that router might know nothing at all about whether the host
> is even connected to network B.

Ah, I see the disconnect here. Yes, I was certainly assuming that
the entity sending the Next Hop options has full topological
knowledge.

    Brian


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 12 Jun 2014 12:04:52 +0900
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--90e6ba18221e4f3b6004fb9ad401
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On Thu, Jun 12, 2014 at 11:52 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> Ah, I see the disconnect here. Yes, I was certainly assuming that
>  the entity sending the Next Hop options has full topological
> knowledge.
>

I assert that assuming the existence of an entity that has full topoloical
knowledge (especially in a home network) is a fallacy that should
henceforth be known as the "god box fallacy".

--90e6ba18221e4f3b6004fb9ad401
Content-Type: text/html; charset=UTF-8

<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jun 12, 2014 at 11:52 AM, Brian E Carpenter <span dir="ltr">&lt;<a href="mailto:brian.e.carpenter@gmail.com" target="_blank">brian.e.carpenter@gmail.com</a>&gt;</span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><span style="color:rgb(34,34,34)">Ah, I see the disconnect here. Yes, I was certainly assuming that</span><br>


</div></div>
the entity sending the Next Hop options has full topological<br>
knowledge.<br></blockquote><div><br></div><div>I assert that assuming the existence of an entity that has full topoloical knowledge (especially in a home network) is a fallacy that should henceforth be known as the &quot;god box fallacy&quot;.</div>

</div>
</div></div>

--90e6ba18221e4f3b6004fb9ad401--


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Ralph Droms <rdroms.ietf@gmail.com>
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> On Jun 11, 2014, at 11:04 PM, Lorenzo Colitti <lorenzo@google.com> wrote:
>=20
>> On Thu, Jun 12, 2014 at 11:52 AM, Brian E Carpenter <brian.e.carpenter@gm=
ail.com> wrote:
>> Ah, I see the disconnect here. Yes, I was certainly assuming that
>> the entity sending the Next Hop options has full topological
>> knowledge.
>=20
> I assert that assuming the existence of an entity that has full topoloical=
 knowledge (especially in a home network) is a fallacy that should hencefort=
h be known as the "god box fallacy".
>=20

I thought that idea was known as "SDN"...

- Ralph



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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br></div><div><br>On Jun 11, 2014, at 11:04 PM, Lorenzo Colitti &lt;<a href="mailto:lorenzo@google.com">lorenzo@google.com</a>&gt; wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jun 12, 2014 at 11:52 AM, Brian E Carpenter <span dir="ltr">&lt;<a href="mailto:brian.e.carpenter@gmail.com" target="_blank">brian.e.carpenter@gmail.com</a>&gt;</span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><span style="color:rgb(34,34,34)">Ah, I see the disconnect here. Yes, I was certainly assuming that</span><br>


</div></div>
the entity sending the Next Hop options has full topological<br>
knowledge.<br></blockquote><div><br></div><div>I assert that assuming the existence of an entity that has full topoloical knowledge (especially in a home network) is a fallacy that should henceforth be known as the "god box fallacy".</div>

</div>
</div></div>
</div></blockquote><blockquote type="cite"><div><br></div></blockquote><br><div>I thought that idea was known as "SDN"...</div><div><br></div><div>- Ralph</div><div><br></div><div><br></div></body></html>
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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 12 Jun 2014 19:52:22 +0900
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On Thu, Jun 12, 2014 at 7:46 PM, Ralph Droms <rdroms.ietf@gmail.com> wrote:

> I assert that assuming the existence of an entity that has full topoloical
> knowledge (especially in a home network) is a fallacy that should
> henceforth be known as the "god box fallacy".
>
> I thought that idea was known as "SDN"...
>

Wake me up from cryogenic sleep when the first SDN home network is deployed
:-)

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<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jun 12, 2014 at 7:46 PM, Ralph Droms <span dir="ltr">&lt;<a href="mailto:rdroms.ietf@gmail.com" target="_blank">rdroms.ietf@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div><div class="h5"><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">

<div>I assert that assuming the existence of an entity that has full topoloical knowledge (especially in a home network) is a fallacy that should henceforth be known as the &quot;god box fallacy&quot;.</div></div></div></div>

</div></blockquote></div></div><div>I thought that idea was known as &quot;SDN&quot;...</div></div></blockquote><div><br></div><div>Wake me up from cryogenic sleep when the first SDN home network is deployed :-)</div></div>

</div></div>

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Le 12/06/2014 04:48, Brian E Carpenter a écrit :
> On 12/06/2014 14:23, Lorenzo Colitti wrote:
>> On Thu, Jun 12, 2014 at 11:18 AM, Brian E Carpenter <
>> brian.e.carpenter@gmail.com> wrote:
>>
>>>>>> I don't see how any of these require giving up fate
>>>>>> sharing. I do see
>>> how
>>>>>> these constraints will cause things to break if you don't
>>>>>> have fate
>>>>> sharing.
>>>>>
>>>>> But what if the X', Y', P' rules come from another source,
>>>>> that doesn't share fate with the source of the X, Y, P
>>>>> rules?
>>>>>
>>>> Please provide an example.
>>> The simplest is perhaps the neighbour's WiFi network drifting
>>> across the garden fence, so you get both your own wired and your
>>> neigbour's wireless prefix info. You could tell me "don't do
>>> that" but people will do it, quite unintentionally.
>>>
>>
>> Can you clarify this further? Is your host simultaneously connected
>> to both wifi networks? Or are the two homenets merged together?
>
> I've never seen an interface that was capable of joining two Wi-Fi
> networks simultaneously,

Right, that is the case with most WiFi interfaces: each can join one
ESSID not more.

As an addition, there exist some slight variations which may make think
of an interface joining several ESSIDs: 802.11p and 802.11ac.

In 802.11p there is no ESSID so an interface may be interpreted
to join all ('*') networks.

In 802.11ac an interface joins two channels: one in the 2.4GHz and the
other in the 5.4GHz range, to offer an aggregated 1Gbps bandwidth.

Depending on implementation, an 802.11ac card may join the 2.4GHz
channel of one ESSID and the 5.4GHz channel of another.

> although I suppose you could always plug in a second interface.

Right, and that is typically the case with 'boxes' deployed in vehicles 
such as automobiles.  They carry at least 2 WiFi interfaces - one for 
the external WiFi hotspot and one to offer hotspot to passengers (the 
vehicle's frame is usually a very strong attenuator in this power ranges).

> But I
> was actually thinking of one wired and one Wi-Fi.
>
> And yes, I can also imagine a situation where routers in two
> neighbouring homenets decided to establish adjacency due to some
> accident with Wi-Fi configuration. Among several billion pairs of
> neighbouring homenets, this is bound to happen at some frequency, I
> think.

I agree.  And it may happen not only on these boxes WiFi interfaces but 
also on their femto-cell interfaces.

Alex

>
>>
>>> We could of course agree to sacrifice fate-sharing in such a
>>> case. An MPTCP or shim6 like approach that will use whatever
>>> address pairs happen to work will take the sting out of the
>>> failure cases.
>>>
>>
>> It's true that "always try every possible combination all the time"
>> does usually result in something that works (or, at least, is
>> working when you check it, though it may fail later). But typically
>> we try to build solutions that are more efficient than that.
>
> If we can, certainly. But perverse cases will arise sometimes, and
> we'd prefer that they didn't generate help desk calls.
>
> Brian
>
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list ipv6@ietf.org Administrative
> Requests: https://www.ietf.org/mailman/listinfo/ipv6
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>



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From: Ray Hunter <v6ops@globis.net>
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> Lorenzo Colitti <mailto:lorenzo@google.com>
> 12 June 2014 05:04
>
>     Ah, I see the disconnect here. Yes, I was certainly assuming that
>     the entity sending the Next Hop options has full topological
>     knowledge.
>
>
> I assert that assuming the existence of an entity that has full 
> topoloical knowledge (especially in a home network) is a fallacy that 
> should henceforth be known as the "god box fallacy".
>
Absolutely agree. In these days of "bring your own device" that's 
rapidly becoming equivalent to "bring your own router".


-- 
Regards,
RayH


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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 IPv6 Maintenance Working Group of the IETF.

        Title           : IPv6 Multicast Address Scopes
        Author          : Ralph Droms
	Filename        : draft-ietf-6man-multicast-scopes-07.txt
	Pages           : 7
	Date            : 2014-06-12

Abstract:
   This document updates the definitions of IPv6 multicast scopes.  This
   document updates RFC 4007 and RFC 4291


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-multicast-scopes/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-6man-multicast-scopes-07

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-6man-multicast-scopes-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 Thu Jun 12 14:33:27 2014
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Greetings,

Here are some things that I perceive as issues with this draft, 
along with suggestions for how to fix them.

First: not all devices that process IPv6 header header chains to 
enforce policies match (or even care about) the content of IPv6 
extension headers; all they want to to is to traverse the header 
chain to find the upper-layer header.  Examples are RA-Guard 
(http://tools.ietf.org/html/rfc7113)  and DHCPv6-Shield 
(http://tools.ietf.org/html/draft-ietf-opsec-dhcpv6-shield).  For 
those functions extension headers do not matter so long as the 
transport header can be found and inspected; the implementation 
advice for the RA-Guard and DHCPv6-Shield filters is to pass 
everything that can be positively identified as NOT being a 
forbidden RA message or DHCPv6 message.

For that reason, I would recommend the following global changes:

<CURRENT TEXT>
intermediate devices that enforce policies by matching on IPv6 EHs (ACLs, stateful inspection and firewalling)
</CURRENT TEXT>

<PROPOSED TEXT>
intermediate devices that process IPv6 header chains in order to enforce policies
</PROPOSED TEXT>

<CURRENT TEXT>
an intermediate device that enforces policies by matching on IPv6 EHs (ACLs, stateful inspection and firewalling)
</CURRENT TEXT>

<PROPOSED TEXT>
an intermediate device that processed IPv6 header chains in order to enforce policies
</PROPOSED TEXT>


Now for some specific issues.

<CURRENT TEXT>
   Guideline 4: According to Section 4.1 of [RFC2460], when a end-host
   processes a IPv6 packet with multiple DestOpt EHs,

   o  if there is no RH EH in the packet, then only the final
      destination host SHOULD process only the last DestOpt EH.

   o  if there is a RH in the packet

      *  if the node is the final destination, then it SHOULD process
         all the DestOpt EHs in the packet.

      *  if the node is one of the destinations in the RH, it SHOULD
         only process the DestOpt EHs in the chain that are before the
         RH EH.
</CURRENT TEXT>

It would seem that these rules should apply to end systems or to 
intermediate systems that do not enforce policies, but that's not quite 
what is said.  Also, I think that the first bullet is simply wrong.  
The relevant note in RFC 2460 says:

           note 1: for options to be processed by the first destination
                   that appears in the IPv6 Destination Address field
                   plus subsequent destinations listed in the Routing
                   header.

so the final destination end system should process ALL of the DestOPt 
EHs in the packet.  Here is proposed replacement text:

<PROPOSED TEXT>
   Guideline 4: As specified in Section 4.1 of [RFC2460], when a end-host
   or an intermediate system that does not inspect IPv6 header chains in
   order to enforce policies processes an IPv6 packet with multiple DestOpt
   EHs,

   o  if there is no RH EH in the packet, then the final
      destination host alone SHOULD process all the DestOpt EHs
      in the packet.

   o  if there is a RH in the packet

      *  if the node is the final destination, then it SHOULD process
         all the DestOpt EHs in the packet.

      *  if the node is one of the destinations in the RH, it SHOULD
         only process the DestOpt EHs in the chain that are before the
         RH EH.
</PROPOSED TEXT>


Given the impossibility of distinguishing between an unknown 
extension header and an unknown upper-layer protocol, I believe that 
the following text is problematic:

<CURRENT TEXT>
5.  Other guidelines

   Guideline 7: Unknown Eh

   o  As defined in Section 4 of [RFC2460], end-hosts should discard
      packets with unknown EH types and send an ICMP Parameter Problem
      message to the source of the packet.

   o  Intermediate devices that enforce policies (ACLs, stateful
      inspection and firewalling) by matching on IPv6 EHs MUST only drop
      unknown EH as part of configuration policy (Section 2.1 of
      [RFC7045]).
</CURRENT TEXT>

Here is the proposed replacement, which would require adding a 
reference to RFC 6564:

<PROPOSED TEXT>
5.  Other guidelines

   Since IPv6 Extension Headers and upper-layer protocols share the same
   namespace (the "Assigned Internet Protocol Numbers" registry/namespace),
   it is impossible to  tell whether an unrecognized Next Header value refers
   to an IPv6 Extension Header to to an unrecognized upper-layer protocol,
   [RFC6564] notwithstanding.  Thus, when parsing an IPv6 header chain:

   Guideline 7: Unecognized Next Header values

   o  As specified in Section 4 of [RFC2460], end-hosts should discard packets
      with unrecognized Next Header values and send an ICMP Parameter Problem
      message to the source of the packet, with an ICMP Code value of 1
      ("unrecognized Next Header type encountered") and the ICMP Pointer field
      containing the offset of the unrecognized value within the original packet.

   o  Intermediate devices that process IPv6 header chains in order to enforce
      policies MUST NOT attempt to continue parsing an IPv6 header chain after
      encountering an unrecognized Next Header value.  Per Section 2.1 of [RFC7045],
      such systems MUST be configurable to allow such packets, but the default
      configuration MAY drop such packets.
</PROPOSED TEXT>


And finally I recommend changing

<CURRENT TEXT>
   Guideline 8: Intermediate or end-hosts MUST process a RH in an IPv6
   packet only when the host's address is the same as the packet's IPv6
   Destination Address.  (Section 4.4 of [RFC2460])
</CURRENT TEXT>

to

<PROPOSED TEXT>
   Guideline 8: End-hosts or intermediate systems that do not process
   IPv6 header chains in order to enforce policies MUST process an RH
   in an IPv6 packet only when the node's address is the same as the
   packet's IPv6 Destination Address.  (Section 4.4 of [RFC2460])
</PROPOSED TEXT>


I agree with Brian Carpenter that the implementation advice in this 
draft is needed.  I would like to believe that with the changes 
proposed above (or something similar to them) it could subsume 
implementation guide aspects of Fernando Gont's recent draft 
http://tools.ietf.org/html/draft-gont-6man-ipv6-universal-extension-header, 
and I freely confess to stealing some of Fernando's excellent text.

Thanks and regards,

Mike Heard


On Mon, 9 Jun 2014, Panos Kampanakis (pkampana) wrote:
> Thank you Brian.
> 
> I will certainly address all these along with your previous MUST 
> NOT comment in the next iteration.
> 
> As for BCP, I think it could be either Informational or BCP. I 
> don't feel strongly about it. I will defer to the chairs and the 
> rest of the group, if this doc ends up being adopted and a WG 
> item. We can certainly change it.
> 
> Panos
> 
> 
> -----Original Message-----
> From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com] 
> Sent: Sunday, June 08, 2014 1:04 AM
> To: Panos Kampanakis (pkampana)
> Cc: 6man@ietf.org
> Subject: Re: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> 
> Panos,
> 
> I think this draft fills a gap. In fact I wonder whether it shouldn't
> be a BCP, so that it gets anough attention.
> 
> I do have a few comments, and I hope that some real implementors
> can have a look too.
> 
> > 1.  Introduction
> ...
> >    [RFC2460]
> >    describes some IPv6 EH recommendations of the order and allowed
> >    occurrences of headers, but it does not provide other guidance on how
> >    EHs should be parsed. 
> 
> I apologise for plugging my own RFC, but I think it's important to insert
> something like this:
> 
>  [RFC7045] updates RFC 2460 by specifying the required behavior of
>  middleboxes when handing an EH chain, but it does not go into detail
>  about the parsing process.
> 
> (The reason is that we really need all those middlebox implementors to
> look at the IETF's latest thinking on this. There is a lot of code
> out there based on careless reading of RFC 2460.)
> 
> >  Guideline 2: From Section 5 of [RFC7112], when parsing an EH chain,
> 
> That reads as if you are quoting RFC 7112, but you are not. Is this
> what you mean?:
> 
>  Guideline 2: As a consequence of Section 5 of [RFC7112], when parsing an EH chain,
> 
> Then you have this phrase twice:
> 
> > field is not an Upper Layer (UL) protocol (i.e.  TCP) 
> 
> I hope you mean "(e.g. TCP)" because this would apply to any
> protocol, not just TCP.
> 
> Also, you could add a note that the current list of defined EH values
> is maintained by IANA in the "IPv6 Extension Header Types" registry
> created by RFC 7045. This registry is intended precisely as a
> convenient reference for implementors.
> 
> > Guideline 3: Thus, when parsing an EH chain,
> ...
> > o  an intermediate device that enforces policies (ACLs, stateful
> >    inspection and firewalling) by matching on IPv6 EHs MUST discard
> >    packets that have an HbH EH that is not first in the chain
> >    (Section 2.2 of [RFC7045]).  If the device is not parsing the EH
> >    chain, it MAY NOT discard the packets.
> 
> I've already mentioned in private mail that this needs to be MUST NOT.
> However, a picky implementor will want to know how a device that is
> not parsing the header chain will even know that there is a HbH EH
> that is not first.
> 
> > 4.  Parsing malformed EHs
> ...
> >    If the data of the last EH or the UL
> >    Header plus its data does not align with the original IPv6 Header
> >    Payload Length the packet MUST be dropped unless another policy step
> >    already discarded it.
> 
> I think this is inconsistent with a statement in RFC 2460:
> 
> > 4.7 No Next Header
> > 
> >    The value 59 in the Next Header field of an IPv6 header or any
> >    extension header indicates that there is nothing following that
> >    header.  If the Payload Length field of the IPv6 header indicates the
> >    presence of octets past the end of a header whose Next Header field
> >    contains 59, those octets must be ignored, and passed on unchanged if
> >    the packet is forwarded.
> 
> Unless I have misunderstood something, your guideline 5 needs
> an exception for the No Next Header case.
> 
> (Or we could decide that the case described in RFC 2460 is an
> invitation to buffer overflow attacks, and change the rule.)
> 
> Regards
>    Brian
> 
> On 03/06/2014 05:36, Panos Kampanakis (pkampana) wrote:
> > Hello,
> > 
> > I just submitted an Informational draft that provides guidelines for IPv6 implementers on how to parse IPv6 extension headers.
> > 
> > There are multiple RFCs like RFC2460, RFC7112, RFC7045, RFC5722 and RFC6946 already that provide some rules on IPv6 packet processing. These address separate issues and is tough for an implementer to track all rules in each RFC. Additionally, there are some gaps in parsing malformed EHs and how EH chains should be parsed. To my knowledge, there is no document that and implementer could use as a single source of truth that would tell him how IPv6 EH should be parsed. That has led to different implementations that are inconsistent. For example malformed packets are in some cases processed and others dropped based on vendor implementation.
> > 
> > As more and more smart devices are starting to participate in the network, there is a need for a document that will ensure there is consistency on how IPv6 EHs are processed to prevent inconsistencies and potential security implications from incorrectly parsing headers. This document is trying to address that need.
> > 
> > Name:		draft-kampanakis-6man-ipv6-eh-parsing
> > Revision:	00
> > Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> > Document date:	2014-06-02
> > Group:		Individual Submission
> > Pages:		8
> > URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6man-ipv6-eh-parsing-00.txt 
> > Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-ipv6-eh-parsing 
> > Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-eh-parsing-00 
> > 
> > 
> > Thoughts on the doc being adopted as WG item and other feedback is welcome.
> > 
> > Panos
> > Cisco Systems
> > 
> > 
> > 
> > 
> > -----Original Message-----
> > From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
> > Sent: Monday, June 02, 2014 1:08 PM
> > To: Panos Kampanakis (pkampana); Panos Kampanakis (pkampana)
> > Subject: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> > 
> > 
> > A new version of I-D, draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> > has been successfully submitted by Panos Kampanakis and posted to the IETF repository.
> > 
> > Name:		draft-kampanakis-6man-ipv6-eh-parsing
> > Revision:	00
> > Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> > Document date:	2014-06-02
> > Group:		Individual Submission
> > Pages:		8
> > URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> > Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-ipv6-eh-parsing/
> > Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-eh-parsing-00
> > 
> > 
> > Abstract:
> >    IPv6 is widely used on the internet today and is expected to be
> >    deployed more as more devices (i.e. home automation) get inter-
> >    connected.  The IPv6 header format allows for the use of Extension
> >    Headers (EH).  EHs could be chained together with very few existing
> >    guidelines by the IPv6 protocol on how devices should parse them,
> >    which open room for security concerns and inconsistencies.  This
> >    document presents guidelines for parsing IPv6 EHs with a goal of
> >    providing a common and consistent parsing methodology for IPv6
> >    implementers among the industry.
> > 
> >                                                                                   
> > 
> > 
> > Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.
> > 
> > The IETF Secretariat
> > 
> > --------------------------------------------------------------------
> > IETF IPv6 working group mailing list
> > ipv6@ietf.org
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Date: Fri, 13 Jun 2014 16:39:35 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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To: Ray Hunter <v6ops@globis.net>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On 13/06/2014 08:09, Ray Hunter wrote:
>> Lorenzo Colitti <mailto:lorenzo@google.com>
>> 12 June 2014 05:04
>>
>>     Ah, I see the disconnect here. Yes, I was certainly assuming that
>>     the entity sending the Next Hop options has full topological
>>     knowledge.
>>
>>
>> I assert that assuming the existence of an entity that has full
>> topoloical knowledge (especially in a home network) is a fallacy that
>> should henceforth be known as the "god box fallacy".
>>
> Absolutely agree. In these days of "bring your own device" that's
> rapidly becoming equivalent to "bring your own router".

(This takes us right back to today's mailstorm on homenet.)

Link-state and distance-vector routing protocols are both based
on graph theory algorithms that *assume* perfect knowledge of
the topology. That is a bit strange, since initially routers have
almost zero knowledge of the topology, but the reality is that by
the time one of these routing protocols converges, the distributed
algorithm has discovered the topology in order to execute itself.
So Lorenzo's god box is distributed across all the nodes participating
in the routing protocol.

Logically, the whole problem does solve itself if all multi-addressed
hosts also run the routing protocol. I'm beginning to wonder if
that isn't actually a lower cost solution than the alternatives.

    Brian


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Fri, 13 Jun 2014 14:01:25 +0900
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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On Fri, Jun 13, 2014 at 1:39 PM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> Link-state and distance-vector routing protocols are both based
>  on graph theory algorithms that *assume* perfect knowledge of
> the topology. That is a bit strange, since initially routers have
> almost zero knowledge of the topology, but the reality is that by
> the time one of these routing protocols converges, the distributed
> algorithm has discovered the topology in order to execute itself.
> So Lorenzo's god box is distributed across all the nodes participating
> in the routing protocol.
>

Right, and that's fine.

I have no issues with an entity that has limited topological knowledge
presenting that limited knowledge to the hosts as authoritative. For
example: a router sending a host a route announcement for a prefix it knows
it can reach, and potentially annotating said route announcement with "you
must use this source prefix to reach this prefix through me" information,
if it has it (e.g., if it got a PD for the source prefix).

I have no issues with an entity that has "full" topological knowledge (for
some value of "full") presenting that knowledge to the hosts as
authoritative. For example: router participating in homenet giving
information on the homenet - if homenet runs a distributed routing
protocol, once the protocol has converged, then all nodes have "full"
knowledge.

I strongly oppose having an entity with limited topological knowledge
telling the hosts things it does not have knowledge about. For example, the
homenet router in the previous paragraph making assertions about the a 4G
network the host might be connected to, or a 4G network making assertions
about a wifi network the host might be connected to.

Logically, the whole problem does solve itself if all multi-addressed
> hosts also run the routing protocol. I'm beginning to wonder if
> that isn't actually a lower cost solution than the alternatives.
>

It will be a long time before we get there.

What sort of problem are we trying to solve? If it's just a question of
"this route is not likely to work from this source address", the host
doesn't need a routing protocol. It just needs a way to have that hint
communicated to it in a timely manner.

--001a1134cb1206125804fbb09377
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On F=
ri, Jun 13, 2014 at 1:39 PM, Brian E Carpenter <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:brian.e.carpenter@gmail.com" target=3D"_blank">brian.e.carpente=
r@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"><div class=3D""><div class=3D"h5"><span style=3D"color:rgb=
(34,34,34)">Link-state and distance-vector routing protocols are both based=
</span><br>

</div></div>
on graph theory algorithms that *assume* perfect knowledge of<br>
the topology. That is a bit strange, since initially routers have<br>
almost zero knowledge of the topology, but the reality is that by<br>
the time one of these routing protocols converges, the distributed<br>
algorithm has discovered the topology in order to execute itself.<br>
So Lorenzo&#39;s god box is distributed across all the nodes participating<=
br>
in the routing protocol.<br></blockquote><div><br></div><div>Right, and tha=
t&#39;s fine.</div><div><br></div><div><div>I have no issues with an entity=
 that has limited topological knowledge presenting that limited knowledge t=
o the hosts as authoritative. For example: a router sending a host a route =
announcement for a prefix it knows it can reach, and potentially annotating=
 said route announcement with &quot;you must use this source prefix to reac=
h this prefix through me&quot; information, if it has it (e.g., if it got a=
 PD for the source prefix).</div>

</div><div><br></div><div>I have no issues with an entity that has &quot;fu=
ll&quot; topological knowledge (for some value of &quot;full&quot;) present=
ing that knowledge to the hosts as authoritative. For example: router parti=
cipating in homenet giving information on the homenet - if homenet runs a d=
istributed routing protocol, once the protocol has converged, then all node=
s have &quot;full&quot; knowledge.</div>

<div><br></div><div>I strongly oppose having an entity with limited topolog=
ical knowledge telling the hosts things it does not have knowledge about. F=
or example, the homenet router in the previous paragraph making assertions =
about the a 4G network the host might be connected to, or a 4G network maki=
ng assertions about a wifi network the host might be connected to.</div>

<div><br></div><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">Logically, the whole problem does solve its=
elf if all multi-addressed<br>


hosts also run the routing protocol. I&#39;m beginning to wonder if<br>
that isn&#39;t actually a lower cost solution than the alternatives.<br></b=
lockquote><div><br></div><div>It will be a long time before we get there.</=
div><div><br></div><div>What sort of problem are we trying to solve? If it&=
#39;s just a question of &quot;this route is not likely to work from this s=
ource address&quot;, the host doesn&#39;t need a routing protocol. It just =
needs a way to have that hint communicated to it in a timely manner.=C2=A0<=
/div>

</div></div></div>

--001a1134cb1206125804fbb09377--


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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Brian,

> Logically, the whole problem does solve itself if all multi-addressed
> hosts also run the routing protocol. I'm beginning to wonder if
> that isn't actually a lower cost solution than the alternatives.

Topology #1:

CER A    CER B
   |               |
   --------------
           |
        host

Topology #2:

CER A    CER B
   |               |
   --------------
           |
       router
           |
        host

Topology #3:

CER A ----|
                 |----  host ---- CER B
CER B ----|


what do you mean by the "whole problem"?
I assume we are talking about multi-prefix multihoming, in my mind that =
is where a host has a single interface with multiple addresses (from =
different /64s). each address is essentially connected to different exit =
circuits, and it is the responsibility of the host to "multi-home".=20

topology #1 and #2 (which can be an arbitrary topology) is MHMP. =
Topology #1 is solved by rule 5.5 in RFC6724 (prefer the next-hop router =
that I learnt the source address from). Topology #2 is solved by SADR in =
the network.

all of them put quite a lot of requirements on the host/application:
 - probing for working SA/DA pairs on connection
 - load sharing across circuits
 - failover to different SA/DA pair on failure
 - take local host policy into consideration, e.g. prefer WIFI over 4G =
for cost reasons, rather than purely using the link with
   best latency / bandwidth
 - take connected network policy into consideration, e.g. only use =
source addresses from ISP A, when ISP B fails (cause that's my=20
   expensive backup link.)

would any of this be easier if the host had full routing information =
available? a full BGP feed from each ISP on each interface? I just can't =
see that, I need sub-second failover, BGP provides sub hour convergence. =
even participating in SADR doesn't really give the host very much, SADR =
only helps reaching the right exits in the local network. the routers do =
that for the host already. and yes in an arbitrary topology routers must =
use a routing protocol for that.

topology #3 which is what in my reading this draft focuses on. it =
appears to proposed that a multi-homed host (that is, with multiple =
interfaces) should trust a message from a router on one interface to =
install a route to a different router on another interface. that seems =
like a big departure from how routing generally works. and it makes a =
big assumption about how the host is connected to the network. it also =
seems like quite a far fetched use case. I'll connect to a WIFI link, to =
receive a default route that should point out the 4G interface?

as far as I'm concerned the problem of MHMP is solved, with SADR in the =
network and rule 5.5 in the host directly connected to do independent =
CERs. and while the local network can give some indication on failure, =
the network is largely unaware of the end to end connection, and I don't =
see any other option than that the host probes. isn't that what =
essentially shim6 does to? the use of MP-TCP would of course help a lot. =
what problem do you see as unsolved here?

what is lacking though, is how hosts / applications deal with =
multi-homing. I run MPMH at home and I have still not found any IP stack =
/ application that handles that well. name based sockets seemed quite =
promising, anyone continuing work on that?

cheers,
Ole

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From nobody Fri Jun 13 12:04:47 2014
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From: The IESG <iesg-secretary@ietf.org>
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Subject: Protocol Action: 'IPv6 Multicast Address Scopes' to Proposed Standard (draft-ietf-6man-multicast-scopes-07.txt)
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The IESG has approved the following document:
- 'IPv6 Multicast Address Scopes'
  (draft-ietf-6man-multicast-scopes-07.txt) as Proposed Standard

This document is the product of the IPv6 Maintenance Working Group.

The IESG contact persons are Brian Haberman and Ted Lemon.

A URL of this Internet Draft is:
http://datatracker.ietf.org/doc/draft-ietf-6man-multicast-scopes/





Technical Summary

  This document updates the definitions of IPv6 multicast scopes. As
  defined in RFC4291 (RFC4007)

Working Group Summary

  Nothing to note.

Document Quality

  The ZigBee-IP spec uses multicast with scope 0x03 in a couple of
  ways and there are several independent interoperating
  implementations of ZigBee-IP.

  The 6man working group appoints reviewers for all documents being
  advanced to the IESG. This document has been reviewed in detail by
  Jouni Korhonen. In addition to the chair's and shepherd's review.

Personnel

  Document Shepherd: Ole Troan
  Responsible Area Director: Brian Haberman


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From: "Panos Kampanakis (pkampana)" <pkampana@cisco.com>
To: "C. M. Heard" <heard@pobox.com>
Subject: RE: New Version Notification for draft-kampanakis-6man-ipv6-eh-parsing-00.txt
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Thank you Mike for the detailed response. Very valuable feedback.=20
I will make sure to address it in the next iteration if the document become=
s an WG item.
Panos




-----Original Message-----
From: C. M. Heard [mailto:heard@pobox.com]=20
Sent: Thursday, June 12, 2014 5:33 PM
To: Panos Kampanakis (pkampana)
Cc: Brian E Carpenter; 6man
Subject: RE: New Version Notification for draft-kampanakis-6man-ipv6-eh-par=
sing-00.txt

Greetings,

Here are some things that I perceive as issues with this draft, along with =
suggestions for how to fix them.

First: not all devices that process IPv6 header header chains to enforce po=
licies match (or even care about) the content of IPv6 extension headers; al=
l they want to to is to traverse the header chain to find the upper-layer h=
eader.  Examples are RA-Guard
(http://tools.ietf.org/html/rfc7113)  and DHCPv6-Shield (http://tools.ietf.=
org/html/draft-ietf-opsec-dhcpv6-shield).  For those functions extension he=
aders do not matter so long as the transport header can be found and inspec=
ted; the implementation advice for the RA-Guard and DHCPv6-Shield filters i=
s to pass everything that can be positively identified as NOT being a forbi=
dden RA message or DHCPv6 message.

For that reason, I would recommend the following global changes:

<CURRENT TEXT>
intermediate devices that enforce policies by matching on IPv6 EHs (ACLs, s=
tateful inspection and firewalling) </CURRENT TEXT>

<PROPOSED TEXT>
intermediate devices that process IPv6 header chains in order to enforce po=
licies </PROPOSED TEXT>

<CURRENT TEXT>
an intermediate device that enforces policies by matching on IPv6 EHs (ACLs=
, stateful inspection and firewalling) </CURRENT TEXT>

<PROPOSED TEXT>
an intermediate device that processed IPv6 header chains in order to enforc=
e policies </PROPOSED TEXT>


Now for some specific issues.

<CURRENT TEXT>
   Guideline 4: According to Section 4.1 of [RFC2460], when a end-host
   processes a IPv6 packet with multiple DestOpt EHs,

   o  if there is no RH EH in the packet, then only the final
      destination host SHOULD process only the last DestOpt EH.

   o  if there is a RH in the packet

      *  if the node is the final destination, then it SHOULD process
         all the DestOpt EHs in the packet.

      *  if the node is one of the destinations in the RH, it SHOULD
         only process the DestOpt EHs in the chain that are before the
         RH EH.
</CURRENT TEXT>

It would seem that these rules should apply to end systems or to intermedia=
te systems that do not enforce policies, but that's not quite what is said.=
  Also, I think that the first bullet is simply wrong. =20
The relevant note in RFC 2460 says:

           note 1: for options to be processed by the first destination
                   that appears in the IPv6 Destination Address field
                   plus subsequent destinations listed in the Routing
                   header.

so the final destination end system should process ALL of the DestOPt EHs i=
n the packet.  Here is proposed replacement text:

<PROPOSED TEXT>
   Guideline 4: As specified in Section 4.1 of [RFC2460], when a end-host
   or an intermediate system that does not inspect IPv6 header chains in
   order to enforce policies processes an IPv6 packet with multiple DestOpt
   EHs,

   o  if there is no RH EH in the packet, then the final
      destination host alone SHOULD process all the DestOpt EHs
      in the packet.

   o  if there is a RH in the packet

      *  if the node is the final destination, then it SHOULD process
         all the DestOpt EHs in the packet.

      *  if the node is one of the destinations in the RH, it SHOULD
         only process the DestOpt EHs in the chain that are before the
         RH EH.
</PROPOSED TEXT>


Given the impossibility of distinguishing between an unknown extension head=
er and an unknown upper-layer protocol, I believe that the following text i=
s problematic:

<CURRENT TEXT>
5.  Other guidelines

   Guideline 7: Unknown Eh

   o  As defined in Section 4 of [RFC2460], end-hosts should discard
      packets with unknown EH types and send an ICMP Parameter Problem
      message to the source of the packet.

   o  Intermediate devices that enforce policies (ACLs, stateful
      inspection and firewalling) by matching on IPv6 EHs MUST only drop
      unknown EH as part of configuration policy (Section 2.1 of
      [RFC7045]).
</CURRENT TEXT>

Here is the proposed replacement, which would require adding a reference to=
 RFC 6564:

<PROPOSED TEXT>
5.  Other guidelines

   Since IPv6 Extension Headers and upper-layer protocols share the same
   namespace (the "Assigned Internet Protocol Numbers" registry/namespace),
   it is impossible to  tell whether an unrecognized Next Header value refe=
rs
   to an IPv6 Extension Header to to an unrecognized upper-layer protocol,
   [RFC6564] notwithstanding.  Thus, when parsing an IPv6 header chain:

   Guideline 7: Unecognized Next Header values

   o  As specified in Section 4 of [RFC2460], end-hosts should discard pack=
ets
      with unrecognized Next Header values and send an ICMP Parameter Probl=
em
      message to the source of the packet, with an ICMP Code value of 1
      ("unrecognized Next Header type encountered") and the ICMP Pointer fi=
eld
      containing the offset of the unrecognized value within the original p=
acket.

   o  Intermediate devices that process IPv6 header chains in order to enfo=
rce
      policies MUST NOT attempt to continue parsing an IPv6 header chain af=
ter
      encountering an unrecognized Next Header value.  Per Section 2.1 of [=
RFC7045],
      such systems MUST be configurable to allow such packets, but the defa=
ult
      configuration MAY drop such packets.
</PROPOSED TEXT>


And finally I recommend changing

<CURRENT TEXT>
   Guideline 8: Intermediate or end-hosts MUST process a RH in an IPv6
   packet only when the host's address is the same as the packet's IPv6
   Destination Address.  (Section 4.4 of [RFC2460]) </CURRENT TEXT>

to

<PROPOSED TEXT>
   Guideline 8: End-hosts or intermediate systems that do not process
   IPv6 header chains in order to enforce policies MUST process an RH
   in an IPv6 packet only when the node's address is the same as the
   packet's IPv6 Destination Address.  (Section 4.4 of [RFC2460]) </PROPOSE=
D TEXT>


I agree with Brian Carpenter that the implementation advice in this draft i=
s needed.  I would like to believe that with the changes proposed above (or=
 something similar to them) it could subsume implementation guide aspects o=
f Fernando Gont's recent draft http://tools.ietf.org/html/draft-gont-6man-i=
pv6-universal-extension-header,
and I freely confess to stealing some of Fernando's excellent text.

Thanks and regards,

Mike Heard


On Mon, 9 Jun 2014, Panos Kampanakis (pkampana) wrote:
> Thank you Brian.
>=20
> I will certainly address all these along with your previous MUST NOT=20
> comment in the next iteration.
>=20
> As for BCP, I think it could be either Informational or BCP. I don't=20
> feel strongly about it. I will defer to the chairs and the rest of the=20
> group, if this doc ends up being adopted and a WG item. We can=20
> certainly change it.
>=20
> Panos
>=20
>=20
> -----Original Message-----
> From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com]
> Sent: Sunday, June 08, 2014 1:04 AM
> To: Panos Kampanakis (pkampana)
> Cc: 6man@ietf.org
> Subject: Re: New Version Notification for=20
> draft-kampanakis-6man-ipv6-eh-parsing-00.txt
>=20
> Panos,
>=20
> I think this draft fills a gap. In fact I wonder whether it shouldn't=20
> be a BCP, so that it gets anough attention.
>=20
> I do have a few comments, and I hope that some real implementors can=20
> have a look too.
>=20
> > 1.  Introduction
> ...
> >    [RFC2460]
> >    describes some IPv6 EH recommendations of the order and allowed
> >    occurrences of headers, but it does not provide other guidance on ho=
w
> >    EHs should be parsed.=20
>=20
> I apologise for plugging my own RFC, but I think it's important to=20
> insert something like this:
>=20
>  [RFC7045] updates RFC 2460 by specifying the required behavior of =20
> middleboxes when handing an EH chain, but it does not go into detail =20
> about the parsing process.
>=20
> (The reason is that we really need all those middlebox implementors to=20
> look at the IETF's latest thinking on this. There is a lot of code out=20
> there based on careless reading of RFC 2460.)
>=20
> >  Guideline 2: From Section 5 of [RFC7112], when parsing an EH chain,
>=20
> That reads as if you are quoting RFC 7112, but you are not. Is this=20
> what you mean?:
>=20
>  Guideline 2: As a consequence of Section 5 of [RFC7112], when parsing=20
> an EH chain,
>=20
> Then you have this phrase twice:
>=20
> > field is not an Upper Layer (UL) protocol (i.e.  TCP)
>=20
> I hope you mean "(e.g. TCP)" because this would apply to any protocol,=20
> not just TCP.
>=20
> Also, you could add a note that the current list of defined EH values=20
> is maintained by IANA in the "IPv6 Extension Header Types" registry=20
> created by RFC 7045. This registry is intended precisely as a=20
> convenient reference for implementors.
>=20
> > Guideline 3: Thus, when parsing an EH chain,
> ...
> > o  an intermediate device that enforces policies (ACLs, stateful
> >    inspection and firewalling) by matching on IPv6 EHs MUST discard
> >    packets that have an HbH EH that is not first in the chain
> >    (Section 2.2 of [RFC7045]).  If the device is not parsing the EH
> >    chain, it MAY NOT discard the packets.
>=20
> I've already mentioned in private mail that this needs to be MUST NOT.
> However, a picky implementor will want to know how a device that is=20
> not parsing the header chain will even know that there is a HbH EH=20
> that is not first.
>=20
> > 4.  Parsing malformed EHs
> ...
> >    If the data of the last EH or the UL
> >    Header plus its data does not align with the original IPv6 Header
> >    Payload Length the packet MUST be dropped unless another policy step
> >    already discarded it.
>=20
> I think this is inconsistent with a statement in RFC 2460:
>=20
> > 4.7 No Next Header
> >=20
> >    The value 59 in the Next Header field of an IPv6 header or any
> >    extension header indicates that there is nothing following that
> >    header.  If the Payload Length field of the IPv6 header indicates th=
e
> >    presence of octets past the end of a header whose Next Header field
> >    contains 59, those octets must be ignored, and passed on unchanged i=
f
> >    the packet is forwarded.
>=20
> Unless I have misunderstood something, your guideline 5 needs an=20
> exception for the No Next Header case.
>=20
> (Or we could decide that the case described in RFC 2460 is an=20
> invitation to buffer overflow attacks, and change the rule.)
>=20
> Regards
>    Brian
>=20
> On 03/06/2014 05:36, Panos Kampanakis (pkampana) wrote:
> > Hello,
> >=20
> > I just submitted an Informational draft that provides guidelines for IP=
v6 implementers on how to parse IPv6 extension headers.
> >=20
> > There are multiple RFCs like RFC2460, RFC7112, RFC7045, RFC5722 and RFC=
6946 already that provide some rules on IPv6 packet processing. These addre=
ss separate issues and is tough for an implementer to track all rules in ea=
ch RFC. Additionally, there are some gaps in parsing malformed EHs and how =
EH chains should be parsed. To my knowledge, there is no document that and =
implementer could use as a single source of truth that would tell him how I=
Pv6 EH should be parsed. That has led to different implementations that are=
 inconsistent. For example malformed packets are in some cases processed an=
d others dropped based on vendor implementation.
> >=20
> > As more and more smart devices are starting to participate in the netwo=
rk, there is a need for a document that will ensure there is consistency on=
 how IPv6 EHs are processed to prevent inconsistencies and potential securi=
ty implications from incorrectly parsing headers. This document is trying t=
o address that need.
> >=20
> > Name:		draft-kampanakis-6man-ipv6-eh-parsing
> > Revision:	00
> > Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> > Document date:	2014-06-02
> > Group:		Individual Submission
> > Pages:		8
> > URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6m=
an-ipv6-eh-parsing-00.txt=20
> > Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-=
ipv6-eh-parsing=20
> > Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-e=
h-parsing-00=20
> >=20
> >=20
> > Thoughts on the doc being adopted as WG item and other feedback is welc=
ome.
> >=20
> > Panos
> > Cisco Systems
> >=20
> >=20
> >=20
> >=20
> > -----Original Message-----
> > From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> > Sent: Monday, June 02, 2014 1:08 PM
> > To: Panos Kampanakis (pkampana); Panos Kampanakis (pkampana)
> > Subject: New Version Notification for=20
> > draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> >=20
> >=20
> > A new version of I-D, draft-kampanakis-6man-ipv6-eh-parsing-00.txt
> > has been successfully submitted by Panos Kampanakis and posted to the I=
ETF repository.
> >=20
> > Name:		draft-kampanakis-6man-ipv6-eh-parsing
> > Revision:	00
> > Title:		Implementation Guidelines for parsing IPv6 Extension Headers
> > Document date:	2014-06-02
> > Group:		Individual Submission
> > Pages:		8
> > URL:            http://www.ietf.org/internet-drafts/draft-kampanakis-6m=
an-ipv6-eh-parsing-00.txt
> > Status:         https://datatracker.ietf.org/doc/draft-kampanakis-6man-=
ipv6-eh-parsing/
> > Htmlized:       http://tools.ietf.org/html/draft-kampanakis-6man-ipv6-e=
h-parsing-00
> >=20
> >=20
> > Abstract:
> >    IPv6 is widely used on the internet today and is expected to be
> >    deployed more as more devices (i.e. home automation) get inter-
> >    connected.  The IPv6 header format allows for the use of Extension
> >    Headers (EH).  EHs could be chained together with very few existing
> >    guidelines by the IPv6 protocol on how devices should parse them,
> >    which open room for security concerns and inconsistencies.  This
> >    document presents guidelines for parsing IPv6 EHs with a goal of
> >    providing a common and consistent parsing methodology for IPv6
> >    implementers among the industry.
> >=20
> >                                                                        =
          =20
> >=20
> >=20
> > Please note that it may take a couple of minutes from the time of submi=
ssion until the htmlized version and diff are available at tools.ietf.org.
> >=20
> > The IETF Secretariat
> >=20
> > --------------------------------------------------------------------
> > IETF IPv6 working group mailing list ipv6@ietf.org Administrative=20
> > Requests: https://www.ietf.org/mailman/listinfo/ipv6
> > --------------------------------------------------------------------
> >=20
>=20


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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Hi,
My comment/query may not be directly related to this subject but what is our=
 current position with regards to portable IPv6 subnets that are permitted f=
or IPv6 Internet?
There was one RFC recommending minimum /48
If that is the case, then we have accepted potentially 2.8 x 10^14 prefixes f=
or the Internet?
There was also an RFC (LISP) which provided a solution for mobility and mult=
ihoming/portability but doesn't look to be progressing much in terms of oper=
ators implementing ITR/ETRs in their network ...
So is there any additional document/draft that is looking into multihoming/p=
ortability and prefix scaling issue if all /48s eventually made it to the IP=
v6 Internet (similar to how we have almost all /24s appearing in IPv4 Intern=
et table)


From nobody Fri Jun 13 18:31:19 2014
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Message-ID: <539BA5E7.3050809@gmail.com>
Date: Sat, 14 Jun 2014 13:31:19 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Ole Troan <otroan@employees.org>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
References: <CAC8QAcfofsExPWPJSAGLz3k+-LYUcshUoFpRrfXfEyEHFns29A@mail.gmail.com> <CAKD1Yr0qdk9w80pRf=g3bs3JaO7_v-fQiOmQ9WriWWrDmNATeg@mail.gmail.com> <53963D6F.9040503@gmail.com> <CAKD1Yr0=Le7RFQ65eWescgM8pkt12+ko1uY0Q_x2f3qcSve8pw@mail.gmail.com> <5397D80B.4060807@gmail.com> <CAKD1Yr0PLC_1PnmsiS6oPBHsMxFbZcQLES4+CFqipJ=ZDtQHXw@mail.gmail.com> <53990EB8.6080608@gmail.com> <CAKD1Yr2RUicLeqEHtrROiDYUct_qV06+4wGKBUao2ej4_i3sxQ@mail.gmail.com> <539915EB.7030707@gmail.com> <CAKD1Yr0ZdMxnTTKF_FWg_kaTnawgzMWf9C9JiE4zssyNWJ_sxw@mail.gmail.com> <539A0900.9040101@globis.net> <539A8087.5010606@gmail.com> <61F9C47E-AAA2-4AB0-8539-E1123F70CEF1@employees.org>
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Ole,

comment at the end...

On 13/06/2014 22:00, Ole Troan wrote:
> Brian,
> 
>> Logically, the whole problem does solve itself if all multi-addressed
>> hosts also run the routing protocol. I'm beginning to wonder if
>> that isn't actually a lower cost solution than the alternatives.
> 
> Topology #1:
> 
> CER A    CER B
>    |               |
>    --------------
>            |
>         host
> 
> Topology #2:
> 
> CER A    CER B
>    |               |
>    --------------
>            |
>        router
>            |
>         host
> 
> Topology #3:
> 
> CER A ----|
>                  |----  host ---- CER B
> CER B ----|
> 
> 
> what do you mean by the "whole problem"?
> I assume we are talking about multi-prefix multihoming, in my mind that is where a host has a single interface with multiple addresses (from different /64s). each address is essentially connected to different exit circuits, and it is the responsibility of the host to "multi-home". 
> 
> topology #1 and #2 (which can be an arbitrary topology) is MHMP. Topology #1 is solved by rule 5.5 in RFC6724 (prefer the next-hop router that I learnt the source address from). Topology #2 is solved by SADR in the network.
> 
> all of them put quite a lot of requirements on the host/application:
>  - probing for working SA/DA pairs on connection
>  - load sharing across circuits
>  - failover to different SA/DA pair on failure
>  - take local host policy into consideration, e.g. prefer WIFI over 4G for cost reasons, rather than purely using the link with
>    best latency / bandwidth
>  - take connected network policy into consideration, e.g. only use source addresses from ISP A, when ISP B fails (cause that's my 
>    expensive backup link.)
> 
> would any of this be easier if the host had full routing information available? a full BGP feed from each ISP on each interface? I just can't see that, I need sub-second failover, BGP provides sub hour convergence. even participating in SADR doesn't really give the host very much, SADR only helps reaching the right exits in the local network. the routers do that for the host already. and yes in an arbitrary topology routers must use a routing protocol for that.
> 
> topology #3 which is what in my reading this draft focuses on. it appears to proposed that a multi-homed host (that is, with multiple interfaces) should trust a message from a router on one interface to install a route to a different router on another interface. that seems like a big departure from how routing generally works. and it makes a big assumption about how the host is connected to the network. it also seems like quite a far fetched use case. I'll connect to a WIFI link, to receive a default route that should point out the 4G interface?
> 
> as far as I'm concerned the problem of MHMP is solved, with SADR in the network and rule 5.5 in the host directly connected to do independent CERs. and while the local network can give some indication on failure, the network is largely unaware of the end to end connection, and I don't see any other option than that the host probes. isn't that what essentially shim6 does to? the use of MP-TCP would of course help a lot. what problem do you see as unsolved here?

I see the total problem as more complex because there are certainly other
scenarios, and in enterprise networks there's a general lack of
understanding that multiple prefixes should be considered the norm
in IPv6, as well as their interaction with ISP ingress filters
and with multiple border routers. So I stick to my view that we need
an overview document (to which your message would be a major
contribution). Unfortunately as I've already told Behcet off-list,
I just don't have the time to work on that and also I don't think
I have enough knowledge.

> what is lacking though, is how hosts / applications deal with multi-homing. I run MPMH at home and I have still not found any IP stack / application that handles that well. name based sockets seemed quite promising, anyone continuing work on that?

As far as I know it is dormant. I actually agree with you, if it could
be made to work. For a bit more discussion see my recent rant in CCR:
http://www.sigcomm.org/ccr/papers/2014/April/0000000.0000008

   Brian

> cheers,
> Ole


From nobody Fri Jun 13 18:33:47 2014
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Date: Sat, 14 Jun 2014 13:33:52 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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To: Lorenzo Colitti <lorenzo@google.com>
Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
References: <CAC8QAcfofsExPWPJSAGLz3k+-LYUcshUoFpRrfXfEyEHFns29A@mail.gmail.com> <CAKD1Yr0qdk9w80pRf=g3bs3JaO7_v-fQiOmQ9WriWWrDmNATeg@mail.gmail.com> <53963D6F.9040503@gmail.com> <CAKD1Yr0=Le7RFQ65eWescgM8pkt12+ko1uY0Q_x2f3qcSve8pw@mail.gmail.com> <5397D80B.4060807@gmail.com> <CAKD1Yr0PLC_1PnmsiS6oPBHsMxFbZcQLES4+CFqipJ=ZDtQHXw@mail.gmail.com> <53990EB8.6080608@gmail.com> <CAKD1Yr2RUicLeqEHtrROiDYUct_qV06+4wGKBUao2ej4_i3sxQ@mail.gmail.com> <539915EB.7030707@gmail.com> <CAKD1Yr0ZdMxnTTKF_FWg_kaTnawgzMWf9C9JiE4zssyNWJ_sxw@mail.gmail.com> <539A0900.9040101@globis.net> <539A8087.5010606@gmail.com> <CAKD1Yr35MKMVrwkVTg0LU+93L=i0F1Kz96QX3db0dbjyHyjVjg@mail.gmail.com>
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On 13/06/2014 17:01, Lorenzo Colitti wrote:
...
> What sort of problem are we trying to solve? If it's just a question of
> "this route is not likely to work from this source address", the host
> doesn't need a routing protocol. It just needs a way to have that hint
> communicated to it in a timely manner.

If your application runs over TCP, MPTCP resolves this.

   Brian


From nobody Mon Jun 16 09:05:18 2014
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Date: Mon, 16 Jun 2014 18:04:50 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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To: Ipv <ipv6@ietf.org>
Subject: New version of draft-petrescu-ipv6-over-80211p-02
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Hello participants to 6MAN WG,

We have just submitted version -02 of the IPv6-over-802.11p draft:

   http://tools.ietf.org/html/draft-petrescu-ipv6-over-80211p-02

The changelog from -01 is:

    o  updated authorship.

    o  added explanation about FCC not prohibiting IP on channels, and
       comments about engineering advice and reliability of IP messages.

    o  added possibility to use 6lowpan adaptation layer when in OCB
       mode.

    o  added appendix about the distribution of certificates to vehicles
       by using IPv6-over-802.11p single-hop communications.

    o  refined the explanation of 'half-rate' mode.

    o  added the privacy concerns and necessity of and potential effects
       of dynamically changing MAC addresses.

Comments welcome, thanks.

Alex, with co-authors.


-------- Message original --------
Sujet: I-D Action: draft-petrescu-ipv6-over-80211p-02.txt
Date : Mon, 16 Jun 2014 08:58:46 -0700
De : <internet-drafts@ietf.org>
Répondre à : <internet-drafts@ietf.org>
Pour : <i-d-announce@ietf.org>


A New Internet-Draft is available from the on-line Internet-Drafts 
directories.


         Title           : Transmission of IPv6 Packets over IEEE 
802.11p Networks
         Authors         : Alexandru Petrescu
                           Pierre Pfister
                           Nabil Benamar
                           Tim Leinmueller
	Filename        : draft-petrescu-ipv6-over-80211p-02.txt
	Pages           : 30
	Date            : 2014-06-16

Abstract:
    In order to transmit IPv6 packets on IEEE 802.11p networks there is a
    need to define a few parameters such as the recommended Maximum
    Transmission Unit size, the header format preceding the IPv6 base
    header, the Type value within it, and others.  This document
    describes these parameters for IPv6 and IEEE 802.11p networks; it
    portrays the layering of IPv6 on 802.11p similarly to other known
    802.11 and Ethernet layers, by using an existing Ethernet Adaptation
    Layer.

    In addition, the document attempts to list what is different in
    802.11p compared to more 'traditional' 802.11a/b/g/n layers, layers
    over which IPv6 protocols run ok.  Most notably, the operation
    outside the context of a BSS (OCB) has impact on IPv6 handover
    behaviour and on IPv6 security.

    An example of an IPv6 packet captured while transmitted over an IEEE
    802.11p link is given.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-petrescu-ipv6-over-80211p/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-petrescu-ipv6-over-80211p-02

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-petrescu-ipv6-over-80211p-02


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/

_______________________________________________
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Internet-Draft directories: http://www.ietf.org/shadow.html
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From nobody Mon Jun 16 10:21:08 2014
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Date: Mon, 16 Jun 2014 13:21:05 -0400
From: Brian Haberman <brian@innovationslab.net>
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To: draft-ietf-6man-multicast-addr-arch-update.all@tools.ietf.org,  6man WG <ipv6@ietf.org>
Subject: AD Evaluation: draft-ietf-6man-multicast-addr-arch-update
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All,
     I have completed my AD Evaluation of
draft-ietf-6man-multicast-addr-arch-update as a part of the publication
process.  Please review these comments, discuss as necessary, and
resolve them.  Once a revision is available that addresses these
comments, the document can proceed to the next phase of the publication
process (IETF Last Call).


* Re-word the Abstract to remove explicit reference to the reserved bits
location.  Something like "...by re-defining the reserved bits as
generic..."

* Section 1 - This document updates the IPv6 addressing architecture
(not the multicast addressing architecture) to change the reserved bits
to flag bits.

* Sections 1 & 2 - If the text contains the actual offset of the bits
being changed, the document needs to indicate what reference point is
being used.  For example, RFC 4291 refers to "high-order bits" to
indicate the point of reference.

* Section 2

1. What is the rationale for the use of the term "so-called" in
reference to Embedded-RP?

2. I would suggest specifying that ff1 directly maps to flgs in 4291 & 39=
56.

* There is quite a bit of redundancy between sections 2 & 4, but not
information is contained in 2. I would suggest re-structuring these
sections so that one contains the rationale for this change and the
other contains the complete list of updates being made to the affected
documents.

* This may be nit-picky, but I would like to see the names listed in the
Acknowledgements be completely spelled out.

* idnits indicates issues that need to be addressed.


Regards,
Brian


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From nobody Tue Jun 17 04:39:13 2014
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From: <mohamed.boucadair@orange.com>
To: Brian Haberman <brian@innovationslab.net>, "draft-ietf-6man-multicast-addr-arch-update.all@tools.ietf.org" <draft-ietf-6man-multicast-addr-arch-update.all@tools.ietf.org>, 6man WG <ipv6@ietf.org>
Subject: RE: AD Evaluation: draft-ietf-6man-multicast-addr-arch-update
Thread-Topic: AD Evaluation: draft-ietf-6man-multicast-addr-arch-update
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Date: Tue, 17 Jun 2014 11:39:03 +0000
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Hi Brian,

Thank you for the review.=20

The editorial comments will be fixed in -05.

We fixed idnits issues except these two ones (that we don't think are issue=
s):

* Lack of a disclaimer for pre-RFC5378 work:
    When we specify the explicit changes we quote text from documents
    older than 2008, and the new next is largely the same as the old
    one. We don't think we want to contact all authors about BCP78 rights.

* Missing Reference: 'ADDRARCH':
    This is not a missing reference. It is only here because we quote
    some text from a document which has this reference.

The new version will be available online soon.

Cheers,
Med=20

>-----Message d'origine-----
>De=A0: ipv6 [mailto:ipv6-bounces@ietf.org] De la part de Brian Haberman
>Envoy=E9=A0: lundi 16 juin 2014 19:21
>=C0=A0: draft-ietf-6man-multicast-addr-arch-update.all@tools.ietf.org; 6ma=
n WG
>Objet=A0: AD Evaluation: draft-ietf-6man-multicast-addr-arch-update
>
>All,
>     I have completed my AD Evaluation of
>draft-ietf-6man-multicast-addr-arch-update as a part of the publication
>process.  Please review these comments, discuss as necessary, and
>resolve them.  Once a revision is available that addresses these
>comments, the document can proceed to the next phase of the publication
>process (IETF Last Call).
>
>
>* Re-word the Abstract to remove explicit reference to the reserved bits
>location.  Something like "...by re-defining the reserved bits as
>generic..."
>
>* Section 1 - This document updates the IPv6 addressing architecture
>(not the multicast addressing architecture) to change the reserved bits
>to flag bits.
>
>* Sections 1 & 2 - If the text contains the actual offset of the bits
>being changed, the document needs to indicate what reference point is
>being used.  For example, RFC 4291 refers to "high-order bits" to
>indicate the point of reference.
>
>* Section 2
>
>1. What is the rationale for the use of the term "so-called" in
>reference to Embedded-RP?
>
>2. I would suggest specifying that ff1 directly maps to flgs in 4291 &
>3956.
>
>* There is quite a bit of redundancy between sections 2 & 4, but not
>information is contained in 2. I would suggest re-structuring these
>sections so that one contains the rationale for this change and the
>other contains the complete list of updates being made to the affected
>documents.
>
>* This may be nit-picky, but I would like to see the names listed in the
>Acknowledgements be completely spelled out.
>
>* idnits indicates issues that need to be addressed.
>
>
>Regards,
>Brian


From nobody Tue Jun 17 13:11:05 2014
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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Behcet Sarikaya <sarikaya2012@gmail.com>
To: Ole Troan <otroan@employees.org>
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Hi Ole,


On Fri, Jun 13, 2014 at 5:00 AM, Ole Troan <otroan@employees.org> wrote:
> Brian,
>
>> Logically, the whole problem does solve itself if all multi-addressed
>> hosts also run the routing protocol. I'm beginning to wonder if
>> that isn't actually a lower cost solution than the alternatives.
>
> Topology #1:
>
> CER A    CER B
>    |               |
>    --------------
>            |
>         host
>
> Topology #2:
>
> CER A    CER B
>    |               |
>    --------------
>            |
>        router
>            |
>         host
>
> Topology #3:
>
> CER A ----|
>                  |----  host ---- CER B
> CER B ----|
>

What is CER in your topologies? I did not see them used in RFC 7157?

Behcet
>
> what do you mean by the "whole problem"?
> I assume we are talking about multi-prefix multihoming, in my mind that i=
s where a host has a single interface with multiple addresses (from differe=
nt /64s). each address is essentially connected to different exit circuits,=
 and it is the responsibility of the host to "multi-home".
>
> topology #1 and #2 (which can be an arbitrary topology) is MHMP. Topology=
 #1 is solved by rule 5.5 in RFC6724 (prefer the next-hop router that I lea=
rnt the source address from). Topology #2 is solved by SADR in the network.
>
> all of them put quite a lot of requirements on the host/application:
>  - probing for working SA/DA pairs on connection
>  - load sharing across circuits
>  - failover to different SA/DA pair on failure
>  - take local host policy into consideration, e.g. prefer WIFI over 4G fo=
r cost reasons, rather than purely using the link with
>    best latency / bandwidth
>  - take connected network policy into consideration, e.g. only use source=
 addresses from ISP A, when ISP B fails (cause that's my
>    expensive backup link.)
>
> would any of this be easier if the host had full routing information avai=
lable? a full BGP feed from each ISP on each interface? I just can't see th=
at, I need sub-second failover, BGP provides sub hour convergence. even par=
ticipating in SADR doesn't really give the host very much, SADR only helps =
reaching the right exits in the local network. the routers do that for the =
host already. and yes in an arbitrary topology routers must use a routing p=
rotocol for that.
>
> topology #3 which is what in my reading this draft focuses on. it appears=
 to proposed that a multi-homed host (that is, with multiple interfaces) sh=
ould trust a message from a router on one interface to install a route to a=
 different router on another interface. that seems like a big departure fro=
m how routing generally works. and it makes a big assumption about how the =
host is connected to the network. it also seems like quite a far fetched us=
e case. I'll connect to a WIFI link, to receive a default route that should=
 point out the 4G interface?
>
> as far as I'm concerned the problem of MHMP is solved, with SADR in the n=
etwork and rule 5.5 in the host directly connected to do independent CERs. =
and while the local network can give some indication on failure, the networ=
k is largely unaware of the end to end connection, and I don't see any othe=
r option than that the host probes. isn't that what essentially shim6 does =
to? the use of MP-TCP would of course help a lot. what problem do you see a=
s unsolved here?
>
> what is lacking though, is how hosts / applications deal with multi-homin=
g. I run MPMH at home and I have still not found any IP stack / application=
 that handles that well. name based sockets seemed quite promising, anyone =
continuing work on that?
>
> cheers,
> Ole
>
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
>


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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> What is CER in your topologies? I did not see them used in RFC 7157?

Customer Edge Router. See RFC6204, or the homenet-arch document.

cheers,
Ole

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From nobody Tue Jun 17 13:28:04 2014
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Date: Wed, 18 Jun 2014 08:28:00 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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To: Usman Latif <osmankh@yahoo.com>
Subject: "portable" IPv6 subnets [was New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt]
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Regards
   Brian Carpenter
   http://orcid.org/0000-0001-7924-6182




On 14/06/2014 10:06, Usman Latif wrote:
> Hi, My comment/query may not be directly related to this
> subject 

No

> but what is our current position with regards to
> portable IPv6 subnets that are permitted for IPv6 Internet? 

I don't like the word "portable". After all, IPv6 prefixes are
loaned not given.

> There was one RFC recommending minimum /48 

You may be thinking of obsolete RFC 3177. Please read RFC 6177,
which is a bit more up to date.

> If that is the
> case, then we have accepted potentially 2.8 x 10^14 prefixes
> for the Internet?

As a theoretical possibility, there are many more than that, but
the actual number is of course vastly less and is climbing at a
modest rate (see Geoff Huston's work for the facts).

> There was also an RFC (LISP) which provided
> a solution for mobility and multihoming/portability 

LISP has several RFCs and its own WG, but what it actually
offers is a solution for BGP-4 scaling.

> but
> doesn't look to be progressing much in terms of operators
> implementing ITR/ETRs in their network ... So is there any
> additional document/draft that is looking into
> multihoming/portability and prefix scaling issue if all /48s
> eventually made it to the IPv6 Internet 

I'm on record as suggesting that the real-world concern is a
maximum of something like 10 million prefixes wanting to be
announced in BGP-4. I'll stick to that, but this isn't really
the place for that discussion.

(similar to how we
> have almost all /24s appearing in IPv4 Internet table)

No we don't.

   Brian


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
From: Behcet Sarikaya <sarikaya2012@gmail.com>
To: Ole Troan <otroan@employees.org>
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Then I don't understand your Topology #2, it is not in homenet-arch?
Where is it, what is it?

Behcet

On Tue, Jun 17, 2014 at 3:21 PM, Ole Troan <otroan@employees.org> wrote:
>> What is CER in your topologies? I did not see them used in RFC 7157?
>
> Customer Edge Router. See RFC6204, or the homenet-arch document.
>
> cheers,
> Ole


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Subject: Re: New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt
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> Then I don't understand your Topology #2, it is not in homenet-arch?
> Where is it, what is it?

what don't you understand?
Two ISPs, two CERs, internal router on shared subnet

cheers,
Ole


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From: Usman Latif <osmankh@yahoo.com>
Subject: Re: "portable" IPv6 subnets [was New Version Notification for draft-sarikaya-6man-next-hop-ra-02.txt]
Date: Wed, 18 Jun 2014 10:32:09 +1000
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Thanks Brian for your comments,

=46rom both 3177 and 6177 and seeing what is happening in practice, it seems=
 /48 has been accepted as a commonly agreed prefix length (for now) which is=
 accepted between ISPs boundaries today.

My query was mainly to find out: whether we have accepted the fact that the D=
FZ would be open to however many /48s that are advertised to it or is there w=
ork happening (or already happened and I am unaware of) in IETF to devise a p=
rotocol that could reduce these advertisements while still allowing end-to-e=
nd reachability?=20
(route aggregation never seems to be implemented too well in practice and we=
 saw this in IPv4 already)

Regards,
Usman


> On 18 Jun 2014, at 6:28 am, Brian E Carpenter <brian.e.carpenter@gmail.com=
> wrote:
>=20
>=20
> Regards
>   Brian Carpenter
>   http://orcid.org/0000-0001-7924-6182
>=20
>=20
>=20
>=20
>> On 14/06/2014 10:06, Usman Latif wrote:
>> Hi, My comment/query may not be directly related to this
>> subject
>=20
> No
>=20
>> but what is our current position with regards to
>> portable IPv6 subnets that are permitted for IPv6 Internet?
>=20
> I don't like the word "portable". After all, IPv6 prefixes are
> loaned not given.
>=20
>> There was one RFC recommending minimum /48
>=20
> You may be thinking of obsolete RFC 3177. Please read RFC 6177,
> which is a bit more up to date.
>=20
>> If that is the
>> case, then we have accepted potentially 2.8 x 10^14 prefixes
>> for the Internet?
>=20
> As a theoretical possibility, there are many more than that, but
> the actual number is of course vastly less and is climbing at a
> modest rate (see Geoff Huston's work for the facts).
>=20
>> There was also an RFC (LISP) which provided
>> a solution for mobility and multihoming/portability
>=20
> LISP has several RFCs and its own WG, but what it actually
> offers is a solution for BGP-4 scaling.
>=20
>> but
>> doesn't look to be progressing much in terms of operators
>> implementing ITR/ETRs in their network ... So is there any
>> additional document/draft that is looking into
>> multihoming/portability and prefix scaling issue if all /48s
>> eventually made it to the IPv6 Internet
>=20
> I'm on record as suggesting that the real-world concern is a
> maximum of something like 10 million prefixes wanting to be
> announced in BGP-4. I'll stick to that, but this isn't really
> the place for that discussion.
>=20
> (similar to how we
>> have almost all /24s appearing in IPv4 Internet table)
>=20
> No we don't.
>=20
>   Brian


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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 IPv6 Maintenance Working Group of the IETF.

        Title           : Updates to the IPv6 Multicast Addressing Architecture
        Authors         : Mohamed Boucadair
                          Stig Venaas
	Filename        : draft-ietf-6man-multicast-addr-arch-update-05.txt
	Pages           : 9
	Date            : 2014-06-18

Abstract:
   This document updates the IPv6 multicast addressing architecture by
   re-defining the reserved bits as generic flag bits.  The document
   provides also some clarifications related to the use of these flag
   bits.

   This document updates RFC 3956, RFC 3306 and RFC 4291.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-6man-multicast-addr-arch-update/

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-6man-multicast-addr-arch-update-05

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-6man-multicast-addr-arch-update-05


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 18 01:32:01 2014
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Subject: Re: 6MAN WGLC: draft-ietf-6man-enhanced-dad
From: Ole Troan <otroan@employees.org>
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Date: Wed, 18 Jun 2014 10:29:16 +0200
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All,

This WGLC has not received a single comment.=20
We will keep this last call open until we get some review of the =
document. We also need a volunteer to do a detailed review.

Best regards,
Ole

On 03 Jun 2014, at 17:09 , Ole Troan <otroan@employees.org> wrote:

> All,
>=20
> This message starts a two week 6MAN Working Group Last Call on =
draft-ietf-6man-enhanced-dad
>=20
> 	Title           : Enhanced Duplicate Address Detection
> 	Author(s)   : R. Asati, H. Singh, W. Beebee, E. Dart, W. George, =
C. Pignataro
> 	Filename   : draft-ietf-6man-enhanced-dad-05
> 	Pages        : 11
> 	Date           : 2014-05-02
>    http://tools.ietf.org/html/draft-ietf-6man-enhanced-dad
>=20
> as a Proposed Standards document. Substantive comments and statements =
of support for advancing this document should be directed to the mailing =
list. Editorial suggestions can be sent to the authors.  This last call =
will end on June 17, 2014.
>=20
> We need volunteers to do a detailed review of the document. We would =
also encourage volunteers to act as document shepherds. Please contact =
the chairs directly.
>=20
> Regards,
>=20
> Bob Hinden & Ole Tr=F8an
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------


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From nobody Wed Jun 18 08:26:28 2014
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Subject: Re: 6MAN WGLC: draft-ietf-6man-enhanced-dad
From: =?UTF-8?B?56We5piO6YGU5ZOJ?= <jinmei@wide.ad.jp>
To: Ole Troan <otroan@employees.org>
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At Wed, 18 Jun 2014 10:29:16 +0200,
Ole Troan <otroan@employees.org> wrote:

> This WGLC has not received a single comment.
> We will keep this last call open until we get some review of the document. We also need a volunteer to do a detailed review.

I've read the draft on the LC, but didn't find anything obviously
wrong or any useful comments that could improve it.  I didn't
explicitly respond to the LC since I generally don't like to respond
with a one-liner like "no objection":-).  I also didn't volunteer for
a detailed review as I didn't seem to be able to provide any
non-trivial feedback.  But if there's no other (and better) volunteer
I'll give another, a bit closer read, and see if I can say something
more meaningful.

--
JINMEI, Tatuya


From nobody Wed Jun 18 11:45:11 2014
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The IESG has received a request from the IPv6 Maintenance WG (6man) to
consider the following document:
- 'Updates to the IPv6 Multicast Addressing Architecture'
  <draft-ietf-6man-multicast-addr-arch-update-05.txt> as Proposed
Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2014-07-02. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   This document updates the IPv6 multicast addressing architecture by
   re-defining the reserved bits as generic flag bits.  The document
   provides also some clarifications related to the use of these flag
   bits.

   This document updates RFC 3956, RFC 3306 and RFC 4291.





The file can be obtained via
http://datatracker.ietf.org/doc/draft-ietf-6man-multicast-addr-arch-update/

IESG discussion can be tracked via
http://datatracker.ietf.org/doc/draft-ietf-6man-multicast-addr-arch-update/ballot/


No IPR declarations have been submitted directly on this I-D.



From nobody Thu Jun 19 05:08:33 2014
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Subject: draft-ietf-6man-resilient-rs update
Date: Thu, 19 Jun 2014 14:08:05 +0200
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all,

we have had this document in a WGLC for quite a while. there has been =
one outstanding issue.
the document as currently written states:

Abstract:
   Furthermore, on some links, unsolicited multicast
   Router Advertisements are never sent and the mechanism in this
   document is intended to work even in such scenarios.

Introduction:
   b.  Access networks/links that turn off periodic RAs and only send
       RAs in response to RSs.  In this case, if the link between the
       Access Point (AP) and the host comes up before the link between
       the AP and the Controller/Router, the host will never be able to
       connect.  This technique of turning off periodic RAs is commonly
       used in several wireless LAN and datacenter networks to reduce
       the amount of multicast traffic.

in the specification part of the document it states:
   On multicast-capable links, the hosts following this specification
   SHOULD stop retransmitting the RSs when Router Discovery is
   successful (i.e. an RA with a non-zero Router Lifetime that results
   in a default route is received).

as written a host connected to a link with the properties described in =
b, would lose its default router after the initial RA lifetime, and =
would not recover.

there are two solutions to this:
1) remove the text in the abstract and introduction implying that this =
is a solution to links with multicast RA turned off
2) modify the algorithm to restart router solicitations when required

after discussing this issue with the authors, there appears to be =
agreement to we resolve this issue by focusing the document on initial =
connection to the link only (1).

unless this is contentious, the authors will publish an updated revision =
with these changes, that we'll run a short WGLC on, and then we will =
advance the document to the IESG.

Best regards,
Ole



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From nobody Thu Jun 19 07:27:20 2014
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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Ole Troan <otroan@employees.org>, 6man WG <ipv6@ietf.org>
Subject: Re: 6MAN WGLC: draft-ietf-6man-enhanced-dad
Thread-Topic: 6MAN WGLC: draft-ietf-6man-enhanced-dad
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So let's go for it...

Minor comment, why is Carlos not in the same block of Cisco authors?

I would prefer to have section 1 (terminology) after section 2
(introduction).

Section 1:
- first bullet s/Note even Optimistic/Note: even Optimistic/
- loopback does not always loop between the same physical interface...
Think about a layer-3 switch with two different layer-2 interface for the
same layer-3 interface, looping the layer-2 interfaces will also introduce
a loop
- NS(DAD) should we add the destination at layer-2 and layer-3 being a
mcast?

Section 2 should be a real introduction, i.e., more the 'problem
description' in a new section ;-)
- "The interface issues a NS for the IPv6 link-local address DAD" why
restricting to LLA only? GUA/ULA have the same problem
- the last paragraph would benefit if rewritten, not really easy to
understand and ASCII art would help, also state that the cable-modem are
in bridge mode
- s/one layer 3 interface/one layer-3 interface/
- s/100 thousand/hundred thousands/

Section 3.1
- this I-D would benefit of a better punctuation, such as s/simplest the
mitigation/simplest; the mitigation/
- not sure whether a core router 'SHOULD' support disabling DAD...
Consequences could be catastrophic for a core router

Section 3.2:
- s/layer 2 protocols/layer-2 protocols/ (to be applied multiple times)
- add using the source MAC address as differentiator example?

Section 4:
- should we add 'mitigation 'to the section title to be similar to section
3?
- s/sufficiently large for nonce collisions/sufficiently large for
avoiding nonce collisions/

Section 4.2:
- split the paragraph in two pieces: one for the sheer sending and one for
repeating the sending of the probes
- not sure why enhanced DAD should be optional... Why not making it
mandatory?

Section 4.3:
- s/compares the nonce, if any, is included in the message/compares the
nonce included in the message, if any,/
- not sure why the last sentence is there as it is relevant to section 4.2

Section 6:
- should we add that the nonce does not protect against the DoS caused by
a rogue node replying by fake NA to all DAD probes?

Hope this helps

-=E9ric

On 3/06/14 17:09, "Ole Troan" <otroan@employees.org> wrote:

>All,
>
>This message starts a two week 6MAN Working Group Last Call on
>draft-ietf-6man-enhanced-dad
>
>	Title           : Enhanced Duplicate Address Detection
>	Author(s)   : R. Asati, H. Singh, W. Beebee, E. Dart, W. George, C.
>Pignataro
>	Filename   : draft-ietf-6man-enhanced-dad-05
>	Pages        : 11
>	Date           : 2014-05-02
>    http://tools.ietf.org/html/draft-ietf-6man-enhanced-dad
>
>as a Proposed Standards document. Substantive comments and statements of
>support for advancing this document should be directed to the mailing
>list. Editorial suggestions can be sent to the authors.  This last call
>will end on June 17, 2014.
>
>We need volunteers to do a detailed review of the document. We would also
>encourage volunteers to act as document shepherds. Please contact the
>chairs directly.
>
>Regards,
>
>Bob Hinden & Ole Tr=F8an


From nobody Thu Jun 19 09:17:00 2014
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From: Dmitry Anipko <Dmitry.Anipko@microsoft.com>
To: Ole Troan <otroan@employees.org>, 6man WG <ipv6@ietf.org>, "draft-ietf-6man-resilient-rs@tools.ietf.org" <draft-ietf-6man-resilient-rs@tools.ietf.org>
Subject: RE: draft-ietf-6man-resilient-rs update
Thread-Topic: draft-ietf-6man-resilient-rs update
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Date: Thu, 19 Jun 2014 16:16:46 +0000
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My impression from the discussion in London that the consensus was closer t=
o (2) than (1) - that on such links the hosts should be allowed to restart =
transmissions in a reasonable / rate-limited manner, when connectivity para=
meters expire. And that we should add MAY text for that.=0A=
=0A=
The minutes seem to be consistent with my impression:=0A=
=0A=
<quote>=0A=
Andrew: I agree with both Erik and Lorenzo. We should not explicitly=0A=
          prohibit hosts from 1.b.=0A=
          =0A=
Suresh: If we keep 1.b., we would need to address it.=0A=
          =0A=
Andrew: Don't prohibit it, so that it may be addressed in another=0A=
          document.=0A=
...=0A=
=0A=
Dave Thaler: Keep scenario 1.b. Do constraints on rate-limiting. We have=0A=
          cases where ND varies by a specific ling-layer. Indeed, the mecha=
nisms=0A=
          in this document comes from one of those documents. I think I'm i=
n=0A=
          agreement with what I think is the consensus.=0A=
          =0A=
</quote>=0A=
________________________________________=0A=
From: Ole Troan <otroan@employees.org>=0A=
Sent: Thursday, June 19, 2014 5:08 AM=0A=
To: 6man WG; draft-ietf-6man-resilient-rs@tools.ietf.org=0A=
Cc: <6man-chairs@tools.ietf.org>=0A=
Subject: draft-ietf-6man-resilient-rs update=0A=
=0A=
all,=0A=
=0A=
we have had this document in a WGLC for quite a while. there has been one o=
utstanding issue.=0A=
the document as currently written states:=0A=
=0A=
Abstract:=0A=
   Furthermore, on some links, unsolicited multicast=0A=
   Router Advertisements are never sent and the mechanism in this=0A=
   document is intended to work even in such scenarios.=0A=
=0A=
Introduction:=0A=
   b.  Access networks/links that turn off periodic RAs and only send=0A=
       RAs in response to RSs.  In this case, if the link between the=0A=
       Access Point (AP) and the host comes up before the link between=0A=
       the AP and the Controller/Router, the host will never be able to=0A=
       connect.  This technique of turning off periodic RAs is commonly=0A=
       used in several wireless LAN and datacenter networks to reduce=0A=
       the amount of multicast traffic.=0A=
=0A=
in the specification part of the document it states:=0A=
   On multicast-capable links, the hosts following this specification=0A=
   SHOULD stop retransmitting the RSs when Router Discovery is=0A=
   successful (i.e. an RA with a non-zero Router Lifetime that results=0A=
   in a default route is received).=0A=
=0A=
as written a host connected to a link with the properties described in b, w=
ould lose its default router after the initial RA lifetime, and would not r=
ecover.=0A=
=0A=
there are two solutions to this:=0A=
1) remove the text in the abstract and introduction implying that this is a=
 solution to links with multicast RA turned off=0A=
2) modify the algorithm to restart router solicitations when required=0A=
=0A=
after discussing this issue with the authors, there appears to be agreement=
 to we resolve this issue by focusing the document on initial connection to=
 the link only (1).=0A=
=0A=
unless this is contentious, the authors will publish an updated revision wi=
th these changes, that we'll run a short WGLC on, and then we will advance =
the document to the IESG.=0A=
=0A=
Best regards,=0A=
Ole=0A=
=0A=


From nobody Thu Jun 19 12:38:58 2014
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From: "Hemant Singh (shemant)" <shemant@cisco.com>
To: "Eric Vyncke (evyncke)" <evyncke@cisco.com>, Ole Troan <otroan@employees.org>, 6man WG <ipv6@ietf.org>
Subject: RE: 6MAN WGLC: draft-ietf-6man-enhanced-dad
Thread-Topic: 6MAN WGLC: draft-ietf-6man-enhanced-dad
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Eric,

Appreciate the review.  I and Wes Beebee discussed the comments and I am re=
plying.  Please see in line below between "<hs>... </hs>".

-----Original Message-----
From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Eric Vyncke (evyncke=
)
Sent: Thursday, June 19, 2014 10:27 AM
To: Ole Troan; 6man WG
Cc: <6man-chairs@tools.ietf.org>
Subject: Re: 6MAN WGLC: draft-ietf-6man-enhanced-dad

>So let's go for it...
>
>Minor comment, why is Carlos not in the same block of Cisco authors?

<hs> No specific reason.  I can make the change. </hs>

>I would prefer to have section 1 (terminology) after section 2 (introducti=
on).

<hs>Agreed.  Will make the change. </hs>

>Section 1:
>- first bullet s/Note even Optimistic/Note: even Optimistic/

<hs>Ok, will make the change. </hs>

>- loopback does not always loop between the same physical interface...
>Think about a layer-3 switch with two different layer-2 interface for the =
same layer-3 interface, looping the layer-2 interfaces will also introduce =
a loop

<hs>Will add "layer-3" to the third bullet in the Terminology section where=
 the first instance of "interface" exists. <hs>

> - NS(DAD) should we add the destination at layer-2 and layer-3 being a mc=
ast?

<hs> We can stick to the RFC 4861 definition for the NS and then nothing el=
se needs to be articulated.   I will change the text of the last bullet fro=
m=20

o  NS(DAD) - shorthand notation to denote an Neighbor Solicitation
      (NS) with unspecified IPv6 source-address issued during DAD.

To

o  NS(DAD) - shorthand notation to denote an Neighbor Solicitation
      (NS) (as specified in RFC 4861) with unspecified IPv6 source-address =
issued during DAD.

</hs>

>Section 2 should be a real introduction, i.e., more the 'problem descripti=
on' in a new section ;-)
>- "The interface issues a NS for the IPv6 link-local address DAD" why rest=
ricting to LLA only? GUA/ULA have the same problem

<hs> Will remove the link-local address.  I was articulating the original p=
roblem verbatim in that the link-local address failed DAD and it is the lin=
k-local that gets created first during an interface coming up. </hs>

>- the last paragraph would benefit if rewritten, not really easy to unders=
tand and ASCII art would help, also state that the cable-modem are in bridg=
e mode

<hs> I will add ascii art and also rewrite.  A diagram was presented for th=
is use case at the Taipei IETF in the slides presented.  Please see slide 5=
 titled "Cable Broadband Problem" in the slides at the URL below.=20

http://www.ietf.org/proceedings/82/slides/6man-2.pdf

</hs>

>- s/one layer 3 interface/one layer-3 interface/

<hs> Will make the change. </hs>

- s/100 thousand/hundred thousands/

<hs> Will make the change. </hs>

>Section 3.1
>- this I-D would benefit of a better punctuation, such as s/simplest the m=
itigation/simplest; the mitigation/

<hs>Will replace the ";" with a comma.  New text is below.=20
[While this mitigation may be the simplest,  it has three drawbacks.]
</hs>

>- not sure whether a core router 'SHOULD' support disabling DAD...
>Consequences could be catastrophic for a core router

<hs>The WG could not agree to a MUST because an interface on any IPv6 node =
would end up supporting the new Enhanced DAD algorithm.  However, some lega=
cy nodes may never be upgraded to the new algorithm and thus the use of SHO=
ULD </hs>

>Section 3.2:
>- s/layer 2 protocols/layer-2 protocols/ (to be applied multiple times)

<hs>Will do. </hs>

>- add using the source MAC address as differentiator example?

<hs>What happens if the network has a genuine duplicate mac-address?  If th=
e network is a PPP network then there is no chance of a genuine duplicate. =
</hs>

>Section 4:
>- should we add 'mitigation 'to the section title to be similar to section=
 3?
>- s/sufficiently large for nonce collisions/sufficiently large for avoidin=
g nonce collisions/

<hs> No.  Section 4 is the solution and that is why this section does not n=
eed any mitigation keyword in section title. </hs>

>Section 4.2:
>- split the paragraph in two pieces: one for the sheer sending and one for=
 repeating the sending of the probes

<hs> Will do. </hs>

>- not sure why enhanced DAD should be optional... Why not making it mandat=
ory?

<hs>Please see above. </hs>

>Section 4.3:
>- s/compares the nonce, if any, is included in the message/compares the no=
nce included in the message, if any,/

<hs>Will make the change. </hs>

>- not sure why the last sentence is there as it is relevant to section 4.2

<hs>In each section in 4.2 and 4.3 other reviewers wanted  an explicit ment=
ion of moving the Target Address to assigned state. </hs>


>Section 6:
>- should we add that the nonce does not protect against the DoS caused by =
a rogue node replying by fake NA to all DAD probes?

<hs>Sure.  Then I will add text saying "SEND is recommended to circumvent t=
his exploit.".   Section 9.2.3 of the SEND RFC covers this attack. </hs>

>Hope this helps

<hs>Helps greatly - thanks much! </hs>

Hemant

-=E9ric

On 3/06/14 17:09, "Ole Troan" <otroan@employees.org> wrote:

>All,
>
>This message starts a two week 6MAN Working Group Last Call on=20
>draft-ietf-6man-enhanced-dad
>
>	Title           : Enhanced Duplicate Address Detection
>	Author(s)   : R. Asati, H. Singh, W. Beebee, E. Dart, W. George, C.
>Pignataro
>	Filename   : draft-ietf-6man-enhanced-dad-05
>	Pages        : 11
>	Date           : 2014-05-02
>    http://tools.ietf.org/html/draft-ietf-6man-enhanced-dad
>
>as a Proposed Standards document. Substantive comments and statements=20
>of support for advancing this document should be directed to the=20
>mailing list. Editorial suggestions can be sent to the authors.  This=20
>last call will end on June 17, 2014.
>
>We need volunteers to do a detailed review of the document. We would=20
>also encourage volunteers to act as document shepherds. Please contact=20
>the chairs directly.
>
>Regards,
>
>Bob Hinden & Ole Tr=F8an

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Subject: Re: draft-ietf-6man-resilient-rs update
From: Ole Troan <otroan@employees.org>
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> My impression from the discussion in London that the consensus was =
closer to (2) than (1) - that on such links the hosts should be allowed =
to restart transmissions in a reasonable / rate-limited manner, when =
connectivity parameters expire. And that we should add MAY text for =
that.

that's also fine with me. if there was a text proposal it would most =
likely be easier for the working group to come to a decision.
is that something the authors can take on?

cheers,
Ole


>=20
> The minutes seem to be consistent with my impression:
>=20
> <quote>
> Andrew: I agree with both Erik and Lorenzo. We should not explicitly
>          prohibit hosts from 1.b.
>=20
> Suresh: If we keep 1.b., we would need to address it.
>=20
> Andrew: Don't prohibit it, so that it may be addressed in another
>          document.
> ...
>=20
> Dave Thaler: Keep scenario 1.b. Do constraints on rate-limiting. We =
have
>          cases where ND varies by a specific ling-layer. Indeed, the =
mechanisms
>          in this document comes from one of those documents. I think =
I'm in
>          agreement with what I think is the consensus.
>=20
> </quote>
> ________________________________________
> From: Ole Troan <otroan@employees.org>
> Sent: Thursday, June 19, 2014 5:08 AM
> To: 6man WG; draft-ietf-6man-resilient-rs@tools.ietf.org
> Cc: <6man-chairs@tools.ietf.org>
> Subject: draft-ietf-6man-resilient-rs update
>=20
> all,
>=20
> we have had this document in a WGLC for quite a while. there has been =
one outstanding issue.
> the document as currently written states:
>=20
> Abstract:
>   Furthermore, on some links, unsolicited multicast
>   Router Advertisements are never sent and the mechanism in this
>   document is intended to work even in such scenarios.
>=20
> Introduction:
>   b.  Access networks/links that turn off periodic RAs and only send
>       RAs in response to RSs.  In this case, if the link between the
>       Access Point (AP) and the host comes up before the link between
>       the AP and the Controller/Router, the host will never be able to
>       connect.  This technique of turning off periodic RAs is commonly
>       used in several wireless LAN and datacenter networks to reduce
>       the amount of multicast traffic.
>=20
> in the specification part of the document it states:
>   On multicast-capable links, the hosts following this specification
>   SHOULD stop retransmitting the RSs when Router Discovery is
>   successful (i.e. an RA with a non-zero Router Lifetime that results
>   in a default route is received).
>=20
> as written a host connected to a link with the properties described in =
b, would lose its default router after the initial RA lifetime, and =
would not recover.
>=20
> there are two solutions to this:
> 1) remove the text in the abstract and introduction implying that this =
is a solution to links with multicast RA turned off
> 2) modify the algorithm to restart router solicitations when required
>=20
> after discussing this issue with the authors, there appears to be =
agreement to we resolve this issue by focusing the document on initial =
connection to the link only (1).
>=20
> unless this is contentious, the authors will publish an updated =
revision with these changes, that we'll run a short WGLC on, and then we =
will advance the document to the IESG.
>=20
> Best regards,
> Ole
>=20


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Subject: New Version Notification for draft-sarikaya-dhc-dhcpv6-raoptions-sadr-00.txt
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A new version of I-D, draft-sarikaya-dhc-dhcpv6-raoptions-sadr-00.txt
has been successfully submitted by Behcet Sarikaya and posted to the
IETF repository.

Name:           draft-sarikaya-dhc-dhcpv6-raoptions-sadr
Revision:       00
Title:          DHCPv6 Route Options for Source Address Dependent Routing
Document date:  2014-06-20
Group:          Individual Submission
Pages:          15
URL:
http://www.ietf.org/internet-drafts/draft-sarikaya-dhc-dhcpv6-raoptions-sadr-00.txt
Status:
https://datatracker.ietf.org/doc/draft-sarikaya-dhc-dhcpv6-raoptions-sadr/
Htmlized:
http://tools.ietf.org/html/draft-sarikaya-dhc-dhcpv6-raoptions-sadr-00


Abstract:
   This document describes DHCPv6 Route Options for provisioning IPv6
   routes on DHCPv6 client nodes for source address dependent routing.
   Using these options, an operator can configure multi-homed nodes
   where other means of route configuration may be impractical.


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Hi Ole,

On 06/20/2014 08:46 AM, Ole Troan wrote:
>
>> My impression from the discussion in London that the consensus was closer to (2) than (1) - that on such links the hosts should be allowed to restart transmissions in a reasonable / rate-limited manner, when connectivity parameters expire. And that we should add MAY text for that.
>
> that's also fine with me. if there was a text proposal it would most likely be easier for the working group to come to a decision.
> is that something the authors can take on?

In my view, the text in the draft already reflects something akin to 
what Dmitry was talking about (but not exactly option 2 from your 
original mail on this thread). This is the relevant text from the draft.

Hosts MAY continue retransmitting the RSs even after router discovery is 
successful.  If the host continues to retransmit RSs, it is RECOMMENDED 
that such retransmissions be rate-limited to one every MRT.

Cheers
Suresh



From nobody Fri Jun 20 18:29:59 2014
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From: Bob Hinden <bob.hinden@gmail.com>
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Subject: 6MAN WG Last Call: <draft-ietf-6man-why64-01.txt>
Date: Fri, 20 Jun 2014 18:16:38 -0700
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This message starts a two week 6MAN Working Group on advancing:

       Title           : Analysis of the 64-bit Boundary in IPv6 =
Addressing
       Authors         : Brian Carpenter
                         Tim Chown
                         Fernando Gont
                         Sheng Jiang
                         Alexandru Petrescu
                         Andrew Yourtchenko
	Filename        : draft-ietf-6man-why64-01.txt
	Pages           : 23
	Date            : 2014-05-07

        http://tools.ietf.org/html/draft-ietf-6man-why64-01.txt

as an Informational RFC.  Substantive comments and statements of support =
for publishing this document should be directed to the mailing list.  =
Editorial suggestions can be sent to the authors.  This last call will =
end on July 4, 2014.

Regards,

Bob Hinden & Ole Tr=F8an


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From nobody Thu Jun 26 06:31:49 2014
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From: <mohamed.boucadair@orange.com>
To: "ipv6@ietf.org" <ipv6@ietf.org>
Subject: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
Thread-Topic: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Date: Thu, 26 Jun 2014 13:16:12 +0000
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Dear all,

We submitted a short draft that calls explicitly for a recommendation to un=
link routing/forwarding and IPv6 prefix semantic.

The draft is available at:
https://datatracker.ietf.org/doc/draft-boucadair-6man-prefix-routing-reco/?=
include_text=3D1


6man Working Group                                          M. Boucadair
Internet-Draft                                            France Telecom
Intended status: Standards Track                             A. Petrescu
Expires: December 28, 2014                                     CEA, LIST
                                                           June 26, 2014

        IPv6 Prefix Length Recommendation for Routing Protocols
              draft-boucadair-6man-prefix-routing-reco-01

Abstract

   The length of IP prefixes to be manipulated by forwarding and routing
   processes is policy-based; no maximum length must be assumed by
   design.  This document sketches a recommendation to be followed by
   forwarding and routing designs with regards to the prefix length.
   The aim is to avoid hard-coded routing and forwarding designs that
   exclude some IP prefix lengths.


Comments are more welcome.

Cheers,
Med

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<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Dear all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">We submitted a short draft that calls explicitly for a rec=
ommendation to unlink routing/forwarding and IPv6 prefix semantic.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">The draft is available at:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><a href=3D"https://datatracker.ietf.org/doc/draft-boucadai=
r-6man-prefix-routing-reco/?include_text=3D1">https://datatracker.ietf.org/=
doc/draft-boucadair-6man-prefix-routing-reco/?include_text=3D1</a>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">6man Working Group&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; M. Boucadair<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Internet-Draft&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; France Tel=
ecom<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Intended status: Standards Track&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. Petr=
escu<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Expires: December 28, 2014&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CEA, LIST<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; June 26, =
2014<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; IPv6 Prefix Len=
gth Recommendation for Routing Protocols<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp; draft-boucadair-6man-prefix-routing-reco-01<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Abstract<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; The length of IP prefixes to be manipulated b=
y forwarding and routing<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; processes is policy-based; no maximum length =
must be assumed by<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; design.&nbsp; This document sketches a recomm=
endation to be followed by<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; forwarding and routing designs with regards t=
o the prefix length.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; The aim is to avoid hard-coded routing and fo=
rwarding designs that<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; exclude some IP prefix lengths.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Comments are more welcome.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">Med<o:p></o:p></span></p>
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From nobody Thu Jun 26 07:34:52 2014
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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "ipv6@ietf.org" <ipv6@ietf.org>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
Thread-Topic: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Date: Thu, 26 Jun 2014 13:59:11 +0000
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Mohamed, Alexander,

I like the idea of your I-D.

Some quick comments if you do not mind:

  *   the paragraph about prefix length of 0, does not bring any added valu=
e IMHO
  *   In the recommendation:
     *   Minor comment: the 64-bit boundary is for SLAAC-enabled medium not=
 only for end-user prefix assignments :-)
     *   More seriously, and while working for a vendor, please note that I=
 am not a HW designer of any kind!, requesting routers not to restrict to a=
ny length (including longer than /64) can have either a performance impact =
(such as double look-up 64-bit by 64-bit) or a huge $$$ and kW/h cost. May =
I suggest to amend the text by adding any prefix length between 0 and 64 (f=
ull performance) and 128 (with perhaps a performance hit)?
     *   When I read your text, I am confused by the 'routing protocols' (B=
GP, OSPF which obviously do not care about prefix length =97 except for num=
ber of entries in RIB) and 'forwarding' (which is probably FIB =3D HW where=
 the prefix length has an impact =97 see above). May I suggest to split the=
 discussion into two parts? Or restrict it to forwarding?

En esp=E9rant vous aider :)

-=E9ric

From: "mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com>" <=
mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com>>
Date: jeudi 26 juin 2014 15:16
To: "ipv6@ietf.org<mailto:ipv6@ietf.org>" <ipv6@ietf.org<mailto:ipv6@ietf.o=
rg>>
Subject: IPv6 Prefix Length Recommendation for Routing Protocols (draft-bou=
cadair-6man-prefix-routing-reco)

Dear all,

We submitted a short draft that calls explicitly for a recommendation to un=
link routing/forwarding and IPv6 prefix semantic.

The draft is available at:
https://datatracker.ietf.org/doc/draft-boucadair-6man-prefix-routing-reco/?=
include_text=3D1


6man Working Group                                          M. Boucadair
Internet-Draft                                            France Telecom
Intended status: Standards Track                             A. Petrescu
Expires: December 28, 2014                                     CEA, LIST
                                                           June 26, 2014

        IPv6 Prefix Length Recommendation for Routing Protocols
              draft-boucadair-6man-prefix-routing-reco-01

Abstract

   The length of IP prefixes to be manipulated by forwarding and routing
   processes is policy-based; no maximum length must be assumed by
   design.  This document sketches a recommendation to be followed by
   forwarding and routing designs with regards to the prefix length.
   The aim is to avoid hard-coded routing and forwarding designs that
   exclude some IP prefix lengths.


Comments are more welcome.

Cheers,
Med

--_000_CFD1F1E91F820evynckeciscocom_
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252">
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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif; ">
<div>Mohamed, Alexander,</div>
<div><br>
</div>
<div>I like the idea of your I-D.</div>
<div><br>
</div>
<div>Some quick comments if you do not mind:</div>
<ul>
<li>the paragraph about prefix length of 0, does not bring any added value =
IMHO</li><li>In the recommendation:
<ul>
<li>Minor comment: the 64-bit boundary is for SLAAC-enabled medium not only=
 for end-user prefix assignments :-)</li><li>More seriously, and while work=
ing for a vendor, please note that I am not a HW designer of any kind!, req=
uesting routers not to restrict to any length (including longer than /64) c=
an have either a performance impact (such as double look-up 64-bit by 64-bi=
t)
 or a huge $$$ and kW/h cost. May I suggest to amend the text by adding any=
 prefix length between 0 and 64 (full performance) and 128 (with perhaps a =
performance hit)?</li><li>When I read your text, I am confused by the 'rout=
ing protocols' (BGP, OSPF which obviously do not care about prefix length =
=97 except for number of entries in RIB) and 'forwarding' (which is probabl=
y FIB =3D HW where the prefix length has an impact =97 see above).
 May I suggest to split the discussion into two parts? Or restrict it to fo=
rwarding?</li></ul>
</li></ul>
<div>En esp=E9rant vous aider :)</div>
<div><br>
</div>
<div>-=E9ric</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
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<span style=3D"font-weight:bold">From: </span>&quot;<a href=3D"mailto:moham=
ed.boucadair@orange.com">mohamed.boucadair@orange.com</a>&quot; &lt;<a href=
=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com</a>&g=
t;<br>
<span style=3D"font-weight:bold">Date: </span>jeudi 26 juin 2014 15:16<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:ipv6@ie=
tf.org">ipv6@ietf.org</a>&quot; &lt;<a href=3D"mailto:ipv6@ietf.org">ipv6@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>IPv6 Prefix Length Recomme=
ndation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)<br=
>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Dear all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">We submitted a short draft that calls explicitly for a recommenda=
tion to unlink routing/forwarding and IPv6 prefix semantic.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">The draft is available at:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><a href=3D"https://datatracker.ietf.org/doc/draft-boucadair-6man-=
prefix-routing-reco/?include_text=3D1">https://datatracker.ietf.org/doc/dra=
ft-boucadair-6man-prefix-routing-reco/?include_text=3D1</a><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">6man Working Group&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; M. Boucadair<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Internet-Draft&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; France Telecom<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Intended status: Standards Track&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. Petrescu<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Expires: December 28, 2014&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; CEA, LIST<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; June 26, 2014<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; IPv6 Prefix Length Rec=
ommendation for Routing Protocols<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp; draft-boucadair-6man-prefix-routing-reco-01<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Abstract<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; The length of IP prefixes to be manipulated by forwa=
rding and routing<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; processes is policy-based; no maximum length must be=
 assumed by<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; design.&nbsp; This document sketches a recommendatio=
n to be followed by<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; forwarding and routing designs with regards to the p=
refix length.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; The aim is to avoid hard-coded routing and forwardin=
g designs that<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">&nbsp;&nbsp; exclude some IP prefix lengths.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Comments are more welcome.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; "><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10pt; font-family: 'Courie=
r New'; ">Med<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_CFD1F1E91F820evynckeciscocom_--


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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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I do not see a need for this document.  It is a re-statement of CIDR.  Wh=
y?

Regards,
Brian


On 6/26/14 9:16 AM, mohamed.boucadair@orange.com wrote:
> Dear all,
>=20
> We submitted a short draft that calls explicitly for a recommendation t=
o unlink routing/forwarding and IPv6 prefix semantic.
>=20
> The draft is available at:
> https://datatracker.ietf.org/doc/draft-boucadair-6man-prefix-routing-re=
co/?include_text=3D1
>=20
>=20
> 6man Working Group                                          M. Boucadai=
r
> Internet-Draft                                            France Teleco=
m
> Intended status: Standards Track                             A. Petresc=
u
> Expires: December 28, 2014                                     CEA, LIS=
T
>                                                            June 26, 201=
4
>=20
>         IPv6 Prefix Length Recommendation for Routing Protocols
>               draft-boucadair-6man-prefix-routing-reco-01
>=20
> Abstract
>=20
>    The length of IP prefixes to be manipulated by forwarding and routin=
g
>    processes is policy-based; no maximum length must be assumed by
>    design.  This document sketches a recommendation to be followed by
>    forwarding and routing designs with regards to the prefix length.
>    The aim is to avoid hard-coded routing and forwarding designs that
>    exclude some IP prefix lengths.
>=20
>=20
> Comments are more welcome.
>=20
> Cheers,
> Med
>=20
>=20
>=20
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
>=20


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From nobody Thu Jun 26 14:39:25 2014
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From: Randy Bush <randy@psg.com>
To: Eric Vyncke <evyncke@cisco.com>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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> More seriously, and while working for a vendor, please note that I am
> not a HW designer of any kind!, requesting routers not to restrict to
> any length (including longer than /64) can have either a performance
> impact (such as double look-up 64-bit by 64-bit) or a huge $$$ and
> kW/h cost. May I suggest to amend the text by adding any prefix length
> between 0 and 64 (full performance) and 128 (with perhaps a
> performance hit)?

details of performance assumptions of cover-the-v6-rfp-check-mark vendor
implementations are not needed or helpful.  we hope that some day
vendors will support ipv6 as a first class citizen.

randy


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From: "Fred Baker (fred)" <fred@cisco.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
Thread-Topic: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Hmm.
>    It is fundamental to not link routing and forwarding to the IPv6
>    prefix/address semantic [RFC4291].  This document includes a
>    recommendation for that aim.

Is that anything like =93The IPv6 prefix in [RFC4291] is a CIDR prefix, =
and should be treated accordingly; the 64 bit prefix length is not a =
=93class=94 in the sense of RFC 791 addresses, but an addressing =
convention useful to [SLAAC].=94?

My private opinion, which is just that - an opinion - is that address =
formats such as described on RFC 4291 are an artifact of the LAN =
technologies that they apply to. Instead of extending a 48 bit MAC =
address to 64 bits on Ethernet and using a 64 bit IID on LANs that use a =
64 bit MAC address, I might have suggested using a 48 bit IID on an =
Ethernet and a 64 bit IID on other LANs when appropriate. It=92s not =
like we mix MAC address lengths on the same LAN.

And then there=92s the question of privacy addresses. Again, the privacy =
address should be 128-n bits long, where n is the length of the LAN=92s =
prefix announced in the RA.

But I=92m obviously an appropriate person to burn at the stake, and the =
working group is much wiser than I am.

> 2.  Recommendation
>=20
>    Forwarding and routing protocols MUST NOT restrict by design the
>    length of IPv6 prefixes.  In particular, forwarding and routing
>    processes MUST be designed to accept prefixes of any length up to
>    /128, by increments of 1.

See above on CIDR.=20

>    Certain lookup algorithm implementations (find the prefix matching =
a
>    given destination address) may be affected by this recommentation,
>    and more so in IPv6 than in IPv4.  Some implementations may prove
>    less well performing when prefix lengths are above 64 (e.g. see
>    discussion by F.  Baker and 6MAN WG members at http://www.ietf.org/
>    mail-archive/web/ipv6/current/msg20633.html)

Two issues with the statement.

1) F Baker is a member of 6man as much as anyone else is. If you want to =
point to a thread, I suggest you point to a thread.

2) more to the point, I might suggest you point to commonly used chips =
such as Broadcom=92s that limit operational deployability by making this =
assumption, rather than to ephemeral email threads.

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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Randy Bush <randy@psg.com>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
Thread-Topic: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Randy

	> details of performance assumptions of cover-the-v6-rfp-check-mark vendor
	> implementations are not needed or helpful.  we hope that some day
	> vendors will support ipv6 as a first class citizen.


If you do not mind a direct, non-educated reply, then I will add "when
customers will be ready to pay for IPv6 as a first class citizen?"

Joke/irony on the side, you and I and many many others (individuals,
customers, vendors) want to have IPv6 because it is the only way forward
for all of us and all Internet users. And, again with a lack of HW
expertise (my electronics examination is still a nightmare for me), I am
afraid that physics does not care about the usefulness/need of IPv6... If
a chip needs ??? times more gates to process a prefix length of 120 bits
at wire speed than a <=3D 64 prefix length (again a guess), then there is
not choice but adding more gates, i.e. more $$$ and more kW/h.

I would hope so much that cost does not care... Then I would really love
to have any prefix size being forwarded at the same speed on all Internet
routers... BTW, this would require to have _ALL_ residential CPE to have a
128-bit x86 processor.

-=E9ric-the-dumb-engineer

PS: I hate to write as a simple engineer from a vendor, but, let's be
honest... On BOTH sides
PS2: I do not know where IPv6@ietf.org has been nicknamed as "IPv6
Deployment Prevention <ipv6@ietf.org>" ;-)

On 26/06/14 23:39, "Randy Bush" <randy@psg.com> wrote:

>> More seriously, and while working for a vendor, please note that I am
>> not a HW designer of any kind!, requesting routers not to restrict to
>> any length (including longer than /64) can have either a performance
>> impact (such as double look-up 64-bit by 64-bit) or a huge $$$ and
>> kW/h cost. May I suggest to amend the text by adding any prefix length
>> between 0 and 64 (full performance) and 128 (with perhaps a
>> performance hit)?
>
>details of performance assumptions of cover-the-v6-rfp-check-mark vendor
>implementations are not needed or helpful.  we hope that some day
>vendors will support ipv6 as a first class citizen.
>
>randy


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From: Randy Bush <randy@psg.com>
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> 2) more to the point, I might suggest you point to commonly used chips
> such as Broadcom=E2=80=99s that limit operational deployability by making=
 this
> assumption, rather than to ephemeral email threads.

i have sympathy for your feeling stung.  but as an operator, i hope
broadcom's limitiations, like other vendors', will also be ephemeral.

randy


From nobody Thu Jun 26 15:46:55 2014
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From: Randy Bush <randy@psg.com>
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> If you do not mind a direct, non-educated reply, then I will add "when
> customers will be ready to pay for IPv6 as a first class citizen?"

in the late '90s, when no vendor supported ipv6, we deployed a multi-
continent parallel frelling network, yes circuits, using bsd and kame
code (of which our lab was a key developer (remember itojun)) to deliver
ipv6 to customers.  so you are telling the wrong folk to put money where
ipv6 mouth is.

we waited years for even half-assed dual-stack support from vendors.

so excuse if i take crying on shoulders as more like biting. :)

randy


From nobody Thu Jun 26 15:53:15 2014
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On 2014-06-26 15:46, Randy Bush wrote:
>> If you do not mind a direct, non-educated reply, then I will add "when
>> customers will be ready to pay for IPv6 as a first class citizen?"

Various vendors have been charging EXTRA for the magical "IPv6 enabling
license" on their products for almost a decade already.

Indeed, time that that becomes a default option and not only an extra addon.

> in the late '90s, when no vendor supported ipv6, we deployed a multi-
> continent parallel frelling network, yes circuits, using bsd and kame
> code (of which our lab was a key developer (remember itojun)) to deliver
> ipv6 to customers.  so you are telling the wrong folk to put money where
> ipv6 mouth is.
> 
> we waited years for even half-assed dual-stack support from vendors.
> 
> so excuse if i take crying on shoulders as more like biting. :)

Thank you Randy for stating what needs to be stated.

Welcome to 2014 people of the IPv6 list!

Native IPv6 deployment has been happen for more than 15 years now, with
and without the help of the "larger" vendors.

IPv6 inclusiveness was one of the many reasons why quite a few people
moved to Vendor J a decade ago...

Greets,
 Jeroen


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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
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>we waited years for even half-assed dual-stack support from vendors.

Back in the early 2000... And some vendors were earlier than others... Now
all vendors are mostly ready, waiting for customers ;-) (sorry could not
help but writing this)

>
>so excuse if i take crying on shoulders as more like biting. :)

Back to yesterday or the day before (I am not a soccer fan...)

-=E9ric-looking-forward-for-US-vs-Belgium :-)

>
>randy


From nobody Thu Jun 26 17:48:58 2014
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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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After all the discussions / documents around SLAAC and u/g bit significance a=
nd then RFC6164, I had a feeling that this type of draft would be in the mak=
ing somewhere :)
The longest prefix match from a routing perspective works best for many reas=
ons and therefore I would support the recommendation in this draft as there s=
hould be no need to change the routing behaviour between v4 and v6=


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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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On Thu, 2014-06-26 at 13:16 +0000, mohamed.boucadair@orange.com wrote:
> Dear all,
> 
>  
> 
> We submitted a short draft that calls explicitly for a recommendation
> to unlink routing/forwarding and IPv6 prefix semantic. 

[snip]

What problem is this draft trying to solve?

// Steve


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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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>> We submitted a short draft that calls explicitly for a recommendation
>> to unlink routing/forwarding and IPv6 prefix semantic.
> What problem is this draft trying to solve?

a whack-a-mole that keeps saying /64 is special for things other than
slaac.

notice a number of ops folk all like it.  we hit the excuses and
confusion more often than you may imagine.

conversely, what is it that bothers you about it?

randy


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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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> >> We submitted a short draft that calls explicitly for a recommendation
> >> to unlink routing/forwarding and IPv6 prefix semantic.
> > What problem is this draft trying to solve?
> 
> a whack-a-mole that keeps saying /64 is special for things other than
> slaac.

For instance, we've had people claiming that CIDR was only meant to 
apply to the first 64 bits.

Steinar Haug, AS 2116


From nobody Fri Jun 27 05:53:18 2014
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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Hi Eric,

Thanks for the reply.

Le 26/06/2014 15:59, Eric Vyncke (evyncke) a écrit :
> Mohamed, Alexander,
>
> I like the idea of your I-D.
>
> Some quick comments if you do not mind:
>
>   * the paragraph about prefix length of 0, does not bring any added
>     value IMHO

The intention was to be explicit about the corner cases of the prefix 
length (0, 1, 127, 128).

It is true that the meaning 'default route' implied by a prefix length 0 
has not much impact on the recommendation that routing and forwarding 
happens on arbitrary prefix length values.  As such that paragraph could 
be eliminated.


>   * In the recommendation:
>       o Minor comment: the 64-bit boundary is for SLAAC-enabled medium
>         not only for end-user prefix assignments :-)

I would add that whereas it is for SLAAC-enabled media, it is only for 
the IEEE kind of such media.  SLAAC per se works with arbitrary prefix 
lengths, including non-64.  (and I dont have an example of a non-IEEE 
SLAAC media which is not /64).

>       o More seriously, and while working for a vendor, please note that
>         I am not a HW designer of any kind!, requesting routers not to
>         restrict to any length (including longer than /64) can have
>         either a performance impact (such as double look-up 64-bit by
>         64-bit) or a huge $$$ and kW/h cost. May I suggest to amend the
>         text by adding any prefix length between 0 and 64 (full
>         performance) and 128 (with perhaps a performance hit)?

I think this is feasible to amend the text in that sense.  But we would 
need the right text.

>       o When I read your text, I am confused by the 'routing protocols'
>         (BGP, OSPF which obviously do not care about prefix length —
>         except for number of entries in RIB) and 'forwarding' (which is
>         probably FIB = HW where the prefix length has an impact — see
>         above). May I suggest to split the discussion into two parts? Or
>         restrict it to forwarding?

I agree that the most important part of the intention of this draft is 
what you call forwarding.

In the routing protocols part  - right, they are not caring about prefix 
length; they'd typically have prefix length fields containing any  value.

However, there may be some doubts.  E.g. in OSPFv2 packet formats there 
is some form of 64-bit padding, which is obviously not 128bit padding. 
(search "64 bits" in RFC5340).

Maybe other such 64 limitations exist in OSPF and BGP.

Alex

>
> En espérant vous aider :)
>
> -éric
>
> From: "mohamed.boucadair@orange.com
> <mailto:mohamed.boucadair@orange.com>" <mohamed.boucadair@orange.com
> <mailto:mohamed.boucadair@orange.com>>
> Date: jeudi 26 juin 2014 15:16
> To: "ipv6@ietf.org <mailto:ipv6@ietf.org>" <ipv6@ietf.org
> <mailto:ipv6@ietf.org>>
> Subject: IPv6 Prefix Length Recommendation for Routing Protocols
> (draft-boucadair-6man-prefix-routing-reco)
>
>     Dear all,
>
>     We submitted a short draft that calls explicitly for a
>     recommendation to unlink routing/forwarding and IPv6 prefix semantic.
>
>     The draft is available at:
>
>     https://datatracker.ietf.org/doc/draft-boucadair-6man-prefix-routing-reco/?include_text=1
>
>     6man Working Group                                          M. Boucadair
>
>     Internet-Draft                                            France Telecom
>
>     Intended status: Standards Track                             A. Petrescu
>
>     Expires: December 28, 2014                                     CEA, LIST
>
>                                                                 June 26,
>     2014
>
>              IPv6 Prefix Length Recommendation for Routing Protocols
>
>                    draft-boucadair-6man-prefix-routing-reco-01
>
>     Abstract
>
>         The length of IP prefixes to be manipulated by forwarding and
>     routing
>
>         processes is policy-based; no maximum length must be assumed by
>
>         design.  This document sketches a recommendation to be followed by
>
>         forwarding and routing designs with regards to the prefix length.
>
>         The aim is to avoid hard-coded routing and forwarding designs that
>
>         exclude some IP prefix lengths.
>
>     Comments are more welcome.
>
>     Cheers,
>
>     Med
>
>
>
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From nobody Fri Jun 27 05:56:19 2014
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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Le 27/06/2014 00:05, Fred Baker (fred) a écrit :
[...]
>> Certain lookup algorithm implementations (find the prefix matching
>> a given destination address) may be affected by this
>> recommentation, and more so in IPv6 than in IPv4.  Some
>> implementations may prove less well performing when prefix lengths
>> are above 64 ([...] 6MAN WG members
>> at http://www.ietf.org/
>> mail-archive/web/ipv6/current/msg20633.html)
>
> Two issues with the statement.
>
> 1) If you want to point to a thread, I suggest you point to a thread.

Yes, sorry, it was just a sort of reminder.

> 2) more to the point, I might suggest you point to commonly used
> chips such as Broadcom’s that limit operational deployability by
> making this assumption, rather than to ephemeral email threads.

I will look find a reference as example.

Alex

>
>
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From nobody Fri Jun 27 06:35:07 2014
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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>, "ipv6@ietf.org" <ipv6@ietf.org>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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On 27/06/14 14:52, "Alexandru Petrescu" <alexandru.petrescu@gmail.com>
wrote:

>Hi Eric,
>
>Thanks for the reply.
>
>However, there may be some doubts.  E.g. in OSPFv2 packet formats there
>is some form of 64-bit padding, which is obviously not 128bit padding.
>(search "64 bits" in RFC5340).

I was not aware of this specific issue for OSPFv3 (assuming you meant v3
and not v2 :-))

-=E9ric

>


From nobody Fri Jun 27 06:44:40 2014
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Le 27/06/2014 15:35, Eric Vyncke (evyncke) a écrit :
>
>
> On 27/06/14 14:52, "Alexandru Petrescu" <alexandru.petrescu@gmail.com>
> wrote:
>
>> Hi Eric,
>>
>> Thanks for the reply.
>>
>> However, there may be some doubts.  E.g. in OSPFv2 packet formats there
>> is some form of 64-bit padding, which is obviously not 128bit padding.
>> (search "64 bits" in RFC5340).
>
> I was not aware of this specific issue for OSPFv3 (assuming you meant v3
> and not v2 :-))

Hi Eric,

I meant v3 indeed.  I was not aware of it either.  I just opened the RFC 
and looked for "64".  Maybe it is nothing.

Alex

>
> -éric
>
>>
>
>
>



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Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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On Fri, 2014-06-27 at 14:21 +0900, Randy Bush wrote:

> >> We submitted a short draft that calls explicitly for a recommendation
> >> to unlink routing/forwarding and IPv6 prefix semantic.
> > What problem is this draft trying to solve?
> 
> a whack-a-mole that keeps saying /64 is special for things other than
> slaac.
> 
> notice a number of ops folk all like it.  we hit the excuses and
> confusion more often than you may imagine.
> 
> conversely, what is it that bothers you about it?

I would like to think that I can now and forever get a /64 for each of
my LANs.   Every time this topic comes up someone proposes to redesign
SLAAC to allow IID < 64 bits.


Regards,

// Steve


From nobody Fri Jun 27 13:04:23 2014
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From: "Manfredi, Albert E" <albert.e.manfredi@boeing.com>
To: Steven Blake <slblake@petri-meat.com>
Subject: RE: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
Thread-Topic: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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Date: Fri, 27 Jun 2014 20:04:16 +0000
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> From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Steven Blake


> I would like to think that I can now and forever get a /64 for each of
> my LANs.   Every time this topic comes up someone proposes to redesign
> SLAAC to allow IID < 64 bits.

Aren't the two unrelated?

I would like to think that if I get a /64 from an ISP, as many people do, I=
 can create any number of subnets in my home or small office network, witho=
ut breaking everything, and without having to use NAT.

And I would also like to pretend that the rhetoric about the gargantuan add=
ress space in IPv6 is remotely true.

But it's obvious why operators like /64, so I'm not unaware of the simplici=
ty factor. Still, let's not forget that until the IETF says otherwise, this=
 is still just a measure to be used for a small subset of the IPv6 address =
space (12.5 percent), which in principle could be changed in the future if =
necessary.

Bert


From nobody Fri Jun 27 13:51:53 2014
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Date: Sat, 28 Jun 2014 08:52:00 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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To: sthaug@nethelp.no
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
References: <787AE7BB302AE849A7480A190F8B933001F3D6@OPEXCLILM23.corporate.adroot.infra.ftgroup> <1403835459.8569.6.camel@tachyon.blake> <m24mz7c4hu.wl%randy@psg.com> <20140627.103217.74699668.sthaug@nethelp.no>
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On 27/06/2014 20:32, sthaug@nethelp.no wrote:
>>>> We submitted a short draft that calls explicitly for a recommendation
>>>> to unlink routing/forwarding and IPv6 prefix semantic.
>>> What problem is this draft trying to solve?
>> a whack-a-mole that keeps saying /64 is special for things other than
>> slaac.
> 
> For instance, we've had people claiming that CIDR was only meant to 
> apply to the first 64 bits.

Not to mention specific evidence that some products do not
behave correctly for some >64 prefix lengths - see earlier
discussions on the why64 draft.

Logically, this draft is not necessary. Practically, it is,
as a clarification for confused product designers.

   Brian


From nobody Fri Jun 27 15:42:11 2014
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To: "Manfredi, Albert E" <albert.e.manfredi@boeing.com>
From: Mark Andrews <marka@isc.org>
References: <787AE7BB302AE849A7480A190F8B933001F3D6@OPEXCLILM23.corporate.adroot.infra.ftgroup> <1403835459.8569.6.camel@tachyon.blake> <m24mz7c4hu.wl%randy@psg.com> <1403892485.7922.13.camel@tachyon.blake> <021E64FECA7E5A4699562F4E6671648133A3E452@XCH-PHX-503.sw.nos.boeing.com>
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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In message <021E64FECA7E5A4699562F4E6671648133A3E452@XCH-PHX-503.sw.nos.boeing.
com>, "Manfredi, Albert E" writes:
> > From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Steven Blake
> 
> 
> > I would like to think that I can now and forever get a /64 for each of
> > my LANs.   Every time this topic comes up someone proposes to redesign
> > SLAAC to allow IID < 64 bits.
> 
> Aren't the two unrelated?

No.  You can do DHCPv6 or static.
 
> I would like to think that if I get a /64 from an ISP, as many people do, I c
> an create any number of subnets in my home or small office network, without b
> reaking everything, and without having to use NAT.

I would like to think that ISP's would stop being stupid and actually
supply something bigger than a /64.  There has *never* been a good
reason to just supply just a /64 to a customer.  All the address
assignment policies to ISP's assume customers will get more than
/64's.  Usually in the /48 to /56 range.  ISP's that only supply a
/64 are not living up to their end of the bargain.

	* 6RD doesn't force /64's.  It's ISP idiocy that leads to /64 with 6rd.
	* 6to4 does /48 by default.
	* PD doesn't force /64's.

Tunnel brokers hand out more than /64's for nothing

	HE hands out /48's on request.  Just click the button.

If you have broken equipment that can't hand out or accept arbitary
length prefixes it should be replaced.

> And I would also like to pretend that the rhetoric about the gargantuan addre
> ss space in IPv6 is remotely true.
> 
> But it's obvious why operators like /64, so I'm not unaware of the simplicity
>  factor. Still, let's not forget that until the IETF says otherwise, this is 
> still just a measure to be used for a small subset of the IPv6 address space 
> (12.5 percent), which in principle could be changed in the future if necessar
> y.

Handing out a /56 is just as simple as handing out /64.  Be that
with PD, 6rd or static.  Just request the correct amount of space
from your RIR.  ISP's should punishing their customers for their
failure to properly plan.

ISP's are expected to be experts.  Customer's arn't.  Leave customers
with all /64 subnets and twiddle the bits at the ISP end not the
other way around.  It's not like ISP's aren't twiddling bits with
IPv4 anyway.
 
Mark

> Bert
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org


From nobody Sat Jun 28 07:54:51 2014
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From: Randy Bush <randy@psg.com>
To: sthaug@nethelp.no
Subject: Re: IPv6 Prefix Length Recommendation for Routing Protocols (draft-boucadair-6man-prefix-routing-reco)
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>>> What problem is this draft trying to solve?
>> a whack-a-mole that keeps saying /64 is special for things other than
>> slaac.
> For instance, we've had people claiming that CIDR was only meant to 
> apply to the first 64 bits.

some of them had to have tla and nla clawed out of their cold dead
hands.

randy

