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Thread-Topic: [Roll] Proposal so as to reach a consensus on
	**draft-ietf-roll-protocols-survey-02 **
Thread-Index: AcliPQpOIjPxyoQIQgGXwqvnNFlBqQNBfUwQ
References: <7C1A2E64-C1B0-472E-B354-77F290BBC80D@cisco.com><F3A0CE8F-A9A2-43CB-9F75-8010BB22C458@thomasclausen.org><3CEA849E-22CD-4DF1-A56B-E1C38572AA77@cisco.com><6A3B39C4-8126-47D0-B29A-752191F4F487@cs.stanford.edu><5467B083-1300-4723-9B5D-F45D6AED701B@thomasclausen.org><260E044E-1C74-4C4D-9BF4-0A79E1A39177@cisco.com><7F73D017-FBC6-4AB2-9359-78501D90825F@cs.stanford.edu><be8c8d780812180302x3f1d18acp3594dcdd2f750456@mail.gmail.com><2BD0AD28-7D65-4EE8-9D67-999E01671EB6@cs.stanford.edu><be8c8d780812190058s7ea96295s906cd87dd9b64400@mail.gmail.com>
	<44680fe70812191650r233e59c5r8cc652c617eaf989@mail.gmail.com>
From: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
To: "Stephen Dawson-Haggerty" <stevedh@eecs.berkeley.edu>,
	"Emmanuel Baccelli" <Emmanuel.Baccelli@inria.fr>
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Cc: ROLL WG <roll@ietf.org>
Subject: Re: [Roll] Proposal so as to reach a consensus on
	**draft-ietf-roll-protocols-survey-02 **
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>  - OLSRv2 changed to ? in the control cost metric, because it might be
possible to pass=20
> with the right sort of aging of updates. ("Fisheye State Routing in
Mobile Ad Hoc Networks").=20
=20
I think there are two components here, Fisheye (which is a sort of -
very loosely - backing off in space),
and backing off in time. Each allows a potential overhead vs.
performance tradeoff. (The tradeoff
depending on mobility, density, and all the other usual things.)
=20
>  It would almost certainly require a new specification to say how to
do this in a correct and=20
>  inoperable way, but might not violate the specification.=20
=20
OLSrv2 as-is already permits both, and interoperably. But how you might
choose to use it, and what
the costs and benefits might be, are up to the operator. (I suspect the
draft may need more work
on explaining that this is available.)
=20
As a simpler case of this permission to do what you want, and
interoperate, consider the
more common fixed beacon time HELLO messages. (Actually even that isn't
the norm,
because of jitter and responses to topology changes, but for now let's
ignore those.)
Different nodes can use a different beacon period, and (provided they
also set their validity
times to match) can interoperate. But it's up to the user/operator to
decide if 2 seconds
(the suggested default) is good, or should it be 20 seconds or 0.2
second? But it's the
same analogy - the protocol supports, but doesn't define how to use the
flexibility. (It
also allows seprate decentralised decisions, so nodes can be using
different values -
or different strategies in the broader case - but doesn't exclude a
coordinated approach
set by some sort of policy.)
=20
>  manet-fsr-00 seems like it has not been updated in quite a while.=20
=20
It's the Fisheye concept (also used in Fuzzy/Hazy Sighted Link State
routing - and I
don't know about the relative timing of each as originating the concept)
that is available
in OLSRv2, not the actual FSR protocol. As I recall, there's an IEEE
paper by the FSR
authors that I'd actually use as my basic reference rather than the FSR
ID, and a
FSLS/HSLS paper likewise. (HSLS is, I think, clearest on permitted
patterns of hop
count usage that give regular periods at each distance, something also
advised in the
OLSRv2 draft.)
=20
 >  FSR does not alter the "table scalability "; it's not claimed in the
paper.=20
=20
I'd have to check which one that is. If it's the routing table size one,
then no, it doesn't.
(There are some partially speculative, and partially incomplete, ideas
in this area. But
they are developments, not part of OLSRv2 as-is, or expected to be in
the basic OLSRv2
RFC when we get to that point.)
=20


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<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>&gt;=20
&nbsp;</FONT></SPAN>- OLSRv2 changed to ? in the control cost metric,=
 because it=20
might be possible to pass<SPAN class=3D276303614-05012009><FONT face=
=3DArial=20
color=3D#0000ff size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>&gt;</FONT>&nbsp;</SPAN>with the right sort of aging of updates.=20
("Fisheye State Routing in Mobile Ad Hoc Networks").<SPAN=20
class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>I=20
think there are two components here, Fisheye (which is a sort of - very=
 loosely=20
- backing off in space),</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>and=20
backing off in time. Each allows a potential overhead vs. performance=
 tradeoff.=20
(The tradeoff</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>depending on mobility, density, and all the other usual=20
things.)</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>&gt;=20
&nbsp;</FONT></SPAN>It would almost certainly require a new specification=
 to say=20
how to do this in a correct and<SPAN class=3D276303614-05012009><FONT face=
=3DArial=20
color=3D#0000ff size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>&gt;=20
</FONT>&nbsp;</SPAN>inoperable way, but might not violate the=20
specification.<SPAN class=3D276303614-05012009><FONT face=3DArial color=
=3D#0000ff=20
size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>OLSrv2=20
as-is already permits both, and interoperably. But how you might choose to=
 use=20
it, and what</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>the=20
costs and benefits might be, are up to the operator. (I suspect the draft=
 may=20
need more work</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>on=20
explaining that this is available.)</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>As a=20
simpler case of this permission to do what you want, and interoperate,=
 consider=20
the</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>more=20
common fixed beacon time HELLO messages. (Actually even that isn't the=20
norm,</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>because of jitter and responses to topology changes, but for now=
 let's=20
ignore those.)</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>Different nodes can use a different beacon period, and (provided=
 they=20
also set their validity</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>times=20
to match) can interoperate. But it's up to the user/operator to decide if 2=
=20
seconds</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>(the=20
suggested default) is good, or should it be 20 seconds or 0.2 second? But=
 it's=20
the</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>same=20
analogy - the protocol supports, but doesn't define how to use the=
 flexibility.=20
(It</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>also=20
allows seprate decentralised decisions, so nodes can be using different=
 values=20
-</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>or=20
different strategies in the broader case - but doesn't exclude a=
 coordinated=20
approach</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>set by=20
some sort of policy.)</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>&gt;=20
</FONT>&nbsp;</SPAN>manet-fsr-00 seems like it has not been updated in=
 quite a=20
while.<SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>It's=20
the Fisheye concept (also used in Fuzzy/Hazy Sighted Link State routing -=
 and=20
I</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>don't=20
know about the relative&nbsp;timing of each as originating the concept)=
 that is=20
available</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>in=20
OLSRv2, not the actual FSR protocol. As I recall, there's an IEEE paper by=
 the=20
FSR</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>authors&nbsp;that I'd </FONT></SPAN><SPAN class=
=3D276303614-05012009><FONT=20
face=3DArial color=3D#0000ff size=3D2>actually use as my basic reference=
 rather than=20
the FSR ID, and a</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>FSLS/HSLS paper likewise. (HSLS is, I think,&nbsp;clearest on=
 permitted=20
patterns of hop</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>count=20
usage that give regular periods at each distance, something also advised in=
=20
the</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>OLSRv2=20
draft.)</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=20
size=3D2>&nbsp;&gt; &nbsp;</FONT></SPAN>FSR does not alter the "table=
 scalability=20
"; it's not claimed in the paper.<SPAN class=3D276303614-05012009><FONT=
 face=3DArial=20
color=3D#0000ff size=3D2>&nbsp;</FONT></SPAN></DIV>
<DIV><SPAN class=3D276303614-05012009></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D276303614-05012009><FONT face=3DArial color=3D#0000ff=
 size=3D2>I'd=20
have to check which one that is. If it's the routing table size one, then=
 no, it=20
doesn't.</FONT></SPAN></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN class=
=3D276303614-05012009>(There=20
are some partially speculative, and partially incomplete, ideas in this=
 area.=20
But</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN class=
=3D276303614-05012009>they=20
are developments, not part of OLSRv2 as-is, or expected to be in the basic=
=20
OLSRv2</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN class=
=3D276303614-05012009>RFC=20
when we get to that point.)</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D276303614-05012009></SPAN></FONT>&nbsp;</DIV></BODY></HTML>

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	**draft-ietf-roll-protocols-survey-02 **
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "Philip Levis" <pal@cs.stanford.edu>,
	"Emmanuel Baccelli" <Emmanuel.Baccelli@inria.fr>
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Cc: ROLL WG <roll@ietf.org>
Subject: Re: [Roll] Proposal so as to reach a consensus on
	**draft-ietf-roll-protocols-survey-02 **
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Hi Phil:

http://tools.ietf.org/html/draft-thubert-tree-discovery is about structurin=
g a mesh of mobile routers. =


Tunnels and nested tunnel optimization come later in the process iff NEMO i=
s to be used over that mesh.
NINA can also be added to advertise routes down the tree and enable a minim=
al routing within the mesh.

Quoting the abstract: =


"  This paper describes a simple distance vector protocol that exposes
   only a default route towards the infrastructure in a nested NEMO
   configuration.
"

In nested NEMO, the exit point to the infrastructure plays a role that is v=
ery similar to the sink in WSNs. =

For that reason, TD could play a role in the solution space for ROLL, once =
we have re-chartered for that work.

Have a great year,

Pascal

-----Original Message-----
From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On Behalf Of Phi=
lip Levis
Sent: samedi 20 d=E9cembre 2008 02:04
To: Emmanuel Baccelli
Cc: ROLL WG
Subject: Re: [Roll] Proposal so as to reach a consensus on **draft-ietf-rol=
l-protocols-survey-02 **


On Dec 19, 2008, at 12:58 AM, Emmanuel Baccelli wrote:

>
>
> Emmanuel, did you read the rest of my message? I address NEMO/DTN on  =

> point 2. Please acknowledge.
>
>
> Here are some relevant pointers (non-exhaustive list):
>
> http://tools.ietf.org/html/draft-irtf-dtnrg-prophet-01

This one doesn't fit the requirement of "mature draft."

> http://tools.ietf.org/html/draft-thubert-tree-discovery-06

This is a multi-tunneling protocol across multiple in a nest NEMO  =

environment. You're right, we should at least mention why this is not  =

included.


>
> They are in scope (NEMO space and DTN space) and they are describing  =

> routing protocols that may be of interest for ROLL.




>
> If we just add the line you proposed, there will be no justification  =

> why they are not evaluated. Do you agree?
>
> So we have a choice to make: either
> (i) justify why such routing approaches are not in scope, or
> (ii) evaluate a couple of such protocols in the draft, so as to  =

> partially cover DTN and NEMO spaces, as the charter indicates.
>
> I suppose the latter wouldn't take so long? It's just a couple of  =

> additional paragraphs and a couple of additional lines in the pass/ =

> fail table, like for the protocols already evaluated in the draft...  =

> Do you agree?
>

I agree that we need to say something more in depth about the above  =

NEMO draft. Do you agree that the DTN one does not satisfy the  =

requirement?

Phil
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Thread-Topic: [Roll] FW: New Version Notification for
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
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Hi:

To very clear on changes involving MUST and SHOULDs in the latest
industrial requirements draft;

1) The first change clarifies the load balancing requirement:

"The routing protocol MUST be able to compute paths	 	   =

towards different destinations so as to perform load balancing across		=

a variety of paths.		=

"
became
"
The routing protocol MUST be able to compute paths of	=

not-necessarily-equal cost toward a given destination so as to enable	=

load balancing across a variety of paths. =

"


2) And the second change details the "autonomicity" requirement:

"	 		=

								Therefore, the
routing protocol MUST support auto-provisioning of field devices.	=

"
Became
"			=

									The routing	=

MAY require commissioning of information about the node itself, like	=

identity, security tokens, radio standards and frequencies, etc. The	=

routing protocol SHOULD NOT require to preprovision information about	=

the environment where the node will be deployed. The routing	=

protocol MUST enable the full discovery and setup of the environment	=

(available links, selected peers, reachable network).
"
that is the need for the device to discover and adapt to its environment.

:)

Pascal

-----Original Message-----
From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On Behalf Of Pas=
cal Thubert (pthubert)
Sent: vendredi 19 d=E9cembre 2008 08:33
To: roll@ietf.org
Subject: [Roll] FW: New Version Notification fordraft-ietf-roll-indus-routi=
ng-reqs-03

Hi:

We just published a new version (03) of the ROLL industrial routing reqs.
Some language was clarified to address off-list comments, in particular aro=
und MUSTs and SHOULDs. =

We clarified the requirement for "autonomicity", that is the need for the d=
evice to discover and adapt to its environment.

Have a great season,

Pascal
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On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:

>
>
> On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis <pal@cs.stanford.edu>  
> wrote:
>
> On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
>
> "analyze the scaling and characteristics of
> existing protocols and identify whether or not they meet the routing
> requirements of the applications identified above"
>
> If a protocol is not a routing protocol, then it can't meet the  
> routing requirements.
>
>
> Let's look at one example I was pointing to, the beginning of the  
> abstract of http://tools.ietf.org/html/draft-thubert-tree- 
> discovery-06 which reads:
>
> "This paper describes a simple distance vector protocol that exposes
> only a default route towards the infrastructure in a nested NEMO
> configuration."
>
> if this is not a routing protocol, what is it? If this is not in  
> scope, then I wonder what is.
>
> By the way, I'm sure you'll agree that it makes more sense to  
> evaluate this than to evaluate OSPF, in the context of ROLL...
>
> Maybe the next version of the draft will contain a convincing  
> explanation for these choices, but for now, I must say it still  
> eludes me.

You're right; it is a routing protocol. However, it only maintains a  
default route. It does not provide sufficient mechanisms for two nodes  
within an L2N to communicate. So I guess it's *technically* a routing  
protocol, but not in the sense that the draft is concerned with. Do  
you agree that the protocol described in draft-thubert-tree- 
discovery-06 would require additional mechanisms to support routing  
within an L2N?

Phil 
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On Jan 6, 2009, at 6:46 PM, Philip Levis wrote:

>
> On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:
>
>>
>>
>> On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis  
>> <pal@cs.stanford.edu> wrote:
>>
>> On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
>>
>> "analyze the scaling and characteristics of
>> existing protocols and identify whether or not they meet the routing
>> requirements of the applications identified above"
>>
>> If a protocol is not a routing protocol, then it can't meet the  
>> routing requirements.
>>
>>
>> Let's look at one example I was pointing to, the beginning of the  
>> abstract of http://tools.ietf.org/html/draft-thubert-tree-discovery-06 
>>  which reads:
>>
>> "This paper describes a simple distance vector protocol that exposes
>> only a default route towards the infrastructure in a nested NEMO
>> configuration."
>>
>> if this is not a routing protocol, what is it? If this is not in  
>> scope, then I wonder what is.
>>
>> By the way, I'm sure you'll agree that it makes more sense to  
>> evaluate this than to evaluate OSPF, in the context of ROLL...
>>
>> Maybe the next version of the draft will contain a convincing  
>> explanation for these choices, but for now, I must say it still  
>> eludes me.
>
> You're right; it is a routing protocol. However, it only maintains a  
> default route. It does not provide sufficient mechanisms for two  
> nodes within an L2N to communicate. So I guess it's *technically* a  
> routing protocol, but not in the sense that the draft is concerned  
> with. Do you agree that the protocol described in draft-thubert-tree- 
> discovery-06 would require additional mechanisms to support routing  
> within an L2N?

note that the aim of this I-D is not to evaluate individual submission  
(yet)

Cheers.

JP.

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

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Hi Phil, happy new year.

On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <pal@cs.stanford.edu> wrote:

>
> On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:
>
>
>>
>> On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis <pal@cs.stanford.edu>
>> wrote:
>>
>> On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
>>
>> "analyze the scaling and characteristics of
>> existing protocols and identify whether or not they meet the routing
>> requirements of the applications identified above"
>>
>> If a protocol is not a routing protocol, then it can't meet the routing
>> requirements.
>>
>>
>> Let's look at one example I was pointing to, the beginning of the abstract
>> of http://tools.ietf.org/html/draft-thubert-tree-discovery-06 which
>> reads:
>>
>> "This paper describes a simple distance vector protocol that exposes
>> only a default route towards the infrastructure in a nested NEMO
>> configuration."
>>
>> if this is not a routing protocol, what is it? If this is not in scope,
>> then I wonder what is.
>>
>> By the way, I'm sure you'll agree that it makes more sense to evaluate
>> this than to evaluate OSPF, in the context of ROLL...
>>
>> Maybe the next version of the draft will contain a convincing explanation
>> for these choices, but for now, I must say it still eludes me.
>>
>
> You're right; it is a routing protocol. However, it only maintains a
> default route. It does not provide sufficient mechanisms for two nodes
> within an L2N to communicate. So I guess it's *technically* a routing
> protocol, but not in the sense that the draft is concerned with. Do you
> agree that the protocol described in draft-thubert-tree-discovery-06 would
> require additional mechanisms to support routing within an L2N?
>
> Phil



I thought that ROLL routing was about something more specific than MANET
routing? The way I understood it, the difference was basically: ROLL cares
about identified, simplistic traffic patterns. Judging from what you say, I
am wondering what is then, in your mind, the difference?

If there is no difference between ROLL routing and MANET routing other than
"ROLL wants to do exactly the same thing as MANET, only with 5 bytes of RAM
and 1 byte-per-second of control traffic", then this is interesting
research, but this is not ready for the IETF. MANET already has cared about
small "foot-print" solutions for more than a decade, and experience so far
has not given birth to a MANET solution with "5 bytes of RAM and 1
byte-per-second of control traffic". Thus, feasibility within 6 months or a
year (which is the ballpark here, if I am not mistaken?) is not obvious at
all.

If it is not the case, then please explain the difference between ROLL
routing and MANET routing in a better way, in order to stress the
feasibility of the goals.

Emmanuel

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Hi Phil, happy new year.&nbsp;<div><br><br><div class="gmail_quote">On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <span dir="ltr">&lt;<a href="mailto:pal@cs.stanford.edu">pal@cs.stanford.edu</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></div><div class="Wj3C7c"><br>
On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis &lt;<a href="mailto:pal@cs.stanford.edu" target="_blank">pal@cs.stanford.edu</a>&gt; wrote:<br>
<br>
On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:<br>
<br>
&quot;analyze the scaling and characteristics of<br>
existing protocols and identify whether or not they meet the routing<br>
requirements of the applications identified above&quot;<br>
<br>
If a protocol is not a routing protocol, then it can&#39;t meet the routing requirements.<br>
<br>
<br>
Let&#39;s look at one example I was pointing to, the beginning of the abstract of <a href="http://tools.ietf.org/html/draft-thubert-tree-" target="_blank">http://tools.ietf.org/html/draft-thubert-tree-</a>discovery-06 which reads:<br>

<br>
&quot;This paper describes a simple distance vector protocol that exposes<br>
only a default route towards the infrastructure in a nested NEMO<br>
configuration.&quot;<br>
<br>
if this is not a routing protocol, what is it? If this is not in scope, then I wonder what is.<br>
<br>
By the way, I&#39;m sure you&#39;ll agree that it makes more sense to evaluate this than to evaluate OSPF, in the context of ROLL...<br>
<br>
Maybe the next version of the draft will contain a convincing explanation for these choices, but for now, I must say it still eludes me.<br>
</blockquote>
<br></div></div>
You&#39;re right; it is a routing protocol. However, it only maintains a default route. It does not provide sufficient mechanisms for two nodes within an L2N to communicate. So I guess it&#39;s *technically* a routing protocol, but not in the sense that the draft is concerned with. Do you agree that the protocol described in draft-thubert-tree-discovery-06 would require additional mechanisms to support routing within an L2N?<br>

<br>
Phil</blockquote><div><br></div><div><br></div><div>I thought that ROLL routing was about something more specific than MANET routing? The way I understood it, the difference was basically: ROLL cares about identified, simplistic traffic patterns. Judging from what you say, I am wondering what is then, in your mind, the difference?</div>
<div><br></div><div>If there is no difference between ROLL routing and MANET routing other than &quot;ROLL wants to do exactly the same thing as MANET, only with 5 bytes of RAM and 1 byte-per-second of control traffic&quot;, then this is interesting research, but this is not ready for the IETF. MANET&nbsp;already has cared about small &quot;foot-print&quot; solutions for more than a decade, and experience so far has not given birth to a MANET solution with &quot;5&nbsp;bytes of RAM and 1 byte-per-second of control traffic&quot;. Thus, feasibility within 6 months or a year (which is the ballpark here, if I am not mistaken?)&nbsp;is not obvious at all.</div>
<div><br></div><div>If it is not the case, then please explain the difference between ROLL routing and MANET routing in a better way, in order to stress the feasibility of the goals.</div><div><br></div><div>Emmanuel</div>
</div><br></div>

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_______________________________________________
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Ciao Emmanuel,

You may have a different view but for me the currently written docs in 
ROLL are a mere basis for discussion and harmonizer of "language" of 
people with very (!) different backgrounds. This has worked very well so 
far as we are starting to understand each other.

The discussion on the inclusion/exclusion of certain protocols is maybe 
best placed in the actual (or future version of the) survey document 
itself. I propose to you that the next email you write to ROLL 
(including a possible response to my email), you simply formalize your 
thoughts and add them in the respective sections of the document.

As for the goals of ROLL, they are very clearly formalized in the 
charter. As for routing solutions over L2Ns, there are some already 
available which trade quite well the constraints of said networks (not 
implying that they do everything we would expect them to do).

Do not neglect one major difference to MANET in that in ROLL not every 
node wants to talk to every node but traffic is rather convergecast from 
nodes to sink(s). The routing solution we developed profits very much 
from this insight and works well on 3 bytes of RAM (literally).

Regards from snowy Barcelona,
Mischa.




Emmanuel Baccelli wrote:
> Hi Phil, happy new year. 
> 
> 
> On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <pal@cs.stanford.edu 
> <mailto:pal@cs.stanford.edu>> wrote:
> 
> 
>     On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:
> 
> 
> 
>         On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis
>         <pal@cs.stanford.edu <mailto:pal@cs.stanford.edu>> wrote:
> 
>         On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
> 
>         "analyze the scaling and characteristics of
>         existing protocols and identify whether or not they meet the routing
>         requirements of the applications identified above"
> 
>         If a protocol is not a routing protocol, then it can't meet the
>         routing requirements.
> 
> 
>         Let's look at one example I was pointing to, the beginning of
>         the abstract of
>         http://tools.ietf.org/html/draft-thubert-tree-discovery-06 which
>         reads:
> 
>         "This paper describes a simple distance vector protocol that exposes
>         only a default route towards the infrastructure in a nested NEMO
>         configuration."
> 
>         if this is not a routing protocol, what is it? If this is not in
>         scope, then I wonder what is.
> 
>         By the way, I'm sure you'll agree that it makes more sense to
>         evaluate this than to evaluate OSPF, in the context of ROLL...
> 
>         Maybe the next version of the draft will contain a convincing
>         explanation for these choices, but for now, I must say it still
>         eludes me.
> 
> 
>     You're right; it is a routing protocol. However, it only maintains a
>     default route. It does not provide sufficient mechanisms for two
>     nodes within an L2N to communicate. So I guess it's *technically* a
>     routing protocol, but not in the sense that the draft is concerned
>     with. Do you agree that the protocol described in
>     draft-thubert-tree-discovery-06 would require additional mechanisms
>     to support routing within an L2N?
> 
>     Phil
> 
> 
> 
> I thought that ROLL routing was about something more specific than MANET 
> routing? The way I understood it, the difference was basically: ROLL 
> cares about identified, simplistic traffic patterns. Judging from what 
> you say, I am wondering what is then, in your mind, the difference?
> 
> If there is no difference between ROLL routing and MANET routing other 
> than "ROLL wants to do exactly the same thing as MANET, only with 5 
> bytes of RAM and 1 byte-per-second of control traffic", then this is 
> interesting research, but this is not ready for the IETF. MANET already 
> has cared about small "foot-print" solutions for more than a decade, and 
> experience so far has not given birth to a MANET solution with "5 bytes 
> of RAM and 1 byte-per-second of control traffic". Thus, feasibility 
> within 6 months or a year (which is the ballpark here, if I am not 
> mistaken?) is not obvious at all.
> 
> If it is not the case, then please explain the difference between ROLL 
> routing and MANET routing in a better way, in order to stress the 
> feasibility of the goals.
> 
> Emmanuel
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
_______________________________________________
Roll mailing list
Roll@ietf.org
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Subject: [Roll] ** Please read ** Re: Proposal so as to reach a consensus on
	** draft-ietf-roll-protocols-survey-02 **
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Hi Emmanuel,

Happy new year too ... See in line,

On Jan 7, 2009, at 1:08 PM, Emmanuel Baccelli wrote:

> Hi Phil, happy new year.
>
>
> On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <pal@cs.stanford.edu>  
> wrote:
>
> On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:
>
>
>
> On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis <pal@cs.stanford.edu>  
> wrote:
>
> On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
>
> "analyze the scaling and characteristics of
> existing protocols and identify whether or not they meet the routing
> requirements of the applications identified above"
>
> If a protocol is not a routing protocol, then it can't meet the  
> routing requirements.
>
>
> Let's look at one example I was pointing to, the beginning of the  
> abstract of http://tools.ietf.org/html/draft-thubert-tree- 
> discovery-06 which reads:
>
> "This paper describes a simple distance vector protocol that exposes
> only a default route towards the infrastructure in a nested NEMO
> configuration."
>
> if this is not a routing protocol, what is it? If this is not in  
> scope, then I wonder what is.
>
> By the way, I'm sure you'll agree that it makes more sense to  
> evaluate this than to evaluate OSPF, in the context of ROLL...
>
> Maybe the next version of the draft will contain a convincing  
> explanation for these choices, but for now, I must say it still  
> eludes me.
>
> You're right; it is a routing protocol. However, it only maintains a  
> default route. It does not provide sufficient mechanisms for two  
> nodes within an L2N to communicate. So I guess it's *technically* a  
> routing protocol, but not in the sense that the draft is concerned  
> with. Do you agree that the protocol described in draft-thubert-tree- 
> discovery-06 would require additional mechanisms to support routing  
> within an L2N?
>
> Phil
>
>
> I thought that ROLL routing was about something more specific than  
> MANET routing? The way I understood it, the difference was  
> basically: ROLL cares about identified, simplistic traffic patterns.  
> Judging from what you say, I am wondering what is then, in your  
> mind, the difference?
>
> If there is no difference between ROLL routing and MANET routing  
> other than "ROLL wants to do exactly the same thing as MANET, only  
> with 5 bytes of RAM and 1 byte-per-second of control traffic", then  
> this is interesting research, but this is not ready for the IETF.  
> MANET already has cared about small "foot-print" solutions for more  
> than a decade, and experience so far has not given birth to a MANET  
> solution with "5 bytes of RAM and 1 byte-per-second of control  
> traffic". Thus, feasibility within 6 months or a year (which is the  
> ballpark here, if I am not mistaken?) is not obvious at all.
>

Although I strongly believe that discussion is always beneficial for  
the community, I also think that it is time to close on this, and this  
has been mentioned by several key WG members.

We (ROLL) are not chartered to discuss the differences between what we  
need to work on *and* MANET. Our charter is well specified and 4  
routing requirements with extensive discussion have been produced. So  
I would suggest to stop this counter productive discussion on ROLL  
versus MANET. If you need to better understand what we need to do  
please read the charter and the requirements documents.

It is now time to converge on the survey I-D, the aim of which (again)  
is to determine whether we can find an existing mature routing  
protocol (as defined today) that meet our specific and well documented  
routing requirements.

At this point, please very specific in what you want to see added to  
the document, which passed WG LC several weeks ago. We now need to  
quickly converge.

Thanks.

JP.

> If it is not the case, then please explain the difference between  
> ROLL routing and MANET routing in a better way, in order to stress  
> the feasibility of the goals.
>
> Emmanuel
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi =
Emmanuel,<div><br></div><div>Happy new year too ... See in =
line,</div><div><br></div><div><div><div>On Jan 7, 2009, at 1:08 PM, =
Emmanuel Baccelli wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite">Hi Phil, =
happy new year.&nbsp;<div><br><br><div class=3D"gmail_quote">On Tue, Jan =
6, 2009 at 6:46 PM, Philip Levis <span dir=3D"ltr">&lt;<a =
href=3D"mailto:pal@cs.stanford.edu">pal@cs.stanford.edu</a>></span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div><div></div><div =
class=3D"Wj3C7c"><br> On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli =
wrote:<br> <br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"> <br> <br> On Mon, Dec =
29, 2008 at 11:10 PM, Philip Levis &lt;<a =
href=3D"mailto:pal@cs.stanford.edu" =
target=3D"_blank">pal@cs.stanford.edu</a>> wrote:<br> <br> On Dec 22, =
2008, at 12:17 AM, Emmanuel Baccelli wrote:<br> <br> "analyze the =
scaling and characteristics of<br> existing protocols and identify =
whether or not they meet the routing<br> requirements of the =
applications identified above"<br> <br> If a protocol is not a routing =
protocol, then it can't meet the routing requirements.<br> <br> <br> =
Let's look at one example I was pointing to, the beginning of the =
abstract of <a href=3D"http://tools.ietf.org/html/draft-thubert-tree-" =
target=3D"_blank">http://tools.ietf.org/html/draft-thubert-tree-</a>discov=
ery-06 which reads:<br> <br> "This paper describes a simple distance =
vector protocol that exposes<br> only a default route towards the =
infrastructure in a nested NEMO<br> configuration."<br> <br> if this is =
not a routing protocol, what is it? If this is not in scope, then I =
wonder what is.<br> <br> By the way, I'm sure you'll agree that it makes =
more sense to evaluate this than to evaluate OSPF, in the context of =
ROLL...<br> <br> Maybe the next version of the draft will contain a =
convincing explanation for these choices, but for now, I must say it =
still eludes me.<br> </blockquote> <br></div></div> You're right; it is =
a routing protocol. However, it only maintains a default route. It does =
not provide sufficient mechanisms for two nodes within an L2N to =
communicate. So I guess it's *technically* a routing protocol, but not =
in the sense that the draft is concerned with. Do you agree that the =
protocol described in draft-thubert-tree-discovery-06 would require =
additional mechanisms to support routing within an L2N?<br> <br> =
Phil</blockquote><div><br></div><div><br></div><div>I thought that ROLL =
routing was about something more specific than MANET routing? The way I =
understood it, the difference was basically: ROLL cares about =
identified, simplistic traffic patterns. Judging from what you say, I am =
wondering what is then, in your mind, the difference?</div> =
<div><br></div><div>If there is no difference between ROLL routing and =
MANET routing other than "ROLL wants to do exactly the same thing as =
MANET, only with 5 bytes of RAM and 1 byte-per-second of control =
traffic", then this is interesting research, but this is not ready for =
the IETF. MANET&nbsp;already has cared about small "foot-print" =
solutions for more than a decade, and experience so far has not given =
birth to a MANET solution with "5&nbsp;bytes of RAM and 1 =
byte-per-second of control traffic". Thus, feasibility within 6 months =
or a year (which is the ballpark here, if I am not mistaken?)&nbsp;is =
not obvious at all.</div> =
<div><br></div></div></div></blockquote><div><br></div><div>Although I =
strongly believe that discussion is always beneficial for the community, =
I also think that it is time to close on this, and this has been =
mentioned by several key WG members.&nbsp;</div><div><br></div><div>We =
(ROLL) are not chartered to discuss the differences between what we need =
to work on *and* MANET. Our charter is well specified and 4 routing =
requirements with extensive discussion have been produced. So I would =
suggest to stop this counter productive discussion on ROLL versus MANET. =
If you need to better understand what we need to do please read the =
charter and the requirements documents.</div><div><br></div><div>It is =
now time to converge on the survey I-D, the aim of which (again) is to =
determine whether we can find an existing mature routing protocol (as =
defined today) that meet our specific and well documented routing =
requirements.</div><div><br></div><div>At this point, please very =
specific in what you want to see added to the document, which passed WG =
LC several weeks ago. We now need to quickly =
converge.</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</d=
iv><br><blockquote type=3D"cite"><div><div class=3D"gmail_quote"><div>If =
it is not the case, then please explain the difference between ROLL =
routing and MANET routing in a better way, in order to stress the =
feasibility of the goals.</div><div><br></div><div>Emmanuel</div> =
</div><br></div> _______________________________________________<br>Roll =
mailing list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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

--===============0113101845==--


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On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:

> Hi Emmanuel,
>
> Happy new year too ... See in line,
>
> On Jan 7, 2009, at 1:08 PM, Emmanuel Baccelli wrote:
>
>> Hi Phil, happy new year.
>>
>>
>> On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <pal@cs.stanford.edu>  
>> wrote:
>>
>> On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:
>>
>>
>>
>> On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis  
>> <pal@cs.stanford.edu> wrote:
>>
>> On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:
>>
>> "analyze the scaling and characteristics of
>> existing protocols and identify whether or not they meet the routing
>> requirements of the applications identified above"
>>
>> If a protocol is not a routing protocol, then it can't meet the  
>> routing requirements.
>>
>>
>> Let's look at one example I was pointing to, the beginning of the  
>> abstract of http://tools.ietf.org/html/draft-thubert-tree-discovery-06 
>>  which reads:
>>
>> "This paper describes a simple distance vector protocol that exposes
>> only a default route towards the infrastructure in a nested NEMO
>> configuration."
>>
>> if this is not a routing protocol, what is it? If this is not in  
>> scope, then I wonder what is.
>>
>> By the way, I'm sure you'll agree that it makes more sense to  
>> evaluate this than to evaluate OSPF, in the context of ROLL...
>>
>> Maybe the next version of the draft will contain a convincing  
>> explanation for these choices, but for now, I must say it still  
>> eludes me.
>>
>> You're right; it is a routing protocol. However, it only maintains  
>> a default route. It does not provide sufficient mechanisms for two  
>> nodes within an L2N to communicate. So I guess it's *technically* a  
>> routing protocol, but not in the sense that the draft is concerned  
>> with. Do you agree that the protocol described in draft-thubert- 
>> tree-discovery-06 would require additional mechanisms to support  
>> routing within an L2N?
>>
>> Phil
>>
>>
>> I thought that ROLL routing was about something more specific than  
>> MANET routing? The way I understood it, the difference was  
>> basically: ROLL cares about identified, simplistic traffic  
>> patterns. Judging from what you say, I am wondering what is then,  
>> in your mind, the difference?
>>
>> If there is no difference between ROLL routing and MANET routing  
>> other than "ROLL wants to do exactly the same thing as MANET, only  
>> with 5 bytes of RAM and 1 byte-per-second of control traffic", then  
>> this is interesting research, but this is not ready for the IETF.  
>> MANET already has cared about small "foot-print" solutions for more  
>> than a decade, and experience so far has not given birth to a MANET  
>> solution with "5 bytes of RAM and 1 byte-per-second of control  
>> traffic". Thus, feasibility within 6 months or a year (which is the  
>> ballpark here, if I am not mistaken?) is not obvious at all.
>>
>
> Although I strongly believe that discussion is always beneficial for  
> the community, I also think that it is time to close on this, and  
> this has been mentioned by several key WG members.
>
> We (ROLL) are not chartered to discuss the differences between what  
> we need to work on *and* MANET. Our charter is well specified and 4  
> routing requirements with extensive discussion have been produced.  
> So I would suggest to stop this counter productive discussion on  
> ROLL versus MANET. If you need to better understand what we need to  
> do please read the charter and the requirements documents.
>
> It is now time to converge on the survey I-D, the aim of which  
> (again) is to determine whether we can find an existing mature  
> routing protocol (as defined today) that meet our specific and well  
> documented routing requirements.
>
> At this point, please very specific in what you want to see added to  
> the document, which passed WG LC several weeks ago. We now need to  
> quickly converge.
>

Emmanuel, do you agree that draft-thubert-tree-discovery-06 is  
insufficient as it only maintains a default route? Pascal, do you agree?

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


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Thread-Topic: [Roll] ** Please read ** Re: Proposal so as to reach a consensus
	on** draft-ietf-roll-protocols-survey-02 **
Thread-Index: AclwzRkCFoePjfX7T4WmtDJDV1jqtQAq0p2w
References: <7C1A2E64-C1B0-472E-B354-77F290BBC80D@cisco.com><be8c8d780812180302x3f1d18acp3594dcdd2f750456@mail.gmail.com><2BD0AD28-7D65-4EE8-9D67-999E01671EB6@cs.stanford.edu><be8c8d780812190058s7ea96295s906cd87dd9b64400@mail.gmail.com><51701811-D5A1-4167-96F5-CAADAA98FCF8@cs.stanford.edu><A33D919C-93E9-48C9-BF6B-CE5CEC6DE24C@cisco.com><be8c8d780812220017y59a8ade9p49664dc33d89fca@mail.gmail.com><5851ED61-5159-4469-9E89-59496F5021C5@cs.stanford.edu><be8c8d780812310224w760addb0i4643fa25c4bb97d6@mail.gmail.com><B85D0EBA-D9C6-48C3-A0A3-EA0763D49D4D@cs.stanford.edu><be8c8d780901070408o1948ee96ib1d6a18c06a47775@mail.gmail.com>
	<6873D837-2EE2-46F6-A548-42A23DE09DD2@cisco.com>
From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "JP Vasseur (jvasseur)" <jvasseur@cisco.com>,
	"Emmanuel Baccelli" <emmanuel.baccelli@inria.fr>,
	"Ryuji Wakikawa" <ryuji.wakikawa@gmail.com>,
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Cc: ROLL WG <roll@ietf.org>
Subject: Re: [Roll] ** Please read ** Re: Proposal so as to reach a
	consensus on** draft-ietf-roll-protocols-survey-02 **
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Hi:=20

=20

As an author of TD , RRH and NINA, which are all building blocks that =
can be used together with others (including existing MANET protocols) in =
a consistent mesh/mobile solution, I never suggested to get this work =
included in the survey because the survey rules were very clear from the =
start, and excluded unproven / non standardized work -  since MANEMO / =
NEMO RO drafts are simply I-Ds they were excluded by definition.

=20

OTOH MANEMO did include sensor networks in the original proposal so I =
certainly hope that this work can be adapted for ROLL once ROLL is =
rechartered to work on solutions, which is not the case at this point of =
time. I waited a long time for NEMO to work on RO - RRH was published =
before NEMO was even formed as a group. I guess I can wait a little =
more. J

=20

Pascal

From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On Behalf Of =
JP Vasseur (jvasseur)
Sent: mercredi 7 janvier 2009 14:37
To: Emmanuel Baccelli
Cc: ROLL WG
Subject: [Roll] ** Please read ** Re: Proposal so as to reach a =
consensus on** draft-ietf-roll-protocols-survey-02 **

=20

Hi Emmanuel,

=20

Happy new year too ... See in line,

=20

On Jan 7, 2009, at 1:08 PM, Emmanuel Baccelli wrote:





Hi Phil, happy new year.=20

=20

On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis <pal@cs.stanford.edu> =
wrote:


On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:



On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis <pal@cs.stanford.edu> =
wrote:

On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:

"analyze the scaling and characteristics of
existing protocols and identify whether or not they meet the routing
requirements of the applications identified above"

If a protocol is not a routing protocol, then it can't meet the routing =
requirements.


Let's look at one example I was pointing to, the beginning of the =
abstract of http://tools.ietf.org/html/draft-thubert-tree-discovery-06 =
which reads:

"This paper describes a simple distance vector protocol that exposes
only a default route towards the infrastructure in a nested NEMO
configuration."

if this is not a routing protocol, what is it? If this is not in scope, =
then I wonder what is.

By the way, I'm sure you'll agree that it makes more sense to evaluate =
this than to evaluate OSPF, in the context of ROLL...

Maybe the next version of the draft will contain a convincing =
explanation for these choices, but for now, I must say it still eludes =
me.

=20

You're right; it is a routing protocol. However, it only maintains a =
default route. It does not provide sufficient mechanisms for two nodes =
within an L2N to communicate. So I guess it's *technically* a routing =
protocol, but not in the sense that the draft is concerned with. Do you =
agree that the protocol described in draft-thubert-tree-discovery-06 =
would require additional mechanisms to support routing within an L2N?

Phil

=20

=20

I thought that ROLL routing was about something more specific than MANET =
routing? The way I understood it, the difference was basically: ROLL =
cares about identified, simplistic traffic patterns. Judging from what =
you say, I am wondering what is then, in your mind, the difference?

=20

If there is no difference between ROLL routing and MANET routing other =
than "ROLL wants to do exactly the same thing as MANET, only with 5 =
bytes of RAM and 1 byte-per-second of control traffic", then this is =
interesting research, but this is not ready for the IETF. MANET already =
has cared about small "foot-print" solutions for more than a decade, and =
experience so far has not given birth to a MANET solution with "5 bytes =
of RAM and 1 byte-per-second of control traffic". Thus, feasibility =
within 6 months or a year (which is the ballpark here, if I am not =
mistaken?) is not obvious at all.

=20

=20

Although I strongly believe that discussion is always beneficial for the =
community, I also think that it is time to close on this, and this has =
been mentioned by several key WG members.=20

=20

We (ROLL) are not chartered to discuss the differences between what we =
need to work on *and* MANET. Our charter is well specified and 4 routing =
requirements with extensive discussion have been produced. So I would =
suggest to stop this counter productive discussion on ROLL versus MANET. =
If you need to better understand what we need to do please read the =
charter and the requirements documents.

=20

It is now time to converge on the survey I-D, the aim of which (again) =
is to determine whether we can find an existing mature routing protocol =
(as defined today) that meet our specific and well documented routing =
requirements.

=20

At this point, please very specific in what you want to see added to the =
document, which passed WG LC several weeks ago. We now need to quickly =
converge.

=20

Thanks.

=20

JP.





If it is not the case, then please explain the difference between ROLL =
routing and MANET routing in a better way, in order to stress the =
feasibility of the goals.

=20

Emmanuel

=20

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

=20


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-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'>

<div class=3DSection1>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi: <o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>As an author of TD , RRH and NINA, which are all building =
blocks
that can be used together with others (including existing MANET =
protocols) in a
consistent mesh/mobile solution, I never suggested to get this work =
included in
the survey because the survey rules were very clear from the start, and
excluded unproven / non standardized work - =A0since MANEMO / NEMO RO =
drafts are simply
I-Ds they were excluded by definition.<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>OTOH MANEMO did include sensor networks in the original =
proposal
so I certainly hope that this work can be adapted for ROLL once ROLL is
rechartered to work on solutions, which is not the case at this point of =
time.
I waited a long time for NEMO to work on RO &#8211; RRH was published =
before
NEMO was even formed as a group. I guess I can wait a little more. =
</span><span
style=3D'font-size:11.0pt;font-family:Wingdings;color:#1F497D'>J</span><s=
pan
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Pascal</span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></p>

<div style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm =
0cm 4.0pt'>

<div>

<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0cm 0cm 0cm'>

<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] <b>On Behalf Of =
</b>JP
Vasseur (jvasseur)<br>
<b>Sent:</b> mercredi 7 janvier 2009 14:37<br>
<b>To:</b> Emmanuel Baccelli<br>
<b>Cc:</b> ROLL WG<br>
<b>Subject:</b> [Roll] ** Please read ** Re: Proposal so as to reach a
consensus on** draft-ietf-roll-protocols-survey-02 =
**<o:p></o:p></span></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal>Hi Emmanuel,<o:p></o:p></p>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>Happy new year too ... See in line,<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<div>

<div>

<p class=3DMsoNormal>On Jan 7, 2009, at 1:08 PM, Emmanuel Baccelli =
wrote:<o:p></o:p></p>

</div>

<p class=3DMsoNormal><br>
<br>
<o:p></o:p></p>

<p class=3DMsoNormal>Hi Phil, happy new year.&nbsp;<o:p></o:p></p>

<div>

<p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><o:p>&nbsp;</o:p></p>

<div>

<p class=3DMsoNormal>On Tue, Jan 6, 2009 at 6:46 PM, Philip Levis &lt;<a
href=3D"mailto:pal@cs.stanford.edu">pal@cs.stanford.edu</a>&gt; =
wrote:<o:p></o:p></p>

<div>

<div>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><br>
On Dec 31, 2008, at 2:24 AM, Emmanuel Baccelli wrote:<o:p></o:p></p>

<p class=3DMsoNormal><br>
<br>
On Mon, Dec 29, 2008 at 11:10 PM, Philip Levis &lt;<a
href=3D"mailto:pal@cs.stanford.edu" =
target=3D"_blank">pal@cs.stanford.edu</a>&gt;
wrote:<br>
<br>
On Dec 22, 2008, at 12:17 AM, Emmanuel Baccelli wrote:<br>
<br>
&quot;analyze the scaling and characteristics of<br>
existing protocols and identify whether or not they meet the routing<br>
requirements of the applications identified above&quot;<br>
<br>
If a protocol is not a routing protocol, then it can't meet the routing
requirements.<br>
<br>
<br>
Let's look at one example I was pointing to, the beginning of the =
abstract of <a
href=3D"http://tools.ietf.org/html/draft-thubert-tree-" =
target=3D"_blank">http://tools.ietf.org/html/draft-thubert-tree-</a>disco=
very-06
which reads:<br>
<br>
&quot;This paper describes a simple distance vector protocol that =
exposes<br>
only a default route towards the infrastructure in a nested NEMO<br>
configuration.&quot;<br>
<br>
if this is not a routing protocol, what is it? If this is not in scope, =
then I
wonder what is.<br>
<br>
By the way, I'm sure you'll agree that it makes more sense to evaluate =
this
than to evaluate OSPF, in the context of ROLL...<br>
<br>
Maybe the next version of the draft will contain a convincing =
explanation for
these choices, but for now, I must say it still eludes =
me.<o:p></o:p></p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

</div>

<p class=3DMsoNormal>You're right; it is a routing protocol. However, it =
only
maintains a default route. It does not provide sufficient mechanisms for =
two
nodes within an L2N to communicate. So I guess it's *technically* a =
routing
protocol, but not in the sense that the draft is concerned with. Do you =
agree
that the protocol described in draft-thubert-tree-discovery-06 would =
require
additional mechanisms to support routing within an L2N?<br>
<br>
Phil<o:p></o:p></p>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>I thought that ROLL routing was about something =
more
specific than MANET routing? The way I understood it, the difference was
basically: ROLL cares about identified, simplistic traffic patterns. =
Judging
from what you say, I am wondering what is then, in your mind, the =
difference?<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>If there is no difference between ROLL routing and =
MANET
routing other than &quot;ROLL wants to do exactly the same thing as =
MANET, only
with 5 bytes of RAM and 1 byte-per-second of control traffic&quot;, then =
this
is interesting research, but this is not ready for the IETF. =
MANET&nbsp;already
has cared about small &quot;foot-print&quot; solutions for more than a =
decade,
and experience so far has not given birth to a MANET solution with
&quot;5&nbsp;bytes of RAM and 1 byte-per-second of control =
traffic&quot;. Thus,
feasibility within 6 months or a year (which is the ballpark here, if I =
am not
mistaken?)&nbsp;is not obvious at all.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

</div>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>Although I strongly believe that discussion is =
always
beneficial for the community, I also think that it is time to close on =
this,
and this has been mentioned by several key WG =
members.&nbsp;<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>We (ROLL) are not chartered to discuss the =
differences
between what we need to work on *and* MANET. Our charter is well =
specified and
4 routing requirements with extensive discussion have been produced. So =
I would
suggest to stop this counter productive discussion on ROLL versus MANET. =
If you
need to better understand what we need to do please read the charter and =
the
requirements documents.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>It is now time to converge on the survey I-D, the =
aim of
which (again) is to determine whether we can find an existing mature =
routing
protocol (as defined today) that meet our specific and well documented =
routing
requirements.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>At this point, please very specific in what you =
want to see
added to the document, which passed WG LC several weeks ago. We now need =
to
quickly converge.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>Thanks.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>JP.<o:p></o:p></p>

</div>

<p class=3DMsoNormal><br>
<br>
<o:p></o:p></p>

<div>

<div>

<div>

<p class=3DMsoNormal>If it is not the case, then please explain the =
difference
between ROLL routing and MANET routing in a better way, in order to =
stress the
feasibility of the goals.<o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<div>

<p class=3DMsoNormal>Emmanuel<o:p></o:p></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

<p class=3DMsoNormal>_______________________________________________<br>
Roll mailing list<br>
<a href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>
https://www.ietf.org/mailman/listinfo/roll<o:p></o:p></p>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

</div>

</div>

</div>

</body>

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Date: Thu, 8 Jan 2009 11:34:35 +0100
From: "Emmanuel Baccelli" <Emmanuel.Baccelli@inria.fr>
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>
> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>
>>
>> At this point, please very specific in what you want to see added to the
>> document, which passed WG LC several weeks ago. We now need to quickly
>> converge.
>>
>>

OK, I'll be specific:

1- Everyone in the community agrees that no protocol (existing or near
future) will pass ALL the criterias chosen by the draft.
2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS of
all these criterias.

So in order to be unambiguous, the draft should thus explicitly spell out:

3- the different subsets of criterias that are in fact targeted,
4- the evaluation of applicable protocols for each targeted subset.

This way, I think we will indeed stop wasting time with this.

Emmanuel

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<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div class="Wj3C7c"><br>
On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
At this point, please very specific in what you want to see added to the document, which passed WG LC several weeks ago. We now need to quickly converge.<br>
<br>
</blockquote>
</div></div></blockquote></div><div><br></div><br><div>OK, I&#39;ll be specific:</div><div><br></div><div>1- Everyone in the community agrees that no protocol (existing or near future) will pass ALL the criterias chosen by the draft.</div>
<div>2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS of all these criterias.</div><div><br></div><div>So in order to be unambiguous, the draft should thus explicitly spell out:</div><div><br></div>
<div>3- the different subsets of criterias that are in fact targeted,</div><div>4- the evaluation of applicable protocols for each targeted subset.</div><div><br></div><div>This way, I think we will indeed stop wasting time with this.&nbsp;</div>
<div><br></div><div>Emmanuel</div><div><br></div>

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Hi Emmanuel,

What have we achieved so far ?

(1) We wrote a very detailed set of routing requirements (with MUST,  
SHOULD, ...) - lots of work from the WG.
(2) We reached a consensus on the fact that no existing mature routing  
protocol exist today that satisfy the requirements of ROLL.
(3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT  
at all excluded as the set of candidates (with protocol extensions) -  
(see the discussion with Thomas)

When we got chartered, we have been tasked to see whether an existing  
routing protocol could satisfy our requirements. We could have taken  
the approach of considering all MUST, with subset on a per application  
basis, etc .. The WG rather decided to select a few (necessary but not  
sufficient) set of criterion derived from the requirements. The only  
objective of that I-D is to answer to this question.

Now, should ROLL be re-chartered to start some protocol work, there  
will obviously be several candidates to evaluate against the  
requirements (we will exclusively be using the routing requirements).  
This includes existing protocol with extensions and potentially new  
protocol.

Proposal
* Let's try to close on this I-D: hopefully, we managed to clarify the  
objective of that document (which might have been confusing and I  
understand your comments).
Steve told us that a new revision will be posted soon, addressing  
several comments including yours.
The objective is to send the I-D for IESG review by end of next week  
(we completed LC on Dec 5),
* Send the rechartering proposal to the IESG (new WG item: Start  
protocol work),
* Immediately start evaluating solutions (existing (with the help on  
the appropriate WGs) and potentially new ones) in light of the  
application specific routing requirements).
At that point, we may find out that more than one solution will be  
needed to satisfy the maximum number of MUST of application X and Y.  
We will figure this out at that point, but we of course first need to  
be re-chartered.

Can we agree on this plan ?

Thanks.

JP.

On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:

>
>
> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>
> At this point, please very specific in what you want to see added to  
> the document, which passed WG LC several weeks ago. We now need to  
> quickly converge.
>
>
>
> OK, I'll be specific:
>
> 1- Everyone in the community agrees that no protocol (existing or  
> near future) will pass ALL the criterias chosen by the draft.
> 2- Requirements for ROLL are in fact more realistic, i.e. various  
> SUBSETS of all these criterias.
>
> So in order to be unambiguous, the draft should thus explicitly  
> spell out:
>
> 3- the different subsets of criterias that are in fact targeted,
> 4- the evaluation of applicable protocols for each targeted subset.
>
> This way, I think we will indeed stop wasting time with this.
>
> Emmanuel
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi =
Emmanuel,<div><br></div><div>What have we&nbsp;achieved&nbsp;so far =
?</div><div><br></div><div>(1) We wrote a very detailed set of routing =
requirements (with MUST, SHOULD, ...) - lots of work from the =
WG.</div><div>(2) We reached a consensus on the fact that no existing =
mature routing protocol exist today that satisfy the requirements of =
ROLL.</div><div>(3) We also agreed that existing protocols (AODV, OLSR, =
...) are NOT at all excluded as the set of candidates (with protocol =
extensions) - (see the discussion with =
Thomas)</div><div><br></div><div>When we got chartered, we have been =
tasked to see&nbsp;whether an existing routing protocol could satisfy =
our requirements. We could have taken the approach of considering all =
MUST, with subset on a per application basis, etc .. The WG rather =
decided to select a few (necessary but not sufficient) set of criterion =
derived from the requirements. The only objective of that I-D is to =
answer to this question.</div><div><br></div><div>Now, should ROLL be =
re-chartered to start some protocol work, there will obviously be =
several candidates to evaluate against the requirements <b>(we will =
exclusively be using the routing requirements)</b>. This includes =
existing protocol with extensions and potentially new =
protocol.</div><div><br></div><div>Proposal</div><div>* Let's try to =
close on this I-D: hopefully, we managed to clarify the objective of =
that document (which might have been confusing and I understand your =
comments).</div><div>Steve told us that a new revision will be posted =
soon, addressing several comments including yours.</div><div>The =
objective is to send the I-D for IESG review by end of next week (we =
completed LC on Dec 5),</div><div>* Send the rechartering proposal to =
the IESG (new WG item: Start protocol work),</div><div>* Immediately =
start evaluating solutions (existing (with the help on the appropriate =
WGs) and potentially new ones) in light of the application specific =
routing requirements).</div><div>At that point, we may find out that =
more than one solution will be needed to satisfy the maximum number of =
MUST of application X and Y. We will figure this out at that point, but =
we of course first need to be re-chartered.</div><div><br></div><div>Can =
we agree on this plan =
?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><br><div class=3D"gmail_quote"><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex;"><div><div class=3D"Wj3C7c"><br> On Jan 7, 2009, =
at 5:37 AM, JP Vasseur wrote:<blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> =
<br> At this point, please very specific in what you want to see added =
to the document, which passed WG LC several weeks ago. We now need to =
quickly converge.<br> <br> </blockquote> =
</div></div></blockquote></div><div><br></div><br><div>OK, I'll be =
specific:</div><div><br></div><div>1- Everyone in the community agrees =
that no protocol (existing or near future) will pass ALL the criterias =
chosen by the draft.</div> <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these =
criterias.</div><div><br></div><div>So in order to be unambiguous, the =
draft should thus explicitly spell out:</div><div><br></div> <div>3- the =
different subsets of criterias that are in fact targeted,</div><div>4- =
the evaluation of applicable protocols for each targeted =
subset.</div><div><br></div><div>This way, I think we will indeed stop =
wasting time with this.&nbsp;</div> =
<div><br></div><div>Emmanuel</div><div><br></div> =
_______________________________________________<br>Roll mailing =
list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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


	Title           : Urban WSNs Routing Requirements in Low Power and Lossy Networks
	Author(s)       : M. Dohler, et al.
	Filename        : draft-ietf-roll-urban-routing-reqs-03.txt
	Pages           : 21
	Date            : 2009-01-08

The application-specific routing requirements for Urban Low Power and
Lossy Networks (U-LLNs) are presented in this document.  In the near
future, sensing and actuating nodes will be placed outdoors in urban
environments so as to improve the people's living conditions as well
as to monitor compliance with increasingly strict environmental laws.
These field nodes are expected to measure and report a wide gamut of
data, such as required in smart metering, waste disposal,
meteorological, pollution and allergy reporting applications.  The
majority of these nodes is expected to communicate wirelessly which -
given the limited radio range and the large number of nodes -
requires the use of suitable routing protocols.  The design of such
protocols will be mainly impacted by the limited resources of the
nodes (memory, processing power, battery, etc.) and the
particularities of the outdoor urban application scenarios.  As such,
for a wireless Routing Over Low power and Lossy networks (ROLL)
solution to be useful, the protocol(s) ought to be energy-efficient,
scalable, and autonomous.  This documents aims to specify a set of
requirements reflecting these and further U-LLNs tailored
characteristics.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-reqs-03.txt

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WG,

We have posted a new version of the urban requirements draft,
draft-ietf-roll-urban-routing-reqs-03.

The revisions made from -02 were in response to comments from the
General Area Review Team (Gen-ART) and the Security Directorate review
(secdir) in support of the IESG evaluation.

In particular,
    - Section 6.2 was updated so as not to suggest that we are
encouraging layer violation in cases where routing may be performed in
part based on the nature of the traffic, e.g. in order to support data
aggregation.
    - Minor edits were applied to Section 6.5 in order to discuss
groupcast more clearly.
    - We removed some text from the Security Considerations section that
was related to data/forwarding security.  We added a consideration of
denial of service attacks that may be launched by taking advantage of
the routing protocol.
    - Updated IETF boilerplate and references.

Please have a look at the updated draft and address any feedback to the
list.

Thanks,

-Tim


Internet-Drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.
>
>
> 	Title           : Urban WSNs Routing Requirements in Low Power and Lossy Networks
> 	Author(s)       : M. Dohler, et al.
> 	Filename        : draft-ietf-roll-urban-routing-reqs-03.txt
> 	Pages           : 21
> 	Date            : 2009-01-08
>
> The application-specific routing requirements for Urban Low Power and
> Lossy Networks (U-LLNs) are presented in this document.  In the near
> future, sensing and actuating nodes will be placed outdoors in urban
> environments so as to improve the people's living conditions as well
> as to monitor compliance with increasingly strict environmental laws.
> These field nodes are expected to measure and report a wide gamut of
> data, such as required in smart metering, waste disposal,
> meteorological, pollution and allergy reporting applications.  The
> majority of these nodes is expected to communicate wirelessly which -
> given the limited radio range and the large number of nodes -
> requires the use of suitable routing protocols.  The design of such
> protocols will be mainly impacted by the limited resources of the
> nodes (memory, processing power, battery, etc.) and the
> particularities of the outdoor urban application scenarios.  As such,
> for a wireless Routing Over Low power and Lossy networks (ROLL)
> solution to be useful, the protocol(s) ought to be energy-efficient,
> scalable, and autonomous.  This documents aims to specify a set of
> requirements reflecting these and further U-LLNs tailored
> characteristics.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-reqs-03.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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>   

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resending .. we need to move on.

Many Thanks.

JP.

On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:

> Hi Emmanuel,
>
> What have we achieved so far ?
>
> (1) We wrote a very detailed set of routing requirements (with MUST,  
> SHOULD, ...) - lots of work from the WG.
> (2) We reached a consensus on the fact that no existing mature  
> routing protocol exist today that satisfy the requirements of ROLL.
> (3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT  
> at all excluded as the set of candidates (with protocol extensions)  
> - (see the discussion with Thomas)
>
> When we got chartered, we have been tasked to see whether an  
> existing routing protocol could satisfy our requirements. We could  
> have taken the approach of considering all MUST, with subset on a  
> per application basis, etc .. The WG rather decided to select a few  
> (necessary but not sufficient) set of criterion derived from the  
> requirements. The only objective of that I-D is to answer to this  
> question.
>
> Now, should ROLL be re-chartered to start some protocol work, there  
> will obviously be several candidates to evaluate against the  
> requirements (we will exclusively be using the routing  
> requirements). This includes existing protocol with extensions and  
> potentially new protocol.
>
> Proposal
> * Let's try to close on this I-D: hopefully, we managed to clarify  
> the objective of that document (which might have been confusing and  
> I understand your comments).
> Steve told us that a new revision will be posted soon, addressing  
> several comments including yours.
> The objective is to send the I-D for IESG review by end of next week  
> (we completed LC on Dec 5),
> * Send the rechartering proposal to the IESG (new WG item: Start  
> protocol work),
> * Immediately start evaluating solutions (existing (with the help on  
> the appropriate WGs) and potentially new ones) in light of the  
> application specific routing requirements).
> At that point, we may find out that more than one solution will be  
> needed to satisfy the maximum number of MUST of application X and Y.  
> We will figure this out at that point, but we of course first need  
> to be re-chartered.
>
> Can we agree on this plan ?
>
> Thanks.
>
> JP.
>
> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>
>>
>>
>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>
>> At this point, please very specific in what you want to see added  
>> to the document, which passed WG LC several weeks ago. We now need  
>> to quickly converge.
>>
>>
>>
>> OK, I'll be specific:
>>
>> 1- Everyone in the community agrees that no protocol (existing or  
>> near future) will pass ALL the criterias chosen by the draft.
>> 2- Requirements for ROLL are in fact more realistic, i.e. various  
>> SUBSETS of all these criterias.
>>
>> So in order to be unambiguous, the draft should thus explicitly  
>> spell out:
>>
>> 3- the different subsets of criterias that are in fact targeted,
>> 4- the evaluation of applicable protocols for each targeted subset.
>>
>> This way, I think we will indeed stop wasting time with this.
>>
>> Emmanuel
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">resending .. we need to move =
on.<div><br></div><div>Many =
Thanks.</div><div><br></div><div>JP.</div><div><br><div><div>On Jan 8, =
2009, at 1:44 PM, JP Vasseur wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi =
Emmanuel,<div><br></div><div>What have we&nbsp;achieved&nbsp;so far =
?</div><div><br></div><div>(1) We wrote a very detailed set of routing =
requirements (with MUST, SHOULD, ...) - lots of work from the =
WG.</div><div>(2) We reached a consensus on the fact that no existing =
mature routing protocol exist today that satisfy the requirements of =
ROLL.</div><div>(3) We also agreed that existing protocols (AODV, OLSR, =
...) are NOT at all excluded as the set of candidates (with protocol =
extensions) - (see the discussion with =
Thomas)</div><div><br></div><div>When we got chartered, we have been =
tasked to see&nbsp;whether an existing routing protocol could satisfy =
our requirements. We could have taken the approach of considering all =
MUST, with subset on a per application basis, etc .. The WG rather =
decided to select a few (necessary but not sufficient) set of criterion =
derived from the requirements. The only objective of that I-D is to =
answer to this question.</div><div><br></div><div>Now, should ROLL be =
re-chartered to start some protocol work, there will obviously be =
several candidates to evaluate against the requirements <b>(we will =
exclusively be using the routing requirements)</b>. This includes =
existing protocol with extensions and potentially new =
protocol.</div><div><br></div><div>Proposal</div><div>* Let's try to =
close on this I-D: hopefully, we managed to clarify the objective of =
that document (which might have been confusing and I understand your =
comments).</div><div>Steve told us that a new revision will be posted =
soon, addressing several comments including yours.</div><div>The =
objective is to send the I-D for IESG review by end of next week (we =
completed LC on Dec 5),</div><div>* Send the rechartering proposal to =
the IESG (new WG item: Start protocol work),</div><div>* Immediately =
start evaluating solutions (existing (with the help on the appropriate =
WGs) and potentially new ones) in light of the application specific =
routing requirements).</div><div>At that point, we may find out that =
more than one solution will be needed to satisfy the maximum number of =
MUST of application X and Y. We will figure this out at that point, but =
we of course first need to be re-chartered.</div><div><br></div><div>Can =
we agree on this plan =
?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><br><div class=3D"gmail_quote"><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex;"><div><div class=3D"Wj3C7c"><br> On Jan 7, 2009, =
at 5:37 AM, JP Vasseur wrote:<blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> =
<br> At this point, please very specific in what you want to see added =
to the document, which passed WG LC several weeks ago. We now need to =
quickly converge.<br> <br> </blockquote> =
</div></div></blockquote></div><div><br></div><br><div>OK, I'll be =
specific:</div><div><br></div><div>1- Everyone in the community agrees =
that no protocol (existing or near future) will pass ALL the criterias =
chosen by the draft.</div> <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these =
criterias.</div><div><br></div><div>So in order to be unambiguous, the =
draft should thus explicitly spell out:</div><div><br></div> <div>3- the =
different subsets of criterias that are in fact targeted,</div><div>4- =
the evaluation of applicable protocols for each targeted =
subset.</div><div><br></div><div>This way, I think we will indeed stop =
wasting time with this.&nbsp;</div> =
<div><br></div><div>Emmanuel</div><div><br></div> =
_______________________________________________<br>Roll mailing =
list<br><a href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br><a =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
ailman/listinfo/roll</a><br></blockquote></div><br></div></div>___________=
____________________________________<br>Roll mailing list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com> wrote:

> resending .. we need to move on.
> Many Thanks.
>
> JP.
>
> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>
> Hi Emmanuel,
> What have we achieved so far ?
>
> (1) We wrote a very detailed set of routing requirements (with MUST,
> SHOULD, ...) - lots of work from the WG.
> (2) We reached a consensus on the fact that no existing mature routing
> protocol exist today that satisfy the requirements of ROLL.
> (3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT at all
> excluded as the set of candidates (with protocol extensions) - (see the
> discussion with Thomas)
>
> When we got chartered, we have been tasked to see whether an existing
> routing protocol could satisfy our requirements. We could have taken the
> approach of considering all MUST, with subset on a per application basis,
> etc .. The WG rather decided to select a few (necessary but not sufficient)
> set of criterion derived from the requirements. The only objective of that
> I-D is to answer to this question.
>
> Now, should ROLL be re-chartered to start some protocol work, there will
> obviously be several candidates to evaluate against the requirements *(we
> will exclusively be using the routing requirements)*. This includes
> existing protocol with extensions and potentially new protocol.
>
> Proposal
> * Let's try to close on this I-D: hopefully, we managed to clarify the
> objective of that document (which might have been confusing and I understand
> your comments).
> Steve told us that a new revision will be posted soon, addressing several
> comments including yours.
> The objective is to send the I-D for IESG review by end of next week (we
> completed LC on Dec 5),
> * Send the rechartering proposal to the IESG (new WG item: Start protocol
> work),
> * Immediately start evaluating solutions (existing (with the help on the
> appropriate WGs) and potentially new ones) in light of the application
> specific routing requirements).
> At that point, we may find out that more than one solution will be needed
> to satisfy the maximum number of MUST of application X and Y. We will figure
> this out at that point, but we of course first need to be re-chartered.
>
> Can we agree on this plan ?
>
> Thanks.
>
> JP.
>
> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>
>
>
>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>
>>>
>>> At this point, please very specific in what you want to see added to the
>>> document, which passed WG LC several weeks ago. We now need to quickly
>>> converge.
>>>
>>>
>
> OK, I'll be specific:
>
> 1- Everyone in the community agrees that no protocol (existing or near
> future) will pass ALL the criterias chosen by the draft.
> 2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS
> of all these criterias.
>
> So in order to be unambiguous, the draft should thus explicitly spell out:
>
> 3- the different subsets of criterias that are in fact targeted,
> 4- the evaluation of applicable protocols for each targeted subset.
>
> This way, I think we will indeed stop wasting time with this.
>
> Emmanuel
>
>
I am also looking forward to the next version of the draft. I have already
signaled all of what I thought was important to mention, in order to get a
useful document for the next phase of ROLL: identifying solutions for the
sets of requirements described in the requirement drafts. I am looking
forward to participating.
cheers,
Emmanuel

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<br><br><div class="gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <span dir="ltr">&lt;<a href="mailto:jvasseur@cisco.com">jvasseur@cisco.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 style="word-wrap:break-word">resending .. we need to move on.<div><br></div><div>Many Thanks.</div><div><br></div><font color="#888888"><div>JP.</div></font><div><div></div><div class="Wj3C7c"><div><br><div><div>On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:</div>
<br><blockquote type="cite"><div style="word-wrap:break-word">Hi Emmanuel,<div><br></div><div>What have we&nbsp;achieved&nbsp;so far ?</div><div><br></div><div>(1) We wrote a very detailed set of routing requirements (with MUST, SHOULD, ...) - lots of work from the WG.</div>
<div>(2) We reached a consensus on the fact that no existing mature routing protocol exist today that satisfy the requirements of ROLL.</div><div>(3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT at all excluded as the set of candidates (with protocol extensions) - (see the discussion with Thomas)</div>
<div><br></div><div>When we got chartered, we have been tasked to see&nbsp;whether an existing routing protocol could satisfy our requirements. We could have taken the approach of considering all MUST, with subset on a per application basis, etc .. The WG rather decided to select a few (necessary but not sufficient) set of criterion derived from the requirements. The only objective of that I-D is to answer to this question.</div>
<div><br></div><div>Now, should ROLL be re-chartered to start some protocol work, there will obviously be several candidates to evaluate against the requirements <b>(we will exclusively be using the routing requirements)</b>. This includes existing protocol with extensions and potentially new protocol.</div>
<div><br></div><div>Proposal</div><div>* Let&#39;s try to close on this I-D: hopefully, we managed to clarify the objective of that document (which might have been confusing and I understand your comments).</div><div>Steve told us that a new revision will be posted soon, addressing several comments including yours.</div>
<div>The objective is to send the I-D for IESG review by end of next week (we completed LC on Dec 5),</div><div>* Send the rechartering proposal to the IESG (new WG item: Start protocol work),</div><div>* Immediately start evaluating solutions (existing (with the help on the appropriate WGs) and potentially new ones) in light of the application specific routing requirements).</div>
<div>At that point, we may find out that more than one solution will be needed to satisfy the maximum number of MUST of application X and Y. We will figure this out at that point, but we of course first need to be re-chartered.</div>
<div><br></div><div>Can we agree on this plan ?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div><br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:</div><br><blockquote type="cite">
<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><br> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
 <br> At this point, please very specific in what you want to see added to the document, which passed WG LC several weeks ago. We now need to quickly converge.<br> <br> </blockquote> </div></div></blockquote></div><div><br>
</div><br><div>OK, I&#39;ll be specific:</div><div><br></div><div>1- Everyone in the community agrees that no protocol (existing or near future) will pass ALL the criterias chosen by the draft.</div> <div>2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS of all these criterias.</div>
<div><br></div><div>So in order to be unambiguous, the draft should thus explicitly spell out:</div><div><br></div> <div>3- the different subsets of criterias that are in fact targeted,</div><div>4- the evaluation of applicable protocols for each targeted subset.</div>
<div><br></div><div>This way, I think we will indeed stop wasting time with this.&nbsp;</div> <div><br></div><div>Emmanuel</div><div></div></blockquote></div></div></div></blockquote></div></div></div></div></div></blockquote>
<div><br></div><div>I am also looking forward to the next version of the draft. I have already signaled all of what I thought was important to mention, in order to get a useful document for the next phase of ROLL: identifying solutions for the sets of requirements described in the requirement drafts. I am looking forward to participating.</div>
<div>cheers,</div><div>Emmanuel</div></div><br>

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On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:

>
>
> On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com>  
> wrote:
> resending .. we need to move on.
>
> Many Thanks.
>
> JP.
>
> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>
>> Hi Emmanuel,
>>
>> What have we achieved so far ?
>>
>> (1) We wrote a very detailed set of routing requirements (with  
>> MUST, SHOULD, ...) - lots of work from the WG.
>> (2) We reached a consensus on the fact that no existing mature  
>> routing protocol exist today that satisfy the requirements of ROLL.
>> (3) We also agreed that existing protocols (AODV, OLSR, ...) are  
>> NOT at all excluded as the set of candidates (with protocol  
>> extensions) - (see the discussion with Thomas)
>>
>> When we got chartered, we have been tasked to see whether an  
>> existing routing protocol could satisfy our requirements. We could  
>> have taken the approach of considering all MUST, with subset on a  
>> per application basis, etc .. The WG rather decided to select a few  
>> (necessary but not sufficient) set of criterion derived from the  
>> requirements. The only objective of that I-D is to answer to this  
>> question.
>>
>> Now, should ROLL be re-chartered to start some protocol work, there  
>> will obviously be several candidates to evaluate against the  
>> requirements (we will exclusively be using the routing  
>> requirements). This includes existing protocol with extensions and  
>> potentially new protocol.
>>
>> Proposal
>> * Let's try to close on this I-D: hopefully, we managed to clarify  
>> the objective of that document (which might have been confusing and  
>> I understand your comments).
>> Steve told us that a new revision will be posted soon, addressing  
>> several comments including yours.
>> The objective is to send the I-D for IESG review by end of next  
>> week (we completed LC on Dec 5),
>> * Send the rechartering proposal to the IESG (new WG item: Start  
>> protocol work),
>> * Immediately start evaluating solutions (existing (with the help  
>> on the appropriate WGs) and potentially new ones) in light of the  
>> application specific routing requirements).
>> At that point, we may find out that more than one solution will be  
>> needed to satisfy the maximum number of MUST of application X and  
>> Y. We will figure this out at that point, but we of course first  
>> need to be re-chartered.
>>
>> Can we agree on this plan ?
>>
>> Thanks.
>>
>> JP.
>>
>> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>>
>>>
>>>
>>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>
>>> At this point, please very specific in what you want to see added  
>>> to the document, which passed WG LC several weeks ago. We now need  
>>> to quickly converge.
>>>
>>>
>>>
>>> OK, I'll be specific:
>>>
>>> 1- Everyone in the community agrees that no protocol (existing or  
>>> near future) will pass ALL the criterias chosen by the draft.
>>> 2- Requirements for ROLL are in fact more realistic, i.e. various  
>>> SUBSETS of all these criterias.
>>>
>>> So in order to be unambiguous, the draft should thus explicitly  
>>> spell out:
>>>
>>> 3- the different subsets of criterias that are in fact targeted,
>>> 4- the evaluation of applicable protocols for each targeted subset.
>>>
>>> This way, I think we will indeed stop wasting time with this.
>>>
>>> Emmanuel
>
>
> I am also looking forward to the next version of the draft. I have  
> already signaled all of what I thought was important to mention, in  
> order to get a useful document for the next phase of ROLL:  
> identifying solutions for the sets of requirements described in the  
> requirement drafts. I am looking forward to participating.
> cheers,

off-line ... c'est pas exactement ce que je proposais ... donc tu n'es  
pas OK avec le plan propose ? Car la prochaine version est la derniere  
(pas LC).

Merci.

JP.

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


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><br><div><div>On Jan 12, 2009, =
at 11:51 AM, Emmanuel Baccelli wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><br><br><div=
 class=3D"gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <span =
dir=3D"ltr">&lt;<a =
href=3D"mailto:jvasseur@cisco.com">jvasseur@cisco.com</a>></span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div =
style=3D"word-wrap:break-word">resending .. we need to move =
on.<div><br></div><div>Many Thanks.</div><div><br></div><font =
color=3D"#888888"><div>JP.</div></font><div><div></div><div =
class=3D"Wj3C7c"><div><br><div><div>On Jan 8, 2009, at 1:44 PM, JP =
Vasseur wrote:</div> <br><blockquote type=3D"cite"><div =
style=3D"word-wrap:break-word">Hi Emmanuel,<div><br></div><div>What have =
we&nbsp;achieved&nbsp;so far ?</div><div><br></div><div>(1) We wrote a =
very detailed set of routing requirements (with MUST, SHOULD, ...) - =
lots of work from the WG.</div> <div>(2) We reached a consensus on the =
fact that no existing mature routing protocol exist today that satisfy =
the requirements of ROLL.</div><div>(3) We also agreed that existing =
protocols (AODV, OLSR, ...) are NOT at all excluded as the set of =
candidates (with protocol extensions) - (see the discussion with =
Thomas)</div> <div><br></div><div>When we got chartered, we have been =
tasked to see&nbsp;whether an existing routing protocol could satisfy =
our requirements. We could have taken the approach of considering all =
MUST, with subset on a per application basis, etc .. The WG rather =
decided to select a few (necessary but not sufficient) set of criterion =
derived from the requirements. The only objective of that I-D is to =
answer to this question.</div> <div><br></div><div>Now, should ROLL be =
re-chartered to start some protocol work, there will obviously be =
several candidates to evaluate against the requirements <b>(we will =
exclusively be using the routing requirements)</b>. This includes =
existing protocol with extensions and potentially new protocol.</div> =
<div><br></div><div>Proposal</div><div>* Let's try to close on this I-D: =
hopefully, we managed to clarify the objective of that document (which =
might have been confusing and I understand your =
comments).</div><div>Steve told us that a new revision will be posted =
soon, addressing several comments including yours.</div> <div>The =
objective is to send the I-D for IESG review by end of next week (we =
completed LC on Dec 5),</div><div>* Send the rechartering proposal to =
the IESG (new WG item: Start protocol work),</div><div>* Immediately =
start evaluating solutions (existing (with the help on the appropriate =
WGs) and potentially new ones) in light of the application specific =
routing requirements).</div> <div>At that point, we may find out that =
more than one solution will be needed to satisfy the maximum number of =
MUST of application X and Y. We will figure this out at that point, but =
we of course first need to be re-chartered.</div> =
<div><br></div><div>Can we agree on this plan =
?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli =
wrote:</div><br><blockquote type=3D"cite"> <br><div =
class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><br> On =
Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"> <br> At this point, please very specific in =
what you want to see added to the document, which passed WG LC several =
weeks ago. We now need to quickly converge.<br> <br> </blockquote> =
</div></div></blockquote></div><div><br> </div><br><div>OK, I'll be =
specific:</div><div><br></div><div>1- Everyone in the community agrees =
that no protocol (existing or near future) will pass ALL the criterias =
chosen by the draft.</div> <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these criterias.</div> =
<div><br></div><div>So in order to be unambiguous, the draft should thus =
explicitly spell out:</div><div><br></div> <div>3- the different subsets =
of criterias that are in fact targeted,</div><div>4- the evaluation of =
applicable protocols for each targeted subset.</div> =
<div><br></div><div>This way, I think we will indeed stop wasting time =
with this.&nbsp;</div> =
<div><br></div><div>Emmanuel</div><div></div></blockquote></div></div></di=
v></blockquote></div></div></div></div></div></blockquote> =
<div><br></div><div>I am also looking forward to the next version of the =
draft. I have already signaled all of what I thought was important to =
mention, in order to get a useful document for the next phase of ROLL: =
identifying solutions for the sets of requirements described in the =
requirement drafts. I am looking forward to participating.</div> =
<div>cheers,</div></div></blockquote><div><br></div><div>off-line ... =
c'est pas exactement ce que je proposais ... donc tu n'es pas OK avec le =
plan propose ? Car la prochaine version est la derniere (pas =
LC).</div><div><br></div><div>Merci.</div><div><br></div><div>JP.</div><br=
><blockquote type=3D"cite"><div =
class=3D"gmail_quote"><div>Emmanuel</div></div><br> =
_______________________________________________<br>Roll mailing =
list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></body></html>=

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Cc: Emmanuel Baccelli <emmanuel.baccelli@inria.fr>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] ** Please read ** Re: Proposal so as to reach a
	consensus on ** draft-ietf-roll-protocols-survey-02 **
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sorry for the "French Part". What I wrote was ... "thus you do not  
agree with the proposed plan ?"

On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:

>
> On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:
>
>>
>>
>> On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com>  
>> wrote:
>> resending .. we need to move on.
>>
>> Many Thanks.
>>
>> JP.
>>
>> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>>
>>> Hi Emmanuel,
>>>
>>> What have we achieved so far ?
>>>
>>> (1) We wrote a very detailed set of routing requirements (with  
>>> MUST, SHOULD, ...) - lots of work from the WG.
>>> (2) We reached a consensus on the fact that no existing mature  
>>> routing protocol exist today that satisfy the requirements of ROLL.
>>> (3) We also agreed that existing protocols (AODV, OLSR, ...) are  
>>> NOT at all excluded as the set of candidates (with protocol  
>>> extensions) - (see the discussion with Thomas)
>>>
>>> When we got chartered, we have been tasked to see whether an  
>>> existing routing protocol could satisfy our requirements. We could  
>>> have taken the approach of considering all MUST, with subset on a  
>>> per application basis, etc .. The WG rather decided to select a  
>>> few (necessary but not sufficient) set of criterion derived from  
>>> the requirements. The only objective of that I-D is to answer to  
>>> this question.
>>>
>>> Now, should ROLL be re-chartered to start some protocol work,  
>>> there will obviously be several candidates to evaluate against the  
>>> requirements (we will exclusively be using the routing  
>>> requirements). This includes existing protocol with extensions and  
>>> potentially new protocol.
>>>
>>> Proposal
>>> * Let's try to close on this I-D: hopefully, we managed to clarify  
>>> the objective of that document (which might have been confusing  
>>> and I understand your comments).
>>> Steve told us that a new revision will be posted soon, addressing  
>>> several comments including yours.
>>> The objective is to send the I-D for IESG review by end of next  
>>> week (we completed LC on Dec 5),
>>> * Send the rechartering proposal to the IESG (new WG item: Start  
>>> protocol work),
>>> * Immediately start evaluating solutions (existing (with the help  
>>> on the appropriate WGs) and potentially new ones) in light of the  
>>> application specific routing requirements).
>>> At that point, we may find out that more than one solution will be  
>>> needed to satisfy the maximum number of MUST of application X and  
>>> Y. We will figure this out at that point, but we of course first  
>>> need to be re-chartered.
>>>
>>> Can we agree on this plan ?
>>>
>>> Thanks.
>>>
>>> JP.
>>>
>>> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>>>
>>>>
>>>>
>>>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>>
>>>> At this point, please very specific in what you want to see added  
>>>> to the document, which passed WG LC several weeks ago. We now  
>>>> need to quickly converge.
>>>>
>>>>
>>>>
>>>> OK, I'll be specific:
>>>>
>>>> 1- Everyone in the community agrees that no protocol (existing or  
>>>> near future) will pass ALL the criterias chosen by the draft.
>>>> 2- Requirements for ROLL are in fact more realistic, i.e. various  
>>>> SUBSETS of all these criterias.
>>>>
>>>> So in order to be unambiguous, the draft should thus explicitly  
>>>> spell out:
>>>>
>>>> 3- the different subsets of criterias that are in fact targeted,
>>>> 4- the evaluation of applicable protocols for each targeted subset.
>>>>
>>>> This way, I think we will indeed stop wasting time with this.
>>>>
>>>> Emmanuel
>>
>>
>> I am also looking forward to the next version of the draft. I have  
>> already signaled all of what I thought was important to mention, in  
>> order to get a useful document for the next phase of ROLL:  
>> identifying solutions for the sets of requirements described in the  
>> requirement drafts. I am looking forward to participating.
>> cheers,
>
> off-line ... c'est pas exactement ce que je proposais ... donc tu  
> n'es pas OK avec le plan propose ? Car la prochaine version est la  
> derniere (pas LC).
>
> Merci.
>
> JP.
>
>> Emmanuel
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">sorry for the "French Part". =
What I wrote was ... "thus you do not agree with the proposed plan =
?"<div><br><div><div>On Jan 12, 2009, at 2:44 PM, JP Vasseur =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; "><br><div><div>On Jan 12, =
2009, at 11:51 AM, Emmanuel Baccelli wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><br><br><div=
 class=3D"gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <span =
dir=3D"ltr">&lt;<a =
href=3D"mailto:jvasseur@cisco.com">jvasseur@cisco.com</a>></span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div =
style=3D"word-wrap:break-word">resending .. we need to move =
on.<div><br></div><div>Many Thanks.</div><div><br></div><font =
color=3D"#888888"><div>JP.</div></font><div><div></div><div =
class=3D"Wj3C7c"><div><br><div><div>On Jan 8, 2009, at 1:44 PM, JP =
Vasseur wrote:</div> <br><blockquote type=3D"cite"><div =
style=3D"word-wrap:break-word">Hi Emmanuel,<div><br></div><div>What have =
we&nbsp;achieved&nbsp;so far ?</div><div><br></div><div>(1) We wrote a =
very detailed set of routing requirements (with MUST, SHOULD, ...) - =
lots of work from the WG.</div> <div>(2) We reached a consensus on the =
fact that no existing mature routing protocol exist today that satisfy =
the requirements of ROLL.</div><div>(3) We also agreed that existing =
protocols (AODV, OLSR, ...) are NOT at all excluded as the set of =
candidates (with protocol extensions) - (see the discussion with =
Thomas)</div> <div><br></div><div>When we got chartered, we have been =
tasked to see&nbsp;whether an existing routing protocol could satisfy =
our requirements. We could have taken the approach of considering all =
MUST, with subset on a per application basis, etc .. The WG rather =
decided to select a few (necessary but not sufficient) set of criterion =
derived from the requirements. The only objective of that I-D is to =
answer to this question.</div> <div><br></div><div>Now, should ROLL be =
re-chartered to start some protocol work, there will obviously be =
several candidates to evaluate against the requirements <b>(we will =
exclusively be using the routing requirements)</b>. This includes =
existing protocol with extensions and potentially new protocol.</div> =
<div><br></div><div>Proposal</div><div>* Let's try to close on this I-D: =
hopefully, we managed to clarify the objective of that document (which =
might have been confusing and I understand your =
comments).</div><div>Steve told us that a new revision will be posted =
soon, addressing several comments including yours.</div> <div>The =
objective is to send the I-D for IESG review by end of next week (we =
completed LC on Dec 5),</div><div>* Send the rechartering proposal to =
the IESG (new WG item: Start protocol work),</div><div>* Immediately =
start evaluating solutions (existing (with the help on the appropriate =
WGs) and potentially new ones) in light of the application specific =
routing requirements).</div> <div>At that point, we may find out that =
more than one solution will be needed to satisfy the maximum number of =
MUST of application X and Y. We will figure this out at that point, but =
we of course first need to be re-chartered.</div> =
<div><br></div><div>Can we agree on this plan =
?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli =
wrote:</div><br><blockquote type=3D"cite"> <br><div =
class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><br> On =
Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"> <br> At this point, please very specific in =
what you want to see added to the document, which passed WG LC several =
weeks ago. We now need to quickly converge.<br> <br> </blockquote> =
</div></div></blockquote></div><div><br> </div><br><div>OK, I'll be =
specific:</div><div><br></div><div>1- Everyone in the community agrees =
that no protocol (existing or near future) will pass ALL the criterias =
chosen by the draft.</div> <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these criterias.</div> =
<div><br></div><div>So in order to be unambiguous, the draft should thus =
explicitly spell out:</div><div><br></div> <div>3- the different subsets =
of criterias that are in fact targeted,</div><div>4- the evaluation of =
applicable protocols for each targeted subset.</div> =
<div><br></div><div>This way, I think we will indeed stop wasting time =
with this.&nbsp;</div> =
<div><br></div><div>Emmanuel</div><div></div></blockquote></div></div></di=
v></blockquote></div></div></div></div></div></blockquote> =
<div><br></div><div>I am also looking forward to the next version of the =
draft. I have already signaled all of what I thought was important to =
mention, in order to get a useful document for the next phase of ROLL: =
identifying solutions for the sets of requirements described in the =
requirement drafts. I am looking forward to participating.</div> =
<div>cheers,</div></div></blockquote><div><br></div><div>off-line ... =
c'est pas exactement ce que je proposais ... donc tu n'es pas OK avec le =
plan propose ? Car la prochaine version est la derniere (pas =
LC).</div><div><br></div><div>Merci.</div><div><br></div><div>JP.</div><br=
><blockquote type=3D"cite"><div =
class=3D"gmail_quote"><div>Emmanuel</div></div><br> =
_______________________________________________<br>Roll mailing =
list<br><a href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br><a =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
ailman/listinfo/roll</a><br></blockquote></div><br></div>_________________=
______________________________<br>Roll mailing list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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_______________________________________________
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Date: Mon, 12 Jan 2009 15:54:22 +0100
From: "Emmanuel Baccelli" <Emmanuel.Baccelli@inria.fr>
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Subject: Re: [Roll] ** Please read ** Re: Proposal so as to reach a
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Sorry about the misunderstanding. I do not disagree with the plan. What I
meant was: I am looking forward to the revision of the draft, and to after
rechartering. My comments will be properly logged anyways, even if they are
not taken into account ;)
This document may be ill-conceived, but for me it does not alter the
consensus on the fact that something specific (at least an extension of an
existing protocol) needs to be standardized for ROLL. Hence it does not
alter the fact that rechartering is needed along the lines you proposed.

cheers
Emmanuel


On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <jvasseur@cisco.com> wrote:

> sorry for the "French Part". What I wrote was ... "thus you do not agree
> with the proposed plan ?"
>
> On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:
>
>
> On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:
>
>
>
> On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com> wrote:
>
>> resending .. we need to move on.
>> Many Thanks.
>>
>> JP.
>>
>> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>>
>> Hi Emmanuel,
>> What have we achieved so far ?
>>
>> (1) We wrote a very detailed set of routing requirements (with MUST,
>> SHOULD, ...) - lots of work from the WG.
>> (2) We reached a consensus on the fact that no existing mature routing
>> protocol exist today that satisfy the requirements of ROLL.
>> (3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT at
>> all excluded as the set of candidates (with protocol extensions) - (see the
>> discussion with Thomas)
>>
>> When we got chartered, we have been tasked to see whether an existing
>> routing protocol could satisfy our requirements. We could have taken the
>> approach of considering all MUST, with subset on a per application basis,
>> etc .. The WG rather decided to select a few (necessary but not sufficient)
>> set of criterion derived from the requirements. The only objective of that
>> I-D is to answer to this question.
>>
>> Now, should ROLL be re-chartered to start some protocol work, there will
>> obviously be several candidates to evaluate against the requirements *(we
>> will exclusively be using the routing requirements)*. This includes
>> existing protocol with extensions and potentially new protocol.
>>
>> Proposal
>> * Let's try to close on this I-D: hopefully, we managed to clarify the
>> objective of that document (which might have been confusing and I understand
>> your comments).
>> Steve told us that a new revision will be posted soon, addressing several
>> comments including yours.
>> The objective is to send the I-D for IESG review by end of next week (we
>> completed LC on Dec 5),
>> * Send the rechartering proposal to the IESG (new WG item: Start protocol
>> work),
>> * Immediately start evaluating solutions (existing (with the help on the
>> appropriate WGs) and potentially new ones) in light of the application
>> specific routing requirements).
>> At that point, we may find out that more than one solution will be needed
>> to satisfy the maximum number of MUST of application X and Y. We will figure
>> this out at that point, but we of course first need to be re-chartered.
>>
>> Can we agree on this plan ?
>>
>> Thanks.
>>
>> JP.
>>
>> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>>
>>
>>
>>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>>
>>>>
>>>> At this point, please very specific in what you want to see added to the
>>>> document, which passed WG LC several weeks ago. We now need to quickly
>>>> converge.
>>>>
>>>>
>>
>> OK, I'll be specific:
>>
>> 1- Everyone in the community agrees that no protocol (existing or near
>> future) will pass ALL the criterias chosen by the draft.
>> 2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS
>> of all these criterias.
>>
>> So in order to be unambiguous, the draft should thus explicitly spell out:
>>
>> 3- the different subsets of criterias that are in fact targeted,
>> 4- the evaluation of applicable protocols for each targeted subset.
>>
>> This way, I think we will indeed stop wasting time with this.
>>
>> Emmanuel
>>
>>
> I am also looking forward to the next version of the draft. I have already
> signaled all of what I thought was important to mention, in order to get a
> useful document for the next phase of ROLL: identifying solutions for the
> sets of requirements described in the requirement drafts. I am looking
> forward to participating.
> cheers,
>
>
> off-line ... c'est pas exactement ce que je proposais ... donc tu n'es pas
> OK avec le plan propose ? Car la prochaine version est la derniere (pas LC).
>
> Merci.
>
> JP.
>
> Emmanuel
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
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Sorry about the misunderstanding. I do not disagree with the plan. What I meant was: I am looking forward to the revision of the draft, and to after rechartering.&nbsp;My comments will be properly logged anyways, even if&nbsp;they are not taken into account ;)&nbsp;<div>

<br></div><div>This document may be ill-conceived, but for me it does not alter the consensus on the fact that something specific&nbsp;(at least an extension of an existing protocol) needs to be standardized for ROLL. Hence&nbsp;it does not alter the fact&nbsp;that rechartering is needed along the lines you proposed.</div>

<div><br><div>cheers<br><div>Emmanuel</div><div><br><br><div class="gmail_quote">On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <span dir="ltr">&lt;<a href="mailto:jvasseur@cisco.com" target="_blank">jvasseur@cisco.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 style="word-wrap:break-word">sorry for the &quot;French Part&quot;. What I wrote was ... &quot;thus you do not agree with the proposed plan ?&quot;<div>

<div></div><div><div><br><div><div>On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:</div><br><blockquote type="cite"><div style="word-wrap:break-word"><br><div><div>On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:</div>

<br><blockquote type="cite"><br><br><div class="gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <span dir="ltr">&lt;<a href="mailto:jvasseur@cisco.com" target="_blank">jvasseur@cisco.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 style="word-wrap:break-word">resending .. we need to move on.<div><br></div><div>Many Thanks.</div><div><br></div>

<font color="#888888"><div>JP.</div></font><div><div></div><div><div><br><div><div>On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:</div> <br><blockquote type="cite"><div style="word-wrap:break-word">Hi Emmanuel,<div><br></div>

<div>What have we&nbsp;achieved&nbsp;so far ?</div><div><br></div><div>(1) We wrote a very detailed set of routing requirements (with MUST, SHOULD, ...) - lots of work from the WG.</div> <div>(2) We reached a consensus on the fact that no existing mature routing protocol exist today that satisfy the requirements of ROLL.</div>

<div>(3) We also agreed that existing protocols (AODV, OLSR, ...) are NOT at all excluded as the set of candidates (with protocol extensions) - (see the discussion with Thomas)</div> <div><br></div><div>When we got chartered, we have been tasked to see&nbsp;whether an existing routing protocol could satisfy our requirements. We could have taken the approach of considering all MUST, with subset on a per application basis, etc .. The WG rather decided to select a few (necessary but not sufficient) set of criterion derived from the requirements. The only objective of that I-D is to answer to this question.</div>

 <div><br></div><div>Now, should ROLL be re-chartered to start some protocol work, there will obviously be several candidates to evaluate against the requirements <b>(we will exclusively be using the routing requirements)</b>. This includes existing protocol with extensions and potentially new protocol.</div>

 <div><br></div><div>Proposal</div><div>* Let&#39;s try to close on this I-D: hopefully, we managed to clarify the objective of that document (which might have been confusing and I understand your comments).</div><div>Steve told us that a new revision will be posted soon, addressing several comments including yours.</div>

 <div>The objective is to send the I-D for IESG review by end of next week (we completed LC on Dec 5),</div><div>* Send the rechartering proposal to the IESG (new WG item: Start protocol work),</div><div>* Immediately start evaluating solutions (existing (with the help on the appropriate WGs) and potentially new ones) in light of the application specific routing requirements).</div>

 <div>At that point, we may find out that more than one solution will be needed to satisfy the maximum number of MUST of application X and Y. We will figure this out at that point, but we of course first need to be re-chartered.</div>

 <div><br></div><div>Can we agree on this plan ?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div><br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:</div><br><blockquote type="cite">

 <br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><br> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

 <br> At this point, please very specific in what you want to see added to the document, which passed WG LC several weeks ago. We now need to quickly converge.<br> <br> </blockquote> </div></div></blockquote></div><div><br>

 </div><br><div>OK, I&#39;ll be specific:</div><div><br></div><div>1- Everyone in the community agrees that no protocol (existing or near future) will pass ALL the criterias chosen by the draft.</div> <div>2- Requirements for ROLL are in fact more realistic, i.e. various SUBSETS of all these criterias.</div>

 <div><br></div><div>So in order to be unambiguous, the draft should thus explicitly spell out:</div><div><br></div> <div>3- the different subsets of criterias that are in fact targeted,</div><div>4- the evaluation of applicable protocols for each targeted subset.</div>

 <div><br></div><div>This way, I think we will indeed stop wasting time with this.&nbsp;</div> <div><br></div><div>Emmanuel</div><div></div></blockquote></div></div></div></blockquote></div></div></div></div></div></blockquote>

 <div><br></div><div>I am also looking forward to the next version of the draft. I have already signaled all of what I thought was important to mention, in order to get a useful document for the next phase of ROLL: identifying solutions for the sets of requirements described in the requirement drafts. I am looking forward to participating.</div>

 <div>cheers,</div></div></blockquote><div><br></div><div>off-line ... c&#39;est pas exactement ce que je proposais ... donc tu n&#39;es pas OK avec le plan propose ? Car la prochaine version est la derniere (pas LC).</div>

<div><br></div><div>Merci.</div><div><br></div><div>JP.</div><br><blockquote type="cite"><div class="gmail_quote"><div>Emmanuel</div></div><br> _______________________________________________<br>Roll mailing list<br><a href="mailto:Roll@ietf.org" target="_blank">Roll@ietf.org</a><br>

<a href="https://www.ietf.org/mailman/listinfo/roll" target="_blank">https://www.ietf.org/mailman/listinfo/roll</a><br></blockquote></div><br></div>_______________________________________________<br>Roll mailing list<br>
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<a href="https://www.ietf.org/mailman/listinfo/roll" target="_blank">https://www.ietf.org/mailman/listinfo/roll</a><br></blockquote></div><br></div></div></div></div></blockquote></div><br></div></div></div>

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Hi Emmanuel,

On Jan 12, 2009, at 3:54 PM, Emmanuel Baccelli wrote:

> Sorry about the misunderstanding. I do not disagree with the plan.

OK great.

> What I meant was: I am looking forward to the revision of the draft,  
> and to after rechartering.

Excellent.

> My comments will be properly logged anyways, even if they are not  
> taken into account ;)
>
> This document may be ill-conceived, but for me it does not alter the  
> consensus on the fact that something specific (at least an extension  
> of an existing protocol) needs to be standardized for ROLL. Hence it  
> does not alter the fact that rechartering is needed along the lines  
> you proposed.
>

Thanks for the comments.

Cheers.

JP.

> cheers
> Emmanuel
>
>
> On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <jvasseur@cisco.com>  
> wrote:
> sorry for the "French Part". What I wrote was ... "thus you do not  
> agree with the proposed plan ?"
>
> On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:
>
>>
>> On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:
>>
>>>
>>>
>>> On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com>  
>>> wrote:
>>> resending .. we need to move on.
>>>
>>> Many Thanks.
>>>
>>> JP.
>>>
>>> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>>>
>>>> Hi Emmanuel,
>>>>
>>>> What have we achieved so far ?
>>>>
>>>> (1) We wrote a very detailed set of routing requirements (with  
>>>> MUST, SHOULD, ...) - lots of work from the WG.
>>>> (2) We reached a consensus on the fact that no existing mature  
>>>> routing protocol exist today that satisfy the requirements of ROLL.
>>>> (3) We also agreed that existing protocols (AODV, OLSR, ...) are  
>>>> NOT at all excluded as the set of candidates (with protocol  
>>>> extensions) - (see the discussion with Thomas)
>>>>
>>>> When we got chartered, we have been tasked to see whether an  
>>>> existing routing protocol could satisfy our requirements. We  
>>>> could have taken the approach of considering all MUST, with  
>>>> subset on a per application basis, etc .. The WG rather decided  
>>>> to select a few (necessary but not sufficient) set of criterion  
>>>> derived from the requirements. The only objective of that I-D is  
>>>> to answer to this question.
>>>>
>>>> Now, should ROLL be re-chartered to start some protocol work,  
>>>> there will obviously be several candidates to evaluate against  
>>>> the requirements (we will exclusively be using the routing  
>>>> requirements). This includes existing protocol with extensions  
>>>> and potentially new protocol.
>>>>
>>>> Proposal
>>>> * Let's try to close on this I-D: hopefully, we managed to  
>>>> clarify the objective of that document (which might have been  
>>>> confusing and I understand your comments).
>>>> Steve told us that a new revision will be posted soon, addressing  
>>>> several comments including yours.
>>>> The objective is to send the I-D for IESG review by end of next  
>>>> week (we completed LC on Dec 5),
>>>> * Send the rechartering proposal to the IESG (new WG item: Start  
>>>> protocol work),
>>>> * Immediately start evaluating solutions (existing (with the help  
>>>> on the appropriate WGs) and potentially new ones) in light of the  
>>>> application specific routing requirements).
>>>> At that point, we may find out that more than one solution will  
>>>> be needed to satisfy the maximum number of MUST of application X  
>>>> and Y. We will figure this out at that point, but we of course  
>>>> first need to be re-chartered.
>>>>
>>>> Can we agree on this plan ?
>>>>
>>>> Thanks.
>>>>
>>>> JP.
>>>>
>>>> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>>>>
>>>>>
>>>>>
>>>>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>>>
>>>>> At this point, please very specific in what you want to see  
>>>>> added to the document, which passed WG LC several weeks ago. We  
>>>>> now need to quickly converge.
>>>>>
>>>>>
>>>>>
>>>>> OK, I'll be specific:
>>>>>
>>>>> 1- Everyone in the community agrees that no protocol (existing  
>>>>> or near future) will pass ALL the criterias chosen by the draft.
>>>>> 2- Requirements for ROLL are in fact more realistic, i.e.  
>>>>> various SUBSETS of all these criterias.
>>>>>
>>>>> So in order to be unambiguous, the draft should thus explicitly  
>>>>> spell out:
>>>>>
>>>>> 3- the different subsets of criterias that are in fact targeted,
>>>>> 4- the evaluation of applicable protocols for each targeted  
>>>>> subset.
>>>>>
>>>>> This way, I think we will indeed stop wasting time with this.
>>>>>
>>>>> Emmanuel
>>>
>>>
>>> I am also looking forward to the next version of the draft. I have  
>>> already signaled all of what I thought was important to mention,  
>>> in order to get a useful document for the next phase of ROLL:  
>>> identifying solutions for the sets of requirements described in  
>>> the requirement drafts. I am looking forward to participating.
>>> cheers,
>>
>> off-line ... c'est pas exactement ce que je proposais ... donc tu  
>> n'es pas OK avec le plan propose ? Car la prochaine version est la  
>> derniere (pas LC).
>>
>> Merci.
>>
>> JP.
>>
>>> Emmanuel
>>>
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>
>
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi =
Emmanuel,<div><br><div><div>On Jan 12, 2009, at 3:54 PM, Emmanuel =
Baccelli wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite">Sorry about the misunderstanding. I do not disagree with =
the plan. </blockquote><div><br></div><div>OK =
great.</div><br><blockquote type=3D"cite">What I meant was: I am looking =
forward to the revision of the draft, and to after =
rechartering.&nbsp;</blockquote><div><br></div><div>Excellent.</div><br><b=
lockquote type=3D"cite">My comments will be properly logged anyways, =
even if&nbsp;they are not taken into account ;)&nbsp;<div> =
<br></div><div>This document may be ill-conceived, but for me it does =
not alter the consensus on the fact that something specific&nbsp;(at =
least an extension of an existing protocol) needs to be standardized for =
ROLL. Hence&nbsp;it does not alter the fact&nbsp;that rechartering is =
needed along the lines you proposed.</div> =
<div><br></div></blockquote><div><br></div><div>Thanks for the =
comments.</div><div><br></div><div>Cheers.</div><div><br></div><div>JP.</d=
iv><br><blockquote =
type=3D"cite"><div><div>cheers<br><div>Emmanuel</div><div><br><br><div =
class=3D"gmail_quote">On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <span =
dir=3D"ltr">&lt;<a href=3D"mailto:jvasseur@cisco.com" =
target=3D"_blank">jvasseur@cisco.com</a>></span> wrote:<br> <blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div style=3D"word-wrap:break-word">sorry for =
the "French Part". What I wrote was ... "thus you do not agree with the =
proposed plan ?"<div> <div></div><div><div><br><div><div>On Jan 12, =
2009, at 2:44 PM, JP Vasseur wrote:</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap:break-word"><br><div><div>On Jan =
12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:</div> <br><blockquote =
type=3D"cite"><br><br><div class=3D"gmail_quote">On Mon, Jan 12, 2009 at =
8:58 AM, JP Vasseur <span dir=3D"ltr">&lt;<a =
href=3D"mailto:jvasseur@cisco.com" =
target=3D"_blank">jvasseur@cisco.com</a>></span> wrote:<br> <blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"> <div style=3D"word-wrap:break-word">resending =
.. we need to move on.<div><br></div><div>Many =
Thanks.</div><div><br></div> <font =
color=3D"#888888"><div>JP.</div></font><div><div></div><div><div><br><div>=
<div>On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:</div> <br><blockquote =
type=3D"cite"><div style=3D"word-wrap:break-word">Hi =
Emmanuel,<div><br></div> <div>What have we&nbsp;achieved&nbsp;so far =
?</div><div><br></div><div>(1) We wrote a very detailed set of routing =
requirements (with MUST, SHOULD, ...) - lots of work from the WG.</div> =
<div>(2) We reached a consensus on the fact that no existing mature =
routing protocol exist today that satisfy the requirements of =
ROLL.</div> <div>(3) We also agreed that existing protocols (AODV, OLSR, =
...) are NOT at all excluded as the set of candidates (with protocol =
extensions) - (see the discussion with Thomas)</div> =
<div><br></div><div>When we got chartered, we have been tasked to =
see&nbsp;whether an existing routing protocol could satisfy our =
requirements. We could have taken the approach of considering all MUST, =
with subset on a per application basis, etc .. The WG rather decided to =
select a few (necessary but not sufficient) set of criterion derived =
from the requirements. The only objective of that I-D is to answer to =
this question.</div>  <div><br></div><div>Now, should ROLL be =
re-chartered to start some protocol work, there will obviously be =
several candidates to evaluate against the requirements <b>(we will =
exclusively be using the routing requirements)</b>. This includes =
existing protocol with extensions and potentially new protocol.</div>  =
<div><br></div><div>Proposal</div><div>* Let's try to close on this I-D: =
hopefully, we managed to clarify the objective of that document (which =
might have been confusing and I understand your =
comments).</div><div>Steve told us that a new revision will be posted =
soon, addressing several comments including yours.</div>  <div>The =
objective is to send the I-D for IESG review by end of next week (we =
completed LC on Dec 5),</div><div>* Send the rechartering proposal to =
the IESG (new WG item: Start protocol work),</div><div>* Immediately =
start evaluating solutions (existing (with the help on the appropriate =
WGs) and potentially new ones) in light of the application specific =
routing requirements).</div>  <div>At that point, we may find out that =
more than one solution will be needed to satisfy the maximum number of =
MUST of application X and Y. We will figure this out at that point, but =
we of course first need to be re-chartered.</div>  =
<div><br></div><div>Can we agree on this plan =
?</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli =
wrote:</div><br><blockquote type=3D"cite">  <br><div =
class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><br> On =
Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:<blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex">  <br> At this point, please very specific in =
what you want to see added to the document, which passed WG LC several =
weeks ago. We now need to quickly converge.<br> <br> </blockquote> =
</div></div></blockquote></div><div><br>  </div><br><div>OK, I'll be =
specific:</div><div><br></div><div>1- Everyone in the community agrees =
that no protocol (existing or near future) will pass ALL the criterias =
chosen by the draft.</div> <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these criterias.</div>  =
<div><br></div><div>So in order to be unambiguous, the draft should thus =
explicitly spell out:</div><div><br></div> <div>3- the different subsets =
of criterias that are in fact targeted,</div><div>4- the evaluation of =
applicable protocols for each targeted subset.</div>  =
<div><br></div><div>This way, I think we will indeed stop wasting time =
with this.&nbsp;</div> =
<div><br></div><div>Emmanuel</div><div></div></blockquote></div></div></di=
v></blockquote></div></div></div></div></div></blockquote>  =
<div><br></div><div>I am also looking forward to the next version of the =
draft. I have already signaled all of what I thought was important to =
mention, in order to get a useful document for the next phase of ROLL: =
identifying solutions for the sets of requirements described in the =
requirement drafts. I am looking forward to participating.</div>  =
<div>cheers,</div></div></blockquote><div><br></div><div>off-line ... =
c'est pas exactement ce que je proposais ... donc tu n'es pas OK avec le =
plan propose ? Car la prochaine version est la derniere (pas LC).</div> =
<div><br></div><div>Merci.</div><div><br></div><div>JP.</div><br><blockquo=
te type=3D"cite"><div class=3D"gmail_quote"><div>Emmanuel</div></div><br> =
_______________________________________________<br>Roll mailing =
list<br><a href=3D"mailto:Roll@ietf.org" =
target=3D"_blank">Roll@ietf.org</a><br> <a =
href=3D"https://www.ietf.org/mailman/listinfo/roll" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/roll</a><br></bloc=
kquote></div><br></div>_______________________________________________<br>=
Roll mailing list<br> <a href=3D"mailto:Roll@ietf.org" =
target=3D"_blank">Roll@ietf.org</a><br> <a =
href=3D"https://www.ietf.org/mailman/listinfo/roll" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/roll</a><br></bloc=
kquote></div><br></div></div></div></div></blockquote></div><br></div></di=
v></div> _______________________________________________<br>Roll mailing =
list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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Date: Mon, 12 Jan 2009 09:54:32 -0800
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To: Emmanuel Baccelli <Emmanuel.Baccelli@inria.fr>
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	<be8c8d780901070408o1948ee96ib1d6a18c06a47775@mail.gmail.com>
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In-Reply-To: <be8c8d780901120654m79c8e49fg636f9a877c175230@mail.gmail.com>
Cc: ROLL WG <roll@ietf.org>
Subject: Re: [Roll] ** Please read ** Re: Proposal so as to reach
 a	consensus on ** draft-ietf-roll-protocols-survey-02 **
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I think that you said "Yes, this ID can go forward".&nbsp; (I got lost in
the multi-negatives.)<br>
<br>
Emmanuel Baccelli wrote:
<blockquote
 cite="mid:be8c8d780901120654m79c8e49fg636f9a877c175230@mail.gmail.com"
 type="cite">Sorry about the misunderstanding. I do not disagree with
the plan. What I meant was: I am looking forward to the revision of the
draft, and to after rechartering.&nbsp;My comments will be properly logged
anyways, even if&nbsp;they are not taken into account ;)&nbsp;
  <div><br>
  </div>
  <div>This document may be ill-conceived, but for me it does not alter
the consensus on the fact that something specific&nbsp;(at least an
extension of an existing protocol) needs to be standardized for ROLL.
Hence&nbsp;it does not alter the fact&nbsp;that rechartering is needed along the
lines you proposed.</div>
  <div><br>
  <div>cheers<br>
  <div>Emmanuel</div>
  <div><br>
  <br>
  <div class="gmail_quote">On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <span
 dir="ltr">&lt;<a moz-do-not-send="true"
 href="mailto:jvasseur@cisco.com" target="_blank">jvasseur@cisco.com</a>&gt;</span>
wrote:<br>
  <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
    <div style="">sorry for the "French Part". What I wrote was ...
"thus you do not agree with the proposed plan ?"
    <div>
    <div>
    <div><br>
    <div>
    <div>On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:</div>
    <br>
    <blockquote type="cite">
      <div style=""><br>
      <div>
      <div>On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:</div>
      <br>
      <blockquote type="cite"><br>
        <br>
        <div class="gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP
Vasseur <span dir="ltr">&lt;<a moz-do-not-send="true"
 href="mailto:jvasseur@cisco.com" target="_blank">jvasseur@cisco.com</a>&gt;</span>
wrote:<br>
        <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
          <div style="">resending .. we need to move on.
          <div><br>
          </div>
          <div>Many Thanks.</div>
          <div><br>
          </div>
          <font color="#888888">
          <div>JP.</div>
          </font>
          <div>
          <div>
          <div><br>
          <div>
          <div>On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:</div>
          <br>
          <blockquote type="cite">
            <div style="">Hi Emmanuel,
            <div><br>
            </div>
            <div>What have we&nbsp;achieved&nbsp;so far ?</div>
            <div><br>
            </div>
            <div>(1) We wrote a very detailed set of routing
requirements (with MUST, SHOULD, ...) - lots of work from the WG.</div>
            <div>(2) We reached a consensus on the fact that no
existing mature routing protocol exist today that satisfy the
requirements of ROLL.</div>
            <div>(3) We also agreed that existing protocols (AODV,
OLSR, ...) are NOT at all excluded as the set of candidates (with
protocol extensions) - (see the discussion with Thomas)</div>
            <div><br>
            </div>
            <div>When we got chartered, we have been tasked to
see&nbsp;whether an existing routing protocol could satisfy our
requirements. We could have taken the approach of considering all MUST,
with subset on a per application basis, etc .. The WG rather decided to
select a few (necessary but not sufficient) set of criterion derived
from the requirements. The only objective of that I-D is to answer to
this question.</div>
            <div><br>
            </div>
            <div>Now, should ROLL be re-chartered to start some
protocol work, there will obviously be several candidates to evaluate
against the requirements <b>(we will exclusively be using the routing
requirements)</b>. This includes existing protocol with extensions and
potentially new protocol.</div>
            <div><br>
            </div>
            <div>Proposal</div>
            <div>* Let's try to close on this I-D: hopefully, we
managed to clarify the objective of that document (which might have
been confusing and I understand your comments).</div>
            <div>Steve told us that a new revision will be posted soon,
addressing several comments including yours.</div>
            <div>The objective is to send the I-D for IESG review by
end of next week (we completed LC on Dec 5),</div>
            <div>* Send the rechartering proposal to the IESG (new WG
item: Start protocol work),</div>
            <div>* Immediately start evaluating solutions (existing
(with the help on the appropriate WGs) and potentially new ones) in
light of the application specific routing requirements).</div>
            <div>At that point, we may find out that more than one
solution will be needed to satisfy the maximum number of MUST of
application X and Y. We will figure this out at that point, but we of
course first need to be re-chartered.</div>
            <div><br>
            </div>
            <div>Can we agree on this plan ?</div>
            <div><br>
            </div>
            <div>Thanks.</div>
            <div><br>
            </div>
            <div>JP.</div>
            <div><br>
            <div>
            <div>On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:</div>
            <br>
            <blockquote type="cite"> <br>
              <div class="gmail_quote">
              <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
                <div>
                <div><br>
On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
                <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
                  <br>
At this point, please very specific in what you want to see added to
the document, which passed WG LC several weeks ago. We now need to
quickly converge.<br>
                  <br>
                </blockquote>
                </div>
                </div>
              </blockquote>
              </div>
              <div><br>
              </div>
              <br>
              <div>OK, I'll be specific:</div>
              <div><br>
              </div>
              <div>1- Everyone in the community agrees that no protocol
(existing or near future) will pass ALL the criterias chosen by the
draft.</div>
              <div>2- Requirements for ROLL are in fact more realistic,
i.e. various SUBSETS of all these criterias.</div>
              <div><br>
              </div>
              <div>So in order to be unambiguous, the draft should thus
explicitly spell out:</div>
              <div><br>
              </div>
              <div>3- the different subsets of criterias that are in
fact targeted,</div>
              <div>4- the evaluation of applicable protocols for each
targeted subset.</div>
              <div><br>
              </div>
              <div>This way, I think we will indeed stop wasting time
with this.&nbsp;</div>
              <div><br>
              </div>
              <div>Emmanuel</div>
            </blockquote>
            </div>
            </div>
            </div>
          </blockquote>
          </div>
          </div>
          </div>
          </div>
          </div>
        </blockquote>
        <div><br>
        </div>
        <div>I am also looking forward to the next version of the
draft. I have already signaled all of what I thought was important to
mention, in order to get a useful document for the next phase of ROLL:
identifying solutions for the sets of requirements described in the
requirement drafts. I am looking forward to participating.</div>
        <div>cheers,</div>
        </div>
      </blockquote>
      <div><br>
      </div>
      <div>off-line ... c'est pas exactement ce que je proposais ...
donc tu n'es pas OK avec le plan propose ? Car la prochaine version est
la derniere (pas LC).</div>
      <div><br>
      </div>
      <div>Merci.</div>
      <div><br>
      </div>
      <div>JP.</div>
      <br>
      <blockquote type="cite">
        <div class="gmail_quote">
        <div>Emmanuel</div>
        </div>
        <br>
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      </div>
      <br>
      </div>
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    </blockquote>
    </div>
    <br>
    </div>
    </div>
    </div>
    </div>
  </blockquote>
  </div>
  <br>
  </div>
  </div>
  </div>
  <pre wrap="">
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Subject: Re: [Roll] ** Please read ** Re: Proposal so as to reach a
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It was not only you David :-)

Cheers,

Miguel Sanchez


On Mon, Jan 12, 2009 at 6:54 PM, David E. Culler
<culler@eecs.berkeley.edu>wrote:

>  I think that you said "Yes, this ID can go forward".  (I got lost in the
> multi-negatives.)
>
>

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It was not only you David :-)<br><br>Cheers,<br><br>Miguel Sanchez<br><br><br><div class="gmail_quote">On Mon, Jan 12, 2009 at 6:54 PM, David E. Culler <span dir="ltr">&lt;<a href="mailto:culler@eecs.berkeley.edu">culler@eecs.berkeley.edu</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">


  

<div bgcolor="#ffffff" text="#000000">
I think that you said &quot;Yes, this ID can go forward&quot;.&nbsp; (I got lost in
the multi-negatives.)<br>
<br>
</div></blockquote></div><br>

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Date: Tue, 13 Jan 2009 04:30:30 +0100
To: "David E. Culler" <culler@eecs.berkeley.edu>,
	JP Vasseur <jvasseur@cisco.com>
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I'm not Emmanuel :) but I'd like to actually *read* the updated I-D  
before pronouncing myself on if the I-D can go forward.

My position is that a lot of people have given a lot of good feedback  
to the current I-D, and that the WG chairs and authors have responded  
with "Ok, we'll produce an update based on this feedback".

I appreciate that position, and have all the confidence that the  
authors will try to capture the feedback in their update as best they  
can. I think that it'd be unfair to the authors to not await and  
review this I-D before saying "yes" or "no".

I've been sitting quiet for a while, since I felt that I had given  
air to my concerns and that those were being listened to (even if not  
agreed with :) ) so repeating myself would not be helpful until an  
updated I-D was out.

As soon as a new I-D hits the servers, I shall jump on a review. I  
would, however, suggest if a bit more than a week of review time is  
allowed before the I-D is being sent to the IESG: I think that it'd  
be better if any concerns are aired and addressed within the WG  
rather than linger and have to be raised (and potentially cause  
problems) elsewhere within the circuit. A week is really short, and a  
lot of issues have been raised. I, for one, am traveling - writing  
this email from a hotel room in Beijing - and still want to give this  
document the cycles it, and the authors, deserve.

Sounds fair enough, no?

Thomas

On Jan 12, 2009, at 18:54 PM, David E. Culler wrote:

> I think that you said "Yes, this ID can go forward".  (I got lost  
> in the multi-negatives.)
>
> Emmanuel Baccelli wrote:
>>
>> Sorry about the misunderstanding. I do not disagree with the plan.  
>> What I meant was: I am looking forward to the revision of the  
>> draft, and to after rechartering. My comments will be properly  
>> logged anyways, even if they are not taken into account ;)
>>
>> This document may be ill-conceived, but for me it does not alter  
>> the consensus on the fact that something specific (at least an  
>> extension of an existing protocol) needs to be standardized for  
>> ROLL. Hence it does not alter the fact that rechartering is needed  
>> along the lines you proposed.
>>
>> cheers
>> Emmanuel
>>
>>
>> On Mon, Jan 12, 2009 at 2:48 PM, JP Vasseur <jvasseur@cisco.com>  
>> wrote:
>> sorry for the "French Part". What I wrote was ... "thus you do not  
>> agree with the proposed plan ?"
>>
>> On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:
>>
>>>
>>> On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:
>>>
>>>>
>>>>
>>>> On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <jvasseur@cisco.com>  
>>>> wrote:
>>>> resending .. we need to move on.
>>>>
>>>> Many Thanks.
>>>>
>>>> JP.
>>>>
>>>> On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:
>>>>
>>>>> Hi Emmanuel,
>>>>>
>>>>> What have we achieved so far ?
>>>>>
>>>>> (1) We wrote a very detailed set of routing requirements (with  
>>>>> MUST, SHOULD, ...) - lots of work from the WG.
>>>>> (2) We reached a consensus on the fact that no existing mature  
>>>>> routing protocol exist today that satisfy the requirements of  
>>>>> ROLL.
>>>>> (3) We also agreed that existing protocols (AODV, OLSR, ...)  
>>>>> are NOT at all excluded as the set of candidates (with protocol  
>>>>> extensions) - (see the discussion with Thomas)
>>>>>
>>>>> When we got chartered, we have been tasked to see whether an  
>>>>> existing routing protocol could satisfy our requirements. We  
>>>>> could have taken the approach of considering all MUST, with  
>>>>> subset on a per application basis, etc .. The WG rather decided  
>>>>> to select a few (necessary but not sufficient) set of criterion  
>>>>> derived from the requirements. The only objective of that I-D  
>>>>> is to answer to this question.
>>>>>
>>>>> Now, should ROLL be re-chartered to start some protocol work,  
>>>>> there will obviously be several candidates to evaluate against  
>>>>> the requirements (we will exclusively be using the routing  
>>>>> requirements). This includes existing protocol with extensions  
>>>>> and potentially new protocol.
>>>>>
>>>>> Proposal
>>>>> * Let's try to close on this I-D: hopefully, we managed to  
>>>>> clarify the objective of that document (which might have been  
>>>>> confusing and I understand your comments).
>>>>> Steve told us that a new revision will be posted soon,  
>>>>> addressing several comments including yours.
>>>>> The objective is to send the I-D for IESG review by end of next  
>>>>> week (we completed LC on Dec 5),
>>>>> * Send the rechartering proposal to the IESG (new WG item:  
>>>>> Start protocol work),
>>>>> * Immediately start evaluating solutions (existing (with the  
>>>>> help on the appropriate WGs) and potentially new ones) in light  
>>>>> of the application specific routing requirements).
>>>>> At that point, we may find out that more than one solution will  
>>>>> be needed to satisfy the maximum number of MUST of application  
>>>>> X and Y. We will figure this out at that point, but we of  
>>>>> course first need to be re-chartered.
>>>>>
>>>>> Can we agree on this plan ?
>>>>>
>>>>> Thanks.
>>>>>
>>>>> JP.
>>>>>
>>>>> On Jan 8, 2009, at 11:34 AM, Emmanuel Baccelli wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>> On Jan 7, 2009, at 5:37 AM, JP Vasseur wrote:
>>>>>>
>>>>>> At this point, please very specific in what you want to see  
>>>>>> added to the document, which passed WG LC several weeks ago.  
>>>>>> We now need to quickly converge.
>>>>>>
>>>>>>
>>>>>>
>>>>>> OK, I'll be specific:
>>>>>>
>>>>>> 1- Everyone in the community agrees that no protocol (existing  
>>>>>> or near future) will pass ALL the criterias chosen by the draft.
>>>>>> 2- Requirements for ROLL are in fact more realistic, i.e.  
>>>>>> various SUBSETS of all these criterias.
>>>>>>
>>>>>> So in order to be unambiguous, the draft should thus  
>>>>>> explicitly spell out:
>>>>>>
>>>>>> 3- the different subsets of criterias that are in fact targeted,
>>>>>> 4- the evaluation of applicable protocols for each targeted  
>>>>>> subset.
>>>>>>
>>>>>> This way, I think we will indeed stop wasting time with this.
>>>>>>
>>>>>> Emmanuel
>>>>
>>>>
>>>> I am also looking forward to the next version of the draft. I  
>>>> have already signaled all of what I thought was important to  
>>>> mention, in order to get a useful document for the next phase of  
>>>> ROLL: identifying solutions for the sets of requirements  
>>>> described in the requirement drafts. I am looking forward to  
>>>> participating.
>>>> cheers,
>>>
>>> off-line ... c'est pas exactement ce que je proposais ... donc tu  
>>> n'es pas OK avec le plan propose ? Car la prochaine version est  
>>> la derniere (pas LC).
>>>
>>> Merci.
>>>
>>> JP.
>>>
>>>> Emmanuel
>>>>
>>>> _______________________________________________
>>>> Roll mailing list
>>>> Roll@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/roll
>>>
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
> _______________________________________________
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> Roll@ietf.org
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">I'm not Emmanuel :) but I'd =
like to actually *read* the updated I-D before pronouncing myself on if =
the I-D can go forward.<div><br></div><div>My position is that a lot of =
people have given a lot of good feedback to the current I-D, and that =
the WG chairs and authors have responded with "Ok, we'll produce an =
update based on this feedback".=A0</div><div><br></div><div>I appreciate =
that position, and have all the confidence that the authors will try to =
capture the feedback in their update as best they can. I think that it'd =
be unfair to the authors to not await and review this I-D before saying =
"yes" or "no".</div><div><br></div><div>I've been sitting quiet for a =
while, since I felt that I had given air to my concerns and that those =
were being listened to (even if not agreed with :) ) so repeating myself =
would not be helpful until an updated I-D was =
out.</div><div><br></div><div>As soon as a new I-D hits the servers, I =
shall jump on a review. I would, however, suggest if a bit more than a =
week of review time is allowed before the I-D is being sent to the IESG: =
I think that it'd be better if any concerns are aired and addressed =
within the WG rather than linger and have to be raised (and potentially =
cause problems) elsewhere within the circuit. A week is really short, =
and a lot of issues have been raised. I, for one, am traveling - writing =
this email from a hotel room in Beijing - and still want to give this =
document the cycles it, and the authors, =
deserve.<br><div><br></div><div>Sounds fair enough, =
no?</div><div><br></div><div>Thomas</div><div><br><div><div>On Jan 12, =
2009, at 18:54 PM, David E. Culler wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"> I think =
that you said "Yes, this ID can go forward".=A0 (I got lost in the =
multi-negatives.)<br> <br> Emmanuel Baccelli wrote: <blockquote =
cite=3D"mid:be8c8d780901120654m79c8e49fg636f9a877c175230@mail.gmail.com" =
type=3D"cite">Sorry about the misunderstanding. I do not disagree with =
the plan. What I meant was: I am looking forward to the revision of the =
draft, and to after rechartering.=A0My comments will be properly logged =
anyways, even if=A0they are not taken into account ;)=A0  <div><br>  =
</div>  <div>This document may be ill-conceived, but for me it does not =
alter the consensus on the fact that something specific=A0(at least an =
extension of an existing protocol) needs to be standardized for ROLL. =
Hence=A0it does not alter the fact=A0that rechartering is needed along =
the lines you proposed.</div>  <div><br>  <div>cheers<br>  =
<div>Emmanuel</div>  <div><br>  <br>  <div class=3D"gmail_quote">On Mon, =
Jan 12, 2009 at 2:48 PM, JP Vasseur <span dir=3D"ltr">&lt;<a =
moz-do-not-send=3D"true" href=3D"mailto:jvasseur@cisco.com" =
target=3D"_blank">jvasseur@cisco.com</a>></span> wrote:<br>  <blockquote =
class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 204, =
204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">    <div =
style=3D"">sorry for the "French Part". What I wrote was ... "thus you =
do not agree with the proposed plan ?"    <div>    <div>    <div><br>    =
<div>    <div>On Jan 12, 2009, at 2:44 PM, JP Vasseur wrote:</div>    =
<br>    <blockquote type=3D"cite">      <div style=3D""><br>      <div>  =
    <div>On Jan 12, 2009, at 11:51 AM, Emmanuel Baccelli wrote:</div>    =
  <br>      <blockquote type=3D"cite"><br>        <br>        <div =
class=3D"gmail_quote">On Mon, Jan 12, 2009 at 8:58 AM, JP Vasseur <span =
dir=3D"ltr">&lt;<a moz-do-not-send=3D"true" =
href=3D"mailto:jvasseur@cisco.com" =
target=3D"_blank">jvasseur@cisco.com</a>></span> wrote:<br>        =
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid =
rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">      =
    <div style=3D"">resending .. we need to move on.          <div><br>  =
        </div>          <div>Many Thanks.</div>          <div><br>       =
   </div>          <font color=3D"#888888">          <div>JP.</div>      =
    </font>          <div>          <div>          <div><br>          =
<div>          <div>On Jan 8, 2009, at 1:44 PM, JP Vasseur wrote:</div>  =
        <br>          <blockquote type=3D"cite">            <div =
style=3D"">Hi Emmanuel,            <div><br>            </div>           =
 <div>What have we=A0achieved=A0so far ?</div>            <div><br>      =
      </div>            <div>(1) We wrote a very detailed set of routing =
requirements (with MUST, SHOULD, ...) - lots of work from the WG.</div>  =
          <div>(2) We reached a consensus on the fact that no existing =
mature routing protocol exist today that satisfy the requirements of =
ROLL.</div>            <div>(3) We also agreed that existing protocols =
(AODV, OLSR, ...) are NOT at all excluded as the set of candidates (with =
protocol extensions) - (see the discussion with Thomas)</div>            =
<div><br>            </div>            <div>When we got chartered, we =
have been tasked to see=A0whether an existing routing protocol could =
satisfy our requirements. We could have taken the approach of =
considering all MUST, with subset on a per application basis, etc .. The =
WG rather decided to select a few (necessary but not sufficient) set of =
criterion derived from the requirements. The only objective of that I-D =
is to answer to this question.</div>            <div><br>            =
</div>            <div>Now, should ROLL be re-chartered to start some =
protocol work, there will obviously be several candidates to evaluate =
against the requirements <b>(we will exclusively be using the routing =
requirements)</b>. This includes existing protocol with extensions and =
potentially new protocol.</div>            <div><br>            </div>   =
         <div>Proposal</div>            <div>* Let's try to close on =
this I-D: hopefully, we managed to clarify the objective of that =
document (which might have been confusing and I understand your =
comments).</div>            <div>Steve told us that a new revision will =
be posted soon, addressing several comments including yours.</div>       =
     <div>The objective is to send the I-D for IESG review by end of =
next week (we completed LC on Dec 5),</div>            <div>* Send the =
rechartering proposal to the IESG (new WG item: Start protocol =
work),</div>            <div>* Immediately start evaluating solutions =
(existing (with the help on the appropriate WGs) and potentially new =
ones) in light of the application specific routing requirements).</div>  =
          <div>At that point, we may find out that more than one =
solution will be needed to satisfy the maximum number of MUST of =
application X and Y. We will figure this out at that point, but we of =
course first need to be re-chartered.</div>            <div><br>         =
   </div>            <div>Can we agree on this plan ?</div>            =
<div><br>            </div>            <div>Thanks.</div>            =
<div><br>            </div>            <div>JP.</div>            =
<div><br>            <div>            <div>On Jan 8, 2009, at 11:34 AM, =
Emmanuel Baccelli wrote:</div>            <br>            <blockquote =
type=3D"cite"> <br>              <div class=3D"gmail_quote">             =
 <blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid =
rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">      =
          <div>                <div><br> On Jan 7, 2009, at 5:37 AM, JP =
Vasseur wrote:                <blockquote class=3D"gmail_quote" =
style=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt =
0.8ex; padding-left: 1ex;">                  <br> At this point, please =
very specific in what you want to see added to the document, which =
passed WG LC several weeks ago. We now need to quickly converge.<br>     =
             <br>                </blockquote>                </div>     =
           </div>              </blockquote>              </div>         =
     <div><br>              </div>              <br>              =
<div>OK, I'll be specific:</div>              <div><br>              =
</div>              <div>1- Everyone in the community agrees that no =
protocol (existing or near future) will pass ALL the criterias chosen by =
the draft.</div>              <div>2- Requirements for ROLL are in fact =
more realistic, i.e. various SUBSETS of all these criterias.</div>       =
       <div><br>              </div>              <div>So in order to be =
unambiguous, the draft should thus explicitly spell out:</div>           =
   <div><br>              </div>              <div>3- the different =
subsets of criterias that are in fact targeted,</div>              =
<div>4- the evaluation of applicable protocols for each targeted =
subset.</div>              <div><br>              </div>              =
<div>This way, I think we will indeed stop wasting time with =
this.=A0</div>              <div><br>              </div>              =
<div>Emmanuel</div>            </blockquote>            </div>           =
 </div>            </div>          </blockquote>          </div>         =
 </div>          </div>          </div>          </div>        =
</blockquote>        <div><br>        </div>        <div>I am also =
looking forward to the next version of the draft. I have already =
signaled all of what I thought was important to mention, in order to get =
a useful document for the next phase of ROLL: identifying solutions for =
the sets of requirements described in the requirement drafts. I am =
looking forward to participating.</div>        <div>cheers,</div>        =
</div>      </blockquote>      <div><br>      </div>      <div>off-line =
... c'est pas exactement ce que je proposais ... donc tu n'es pas OK =
avec le plan propose ? Car la prochaine version est la derniere (pas =
LC).</div>      <div><br>      </div>      <div>Merci.</div>      =
<div><br>      </div>      <div>JP.</div>      <br>      <blockquote =
type=3D"cite">        <div class=3D"gmail_quote">        =
<div>Emmanuel</div>        </div>        <br> =
_______________________________________________<br> Roll mailing =
list<br>        <a moz-do-not-send=3D"true" href=3D"mailto:Roll@ietf.org" =
target=3D"_blank">Roll@ietf.org</a><br>        <a moz-do-not-send=3D"true"=
 href=3D"https://www.ietf.org/mailman/listinfo/roll" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/roll</a><br>     =
 </blockquote>      </div>      <br>      </div> =
_______________________________________________<br> Roll mailing =
list<br>      <a moz-do-not-send=3D"true" href=3D"mailto:Roll@ietf.org" =
target=3D"_blank">Roll@ietf.org</a><br>      <a moz-do-not-send=3D"true" =
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size=3D"4" width=3D"90%">_______________________________________________
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margin-left: 0px; "><a =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
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On Jan 12, 2009, at 7:30 PM, Thomas Heide Clausen wrote:

> I'm not Emmanuel :) but I'd like to actually *read* the updated I-D  
> before pronouncing myself on if the I-D can go forward.
>
> My position is that a lot of people have given a lot of good  
> feedback to the current I-D, and that the WG chairs and authors have  
> responded with "Ok, we'll produce an update based on this feedback".
>
> I appreciate that position, and have all the confidence that the  
> authors will try to capture the feedback in their update as best  
> they can. I think that it'd be unfair to the authors to not await  
> and review this I-D before saying "yes" or "no".
>
> I've been sitting quiet for a while, since I felt that I had given  
> air to my concerns and that those were being listened to (even if  
> not agreed with :) ) so repeating myself would not be helpful until  
> an updated I-D was out.
>
> As soon as a new I-D hits the servers, I shall jump on a review. I  
> would, however, suggest if a bit more than a week of review time is  
> allowed before the I-D is being sent to the IESG: I think that it'd  
> be better if any concerns are aired and addressed within the WG  
> rather than linger and have to be raised (and potentially cause  
> problems) elsewhere within the circuit. A week is really short, and  
> a lot of issues have been raised. I, for one, am traveling - writing  
> this email from a hotel room in Beijing - and still want to give  
> this document the cycles it, and the authors, deserve.
>
> Sounds fair enough, no?

I'll try to get the new version out tonight. Stephen and Arsalan have  
addressed almost all of the comments in our working copy; I just need  
to make a few last changes.

Phil

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Phil,

Sounds excellent, I'm looking forward to reviewing the update. Thanks  
in advance for your efforts (all of you) - I know that getting an  
avalanche of feedback and trying to make sense and structure of it is  
really hard work.

Cheers,

Thomas

On Jan 13, 2009, at 04:38 AM, Philip Levis wrote:

>
> On Jan 12, 2009, at 7:30 PM, Thomas Heide Clausen wrote:
>
>> I'm not Emmanuel :) but I'd like to actually *read* the updated I- 
>> D before pronouncing myself on if the I-D can go forward.
>>
>> My position is that a lot of people have given a lot of good  
>> feedback to the current I-D, and that the WG chairs and authors  
>> have responded with "Ok, we'll produce an update based on this  
>> feedback".
>>
>> I appreciate that position, and have all the confidence that the  
>> authors will try to capture the feedback in their update as best  
>> they can. I think that it'd be unfair to the authors to not await  
>> and review this I-D before saying "yes" or "no".
>>
>> I've been sitting quiet for a while, since I felt that I had given  
>> air to my concerns and that those were being listened to (even if  
>> not agreed with :) ) so repeating myself would not be helpful  
>> until an updated I-D was out.
>>
>> As soon as a new I-D hits the servers, I shall jump on a review. I  
>> would, however, suggest if a bit more than a week of review time  
>> is allowed before the I-D is being sent to the IESG: I think that  
>> it'd be better if any concerns are aired and addressed within the  
>> WG rather than linger and have to be raised (and potentially cause  
>> problems) elsewhere within the circuit. A week is really short,  
>> and a lot of issues have been raised. I, for one, am traveling -  
>> writing this email from a hotel room in Beijing - and still want  
>> to give this document the cycles it, and the authors, deserve.
>>
>> Sounds fair enough, no?
>
> I'll try to get the new version out tonight. Stephen and Arsalan  
> have addressed almost all of the comments in our working copy; I  
> just need to make a few last changes.
>
> Phil
>

_______________________________________________
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Begin forwarded message:

> From: IETF I-D Submission Tool <idsubmission@ietf.org>
> Date: January 12, 2009 10:33:38 PM PST
> To: internet-drafts@ietf.org
> Cc: pal@cs.stanford.edu,arsalan@eecs.berkeley.edu,stevedh@cs.berkeley.edu 
> ,jpv@cisco.com,culler@eecs.berkeley.edu
> Subject: Manual Post Requested for draft-ietf-roll-protocols-survey
>
> Manual Posting Requested for following Internet-Draft:
>
> I-D Submission Tool URL: https://datatracker.ietf.org/idst/status.cgi?submission_id=11815
>
>
> Filename:	   draft-ietf-roll-protocols-survey
> Version:	   03
> Staging URL:	   http://www3.ietf.org/proceedings/staging/draft-ietf-roll-protocols-survey-03.txt
> Title:		   Overview of Existing Routing Protocols for Low Power and  
> Lossy Networks
> Creation_date:	   2009-01-12
> WG ID:		   roll
> Number_of_pages: 25
> Abstract:
> Networks of low power wireless devices introduce novel IP routing
> issues.  Low-power wireless devices, such as sensors, actuators and
> smart objects, have difficult constraints: very limited memory,
> little processing power, and long sleep periods.  As most of these
> devices are battery-powered, energy efficiency is critically
> important.  Wireless link qualities can vary significantly over time,
> requiring protocols to make agile decisions yet minimize topology
> change energy costs.  Routing over such low power and lossy networks
> has novel requirements that existing protocols may not address.  This
> document provides a brief survey of the strengths and weaknesses of
> existing protocols with respect to this class of networks.  From this
> survey it examines whether existing protocols as described in RFCs
> and mature drafts could be used without modification in these
> networks, or whether further work is necessary.
>
> Submitter: Philip Levis (pal@cs.stanford.edu)
>
> Author(s):
> Philip Levis, pal@cs.stanford.edu
> Arsalan Tavakoli, arsalan@eecs.berkeley.edu
> Stephen Dawson-Haggerty, stevedh@cs.berkeley.edu
>
>
>

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--NextPart

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

	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-03.txt
	Pages		: 25
	Date		: 2009-1-14
	
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  From this
   survey it examines whether existing protocols as described in RFCs
   and mature drafts could be used without modification in these
   networks, or whether further work is necessary.

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This says:

  "We do not
   consider DTN bundles [RFC5050] or the DTN Licklider protocol
   [RFC5326] as suggested by the ROLL working group charter, because
   they are not routing protocols."

It is true that those are not routing protocols, but is a bit
of a silly thing to say. (Would you say that you didn't consider
UDP since it wasn't a routing protocol?) The relevant DTN
protocol to consider, or not, as you choose, is PRoPHET. [1]

Assuming you don't want to actually analyse PRoPHET for this
I-D, which is fine by me, I think what you want to say is something
like the following:

  "We omitted consideration of the DTN routing protocol PRoPHET [1]
   due to lack of time."

(And replace the "due to..." clause however you like.)

Stephen.

PS: Before some says "due to it being a -01 draft." Check out [2]
and its successors.

[1] http://tools.ietf.org/html/draft-irtf-dtnrg-prophet-01
[2] http://tools.ietf.org/html/draft-lindgren-dtnrg-prophet-00

Internet-Drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.
> 
> 	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-03.txt
> 	Pages		: 25
> 	Date		: 2009-1-14
> 	
> Networks of low power wireless devices introduce novel IP routing
>    issues.  Low-power wireless devices, such as sensors, actuators and
>    smart objects, have difficult constraints: very limited memory,
>    little processing power, and long sleep periods.  As most of these
>    devices are battery-powered, energy efficiency is critically
>    important.  Wireless link qualities can vary significantly over time,
>    requiring protocols to make agile decisions yet minimize topology
>    change energy costs.  Routing over such low power and lossy networks
>    has novel requirements that existing protocols may not address.  This
>    document provides a brief survey of the strengths and weaknesses of
>    existing protocols with respect to this class of networks.  From this
>    survey it examines whether existing protocols as described in RFCs
>    and mature drafts could be used without modification in these
>    networks, or whether further work is necessary.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-03.txt
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
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> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.


	Title           : Building Automation Routing Requirements in Low Power and Lossy Networks
	Author(s)       : J. Martocci, et al.
	Filename        : draft-ietf-roll-building-routing-reqs-02.txt
	Pages           : 27
	Date            : 2009-01-14

The Routing Over Low power and Lossy network (ROLL) Working Group has 
been chartered to work on routing solutions for Low Power and Lossy 
networks (LLN) in various markets: Industrial, Commercial (Building), 
Home and Urban. Pursuant to this effort, this document defines the 
routing requirements for building automation. 

Requirements Language 

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", 
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this 
document are to be interpreted as described in RFC-2119.

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From roll-bounces@ietf.org  Wed Jan 14 15:11:56 2009
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On Jan 14, 2009, at 10:38 AM, Stephen Farrell wrote:

>
> This says:
>
>  "We do not
>   consider DTN bundles [RFC5050] or the DTN Licklider protocol
>   [RFC5326] as suggested by the ROLL working group charter, because
>   they are not routing protocols."
>
> It is true that those are not routing protocols, but is a bit
> of a silly thing to say. (Would you say that you didn't consider
> UDP since it wasn't a routing protocol?) The relevant DTN
> protocol to consider, or not, as you choose, is PRoPHET. [1]
>
> Assuming you don't want to actually analyse PRoPHET for this
> I-D, which is fine by me, I think what you want to say is something
> like the following:
>
>  "We omitted consideration of the DTN routing protocol PRoPHET [1]
>   due to lack of time."
>
> (And replace the "due to..." clause however you like.)
>
> Stephen.
>
> PS: Before some says "due to it being a -01 draft." Check out [2]
> and its successors.

Stephen,

Do you feel it would be fair to say

"We do not consider the DTN routing protocol PRoPHET [x] because it is  
predicated on the non-randomness of human mobility, which does not  
exist in many LLN application domains."

or do you feel that is an incorrect characterization? I'm drawing from  
the first paragraph of 2.1 in version -01:

    This section presents an overview of the main architecture of
    PRoPHET, a Probabilistic Routing Protocol using History of  
Encounters
    and Transitivity.  The protocol leverages the observations made on
    the non-randomness of human mobility to improve routing performance.
    Instead of doing blind epidemic replication of messages through the
    network as previous protocols have done, it applies 'probabilistic
    routing'.

Phil
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Dear WG,

WG Last Call for this I-D ended on Dec 5, and we received several  
comments that have been addressed in this revision on the document (to  
be confirmed by the authors of these comments of course). We had in- 
depth discussion on this document (good !) and now need to move on.  
The objective is to send the document to the IESG for publication  
(informational track) at the latest by end of next week. Thanks for  
the authors of the comments to provide some feed-back by June 22,  
preferably earlier.

Thanks.

JP.

Begin forwarded message:

> From: Internet-Drafts@ietf.org
> Date: January 15, 2009 12:00:02 AM CEST
> To: i-d-announce@ietf.org
> Cc: roll@ietf.org
> Subject: [Roll] I-D Action:draft-ietf-roll-building-routing- 
> reqs-02.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts  
> directories.
> This draft is a work item of the Routing Over Low power and Lossy  
> networks Working Group of the IETF.
>
>
> 	Title           : Building Automation Routing Requirements in Low  
> Power and Lossy Networks
> 	Author(s)       : J. Martocci, et al.
> 	Filename        : draft-ietf-roll-building-routing-reqs-02.txt
> 	Pages           : 27
> 	Date            : 2009-01-14
>
> The Routing Over Low power and Lossy network (ROLL) Working Group has
> been chartered to work on routing solutions for Low Power and Lossy
> networks (LLN) in various markets: Industrial, Commercial (Building),
> Home and Urban. Pursuant to this effort, this document defines the
> routing requirements for building automation.
>
> Requirements Language
>
> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
> document are to be interpreted as described in RFC-2119.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routing-reqs-02.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Dear WG,<div><br></div><div>WG =
Last Call for this I-D ended on Dec 5, and we received several comments =
that have been addressed in this revision on the document (to be =
confirmed by the authors of these comments of course). We had in-depth =
discussion on this document (good !) and now need to move on. The =
objective is to send the document to the IESG for publication =
(informational track) at the latest by end of next week. Thanks for the =
authors of the comments to provide some feed-back by June 22, preferably =
earlier.</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.<br>=
<div><br><div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>From: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><a =
href=3D"mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a></fon=
t></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" =
color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>Date: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica">January 15, 2009 12:00:02 AM =
CEST</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"4" color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>To: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a></font></di=
v><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Cc: </b></font><font =
face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:roll@ietf.org">roll@ietf.org</a></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Subject: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><b>[Roll] I-D =
Action:draft-ietf-roll-building-routing-reqs-02.txt</b></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div> </div><div>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.<br>This draft is a work item of the Routing Over Low power =
and Lossy networks Working Group of the IETF.<br><br><br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Title =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: Building =
Automation Routing Requirements in Low Power and Lossy Networks<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Author(s) =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: J. Martocci, et al.<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Filename =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
draft-ietf-roll-building-routing-reqs-02.txt<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Pages =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
27<br><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Date =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
2009-01-14<br><br>The Routing Over Low power and Lossy network (ROLL) =
Working Group has <br>been chartered to work on routing solutions for =
Low Power and Lossy <br>networks (LLN) in various markets: Industrial, =
Commercial (Building), <br>Home and Urban. Pursuant to this effort, this =
document defines the <br>routing requirements for building automation. =
<br><br>Requirements Language <br><br>The key words "MUST", "MUST NOT", =
"REQUIRED", "SHALL", "SHALL NOT", <br>"SHOULD", "SHOULD NOT", =
"RECOMMENDED", "MAY", and "OPTIONAL" in this <br>document are to be =
interpreted as described in RFC-2119.<br><br>A URL for this =
Internet-Draft is:<br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routi=
ng-reqs-02.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-buildi=
ng-routing-reqs-02.txt</a><br><br>Internet-Drafts are also available by =
anonymous FTP at:<br>ftp://ftp.ietf.org/internet-drafts/<br><br>Below is =
the data which will enable a MIME compliant mail =
reader<br>implementation to automatically retrieve the ASCII version of =
the<br>Internet-Draft.<br></div></blockquote></div></div></body></html>=

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<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><blockquote type="cite"><div>_______________________________________________<br>Roll mailing list<br>Roll@ietf.org<br>https://www.ietf.org/mailman/listinfo/roll<br></div></blockquote></div><br></div></body></html>
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_______________________________________________
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From roll-bounces@ietf.org  Wed Jan 14 22:02:31 2009
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From: Philip Levis <pal@cs.stanford.edu>
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On Jan 14, 2009, at 10:15 AM, Internet-Drafts@ietf.org wrote:

> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Routing Over Low power and Lossy  
> networks Working Group of the IETF.
>
> 	Title		: Overview of Existing Routing Protocols for Low Power and  
> Lossy Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-03.txt
> 	Pages		: 25
> 	Date		: 2009-1-14
> 	
> Networks of low power wireless devices introduce novel IP routing
>   issues.  Low-power wireless devices, such as sensors, actuators and
>   smart objects, have difficult constraints: very limited memory,
>   little processing power, and long sleep periods.  As most of these
>   devices are battery-powered, energy efficiency is critically
>   important.  Wireless link qualities can vary significantly over  
> time,
>   requiring protocols to make agile decisions yet minimize topology
>   change energy costs.  Routing over such low power and lossy networks
>   has novel requirements that existing protocols may not address.   
> This
>   document provides a brief survey of the strengths and weaknesses of
>   existing protocols with respect to this class of networks.  From  
> this
>   survey it examines whether existing protocols as described in RFCs
>   and mature drafts could be used without modification in these
>   networks, or whether further work is necessary.

Stephen, Arsalan and I tried to address all of the comments made on  
version -02. Notably, as per Stephen's Dec 19 mail:

   - OSPF changed to OSPF/IS-IS, explain the distinctions and why the  
analysis is the same
   - Notes justifying why we don't look at NEMO/DTN (verbatim from JP,  
Phil) since they're in the charter.
   - Update the "control cost" metric: note that this metric is  
"necessary but not sufficient"
   - Be a more explicit about reqs and limitations in the intro.
   - Update DYMO to talk about distance, not hopcount
   - T. Clausen's long email (most should have been considered &  
addressed)
   - OLSRv2 changed to ? in the control cost metric, because it might  
be possible to pass with the right sort of aging of updates. ("Fisheye  
State Routing in Mobile Ad Hoc Networks").  It would almost certainly  
require a new specification to say how to do this in a correct and  
inoperable way, but might not violate the specification.  manet-fsr-00  
seems like it has not been updated in quite a while.  FSR does not  
alter the "table scalability "; it's not claimed in the paper.

One outstanding comment is Stephen Farrell's on the DTN discussion. I  
hope to (on his reply) incorporate a change on this ASAP and have  
another revision on Friday. All other comments/feedback welcome.

Phil


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Philip Levis wrote:
> "We do not consider the DTN routing protocol PRoPHET [x] because it is
> predicated on the non-randomness of human mobility, which does not exist
> in many LLN application domains."

That'd be a less embarrassing post-facto justification all right.
I still think what I said is more accurate, but if you're happy to
say that that's why you didn't include PRoPHET, then ok.

As a nit I'd s/human mobility/node mobility/ in the above though,
since humans aren't actually necessary for PRoPHET. You might
also want to s/predicated on/designed for/ as well.

Stephen.

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Subject: Re: [Roll] Closing on draft-ietf-roll-building-routing-reqs-02.txt
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> WG Last Call for this I-D ended on Dec 5, and we received several
comments
> that have been addressed in this revision on the document (to be
confirmed
> by the authors of these comments of course). We had in-depth
discussion on
> this document (good !) and now need to move on. The objective is to
send
> the document to the IESG for publication (informational track) at the
latest
> by end of next week. Thanks for the authors of the comments to provide
some
> feed-back by June 22, preferably earlier.

January 22 I assume ;)

I have read through it and, subject to all the comments previously
made about interpretation, future plans etc., I didn't find anything
that I felt required an -04. I did find a couple of things that I was
going to say "if doing an -04 for some other reason, you might consider
this". As the DTN comments made elsewhere may suggest an -04, I'll
note them here.

Abstract. Personally I would delete "novel". The remaining text still
makes it clear that things are different, but it's not really that
the requirements are novel, it's the combination and the importance
that are different.

Section 1 third paragraph. When I see "Furthermore" I assume that the
second point builds on the first, but here it is quite independent.
But I wouldn't like to try to defend that assumption as being definitely
correct.

Section 1 fifth paragraph, "extenuating" is I think the wrong word.
It suggests that using a new protocol is a guilty action, but you
may get let off. Maybe some see it that way!

********************************************************************
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recipient and may also be privileged. If you are not the intended
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Subject: Re: [Roll] Closing on draft-ietf-roll-building-routing-reqs-02.txt
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Hi Christopher,

On Jan 15, 2009, at 3:54 PM, Dearlove, Christopher (UK) wrote:

>
>> WG Last Call for this I-D ended on Dec 5, and we received several
> comments
>> that have been addressed in this revision on the document (to be
> confirmed
>> by the authors of these comments of course). We had in-depth
> discussion on
>> this document (good !) and now need to move on. The objective is to
> send
>> the document to the IESG for publication (informational track) at the
> latest
>> by end of next week. Thanks for the authors of the comments to  
>> provide
> some
>> feed-back by June 22, preferably earlier.
>
> January 22 I assume ;)
>

yes indeed, thanks.

> I have read through it and, subject to all the comments previously
> made about interpretation, future plans etc., I didn't find anything
> that I felt required an -04. I did find a couple of things that I was
> going to say "if doing an -04 for some other reason, you might  
> consider
> this". As the DTN comments made elsewhere may suggest an -04, I'll
> note them here.
>

Let me make sure I understand. You mean a version -03 ? Yes, within  
the next few days
to address potential last comments.

> Abstract. Personally I would delete "novel". The remaining text still
> makes it clear that things are different, but it's not really that
> the requirements are novel, it's the combination and the importance
> that are different.
>
> Section 1 third paragraph. When I see "Furthermore" I assume that the
> second point builds on the first, but here it is quite independent.
> But I wouldn't like to try to defend that assumption as being  
> definitely
> correct.
>
> Section 1 fifth paragraph, "extenuating" is I think the wrong word.
> It suggests that using a new protocol is a guilty action, but you
> may get let off. Maybe some see it that way!

That should be easy to address by the authors.

Thanks.

JP.

>
>
> ********************************************************************
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> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

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Subject: [Roll] WG Last Call on draft-ietf-roll-building-routing-reqs-02
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Dear WG,

As you probably saw a new revision of draft-ietf-roll-building-routing- 
reqs-02 has been posted and the I-D is now ready for WG Last call.

This starts a 2-week last call ending on January 30 at 9:00am ET.

Please send your comments to the authors and the list.

Thanks.

JP.
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Sorry ... the comment was right but for the wrong I-D. Of course this  
email was for the protocol survey, not draft-ietf-roll-building- 
routing-reqs-02.txt that was just last called.

Thanks.

JP.

On Jan 15, 2009, at 6:56 AM, JP Vasseur wrote:

> Dear WG,
>
> WG Last Call for this I-D ended on Dec 5, and we received several  
> comments that have been addressed in this revision on the document  
> (to be confirmed by the authors of these comments of course). We had  
> in-depth discussion on this document (good !) and now need to move  
> on. The objective is to send the document to the IESG for  
> publication (informational track) at the latest by end of next week.  
> Thanks for the authors of the comments to provide some feed-back by  
> June 22, preferably earlier.
>
> Thanks.
>
> JP.
>
> Begin forwarded message:
>
>> From: Internet-Drafts@ietf.org
>> Date: January 15, 2009 12:00:02 AM CEST
>> To: i-d-announce@ietf.org
>> Cc: roll@ietf.org
>> Subject: [Roll] I-D Action:draft-ietf-roll-building-routing- 
>> reqs-02.txt
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts  
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy  
>> networks Working Group of the IETF.
>>
>>
>> 	Title           : Building Automation Routing Requirements in Low  
>> Power and Lossy Networks
>> 	Author(s)       : J. Martocci, et al.
>> 	Filename        : draft-ietf-roll-building-routing-reqs-02.txt
>> 	Pages           : 27
>> 	Date            : 2009-01-14
>>
>> The Routing Over Low power and Lossy network (ROLL) Working Group has
>> been chartered to work on routing solutions for Low Power and Lossy
>> networks (LLN) in various markets: Industrial, Commercial (Building),
>> Home and Urban. Pursuant to this effort, this document defines the
>> routing requirements for building automation.
>>
>> Requirements Language
>>
>> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
>> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
>> document are to be interpreted as described in RFC-2119.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routing-reqs-02.txt
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> Below is the data which will enable a MIME compliant mail reader
>> implementation to automatically retrieve the ASCII version of the
>> Internet-Draft.
> Content-Type: text/plain<BR>Content-ID: &lt;2009-01-14145307.I-D@ietf.org 
> &gt;<BR><BR>
>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


--Apple-Mail-373-408033376
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	charset=US-ASCII
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Sorry ... the comment was right =
but for the wrong I-D. Of course this email was for the protocol survey, =
not&nbsp;draft-ietf-roll-building-routing-reqs-02.txt that was just last =
called.<div><br></div><div>Thanks.</div><div><br></div><div>JP.</div><div>=
<br><div><div>On Jan 15, 2009, at 6:56 AM, JP Vasseur wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Dear WG,<div><br></div><div>WG =
Last Call for this I-D ended on Dec 5, and we received several comments =
that have been addressed in this revision on the document (to be =
confirmed by the authors of these comments of course). We had in-depth =
discussion on this document (good !) and now need to move on. The =
objective is to send the document to the IESG for publication =
(informational track) at the latest by end of next week. Thanks for the =
authors of the comments to provide some feed-back by June 22, preferably =
earlier.</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.<br>=
<div><br><div>Begin forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>From: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><a =
href=3D"mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a></fon=
t></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" =
color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>Date: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica">January 15, 2009 12:00:02 AM =
CEST</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"4" color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>To: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a></font></di=
v><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Cc: </b></font><font =
face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:roll@ietf.org">roll@ietf.org</a></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Subject: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><b>[Roll] I-D =
Action:draft-ietf-roll-building-routing-reqs-02.txt</b></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div> </div><div>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.<br>This draft is a work item of the Routing Over Low power =
and Lossy networks Working Group of the IETF.<br><br><br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Title =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: Building =
Automation Routing Requirements in Low Power and Lossy Networks<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Author(s) =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: J. Martocci, et al.<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Filename =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
draft-ietf-roll-building-routing-reqs-02.txt<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Pages =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
27<br><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Date =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
2009-01-14<br><br>The Routing Over Low power and Lossy network (ROLL) =
Working Group has <br>been chartered to work on routing solutions for =
Low Power and Lossy <br>networks (LLN) in various markets: Industrial, =
Commercial (Building), <br>Home and Urban. Pursuant to this effort, this =
document defines the <br>routing requirements for building automation. =
<br><br>Requirements Language <br><br>The key words "MUST", "MUST NOT", =
"REQUIRED", "SHALL", "SHALL NOT", <br>"SHOULD", "SHOULD NOT", =
"RECOMMENDED", "MAY", and "OPTIONAL" in this <br>document are to be =
interpreted as described in RFC-2119.<br><br>A URL for this =
Internet-Draft is:<br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routi=
ng-reqs-02.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-buildi=
ng-routing-reqs-02.txt</a><br><br>Internet-Drafts are also available by =
anonymous FTP at:<br><a =
href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-d=
rafts/</a><br><br>Below is the data which will enable a MIME compliant =
mail reader<br>implementation to automatically retrieve the ASCII =
version of =
the<br>Internet-Draft.<br></div></blockquote></div></div></div>Content-Typ=
e: text/plain&lt;BR>Content-ID: &amp;lt;<a =
href=3D"mailto:2009-01-14145307.I-D@ietf.org">2009-01-14145307.I-D@ietf.or=
g</a>&amp;gt;&lt;BR>&lt;BR><br><br><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div><blockquote =
type=3D"cite"><div>_______________________________________________<br>Roll=
 mailing list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></div></blockquote></div><br></div></div>__________=
_____________________________________<br>Roll mailing list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
ilman/listinfo/roll<br></blockquote></div><br></div></body></html>=

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_______________________________________________
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https://www.ietf.org/mailman/listinfo/roll

--===============0557859279==--


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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-03.txt
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> Dear WG,
>
> WG Last Call for this I-D ended on Dec 5, and we received several  
> comments that have been addressed in this revision on the document  
> (to be confirmed by the authors of these comments of course). We had  
> in-depth discussion on this document (good !) and now need to move  
> on. The objective is to send the document to the IESG for  
> publication (informational track) at the latest by end of next week.  
> Thanks for the authors of the comments to provide some feed-back by  
> June 22, preferably earlier.
>
> Thanks.
>
> JP.
>

On Jan 14, 2009, at 7:15 PM, internet-drafts@ietf.org wrote:

> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Routing Over Low power and Lossy  
> networks Working Group of the IETF.
>
> 	Title		: Overview of Existing Routing Protocols for Low Power and  
> Lossy Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-03.txt
> 	Pages		: 25
> 	Date		: 2009-1-14
> 	
> Networks of low power wireless devices introduce novel IP routing
>   issues.  Low-power wireless devices, such as sensors, actuators and
>   smart objects, have difficult constraints: very limited memory,
>   little processing power, and long sleep periods.  As most of these
>   devices are battery-powered, energy efficiency is critically
>   important.  Wireless link qualities can vary significantly over  
> time,
>   requiring protocols to make agile decisions yet minimize topology
>   change energy costs.  Routing over such low power and lossy networks
>   has novel requirements that existing protocols may not address.   
> This
>   document provides a brief survey of the strengths and weaknesses of
>   existing protocols with respect to this class of networks.  From  
> this
>   survey it examines whether existing protocols as described in RFCs
>   and mature drafts could be used without modification in these
>   networks, or whether further work is necessary.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-03.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.
> <mime-attachment>_______________________________________________
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> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

_______________________________________________
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Philip Levis a =E9crit :
> =

> On Dec 15, 2008, at 3:23 AM, Emmanuel Baccelli wrote:
> =

>> =

>> =

>> On Thu, Dec 11, 2008 at 9:52 PM, David E. Culler =

>> <culler@eecs.berkeley.edu> wrote: Emmanuel, We discussed the list =

>> of rows in each of the IETF meetings and associated discussions =

>> leading up to those.   It sounds like you agree that if you have =

>> some criteria for limiting the search space the discussion will =

>> never complete.   That is necessary, according to the charter, to =

>> consider the space of solutions that might actually solve the =

>> problem.  To do any analysis there has to be something specific to =

>> analyze.  You mention two addition WGs that have done relevant =

>> work. Indeed, from the very beginning it was stated that Roll =

>> should work in conjunction with those groups.  It is key another =

>> thing to say "this specific protocol as described by this RFC or =

>> I-D ought to be analyzed in draft-ietf-roll-protocols-survey-03".
>> =

>> Here's the NEMO list.  Which are you arguing should be included and
>>  why?
>> =

>> =

>> Sorry to be blunt, but your charter says that DTN and NEMO are to =

>> be reviewed as well as the rest. There is not a word about either =

>> of these "fields" in the draft, why? You need to answer this =

>> question. Not me.
> =

> I thought the draft is very explicit:
> =

> This document considers "existing routing protocols" to be protocols
>  that are specified in RFCs or, in the cases of DYMO =

> [I-D.ietf-manet-dymo] or OLSRv2 [I-D.ietf-manet-olsrv2] , a very =

> mature draft which will most likely become an RFC.  This document =

> does not seek to answer the question of whether there is any protocol
>  anywhere which could meet LLN application requirements.  Rather, it
>  seeks to answer whether protocols, as specified in current IETF =

> standards documents, can meet such requirements.
> =

> In the case of DTN, it's IRTF.
> =

> In the case of NEMO, it is not a routing protocol.

Sorry, late, browsing the ROLL discussions.

NEMO not a routing protocol?  What's a routing protocol anyways.  NEMOv6
  extension to Mobile IPv6 may affect the routing tables, or affects the
binding cache with prefixes, which is a routing-related data structure.

Home Agent 'forwards' packets according to rules in its binding cache...

A question that may be raised is whether a NEMO-like structure (a set
of nodes moving together, 'represented' by its mobile router moving with
them) may get formed in the LLN deployments and at the same time that
LLN must be connected to the Internet.  If both conditions are met then
NEMO concepts and NEMOv6 protocol may be needed for LLN.

Alex

> =

> When the charter was written, the initial thought was that reviewing =

> those protocols seemed like a good idea. We did. But after further =

> examination and discussion, both on the mailing list at at IETF =

> meetings, the WG reached consensus that the current methodology for =

> the *routing protocol survey* is the right one. Because neither is a =

> standards-track routing protocol, their mechanisms do not help answer
> the question of whether ROLL needs to recharter for protocol design.
> Rather, they might be part of the next step, which is to examine
> existing mechanisms and protocols to see how protocol design should
> go forward.
> =

> Phil _______________________________________________ Roll mailing =

> list Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
> =



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David E. Culler a =E9crit :

>  Here's the NEMO list.  Which are you arguing should be included and why?

RFC3963 NEMOv6 base spec should be included because:

-it and not RFC5177 NEMOv4 because ROLL does IPv6 only
-if there is a chance that a LLN network may contain groups of entities
  moving together (a moving network) and at the same time LLN is
  connected to the Internet then Mobile IPv6 with its NEMOv6 extensions
  may look attractive.
-if the latter condition is not satisfied it still makes sense to talk
  about moving network concepts, in the sense that one entity may be in
  charge of all entities in the moving network, without necessarily using
  Mobile IPv6 protocol nor NEMOv6.

Alex

> draft-ietf-nemo-basic-support =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-basic-support/> 	-03 =

> <http://tools.ietf.org/html/draft-ietf-nemo-basic-support> 	=

> 	2004-06-07   	RFC 3963 <http://tools.ietf.org/html/rfc3963> 	=

> draft-ietf-nemo-home-network-models =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-home-network-models/> =

> -06 <http://tools.ietf.org/html/draft-ietf-nemo-home-network-models> 	=

> 	2006-02-21   	RFC 4887 <http://tools.ietf.org/html/rfc4887> 	=

> draft-ietf-nemo-multihoming-issues =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-multihoming-issues/> 	-07 =

> <http://tools.ietf.org/html/draft-ietf-nemo-multihoming-issues> 	=

> 	2007-02-07   	RFC 4980 <http://tools.ietf.org/html/rfc4980> 	=

> draft-ietf-nemo-requirements =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-requirements/> 	-06 =

> <http://tools.ietf.org/html/draft-ietf-nemo-requirements> 	=

> 	2006-11-09   	RFC 4886 <http://tools.ietf.org/html/rfc4886> 	=

> draft-ietf-nemo-ro-problem-statement =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-ro-problem-statement/> =

> -03 <http://tools.ietf.org/html/draft-ietf-nemo-ro-problem-statement> 	=

> 	2006-09-18   	RFC 4888 <http://tools.ietf.org/html/rfc4888> 	=

> draft-ietf-nemo-ro-space-analysis =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-ro-space-analysis/> 	-03 =

> <http://tools.ietf.org/html/draft-ietf-nemo-ro-space-analysis> 	=

> 	2006-09-18   	RFC 4889 <http://tools.ietf.org/html/rfc4889> 	=

> draft-ietf-nemo-terminology =

> <http://tools.ietf.org/wg/nemo/draft-ietf-nemo-terminology/> 	-06 =

> <http://tools.ietf.org/html/draft-ietf-nemo-terminology> 	=

> 	2006-11-09   	RFC 4885 <http://tools.ietf.org/html/rfc4885> 	=

> =

> =

> There are many topics that as a working group we'd like to move on to =

> once this process completes.  Much important work has been done outside =

> IETF WGs.  Some of it in the IRTF.  Others in other places.  All the =

> more reason to complete this well formed, bounded effort.   Again, I do =

> not hear any suggestion that any protocol within the domain of analysis =

> meets the criteria.  I do hear that there are protocols or modifications =

> to protocols that do or could.  We need to complete the process on this =

> draft so that we can move on to consider such enhancements, candidates, =

> or new designs. =

> =

> =

> On Thu, Dec 11, 2008 at 4:09 PM, Emmanuel Baccelli <emmanuel.baccelli at =

> gmail.com <mailto:emmanuel.baccelli%20at%20gmail.com>> wrote:
> =

> =

> =

>     On Tue, Dec 9, 2008 at 11:28 PM, David E. Culler <culler at
>     eecs.berkeley.edu <mailto:culler%20at%20eecs.berkeley.edu>> wrote:
> =

> =

>         Some concerns recognize that there are protocols outside the
>         defined universe that should be considered and that appear to be
>         far better suited to meeting the criteria than the set of IETF
>         protocols that were considered - since those protocols were
>         developed without these criteria.  Again, that suggests that the
>         criteria are a reasonable guide, that they do not appear to be
>         unobtainable, and that the analysis has provided a suitable guide.
> =

>         None of the comments seem to be claiming that there is a
>         solution within the universe that we were chartered to consider
>         that meets the criteria.
> =

> =

>  =

> Even admitting that the universe you defined is wide enough (a point =

> which is actually agued since months), we could conclude to this only if =

> this universe (defined in the charter) is covered entirely. Again, it is =

> not the case: I have seen nothing said about NEMO or DTN, so reports of =

> investigations in these fields need to be included in the draft anyways.
> =

> Second, if we are not going into a long research phase, I am still =

> wondering what existing protocols/algorithms, IP compatible or not, are =

> being "hinted at" here, which could meet the "dream" criterii that are =

> evoked in the draft. Chris Dearlove and other people have asked this =

> question many times, and it is yet to be answered.
> =

> Emmanuel
> =

> =

> ------------------------------------------------------------------------
> =

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


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It's true: I'd like NEMOv6 extensions to Mobile IPv6 to be used
everywhere, it can do everything.

But it's also true that some other times the tunnelling of Mobile IPv6
and triangular routing through HA may prove unnecessary constraints 
when its requirements (permanent unique globally reachable Home Address 
and session continuity without app changes) are not valid, for example 
in ROLL WG.

That said, I have comments on the following paragraph:
> We do not examine the Network Mobility Basic Support Protocol (NEMO 
> RFC 3963 [RFC3963]) because it is not a routing protocol.  We do not 
> examine hierarchical NEMO [I-D.thubert-tree-discovery] as a candidate
>  because it only maintains a default route and so is insufficient for
>  general routing.  Although NEMO itself is not a suitable routing 
> solution to LLNs, some of its mechanisms, such as loop-free tree 
> formation, might be useful in an LLN routing protocol.

IT is difficult to agree that NEMOv6 rfc3963 is _not_ a routing 
protocol, as long as we don't know the definition of a routing protocol. 
   NEMOv6 has prefixes in the exchanged messages, affects routing tables 
and binding caches, spans wide Internet areas, decrements TTL, etc.

As opposed to the entrenched Hierarchical Mobile IP term the 
Hierarchical NEMO is not used in the common NEMO parlance, never heard 
of it.

Loop-free formation is not a characteristic of the NEMOv6 protocol.  It 
is a characteristic of the concept of moving networks represented by one 
Mobile Router moving with them.  It is very well possible to demonstrate 
how two Mobile Routers serving two different moving networks move in 
such a way that a deadlock situation is created because a loop of paths 
is formed ("Stalemate" in Appendix B of RFC4888 "Network Mobility Route 
Optimization Problem Statement").

Despite the numerous individual proposals for Route Optimzation 
techniques for NEMOv6 protocol, none is currently commonly agreed, no WG 
document on that.  The Route Optimization problem is hard to solve for 
NEMOv6, especially because of security constraints of 
across-the-Internet communications.

Which leads to the last question of this table:
>     Protocol      Table   Loss  Control   Link Cost  Node Cost
>      OSPF/IS-IS    fail    fail    fail      pass       fail
>      OLSRv2        fail    fail     ?        pass       pass
>      TBRPF         fail    pass    fail      pass        ?
>      RIP           pass    fail    pass       ?         fail
>      AODV          pass    fail    pass      fail       fail
>      DYMO[-low]    pass    fail    pass       ?         fail
>      DSR           fail    pass    pass      fail       fail

Why there's no Security column?  Something suggesting that some protocol 
is more advantageous because it addresses some security requirements 
while others don't.

Alex

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On Jan 16, 2009, at 9:35 AM, Alexandru Petrescu wrote:

> David E. Culler a =E9crit :
>
>> Here's the NEMO list.  Which are you arguing should be included and  =

>> why?
>
> RFC3963 NEMOv6 base spec should be included because:
>
> -it and not RFC5177 NEMOv4 because ROLL does IPv6 only
> -if there is a chance that a LLN network may contain groups of  =

> entities
> moving together (a moving network) and at the same time LLN is
> connected to the Internet then Mobile IPv6 with its NEMOv6 extensions
> may look attractive.
> -if the latter condition is not satisfied it still makes sense to talk
> about moving network concepts, in the sense that one entity may be in
> charge of all entities in the moving network, without necessarily  =

> using
> Mobile IPv6 protocol nor NEMOv6.

The question is not whether NEMO or some variant thereof might be  =

relevant in an LLN. The question, with respect to this draft, is  =

whether ROLL could adopt NEMO unchanged as the routing protocol for  =

LLNs. "If there is a chance" and "may look attractive" mean that NEMO  =

might be relevant to the next step of discussion, but are not relevant  =

now. Do you agree? Please read the full document.

Phil
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On Jan 16, 2009, at 9:57 AM, Alexandru Petrescu wrote:

> It's true: I'd like NEMOv6 extensions to Mobile IPv6 to be used
> everywhere, it can do everything.
>
> But it's also true that some other times the tunnelling of Mobile IPv6
> and triangular routing through HA may prove unnecessary constraints  
> when its requirements (permanent unique globally reachable Home  
> Address and session continuity without app changes) are not valid,  
> for example in ROLL WG.
>
> That said, I have comments on the following paragraph:
>> We do not examine the Network Mobility Basic Support Protocol (NEMO  
>> RFC 3963 [RFC3963]) because it is not a routing protocol.  We do  
>> not examine hierarchical NEMO [I-D.thubert-tree-discovery] as a  
>> candidate
>> because it only maintains a default route and so is insufficient for
>> general routing.  Although NEMO itself is not a suitable routing  
>> solution to LLNs, some of its mechanisms, such as loop-free tree  
>> formation, might be useful in an LLN routing protocol.
>
> IT is difficult to agree that NEMOv6 rfc3963 is _not_ a routing  
> protocol, as long as we don't know the definition of a routing  
> protocol.   NEMOv6 has prefixes in the exchanged messages, affects  
> routing tables and binding caches, spans wide Internet areas,  
> decrements TTL, etc.

I guess we're getting a bit sophistic here. NEMO does not qualify  
because it tunnels on top of an underlying routing protocol. So while  
it might be a routing protocol in the way that you describe, it is  
routing on top of routing topology, and we first need that underlying  
topology. RFC 3963:

Section 1:

"The solution described in this document proposes a bi-directional
tunnel between the Mobile Router and its Home Agent.  This tunnel is
set up when the Mobile Router sends a successful Binding Update to
its Home Agent, informing the Home Agent of its current point of
attachment."

Section 3:

"A Mobile Network is a network segment or subnet that can move and
attach to arbitrary points in the routing infrastructure."

"When a Correspondent Node sends a data packet to a node in the Mobile
Network, the packet is routed to the Home Agent that currently has
the binding for the Mobile Router."



> Which leads to the last question of this table:
>>    Protocol      Table   Loss  Control   Link Cost  Node Cost
>>     OSPF/IS-IS    fail    fail    fail      pass       fail
>>     OLSRv2        fail    fail     ?        pass       pass
>>     TBRPF         fail    pass    fail      pass        ?
>>     RIP           pass    fail    pass       ?         fail
>>     AODV          pass    fail    pass      fail       fail
>>     DYMO[-low]    pass    fail    pass       ?         fail
>>     DSR           fail    pass    pass      fail       fail
>
> Why there's no Security column?  Something suggesting that some  
> protocol is more advantageous because it addresses some security  
> requirements while others don't.

Have you read the full document? "Necessary but not sufficient" is the  
phrase to keep in mind. We've gone over this at least a half dozen  
times now.

Phil
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Philip Levis a =E9crit :
> =

> On Jan 16, 2009, at 9:35 AM, Alexandru Petrescu wrote:
> =

>> David E. Culler a =E9crit :
>> =

>>> Here's the NEMO list.  Which are you arguing should be included
>>> and why?
>> =

>> RFC3963 NEMOv6 base spec should be included because:
>> =

>> -it and not RFC5177 NEMOv4 because ROLL does IPv6 only -if there is
>> a chance that a LLN network may contain groups of entities moving
>> together (a moving network) and at the same time LLN is connected
>> to the Internet then Mobile IPv6 with its NEMOv6 extensions may
>> look attractive. -if the latter condition is not satisfied it still
>> makes sense to talk about moving network concepts, in the sense
>> that one entity may be in charge of all entities in the moving
>> network, without necessarily using Mobile IPv6 protocol nor NEMOv6.
>> =

> =

> The question is not whether NEMO or some variant thereof might be =

> relevant in an LLN. The question, with respect to this draft, is
> whether ROLL could adopt NEMO unchanged as the routing protocol for
> LLNs.

Why there's no NEMOv6 protocol in the '(in)famous' table?

> "If there is a chance" and "may look attractive" mean that NEMO might
> be relevant to the next step of discussion, but are not relevant now.
> Do you agree? Please read the full document.

I'm looking at it... thanks for the comments.

My comments are for the archives.

I understand there's a hard deadline happening as we speak: no =

opposition from my side.

Alex


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Philip Levis a =E9crit :
> On Jan 16, 2009, at 9:57 AM, Alexandru Petrescu wrote:
> =

>> It's true: I'd like NEMOv6 extensions to Mobile IPv6 to be used =

>> everywhere, it can do everything.
>> =

>> But it's also true that some other times the tunnelling of Mobile
>> IPv6 and triangular routing through HA may prove unnecessary
>> constraints when its requirements (permanent unique globally
>> reachable Home Address and session continuity without app changes)
>> are not valid, for example in ROLL WG.
>> =

>> That said, I have comments on the following paragraph:
>>> We do not examine the Network Mobility Basic Support Protocol
>>> (NEMO RFC 3963 [RFC3963]) because it is not a routing protocol.
>>> We do not examine hierarchical NEMO [I-D.thubert-tree-discovery]
>>> as a candidate because it only maintains a default route and so
>>> is insufficient for general routing.  Although NEMO itself is not
>>> a suitable routing solution to LLNs, some of its mechanisms, such
>>> as loop-free tree formation, might be useful in an LLN routing
>>> protocol.
>> =

>> IT is difficult to agree that NEMOv6 rfc3963 is _not_ a routing =

>> protocol, as long as we don't know the definition of a routing =

>> protocol.   NEMOv6 has prefixes in the exchanged messages, affects
>>  routing tables and binding caches, spans wide Internet areas, =

>> decrements TTL, etc.
> =

> I guess we're getting a bit sophistic here. NEMO does not qualify =

> because it tunnels on top of an underlying routing protocol.

OSPF tunnels on top of a routing Bluetooth MAC protocol - why does it
qualify instead?

> So while it might be a routing protocol in the way that you describe,
> it is routing on top of routing topology, and we first need that
> underlying topology.

Some link-layers 'route'.  Are the link-layer methods of routing out of =

scope for ROLL?  Just for my clarification.

Alex


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On Jan 16, 2009, at 10:30 AM, Alexandru Petrescu wrote:

>
> OSPF tunnels on top of a routing Bluetooth MAC protocol - why does it
> qualify instead?

OSPF does a lot more than that... points below.

>
>
>> So while it might be a routing protocol in the way that you describe,
>> it is routing on top of routing topology, and we first need that
>> underlying topology.
>
> Some link-layers 'route'.  Are the link-layer methods of routing out  
> of scope for ROLL?  Just for my clarification.

Do you mean switching? Sure, all routing layers can work on top of  
switching, as multiple link hops look like a single IP hop. The fact  
that OSPF can work on top of a bluetooth switching network doesn't  
mean that it's not a routing protocol, any more than the fact that an  
end-host's default route goes through several switches means that it's  
not routing based on a netmask.

This discussion went on when ROLL chartered. The terms used were "mesh  
under" for layer 2 switching and "route over" for IP routing. The  
IETF's purview (a few aberrant exceptions aside) is layer 3 and above,  
so mesh under is not within the scope of ROLL.

Phil
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On Jan 16, 2009, at 18:32 PM, Alexandru Petrescu wrote:

> Philip Levis a =E9crit :
>> On Dec 15, 2008, at 3:23 AM, Emmanuel Baccelli wrote:
>>> On Thu, Dec 11, 2008 at 9:52 PM, David E. Culler  =

>>> <culler@eecs.berkeley.edu> wrote: Emmanuel, We discussed the list  =

>>> of rows in each of the IETF meetings and associated discussions  =

>>> leading up to those.   It sounds like you agree that if you have  =

>>> some criteria for limiting the search space the discussion will  =

>>> never complete.   That is necessary, according to the charter, to  =

>>> consider the space of solutions that might actually solve the  =

>>> problem.  To do any analysis there has to be something specific  =

>>> to analyze.  You mention two addition WGs that have done relevant  =

>>> work. Indeed, from the very beginning it was stated that Roll  =

>>> should work in conjunction with those groups.  It is key another  =

>>> thing to say "this specific protocol as described by this RFC or  =

>>> I-D ought to be analyzed in draft-ietf-roll-protocols-survey-03".
>>> Here's the NEMO list.  Which are you arguing should be included and
>>>  why?
>>> Sorry to be blunt, but your charter says that DTN and NEMO are to  =

>>> be reviewed as well as the rest. There is not a word about either  =

>>> of these "fields" in the draft, why? You need to answer this  =

>>> question. Not me.
>> I thought the draft is very explicit:
>> This document considers "existing routing protocols" to be protocols
>>  that are specified in RFCs or, in the cases of DYMO [I-D.ietf- =

>> manet-dymo] or OLSRv2 [I-D.ietf-manet-olsrv2] , a very mature  =

>> draft which will most likely become an RFC.  This document does  =

>> not seek to answer the question of whether there is any protocol
>>  anywhere which could meet LLN application requirements.  Rather, it
>>  seeks to answer whether protocols, as specified in current IETF  =

>> standards documents, can meet such requirements.
>> In the case of DTN, it's IRTF.
>> In the case of NEMO, it is not a routing protocol.
>
> Sorry, late, browsing the ROLL discussions.
>
> NEMO not a routing protocol?  What's a routing protocol anyways.

Alex, you ask a good question. You could also ask "what is a router  =

anyways". As I see it, you'll get at least three different answers  =

depending on whom you'll ask, for example for a router, you could get:

	o	something running the router portion of NDP
	o	something forwarding traffic not destined to itself
	o	something running a routing protocol

(I think that a major source of confusion in also the "MANEMO"  =

discussions are found in different people picking different of the  =

above as the "right" definition of a "router" and making assumptions  =

based on this)

However, while it's interesting to try to understand what different  =

communities intend, I'm not sure that this is conductive to the work  =

of this wg.

> NEMOv6
>  extension to Mobile IPv6 may affect the routing tables, or affects  =

> the
> binding cache with prefixes, which is a routing-related data  =

> structure.

A common "academic" position would be something akin to "routing  =

protocol is a path finding algorithm, plus the information exchange  =

necessary for that algorithm to operate". An equally valid position  =

could be "something which affects routing tables". I'm sure that one  =

can come up with others....

But, while the discussion is interesting, I'm not sure that ROLL is  =

chartered to enumerate and document these positions?

Thomas


> Home Agent 'forwards' packets according to rules in its binding  =

> cache...
>
> A question that may be raised is whether a NEMO-like structure (a set
> of nodes moving together, 'represented' by its mobile router moving  =

> with
> them) may get formed in the LLN deployments and at the same time that
> LLN must be connected to the Internet.  If both conditions are met  =

> then
> NEMO concepts and NEMOv6 protocol may be needed for LLN.
>
> Alex
>
>> When the charter was written, the initial thought was that  =

>> reviewing those protocols seemed like a good idea. We did. But  =

>> after further examination and discussion, both on the mailing list  =

>> at at IETF meetings, the WG reached consensus that the current  =

>> methodology for the *routing protocol survey* is the right one.  =

>> Because neither is a standards-track routing protocol, their  =

>> mechanisms do not help answer
>> the question of whether ROLL needs to recharter for protocol design.
>> Rather, they might be part of the next step, which is to examine
>> existing mechanisms and protocols to see how protocol design should
>> go forward.
>> Phil _______________________________________________ Roll mailing  =

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

_______________________________________________
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Date: Sat, 17 Jan 2009 06:40:20 +0100
To: Philip Levis <pal@cs.stanford.edu>
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On Jan 16, 2009, at 19:01 PM, Philip Levis wrote:

>
> On Jan 16, 2009, at 9:35 AM, Alexandru Petrescu wrote:
>
>> David E. Culler a =E9crit :
>>
>>> Here's the NEMO list.  Which are you arguing should be included =20
>>> and why?
>>
>> RFC3963 NEMOv6 base spec should be included because:
>>
>> -it and not RFC5177 NEMOv4 because ROLL does IPv6 only
>> -if there is a chance that a LLN network may contain groups of =20
>> entities
>> moving together (a moving network) and at the same time LLN is
>> connected to the Internet then Mobile IPv6 with its NEMOv6 extensions
>> may look attractive.
>> -if the latter condition is not satisfied it still makes sense to =20
>> talk
>> about moving network concepts, in the sense that one entity may be in
>> charge of all entities in the moving network, without necessarily =20
>> using
>> Mobile IPv6 protocol nor NEMOv6.
>
> The question is not whether NEMO or some variant thereof might be =20
> relevant in an LLN. The question, with respect to this draft, is =20
> whether ROLL could adopt NEMO unchanged as the routing protocol for =20=

> LLNs. "If there is a chance" and "may look attractive" mean that =20
> NEMO might be relevant to the next step of discussion, but are not =20
> relevant now. Do you agree? Please read the full document.

Phil,

(side-note, I've read the updated I-D and will send detailed comments =20=

later, hopefully this weekend. On the whole, I think this last edit =20
is a good improvement, so kudos).

I'm torn as to if I agree with you or Alex here, as you both have a =20
point. In this kind of I-Ds, what we don't write is often more =20
dangerous than what we do write. *IF* the WG feels that a variation =20
of NEMO might make a candidate for solution-space work, *THEN* I fear =20=

that disregarding it in this I-D may guide subsequent work away from =20
NEMO.

The "offending" paragrap would, I suspect, be thisone:

    We do not examine the Network Mobility Basic Support Protocol (NEMO
    RFC 3963 [RFC3963]) because it is not a routing protocol.  We do not
    examine hierarchical NEMO [I-D.thubert-tree-discovery] as a =20
candidate
    because it only maintains a default route and so is insufficient for
    general routing.  Although NEMO itself is not a suitable routing
    solution to LLNs, some of its mechanisms, such as loop-free tree
    formation, might be useful in an LLN routing protocol.

If the WG considers investigating NEMO, then a softening of this =20
paragraph may be in order?

Note: I do not have a personal opinion on the applicability of NEMO =20
in this matter, I'm just observing that the above paragraph seems to =20
exclude NEMO-variations for future work (despite the last sentence).

Cheers,

Thomas



--Apple-Mail-4-460549870
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
 <br><div><div>On Jan 16, 2009, at 19:01 PM, Philip Levis =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">On Jan 16, 2009, at 9:35 AM, Alexandru Petrescu =
wrote:</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> =
<blockquote type=3D"cite"><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; ">David E. Culler a =E9crit =
:</div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; min-height: 14px; "><br></div> <blockquote =
type=3D"cite"><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">Here's the NEMO list.<span =
class=3D"Apple-converted-space">=A0 </span>Which are you arguing should =
be included and why?</div> </blockquote><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">RFC3963 NEMOv6 base spec should =
be included because:</div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">-it and not RFC5177 NEMOv4 =
because ROLL does IPv6 only</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">-if there is =
a chance that a LLN network may contain groups of entities</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">moving together (a moving network) and at the same =
time LLN is</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">connected to the Internet then =
Mobile IPv6 with its NEMOv6 extensions</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">may look =
attractive.</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">-if the latter condition is not =
satisfied it still makes sense to talk</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">about =
moving network concepts, in the sense that one entity may be =
in</div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; ">charge of all entities in the moving network, =
without necessarily using</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Mobile IPv6 =
protocol nor NEMOv6.</div> </blockquote><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">The question is not whether NEMO =
or some variant thereof might be relevant in an LLN. The question, with =
respect to this draft, is whether ROLL could adopt NEMO unchanged as the =
routing protocol for LLNs. "If there is a chance" and "may look =
attractive" mean that NEMO might be relevant to the next step of =
discussion, but are not relevant now. Do you agree? Please read the full =
document.</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"></div></blockquote><br></div><div>Phil,</div><div><br></div><div>(side-n=
ote, I've read the updated I-D and will send detailed comments later, =
hopefully this weekend. On the whole, I think this last edit is a good =
improvement, so kudos).</div><div><br></div><div>I'm torn as to if I =
agree with you or Alex here, as you both have a point. In this kind of =
I-Ds, what we don't write is often more dangerous than what we do write. =
*IF* the WG feels that a variation of NEMO might make a candidate for =
solution-space work, *THEN* I fear that disregarding it in this I-D may =
guide subsequent work away from NEMO.</div><div><br></div><div>The =
"offending" paragrap would, I suspect, be =
thisone:</div><div><br></div><div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
face=3D"Courier" size=3D"4" style=3D"font: 13.0px Courier">=A0=A0=A0We =
do not examine the Network Mobility Basic Support Protocol =
(NEMO</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Courier" size=3D"4" =
style=3D"font: 13.0px Courier">=A0=A0 RFC 3963 [RFC3963]) because it is =
not a routing protocol.=A0 We do not</font></div><div style=3D"margin-top:=
 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
face=3D"Courier" size=3D"4" style=3D"font: 13.0px Courier">=A0=A0 =
examine hierarchical NEMO [I-D.thubert-tree-discovery] as a =
candidate</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Courier" size=3D"4" =
style=3D"font: 13.0px Courier">=A0=A0 because it only maintains a =
default route and so is insufficient for</font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Courier" size=3D"4" style=3D"font: =
13.0px Courier">=A0=A0 general routing.=A0 Although NEMO itself is not a =
suitable routing</font></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
face=3D"Courier" size=3D"4" style=3D"font: 13.0px Courier">=A0=A0 =
solution to LLNs, some of its mechanisms, such as loop-free =
tree</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Courier" size=3D"4" =
style=3D"font: 13.0px Courier">=A0=A0 formation, might be useful in an =
LLN routing protocol.</font></div></div><div><br></div><div>If the WG =
considers investigating NEMO, then a softening of this paragraph may be =
in order?</div><div><br></div><div>Note: I do not have a personal =
opinion on the applicability of NEMO in this matter, I'm just observing =
that the above paragraph seems to exclude NEMO-variations for future =
work (despite the last =
sentence).</div><div><br></div><div>Cheers,</div><div><br></div><div>Thoma=
s</div><div><br></div><br></body></html>=

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Cc: "David E. Culler" <culler@eecs.berkeley.edu>
Subject: [Roll] Comments on draft-ietf-roll-building-routing-reqs-02.txt
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Hi,

First of all thanks for the hard work and several revisions addressing  
many comments. There are still several comments to address.

Please find below my WG LC comments:

1) Section 1

"For description of the terminology used in this specification, please
    see the Terminology ID referenced in Section 10.1. "
Please add the reference instead of mentioning Section 10.1.
s/"see the Terminology ID referenced in Section 10.1"/"see [I-D.ietf- 
roll-terminology]"
2) Section 2
Right after "Sensing devices may be battery or mains powered.   
Actuators and area
    controllers will be mains powered. "
Please add: "Still it is envisioned to see a mix of wired and wireless  
sensors and actuators in buildings".
3) Section 2
"Facility Management Systems (FMS) are deployed in a large set of
    vertical markets including universities; hospitals; government
    facilities; Kindergarten through High School (K-12); pharmaceutical
    manufacturing facilities; and single-tenant or multi-tenant office
    buildings."
JP> Shouldn't you replace the ";" by "," ?
4) Section 2
Right after "The following sections describe the sensor, actuator,  
area controller
    and zone controller layers of the topology.  (NOTE: The Building
    Controller and Enterprise layers of the FMS are excluded from this
    discussion since they typically deal in communication rates  
requiring
    WLAN communication technologies).  "
JP> Please add a note to mention that this material is provided mainly  
for educational purposes and the routing requirements are detailed in  
section 3.
JP> Then add "The aim of this document is to provide the set of IPv6  
routing requirements for LLN in buildings".

5) I would suggest a slightly different organization ...
* Leave the introduction (up to section 2.1 not included) and make the  
suggested changes above,
* Rename section 2.1 (Facility Management System (FMS) Topology ) =>  
Section 3
* Move the current Section 3 to Appendix B ("An example of building  
automation: the art centre of Vooruit". As such it comes a bit out of  
the blue.

6) On Section 3 (to become appendix):
* s/""popcorn effect" draft"/"popcorn effect"
* There is no word on routing: could you provide some routing  
characteristics in this network (number of hops, devices, ...) ?

Comments on the routing requirements
################################

7) "It MUST be possible to fully commission network devices without
    requiring any additional commissioning device (e.g. laptop). The
    device MAY support up to sixteen integrated switches to uniquely
    identify the device on the network. "
JP> How does the "MAY" translate to routing requirements ?
8) Please reword "Routing
    MUST recognize the constraints associated the power budget of such
    low duty cycle devices."
The routing protocol MUST take into account device characteristics  
such as "power budget".
9) "If the mechanisms for duty cycling dictate very long response  
times or specific temporal
    scheduling, routing and forwarding will need to take such  
constraints
    into account. "
JP> Please remove "forwarding"
10) "Communication to these mostly sleeping devices MUST be  
bidirectional."
JP> Please be more specific. Do you mean by the routing protocol MUST  
be able to compute bi-directional route to sleeping devices ? Why ?
11) "In such cases, routing MUST recognize the selected proxy
    for the sleeping device. "
JP> "recognize" in which way ? Can you be more specific ?
12) "Routing must allow for temporary ad hoc paths to be
    established that are updated as the network physically and
    functionally expands. "
JP> This can be a very stringent requirements (although there is no  
normative language).
13) Section 4.1.4: not a routing requirements
14) Section 4.2
"The routing protocol MUST be able to support networks with at least
    1000 routers and 1000 hosts. "
If a host is not "routing" no need to mention the number of hosts.  
What matters in this section is the number of routers in the LLN. Same  
comments for the number of sensors.
15) Section 4.3
"Mobile devices SHOULD be capable of unjoining (handing-off) from an
    old network joining onto a new network within 15 seconds.
"
JP> You may want to elaborate a little bit on hat you mean by  
"unjoining". Does that mean that the routing protocol must converge  
within 15s after the removal of the device ?

16) "The routing mechanisms MUST
    therefore be tailored to fit these resource constrained devices.  "
JP> This is certainly true but how does this translate to a routing  
requirement ? 10000 times less memory than a several GBytes routers ?  
Since you provide number hereafter, please delete this sentence.
17) In Sections 4.4.1 and 4.4.2, what do you mean by "software stack":  
OS+entire protocol stack ?
18) "Routing MUST support anycast, unicast, multicast and broadcast
    services (or IPv6 equivalent). "
JP> This must be changed ... there is no broadcast in IPv6 (and we are  
exclusively working on IPv6) but IPv6 is using multicast (RFC2373).  
Just remove "broadcast".
19) "4.6.1. Firmware Upgrades

    To support high speed code downloads, routing MUST support  
transports
    that provide parallel downloads to targeted devices yet guarantee
    packet delivery. "
JP> This is clearly a device requirement not a routing requirements. I  
would suggest to delete.
20) "4.6.2. Diagnostics

    To improve diagnostics, the network layer SHOULD be able to be  
placed
    in and out of 'verbose' mode.  Verbose mode is a temporary debugging
    mode that provides additional communication information including at
    least total number of packets sent, packets received, number of
    failed communication attempts, neighbor table and routing table
    entries. "
JP> This is an important requirement. Please just keep the routing  
aspects.
21) "4.6.3. Route Tracking

    Route diagnostics SHOULD be supported providing information such as
    path quality; number of hops; available alternate active paths with
    associated costs. "
JP> Please define "path quality".
22) Section 4.7
JP> I understand your concern but this is not a routing requirement  
either. The IETF specifies IP-based protocol and cannot depend on non- 
IP protocols. I would suggest to remove that section.
23) Section 4.7.1
Per our charter, we exclusively focus on IPv6. Furthermore, the term  
intercommunication is ambiguous. I would suggest to delete 4.7.1
24) Section 4.7.2
"Routing MUST support packet sizes to 1526 octets (to be backwards
    compatible with 802.3 subnetworks) "
JP> Please remove the text in parenthesis. Strictly speaking the ROLL  
protocol(s) will not be backward compatible with 802.3.
25) "Route discovery occurring during packet
    transmission MUST not exceed 120 msecs."
JP> I would suggest to slightly reword since it gives the impression  
that you mandate a reactive routing mechanism.
26) "4.8.5. Route Preference

    The route discovery mechanism SHOULD allow a source node (sensor) to
    dictate a configured destination node (controller) as a preferred
    routing path. "
JP> mmm ... what do you mean by "dictate a configured destination node  
as a preferred path ?". Do you mean that the routing protocol SHOULD  
allow for routing along a configured path on the source ?
27) "4.8.6. Path Persistence

    To eliminate high network traffic in power-fail or brown-out
    conditions previously established routes SHOULD be remembered and
    invoked prior to establishing new routes for those devices  
reentering
    the network. "
JP> This is a device / implementation-specific choice. Should be  
removed.
28) Please remove Section 6
29) Security.
JP> Don't you have any security requirements ? Could you please look at:
http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-reqs-03.txt
http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-reqs-03.txt
http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routing-reqs-06.txt
to see if you do not have security requirements along those lines ?
30) Please remove (see comments number 32 below)
     See Appendix A for additional requirements
    that have been deemed outside the scope of this document yet will
    pertain to the successful deployment of building automation systems.
31) References

Please reformat the references section to list the relevant details of  
each document + add a normative reference to RFC 2119.

For example:

10.  References

10.1.  Normative References

    [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

10.2.  Informative References

    [I-D.ietf-roll-home-routing-reqs]
               Brandt, A., Buron, J., and G. Porcu, "Home Automation
               Routing Requirements in Low Power and Lossy Networks",
               draft-ietf-roll-home-routing-reqs-06 (work in progress),
               November 2008.

32) Appendix A
The requirements will need to
    be addressed by ROLL or other WGs before adoption by the building
    automation industry will be considered.
JP> Please remove, since ROLL is about routing, thus we will not be  
chartered to address non routing requirements.
Giving more thoughts, this appendix does provide very useful and well  
documented data. That being said, they do not really belong to this  
document and may introduce confusion. I would suggest to remove this  
appendix from the document.


Thanks.

JP.


Begin forwarded message:

> From: Internet-Drafts@ietf.org
> Date: January 15, 2009 12:00:02 AM CEST
> To: i-d-announce@ietf.org
> Cc: roll@ietf.org
> Subject: [Roll] I-D Action:draft-ietf-roll-building-routing- 
> reqs-02.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts  
> directories.
> This draft is a work item of the Routing Over Low power and Lossy  
> networks Working Group of the IETF.
>
>
> 	Title           : Building Automation Routing Requirements in Low  
> Power and Lossy Networks
> 	Author(s)       : J. Martocci, et al.
> 	Filename        : draft-ietf-roll-building-routing-reqs-02.txt
> 	Pages           : 27
> 	Date            : 2009-01-14
>
> The Routing Over Low power and Lossy network (ROLL) Working Group has
> been chartered to work on routing solutions for Low Power and Lossy
> networks (LLN) in various markets: Industrial, Commercial (Building),
> Home and Urban. Pursuant to this effort, this document defines the
> routing requirements for building automation.
>
> Requirements Language
>
> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
> document are to be interpreted as described in RFC-2119.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routing-reqs-02.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi,<div><br></div><div>First of =
all thanks for the hard work and several revisions addressing many =
comments. There are still several comments to =
address.</div><div><br></div><div>Please find below my WG LC =
comments:</div><div><br></div><div>1) Section =
1</div><div><br></div><div>"<span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap; ">For description of the terminology =
used in this specification, please </span></div><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   see the Terminology ID referenced in =
Section 10.1. "</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">Please add the reference instead of =
mentioning Section 10.1.</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">s/"see the Terminology ID referenced in =
Section 10.1"/"see [I-D.ietf-roll-terminology]"</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">2) Section =
2</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">Right after "Sensing devices may be battery or mains powered.  =
Actuators and area </span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   controllers will be mains powered. =
"</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">Please add: "Still it is envisioned to see a mix of wired and =
wireless sensors and actuators in buildings".</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">3) Section =
2</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">"Facility Management Systems (FMS) are deployed in a large set of =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 vertical markets including universities; hospitals; government=20
   facilities; Kindergarten through High School (K-12); pharmaceutical=20=

   manufacturing facilities; and single-tenant or multi-tenant office=20
   buildings."</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> Shouldn't you replace the ";" by "," =
?</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">4) Section 2</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">Right after "The following sections describe =
the sensor, actuator, area controller </span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">   and zone =
controller layers of the topology.  (NOTE: The Building=20
   Controller and Enterprise layers of the FMS are excluded from this=20
   discussion since they typically deal in communication rates requiring=20=

   WLAN communication technologies).  "</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> Please add a =
note to mention that this material is provided mainly for educational =
purposes and the routing requirements are detailed in section =
3.</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">JP> Then add "The aim of this document is to provide the set of =
IPv6 routing requirements for LLN in =
buildings".</span></font></pre><div><br></div><div>5) I would suggest a =
slightly different organization ...</div><div>* Leave the introduction =
(up to section 2.1 not included) and make the suggested changes =
above,</div><div>* Rename section 2.1 (<span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap; ">Facility Management System (FMS) =
Topology ) =3D> Section 3</span></div><div>* Move the current Section 3 =
to Appendix B ("An example of building automation: the art centre of =
Vooruit". As such it comes a bit out of the =
blue.</div><div><br></div><div>6) On Section 3 (to become =
appendix):</div><div>* s/"<span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap; ">"popcorn effect" draft"/"popcorn =
effect"</span></div><div>* There is no word on routing: could you =
provide some routing characteristics in this network (number of hops, =
devices, ...) ?</div><div><br></div><div>Comments on the routing =
requirements</div><div>################################</div><div><br></di=
v><div>7) "<span class=3D"Apple-style-span" style=3D"white-space: =
pre-wrap; ">It MUST be possible to fully commission network devices =
without </span></div><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 requiring any additional commissioning device (e.g. laptop). The=20
   device MAY support up to sixteen integrated switches to uniquely=20
   identify the device on the network. "</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> How does the =
"MAY" translate to routing requirements ?</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">8) Please reword =
"Routing </span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   MUST recognize the constraints associated =
the power budget of such=20
   low duty cycle devices."</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">The routing protocol MUST take into account =
device characteristics such as "power budget".</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">9) "If the =
mechanisms for duty cycling dictate very long response times or specific =
temporal </span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   scheduling, routing and forwarding will =
need to take such constraints=20
   into account. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> Please remove =
"forwarding"</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">10) "Communication to these mostly sleeping =
devices MUST be bidirectional."</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> Please be more =
specific. Do you mean by the routing protocol MUST be able to compute =
bi-directional route to sleeping devices ? Why ?</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">11) "In such =
cases, routing MUST recognize the selected proxy =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 for the sleeping device. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> "recognize" in which way ? Can you be =
more specific ?</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">12) "Routing must allow for temporary ad hoc =
paths to be </span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   established that are updated as the =
network physically and=20
   functionally expands. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> This can be a very stringent requirements =
(although there is no normative language). </span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">13) Section 4.1.4: =
not a routing requirements</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">14) Section 4.2</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">"The routing =
protocol MUST be able to support networks with at least =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 1000 routers and 1000 hosts. "</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">If a host is not =
"routing" no need to mention the number of hosts. What matters in this =
section is the number of routers in the LLN. Same comments for the =
number of sensors.</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">15) Section 4.3</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">"Mobile devices =
SHOULD be capable of unjoining (handing-off) from an =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 old network joining onto a new network within 15 seconds.=20
</span></font></pre><div><span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap;">"</span></div><div><span =
class=3D"Apple-style-span" style=3D"white-space: pre-wrap;">JP> You may =
want to elaborate a little bit on hat you mean by "unjoining". Does that =
mean that the routing protocol must converge within 15s after the =
removal of the device ?</span></div><div><span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap;"><br></span></div><div><span =
class=3D"Apple-style-span" style=3D"white-space: pre-wrap;">16) "The =
routing mechanisms MUST </span></div><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   therefore be tailored to fit these =
resource constrained devices.  "</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> This is =
certainly true but how does this translate to a routing requirement ? =
10000 times less memory than a several GBytes routers ? Since you =
provide number hereafter, please delete this =
sentence.</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">17) In Sections 4.4.1 and 4.4.2, what do you =
mean by "software stack": OS+entire protocol stack =
?</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">18) "Routing MUST support anycast, unicast, multicast and =
broadcast </span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">   services (or IPv6 equivalent). =
"</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">JP> This must be changed ... there is no broadcast in IPv6 (and =
we are exclusively working on IPv6) but IPv6 is using multicast =
(RFC2373). Just remove "broadcast".</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">19) "4.6.1. =
Firmware Upgrades </span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">
   To support high speed code downloads, routing MUST support transports=20=

   that provide parallel downloads to targeted devices yet guarantee=20
   packet delivery. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> This is clearly a device requirement not =
a routing requirements. I would suggest to =
delete.</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">20) "4.6.2. Diagnostics =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">
   To improve diagnostics, the network layer SHOULD be able to be placed=20=

   in and out of 'verbose' mode.  Verbose mode is a temporary debugging=20=

   mode that provides additional communication information including at=20=

   least total number of packets sent, packets received, number of=20
   failed communication attempts, neighbor table and routing table=20
   entries. "</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> This is an important requirement. Please =
just keep the routing aspects.</span></font></pre><pre style=3D"word-wrap:=
 break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">21) "4.6.3. Route Tracking =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">
   Route diagnostics SHOULD be supported providing information such as=20=

   path quality; number of hops; available alternate active paths with=20=

   associated costs. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> Please define "path =
quality".</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">22) Section 4.7</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> I understand =
your concern but this is not a routing requirement either. The IETF =
specifies IP-based protocol and cannot depend on non-IP protocols. I =
would suggest to remove that section.</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">23) Section =
4.7.1</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">Per our charter, we exclusively focus on =
IPv6. Furthermore, the term intercommunication is ambiguous. I would =
suggest to delete 4.7.1</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">24) Section 4.7.2</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">"Routing MUST =
support packet sizes to 1526 octets (to be backwards =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">  =
 compatible with 802.3 subnetworks) "</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> Please remove =
the text in parenthesis. Strictly speaking the ROLL protocol(s) will not =
be backward compatible with 802.3.</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">25) "Route =
discovery occurring during packet </span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">   transmission =
MUST not exceed 120 msecs."</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> I would suggest to slightly reword since =
it gives the impression that you mandate a reactive routing =
mechanism.</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">26) "4.8.5. Route Preference =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">
   The route discovery mechanism SHOULD allow a source node (sensor) to=20=

   dictate a configured destination node (controller) as a preferred=20
   routing path. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> mmm ... what do you mean by "dictate a =
configured destination node as a preferred path ?". Do you mean that the =
routing protocol SHOULD allow for routing along a configured path on the =
source ?</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">27) "4.8.6. Path Persistence =
</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: 14px;">
   To eliminate high network traffic in power-fail or brown-out=20
   conditions previously established routes SHOULD be remembered and=20
   invoked prior to establishing new routes for those devices reentering=20=

   the network. "</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> This is a device / =
implementation-specific choice. Should be =
removed.</span></font></pre><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">28) Please remove Section =
6</span></font></pre><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">29) Security.</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">JP> Don't you have any security requirements =
? Could you please look at:</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;"><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-=
reqs-03.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-rou=
ting-reqs-03.txt</a></span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;"><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-=
reqs-03.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-rou=
ting-reqs-03.txt</a></span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;"><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routing-r=
eqs-06.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routi=
ng-reqs-06.txt</a></span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">to see if you do not have security =
requirements along those lines ?</span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><span =
class=3D"Apple-style-span" style=3D"white-space: normal; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">30) Please remove =
(see comments number 32 below)</span></font></span></pre><div><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">    See Appendix A =
for additional requirements=20
   that have been deemed outside the scope of this document yet will=20
   pertain to the successful deployment of building automation systems. =
</span></font></pre></div><div>31) =
References</div><div><br></div><div>Please reformat the references =
section to list the relevant details of each document + add a normative =
reference to RFC 2119.</div><div><br></div><div>For =
example:</div><div><br></div><div><pre style=3D"word-wrap: break-word; =
white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">10.  References

10.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

10.2.  Informative References

   [I-D.ietf-roll-home-routing-reqs]
              Brandt, A., Buron, J., and G. Porcu, "Home Automation
              Routing Requirements in Low Power and Lossy Networks",
              draft-ietf-roll-home-routing-reqs-06 (work in progress),
              November 2008.</span></font></pre><div><br></div><div>32) =
Appendix A</div><div><pre style=3D"word-wrap: break-word; white-space: =
pre-wrap; "><font class=3D"Apple-style-span" face=3D"Helvetica" =
size=3D"4"><span class=3D"Apple-style-span" style=3D"font-size: =
14px;">The requirements will need to=20
   be addressed by ROLL or other WGs before adoption by the building=20
   automation industry will be considered. </span></font></pre><pre =
style=3D"word-wrap: break-word; white-space: pre-wrap; "><font =
class=3D"Apple-style-span" face=3D"Helvetica" size=3D"4"><span =
class=3D"Apple-style-span" style=3D"font-size: 14px;">JP> Please remove, =
since ROLL is about routing, thus we will not be chartered to address =
non routing requirements.</span></font></pre><pre style=3D"word-wrap: =
break-word; white-space: pre-wrap; "><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"4"><span class=3D"Apple-style-span" =
style=3D"font-size: 14px;">Giving more thoughts, this appendix does =
provide very useful and well documented data. That being said, they do =
not really belong to this document and may introduce confusion. I would =
suggest to remove this appendix from the =
document.</span></font></pre></div><div><br></div><div><br></div><div>Than=
ks.</div><div><br></div><div>JP.</div><div><br></div><div><br><div>Begin =
forwarded message:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>From: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><a =
href=3D"mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a></fon=
t></div><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" =
color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>Date: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica">January 15, 2009 12:00:02 AM =
CEST</font></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"4" color=3D"#000000" style=3D"font: 14.0px Helvetica; color: =
#000000"><b>To: </b></font><font face=3D"Helvetica" size=3D"4" =
style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a></font></di=
v><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Cc: </b></font><font =
face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px Helvetica"><a =
href=3D"mailto:roll@ietf.org">roll@ietf.org</a></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"4" color=3D"#000000" =
style=3D"font: 14.0px Helvetica; color: #000000"><b>Subject: =
</b></font><font face=3D"Helvetica" size=3D"4" style=3D"font: 14.0px =
Helvetica"><b>[Roll] I-D =
Action:draft-ietf-roll-building-routing-reqs-02.txt</b></font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div> </div><div>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.<br>This draft is a work item of the Routing Over Low power =
and Lossy networks Working Group of the IETF.<br><br><br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Title =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: Building =
Automation Routing Requirements in Low Power and Lossy Networks<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Author(s) =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: J. Martocci, et al.<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Filename =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
draft-ietf-roll-building-routing-reqs-02.txt<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>Pages =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
27<br><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Date =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: =
2009-01-14<br><br>The Routing Over Low power and Lossy network (ROLL) =
Working Group has <br>been chartered to work on routing solutions for =
Low Power and Lossy <br>networks (LLN) in various markets: Industrial, =
Commercial (Building), <br>Home and Urban. Pursuant to this effort, this =
document defines the <br>routing requirements for building automation. =
<br><br>Requirements Language <br><br>The key words "MUST", "MUST NOT", =
"REQUIRED", "SHALL", "SHALL NOT", <br>"SHOULD", "SHOULD NOT", =
"RECOMMENDED", "MAY", and "OPTIONAL" in this <br>document are to be =
interpreted as described in RFC-2119.<br><br>A URL for this =
Internet-Draft is:<br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routi=
ng-reqs-02.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-buildi=
ng-routing-reqs-02.txt</a><br><br>Internet-Drafts are also available by =
anonymous FTP at:<br>ftp://ftp.ietf.org/internet-drafts/<br><br>Below is =
the data which will enable a MIME compliant mail =
reader<br>implementation to automatically retrieve the ASCII version of =
the<br>Internet-Draft.<br></div></blockquote></div></div></body></html>=

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<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><blockquote type="cite"><div>_______________________________________________<br>Roll mailing list<br>Roll@ietf.org<br>https://www.ietf.org/mailman/listinfo/roll<br></div></blockquote></div><br></div></body></html>
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On Jan 20, 2009, at 2:47 PM, Thomas Heide Clausen wrote:

> Folks,
>
> As promised, I have reviewed the updated document. As I mentioned, I  
> think that it's improved, and kudos to the authors for their efforts.
>
> There are still a couple of editorial issues that I think should be  
> clarified. My overall "worry" is if the document is "read wrongly"  
> -- i.e. there are certain places where some implicit assumptions  
> need be made explicit in order to avoid potential confusions/ 
> misunderstandings.
>
> So there're a bunch of nits and editorials and a minor move-a-cpl-of- 
> paragraphs suggestion, and a couple of bigger issues, that I think  
> should -- and can easily -- be fixed and would make the document  
> less prone to being misunderstood by the casual reader.
>
> One thing I want to emphasize is, that I worry about having an empty  
> security section -- the different protocols have different  
> characteristics wrt. security, and should one be chosen for  
> extension to ROLL (even if in an incompatible way), I feel that this  
> could be a VERY important point. Could we discuss, on the list, the  
> reasoning behind and the thoughts on this matter? I would consider  
> security to be an important issue, and that evaluating also how the  
> different protocols lends themselves to what ROLL needs would be  
> important.
>
> Anyways, I've dragged the I-D into Pages and annotated it, trying to  
> make suggestions when possible. The PDF is attached to this email (I  
> hope that roll@IETF allows attachments?) I think that the vast  
> majority of my comments should be editorial, and should also be  
> relatively easy to action. But, I think that they'd be important to  
> action as well, especially to avoid misunderstandings to the casual  
> reader.
>
> Cheers,
>
> Thomas
>
> <draft-ietf-roll-protocols-survey-03_review.pdf>

_______________________________________________
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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Tue, 20 Jan 2009 15:26:56 +0100
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Hmm, seems attachments do not get through....

Thomas

On Jan 20, 2009, at 15:17 PM, JP Vasseur wrote:

>
> On Jan 20, 2009, at 2:47 PM, Thomas Heide Clausen wrote:
>
>> Folks,
>>
>> As promised, I have reviewed the updated document. As I mentioned,  
>> I think that it's improved, and kudos to the authors for their  
>> efforts.
>>
>> There are still a couple of editorial issues that I think should  
>> be clarified. My overall "worry" is if the document is "read  
>> wrongly" -- i.e. there are certain places where some implicit  
>> assumptions need be made explicit in order to avoid potential  
>> confusions/misunderstandings.
>>
>> So there're a bunch of nits and editorials and a minor move-a-cpl- 
>> of-paragraphs suggestion, and a couple of bigger issues, that I  
>> think should -- and can easily -- be fixed and would make the  
>> document less prone to being misunderstood by the casual reader.
>>
>> One thing I want to emphasize is, that I worry about having an  
>> empty security section -- the different protocols have different  
>> characteristics wrt. security, and should one be chosen for  
>> extension to ROLL (even if in an incompatible way), I feel that  
>> this could be a VERY important point. Could we discuss, on the  
>> list, the reasoning behind and the thoughts on this matter? I  
>> would consider security to be an important issue, and that  
>> evaluating also how the different protocols lends themselves to  
>> what ROLL needs would be important.
>>
>> Anyways, I've dragged the I-D into Pages and annotated it, trying  
>> to make suggestions when possible. The PDF is attached to this  
>> email (I hope that roll@IETF allows attachments?) I think that the  
>> vast majority of my comments should be editorial, and should also  
>> be relatively easy to action. But, I think that they'd be  
>> important to action as well, especially to avoid misunderstandings  
>> to the casual reader.
>>
>> Cheers,
>>
>> Thomas
>>
>> <draft-ietf-roll-protocols-survey-03_review.pdf>
>

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


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Folks,

As promised, I have reviewed the updated document. As I mentioned, I  
think that it's improved, and kudos to the authors for their efforts.

There are still a couple of editorial issues that I think should be  
clarified. My overall "worry" is if the document is "read wrongly" --  
i.e. there are certain places where some implicit assumptions need be  
made explicit in order to avoid potential confusions/misunderstandings.

So there're a bunch of nits and editorials and a minor move-a-cpl-of- 
paragraphs suggestion, and a couple of bigger issues, that I think  
should -- and can easily -- be fixed and would make the document less  
prone to being misunderstood by the casual reader.

One thing I want to emphasize is, that I worry about having an empty  
security section -- the different protocols have different  
characteristics wrt. security, and should one be chosen for extension  
to ROLL (even if in an incompatible way), I feel that this could be a  
VERY important point. Could we discuss, on the list, the reasoning  
behind and the thoughts on this matter? I would consider security to  
be an important issue, and that evaluating also how the different  
protocols lends themselves to what ROLL needs would be important.

Anyways, I've dragged the I-D into Pages and annotated it, trying to  
make suggestions when possible. The PDF is attached to this email (I  
hope that roll@IETF allows attachments?) I think that the vast  
majority of my comments should be editorial, and should also be  
relatively easy to action. But, I think that they'd be important to  
action as well, especially to avoid misunderstandings to the casual  
reader.

Cheers,

Thomas


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Date: Tue, 20 Jan 2009 07:55:53 -0800
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On Jan 20, 2009, at 6:26 AM, Thomas Heide Clausen wrote:

> Hmm, seems attachments do not get through....
>
> Thomas
>
>

I received the attachment successfully.

Phil
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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Tue, 20 Jan 2009 17:07:26 +0100
To: Philip Levis <pal@cs.stanford.edu>
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Subject: Re: [Roll] Review and comments on
	draft-ietf-roll-protocols-survey-03.txt
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Ok, thanks for the heads up. I'll stop worrying.

Thomas

On Jan 20, 2009, at 16:55 PM, Philip Levis wrote:

>
> On Jan 20, 2009, at 6:26 AM, Thomas Heide Clausen wrote:
>
>> Hmm, seems attachments do not get through....
>>
>> Thomas
>>
>>
>
> I received the attachment successfully.
>
> Phil

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From roll-bounces@ietf.org  Tue Jan 20 11:45:30 2009
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From: Philip Levis <pal@cs.stanford.edu>
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Subject: [Roll] Fwd: Manual Post Requested for draft-ietf-roll-protocols-survey
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Errors-To: roll-bounces@ietf.org Posting notice follows.

I incorporated comments from Stephen Farrell and Thomas Clausen.  
Notably:

1) Tweaked language in abstract. Changed "mature draft" to "working  
item of an IETF WG".

2) Tweaked too strong sentence in 4 from "from analysis and  
examination" to "use" and added "unchanged" qualifier.

3) Reworded NEMO exclusion text.

4) Restructured methodology section, broke into subsections to  
delineate protocol selection from criteria. Had selection define  
positive as well as negative cases. Did not restructure exactly as  
Thomas proposed, but tried to delineate the applicability section.  
Separating protocol applicability into another section while keeping  
criteria under methodology seemed uneven.

5) Incorporated nits from Thomas: spelling, grammar, note on OLSR  
flooding, etc.

6) Made document consistent in use of the term "criterion."  Chose  
criterion over metric because metric is used in a variety of places,  
e.g., for links, and implies a measurement. In contrast, we are  
considering an analysis.

We've been in last call a long time now!!

Phil




Begin forwarded message:

> From: IETF I-D Submission Tool <idsubmission@ietf.org>
> Date: January 20, 2009 11:41:03 AM PST
> To: internet-drafts@ietf.org
> Cc: pal@cs.stanford.edu,arsalan@eecs.berkeley.edu,stevedh@cs.berkeley.edu 
> ,jpv@cisco.com,culler@eecs.berkeley.edu
> Subject: Manual Post Requested for draft-ietf-roll-protocols-survey
>
> Manual Posting Requested for following Internet-Draft:
>
> I-D Submission Tool URL: https://datatracker.ietf.org/idst/status.cgi?submission_id=11948
>
>
> Filename:	   draft-ietf-roll-protocols-survey
> Version:	   04
> Staging URL:	   http://www3.ietf.org/proceedings/staging/draft-ietf-roll-protocols-survey-04.txt
> Title:		   Overview of Existing Routing Protocols for Low Power and  
> Lossy Networks
> Creation_date:	   2009-01-20
> WG ID:		   roll
> Number_of_pages: 25
> Abstract:
> Networks of low power wireless devices introduce novel IP routing
> issues.  Low-power wireless devices, such as sensors, actuators and
> smart objects, have difficult constraints: very limited memory,
> little processing power, and long sleep periods.  As most of these
> devices are battery-powered, energy efficiency is critically
> important.  Wireless link qualities can vary significantly over time,
> requiring protocols to make agile decisions yet minimize topology
> change energy costs.  Routing over such low power and lossy networks
> has novel requirements that existing protocols may not address.  This
> document provides a brief survey of the strengths and weaknesses of
> existing protocols with respect to this class of networks.  From this
> survey it examines whether existing and mature IETF protocols can be
> used without modification in these networks, or whether further work
> is necessary.
>
> Submitter: Philip Levis (pal@cs.stanford.edu)
>
> Author(s):
> Philip Levis, pal@cs.stanford.edu
> Arsalan Tavakoli, arsalan@eecs.berkeley.edu
> Stephen Dawson-Haggerty, stevedh@cs.berkeley.edu
>
>
>

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From: Ian Chakeres <ian.chakeres@gmail.com>
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Subject: [Roll] Comments about draft-ietf-roll-protocol-survey-03
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Errors-To: roll-bounces@ietf.org I examined draft-ietf-roll-protocol-survey-03. I found most of my  
earlier comments addressed, but I believe there are still a few more  
items that need to be changed.

DYMO's distance metric allows representation of link and node cost,  
along with other cost factors. Although "node" and "link" cost are not  
explicitly called out in the DYMO ID, the distance value associated  
with routing information can be modified before consideration for  
inclusion in the routing table as well as prior to sending routing  
information. The roll-protocol-survey document and summary table  
should be updated accordingly.

DYMO-16 does not require, but does by default encourage sending/ 
forwarding of RERR. Please modify Section 12 accordingly. I believe  
this change also effects the loss response rating for DYMO in the  
summary table.

I think all '-low' should be removed from the protocol-survey.

Finally, I did not see any change in Section 4.2, which I believe  
others also agreed was not clear.

Here was my original comment

"""
In Section 4.2, the motivation provided is the possibly large network
size (250-millions) and deep network (20 hops). Network size and
routing information size do not have a direct connection when
hierarchical addressing is used. Perhaps this motivation could be
removed and simply the last sentence kept. Given this change maybe the
suitability metric should become routing table size, instead of table
scalability.
"""

Ian Chakeres


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Subject: Re: [Roll] Fwd: Manual Post Requested for	draft-ietf-roll-protocols-survey
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Errors-To: roll-bounces@ietf.org Philip Levis a =E9crit :
> Posting notice follows.
> =

> I incorporated comments from Stephen Farrell and Thomas Clausen. Notably:
[...]
> 3) Reworded NEMO exclusion text.

How?

Alex


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Subject: Re: [Roll] Fwd: Manual Post Requested for	draft-ietf-roll-protocols-survey
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Errors-To: roll-bounces@ietf.org On Jan 21, 2009, at 2:28 AM, Alexandru Petrescu wrote:

> Philip Levis a =E9crit :
>> Posting notice follows.
>> I incorporated comments from Stephen Farrell and Thomas Clausen.  =

>> Notably:
> [...]
>> 3) Reworded NEMO exclusion text.
>
> How?
>

I'm sorry, this was incorrect. I reworded the DTN exclusion text to  =

include PROPHeT. The NEMO exclusion text remained unchanged.

Phil
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From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [Roll] Fwd: Manual Post Requested for	draft-ietf-roll-protocols-survey
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Errors-To: roll-bounces@ietf.org Philip Levis a =E9crit :
> =

> On Jan 21, 2009, at 2:28 AM, Alexandru Petrescu wrote:
> =

>> Philip Levis a =E9crit :
>>> Posting notice follows. I incorporated comments from Stephen =

>>> Farrell and Thomas Clausen. Notably:
>> [...]
>>> 3) Reworded NEMO exclusion text.
>> =

>> How?
>> =

> =

> I'm sorry, this was incorrect. I reworded the DTN exclusion text to =

> include PROPHeT. The NEMO exclusion text remained unchanged.

If we had ROLL requirements readable in terms similar to some Mobile IP
requirements then we could probably compare them and qualify NEMO for
ROLL, or disqualify.

For example, what are the ROLL requirements with respect to Internet
connectivity?  Is there a {urban,indus,home,building} requirement that
imposes the ROLL network to always be connected to the Internet?

Similary, I think there's no NEMO requirement [RFC4886] explicitely
imposing it to function on battery-operated devices.

In this sense - yes, NEMO exclusion should stay unchanged.

Alex

> =

> Phil


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Subject: Re: [Roll] Fwd: Manual Post Requested	for	draft-ietf-roll-protocols-survey
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Errors-To: roll-bounces@ietf.org There's no industrial requirement to always be connected to the =

internet.  In fact, at this point in time most industrial environments =

intentionally have a physically separate network for their automation =

infrastructure.  This may change, but it will take a long time.

ksjp

Alexandru Petrescu wrote:
> Philip Levis a =E9crit :
>>
>> On Jan 21, 2009, at 2:28 AM, Alexandru Petrescu wrote:
>>
>>> Philip Levis a =E9crit :
>>>> Posting notice follows. I incorporated comments from Stephen =

>>>> Farrell and Thomas Clausen. Notably:
>>> [...]
>>>> 3) Reworded NEMO exclusion text.
>>>
>>> How?
>>>
>>
>> I'm sorry, this was incorrect. I reworded the DTN exclusion text to =

>> include PROPHeT. The NEMO exclusion text remained unchanged.
>
> If we had ROLL requirements readable in terms similar to some Mobile IP
> requirements then we could probably compare them and qualify NEMO for
> ROLL, or disqualify.
>
> For example, what are the ROLL requirements with respect to Internet
> connectivity?  Is there a {urban,indus,home,building} requirement that
> imposes the ROLL network to always be connected to the Internet?
>
> Similary, I think there's no NEMO requirement [RFC4886] explicitely
> imposing it to function on battery-operated devices.
>
> In this sense - yes, NEMO exclusion should stay unchanged.
>
> Alex
>
>>
>> Phil
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
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On Jan 20, 2009, at 2:40 PM, Ian Chakeres wrote:

> I examined draft-ietf-roll-protocol-survey-03. I found most of my  
> earlier comments addressed, but I believe there are still a few more  
> items that need to be changed.
>
> DYMO's distance metric allows representation of link and node cost,  
> along with other cost factors. Although "node" and "link" cost are  
> not explicitly called out in the DYMO ID, the distance value  
> associated with routing information can be modified before  
> consideration for inclusion in the routing table as well as prior to  
> sending routing information. The roll-protocol-survey document and  
> summary table should be updated accordingly.
>
> DYMO-16 does not require, but does by default encourage sending/ 
> forwarding of RERR. Please modify Section 12 accordingly. I believe  
> this change also effects the loss response rating for DYMO in the  
> summary table.
>

I'm glad that the draft is having impact on protocol specifications,  
so that they consider the demands of LLNs. But we need to close on  
this document. Clearly it can't chase moving targets in drafts.  
Originally, the intention of the  "mature drafts" language had been to  
be able to include some important protocols which were not yet RFCs  
but were at a level of stability that meant they wouldn't be a moving  
target.

Phil
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Subject: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-04.txt
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Errors-To: roll-bounces@ietf.org --NextPart

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

	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-04.txt
	Pages		: 25
	Date		: 2009-1-21
	
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  From this
   survey it examines whether existing and mature IETF protocols can be
   used without modification in these networks, or whether further work
   is necessary.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-04.txt

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Subject: Re: [Roll] Comments about draft-ietf-roll-protocol-survey-03
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Errors-To: roll-bounces@ietf.org On Jan 21, 2009, at 9:23 PM, Philip Levis wrote:

> comments inline
>
> On Jan 20, 2009, at 2:40 PM, Ian Chakeres wrote:
>
>> I examined draft-ietf-roll-protocol-survey-03. I found most of my  
>> earlier comments addressed, but I believe there are still a few  
>> more items that need to be changed.
>>
>> DYMO's distance metric allows representation of link and node cost,  
>> along with other cost factors. Although "node" and "link" cost are  
>> not explicitly called out in the DYMO ID, the distance value  
>> associated with routing information can be modified before  
>> consideration for inclusion in the routing table as well as prior  
>> to sending routing information. The roll-protocol-survey document  
>> and summary table should be updated accordingly.
>>
>> DYMO-16 does not require, but does by default encourage sending/ 
>> forwarding of RERR. Please modify Section 12 accordingly. I believe  
>> this change also effects the loss response rating for DYMO in the  
>> summary table.
>>
>
> I'm glad that the draft is having impact on protocol specifications,  
> so that they consider the demands of LLNs. But we need to close on  
> this document. Clearly it can't chase moving targets in drafts.  
> Originally, the intention of the  "mature drafts" language had been  
> to be able to include some important protocols which were not yet  
> RFCs but were at a level of stability that meant they wouldn't be a  
> moving target.

Which of course does not mean that these protocols will not be good  
candidates (with potential extensions) for LLN once/if ROLL gets re- 
chartered.

JP.

>
>
> Phil
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
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Subject: [Roll] I-D Action:draft-ietf-roll-indus-routing-reqs-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.


	Title           : Industrial Routing Requirements in Low Power and Lossy Networks
	Author(s)       : D. Networks, et al.
	Filename        : draft-ietf-roll-indus-routing-reqs-04.txt
	Pages           : 24
	Date            : 2009-01-22

Wireless, low power field devices enable industrial users to
significantly increase the amount of information collected and the
number of control points that can be remotely managed.  The
deployment of these wireless devices will significantly improve the
productivity and safety of the plants while increasing the efficiency
of the plant workers by extending the information set available from
wired systems.  In an industrial environment, low power, high
reliability, and easy installation and maintenance are mandatory
qualities for wireless devices.  The aim of this document is to
analyze the requirements for the routing protocol used for Low power
and Lossy Networks (LLN) in industrial environments.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-reqs-04.txt

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Hi,

thanks for submitting the new version of the ID.
Here my comments:

- Generally, I would prefer to separate the evaluation metrics and the
survey of protocols according to these metrics in two different
documents. It could be dangerous to mix these two aspects within the
same document as the choice of metrics may be influenced by the choice
of the protocols to be considered. Also, it would ease the addition of a
routing protocol later on without changing the evaluation criteria.

- Another general remark: I am not sure that this would belong into this
ID, but somewhere I would like to see an applicability statement that
underlines the differences to MANET and 6lowpan requirements and
protocols. For a reader that -- like me -- comes more from the MANET
world, it would be good to emphasize why the protocols that work well in
MANETs do not work in LLNs. MANETs are not per se limited to high power
machines and stable links but may have the same constraints as LLNs.

- Section 3.1 (Protocols Considered): This is a good new section.
However, I would add one or two explaining sentences (or references) to
the statement "This document does not consider DTN bundles [RFC5050] or
the DTN [...], because they are not routing protocols." As Thomas said,
there is no such single unique definition of what a routing protocol is.
You could either reference some document(s) with such a definition, or
explain what exact criteria does a routing protocol have and why DTN
does not meet these requirements. In particular for hierarchical NEMO,
you could argue that it *is* a routing protocol, if you consider a
definition of a routing protocol being "something that modifies the
routing table".

- Again Section 3.1: I would change the following sentence: "This
document does not seek to answer the question of whether there is any
protocol anywhere which could meet LLN application requirements.", to
"This document does not seek to answer the question of whether there is
any protocol anywhere *outside the IETF* which could meet LLN
application requirements.", i.e. add "outside the IETF"

- Section 3.2 (Criteria): Change: these criteria are "necessary but not
sufficient." to: these criteria are "necessary but not sufficient".
(move the full stop towards the end of the sentence)

- Section 4 (Suitability Summary): Personally, I would rename the
section title from "Suitability Summary" to "Evaluation Criteria" (maybe
section 3.2 Criteria should be renamed to Criteria Selection or
something similar). You reference this section from section 3.2
(Criteria) "The five criteria, presented in Section 4 [...]".
Accordingly, I would prefer to have five subsections with each criterion
as one single subsection, i.e. split up "Link and Node Cost" into two
subsections. At first, I only counted four criteria before I saw that
you combined two within one subsection.

- Section 4.2 (Table Scalability): As Thomas said, it's not only the
routing table size that should be bounded, but the complete state of a
routing protocol. For example in OLSRv2, there are many different sets
(Neighbor Set, Topology Set, Advertised Neighbors Set, ...) that are all
part of the state of a router. Otherwise, a routing protocol could
"hide" a large part of the state outside the routing table and still
fulfill the criterion of a scaled routing table.

- Section 4.4 (Control cost): I know, this has been addressed in my
prior email, but I still feel uncomfortable with this section, as it
only considers control cost and not the total cost for acquiring the
routes *and* for transmitting  data. Even if you say that generally in
LLNs the data rate is very low, still I think it would be a fairer
criterion to consider the total cost (data + control traffic). As said
by Thomas and by me, you could easily design a routing protocol with
zero-cost control cost (don't send any control traffic) but a very high
data cost (flood the whole network).

- Again Section 4.4: In my opinion, the following paragraph is
unnecessary here because it applies for all criteria, not only for
control cost:

   The control cost criterion is a necessary but not sufficient
   condition for a protocol to be a viable routing protocol for LLNs.
   Protocols not meeting this bound are unacceptable for use in this
   environment; however, there may be protocols which receive a "pass"
   for this criterion and yet are also unsuitable.


- Appendix B: In section 4.1 you mentioned that you use the formal big-O
notation. However, in the appendix you use O(R + e) and O(e) with e
being a constant. The constant should be removed from within the O().

- As said by others, a Security Considerations section would be a very
good thing to include.

Best regards,
Ulrich


Internet-Drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.
>
> 	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-04.txt
> 	Pages		: 25
> 	Date		: 2009-1-21
> 	
> Networks of low power wireless devices introduce novel IP routing
>    issues.  Low-power wireless devices, such as sensors, actuators and
>    smart objects, have difficult constraints: very limited memory,
>    little processing power, and long sleep periods.  As most of these
>    devices are battery-powered, energy efficiency is critically
>    important.  Wireless link qualities can vary significantly over time,
>    requiring protocols to make agile decisions yet minimize topology
>    change energy costs.  Routing over such low power and lossy networks
>    has novel requirements that existing protocols may not address.  This
>    document provides a brief survey of the strengths and weaknesses of
>    existing protocols with respect to this class of networks.  From this
>    survey it examines whether existing and mature IETF protocols can be
>    used without modification in these networks, or whether further work
>    is necessary.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-04.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft.
>   
> ------------------------------------------------------------------------
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>   


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Hi,<br>
<br>
thanks for submitting the new version of the ID.<br>
Here my comments:<br>
<br>
- Generally, I would prefer to separate the evaluation metrics and the
survey of protocols according to these metrics in two different
documents. It could be dangerous to mix these two aspects within the
same document as the choice of metrics may be influenced by the choice
of the protocols to be considered. Also, it would ease the addition of
a routing protocol later on without changing the evaluation criteria. <br>
<br>
- Another general remark: I am not sure that this would belong into
this ID, but somewhere I would like to see an applicability statement
that underlines the differences to MANET and 6lowpan requirements and
protocols. For a reader that -- like me -- comes more from the MANET
world, it would be good to emphasize why the protocols that work well
in MANETs do not work in LLNs. MANETs are not per se limited to high
power machines and stable links but may have the same constraints as
LLNs. <br>
<br>
- Section 3.1 (Protocols Considered): This is a good new section.
However, I would add one or two explaining sentences (or references) to
the statement "This document does not consider DTN bundles [RFC5050] or
the DTN [...], because they are not routing protocols." As Thomas said,
there is no such single unique definition of what a routing protocol
is. You could either reference some document(s) with such a definition,
or explain what exact criteria does a routing protocol have and why DTN
does not meet these requirements. In particular for hierarchical NEMO,
you could argue that it *is* a routing protocol, if you consider a
definition of a routing protocol being "something that modifies the
routing table". <br>
<br>
- Again Section 3.1: I would change the following sentence: "This
document does not seek to answer the question of whether there is any
protocol anywhere which could meet LLN application requirements.", to
"This document does not seek to answer the question of whether there is
any protocol anywhere *outside the IETF* which could meet LLN
application requirements.", i.e. add "outside the IETF"<br>
<br>
- Section 3.2 (Criteria): Change: <tt>these criteria are "necessary
but not sufficient."</tt> to: <tt>these criteria are "necessary but
not sufficient".</tt><br>
(move the full stop towards the end of the sentence)<br>
<br>
- Section 4 (Suitability Summary): Personally, I would rename the
section title from "Suitability Summary" to "Evaluation Criteria"
(maybe section 3.2 Criteria should be renamed to Criteria Selection or
something similar). You reference this section from section 3.2
(Criteria) "The five criteria, presented in Section 4 [...]".
Accordingly, I would prefer to have five subsections with each
criterion as one single subsection, i.e. split up "Link and Node Cost"
into two subsections. At first, I only counted four criteria before I
saw that you combined two within one subsection.<br>
<br>
- Section 4.2 (Table Scalability): As Thomas said, it's not only the
routing table size that should be bounded, but the complete state of a
routing protocol. For example in OLSRv2, there are many different sets
(Neighbor Set, Topology Set, Advertised Neighbors Set, ...) that are
all part of the state of a router. Otherwise, a routing protocol could
"hide" a large part of the state outside the routing table and still
fulfill the criterion of a scaled routing table. <br>
<br>
- Section 4.4 (Control cost): I know, this has been addressed in my
prior email, but I still feel uncomfortable with this section, as it
only considers control cost and not the total cost for acquiring the
routes *and* for transmitting&nbsp; data. Even if you say that generally in
LLNs the data rate is very low, still I think it would be a fairer
criterion to consider the total cost (data + control traffic). As said
by Thomas and by me, you could easily design a routing protocol with
zero-cost control cost (don't send any control traffic) but a very high
data cost (flood the whole network). <br>
<br>
- Again Section 4.4: In my opinion, the following paragraph is
unnecessary here because it applies for all criteria, not only for
control cost:<br>
<pre>   The control cost criterion is a necessary but not sufficient
   condition for a protocol to be a viable routing protocol for LLNs.
   Protocols not meeting this bound are unacceptable for use in this
   environment; however, there may be protocols which receive a "pass"
   for this criterion and yet are also unsuitable.

</pre>
- Appendix B: In section 4.1 you mentioned that you use the formal
big-O notation. However, in the appendix you use <tt>O(R + e)</tt> and
<tt>O(e)</tt> with <tt>e</tt> being a constant. The constant should be
removed from within the O(). <br>
<br>
- As said by others, a Security Considerations section would be a very
good thing to include.<br>
<br>
Best regards,<br>
Ulrich<br>
<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a> wrote:
<blockquote cite="mid:20090121231501.7755A3A68E4@core3.amsl.com"
 type="cite">
  <pre wrap="">A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.

	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-04.txt
	Pages		: 25
	Date		: 2009-1-21
	
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  From this
   survey it examines whether existing and mature IETF protocols can be
   used without modification in these networks, or whether further work
   is necessary.

A URL for this Internet-Draft is:
<a class="moz-txt-link-freetext" href="http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-04.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-04.txt</a>

Internet-Drafts are also available by anonymous FTP at:
<a class="moz-txt-link-freetext" href="ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-drafts/</a>

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implementation to automatically retrieve the ASCII version of the
Internet-Draft.
  </pre>
  <pre wrap="">
<hr size="4" width="90%">
_______________________________________________
Roll mailing list
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</blockquote>
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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Fri, 23 Jan 2009 10:43:34 +0100
To: Philip Levis <pal@cs.stanford.edu>
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Errors-To: roll-bounces@ietf.org On Jan 20, 2009, at 20:45 PM, Philip Levis wrote:

> Posting notice follows.
>
> I incorporated comments from Stephen Farrell and Thomas Clausen.  
> Notably:
>
> 1) Tweaked language in abstract. Changed "mature draft" to "working  
> item of an IETF WG".
>

Good.

> 2) Tweaked too strong sentence in 4 from "from analysis and  
> examination" to "use" and added "unchanged" qualifier.
>

Good.

> 3) Reworded NEMO exclusion text.
>
> 4) Restructured methodology section, broke into subsections to  
> delineate protocol selection from criteria. Had selection define  
> positive as well as negative cases. Did not restructure exactly as  
> Thomas proposed, but tried to delineate the applicability section.  
> Separating protocol applicability into another section while  
> keeping criteria under methodology seemed uneven.

Good, my proposal was just one way -- others work as well.

>
> 5) Incorporated nits from Thomas: spelling, grammar, note on OLSR  
> flooding, etc.
>

Thanks.

> 6) Made document consistent in use of the term "criterion."  Chose  
> criterion over metric because metric is used in a variety of  
> places, e.g., for links, and implies a measurement. In contrast, we  
> are considering an analysis.

Ok, almost but not quite: there's still a lingering "requirement"  
somewhere, I think I've indicated in my latest review as well.

I still think that criterion sends the wrong message -- I understand  
that "metric" is overloaded. Can we think up another term to satisfy  
all?

> We've been in last call a long time now!!

I'm not trying purposely to be a pain, but consider this document  
important to get right, and so I try to contribute what I can. I  
should say, thought, that the authors have been quite good at quick  
turn-arounds, and deserve credit and thanks for that.

Thomas

>
> Phil
>
>
>
>
> Begin forwarded message:
>
>> From: IETF I-D Submission Tool <idsubmission@ietf.org>
>> Date: January 20, 2009 11:41:03 AM PST
>> To: internet-drafts@ietf.org
>> Cc:  
>> pal@cs.stanford.edu,arsalan@eecs.berkeley.edu,stevedh@cs.berkeley.edu 
>> ,jpv@cisco.com,culler@eecs.berkeley.edu
>> Subject: Manual Post Requested for draft-ietf-roll-protocols-survey
>>
>> Manual Posting Requested for following Internet-Draft:
>>
>> I-D Submission Tool URL: https://datatracker.ietf.org/idst/ 
>> status.cgi?submission_id=11948
>>
>>
>> Filename:	   draft-ietf-roll-protocols-survey
>> Version:	   04
>> Staging URL:	   http://www3.ietf.org/proceedings/staging/draft- 
>> ietf-roll-protocols-survey-04.txt
>> Title:		   Overview of Existing Routing Protocols for Low Power  
>> and Lossy Networks
>> Creation_date:	   2009-01-20
>> WG ID:		   roll
>> Number_of_pages: 25
>> Abstract:
>> Networks of low power wireless devices introduce novel IP routing
>> issues.  Low-power wireless devices, such as sensors, actuators and
>> smart objects, have difficult constraints: very limited memory,
>> little processing power, and long sleep periods.  As most of these
>> devices are battery-powered, energy efficiency is critically
>> important.  Wireless link qualities can vary significantly over time,
>> requiring protocols to make agile decisions yet minimize topology
>> change energy costs.  Routing over such low power and lossy networks
>> has novel requirements that existing protocols may not address.  This
>> document provides a brief survey of the strengths and weaknesses of
>> existing protocols with respect to this class of networks.  From this
>> survey it examines whether existing and mature IETF protocols can be
>> used without modification in these networks, or whether further work
>> is necessary.
>>
>> Submitter: Philip Levis (pal@cs.stanford.edu)
>>
>> Author(s):
>> Philip Levis, pal@cs.stanford.edu
>> Arsalan Tavakoli, arsalan@eecs.berkeley.edu
>> Stephen Dawson-Haggerty, stevedh@cs.berkeley.edu
>>
>>
>>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

_______________________________________________
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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Fri, 23 Jan 2009 10:46:28 +0100
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Errors-To: roll-bounces@ietf.org On Jan 21, 2009, at 17:22 PM, Alexandru Petrescu wrote:

> Philip Levis a =E9crit :
>> On Jan 21, 2009, at 2:28 AM, Alexandru Petrescu wrote:
>>> Philip Levis a =E9crit :
>>>> Posting notice follows. I incorporated comments from Stephen  =

>>>> Farrell and Thomas Clausen. Notably:
>>> [...]
>>>> 3) Reworded NEMO exclusion text.
>>> How?
>> I'm sorry, this was incorrect. I reworded the DTN exclusion text  =

>> to include PROPHeT. The NEMO exclusion text remained unchanged.
>
> If we had ROLL requirements readable in terms similar to some  =

> Mobile IP
> requirements then we could probably compare them and qualify NEMO for
> ROLL, or disqualify.
>

It actually calls out a good point: the survey I-D references a LOT  =

of requirements docs, which are not (yet) published as RFC. Any  =

thoughts as to if continued work on those requirements documents will  =

in any way alter the conclusions of this I-D?

I may not have been keeping up, but where are the requirements  =

documents, progress-wise, with respect to the survey I-D?

Thomas

> For example, what are the ROLL requirements with respect to Internet
> connectivity?  Is there a {urban,indus,home,building} requirement that
> imposes the ROLL network to always be connected to the Internet?
>
> Similary, I think there's no NEMO requirement [RFC4886] explicitely
> imposing it to function on battery-operated devices.
>
> In this sense - yes, NEMO exclusion should stay unchanged.
>
> Alex
>
>> Phil
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

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Ulrich,

On Jan 22, 2009, at 11:26 AM, Ulrich Herberg wrote:

> Hi,
>
> thanks for submitting the new version of the ID.
> Here my comments:
>
> - Generally, I would prefer to separate the evaluation metrics and  
> the survey of protocols according to these metrics in two different  
> documents. It could be dangerous to mix these two aspects within  
> the same document as the choice of metrics may be influenced by the  
> choice of the protocols to be considered. Also, it would ease the  
> addition of a routing protocol later on without changing the  
> evaluation criteria.

Yes, I agree. As it would be, or as it appears to me, there are four  
domain-specific "routing requirements" I-Ds being produced, which  
enumerate the evaluation metrics (and more) in details. I would hope  
that the WG would come up with one-protocol-fits-all-four domains --  
and as such that the requirements from these four domains could be  
condensed into one requirements document.

> - Another general remark: I am not sure that this would belong into  
> this ID, but somewhere I would like to see an applicability  
> statement that underlines the differences to MANET and 6lowpan  
> requirements and protocols. For a reader that -- like me -- comes  
> more from the MANET world, it would be good to emphasize why the  
> protocols that work well in MANETs do not work in LLNs. MANETs are  
> not per se limited to high power machines and stable links but may  
> have the same constraints as LLNs.

I share this worry with you, the relationship with related wg's is  
not clear. 6low has a charter that enumerates properties remarkably  
similar to those of roll, and 6low also has routing on the radar --  
so it'd be good somewhere to have this relationship spelled out.

<SNIP>

> - Section 4.4 (Control cost): I know, this has been addressed in my  
> prior email, but I still feel uncomfortable with this section, as  
> it only considers control cost and not the total cost for acquiring  
> the routes *and* for transmitting  data. Even if you say that  
> generally in LLNs the data rate is very low, still I think it would  
> be a fairer criterion to consider the total cost (data + control  
> traffic). As said by Thomas and by me, you could easily design a  
> routing protocol with zero-cost control cost (don't send any  
> control traffic) but a very high data cost (flood the whole network).

I subscribe to the above. The the cost we're interested in is not the  
control cost but the "total cost of operating the network" -- which  
includes the cost of getting data packets through. This is not really  
reflected in this I-D. I know that academic literature contains  
evaluations of this sort that might help?
> - Appendix B: In section 4.1 you mentioned that you use the formal  
> big-O notation. However, in the appendix you use O(R + e) and O(e)  
> with e being a constant. The constant should be removed from within  
> the O().

I think that Chris Dearlove brought this up also.


Thomas

> - As said by others, a Security Considerations section would be a  
> very good thing to include.
>
> Best regards,
> Ulrich
>
>
> Internet-Drafts@ietf.org wrote:
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy  
>> networks Working Group of the IETF.
>>
>> 	Title		: Overview of Existing Routing Protocols for Low Power and  
>> Lossy Networks
>> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
>> 	Filename	: draft-ietf-roll-protocols-survey-04.txt
>> 	Pages		: 25
>> 	Date		: 2009-1-21
>> 	
>> Networks of low power wireless devices introduce novel IP routing
>>    issues.  Low-power wireless devices, such as sensors, actuators  
>> and
>>    smart objects, have difficult constraints: very limited memory,
>>    little processing power, and long sleep periods.  As most of these
>>    devices are battery-powered, energy efficiency is critically
>>    important.  Wireless link qualities can vary significantly over  
>> time,
>>    requiring protocols to make agile decisions yet minimize topology
>>    change energy costs.  Routing over such low power and lossy  
>> networks
>>    has novel requirements that existing protocols may not  
>> address.  This
>>    document provides a brief survey of the strengths and  
>> weaknesses of
>>    existing protocols with respect to this class of networks.   
>> From this
>>    survey it examines whether existing and mature IETF protocols  
>> can be
>>    used without modification in these networks, or whether further  
>> work
>>    is necessary.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols- 
>> survey-04.txt
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> Below is the data which will enable a MIME compliant mail reader
>> implementation to automatically retrieve the ASCII version of the
>> Internet-Draft.
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
Ulrich,<div><br><div><div>On Jan 22, 2009, at 11:26 AM, Ulrich Herberg =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"> Hi,<br> <br> thanks for submitting the new version of the =
ID.<br> Here my comments:<br> <br> - Generally, I would prefer to =
separate the evaluation metrics and the survey of protocols according to =
these metrics in two different documents. It could be dangerous to mix =
these two aspects within the same document as the choice of metrics may =
be influenced by the choice of the protocols to be considered. Also, it =
would ease the addition of a routing protocol later on without changing =
the evaluation criteria. <br></blockquote><div><br></div><div>Yes, I =
agree. As it would be, or as it appears to me, there are four =
domain-specific "routing requirements" I-Ds being produced, which =
enumerate the evaluation metrics (and more) in details. I would hope =
that the WG would come up with one-protocol-fits-all-four domains -- and =
as such that the requirements from these four domains could be condensed =
into one requirements document.</div><br><blockquote type=3D"cite"> - =
Another general remark: I am not sure that this would belong into this =
ID, but somewhere I would like to see an applicability statement that =
underlines the differences to MANET and 6lowpan requirements and =
protocols. For a reader that -- like me -- comes more from the MANET =
world, it would be good to emphasize why the protocols that work well in =
MANETs do not work in LLNs. MANETs are not per se limited to high power =
machines and stable links but may have the same constraints as =
LLNs.</blockquote><div><br></div><div>I share this worry with you, the =
relationship with related wg's is not clear. 6low has a charter that =
enumerates properties remarkably similar to those of roll, and 6low also =
has routing on the radar -- so it'd be good somewhere to have this =
relationship spelled =
out.</div><div><br></div><div>&lt;SNIP></div><div><br></div><blockquote =
type=3D"cite">- Section 4.4 (Control cost): I know, this has been =
addressed in my prior email, but I still feel uncomfortable with this =
section, as it only considers control cost and not the total cost for =
acquiring the routes *and* for transmitting=A0 data. Even if you say =
that generally in LLNs the data rate is very low, still I think it would =
be a fairer criterion to consider the total cost (data + control =
traffic). As said by Thomas and by me, you could easily design a routing =
protocol with zero-cost control cost (don't send any control traffic) =
but a very high data cost (flood the whole network). =
</blockquote><div><br></div>I subscribe to the above. The the cost we're =
interested in is not the control cost but the "total cost of operating =
the network" -- which includes the cost of getting data packets through. =
This is not really reflected in this I-D. I know that academic =
literature contains evaluations of this sort that might =
help?</div><div><blockquote type=3D"cite"><pre><span =
class=3D"Apple-style-span" style=3D"white-space: normal; =
-webkit-text-stroke-width: -1; ">- Appendix B: In section 4.1 you =
mentioned that you use the formal big-O notation. However, in the =
appendix you use <tt>O(R + e)</tt> and <tt>O(e)</tt> with <tt>e</tt> =
being a constant. The constant should be removed from within the =
O().=A0</span></pre></blockquote><div><br></div>I think that Chris =
Dearlove brought this up =
also.</div><div><br></div><div><br></div><div>Thomas</div><div><br><blockq=
uote type=3D"cite"> - As said by others, a Security Considerations =
section would be a very good thing to include.<br> <br> Best =
regards,<br> Ulrich<br> <br> <br> <a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a> =
wrote: <blockquote cite=3D"mid:20090121231501.7755A3A68E4@core3.amsl.com" =
type=3D"cite">  <pre wrap=3D"">A New Internet-Draft is available from =
the on-line Internet-Drafts=20
directories.
This draft is a work item of the Routing Over Low power and Lossy =
networks Working Group of the IETF.

	Title		: Overview of Existing Routing Protocols for Low =
Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-04.txt
	Pages		: 25
	Date		: 2009-1-21
=09
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  =46rom =
this
   survey it examines whether existing and mature IETF protocols can be
   used without modification in these networks, or whether further work
   is necessary.

A URL for this Internet-Draft is:
<a class=3D"moz-txt-link-freetext" =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-surv=
ey-04.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-s=
urvey-04.txt</a>

Internet-Drafts are also available by anonymous FTP at:
<a class=3D"moz-txt-link-freetext" =
href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-d=
rafts/</a>

Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
  </pre>  <pre wrap=3D""><hr size=3D"4" =
width=3D"90%">_______________________________________________
Roll mailing list
<a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a>
<a class=3D"moz-txt-link-freetext" =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
ailman/listinfo/roll</a>
  </pre> </blockquote> <br><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; =
">_______________________________________________</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Roll mailing list</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><a =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
ailman/listinfo/roll</a></div> =
</blockquote></div><br></div></body></html>=

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(I'm resending this, sans the attachment, as the attachment makes the  
email wait for moderation and the WG chairs may likely be busy. As we  
all want to see quick progress, I thought I'd send my "high-level  
comments" through, so that we can start picking at those).

Dear Authors, All,

Since I'm taking stabs at 6lowpan here as well, I've included the  
6lowpan AD as Cc to this email.

Thanks for producing an updated I-D so quickly. JP asked for a quick  
turn-around on the review as well, and so I have reviewed the  
document, and attached a pdf as I did last time, to include my  
detailed/nittty-gritty comments as well.

I think that the document has improved some, however I still have  
some high-level comments, in addition to the nitty-gritty ones  
included in the pdf and those that I raised in my -03 review which  
are not yet addressed. I raise the high-level ones here, as those are  
what I think we need to resolve before sending the document onwards.

	o	I note that a number of my review comments from -03 have not been  
addressed, and so
		I consider those to still be applicable and encourage that my -03  
review be reconsidered.
		In particular, some of the comments which I would consider "easy  
fixes" have not been
		incorporated. I wonder if it would be possible to expand on why not?

		That said, there are a number of also important comments  
(terminology-confusion,
		omissions etc.) that I pointed out in my -03 review, which have not  
been addressed
		(either through inclusion of text or through debunking on the 'list)

	o	It's still not clear how ROLL distinguishes itself from, say,  
MANET or 6low. Many of the
		characteristics listed for ROLL deployments are isomorphic to those  
listed for MANET
		and 6low, and even having read through the document(s) multiple  
times, I'm still left
		having to guess.

		As the charter is relatively vague on this matter (it's not really  
a criticism of the charter,
		it is as I think is reasonable for a wg with goal of "figuring our  
what to do next"),
		I think it is a paramount requirement that this document -- which  
aims at evaluating
		existing protocols for their applicability -- is extremely specific  
on this matter.

		So, my BIGGEST issue remains: the document concludes that "no  
existing protocols
		are applicable as-is" -- but does not spell out, or even hint at,  
"applicable for what?"

		Would it be possible to add a section somewhere clearly stating this?

		Let me cite from the 6low charter:


			  "Well-established fields such as control networks, and  
burgeoning ones
	such as "sensor" (or transducer) networks, are increasingly being
	based on wireless technologies. Most (but certainly not all) of these
	nodes are amongst the most constrained that have ever been networked
	wirelessly. Extreme low power (such that they will run potentially for
	years on batteries) and extreme low cost (total device cost in single
	digit dollars, and riding Moore's law to continuously reduce that
	price point) are seen as essential enablers towards their deployment
	in networks with the following characteristics...."

		The 6lowpan charter even cites a milestone thus "Sep 2008: Submit  
Routing
		Requirements document to IESG for consideration as an Informational  
RFC"

		Reading this indicates an overlap, and one could ask "Is ROLL the  
routing component
		of 6low?". If yes, then this should probably be stated explicitly.  
If NO, then this probably
		also should be stated explicitly -- and a justification given as well.

		The same kind of argument can be made, let me cite from the MANET  
charter:

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

		It does not explicitly enumerate the characteristics of "wireless  
routing", but again the relationship
		with ROLL isn't clear.

		I think that this is the biggest piece missing from this document  
-- and I think that it's
		a piece of paramount importance as well, so I really really think  
that we need to
		write up something to clarify this.


	o	I still see "Criteria" used, and I think that it's not the right  
term. "Evaluation metrics" seems
		a much more appropriate term. I've argued why in my previous  
review, and so I'll defer to
		that for details as to why -- but I REALLY do encourage changing  
the term.

		I can say the magic word ("please"), if it helps any ;)

	o	There still are a few inconsistencies as to if not attaining a  
"pass" on all the evaluation
		metrics means that the protocol:

			o	cannot be used
			o	is not a candidate at all
			o	cannot be used as-is, but may be modified to work

		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) send slightly  
different messages as to
		this.

		This ties in with another problem, that I just notice right now.  
Section 1 ends with:

			"Whether or not such a protocol involves modifications to an existing
			   protocol or a new protocol entirely is outside the scope of this
			   document: this document simply seeks to answer the question: do  
LLNs
			   require a new protocol specification document at all?"

		Which I can agree with, as such. However 3.2 reads:

			"A protocol that does not meet the criteria cannot be used as
			   specified, but it is possible that a protocol meets the  
criteria yet
			   is not able to meet the requirements of a particular application
			   domain.  Nevertheless, a protocol that meets all of the criteria
			   would be very promising, and deserve a closer look and  
consideration
			   in light of LLN application domains."

		And 4.0:
		
			"If a protocol  cannot meet even these minimalist criteria, then  
it cannot be used
			   unchanged in several major ROLL application domains and so is
			   unlikely to be a good candidate for use."


		The offending bits here are the last sentence in the quote from  
3.2, and the
		"is unlikely to be a good candidate for use" from 4.

		Now, 1 states that the goal simply is to identify "can an existing  
protocol
		specification be used?".

		3.2 and 4.0 state, essentially, that the document go both beyond  
and below that,
		by admitting that "no, we cannot answer that, the evaluation  
metrics presented
		do not allow answering this question completely" -- and "oh, the  
document also
		tries to identify protocols that could be further developed/ 
investigated".

		In other words, the document sets out to do one thing, then doesn't  
quite do that,
		but does something else. While I am sure that that's not the  
intent, it could be
		read as if the document essentially had as objective to "dismiss  
all related IETF work"
		-- and I'd really rather that we not be accused of that ;)

	o	Security
		
		It still troubles me a great deal that the "Security  
Considerations" section is
		intentionally left blank. It strikes me that the different  
protocols discussed have
		different properties with respect to how they can be secured -- and  
that this
		discussion belongs in this document. If not, then I think the  
rationale as to why
		this document does not consider security MUST be included in the  
security
		considerations section.

		Or, if security simply is not at all important in ROLL networks,  
then stating that
		as reason for not discussing security would likely be enough?

	o	I've made some additional comments to the evaluation of OLSR as  
well, I encourage
		that these be considered.

I think that these high-level points are important to get  
straightened out before moving this document forward. I see that  
others have raised issues as well, I'll reply to those with my comments.

Cheers,

Thomas



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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
 <div>(I'm resending this, sans the attachment, as the attachment makes =
the email wait for moderation and the WG chairs may likely be busy. As =
we all want to see quick progress, I thought I'd send my "high-level =
comments" through, so that we can start picking at =
those).</div><div><br></div>Dear Authors, All,<div><br></div><div>Since =
I'm taking stabs at 6lowpan here as well, I've included the 6lowpan AD =
as Cc to this email.</div><div><br></div><div>Thanks for producing an =
updated I-D so quickly. JP asked for a quick turn-around on the review =
as well, and so I have reviewed the document, and attached a pdf as I =
did last time, to include my detailed/nittty-gritty comments as =
well.=A0</div><div><br></div><div>I think that the document has improved =
some, however I still have some high-level comments, in addition to the =
nitty-gritty ones included in the pdf and those that I raised in my -03 =
review which are not yet addressed. I raise the high-level ones here, as =
those are what I think we need to resolve before sending the document =
onwards.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I note that a number of my review =
comments from -03 have not been addressed, and so<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
consider those to still be applicable and encourage that my -03 review =
be reconsidered.<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>In particular, some of =
the comments which I would consider "easy fixes" have not =
been<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>incorporated. I wonder if =
it would be possible to expand on why =
not?<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>That said, there are a =
number of also important comments =
(terminology-confusion,=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>omissions etc.) that I =
pointed out in my -03 review, which have not been =
addressed=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>(either through inclusion =
of text or through debunking on the =
'list)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>It's still not clear how ROLL =
distinguishes itself from, say, MANET or 6low. Many of =
the=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>characteristics listed for ROLL deployments are =
isomorphic to those listed for MANET=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>and 6low, and even having read through the document(s) multiple =
times, I'm still left<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>having =
to=A0guess.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>As the charter is =
relatively vague on this matter (it's not really a criticism of the =
charter,</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>it is as I think is =
reasonable for a wg with goal of "figuring our what to do =
next"),</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think it is a paramount =
requirement that this document -- which aims at =
evaluating<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>existing protocols for =
their applicability -- is extremely specific on this =
matter.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>So, my BIGGEST issue =
remains: the document concludes that "no existing =
protocols<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>are applicable as-is" -- =
but does not spell out, or even hint at, "applicable for =
what?"<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Would it be possible to =
add a section somewhere clearly stating =
this?</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Let me cite from=A0the =
6low charter:</div><div><br></div><div><br></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><font =
class=3D"Apple-style-span" face=3D"Courier"><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"3"><span class=3D"Apple-style-span" =
style=3D"font-size: 12px;">	<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>  =
"</span></font></span>Well-established fields such as control networks, =
and burgeoning ones</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>such as "sensor" (or transducer) networks, are =
increasingly being<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">based on wireless technologies. Most (but certainly not =
all) of these<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">nodes are amongst the most constrained that have ever =
been networked<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">wirelessly. Extreme low power (such that they will run =
potentially for<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">years on batteries) and extreme low cost (total device =
cost in single<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">digit dollars, and riding Moore's law to continuously =
reduce that<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">price point) are seen as essential enablers towards =
their deployment<br></font></font></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><span =
class=3D"Apple-tab-span" style=3D"white-space:pre"><font =
class=3D"Apple-style-span" face=3D"Courier">	</font></span><font =
class=3D"Apple-style-span" face=3D"Courier">in networks with the =
following =
characteristics...."</font></span><br></div><div><br></div><div><div><span=
 class=3D"Apple-tab-span" style=3D"white-space: pre; ">		=
</span>The 6lowpan charter even cites a milestone thus "Sep 2008:=A0Submit=
 Routing=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Requirements document to =
IESG for consideration as an Informational =
RFC"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Reading this indicates an =
overlap, and one could ask "Is ROLL the routing =
component=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>of 6low?". If yes, then =
this should probably be stated explicitly. If NO, then this =
probably</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>also should be stated =
explicitly -- and a justification given as =
well.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The same kind of argument =
can be made, let me cite from the MANET =
charter:<br></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"font-size: 16px; "><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px;">	 =
  "</span></font></span>The purpose of the MANET working group is to =
standardize IP routing</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>protocol functionality suitable for wireless routing =
application within<br><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>both static and dynamic =
topologies with increased dynamics due to node<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>motion or =
other factors"</font></font></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It does not explicitly enumerate the characteristics of "wireless =
routing", but again the relationship=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>with ROLL isn't clear.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
think that this is the biggest piece missing from this document -- and I =
think that it's=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a piece of paramount =
importance as well, so I really really think that we need =
to</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>write up something to clarify =
this.</div><div><br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I still =
see "Criteria" used, and I think that it's not the right term. =
"Evaluation metrics" seems=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a much more appropriate =
term. I've argued why in my previous review, and so I'll defer =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>that for details as to why -- but I REALLY do encourage =
changing the term.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
can say the magic word ("please"), if it helps any =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>There still are a few =
inconsistencies as to if not attaining a "pass" on all the =
evaluation=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>metrics means that the =
protocol:</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>is not a =
candidate at all<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used as-is, but may be modified to =
work<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Sections 1 (last =
paragraph), 3.2, 4.0 (2nd paragraph) send slightly different messages as =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>this.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>This ties in with another problem, that I just notice right now. =
Section 1 ends with:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"Whether or not such a protocol involves modifications to an =
existing</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 protocol =
or a new protocol entirely is outside the scope of this</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 document: this document simply seeks to answer the =
question: do LLNs</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 require a =
new protocol specification document at =
all?"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Which I can agree with, =
as such. However 3.2 reads:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"A protocol that does not meet the criteria cannot be used =
as</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>=A0=A0 specified, but it is possible that a protocol =
meets the criteria yet</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 is not =
able to meet the requirements of a particular application</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 domain.=A0 Nevertheless, a protocol that meets all of the =
criteria</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 would be =
very promising, and deserve a closer look and consideration</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 in light of LLN application =
domains."</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>And =
4.0:<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"If a protocol=A0=A0cannot meet even these minimalist criteria, =
then it cannot be used</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 unchanged =
in several major ROLL application domains and so is</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 unlikely to be a good candidate for use."</div> =
<div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The offending bits here =
are the last sentence in the quote from 3.2, and the=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>"is unlikely to be a good candidate for use" from =
4.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Now, 1 states that the =
goal simply is to identify "can an existing protocol=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>specification be used?".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>3.2 and 4.0 state, essentially, that the document go both beyond =
and below that,<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>by admitting that "no, we =
cannot answer that, the evaluation metrics =
presented=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>do not allow answering =
this question completely" -- and "oh, the document =
also<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>tries to identify =
protocols that could be further =
developed/investigated".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>In other words, the document sets out to do one thing, then =
doesn't quite do that,=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>but does something else. =
While I am sure that that's not the intent, it could =
be<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>read as if the document essentially had as =
objective to "dismiss all related IETF work"<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>-- and I'd really rather that we not be accused of that =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Security<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>It still troubles me a =
great deal that the "Security Considerations" section =
is<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>intentionally left blank. It strikes me that the =
different protocols discussed have<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>different properties with respect to how they can be secured -- =
and that this</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>discussion belongs in =
this document. If not, then I think the rationale as to =
why</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>this document does not consider security MUST be included in the =
security</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>considerations =
section.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Or, if security simply is =
not at all important in ROLL networks, then stating that</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>as reason for not discussing security would likely be =
enough?</div><div>=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I've made some additional =
comments to the evaluation of OLSR as well, I =
encourage<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that these be =
considered.<br></div><div><br></div><div>I think that these high-level =
points are important to get straightened out before moving this document =
forward. I see that others have raised issues as well, I'll reply to =
those with my =
comments.</div><div><br></div><div>Cheers,</div><div><br></div><div>Thomas=
</div><div><br></div><div></div><br></div><div></div><div><div></div></div=
></body></html>=

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Subject: [Roll] Oops, my comments were to draft-ietf-roll-protocols-survey Re: Review and comments on draft-ietf-roll-indus-routing-reqs-04.txt
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Someone just indicated to me that I cited the wrong I-D in <subj>.  
Mea culpa.

Thomas

On Jan 23, 2009, at 11:18 AM, Thomas Heide Clausen wrote:

> (I'm resending this, sans the attachment, as the attachment makes  
> the email wait for moderation and the WG chairs may likely be busy.  
> As we all want to see quick progress, I thought I'd send my "high- 
> level comments" through, so that we can start picking at those).
>
> Dear Authors, All,
>
> Since I'm taking stabs at 6lowpan here as well, I've included the  
> 6lowpan AD as Cc to this email.
>
> Thanks for producing an updated I-D so quickly. JP asked for a  
> quick turn-around on the review as well, and so I have reviewed the  
> document, and attached a pdf as I did last time, to include my  
> detailed/nittty-gritty comments as well.
>
> I think that the document has improved some, however I still have  
> some high-level comments, in addition to the nitty-gritty ones  
> included in the pdf and those that I raised in my -03 review which  
> are not yet addressed. I raise the high-level ones here, as those  
> are what I think we need to resolve before sending the document  
> onwards.
>
> 	o	I note that a number of my review comments from -03 have not  
> been addressed, and so
> 		I consider those to still be applicable and encourage that my -03  
> review be reconsidered.
> 		In particular, some of the comments which I would consider "easy  
> fixes" have not been
> 		incorporated. I wonder if it would be possible to expand on why not?
>
> 		That said, there are a number of also important comments  
> (terminology-confusion,
> 		omissions etc.) that I pointed out in my -03 review, which have  
> not been addressed
> 		(either through inclusion of text or through debunking on the 'list)
>
> 	o	It's still not clear how ROLL distinguishes itself from, say,  
> MANET or 6low. Many of the
> 		characteristics listed for ROLL deployments are isomorphic to  
> those listed for MANET
> 		and 6low, and even having read through the document(s) multiple  
> times, I'm still left
> 		having to guess.
>
> 		As the charter is relatively vague on this matter (it's not  
> really a criticism of the charter,
> 		it is as I think is reasonable for a wg with goal of "figuring  
> our what to do next"),
> 		I think it is a paramount requirement that this document -- which  
> aims at evaluating
> 		existing protocols for their applicability -- is extremely  
> specific on this matter.
>
> 		So, my BIGGEST issue remains: the document concludes that "no  
> existing protocols
> 		are applicable as-is" -- but does not spell out, or even hint at,  
> "applicable for what?"
>
> 		Would it be possible to add a section somewhere clearly stating  
> this?
>
> 		Let me cite from the 6low charter:
>
>
> 			  "Well-established fields such as control networks, and  
> burgeoning ones
> 	such as "sensor" (or transducer) networks, are increasingly being
> 	based on wireless technologies. Most (but certainly not all) of these
> 	nodes are amongst the most constrained that have ever been networked
> 	wirelessly. Extreme low power (such that they will run potentially  
> for
> 	years on batteries) and extreme low cost (total device cost in single
> 	digit dollars, and riding Moore's law to continuously reduce that
> 	price point) are seen as essential enablers towards their deployment
> 	in networks with the following characteristics...."
>
> 		The 6lowpan charter even cites a milestone thus "Sep 2008: Submit  
> Routing
> 		Requirements document to IESG for consideration as an  
> Informational RFC"
>
> 		Reading this indicates an overlap, and one could ask "Is ROLL the  
> routing component
> 		of 6low?". If yes, then this should probably be stated  
> explicitly. If NO, then this probably
> 		also should be stated explicitly -- and a justification given as  
> well.
>
> 		The same kind of argument can be made, let me cite from the MANET  
> charter:
>
> 	   "The purpose of the MANET working group is to standardize IP  
> routing
> 	protocol functionality suitable for wireless routing application  
> within
> 	both static and dynamic topologies with increased dynamics due to  
> node
> 	motion or other factors"
>
> 		It does not explicitly enumerate the characteristics of "wireless  
> routing", but again the relationship
> 		with ROLL isn't clear.
>
> 		I think that this is the biggest piece missing from this document  
> -- and I think that it's
> 		a piece of paramount importance as well, so I really really think  
> that we need to
> 		write up something to clarify this.
>
>
> 	o	I still see "Criteria" used, and I think that it's not the right  
> term. "Evaluation metrics" seems
> 		a much more appropriate term. I've argued why in my previous  
> review, and so I'll defer to
> 		that for details as to why -- but I REALLY do encourage changing  
> the term.
>
> 		I can say the magic word ("please"), if it helps any ;)
>
> 	o	There still are a few inconsistencies as to if not attaining a  
> "pass" on all the evaluation
> 		metrics means that the protocol:
>
> 			o	cannot be used
> 			o	is not a candidate at all
> 			o	cannot be used as-is, but may be modified to work
>
> 		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) send  
> slightly different messages as to
> 		this.
>
> 		This ties in with another problem, that I just notice right now.  
> Section 1 ends with:
>
> 			"Whether or not such a protocol involves modifications to an  
> existing
> 			   protocol or a new protocol entirely is outside the scope of this
> 			   document: this document simply seeks to answer the question:  
> do LLNs
> 			   require a new protocol specification document at all?"
>
> 		Which I can agree with, as such. However 3.2 reads:
>
> 			"A protocol that does not meet the criteria cannot be used as
> 			   specified, but it is possible that a protocol meets the  
> criteria yet
> 			   is not able to meet the requirements of a particular application
> 			   domain.  Nevertheless, a protocol that meets all of the criteria
> 			   would be very promising, and deserve a closer look and  
> consideration
> 			   in light of LLN application domains."
>
> 		And 4.0:
> 		
> 			"If a protocol  cannot meet even these minimalist criteria, then  
> it cannot be used
> 			   unchanged in several major ROLL application domains and so is
> 			   unlikely to be a good candidate for use."
>
>
> 		The offending bits here are the last sentence in the quote from  
> 3.2, and the
> 		"is unlikely to be a good candidate for use" from 4.
>
> 		Now, 1 states that the goal simply is to identify "can an  
> existing protocol
> 		specification be used?".
>
> 		3.2 and 4.0 state, essentially, that the document go both beyond  
> and below that,
> 		by admitting that "no, we cannot answer that, the evaluation  
> metrics presented
> 		do not allow answering this question completely" -- and "oh, the  
> document also
> 		tries to identify protocols that could be further developed/ 
> investigated".
>
> 		In other words, the document sets out to do one thing, then  
> doesn't quite do that,
> 		but does something else. While I am sure that that's not the  
> intent, it could be
> 		read as if the document essentially had as objective to "dismiss  
> all related IETF work"
> 		-- and I'd really rather that we not be accused of that ;)
>
> 	o	Security
> 		
> 		It still troubles me a great deal that the "Security  
> Considerations" section is
> 		intentionally left blank. It strikes me that the different  
> protocols discussed have
> 		different properties with respect to how they can be secured --  
> and that this
> 		discussion belongs in this document. If not, then I think the  
> rationale as to why
> 		this document does not consider security MUST be included in the  
> security
> 		considerations section.
>
> 		Or, if security simply is not at all important in ROLL networks,  
> then stating that
> 		as reason for not discussing security would likely be enough?
>
> 	o	I've made some additional comments to the evaluation of OLSR as  
> well, I encourage
> 		that these be considered.
>
> I think that these high-level points are important to get  
> straightened out before moving this document forward. I see that  
> others have raised issues as well, I'll reply to those with my  
> comments.
>
> Cheers,
>
> Thomas
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
Someone just indicated to me that I cited the wrong I-D in &lt;subj>. =
Mea culpa.=A0<div><br></div><div>Thomas</div><div><br><div><div>On Jan =
23, 2009, at 11:18 AM, Thomas Heide Clausen wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"> <div>(I'm =
resending this, sans the attachment, as the attachment makes the email =
wait for moderation and the WG chairs may likely be busy. As we all want =
to see quick progress, I thought I'd send my "high-level comments" =
through, so that we can start picking at =
those).</div><div><br></div>Dear Authors, All,<div><br></div><div>Since =
I'm taking stabs at 6lowpan here as well, I've included the 6lowpan AD =
as Cc to this email.</div><div><br></div><div>Thanks for producing an =
updated I-D so quickly. JP asked for a quick turn-around on the review =
as well, and so I have reviewed the document, and attached a pdf as I =
did last time, to include my detailed/nittty-gritty comments as =
well.=A0</div><div><br></div><div>I think that the document has improved =
some, however I still have some high-level comments, in addition to the =
nitty-gritty ones included in the pdf and those that I raised in my -03 =
review which are not yet addressed. I raise the high-level ones here, as =
those are what I think we need to resolve before sending the document =
onwards.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I note that a number of my review =
comments from -03 have not been addressed, and so<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
consider those to still be applicable and encourage that my -03 review =
be reconsidered.<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>In particular, some of =
the comments which I would consider "easy fixes" have not =
been<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>incorporated. I wonder if =
it would be possible to expand on why =
not?<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>That said, there are a =
number of also important comments =
(terminology-confusion,=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>omissions etc.) that I =
pointed out in my -03 review, which have not been =
addressed=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>(either through inclusion =
of text or through debunking on the =
'list)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>It's still not clear how ROLL =
distinguishes itself from, say, MANET or 6low. Many of =
the=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>characteristics listed for ROLL deployments are =
isomorphic to those listed for MANET=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>and 6low, and even having read through the document(s) multiple =
times, I'm still left<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>having =
to=A0guess.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>As the charter is =
relatively vague on this matter (it's not really a criticism of the =
charter,</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>it is as I think is =
reasonable for a wg with goal of "figuring our what to do =
next"),</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think it is a paramount =
requirement that this document -- which aims at =
evaluating<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>existing protocols for =
their applicability -- is extremely specific on this =
matter.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>So, my BIGGEST issue =
remains: the document concludes that "no existing =
protocols<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>are applicable as-is" -- =
but does not spell out, or even hint at, "applicable for =
what?"<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Would it be possible to =
add a section somewhere clearly stating =
this?</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Let me cite from=A0the =
6low charter:</div><div><br></div><div><br></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><font =
class=3D"Apple-style-span" face=3D"Courier"><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"3"><span class=3D"Apple-style-span" =
style=3D"font-size: 12px;">	<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>  =
"</span></font></span>Well-established fields such as control networks, =
and burgeoning ones</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>such as "sensor" (or transducer) networks, are =
increasingly being<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">based on wireless technologies. Most (but certainly not =
all) of these<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">nodes are amongst the most constrained that have ever =
been networked<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">wirelessly. Extreme low power (such that they will run =
potentially for<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">years on batteries) and extreme low cost (total device =
cost in single<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">digit dollars, and riding Moore's law to continuously =
reduce that<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">price point) are seen as essential enablers towards =
their deployment<br></font></font></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><span =
class=3D"Apple-tab-span" style=3D"white-space:pre"><font =
class=3D"Apple-style-span" face=3D"Courier">	</font></span><font =
class=3D"Apple-style-span" face=3D"Courier">in networks with the =
following =
characteristics...."</font></span><br></div><div><br></div><div><div><span=
 class=3D"Apple-tab-span" style=3D"white-space: pre; ">		=
</span>The 6lowpan charter even cites a milestone thus "Sep 2008:=A0Submit=
 Routing=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Requirements document to =
IESG for consideration as an Informational =
RFC"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Reading this indicates an =
overlap, and one could ask "Is ROLL the routing =
component=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>of 6low?". If yes, then =
this should probably be stated explicitly. If NO, then this =
probably</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>also should be stated =
explicitly -- and a justification given as =
well.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The same kind of argument =
can be made, let me cite from the MANET =
charter:<br></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"font-size: 16px; "><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px;">	 =
  "</span></font></span>The purpose of the MANET working group is to =
standardize IP routing</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>protocol functionality suitable for wireless routing =
application within<br><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>both static and dynamic =
topologies with increased dynamics due to node<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>motion or =
other factors"</font></font></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It does not explicitly enumerate the characteristics of "wireless =
routing", but again the relationship=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>with ROLL isn't clear.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
think that this is the biggest piece missing from this document -- and I =
think that it's=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a piece of paramount =
importance as well, so I really really think that we need =
to</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>write up something to clarify =
this.</div><div><br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I still =
see "Criteria" used, and I think that it's not the right term. =
"Evaluation metrics" seems=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a much more appropriate =
term. I've argued why in my previous review, and so I'll defer =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>that for details as to why -- but I REALLY do encourage =
changing the term.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
can say the magic word ("please"), if it helps any =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>There still are a few =
inconsistencies as to if not attaining a "pass" on all the =
evaluation=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>metrics means that the =
protocol:</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>is not a =
candidate at all<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used as-is, but may be modified to =
work<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Sections 1 (last =
paragraph), 3.2, 4.0 (2nd paragraph) send slightly different messages as =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>this.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>This ties in with another problem, that I just notice right now. =
Section 1 ends with:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"Whether or not such a protocol involves modifications to an =
existing</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 protocol =
or a new protocol entirely is outside the scope of this</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 document: this document simply seeks to answer the =
question: do LLNs</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 require a =
new protocol specification document at =
all?"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Which I can agree with, =
as such. However 3.2 reads:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"A protocol that does not meet the criteria cannot be used =
as</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>=A0=A0 specified, but it is possible that a protocol =
meets the criteria yet</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 is not =
able to meet the requirements of a particular application</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 domain.=A0 Nevertheless, a protocol that meets all of the =
criteria</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 would be =
very promising, and deserve a closer look and consideration</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 in light of LLN application =
domains."</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>And =
4.0:<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"If a protocol=A0=A0cannot meet even these minimalist criteria, =
then it cannot be used</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 unchanged =
in several major ROLL application domains and so is</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 unlikely to be a good candidate for use."</div> =
<div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The offending bits here =
are the last sentence in the quote from 3.2, and the=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>"is unlikely to be a good candidate for use" from =
4.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Now, 1 states that the =
goal simply is to identify "can an existing protocol=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>specification be used?".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>3.2 and 4.0 state, essentially, that the document go both beyond =
and below that,<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>by admitting that "no, we =
cannot answer that, the evaluation metrics =
presented=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>do not allow answering =
this question completely" -- and "oh, the document =
also<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>tries to identify =
protocols that could be further =
developed/investigated".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>In other words, the document sets out to do one thing, then =
doesn't quite do that,=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>but does something else. =
While I am sure that that's not the intent, it could =
be<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>read as if the document essentially had as =
objective to "dismiss all related IETF work"<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>-- and I'd really rather that we not be accused of that =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Security<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>It still troubles me a =
great deal that the "Security Considerations" section =
is<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>intentionally left blank. It strikes me that the =
different protocols discussed have<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>different properties with respect to how they can be secured -- =
and that this</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>discussion belongs in =
this document. If not, then I think the rationale as to =
why</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>this document does not consider security MUST be included in the =
security</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>considerations =
section.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Or, if security simply is =
not at all important in ROLL networks, then stating that</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>as reason for not discussing security would likely be =
enough?</div><div>=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I've made some additional =
comments to the evaluation of OLSR as well, I =
encourage<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that these be =
considered.<br></div><div><br></div><div>I think that these high-level =
points are important to get straightened out before moving this document =
forward. I see that others have raised issues as well, I'll reply to =
those with my =
comments.</div><div><br></div><div>Cheers,</div><div><br></div><div>Thomas=
</div><div><br></div><div></div><br></div><div></div><div><div></div></div=
><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; =
">_______________________________________________</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Roll mailing list</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><a =
href=3D"https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/m=
ailman/listinfo/roll</a></div> =
</blockquote></div><br></div></body></html>=

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From: JP Vasseur <jvasseur@cisco.com>
To: Thomas Heide Clausen <ietf@thomasclausen.org>
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Cc: Arsalan Tavakoli <arsalan@eecs.berkeley.edu>, "David E. Culler" <culler@eecs.berkeley.edu>, stevedh@cs.berkeley.edu, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] Review and comments on draft-ietf-roll-indus-routing-reqs-04.txt
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Hi Thomas,

On Jan 23, 2009, at 10:40 AM, Thomas Heide Clausen wrote:

> Dear Authors, All,
>
> Since I'm taking stabs at 6lowpan here as well, I've included the  
> 6lowpan AD as Cc to this email.
>
> Thanks for producing an updated I-D so quickly. JP asked for a quick  
> turn-around on the review as well, and so I have reviewed the  
> document, and attached a pdf as I did last time, to include my  
> detailed/nittty-gritty comments as well.
>

And thanks for this Thomas, we very much appreciate the detailed  
comments. As pointed in many emails we now passed WG LC several weeks,  
and I want to close on this work item *this week* so as not to further  
delay our progress as a WG. I know that you agree and understand.

> I think that the document has improved some, however I still have  
> some high-level comments, in addition to the nitty-gritty ones  
> included in the pdf and those that I raised in my -03 review which  
> are not yet addressed.

Let me reply on the high level comments and I'm sure that Phil and his  
co-authors will quickly address the other ones.

> I raise the high-level ones here, as those are what I think we need  
> to resolve before sending the document onwards.
>
> 	o	I note that a number of my review comments from -03 have not been  
> addressed, and so
> 		I consider those to still be applicable and encourage that my -03  
> review be reconsidered.
> 		In particular, some of the comments which I would consider "easy  
> fixes" have not been
> 		incorporated. I wonder if it would be possible to expand on why not?
>
> 		That said, there are a number of also important comments  
> (terminology-confusion,
> 		omissions etc.) that I pointed out in my -03 review, which have  
> not been addressed
> 		(either through inclusion of text or through debunking on the 'list)

I will work with Phil, Steve and Arsalan on these comments today and  
over the week-end if they are available to get then addressed.

>
>
> 	o	It's still not clear how ROLL distinguishes itself from, say,  
> MANET or 6low. Many of the
> 		characteristics listed for ROLL deployments are isomorphic to  
> those listed for MANET
> 		and 6low, and even having read through the document(s) multiple  
> times, I'm still left
> 		having to guess.

Ah you push my Hot Button ... since this discussion has been going on  
for some time, was entirely resolved and pops up again. As you know  
such questions are resolved when a WG is chartered (we are no longer  
in a WG formation process, BOF, ...). That being said, we owe you an  
answer. I'm just wondering whether we should try by writing or simply  
discussing in SFO. But for the time being I think that trying to  
position/compare/.... WGs is not that productive. The WG chairs are  
all in sync and we can find some time with you to clarify anything you  
want.

>
>
> 		As the charter is relatively vague on this matter (it's not really  
> a criticism of the charter,
> 		it is as I think is reasonable for a wg with goal of "figuring our  
> what to do next"),
> 		I think it is a paramount requirement that this document -- which  
> aims at evaluating
> 		existing protocols for their applicability -- is extremely  
> specific on this matter.
>
> 		So, my BIGGEST issue remains: the document concludes that "no  
> existing protocols
> 		are applicable as-is" -- but does not spell out, or even hint at,  
> "applicable for what?"
>
> 		Would it be possible to add a section somewhere clearly stating  
> this?

Of course. I thought that this has been clarified but let me try again  
and we'll draft a short text: the objective was to determine whether  
we could find an existing protocol (as is) in order to meet to  
requirements spelled out on the 4 WG documents for industrial  
automation, urban networks, home automation and building automation.  
That is it. You asked to clearly state that we should not exclude  
existing protocol from being extended in the future to meet these  
requirements, which we did, and we absolutely agree with you  
(something we discussed several time in ROLL WG meetings).

Yes we could add other criteria in the protocol survey, change  
them, ... but there was a good consensus in the WG to move ahead with  
these (necessary but not sufficient) criteria.

One (if) re-chartered for protocol work, we (as a WG) will look at  
various existing candidates (with potential extensions such as OLSR  
fish eye, RIP, ...) or new protocol. In the former we will of course  
closely work with the WGs that own these protocol in light of the  
application specific routing requirements.

>
> 		Let me cite from the 6low charter:
>
>
> 			  "Well-established fields such as control networks, and  
> burgeoning ones
> 	such as "sensor" (or transducer) networks, are increasingly being
> 	based on wireless technologies. Most (but certainly not all) of these
> 	nodes are amongst the most constrained that have ever been networked
> 	wirelessly. Extreme low power (such that they will run potentially  
> for
> 	years on batteries) and extreme low cost (total device cost in single
> 	digit dollars, and riding Moore's law to continuously reduce that
> 	price point) are seen as essential enablers towards their deployment
> 	in networks with the following characteristics...."
>
> 		The 6lowpan charter even cites a milestone thus "Sep 2008: Submit  
> Routing
> 		Requirements document to IESG for consideration as an  
> Informational RFC"
>
> 		Reading this indicates an overlap, and one could ask "Is ROLL the  
> routing component
> 		of 6low?". If yes, then this should probably be stated explicitly.  
> If NO, then this probably
> 		also should be stated explicitly -- and a justification given as  
> well.

No. We do not have in this document to put the relationship with all  
other WG in perspective. That being said, I am happy to provide you an  
explanation since this has been discussed many times in the past (in  
6lowpan and ROLL - look at the minutesm, "presentations", ...). I was  
personally opposed to see that 6lowpan WG item on routing since by  
definition routing is "agnostic" (not ignorant) to the PHY/MAC. The WG  
consensus was to have this WG item included the charter and consensus  
wins, which is a good thing :-) In its current form, I do not think  
that the WG ID is acceptable and I proposed (with the agreement of the  
6lowpan chairs and Mark) to propose a new revision so as to clearly  
state that these routing requirement will be 6lowpan specifics. ROL  
and 6lowpan will happily work together on this. Issue closed. Hope  
this sheds some light.

Now I cannot resist from making a general comment here: it is very  
much welcome to receive comments, guidance, ... but please do not re- 
open debates on which people have spent a lot of time and reached  
consensus. ROLL has been moving fast with a lot of energy and time  
from its active participants and I do not want to loose that traction  
and motion. Hope you understand.

>
>
> 		The same kind of argument can be made, let me cite from the MANET  
> charter:
>
> 	   "The purpose of the MANET working group is to standardize IP  
> routing
> 	protocol functionality suitable for wireless routing application  
> within
> 	both static and dynamic topologies with increased dynamics due to  
> node
> 	motion or other factors"
>
> 		It does not explicitly enumerate the characteristics of "wireless  
> routing", but again the relationship
> 		with ROLL isn't clear.

Note that we could do a similar exercise with many other WGs.

>
>
> 		I think that this is the biggest piece missing from this document  
> -- and I think that it's
> 		a piece of paramount importance as well, so I really really think  
> that we need to
> 		write up something to clarify this.
>

The relationship with 6lowpan is fairly clear and ROLL and 6lowpan  
works in concert. The only ambiguity was for the routing requirement  
ID in 6lowpan (which is about 6lowpan specific issue) for which I hope  
I clarified the situation. With regards to MANET, this is also fairly  
simple. Should we decide to use a routing protocol of the MANET WG, we  
will be more than happy to work with MANET to provide the requirements  
and get the protocol extensions worked out by the MANET WG. It is that  
simple :-)

>
> 	o	I still see "Criteria" used, and I think that it's not the right  
> term. "Evaluation metrics" seems
> 		a much more appropriate term. I've argued why in my previous  
> review, and so I'll defer to
> 		that for details as to why -- but I REALLY do encourage changing  
> the term.
>
> 		I can say the magic word ("please"), if it helps any ;)
>
> 	o	There still are a few inconsistencies as to if not attaining a  
> "pass" on all the evaluation
> 		metrics means that the protocol:
>
> 			o	cannot be used
> 			o	is not a candidate at all
> 			o	cannot be used as-is, but may be modified to work
>
> 		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) send  
> slightly different messages as to
> 		this.
>
> 		This ties in with another problem, that I just notice right now.  
> Section 1 ends with:
>
> 			"Whether or not such a protocol involves modifications to an  
> existing
> 			   protocol or a new protocol entirely is outside the scope of this
> 			   document: this document simply seeks to answer the question:  
> do LLNs
> 			   require a new protocol specification document at all?"
>
> 		Which I can agree with, as such. However 3.2 reads:
>
> 			"A protocol that does not meet the criteria cannot be used as
> 			   specified, but it is possible that a protocol meets the  
> criteria yet
> 			   is not able to meet the requirements of a particular application
> 			   domain.  Nevertheless, a protocol that meets all of the criteria
> 			   would be very promising, and deserve a closer look and  
> consideration
> 			   in light of LLN application domains."
>
> 		And 4.0:
> 		
> 			"If a protocol  cannot meet even these minimalist criteria, then  
> it cannot be used
> 			   unchanged in several major ROLL application domains and so is
> 			   unlikely to be a good candidate for use."
>
>
> 		The offending bits here are the last sentence in the quote from  
> 3.2, and the
> 		"is unlikely to be a good candidate for use" from 4.
>
> 		Now, 1 states that the goal simply is to identify "can an existing  
> protocol
> 		specification be used?".
>
> 		3.2 and 4.0 state, essentially, that the document go both beyond  
> and below that,
> 		by admitting that "no, we cannot answer that, the evaluation  
> metrics presented
> 		do not allow answering this question completely" -- and "oh, the  
> document also
> 		tries to identify protocols that could be further developed/ 
> investigated".
>
> 		In other words, the document sets out to do one thing, then  
> doesn't quite do that,
> 		but does something else. While I am sure that that's not the  
> intent, it could be
> 		read as if the document essentially had as objective to "dismiss  
> all related IETF work"
> 		-- and I'd really rather that we not be accused of that ;)
>

We will address these comments.

> 	o	Security
> 		
> 		It still troubles me a great deal that the "Security  
> Considerations" section is
> 		intentionally left blank. It strikes me that the different  
> protocols discussed have
> 		different properties with respect to how they can be secured --  
> and that this
> 		discussion belongs in this document. If not, then I think the  
> rationale as to why
> 		this document does not consider security MUST be included in the  
> security
> 		considerations section.
>

Just because we looked at the (necessary) but not sufficient criteria.

> 		Or, if security simply is not at all important in ROLL networks,  
> then stating that
> 		as reason for not discussing security would likely be enough?
>

Look at our charter, it is quite critical. But again, if a WG does not  
pass the existing criteria this is enough to conclude.

AGAIN, that does not mean that we will not use such a protocol with  
extensions at all. The question is" can we use this
protocol as-is" ?

>
> 	o	I've made some additional comments to the evaluation of OLSR as  
> well, I encourage
> 		that these be considered.
>
> I think that these high-level points are important to get  
> straightened out before moving this document forward. I see that  
> others have raised issues as well, I'll reply to those with my  
> comments.

Hope I clarified.

Thanks.

JP.

>
> Cheers,
>
> Thomas
>
> <draft-ietf-roll-protocols-survey-04_review.pdf>


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi Thomas,<div><br><div><div>On =
Jan 23, 2009, at 10:40 AM, Thomas Heide Clausen wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Dear Authors, =
All,<div><br></div><div>Since I'm taking stabs at 6lowpan here as well, =
I've included the 6lowpan AD as Cc to this =
email.</div><div><br></div><div>Thanks for producing an updated I-D so =
quickly. JP asked for a quick turn-around on the review as well, and so =
I have reviewed the document, and attached a pdf as I did last time, to =
include my detailed/nittty-gritty comments as =
well.&nbsp;</div><div><br></div></div></blockquote><div><br></div><div>And=
 thanks for this Thomas, we very much appreciate the detailed comments. =
As pointed in many emails we now passed WG LC several weeks, and I want =
to close on this work item *this week* so as not to further delay our =
progress as a WG. I know that you agree and =
understand.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div>I think that the document has improved some, =
however I still have some high-level comments, in addition to the =
nitty-gritty ones included in the pdf and those that I raised in my -03 =
review which are not yet addressed. =
</div></div></blockquote><div><br></div><div>Let me reply on the high =
level comments and I'm sure that Phil and his co-authors will quickly =
address the other ones.</div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div>I raise the high-level =
ones here, as those are what I think we need to resolve before sending =
the document onwards.</div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I note =
that a number of my review comments from -03 have not been addressed, =
and so<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I consider those to still =
be applicable and encourage that my -03 review be =
reconsidered.<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>In particular, some of =
the comments which I would consider "easy fixes" have not =
been<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>incorporated. I wonder if =
it would be possible to expand on why =
not?<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>That said, there are a =
number of also important comments =
(terminology-confusion,&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>omissions etc.) that I =
pointed out in my -03 review, which have not been =
addressed&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>(either through inclusion =
of text or through debunking on the =
'list)</div></div></blockquote><div><br></div><div>I will work with =
Phil, Steve and Arsalan on these comments today and over the week-end if =
they are available to get then addressed.</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>It's still not clear how ROLL =
distinguishes itself from, say, MANET or 6low. Many of =
the&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>characteristics listed =
for ROLL deployments are isomorphic to those listed for =
MANET&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>and 6low, and even having =
read through the document(s) multiple times, I'm still =
left<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>having =
to&nbsp;guess.</div></div></blockquote><div><br></div><div>Ah you push =
my Hot Button ... since this discussion has been going on for some time, =
was entirely resolved and pops up again. As you know such questions are =
resolved when a WG is chartered (we are no longer in a WG formation =
process, BOF, ...). That being said, we owe you an answer. I'm just =
wondering whether we should try by writing or simply discussing in SFO. =
But for the time being I think that trying to position/compare/.... WGs =
is not that productive. The WG chairs are all in sync and we can find =
some time with you to clarify anything you want.</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>As the charter is =
relatively vague on this matter (it's not really a criticism of the =
charter,</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>it is as I think is =
reasonable for a wg with goal of "figuring our what to do =
next"),</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think it is a paramount =
requirement that this document -- which aims at =
evaluating<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>existing protocols for =
their applicability -- is extremely specific on this =
matter.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>So, my BIGGEST issue =
remains: the document concludes that "no existing =
protocols<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>are applicable as-is" -- =
but does not spell out, or even hint at, "applicable for =
what?"<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Would it be possible to =
add a section somewhere clearly stating =
this?</div></div></blockquote><div><br></div><div>Of course. I thought =
that this has been clarified but let me try again and we'll draft a =
short text: the objective was to determine whether we could find an =
existing protocol (as is) in order to meet to requirements spelled out =
on the 4 WG documents for industrial automation, urban networks, home =
automation and building automation. That is it. You asked to clearly =
state that we should not exclude existing protocol from being extended =
in the future to meet these requirements, which we did, and we =
absolutely agree with you (something we discussed several time in ROLL =
WG meetings).</div><div><br></div><div>Yes we could add other criteria =
in the protocol survey, change them, ... but there was a good consensus =
in the WG to move ahead with these (necessary but not sufficient) =
criteria.</div><div><br></div><div>One (if) re-chartered for protocol =
work, we (as a WG) will look at various existing candidates (with =
potential extensions such as OLSR fish eye, RIP, ...) or new protocol. =
In the former we will of course closely work with the WGs that own these =
protocol in light of the application specific routing =
requirements.</div><div><br></div><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>Let me cite from&nbsp;the 6low =
charter:</div><div><br></div><div><br></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><font =
class=3D"Apple-style-span" face=3D"Courier"><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"3"><span class=3D"Apple-style-span" =
style=3D"font-size: 12px;">	<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>  =
"</span></font></span>Well-established fields such as control networks, =
and burgeoning ones</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>such as "sensor" (or transducer) networks, are =
increasingly being<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">based on wireless technologies. Most (but certainly not =
all) of these<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">nodes are amongst the most constrained that have ever =
been networked<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">wirelessly. Extreme low power (such that they will run =
potentially for<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">years on batteries) and extreme low cost (total device =
cost in single<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">digit dollars, and riding Moore's law to continuously =
reduce that<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">price point) are seen as essential enablers towards =
their deployment<br></font></font></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><span =
class=3D"Apple-tab-span" style=3D"white-space:pre"><font =
class=3D"Apple-style-span" face=3D"Courier">	</font></span><font =
class=3D"Apple-style-span" face=3D"Courier">in networks with the =
following =
characteristics...."</font></span><br></div><div><br></div><div><div><span=
 class=3D"Apple-tab-span" style=3D"white-space: pre; ">		=
</span>The 6lowpan charter even cites a milestone thus "Sep =
2008:&nbsp;Submit Routing&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Requirements document to =
IESG for consideration as an Informational =
RFC"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Reading this indicates an =
overlap, and one could ask "Is ROLL the routing =
component&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>of 6low?". If yes, then =
this should probably be stated explicitly. If NO, then this =
probably</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>also should be stated =
explicitly -- and a justification given as =
well.</div></div></div></blockquote><div><br></div><div>No. We do not =
have in this document to put the relationship with all other WG in =
perspective. That being said, I am happy to provide you an explanation =
since this has been discussed many times in the past (in 6lowpan and =
ROLL - look at the minutesm, "presentations", ...). I was personally =
opposed to see that 6lowpan WG item on routing since by definition =
routing is "agnostic" (not ignorant) to the PHY/MAC. The WG consensus =
was to have this WG item included the charter and consensus wins, which =
is a good thing :-) In its current form, I do not think that the WG ID =
is acceptable and I proposed (with the agreement of the 6lowpan chairs =
and Mark) to propose a new revision so as to clearly state that these =
routing requirement will be 6lowpan specifics. ROL and 6lowpan will =
happily work together on this. Issue closed. Hope this sheds some =
light.</div><div><br></div><div>Now I cannot resist from making a =
general comment here: it is very much welcome to receive comments, =
guidance, ... but please do not re-open debates on which people have =
spent a lot of time and reached consensus. ROLL has been moving fast =
with a lot of energy and time from its active participants and I do not =
want to loose that traction and motion. Hope you =
understand.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>The same kind of argument can be made, let me cite from the MANET =
charter:<br></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"font-size: 16px; "><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px;">	 =
  "</span></font></span>The purpose of the MANET working group is to =
standardize IP routing</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>protocol functionality suitable for wireless routing =
application within<br><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>both static and dynamic =
topologies with increased dynamics due to node<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>motion or =
other factors"</font></font></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It does not explicitly enumerate the characteristics of "wireless =
routing", but again the relationship&nbsp;</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>with ROLL isn't =
clear.</div></div></div></blockquote><div><br></div><div>Note that we =
could do a similar exercise with many other WGs.</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think that this is the =
biggest piece missing from this document -- and I think that =
it's&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a piece of paramount =
importance as well, so I really really think that we need =
to</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>write up something to clarify =
this.</div><div><br></div></div></div></blockquote><div><br></div><div>The=
 relationship with 6lowpan is fairly clear and ROLL and 6lowpan works in =
concert. The only ambiguity was for the routing requirement ID in =
6lowpan (which is about 6lowpan specific issue) for which I hope I =
clarified the situation. With regards to MANET, this is also fairly =
simple. Should we decide to use a routing protocol of the MANET WG, we =
will be more than happy to work with MANET to provide the requirements =
and get the protocol extensions worked out by the MANET WG. It is that =
simple :-)</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I still =
see "Criteria" used, and I think that it's not the right term. =
"Evaluation metrics" seems&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a much more appropriate =
term. I've argued why in my previous review, and so I'll defer =
to&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that for details as to =
why -- but I REALLY do encourage changing the =
term.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I can say the magic word =
("please"), if it helps any ;)<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>There =
still are a few inconsistencies as to if not attaining a "pass" on all =
the evaluation&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>metrics means that the =
protocol:</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>is not a =
candidate at all<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used as-is, but may be modified to =
work<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Sections 1 (last =
paragraph), 3.2, 4.0 (2nd paragraph) send slightly different messages as =
to&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		=
</span>this.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>This ties in with another =
problem, that I just notice right now. Section 1 ends =
with:<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>"Whether or not =
such a protocol involves modifications to an existing</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; protocol or a new protocol entirely is outside the =
scope of this</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
document: this document simply seeks to answer the question: do =
LLNs</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
		</span>&nbsp;&nbsp; require a new protocol specification =
document at all?"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Which I can agree with, =
as such. However 3.2 reads:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"A protocol that does not meet the criteria cannot be used =
as</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>&nbsp;&nbsp; specified, but it is possible that a =
protocol meets the criteria yet</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; is =
not able to meet the requirements of a particular application</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; domain.&nbsp; Nevertheless, a protocol that meets =
all of the criteria</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
would be very promising, and deserve a closer look and =
consideration</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; in =
light of LLN application domains."</div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>And 4.0:<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"If a protocol&nbsp;&nbsp;cannot meet even these minimalist =
criteria, then it cannot be used</div> <div><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
unchanged in several major ROLL application domains and so is</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; unlikely to be a good candidate for use."</div> =
<div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The offending bits here =
are the last sentence in the quote from 3.2, and =
the&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>"is unlikely to be a good =
candidate for use" from 4.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>Now, 1 states that the goal simply is to identify "can an =
existing protocol&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>specification be =
used?".<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>3.2 and 4.0 state, =
essentially, that the document go both beyond and below =
that,<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>by admitting that "no, we =
cannot answer that, the evaluation metrics =
presented&nbsp;<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>do not allow answering =
this question completely" -- and "oh, the document =
also<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>tries to identify =
protocols that could be further =
developed/investigated".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>In other words, the document sets out to do one thing, then =
doesn't quite do that,&nbsp;<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>but does something else. =
While I am sure that that's not the intent, it could =
be<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>read as if the document essentially had as =
objective to "dismiss all related IETF work"<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>-- and I'd really rather that we not be accused of that =
;)<br></div><div><br></div></div></div></blockquote><div><br></div><div>We=
 will address these comments.</div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Security<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It still troubles me a great deal that the "Security =
Considerations" section is<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>intentionally left blank. =
It strikes me that the different protocols discussed =
have<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>different properties with =
respect to how they can be secured -- and that this</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>discussion belongs in this document. If not, then I think the =
rationale as to why</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>this document does not =
consider security MUST be included in the security</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>considerations =
section.</div><div><br></div></div></div></blockquote><div><br></div><div>=
Just because we looked at the (necessary) but not sufficient =
criteria.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Or, if security simply is =
not at all important in ROLL networks, then stating that</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>as reason for not discussing security would likely be =
enough?</div><div>&nbsp;</div></div></div></blockquote><div><br></div><div=
>Look at our charter, it is quite critical. But again, if a WG does not =
pass the existing criteria this is enough to =
conclude.</div><div><br></div><div>AGAIN, that does not mean that we =
will not use such a protocol with extensions at all. The question is" =
can we use this</div><div>protocol as-is" ?</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I've made some additional =
comments to the evaluation of OLSR as well, I =
encourage<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that these be =
considered.<br></div><div><br></div><div>I think that these high-level =
points are important to get straightened out before moving this document =
forward. I see that others have raised issues as well, I'll reply to =
those with my =
comments.</div></div></div></blockquote><div><br></div><div>Hope I =
clarified.</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</=
div><br><blockquote type=3D"cite"><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div>Cheers,</div><div><br></div><div>Thomas</div><d=
iv><br></div><div></div></div><span>&lt;draft-ietf-roll-protocols-survey-0=
4_review.pdf></span></div><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div></div></div></div></blockquote></div><br></div></body></html>=

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Errors-To: roll-bounces@ietf.org Thomas Heide Clausen a =E9crit :
> =

> On Jan 21, 2009, at 17:22 PM, Alexandru Petrescu wrote:
> =

>> Philip Levis a =E9crit :
>>> On Jan 21, 2009, at 2:28 AM, Alexandru Petrescu wrote:
>>>> Philip Levis a =E9crit :
>>>>> Posting notice follows. I incorporated comments from Stephen =

>>>>> Farrell and Thomas Clausen. Notably:
>>>> [...]
>>>>> 3) Reworded NEMO exclusion text.
>>>> How?
>>> I'm sorry, this was incorrect. I reworded the DTN exclusion text to =

>>> include PROPHeT. The NEMO exclusion text remained unchanged.
>>
>> If we had ROLL requirements readable in terms similar to some Mobile IP
>> requirements then we could probably compare them and qualify NEMO for
>> ROLL, or disqualify.
>>
> =

> It actually calls out a good point: the survey I-D references a LOT of =

> requirements docs, which are not (yet) published as RFC. Any thoughts as =

> to if continued work on those requirements documents will in any way =

> alter the conclusions of this I-D?
> =

> I may not have been keeping up, but where are the requirements =

> documents, progress-wise, with respect to the survey I-D?

Well, if one considers that "Mobility" is mentioned at least thrice (in =

the industrial, home and building req drafts) then one doubts the =

drastic disqualification of NEMO by the protocol-survey does, at least =

beacause of the term 'Mobility' - NEMO stands for Network Mobility.

Alex

A synthesis of the reqs pulled out of the 4 ROLL reqs documents (urban, =

indus, home, building):

Requirements of Urban LLN Applications [not of routing?]:
1 Scalability: 10^2 to 10^4 sensing nodes
2 Parameter Constrained Routing: CPU, memory size, battery
3 Autonomous and Alien Configuration: 0-conf, self org topology change,
   multi-any-cast addressing, node mobility
4 Support of Highly Directed Information Flows: multiple paths towards
   the same destination
5 Support of Multicast, Anycast, and Implementation of Groupcast
6 Network Dynamicity: node association, disassociation and
   disappearance, locally optimized.
7 Latency: alert reporting solutions and to a certain extent queried
   reporting

Industrial reqs:
1 Reliability reqs: long
2 Device-aware routing reqs: battery, energy-state
3 Boradcast/Multicast: alerts to multiple servers, routers, subscribers
4 Route Establishment Time: seconds to minutes
5 Mobility: wireless worker, mobile field devices, speed 35kmph
6 Manageability: easy to deploy and manage

Unique Routing Requirements of Home Automation Applications:
1 Constraint-based Routing: CPU, memory, level of energy, sleep
   intervals, safety/convenience of changing battery
2 Support of Mobility: multi-purpose remote, mobile wearable
3 Sleeping nodes: wake-up 1 second
4 Healthcare Routing: locate new neighbor, battery, delivery of
   measurement data
5 Scalability: 250 devices
6 Convergence time: 0.5 seconds
7 Manageability: zero-conf, no human intervention
8 Stability: isolate misbehaving node

Building Automation Routing Requirements:
1 Installation: Zero-Configuration no commissioning, sleeping devices,
   local testing, device replacement
2 Scalability: area 50000-1000000 sq.ft. [4 645.152 - 92 903.04 square
   meters], 1000 routers 1000 hosts, 255 sensors, peer-to-peer
3 Mobility: mobile device association in 15s, location tracking
4 Resource Constrained Devices: power memory 10000 less than usual,
   limited processing power
5 Addressing: unicast, multicast, anycast
6 Manageability: firmware upgrades, diagnostics verbose mode, route
   tracking, path quality
7 Compatibility: IPv4, Maximum Packet Size 1526 octets
8 Route Selection: path cost, path adaptation, route redundancy, route
   discovery time 120msec, route preference, path persistence


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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Fri, 23 Jan 2009 11:39:00 +0100
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Subject: [Roll] Review and comments on draft-ietf-roll-protocols-survey-04.txt
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Dear Authors, All,

Since I'm taking stabs at 6lowpan here as well, I've included the =20
6lowpan AD as Cc to this email.

Thanks for producing an updated I-D so quickly. JP asked for a quick =20
turn-around on the review as well, and so I have reviewed the =20
document, and attached a pdf as I did last time, to include my =20
detailed/nittty-gritty comments as well.

I think that the document has improved some, however I still have =20
some high-level comments, in addition to the nitty-gritty ones =20
included in the pdf and those that I raised in my -03 review which =20
are not yet addressed. I raise the high-level ones here, as those are =20=

what I think we need to resolve before sending the document onwards.

	o	I note that a number of my review comments from -03 have =
not been =20
addressed, and so
		I consider those to still be applicable and encourage =
that my -03 =20
review be reconsidered.
		In particular, some of the comments which I would =
consider "easy =20
fixes" have not been
		incorporated. I wonder if it would be possible to expand =
on why not?

		That said, there are a number of also important comments =
=20
(terminology-confusion,
		omissions etc.) that I pointed out in my -03 review, =
which have not =20
been addressed
		(either through inclusion of text or through debunking =
on the 'list)

	o	It's still not clear how ROLL distinguishes itself from, =
say, =20
MANET or 6low. Many of the
		characteristics listed for ROLL deployments are =
isomorphic to those =20
listed for MANET
		and 6low, and even having read through the document(s) =
multiple =20
times, I'm still left
		having to guess.

		As the charter is relatively vague on this matter (it's =
not really =20
a criticism of the charter,
		it is as I think is reasonable for a wg with goal of =
"figuring our =20
what to do next"),
		I think it is a paramount requirement that this document =
-- which =20
aims at evaluating
		existing protocols for their applicability -- is =
extremely specific =20
on this matter.

		So, my BIGGEST issue remains: the document concludes =
that "no =20
existing protocols
		are applicable as-is" -- but does not spell out, or even =
hint at, =20
"applicable for what?"

		Would it be possible to add a section somewhere clearly =
stating this?

		Let me cite from the 6low charter:


			  "Well-established fields such as control =
networks, and =20
burgeoning ones
	such as "sensor" (or transducer) networks, are increasingly =
being
	based on wireless technologies. Most (but certainly not all) of =
these
	nodes are amongst the most constrained that have ever been =
networked
	wirelessly. Extreme low power (such that they will run =
potentially for
	years on batteries) and extreme low cost (total device cost in =
single
	digit dollars, and riding Moore's law to continuously reduce =
that
	price point) are seen as essential enablers towards their =
deployment
	in networks with the following characteristics...."

		The 6lowpan charter even cites a milestone thus "Sep =
2008: Submit =20
Routing
		Requirements document to IESG for consideration as an =
Informational =20
RFC"

		Reading this indicates an overlap, and one could ask "Is =
ROLL the =20
routing component
		of 6low?". If yes, then this should probably be stated =
explicitly. =20
If NO, then this probably
		also should be stated explicitly -- and a justification =
given as well.

		The same kind of argument can be made, let me cite from =
the MANET =20
charter:

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

		It does not explicitly enumerate the characteristics of =
"wireless =20
routing", but again the relationship
		with ROLL isn't clear.

		I think that this is the biggest piece missing from this =
document =20
-- and I think that it's
		a piece of paramount importance as well, so I really =
really think =20
that we need to
		write up something to clarify this.


	o	I still see "Criteria" used, and I think that it's not =
the right =20
term. "Evaluation metrics" seems
		a much more appropriate term. I've argued why in my =
previous =20
review, and so I'll defer to
		that for details as to why -- but I REALLY do encourage =
changing =20
the term.

		I can say the magic word ("please"), if it helps any ;)

	o	There still are a few inconsistencies as to if not =
attaining a =20
"pass" on all the evaluation
		metrics means that the protocol:

			o	cannot be used
			o	is not a candidate at all
			o	cannot be used as-is, but may be =
modified to work

		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) =
send slightly =20
different messages as to
		this.

		This ties in with another problem, that I just notice =
right now. =20
Section 1 ends with:

			"Whether or not such a protocol involves =
modifications to an existing
			   protocol or a new protocol entirely is =
outside the scope of this
			   document: this document simply seeks to =
answer the question: do =20
LLNs
			   require a new protocol specification document =
at all?"

		Which I can agree with, as such. However 3.2 reads:

			"A protocol that does not meet the criteria =
cannot be used as
			   specified, but it is possible that a protocol =
meets the =20
criteria yet
			   is not able to meet the requirements of a =
particular application
			   domain.  Nevertheless, a protocol that meets =
all of the criteria
			   would be very promising, and deserve a closer =
look and =20
consideration
			   in light of LLN application domains."

		And 4.0:
	=09
			"If a protocol  cannot meet even these =
minimalist criteria, then =20
it cannot be used
			   unchanged in several major ROLL application =
domains and so is
			   unlikely to be a good candidate for use."


		The offending bits here are the last sentence in the =
quote from =20
3.2, and the
		"is unlikely to be a good candidate for use" from 4.

		Now, 1 states that the goal simply is to identify "can =
an existing =20
protocol
		specification be used?".

		3.2 and 4.0 state, essentially, that the document go =
both beyond =20
and below that,
		by admitting that "no, we cannot answer that, the =
evaluation =20
metrics presented
		do not allow answering this question completely" -- and =
"oh, the =20
document also
		tries to identify protocols that could be further =
developed/=20
investigated".

		In other words, the document sets out to do one thing, =
then doesn't =20
quite do that,
		but does something else. While I am sure that that's not =
the =20
intent, it could be
		read as if the document essentially had as objective to =
"dismiss =20
all related IETF work"
		-- and I'd really rather that we not be accused of that =
;)

	o	Security
	=09
		It still troubles me a great deal that the "Security =20
Considerations" section is
		intentionally left blank. It strikes me that the =
different =20
protocols discussed have
		different properties with respect to how they can be =
secured -- and =20
that this
		discussion belongs in this document. If not, then I =
think the =20
rationale as to why
		this document does not consider security MUST be =
included in the =20
security
		considerations section.

		Or, if security simply is not at all important in ROLL =
networks, =20
then stating that
		as reason for not discussing security would likely be =
enough?

	o	I've made some additional comments to the evaluation of =
OLSR as =20
well, I encourage
		that these be considered.

I think that these high-level points are important to get =20
straightened out before moving this document forward. I see that =20
others have raised issues as well, I'll reply to those with my comments.

Cheers,

Thomas

=EF=BF=BC

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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
Dear Authors, All,<div><br></div><div>Since I'm taking stabs at 6lowpan =
here as well, I've included the 6lowpan AD as Cc to this =
email.</div><div><br></div><div>Thanks for producing an updated I-D so =
quickly. JP asked for a quick turn-around on the review as well, and so =
I have reviewed the document, and attached a pdf as I did last time, to =
include my detailed/nittty-gritty comments as =
well.=A0</div><div><br></div><div>I think that the document has improved =
some, however I still have some high-level comments, in addition to the =
nitty-gritty ones included in the pdf and those that I raised in my -03 =
review which are not yet addressed. I raise the high-level ones here, as =
those are what I think we need to resolve before sending the document =
onwards.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I note that a number of my review =
comments from -03 have not been addressed, and so<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
consider those to still be applicable and encourage that my -03 review =
be reconsidered.<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>In particular, some of =
the comments which I would consider "easy fixes" have not =
been<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>incorporated. I wonder if =
it would be possible to expand on why =
not?<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>That said, there are a =
number of also important comments =
(terminology-confusion,=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>omissions etc.) that I =
pointed out in my -03 review, which have not been =
addressed=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>(either through inclusion =
of text or through debunking on the =
'list)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>It's still not clear how ROLL =
distinguishes itself from, say, MANET or 6low. Many of =
the=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>characteristics listed for ROLL deployments are =
isomorphic to those listed for MANET=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>and 6low, and even having read through the document(s) multiple =
times, I'm still left<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>having =
to=A0guess.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>As the charter is =
relatively vague on this matter (it's not really a criticism of the =
charter,</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>it is as I think is =
reasonable for a wg with goal of "figuring our what to do =
next"),</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think it is a paramount =
requirement that this document -- which aims at =
evaluating<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>existing protocols for =
their applicability -- is extremely specific on this =
matter.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>So, my BIGGEST issue =
remains: the document concludes that "no existing =
protocols<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>are applicable as-is" -- =
but does not spell out, or even hint at, "applicable for =
what?"<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Would it be possible to =
add a section somewhere clearly stating =
this?</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Let me cite from=A0the =
6low charter:</div><div><br></div><div><br></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><font =
class=3D"Apple-style-span" face=3D"Courier"><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"3"><span class=3D"Apple-style-span" =
style=3D"font-size: 12px;">	<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>  =
"</span></font></span>Well-established fields such as control networks, =
and burgeoning ones</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>such as "sensor" (or transducer) networks, are =
increasingly being<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">based on wireless technologies. Most (but certainly not =
all) of these<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">nodes are amongst the most constrained that have ever =
been networked<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">wirelessly. Extreme low power (such that they will run =
potentially for<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">years on batteries) and extreme low cost (total device =
cost in single<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">digit dollars, and riding Moore's law to continuously =
reduce that<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">price point) are seen as essential enablers towards =
their deployment<br></font></font></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><span =
class=3D"Apple-tab-span" style=3D"white-space:pre"><font =
class=3D"Apple-style-span" face=3D"Courier">	</font></span><font =
class=3D"Apple-style-span" face=3D"Courier">in networks with the =
following =
characteristics...."</font></span><br></div><div><br></div><div><div><span=
 class=3D"Apple-tab-span" style=3D"white-space: pre; ">		=
</span>The 6lowpan charter even cites a milestone thus "Sep 2008:=A0Submit=
 Routing=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Requirements document to =
IESG for consideration as an Informational =
RFC"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Reading this indicates an =
overlap, and one could ask "Is ROLL the routing =
component=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>of 6low?". If yes, then =
this should probably be stated explicitly. If NO, then this =
probably</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>also should be stated =
explicitly -- and a justification given as =
well.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The same kind of argument =
can be made, let me cite from the MANET =
charter:<br></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"font-size: 16px; "><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px;">	 =
  "</span></font></span>The purpose of the MANET working group is to =
standardize IP routing</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>protocol functionality suitable for wireless routing =
application within<br><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>both static and dynamic =
topologies with increased dynamics due to node<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>motion or =
other factors"</font></font></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It does not explicitly enumerate the characteristics of "wireless =
routing", but again the relationship=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>with ROLL isn't clear.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
think that this is the biggest piece missing from this document -- and I =
think that it's=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a piece of paramount =
importance as well, so I really really think that we need =
to</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>write up something to clarify =
this.</div><div><br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I still =
see "Criteria" used, and I think that it's not the right term. =
"Evaluation metrics" seems=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a much more appropriate =
term. I've argued why in my previous review, and so I'll defer =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>that for details as to why -- but I REALLY do encourage =
changing the term.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		</span>I =
can say the magic word ("please"), if it helps any =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>There still are a few =
inconsistencies as to if not attaining a "pass" on all the =
evaluation=A0</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>metrics means that the =
protocol:</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>is not a =
candidate at all<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used as-is, but may be modified to =
work<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Sections 1 (last =
paragraph), 3.2, 4.0 (2nd paragraph) send slightly different messages as =
to=A0</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
	</span>this.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>This ties in with another problem, that I just notice right now. =
Section 1 ends with:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"Whether or not such a protocol involves modifications to an =
existing</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 protocol =
or a new protocol entirely is outside the scope of this</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 document: this document simply seeks to answer the =
question: do LLNs</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 require a =
new protocol specification document at =
all?"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Which I can agree with, =
as such. However 3.2 reads:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"A protocol that does not meet the criteria cannot be used =
as</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>=A0=A0 specified, but it is possible that a protocol =
meets the criteria yet</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 is not =
able to meet the requirements of a particular application</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 domain.=A0 Nevertheless, a protocol that meets all of the =
criteria</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 would be =
very promising, and deserve a closer look and consideration</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 in light of LLN application =
domains."</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>And =
4.0:<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"If a protocol=A0=A0cannot meet even these minimalist criteria, =
then it cannot be used</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>=A0=A0 unchanged =
in several major ROLL application domains and so is</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>=A0=A0 unlikely to be a good candidate for use."</div> =
<div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The offending bits here =
are the last sentence in the quote from 3.2, and the=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>"is unlikely to be a good candidate for use" from =
4.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Now, 1 states that the =
goal simply is to identify "can an existing protocol=A0</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>specification be used?".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>3.2 and 4.0 state, essentially, that the document go both beyond =
and below that,<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>by admitting that "no, we =
cannot answer that, the evaluation metrics =
presented=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>do not allow answering =
this question completely" -- and "oh, the document =
also<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>tries to identify =
protocols that could be further =
developed/investigated".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>In other words, the document sets out to do one thing, then =
doesn't quite do that,=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>but does something else. =
While I am sure that that's not the intent, it could =
be<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>read as if the document essentially had as =
objective to "dismiss all related IETF work"<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>-- and I'd really rather that we not be accused of that =
;)<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Security<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>It still troubles me a =
great deal that the "Security Considerations" section =
is<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>intentionally left blank. It strikes me that the =
different protocols discussed have<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>different properties with respect to how they can be secured -- =
and that this</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>discussion belongs in =
this document. If not, then I think the rationale as to =
why</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>this document does not consider security MUST be included in the =
security</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>considerations =
section.</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Or, if security simply is =
not at all important in ROLL networks, then stating that</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>as reason for not discussing security would likely be =
enough?</div><div>=A0<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I've made some additional =
comments to the evaluation of OLSR as well, I =
encourage<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that these be =
considered.<br></div><div><br></div><div>I think that these high-level =
points are important to get straightened out before moving this document =
forward. I see that others have raised issues as well, I'll reply to =
those with my =
comments.</div><div><br></div><div>Cheers,</div><div><br></div><div>Thomas=
</div><div><br></div><div></div></div></body></html>=

--Apple-Mail-32-996870013
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Errors-To: roll-bounces@ietf.org On Jan 23, 2009, at 1:43 AM, Thomas Heide Clausen wrote:

>
> On Jan 20, 2009, at 20:45 PM, Philip Levis wrote:
>
>> Posting notice follows.
>>
>> I incorporated comments from Stephen Farrell and Thomas Clausen.  
>> Notably:
>>
>> 1) Tweaked language in abstract. Changed "mature draft" to  
>> "working item of an IETF WG".
>>
>
> Good.
>
>> 2) Tweaked too strong sentence in 4 from "from analysis and  
>> examination" to "use" and added "unchanged" qualifier.
>>
>
> Good.
>
>> 3) Reworded NEMO exclusion text.
>>
>> 4) Restructured methodology section, broke into subsections to  
>> delineate protocol selection from criteria. Had selection define  
>> positive as well as negative cases. Did not restructure exactly as  
>> Thomas proposed, but tried to delineate the applicability section.  
>> Separating protocol applicability into another section while  
>> keeping criteria under methodology seemed uneven.
>
> Good, my proposal was just one way -- others work as well.
>
>>
>> 5) Incorporated nits from Thomas: spelling, grammar, note on OLSR  
>> flooding, etc.
>>
>
> Thanks.
>
>> 6) Made document consistent in use of the term "criterion."  Chose  
>> criterion over metric because metric is used in a variety of  
>> places, e.g., for links, and implies a measurement. In contrast,  
>> we are considering an analysis.
>
> Ok, almost but not quite: there's still a lingering "requirement"  
> somewhere, I think I've indicated in my latest review as well.
>
> I still think that criterion sends the wrong message -- I  
> understand that "metric" is overloaded. Can we think up another  
> term to satisfy all?


I have to disagree on this one. The OED says:

criterion: a principle or standard by which something may be judged  
or decided

metric: a system or standard of measurement

We aren't measuring; we're judging whether, based on analysis and  
thought, a given protocol has a certain property. To be absolutely  
precise, one would say that the five columns are in the table are  
criteria, and the metric we use to judge them is big-O notation of  
particular properties. Does that make sense? Sorry to be such a  
stickler; I am a bit of a precision nut when it comes to English.



>
>> We've been in last call a long time now!!
>
> I'm not trying purposely to be a pain, but consider this document  
> important to get right, and so I try to contribute what I can. I  
> should say, thought, that the authors have been quite good at quick  
> turn-arounds, and deserve credit and thanks for that.
>

Thanks! It goes without saying (er, except I'm saying it) that your  
detailed comments on the entire document are greatly appreciated.

Phil
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Subject: Re: [Roll] Review and comments on draft-ietf-roll-indus-routing-reqs-04.txt
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Errors-To: roll-bounces@ietf.org Comments inline.

On Jan 23, 2009, at 1:40 AM, Thomas Heide Clausen wrote:

> Dear Authors, All,
>
> Since I'm taking stabs at 6lowpan here as well, I've included the  
> 6lowpan AD as Cc to this email.
>
> Thanks for producing an updated I-D so quickly. JP asked for a  
> quick turn-around on the review as well, and so I have reviewed the  
> document, and attached a pdf as I did last time, to include my  
> detailed/nittty-gritty comments as well.

I think it's a bit beyond me to engage in the entire ROLL/MANET/ 
6lowpan debate. So I'll keep my replies constrained to comments on  
the document itself.
>
> 	o	I still see "Criteria" used, and I think that it's not the right  
> term. "Evaluation metrics" seems
> 		a much more appropriate term. I've argued why in my previous  
> review, and so I'll defer to
> 		that for details as to why -- but I REALLY do encourage changing  
> the term.
>
> 		I can say the magic word ("please"), if it helps any ;)

Response on the ROLL list; I have to respectfully disagree based on  
the literal meanings of the terms. Pass/fail/? are criteria; the big- 
O notation used to reach them is the metric.

>
>
> 	o	There still are a few inconsistencies as to if not attaining a  
> "pass" on all the evaluation
> 		metrics means that the protocol:
>
> 			o	cannot be used
> 			o	is not a candidate at all
> 			o	cannot be used as-is, but may be modified to work
>
> 		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) send  
> slightly different messages as to
> 		this.
>
> 		This ties in with another problem, that I just notice right now.  
> Section 1 ends with:
>
> 			"Whether or not such a protocol involves modifications to an  
> existing
> 			   protocol or a new protocol entirely is outside the scope of this
> 			   document: this document simply seeks to answer the question:  
> do LLNs
> 			   require a new protocol specification document at all?"
>
> 		Which I can agree with, as such. However 3.2 reads:
>
> 			"A protocol that does not meet the criteria cannot be used as
> 			   specified, but it is possible that a protocol meets the  
> criteria yet
> 			   is not able to meet the requirements of a particular application
> 			   domain.  Nevertheless, a protocol that meets all of the criteria
> 			   would be very promising, and deserve a closer look and  
> consideration
> 			   in light of LLN application domains."
>
> 		And 4.0:
> 		
> 			"If a protocol  cannot meet even these minimalist criteria, then  
> it cannot be used
> 			   unchanged in several major ROLL application domains and so is
> 			   unlikely to be a good candidate for use."
>
>
> 		The offending bits here are the last sentence in the quote from  
> 3.2, and the
> 		"is unlikely to be a good candidate for use" from 4.
>
> 		Now, 1 states that the goal simply is to identify "can an  
> existing protocol
> 		specification be used?".
>
> 		3.2 and 4.0 state, essentially, that the document go both beyond  
> and below that,
> 		by admitting that "no, we cannot answer that, the evaluation  
> metrics presented
> 		do not allow answering this question completely" -- and "oh, the  
> document also
> 		tries to identify protocols that could be further developed/ 
> investigated".
>
> 		In other words, the document sets out to do one thing, then  
> doesn't quite do that,
> 		but does something else. While I am sure that that's not the  
> intent, it could be
> 		read as if the document essentially had as objective to "dismiss  
> all related IETF work"
> 		-- and I'd really rather that we not be accused of that ;)

Hrm. Let me try to work through this.

The issue is that we'll only know if a protocol can be used is by,  
well, using it. Given the large number of protocols out there, asking  
ROLL folks to implement them all and start testing is a bad idea.  
Instead, we want to get some sense of what is promising and what is not.

The Section 1 quote describes the high order bit: does ROLL have to  
write new protocol specification documents? Note that this is  
actually a implication, in the logical sense:

if no protocol has all passes -> ROLL needs to work on protocol  
specification

In that way, it answers the question at the end of Section 1.

The Section 3.2 quote is about the case where a protocol has all  
passes. Simply put, if a protocol has all passes, we don't know if  
further specification is needed. It might be that other  
considerations besides the criteria in the document (e.g.,  
application specific, security, as you mention) require such work.  
But the fact that a protocol has all passes means that we should look  
at it closely.

The Section 4 quote might come across as stronger than it's supposed  
to be. The implicit statement here is that there are more ROLL  
application domains than those in the application documents. The  
point is that if a protocol can't meet the minimal requirements of  
those applications, it can't be used in those apps and, given a  
random other application, is unlikely to be a good choice.



>
>
> 	o	Security
> 		
> 		It still troubles me a great deal that the "Security  
> Considerations" section is
> 		intentionally left blank. It strikes me that the different  
> protocols discussed have
> 		different properties with respect to how they can be secured --  
> and that this
> 		discussion belongs in this document. If not, then I think the  
> rationale as to why
> 		this document does not consider security MUST be included in the  
> security
> 		considerations section.
>
> 		Or, if security simply is not at all important in ROLL networks,  
> then stating that
> 		as reason for not discussing security would likely be enough?

Security is important. But a lot of things are important. "Necessary  
but not sufficient." I think that pulling security into the picture  
will complicate things greatly, in part because it's one place where  
application domains differ tremendously. We tried to pick the  
criteria such that they were common across the application domains.  
But industrial monitoring has very different security requirements  
than home networks.



>
> 	o	I've made some additional comments to the evaluation of OLSR as  
> well, I encourage
> 		that these be considered.

I don't see them -- I see some terminology points (e.g., MANET versus  
mesh network); I thought I had addressed the fact that OLSRv2 can  
have a minimum interval between control messages?

The one major comment that seems to be outstanding is the control  
overhead. On one hand, I agree that ultimately what you care about is  
the overall cost of delivering packets. However, the recent compact  
routing work has shown that routing state, route stretch, and control  
traffic are all tightly entwined. I really don't think it would be  
helpful -- or productive, given the complexity of the problem -- to  
start carving out what subsets of this design space are acceptable  
for ROLL. Rather, the document just gives a very basic requirement;  
while it might not be tight enough, there are plenty of protocols  
that don't meet it.

Phil


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Cc: Arsalan Tavakoli <arsalan@eecs.berkeley.edu>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] Review and comments on draft-ietf-roll-indus-routing-reqs-04.txt
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Let me reinforce JPs comments.&nbsp; And I'll apologize for any lack of
political correctness in advance.&nbsp; Patience wears thin.&nbsp; <br>
<br>
The continuous working group politicing is counter productive.&nbsp; Not
being a longtime IETF participant, I am impressed that ROLL took such a
disciplined approach of due diligence before embarking on development.&nbsp;
This meant extensive efforts to cull requirements from application
domains.&nbsp; It meant extensive efforts to survey potential existing
alternatives.&nbsp; I've not seen this level of diligence in any stadards
working group.&nbsp; All this so that we can unequivocally embark on the
beginning of a course of development.&nbsp; Not the end - the beginning. &nbsp;
Many of the interested parties are keen to have some variant of their
particular candidate be the basis of that development.&nbsp; Wonderful.&nbsp; We
welcome the running start.&nbsp; But, instead of recognizing that a huge
amount of due diligence has been performed - way beyond any reasonable
expectation - and embracing that we can finally move forward, there is
endless, counter-productive grumping and game playing.&nbsp; "But you didn't
look at this"&nbsp; "But maybe we can change the rules of the comparison
like that"&nbsp; "But this possible future change will improve the
evaluation of that", "But isn't the charter vague"&nbsp; "But should this
all be under some other group" and on and on.&nbsp; It is time for that to
stop.&nbsp; Rough consensus and running code.&nbsp; We have the hardest work
ahead.&nbsp; Completing the survey and the requirements does not rule out
anyone's favorite candidate.&nbsp; But it does allow us to get on with the
real work.&nbsp; So, let's get on with it.<br>
<br>
JP Vasseur wrote:
<blockquote cite="mid:C1A2E65F-E5D8-41BC-94EE-F12F1409F2ED@cisco.com"
 type="cite">Hi Thomas,
  <div><br>
  <div>
  <div>On Jan 23, 2009, at 10:40 AM, Thomas Heide Clausen wrote:</div>
  <br class="Apple-interchange-newline">
  <blockquote type="cite">
    <div style="">Dear Authors, All,
    <div><br>
    </div>
    <div>Since I'm taking stabs at 6lowpan here as well, I've included
the 6lowpan AD as Cc to this email.</div>
    <div><br>
    </div>
    <div>Thanks for producing an updated I-D so quickly. JP asked for a
quick turn-around on the review as well, and so I have reviewed the
document, and attached a pdf as I did last time, to include my
detailed/nittty-gritty comments as well.&nbsp;</div>
    <div><br>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>And thanks for this Thomas, we very much appreciate the detailed
comments. As pointed in many emails we now passed WG LC several weeks,
and I want to close on this work item *this week* so as not to further
delay our progress as a WG. I know that you agree and understand.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>I think that the document has improved some, however I still
have some high-level comments, in addition to the nitty-gritty ones
included in the pdf and those that I raised in my -03 review which are
not yet addressed. </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Let me reply on the high level comments and I'm sure that Phil
and his co-authors will quickly address the other ones.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>I raise the high-level ones here, as those are what I think we
need to resolve before sending the document onwards.</div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>I note that
a number of my review comments from -03 have not been addressed, and so<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>I
consider those to still be applicable and encourage that my -03 review
be reconsidered.<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>In
particular, some of the comments which I would consider "easy fixes"
have not been<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>incorporated.
I wonder if it would be possible to expand on why not?<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>That
said, there are a number of also important comments
(terminology-confusion,&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>omissions
etc.) that I pointed out in my -03 review, which have not been
addressed&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>(either
through inclusion of text or through debunking on the 'list)</div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>I will work with Phil, Steve and Arsalan on these comments today
and over the week-end if they are available to get then addressed.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>It's still
not clear how ROLL distinguishes itself from, say, MANET or 6low. Many
of the&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>characteristics
listed for ROLL deployments are isomorphic to those listed for MANET&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>and
6low, and even having read through the document(s) multiple times, I'm
still left<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>having
to&nbsp;guess.</div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Ah you push my Hot Button ... since this discussion has been
going on for some time, was entirely resolved and pops up again. As you
know such questions are resolved when a WG is chartered (we are no
longer in a WG formation process, BOF, ...). That being said, we owe
you an answer. I'm just wondering whether we should try by writing or
simply discussing in SFO. But for the time being I think that trying to
position/compare/.... WGs is not that productive. The WG chairs are all
in sync and we can find some time with you to clarify anything you want.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>As
the charter is relatively vague on this matter (it's not really a
criticism of the charter,</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>it
is as I think is reasonable for a wg with goal of "figuring our what to
do next"),</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>I
think it is a paramount requirement that this document -- which aims at
evaluating<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>existing
protocols for their applicability -- is extremely specific on this
matter.<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>So,
my BIGGEST issue remains: the document concludes that "no existing
protocols<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>are
applicable as-is" -- but does not spell out, or even hint at,
"applicable for what?"<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Would
it be possible to add a section somewhere clearly stating this?</div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Of course. I thought that this has been clarified but let me try
again and we'll draft a short text: the objective was to determine
whether we could find an existing protocol (as is) in order to meet to
requirements spelled out on the 4 WG documents for industrial
automation, urban networks, home automation and building automation.
That is it. You asked to clearly state that we should not exclude
existing protocol from being extended in the future to meet these
requirements, which we did, and we absolutely agree with you (something
we discussed several time in ROLL WG meetings).</div>
  <div><br>
  </div>
  <div>Yes we could add other criteria in the protocol survey, change
them, ... but there was a good consensus in the WG to move ahead with
these (necessary but not sufficient) criteria.</div>
  <div><br>
  </div>
  <div>One (if) re-chartered for protocol work, we (as a WG) will look
at various existing candidates (with potential extensions such as OLSR
fish eye, RIP, ...) or new protocol. In the former we will of course
closely work with the WGs that own these protocol in light of the
application specific routing requirements.</div>
  <div><br>
  </div>
  <blockquote type="cite">
    <div style="">
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Let
me cite from&nbsp;the 6low charter:</div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-style-span" style="font-size: 16px;"><font
 class="Apple-style-span" face="Courier"><span class="Apple-tab-span"
 style="white-space: pre;"><font class="Apple-style-span"
 face="Helvetica" size="3"><span class="Apple-style-span"
 style="font-size: 12px;"> <span class="Apple-tab-span"
 style="white-space: pre;"> </span> "</span></font></span>Well-established
fields such as control networks, and burgeoning ones</font></span></div>
    <div style="margin: 0px;"><font
 style="font-family: Times; font-style: normal; font-variant: normal; font-weight: normal; font-size: 16px; line-height: normal; font-size-adjust: none; font-stretch: normal;"
 size="5"><font class="Apple-style-span" face="Courier"><span
 class="Apple-tab-span" style="white-space: pre;"> </span>such as
"sensor" (or transducer) networks, are increasingly being<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">based on wireless
technologies. Most (but certainly not all) of these<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">nodes are amongst the most
constrained that have ever been networked<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">wirelessly. Extreme low power
(such that they will run potentially for<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">years on batteries) and
extreme low cost (total device cost in single<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">digit dollars, and riding
Moore's law to continuously reduce that<br>
    </font><span class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">price point) are seen as
essential enablers towards their deployment<br>
    </font></font></div>
    <div><span class="Apple-style-span" style="font-size: 16px;"><span
 class="Apple-tab-span" style="white-space: pre;"><font
 class="Apple-style-span" face="Courier"> </font></span><font
 class="Apple-style-span" face="Courier">in networks with the following
characteristics...."</font></span><br>
    </div>
    <div><br>
    </div>
    <div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>The
6lowpan charter even cites a milestone thus "Sep 2008:&nbsp;Submit Routing&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Requirements
document to IESG for consideration as an Informational RFC"</div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Reading
this indicates an overlap, and one could ask "Is ROLL the routing
component&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>of
6low?". If yes, then this should probably be stated explicitly. If NO,
then this probably</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>also
should be stated explicitly -- and a justification given as well.</div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>No. We do not have in this document to put the relationship with
all other WG in perspective. That being said, I am happy to provide you
an explanation since this has been discussed many times in the past (in
6lowpan and ROLL - look at the minutesm, "presentations", ...). I was
personally opposed to see that 6lowpan WG item on routing since by
definition routing is "agnostic" (not ignorant) to the PHY/MAC. The WG
consensus was to have this WG item included the charter and consensus
wins, which is a good thing :-) In its current form, I do not think
that the WG ID is acceptable and I proposed (with the agreement of the
6lowpan chairs and Mark) to propose a new revision so as to clearly
state that these routing requirement will be 6lowpan specifics. ROL and
6lowpan will happily work together on this. Issue closed. Hope this
sheds some light.</div>
  <div><br>
  </div>
  <div>Now I cannot resist from making a general comment here: it is
very much welcome to receive comments, guidance, ... but please do not
re-open debates on which people have spent a lot of time and reached
consensus. ROLL has been moving fast with a lot of energy and time from
its active participants and I do not want to loose that traction and
motion. Hope you understand.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>The
same kind of argument can be made, let me cite from the MANET charter:<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-style-span" style="font-size: 16px;"><font
 class="Apple-style-span" face="Courier"><span class="Apple-tab-span"
 style="white-space: pre;"><font class="Apple-style-span" size="3"><span
 class="Apple-style-span" style="font-size: 12px;"> "</span></font></span>The
purpose of the MANET working group is to standardize IP routing</font></span></div>
    <div style="margin: 0px;"><font
 style="font-family: Times; font-style: normal; font-variant: normal; font-weight: normal; font-size: 16px; line-height: normal; font-size-adjust: none; font-stretch: normal;"
 size="5"><font class="Apple-style-span" face="Courier"><span
 class="Apple-tab-span" style="white-space: pre;"> </span>protocol
functionality suitable for wireless routing application within<br>
    <span class="Apple-tab-span" style="white-space: pre;"> </span>both
static and dynamic topologies with increased dynamics due to node<br>
    <span class="Apple-tab-span" style="white-space: pre;"> </span>motion
or other factors"</font></font></div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>It
does not explicitly enumerate the characteristics of "wireless
routing", but again the relationship&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>with
ROLL isn't clear.</div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Note that we could do a similar exercise with many other WGs.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>I
think that this is the biggest piece missing from this document -- and
I think that it's&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>a
piece of paramount importance as well, so I really really think that we
need to</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>write
up something to clarify this.</div>
    <div><br>
    </div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>The relationship with 6lowpan is fairly clear and ROLL and
6lowpan works in concert. The only ambiguity was for the routing
requirement ID in 6lowpan (which is about 6lowpan specific issue) for
which I hope I clarified the situation. With regards to MANET, this is
also fairly simple. Should we decide to use a routing protocol of the
MANET WG, we will be more than happy to work with MANET to provide the
requirements and get the protocol extensions worked out by the MANET
WG. It is that simple :-)</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>I still see
"Criteria" used, and I think that it's not the right term. "Evaluation
metrics" seems&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>a
much more appropriate term. I've argued why in my previous review, and
so I'll defer to&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>that
for details as to why -- but I REALLY do encourage changing the term.<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>I
can say the magic word ("please"), if it helps any ;)<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>There still
are a few inconsistencies as to if not attaining a "pass" on all the
evaluation&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>metrics
means that the protocol:</div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>cannot be
used<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>is not a
candidate at all<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>cannot be
used as-is, but may be modified to work<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Sections
1 (last paragraph), 3.2, 4.0 (2nd paragraph) send slightly different
messages as to&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>this.<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>This
ties in with another problem, that I just notice right now. Section 1
ends with:<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>"Whether
or not such a protocol involves modifications to an existing</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
protocol or a new protocol entirely is outside the scope of this</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
document: this document simply seeks to answer the question: do LLNs</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
require a new protocol specification document at all?"</div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Which
I can agree with, as such. However 3.2 reads:<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>"A
protocol that does not meet the criteria cannot be used as</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
specified, but it is possible that a protocol meets the criteria yet</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
is not able to meet the requirements of a particular application</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
domain.&nbsp; Nevertheless, a protocol that meets all of the criteria</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
would be very promising, and deserve a closer look and consideration</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
in light of LLN application domains."</div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>And
4.0:<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>"If
a protocol&nbsp;&nbsp;cannot meet even these minimalist criteria, then it cannot
be used</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
unchanged in several major ROLL application domains and so is</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>&nbsp;&nbsp;
unlikely to be a good candidate for use."</div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>The
offending bits here are the last sentence in the quote from 3.2, and
the&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>"is
unlikely to be a good candidate for use" from 4.<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Now,
1 states that the goal simply is to identify "can an existing protocol&nbsp;</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>specification
be used?".<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>3.2
and 4.0 state, essentially, that the document go both beyond and below
that,<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>by
admitting that "no, we cannot answer that, the evaluation metrics
presented&nbsp;<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>do
not allow answering this question completely" -- and "oh, the document
also<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>tries
to identify protocols that could be further developed/investigated".<br>
    </div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>In
other words, the document sets out to do one thing, then doesn't quite
do that,&nbsp;<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>but
does something else. While I am sure that that's not the intent, it
could be<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>read
as if the document essentially had as objective to "dismiss all related
IETF work"<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>--
and I'd really rather that we not be accused of that ;)<br>
    </div>
    <div><br>
    </div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>We will address these comments.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>Security<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>It
still troubles me a great deal that the "Security Considerations"
section is<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>intentionally
left blank. It strikes me that the different protocols discussed have<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>different
properties with respect to how they can be secured -- and that this</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>discussion
belongs in this document. If not, then I think the rationale as to why</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>this
document does not consider security MUST be included in the security</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>considerations
section.</div>
    <div><br>
    </div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Just because we looked at the (necessary) but not sufficient
criteria.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>Or,
if security simply is not at all important in ROLL networks, then
stating that</div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>as
reason for not discussing security would likely be enough?</div>
    <div>&nbsp;</div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Look at our charter, it is quite critical. But again, if a WG
does not pass the existing criteria this is enough to conclude.</div>
  <div><br>
  </div>
  <div>AGAIN, that does not mean that we will not use such a protocol
with extensions at all. The question is" can we use this</div>
  <div>protocol as-is" ?</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>o<span
 class="Apple-tab-span" style="white-space: pre;"> </span>I've made
some additional comments to the evaluation of OLSR as well, I encourage<br>
    </div>
    <div><span class="Apple-tab-span" style="white-space: pre;"> </span>that
these be considered.<br>
    </div>
    <div><br>
    </div>
    <div>I think that these high-level points are important to get
straightened out before moving this document forward. I see that others
have raised issues as well, I'll reply to those with my comments.</div>
    </div>
    </div>
  </blockquote>
  <div><br>
  </div>
  <div>Hope I clarified.</div>
  <div><br>
  </div>
  <div>Thanks.</div>
  <div><br>
  </div>
  <div>JP.</div>
  <br>
  <blockquote type="cite">
    <div style="">
    <div>
    <div><br>
    </div>
    <div>Cheers,</div>
    <div><br>
    </div>
    <div>Thomas</div>
    <div><br>
    </div>
    </div>
    <span>&lt;draft-ietf-roll-protocols-survey-04_review.pdf&gt;</span></div>
  </blockquote>
  </div>
  <br>
  </div>
</blockquote>
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Subject: Re: [Roll] Comments on draft-ietf-roll-building-routing-reqs-02.txt
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JP,=20

Sorry I missed you before your vacation started.  I am emailing it on=20
Friday as you requested, but I forgot until now you're already asleep.  So =

if for some ungodly reason you are reading this during your vacation=20
please immediately close this file and have fun!!!  I can assure you this=20
document will be just as boring to read when you return from vacation. :-)

I've made most changes as you requested, and noted why i didn't accept the =

comments in a few cases.  I will immediately embark on posting this=20
document as -03.  I have interlaced all the comments below and attached=20
the .doc file with 'change tracking' turned on so you can more readily=20
review the updates.

Regards,

Jerry







JP Vasseur <jvasseur@cisco.com>=20
01/20/2009 04:22 AM

To
Jerald.P.Martocci@jci.com, ROLL WG <roll@ietf.org>
cc
"David E. Culler" <culler@eecs.berkeley.edu>
Subject
Comments on draft-ietf-roll-building-routing-reqs-02.txt






Hi,

First of all thanks for the hard work and several revisions addressing=20
many comments. There are still several comments to address.

Please find below my WG LC comments:

1) Section 1

"For description of the terminology used in this specification, please=20
   see the Terminology ID referenced in Section 10.1. "
Please add the reference instead of mentioning Section 10.1.
s/"see the Terminology ID referenced in Section 10.1"/"see=20
[I-D.ietf-roll-terminology]"
done.


2) Section 2
Right after "Sensing devices may be battery or mains powered.  Actuators=20
and area=20
   controllers will be mains powered. "
Please add: "Still it is envisioned to see a mix of wired and wireless=20
sensors and actuators in buildings".
added as noted.




3) Section 2
"Facility Management Systems (FMS) are deployed in a large set of=20
   vertical markets including universities; hospitals; government=20
   facilities; Kindergarten through High School (K-12); pharmaceutical=20
   manufacturing facilities; and single-tenant or multi-tenant office=20
   buildings."
JP> Shouldn't you replace the ";" by "," ?
The nuns taught me that if you have compound items (i.e. 'single-tenant or =

multi-tenant)as members of a list, then you use semicolons to reduce=20
ambiguity.  I didn't change it, but am not willing to die on this=20
mountain.  Let me know if you want commas :-).

4) Section 2
Right after "The following sections describe the sensor, actuator, area=20
controller=20
   and zone controller layers of the topology.  (NOTE: The Building=20
   Controller and Enterprise layers of the FMS are excluded from this=20
   discussion since they typically deal in communication rates requiring=20
   WLAN communication technologies).  "
JP> Please add a note to mention that this material is provided mainly for =

educational purposes and the routing requirements are detailed in section=20
3.
JP> Then add "The aim of this document is to provide the set of IPv6=20
routing requirements for LLN in buildings".

Text added ...

Section 3 describes FMS architectures commonly installed in commercial=20
buildings.  Section 4 describes installation methods deployed for new and=20
remodeled construction.  Appendix B describes various FMS use-cases and=20
the interaction with humans for energy conservation and life-safety=20
applications.=20
Sections 3, 4, and Appendix B are mainly included for educational=20
purposes.  The aim of this document is to provide the set of IPv6 routing=20
requirements for LLNs in buildings as described in Section 5.


5) I would suggest a slightly different organization ...
* Leave the introduction (up to section 2.1 not included) and make the=20
suggested changes above,
done
* Rename section 2.1 (Facility Management System (FMS) Topology ) =3D>=20
Section 3
done.  I also converted Section 2.2 to Section 4 (Installation Methods) .
* Move the current Section 3 to Appendix B ("An example of building=20
automation: the art centre of Vooruit". As such it comes a bit out of the=20
blue.
done.=20


6) On Section 3 (to become appendix):
* s/""popcorn effect" draft"/"popcorn effect"
done
* There is no word on routing: could you provide some routing=20
characteristics in this network (number of hops, devices, ...) ?

The routing protocol is not a function of use case, but more a function of =

spacial device placement and network anomolies.  Rather than add routing=20
information in Appendix B, I have added the following two paragraphs to=20
the 'Traffic Pattern' section...

Initial system startup after a controlled outage or unexpected power=20
failure puts tremendous stress on the network and on the routing=20
algorithms.  An FMS system is comprised of a myriad of control algorithms=20
at the room, area, zone, and enterprise layers.  When these control=20
algorithms are at quiescence, the real-time data changes are small and the =

network will not saturate.  However, upon any power loss, the control=20
loops and real-time data quickly atrophy.  A ten minute outage may take=20
many hours to regain control.
Upon restart all lines-powered devices power-on instantaneously.  However=20
due to application startup and self tests, these devices will attempt to=20
join the network randomly.  Empirical testing indicates that routing paths =

acquired during startup will tend to be very oblique since the available=20
neighbor lists are incomplete.  This demands for an adaptive path protocol =

to allow for path optimization as the network stabilizes.
Comments on the routing requirements
################################

7) "It MUST be possible to fully commission network devices without=20
   requiring any additional commissioning device (e.g. laptop). The=20
   device MAY support up to sixteen integrated switches to uniquely=20
   identify the device on the network. "
JP> How does the "MAY" translate to routing requirements ?

It's really a commissioning constraint.  The document notes 'zero=20
commissioning' time.  This requirement further states that the sensor=20
cannot afford the expense of commissioning beyond that of setting a switch =

bank. (This gets back to the abilities of an electrician and the cost and=20
size of adding too many switches).


8) Please reword "Routing=20
   MUST recognize the constraints associated the power budget of such=20
   low duty cycle devices."
The routing protocol MUST take into account device characteristics such as =

"power budget".
Done.


9) "If the mechanisms for duty cycling dictate very long response times or =

specific temporal=20
   scheduling, routing and forwarding will need to take such constraints=20
   into account. "
JP> Please remove "forwarding"
Done.


10) "Communication to these mostly sleeping devices MUST be=20
bidirectional."
JP> Please be more specific. Do you mean by the routing protocol MUST be=20
able to compute bi-directional route to sleeping devices ? Why ?
Yes and No.  You're actually asking two questions in your question...=20

With regard to sleeping devices, the routing protocol must allow for=20
delivering messages to an assigned (awake) proxy device who will later=20
transmit the information to the sleeping device upon its awaking.  I've=20
actually addressed this as a separate requirement.

With regard to bidirectionality, I am simply saying that sensors must be=20
able to receive application ACKs and other configuration data from its=20
controller.  Some protocols (such as EnOcean) support only unidirectional=20
messaging from the sensor to the controller.  This might work for a=20
lightweight application such as a wireless light switch turning on a=20
light, but will not work for most of the commercial applications where the =

sensor must know that the packet has been successfully transmitted to the=20
controller (say in a Fire application).

I've changed the text to read ...

Communication to  sleeping devices MUST be bidirectional to allow for=20
guaranteed packet delivery from the sensor to the controller.  =20

11) "In such cases, routing MUST recognize the selected proxy=20
   for the sleeping device. "
JP> "recognize" in which way ? Can you be more specific ?
This is actually an implementation issue which arguably may not be the=20
province of the routing protocol.  As I just mentioned above, sleeping=20
devices must have a mechanism to receive packets.  However since they=20
sleep the vast majority of the time, they will need a proxy device to hold =

the packet until the next awake cycle.  The question is which layer must=20
be cognizant of the proxy device.  The APP layer could do it, but it would =

need to constantly be checking to see if the proxy device has changed.  I=20
would prefer that the routing layer recognize that the destination address =

is for a sleeping device and reroute the packet to its assigned proxy with =

forwarding information added to its sleeping device.

The text now reads ...

In such cases, the routing protocol MUST recognize the assigned proxy for=20
the sleeping device; deliver the packet to the assigned proxy for later=20
delivery to the sleeping device upon its next awake cycle.

12) "Routing must allow for temporary ad hoc paths to be=20
   established that are updated as the network physically and=20
   functionally expands. "
JP> This can be a very stringent requirements (although there is no=20
normative language).=20

This is more an implementation item.  Here the idea is that when=20
performing initial room level testing, there needs to be some simple=20
network that can be formed to verify local operation (not unlike 802.11 Ad =

Hoc mode or 802.3 crossover cable).  I actually don't want to foist=20
normative language onto the implementers.  I changed the 'must' to=20
'should' in the text.

13) Section 4.1.4: not a routing requirements

I disagree.  Device replacement must have zero configuration and=20
immediately join the network as does a new device.  The installer can't=20
wait around for a 1/2 hour until the ARP tables flush and the new MAC=20
address be recognized.  Because the new device will necessarily have a new =

MAC, the routing protocol will somehow have to deal with routing without=20
using MAC addressing.  To me, the text as drafted is clear in this regard. =

 Let me know if I need more clarity to better express my point.


14) Section 4.2
"The routing protocol MUST be able to support networks with at least=20
   1000 routers and 1000 hosts. "
If a host is not "routing" no need to mention the number of hosts. What=20
matters in this section is the number of routers in the LLN. Same comments =

for the number of sensors.

I think we have a nomenclature issue here.  What I am trying to say is=20
that a network (PAN) needs to support at least 1000 powered application=20
devices that can also act as routers.  The PAN must additionally support=20
1000 sleeping devices which typically have no routing capability.  I would =

think all 2000 of these devices would be termed 'hosts' in the IT=20
parlance.  I am in no way thinking that there are application hosts that=20
don't route and then traditional standalone routers in the WPAN.  The=20
routing protocol needs to be software that resides within the application=20
device.

I changed the nomenclature to reference 'hosts' and 'routers' at David's=20
request on the last version.  I probably bolixed it up!!!  Please help me=20
draft this requirement so it's clear for the IETF reader.

I changed the text to read ...

The routing protocol MUST be able to support networks with at least 2000=20
nodes supporting at least 1000 routing devices and 1000 nonrouting device. =

=20

15) Section 4.3
"Mobile devices SHOULD be capable of unjoining (handing-off) from an=20
   old network joining onto a new network within 15 seconds.=20

"
JP> You may want to elaborate a little bit on hat you mean by "unjoining". =

Does that mean that the routing protocol must converge within 15s after=20
the removal of the device ?



16) "The routing mechanisms MUST=20
   therefore be tailored to fit these resource constrained devices.  "
JP> This is certainly true but how does this translate to a routing=20
requirement ? 10000 times less memory than a several GBytes routers ?=20
Since you provide number hereafter, please delete this sentence.

Section 5.4 is a brief introduction of the section upon which the=20
requirements are then stated in Sections 5.4.1 and 5.4.2.  I agree that I=20
should not therefore be putting normative requirements in the introductory =

section.  What I did is change the 'MUST' to a 'must' thereby making the=20
intro only informative.


17) In Sections 4.4.1 and 4.4.2, what do you mean by "software stack":=20
OS+entire protocol stack ?
Yes, the entire operating environment other than the end-application.   I=20
changed these paragraphs to read ...

5.4.1.  Limited Processing Power for Non-routing Devices.
The software size requirement for non-routing devices (e.g. sensors and=20
actuators) MUST be implementable in 8-bit devices with no more than 128KB=20
of flash memory (including at least 32KB for the application code) and no=20
more than 8KB of RAM (including at least 1KB RAM available for the=20
application).=20
5.4.2.  Limited Processing Power for Routing Devices
The software size requirements for routing devices (e.g. room controllers) =

SHOULD be implementable in 8-bit devices with no more than 256KB of flash=20
memory (including at least 32KB for the application code) and no more than =

8KB of RAM (including at least 1KB RAM available for the application).

18) "Routing MUST support anycast, unicast, multicast and broadcast=20
   services (or IPv6 equivalent). "
JP> This must be changed ... there is no broadcast in IPv6 (and we are=20
exclusively working on IPv6) but IPv6 is using multicast (RFC2373). Just=20
remove "broadcast".
done.   I presume that there is a form of multicast that will deliver a=20
discovery packet to every node on the subnetwork.  BACnet requires a=20
network wide broadcast to discover nodes and objects anywhere on the=20
internetwork.  It has intrinsic support for unicasting across subnetworks.

19) "4.6.1. Firmware Upgrades=20

   To support high speed code downloads, routing MUST support transports=20
   that provide parallel downloads to targeted devices yet guarantee=20
   packet delivery. "
JP> This is clearly a device requirement not a routing requirements. I=20
would suggest to delete.

I'm not willing to give in on this one.  I agree that as stated this is=20
more of an implementation approach (i.e. how to do it) rather than a=20
requirement (i.e. what needs to be done).  The point I am trying to make=20
is that firmware upgrades must be very fast to not lose building control.  =

This has been implemented by supporting QoS and a special version of=20
multicast (end of transmission ACKs) that allows all devices to be=20
downloaded in parallel yet guarantee delivery.


20) "4.6.2. Diagnostics=20

   To improve diagnostics, the network layer SHOULD be able to be placed=20
   in and out of 'verbose' mode.  Verbose mode is a temporary debugging=20
   mode that provides additional communication information including at=20
   least total number of packets sent, packets received, number of=20
   failed communication attempts, neighbor table and routing table=20
   entries. "
JP> This is an important requirement. Please just keep the routing=20
aspects.
Not sure if you're asking for some deletion. no change to text.



21) "4.6.3. Route Tracking=20

   Route diagnostics SHOULD be supported providing information such as=20
   path quality; number of hops; available alternate active paths with=20
   associated costs. "
JP> Please define "path quality".

Whatever means we employ to select one path over other paths.  In=20
debugging, it's sometime unclear why one path is selected in lieu of other =

paths.  This info should be available.

I added the sentence...

Path quality is the relative measure of ?goodness? of the selected source=20
to destination path as compared to alternate paths.  This  composite value =

may be measured as a function of hop count, signal strength, available=20
power, existing active paths or any other criteria deemed by ROLL as the=20
path cost differentiator.

22) Section 4.7
JP> I understand your concern but this is not a routing requirement=20
either. The IETF specifies IP-based protocol and cannot depend on non-IP=20
protocols. I would suggest to remove that section.
BACnet is an application protocol that sits atop of UDP.  Hence it is an=20
IP protocol!!!.   To me, this is no different than assuring that=20
ROLL/6LoWPAN supports FTP.=20
I don't know if LON has intrinsic IP support.  I will drop the LON=20
requirement.  The text now reads ...

The building automation industry adheres to BACnet, a UDP/IP application=20
layer protocol, to achieve vendor interoperability.  It is estimated that=20
fully 80% of customer bid requests received world-wide will require=20
compliance to this ISO standard within five years.  ROLL routing SHOULD=20
support this application protocol to assure acceptance in the building=20
automation industry. =20


23) Section 4.7.1
Per our charter, we exclusively focus on IPv6. Furthermore, the term=20
intercommunication is ambiguous. I would suggest to delete 4.7.1
I  moved this requirement to Appendix A as being out of scope for ROLL.=20
However, the FMS industry has been installing IPv4 devices into buildings=20
for at least 10 years.  These devices have a lifetime of at least 25 years =

and will need to communicate to newer devices.  If we (the IETF) don't=20
provide a seamless interface across IPv4 and IPv6 we can expect little=20
interest in this market.

24) Section 4.7.2
"Routing MUST support packet sizes to 1526 octets (to be backwards=20
   compatible with 802.3 subnetworks) "
JP> Please remove the text in parenthesis. Strictly speaking the ROLL=20
protocol(s) will not be backward compatible with 802.3.
Done.

25) "Route discovery occurring during packet=20
   transmission MUST not exceed 120 msecs."
JP> I would suggest to slightly reword since it gives the impression that=20
you mandate a reactive routing mechanism.
I tried to clarify the need and changed the MUST to SHOULD.  It now reads=20
...

Route discovery occurring during packet transmission SHOULD not add more=20
than 120 msecs latency to the packet mean delivery time.


26) "4.8.5. Route Preference=20

   The route discovery mechanism SHOULD allow a source node (sensor) to=20
   dictate a configured destination node (controller) as a preferred=20
   routing path. "
JP> mmm ... what do you mean by "dictate a configured destination node as=20
a preferred path ?". Do you mean that the routing protocol SHOULD allow=20
for routing along a configured path on the source ?
The word 'dictate' is probably too strong.  Maybe 'suggest' would be=20
better.  What I'm trying to note is that many FMS applications have=20
apriori knowledge of the spatial placement of the client and server=20
devices.  Yet the 'route cost' algorithms don't  account for this=20
knowledge in the costing algorithm calculations.  As an example, a room=20
temperature sensor and its associated room controller are always within=20
point-to-point distance.  Yet empirical data shows that many times the=20
path will have additional hops.  The added latency of a couple additional=20
hops isn't at issue.  It's just the extra load on the network to hop=20
across extraneous devices.

I changed the text to read ...

Route cost algorithms SHOULD allow the installer to optionally select=20
'preferred' paths based on the known spatial layout of the communicating=20
devices.

27) "4.8.6. Path Persistence=20

   To eliminate high network traffic in power-fail or brown-out=20
   conditions previously established routes SHOULD be remembered and=20
   invoked prior to establishing new routes for those devices reentering=20
   the network. "
JP> This is a device / implementation-specific choice. Should be removed.
I disagree.  We're dealing with a LLNs that can ill-afford to have=20
hundreds of nodes simultaneously purge their neighbor lists and routing=20
tables just because of a 1 second brownout!  I think at some point the=20
IETF has to take into account that LLNs are very limited data highways and =

mandate certain operational modes.


28) Please remove Section 6
Hmmm,  little confused here since prior comments changed the section=20
numbers.  I am assuming this comment references the 'Open Issues' section. =

 I've deleted that section.=20


29) Security.
JP> Don't you have any security requirements ? Could you please look at:
http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-reqs-03.t=
xt
http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-reqs-03.t=
xt
http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routing-reqs-06.txt
to see if you do not have security requirements along those lines ?

Yes.  My first draft had 10 pages of security requirements!  However, we=20
deemed them out of scope since these requirements do not affect routing.=20
What we seemed to agree to in the email exchanges is that a node must be=20
trusted (and possibly authenticated) upon joining the network, but once a=20
trusted node joins the network, it can move packets across the network=20
unimpeded by security concerns.

The text now reads ...

7.      Security Considerations
Security policies, especially wireless encryption and device=20
authentication needs to be considered, especially with concern to the=20
impact on the processing capabilities and additional latency incurred on=20
the sensors, actuators and controllers.
FMS systems are typically highly configurable in the field and hence the=20
security policy is most often dictated by the type of building to which=20
the FMS is being installed.   Single tenant owner occupied office=20
buildings installing lighting or HVAC control are candidates for=20
implementing low or even no security on the LLN.  Antithetically, military =

or pharmaceutical facilities require strong security policies.  As noted=20
in the installation procedures above, security policies must be facile to=20
allow no security during the installation phase (prior to building=20
occupancy), yet easily raise the security level network wide during the=20
commissioning phase of the system.
7.1.    Security Requirements
7.1.1.  Authentication
Authentication MUST be optional on the LLN.  Authentication MUST be fully=20
configurable on-site. Authentication policy and updates MUST be=20
transmittable over-the-air.  Authentication MUST occur upon joining or=20
rejoining a network.  However, once authenticated devices SHOULD not need=20
to reauthenticate themselves with any other devices in the LLN.
7.1.2.  Encryption
7.1.2.1.        Encryption Levels
Encryption MUST be optional on the LLN.  Encryption MUST be fully=20
configurable on-site.  Encryption policy and updates MUST be transmittable =

over-the-air and in-the-clear.=20
7.1.2.2.        Security Policy Flexibility
In most facilities authentication and encryption will be turned off during =

installation.=20
More complex encryption policies might be put in force at commissioning=20
time.  New encryption policies MUST be allowed to be presented to all=20
devices in the LLN over the network without needing to visit each device.
7.1.2.3.        Encryption Types
Data encryption of packets MUST optionally be supported by use of either a =

network wide key and/or application key.    The network key would apply to =

all devices in the LLN.  The application key would apply to a subset of=20
devices on the LLN.=20
The network key and application keys would be mutually exclusive.=20
Forwarding devices in the mesh MUST be able to forward a packet encrypted=20
with an application key without needing to have the application key.
7.1.2.4.        Packet Encryption=20
The encryption policy MUST support encryption of the payload only or the=20
entire packet.  Payload only encryption would eliminate the=20
decryption/re-encryption overhead at every hop.
7.1.3.  Disparate Security Policies
Due to the limited resources of an LLN, the security policy defined within =

the LLN MUST be able to differ from that of the rest of the IP network=20
within the facility yet packets MUST still be able to route to or through=20
the LLN from/to these networks.



30) Please remove (see comments number 32 below)
    See Appendix A for additional requirements=20
   that have been deemed outside the scope of this document yet will=20
   pertain to the successful deployment of building automation systems.=20
See below

31) References

Please reformat the references section to list the relevant details of=20
each document + add a normative reference to RFC 2119.
Done.

For example:

10.  References

10.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

10.2.  Informative References

   [I-D.ietf-roll-home-routing-reqs]
              Brandt, A., Buron, J., and G. Porcu, "Home Automation
              Routing Requirements in Low Power and Lossy Networks",
              draft-ietf-roll-home-routing-reqs-06 (work in progress),
              November 2008.

32) Appendix A
The requirements will need to=20
   be addressed by ROLL or other WGs before adoption by the building=20
   automation industry will be considered.=20
JP> Please remove, since ROLL is about routing, thus we will not be=20
chartered to address non routing requirements.
Giving more thoughts, this appendix does provide very useful and well=20
documented data. That being said, they do not really belong to this=20
document and may introduce confusion. I would suggest to remove this=20
appendix from the document.

In my mind the requirements noted in  Appendix A are as important to the=20
successful deployment of IP wireless sensor networks than most of those=20
still in the body of the document.  It's only because of the=20
compartmentalized nature of the IETF that you feel they are out of scope.=20
I think it's very important that we continue to look at the requirement=20
set holistically even if our current mission is more tightly focused.  I=20
would like to leave Appendix A included in this document.

=20


Thanks.

JP.


Begin forwarded message:

From: Internet-Drafts@ietf.org
Date: January 15, 2009 12:00:02 AM CEST
To: i-d-announce@ietf.org
Cc: roll@ietf.org
Subject: [Roll] I-D Action:draft-ietf-roll-building-routing-reqs-02.txt

A New Internet-Draft is available from the on-line Internet-Drafts=20
directories.
This draft is a work item of the Routing Over Low power and Lossy networks =

Working Group of the IETF.


Title           : Building Automation Routing Requirements in Low Power=20
and Lossy Networks
Author(s)       : J. Martocci, et al.
Filename        : draft-ietf-roll-building-routing-reqs-02.txt
Pages           : 27
Date            : 2009-01-14

The Routing Over Low power and Lossy network (ROLL) Working Group has=20
been chartered to work on routing solutions for Low Power and Lossy=20
networks (LLN) in various markets: Industrial, Commercial (Building),=20
Home and Urban. Pursuant to this effort, this document defines the=20
routing requirements for building automation.=20

Requirements Language=20

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",=20
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this=20
document are to be interpreted as described in RFC-2119.

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<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b>JP, </b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b>Sorry I missed you b=
efore
your vacation started. &nbsp;I am emailing it on Friday as you requested,
but I forgot until now you're already asleep. &nbsp;So if for some ungodly
reason you are reading this during your vacation please immediately close
this file and have fun!!! &nbsp;I can assure you this document will be
just as boring to read when you return from vacation. :-)</b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b>I've made most chang=
es
as you requested, and noted why i didn't accept the comments in a few cases.
&nbsp;I will immediately embark on posting this document as -03. &nbsp;I
have interlaced all the comments below and attached the .doc file with
'change tracking' turned on so you can more readily review the updates.</b>=
</font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b>Regards,</b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b>Jerry</b></font>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<table width=3D100%>
<tr valign=3Dtop>
<td width=3D40%><font size=3D1 face=3D"sans-serif"><b>JP Vasseur &lt;jvasse=
ur@cisco.com&gt;</b>
</font>
<p><font size=3D1 face=3D"sans-serif">01/20/2009 04:22 AM</font>
<td width=3D59%>
<table width=3D100%>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">To</font></div>
<td><font size=3D1 face=3D"sans-serif">Jerald.P.Martocci@jci.com, ROLL WG &=
lt;roll@ietf.org&gt;</font>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">cc</font></div>
<td><font size=3D1 face=3D"sans-serif">&quot;David E. Culler&quot; &lt;cull=
er@eecs.berkeley.edu&gt;</font>
<tr valign=3Dtop>
<td>
<div align=3Dright><font size=3D1 face=3D"sans-serif">Subject</font></div>
<td><font size=3D1 face=3D"sans-serif">Comments on draft-ietf-roll-building=
-routing-reqs-02.txt</font></table>
<br>
<table>
<tr valign=3Dtop>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=3D3>Hi,</font>
<br>
<br><font size=3D3>First of all thanks for the hard work and several revisi=
ons
addressing many comments. There are still several comments to address.</fon=
t>
<br>
<br><font size=3D3>Please find below my WG LC comments:</font>
<br>
<br><font size=3D3>1) Section 1</font>
<br>
<br><font size=3D3>&quot;For description of the terminology used in this
specification, please </font>
<br><font size=3D2><tt>&nbsp; &nbsp;see the Terminology ID referenced in
Section 10.1. &quot;</tt></font>
<br><font size=3D2><tt>Please add the reference instead of mentioning Secti=
on
10.1.</tt></font>
<br><font size=3D2><tt>s/&quot;see the Terminology ID referenced in Section
10.1&quot;/&quot;see [I-D.ietf-roll-terminology]&quot;</tt></font>
<br><font size=3D2 color=3Dblue><tt><b><i>done.</i></b></tt></font>
<br>
<br>
<br><font size=3D2><tt>2) Section 2</tt></font>
<br><font size=3D2><tt>Right after &quot;Sensing devices may be battery or
mains powered. &nbsp;Actuators and area </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;controllers will be mains powered. &quo=
t;</tt></font>
<br><font size=3D2><tt>Please add: &quot;Still it is envisioned to see a
mix of wired and wireless sensors and actuators in buildings&quot;.</tt></f=
ont>
<br><font size=3D2 color=3Dblue><tt><b><i>added as noted.</i></b></tt></fon=
t>
<br>
<br>
<br>
<br>
<br><font size=3D2><tt>3) Section 2</tt></font>
<br><font size=3D2><tt>&quot;Facility Management Systems (FMS) are deployed
in a large set of </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;vertical markets including universities;
hospitals; government <br>
 &nbsp; facilities; Kindergarten through High School (K-12); pharmaceutical
<br>
 &nbsp; manufacturing facilities; and single-tenant or multi-tenant office
<br>
 &nbsp; buildings.&quot;</tt></font>
<br><font size=3D2><tt>JP&gt; Shouldn't you replace the &quot;;&quot; by
&quot;,&quot; ?</tt></font>
<br><font size=3D2 color=3Dblue><tt><b><i>The nuns taught me that if you ha=
ve
compound items (i.e. 'single-tenant or multi-tenant)as members of a list,
then you use semicolons to reduce ambiguity. &nbsp;I didn't change it,
but am not willing to die on this mountain. &nbsp;Let me know if you want
commas :-).</i></b></tt></font>
<br>
<br><font size=3D2><tt>4) Section 2</tt></font>
<br><font size=3D2><tt>Right after &quot;The following sections describe
the sensor, actuator, area controller </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;and zone controller layers of the topol=
ogy.
&nbsp;(NOTE: The Building <br>
 &nbsp; Controller and Enterprise layers of the FMS are excluded from this
<br>
 &nbsp; discussion since they typically deal in communication rates requiri=
ng
<br>
 &nbsp; WLAN communication technologies). &nbsp;&quot;</tt></font>
<br><font size=3D2><tt>JP&gt; Please add a note to mention that this materi=
al
is provided mainly for educational purposes and the routing requirements
are detailed in section 3.</tt></font>
<br><font size=3D2><tt>JP&gt; Then add &quot;The aim of this document is
to provide the set of IPv6 routing requirements for LLN in buildings&quot;.=
</tt></font>
<br>
<br><font size=3D2 color=3Dblue><tt><b><i>Text added ...</i></b></tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Section 3 descri=
bes
FMS architectures commonly installed in commercial buildings. &nbsp;Section
4 describes installation methods deployed for new and remodeled constructio=
n.
&nbsp;Appendix B describes various FMS use-cases and the interaction with
humans for energy conservation and life-safety applications. &nbsp;</i></b>=
</font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Sections 3, 4, and
Appendix B are mainly included for educational purposes. &nbsp;The aim
of this document is to provide the set of IPv6 routing requirements for
LLNs in buildings as described in Section 5.</i></b></font>
<p>
<br>
<br><font size=3D3>5) I would suggest a slightly different organization ...=
</font>
<br><font size=3D3>* Leave the introduction (up to section 2.1 not included)
and make the suggested changes above,</font>
<br><font size=3D2 color=3Dblue><b><i>done</i></b></font>
<br><font size=3D3>* Rename section 2.1 (Facility Management System (FMS)
Topology ) =3D&gt; Section 3</font>
<br><font size=3D2 color=3Dblue><b><i>done. &nbsp;I also converted Section
2.2 to Section 4 (Installation Methods) .</i></b></font>
<br><font size=3D3>* Move the current Section 3 to Appendix B (&quot;An exa=
mple
of building automation: the art centre of Vooruit&quot;. As such it comes
a bit out of the blue.</font>
<br><font size=3D2 color=3Dblue><b><i>done. &nbsp;</i></b></font>
<br>
<br>
<br><font size=3D3>6) On Section 3 (to become appendix):</font>
<br><font size=3D3>* s/&quot;&quot;popcorn effect&quot; draft&quot;/&quot;p=
opcorn
effect&quot;</font>
<br><font size=3D2 color=3Dblue><b><i>done</i></b></font>
<br><font size=3D3>* There is no word on routing: could you provide some
routing characteristics in this network (number of hops, devices, ...)
?</font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The routing proto=
col
is not a function of use case, but more a function of spacial device placem=
ent
and network anomolies. &nbsp;Rather than add routing information in Appendix
B, I have added the following two paragraphs to the 'Traffic Pattern' secti=
on...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Initial system st=
artup
after a controlled outage or unexpected power failure puts tremendous stress
on the network and on the routing algorithms. &nbsp;An FMS system is compri=
sed
of a myriad of control algorithms at the room, area, zone, and enterprise
layers. &nbsp;When these control algorithms are at quiescence, the real-time
data changes are small and the network will not saturate. &nbsp;However,
upon any power loss, the control loops and real-time data quickly atrophy.
&nbsp;A ten minute outage may take many hours to regain control.</i></b></f=
ont>
<p><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Upon restart all l=
ines-powered
devices power-on instantaneously. &nbsp;However due to application startup
and self tests, these devices will attempt to join the network randomly.
&nbsp;Empirical testing indicates that routing paths acquired during startup
will tend to be very oblique since the available neighbor lists are incompl=
ete.
&nbsp;This demands for an adaptive path protocol to allow for path optimiza=
tion
as the network stabilizes.</i></b></font>
<p><font size=3D3>Comments on the routing requirements</font>
<br><font size=3D3>################################</font>
<br>
<br><font size=3D3>7) &quot;It MUST be possible to fully commission network
devices without </font>
<br><font size=3D2><tt>&nbsp; &nbsp;requiring any additional commissioning
device (e.g. laptop). The <br>
 &nbsp; device MAY support up to sixteen integrated switches to uniquely
<br>
 &nbsp; identify the device on the network. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; How does the &quot;MAY&quot; translate to rou=
ting
requirements ?</tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>It's really a com=
missioning
constraint. &nbsp;The document notes 'zero commissioning' time. &nbsp;This
requirement further states that the sensor cannot afford the expense of
commissioning beyond that of setting a switch bank. (This gets back to
the abilities of an electrician and the cost and size of adding too many
switches).</i></b></font>
<br>
<br>
<br><font size=3D2><tt>8) Please reword &quot;Routing </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;MUST recognize the constraints associat=
ed
the power budget of such <br>
 &nbsp; low duty cycle devices.&quot;</tt></font>
<br><font size=3D2><tt>The routing protocol MUST take into account device
characteristics such as &quot;power budget&quot;.</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Done.</i></b></fo=
nt>
<br>
<br>
<br><font size=3D2><tt>9) &quot;If the mechanisms for duty cycling dictate
very long response times or specific temporal </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;scheduling, routing and forwarding will
need to take such constraints <br>
 &nbsp; into account. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; Please remove &quot;forwarding&quot;</tt></fo=
nt>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Done.</i></b></fo=
nt>
<br>
<br>
<br><font size=3D2><tt>10) &quot;Communication to these mostly sleeping dev=
ices
MUST be bidirectional.&quot;</tt></font>
<br><font size=3D2><tt>JP&gt; Please be more specific. Do you mean by the
routing protocol MUST be able to compute bi-directional route to sleeping
devices ? Why ?</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Yes and No. &nbsp=
;You're
actually asking two questions in your question... &nbsp;</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>With regard to sl=
eeping
devices, the routing protocol must allow for delivering messages to an
assigned (awake) proxy device who will later transmit the information to
the sleeping device upon its awaking. &nbsp;I've actually addressed this
as a separate requirement.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>With regard to bi=
directionality,
I am simply saying that sensors must be able to receive application ACKs
and other configuration data from its controller. &nbsp;Some protocols
(such as EnOcean) support only unidirectional messaging from the sensor
to the controller. &nbsp;This might work for a lightweight application
such as a wireless light switch turning on a light, but will not work for
most of the commercial applications where the sensor must know that the
packet has been successfully transmitted to the controller (say in a Fire
application).</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I've changed the =
text
to read ...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Communication to =
&nbsp;sleeping
devices MUST be bidirectional to allow for guaranteed packet delivery from
the sensor to the controller. </i></b></font><font size=3D3 face=3D"Courier=
 New">&nbsp;</font><font size=3D2><tt>
&nbsp;</tt></font>
<br>
<br><font size=3D2><tt>11) &quot;In such cases, routing MUST recognize the
selected proxy </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;for the sleeping device. &quot;</tt></f=
ont>
<br><font size=3D2><tt>JP&gt; &quot;recognize&quot; in which way ? Can you
be more specific ?</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>This is actually =
an
implementation issue which arguably may not be the province of the routing
protocol. &nbsp;As I just mentioned above, sleeping devices must have a
mechanism to receive packets. &nbsp;However since they sleep the vast major=
ity
of the time, they will need a proxy device to hold the packet until the
next awake cycle. &nbsp;The question is which layer must be cognizant of
the proxy device. &nbsp;The APP layer could do it, but it would need to
constantly be checking to see if the proxy device has changed. &nbsp;I
would prefer that the routing layer recognize that the destination address
is for a sleeping device and reroute the packet to its assigned proxy with
forwarding information added to its sleeping device.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The text now reads
...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>In such cases, the
routing protocol MUST recognize the assigned proxy for the sleeping device;
deliver the packet to the assigned proxy for later delivery to the sleeping
device upon its next awake cycle.</i></b></font>
<p>
<br><font size=3D2><tt>12) &quot;Routing must allow for temporary ad hoc
paths to be </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;established that are updated as the net=
work
physically and <br>
 &nbsp; functionally expands. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; This can be a very stringent requirements (al=
though
there is no normative language). </tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>This is more an i=
mplementation
item. &nbsp;Here the idea is that when performing initial room level testin=
g,
there needs to be some simple network that can be formed to verify local
operation (not unlike 802.11 Ad Hoc mode or 802.3 crossover cable). &nbsp;I
actually don't want to foist normative language onto the implementers.
&nbsp;I changed the 'must' to 'should' in the text.</i></b></font>
<br>
<br><font size=3D2><tt>13) Section 4.1.4: not a routing requirements</tt></=
font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I disagree. &nbsp=
;Device
replacement must have zero configuration and immediately join the network
as does a new device. &nbsp;The installer can't wait around for a 1/2 hour
until the ARP tables flush and the new MAC address be recognized. &nbsp;Bec=
ause
the new device will necessarily have a new MAC, the routing protocol will
somehow have to deal with routing without using MAC addressing. &nbsp;To
me, the text as drafted is clear in this regard. &nbsp;Let me know if I
need more clarity to better express my point.</i></b></font>
<br>
<br>
<br><font size=3D2><tt>14) Section 4.2</tt></font>
<br><font size=3D2><tt>&quot;The routing protocol MUST be able to support
networks with at least </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;1000 routers and 1000 hosts. &quot;</tt=
></font>
<br><font size=3D2><tt>If a host is not &quot;routing&quot; no need to ment=
ion
the number of hosts. What matters in this section is the number of routers
in the LLN. Same comments for the number of sensors.</tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I think we have a=
 nomenclature
issue here. &nbsp;What I am trying to say is that a network (PAN) needs
to support at least 1000 powered application devices that can also act
as routers. &nbsp;The PAN must additionally support 1000 sleeping devices
which typically have no routing capability. &nbsp;I would think all 2000
of these devices would be termed 'hosts' in the IT parlance. &nbsp;I am
in no way thinking that there are application hosts that don't route and
then traditional standalone routers in the WPAN. &nbsp;The routing protocol
needs to be software that resides within the application device.</i></b></f=
ont>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I changed the nom=
enclature
to reference 'hosts' and 'routers' at David's request on the last version.
&nbsp;I probably bolixed it up!!! &nbsp;Please help me draft this requireme=
nt
so it's clear for the IETF reader.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I changed the text
to read ...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The routing proto=
col
MUST be able to support networks with at least 2000 nodes supporting at
least 1000 routing devices and 1000 nonrouting device. &nbsp;</i></b></font>
<br>
<br><font size=3D2><tt>15) Section 4.3</tt></font>
<br><font size=3D2><tt>&quot;Mobile devices SHOULD be capable of unjoining
(handing-off) from an </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;old network joining onto a new network
within 15 seconds. <br>
</tt></font>
<br><font size=3D3>&quot;</font>
<br><font size=3D3>JP&gt; You may want to elaborate a little bit on hat you
mean by &quot;unjoining&quot;. Does that mean that the routing protocol
must converge within 15s after the removal of the device ?</font>
<br>
<br>
<br>
<br><font size=3D3>16) &quot;The routing mechanisms MUST </font>
<br><font size=3D2><tt>&nbsp; &nbsp;therefore be tailored to fit these reso=
urce
constrained devices. &nbsp;&quot;</tt></font>
<br><font size=3D2><tt>JP&gt; This is certainly true but how does this tran=
slate
to a routing requirement ? 10000 times less memory than a several GBytes
routers ? Since you provide number hereafter, please delete this sentence.<=
/tt></font>
<br>
<br><font size=3D2 color=3Dblue><b><i>Section 5.4 is a brief introduction of
the section upon which the requirements are then stated in Sections 5.4.1
and 5.4.2. &nbsp;I agree that I should not therefore be putting normative
requirements in the introductory section. &nbsp;What I did is change the
'MUST' to a 'must' thereby making the intro only informative.</i></b></font>
<br>
<br>
<br><font size=3D2><tt>17) In Sections 4.4.1 and 4.4.2, what do you mean
by &quot;software stack&quot;: OS+entire protocol stack ?</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Yes, the entire o=
perating
environment other than the end-application. &nbsp; I changed these paragrap=
hs
to read ...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>5.4.1. &nbsp; &nb=
sp;
&nbsp; &nbsp; Limited Processing Power for Non-routing Devices.</i></b></fo=
nt>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The software size=
 requirement
for non-routing devices (e.g. sensors and actuators) MUST be implementable
in 8-bit devices with no more than 128KB of flash memory (including at
least 32KB for the application code) and no more than 8KB of RAM (including
at least 1KB RAM available for the application). &nbsp;</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>5.4.2. &nbsp; &nbs=
p;
&nbsp; &nbsp; Limited Processing Power for Routing Devices</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The software size=
 requirements
for routing devices (e.g. room controllers) SHOULD be implementable in
8-bit devices with no more than 256KB of flash memory (including at least
32KB for the application code) and no more than 8KB of RAM (including at
least 1KB RAM available for the application).</i></b></font>
<p>
<br><font size=3D2><tt>18) &quot;Routing MUST support anycast, unicast, mul=
ticast
and broadcast </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;services (or IPv6 equivalent). &quot;</=
tt></font>
<br><font size=3D2><tt>JP&gt; This must be changed ... there is no broadcast
in IPv6 (and we are exclusively working on IPv6) but IPv6 is using multicast
(RFC2373). Just remove &quot;broadcast&quot;.</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>done. &nbsp; I pr=
esume
that there is a form of multicast that will deliver a discovery packet
to every node on the subnetwork. &nbsp;BACnet requires a network wide broad=
cast
to discover nodes and objects anywhere on the internetwork. &nbsp;It has
intrinsic support for unicasting across subnetworks.</i></b></font>
<br>
<br><font size=3D2><tt>19) &quot;4.6.1. Firmware Upgrades </tt></font>
<br><font size=3D2><tt><br>
 &nbsp; To support high speed code downloads, routing MUST support transpor=
ts
<br>
 &nbsp; that provide parallel downloads to targeted devices yet guarantee
<br>
 &nbsp; packet delivery. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; This is clearly a device requirement not a
routing requirements. I would suggest to delete.</tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I'm not willing to
give in on this one. &nbsp;I agree that as stated this is more of an implem=
entation
approach (i.e. how to do it) rather than a requirement (i.e. what needs
to be done). &nbsp;The point I am trying to make is that firmware upgrades
must be very fast to not lose building control. &nbsp; This has been implem=
ented
by supporting QoS and a special version of multicast (end of transmission
ACKs) that allows all devices to be downloaded in parallel yet guarantee
delivery.</i></b></font>
<br>
<br>
<br><font size=3D2><tt>20) &quot;4.6.2. Diagnostics </tt></font>
<br><font size=3D2><tt><br>
 &nbsp; To improve diagnostics, the network layer SHOULD be able to be
placed <br>
 &nbsp; in and out of 'verbose' mode. &nbsp;Verbose mode is a temporary
debugging <br>
 &nbsp; mode that provides additional communication information including
at <br>
 &nbsp; least total number of packets sent, packets received, number of
<br>
 &nbsp; failed communication attempts, neighbor table and routing table
<br>
 &nbsp; entries. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; This is an important requirement. Please just
keep the routing aspects.</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Not sure if you're
asking for some deletion. no change to text.</i></b></font>
<br>
<br>
<br>
<br><font size=3D2><tt>21) &quot;4.6.3. Route Tracking </tt></font>
<br><font size=3D2><tt><br>
 &nbsp; Route diagnostics SHOULD be supported providing information such
as <br>
 &nbsp; path quality; number of hops; available alternate active paths
with <br>
 &nbsp; associated costs. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; Please define &quot;path quality&quot;.</tt><=
/font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Whatever means we=
 employ
to select one path over other paths. &nbsp;In debugging, it's sometime
unclear why one path is selected in lieu of other paths. &nbsp;This info
should be available.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I added the sente=
nce...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Path quality is t=
he
relative measure of &#8216;goodness&#8217; of the selected source to destin=
ation
path as compared to alternate paths. &nbsp;This &nbsp;composite value may
be measured as a function of hop count, signal strength, available power,
existing active paths or any other criteria deemed by ROLL as the path
cost differentiator.</i></b></font>
<p>
<br><font size=3D2><tt>22) Section 4.7</tt></font>
<br><font size=3D2><tt>JP&gt; I understand your concern but this is not a
routing requirement either. The IETF specifies IP-based protocol and cannot
depend on non-IP protocols. I would suggest to remove that section.</tt></f=
ont>
<br><font size=3D2 color=3Dblue><b><i>BACnet is an application protocol that
sits atop of UDP. &nbsp;Hence it is an IP protocol!!!. &nbsp; To me, this
is no different than assuring that ROLL/6LoWPAN supports FTP. &nbsp;</i></b=
></font>
<br><font size=3D2 color=3Dblue><b><i>I don't know if LON has intrinsic IP
support. &nbsp;I will drop the LON requirement. &nbsp;The text now reads
...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The building auto=
mation
industry adheres to BACnet, a UDP/IP application layer protocol, to achieve
vendor interoperability. &nbsp;It is estimated that fully 80% of customer
bid requests received world-wide will require compliance to this ISO standa=
rd
within five years. &nbsp;ROLL routing SHOULD support this application proto=
col
to assure acceptance in the building automation industry. </i></b></font><f=
ont size=3D3 face=3D"sans-serif">&nbsp;</font>
<br>
<br>
<br><font size=3D2><tt>23) Section 4.7.1</tt></font>
<br><font size=3D2><tt>Per our charter, we exclusively focus on IPv6. Furth=
ermore,
the term intercommunication is ambiguous. I would suggest to delete 4.7.1</=
tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I &nbsp;moved this
requirement to Appendix A as being out of scope for ROLL. &nbsp;However,
the FMS industry has been installing IPv4 devices into buildings for at
least 10 years. &nbsp;These devices have a lifetime of at least 25 years
and will need to communicate to newer devices. &nbsp;If we (the IETF) don't
provide a seamless interface across IPv4 and IPv6 we can expect little
interest in this market.</i></b></font>
<br>
<br><font size=3D2><tt>24) Section 4.7.2</tt></font>
<br><font size=3D2><tt>&quot;Routing MUST support packet sizes to 1526 octe=
ts
(to be backwards </tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;compatible with 802.3 subnetworks) &quo=
t;</tt></font>
<br><font size=3D2><tt>JP&gt; Please remove the text in parenthesis. Strict=
ly
speaking the ROLL protocol(s) will not be backward compatible with 802.3.</=
tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Done.</i></b></fo=
nt>
<br>
<br><font size=3D2><tt>25) &quot;Route discovery occurring during packet
</tt></font>
<br><font size=3D2><tt>&nbsp; &nbsp;transmission MUST not exceed 120 msecs.=
&quot;</tt></font>
<br><font size=3D2><tt>JP&gt; I would suggest to slightly reword since it
gives the impression that you mandate a reactive routing mechanism.</tt></f=
ont>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I tried to clarify
the need and changed the MUST to SHOULD. &nbsp;It now reads ...</i></b></fo=
nt>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Route discovery o=
ccurring
during packet transmission SHOULD not add more than 120 msecs latency to
the packet mean delivery time.</i></b></font>
<p>
<br>
<br><font size=3D2><tt>26) &quot;4.8.5. Route Preference </tt></font>
<br><font size=3D2><tt><br>
 &nbsp; The route discovery mechanism SHOULD allow a source node (sensor)
to <br>
 &nbsp; dictate a configured destination node (controller) as a preferred
<br>
 &nbsp; routing path. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; mmm ... what do you mean by &quot;dictate a
configured destination node as a preferred path ?&quot;. Do you mean that
the routing protocol SHOULD allow for routing along a configured path on
the source ?</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The word 'dictate'
is probably too strong. &nbsp;Maybe 'suggest' would be better. &nbsp;What
I'm trying to note is that many FMS applications have apriori knowledge
of the spatial placement of the client and server devices. &nbsp;Yet the
'route cost' algorithms don't &nbsp;account for this knowledge in the costi=
ng
algorithm calculations. &nbsp;As an example, a room temperature sensor
and its associated room controller are always within point-to-point distanc=
e.
&nbsp;Yet empirical data shows that many times the path will have additional
hops. &nbsp;The added latency of a couple additional hops isn't at issue.
&nbsp;It's just the extra load on the network to hop across extraneous
devices.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I changed the text
to read ...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Route cost algori=
thms
SHOULD allow the installer to optionally select 'preferred' paths based
on the known spatial layout of the communicating devices.</i></b></font>
<p>
<br><font size=3D2><tt>27) &quot;4.8.6. Path Persistence </tt></font>
<br><font size=3D2><tt><br>
 &nbsp; To eliminate high network traffic in power-fail or brown-out <br>
 &nbsp; conditions previously established routes SHOULD be remembered and
<br>
 &nbsp; invoked prior to establishing new routes for those devices reenteri=
ng
<br>
 &nbsp; the network. &quot;</tt></font>
<br><font size=3D2><tt>JP&gt; This is a device / implementation-specific
choice. Should be removed.</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>I disagree. &nbsp=
;We're
dealing with a LLNs that can ill-afford to have hundreds of nodes simultane=
ously
purge their neighbor lists and routing tables just because of a 1 second
brownout! &nbsp;I think at some point the IETF has to take into account
that LLNs are very limited data highways and mandate certain operational
modes.</i></b></font>
<br>
<br>
<br><font size=3D2><tt>28) Please remove Section 6</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Hmmm, &nbsp;little
confused here since prior comments changed the section numbers. &nbsp;I
am assuming this comment references the 'Open Issues' section. &nbsp;I've
deleted that section. &nbsp;</i></b></font>
<br>
<br>
<br><font size=3D2><tt>29) Security.</tt></font>
<br><font size=3D2><tt>JP&gt; Don't you have any security requirements ?
Could you please look at:</tt></font>
<br><a href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-ro=
uting-reqs-03.txt"><font size=3D2 color=3Dblue><tt><u>http://www.ietf.org/i=
nternet-drafts/draft-ietf-roll-urban-routing-reqs-03.txt</u></tt></font></a>
<br><a href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-ro=
uting-reqs-03.txt"><font size=3D2 color=3Dblue><tt><u>http://www.ietf.org/i=
nternet-drafts/draft-ietf-roll-indus-routing-reqs-03.txt</u></tt></font></a>
<br><a href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-home-rou=
ting-reqs-06.txt"><font size=3D2 color=3Dblue><tt><u>http://www.ietf.org/in=
ternet-drafts/draft-ietf-roll-home-routing-reqs-06.txt</u></tt></font></a>
<br><font size=3D2><tt>to see if you do not have security requirements along
those lines ?</tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Yes. &nbsp;My fir=
st
draft had 10 pages of security requirements! &nbsp;However, we deemed them
out of scope since these requirements do not affect routing. &nbsp;What
we seemed to agree to in the email exchanges is that a node must be trusted
(and possibly authenticated) upon joining the network, but once a trusted
node joins the network, it can move packets across the network unimpeded
by security concerns.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>The text now reads
...</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7. &nbsp; &nbsp;=
 &nbsp;
&nbsp; Security Considerations</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Security policies,
especially wireless encryption and device authentication needs to be consid=
ered,
especially with concern to the impact on the processing capabilities and
additional latency incurred on the sensors, actuators and controllers.</i><=
/b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>FMS systems are t=
ypically
highly configurable in the field and hence the security policy is most
often dictated by the type of building to which the FMS is being installed.
&nbsp; Single tenant owner occupied office buildings installing lighting
or HVAC control are candidates for implementing low or even no security
on the LLN. &nbsp;Antithetically, military or pharmaceutical facilities
require strong security policies. &nbsp;As noted in the installation proced=
ures
above, security policies must be facile to allow no security during the
installation phase (prior to building occupancy), yet easily raise the
security level network wide during the commissioning phase of the system.</=
i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1. &nbsp; &nbsp;
&nbsp; &nbsp; Security Requirements</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.1. &nbsp; &n=
bsp;
&nbsp; &nbsp; Authentication</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Authentication M=
UST
be optional on the LLN. &nbsp;Authentication MUST be fully configurable
on-site. Authentication policy and updates MUST be transmittable over-the-a=
ir.
&nbsp;Authentication MUST occur upon joining or rejoining a network. &nbsp;=
However,
once authenticated devices SHOULD not need to reauthenticate themselves
with any other devices in the LLN.</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.2. &nbsp; &nb=
sp;
&nbsp; &nbsp; Encryption</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.2.1. &nbsp; =
&nbsp;
&nbsp; &nbsp; Encryption Levels</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Encryption MUST =
be
optional on the LLN. &nbsp;Encryption MUST be fully configurable on-site.
&nbsp;Encryption policy and updates MUST be transmittable over-the-air
and in-the-clear. &nbsp;</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.2.2. &nbsp; &=
nbsp;
&nbsp; &nbsp; Security Policy Flexibility</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>In most faciliti=
es
authentication and encryption will be turned off during installation. &nbsp=
;</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>More complex encr=
yption
policies might be put in force at commissioning time. &nbsp;New encryption
policies MUST be allowed to be presented to all devices in the LLN over
the network without needing to visit each device.</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.2.3. &nbsp; &=
nbsp;
&nbsp; &nbsp; Encryption Types</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Data encryption =
of
packets MUST optionally be supported by use of either a network wide key
and/or application key. &nbsp; &nbsp;The network key would apply to all
devices in the LLN. &nbsp;The application key would apply to a subset of
devices on the LLN. &nbsp;</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>The network key a=
nd
application keys would be mutually exclusive. &nbsp;Forwarding devices
in the mesh MUST be able to forward a packet encrypted with an application
key without needing to have the application key.</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.2.4. &nbsp; &=
nbsp;
&nbsp; &nbsp; Packet Encryption </i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>The encryption p=
olicy
MUST support encryption of the payload only or the entire packet. &nbsp;Pay=
load
only encryption would eliminate the decryption/re-encryption overhead at
every hop.</i></b></font>
<p><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>7.1.3. &nbsp; &nb=
sp;
&nbsp; &nbsp; Disparate Security Policies</i></b></font>
<br><font size=3D2 color=3Dblue face=3D"Courier New"><b><i>Due to the limit=
ed
resources of an LLN, the security policy defined within the LLN MUST be
able to differ from that of the rest of the IP network within the facility
yet packets MUST still be able to route to or through the LLN from/to these
networks.</i></b></font>
<p>
<p>
<br>
<br><font size=3D2><tt>30) Please remove (see comments number 32 below)</tt=
></font>
<br><font size=3D2><tt>&nbsp; &nbsp; See Appendix A for additional requirem=
ents
<br>
 &nbsp; that have been deemed outside the scope of this document yet will
<br>
 &nbsp; pertain to the successful deployment of building automation systems.
</tt></font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>See below</i></b>=
</font>
<br>
<br><font size=3D3>31) References</font>
<br>
<br><font size=3D3>Please reformat the references section to list the relev=
ant
details of each document + add a normative reference to RFC 2119.</font>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>Done.</i></b></fo=
nt>
<br>
<br><font size=3D3>For example:</font>
<br>
<br><font size=3D2><tt>10. &nbsp;References<br>
<br>
10.1. &nbsp;Normative References<br>
<br>
 &nbsp; [RFC2119] &nbsp;Bradner, S., &quot;Key words for use in RFCs to
Indicate<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Requirement Levels&quot;,
BCP 14, RFC 2119, March 1997.<br>
<br>
10.2. &nbsp;Informative References<br>
<br>
 &nbsp; [I-D.ietf-roll-home-routing-reqs]<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Brandt, A., Buron, J.,
and G. Porcu, &quot;Home Automation<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Routing Requirements in
Low Power and Lossy Networks&quot;,<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;draft-ietf-roll-home-routi=
ng-reqs-06
(work in progress),<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;November 2008.</tt></font>
<br>
<br><font size=3D3>32) Appendix A</font>
<br><font size=3D2><tt>The requirements will need to <br>
 &nbsp; be addressed by ROLL or other WGs before adoption by the building
<br>
 &nbsp; automation industry will be considered. </tt></font>
<br><font size=3D2><tt>JP&gt; Please remove, since ROLL is about routing,
thus we will not be chartered to address non routing requirements.</tt></fo=
nt>
<br><font size=3D2><tt>Giving more thoughts, this appendix does provide very
useful and well documented data. That being said, they do not really belong
to this document and may introduce confusion. I would suggest to remove
this appendix from the document.</tt></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>In my mind the re=
quirements
noted in &nbsp;Appendix A are as important to the successful deployment
of IP wireless sensor networks than most of those still in the body of
the document. &nbsp;It's only because of the compartmentalized nature of
the IETF that you feel they are out of scope. &nbsp;I think it's very impor=
tant
that we continue to look at the requirement set holistically even if our
current mission is more tightly focused. &nbsp;I would like to leave Append=
ix
A included in this document.</i></b></font>
<br>
<br><font size=3D2 color=3Dblue face=3D"sans-serif"><b><i>&nbsp;</i></b></f=
ont>
<br>
<br>
<br><font size=3D3>Thanks.</font>
<br>
<br><font size=3D3>JP.</font>
<br>
<br>
<br><font size=3D3>Begin forwarded message:</font>
<br>
<br><font size=3D4><b>From: </b></font><a href=3D"mailto:Internet-Drafts@ie=
tf.org"><font size=3D4 color=3Dblue><u>Internet-Drafts@ietf.org</u></font><=
/a>
<br><font size=3D4><b>Date: </b>January 15, 2009 12:00:02 AM CEST</font>
<br><font size=3D4><b>To: </b></font><a href=3D"mailto:i-d-announce@ietf.or=
g"><font size=3D4 color=3Dblue><u>i-d-announce@ietf.org</u></font></a>
<br><font size=3D4><b>Cc: </b></font><a href=3Dmailto:roll@ietf.org><font s=
ize=3D4 color=3Dblue><u>roll@ietf.org</u></font></a>
<br><font size=3D4><b>Subject: [Roll] I-D Action:draft-ietf-roll-building-r=
outing-reqs-02.txt</b></font>
<br>
<br><font size=3D3>A New Internet-Draft is available from the on-line Inter=
net-Drafts
directories.<br>
This draft is a work item of the Routing Over Low power and Lossy networks
Working Group of the IETF.<br>
<br>
<br>
Title &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; : Building Automation Routing
Requirements in Low Power and Lossy Networks<br>
Author(s) &nbsp; &nbsp; &nbsp; : J. Martocci, et al.<br>
Filename &nbsp; &nbsp; &nbsp; &nbsp;: draft-ietf-roll-building-routing-reqs=
-02.txt<br>
Pages &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; : 27<br>
Date &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;: 2009-01-14<br>
<br>
The Routing Over Low power and Lossy network (ROLL) Working Group has <br>
been chartered to work on routing solutions for Low Power and Lossy <br>
networks (LLN) in various markets: Industrial, Commercial (Building), <br>
Home and Urban. Pursuant to this effort, this document defines the <br>
routing requirements for building automation. <br>
<br>
Requirements Language <br>
<br>
The key words &quot;MUST&quot;, &quot;MUST NOT&quot;, &quot;REQUIRED&quot;,
&quot;SHALL&quot;, &quot;SHALL NOT&quot;, <br>
&quot;SHOULD&quot;, &quot;SHOULD NOT&quot;, &quot;RECOMMENDED&quot;, &quot;=
MAY&quot;,
and &quot;OPTIONAL&quot; in this <br>
document are to be interpreted as described in RFC-2119.<br>
<br>
A URL for this Internet-Draft is:</font><font size=3D3 color=3Dblue><u><br>
</u></font><a href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-b=
uilding-routing-reqs-02.txt"><font size=3D3 color=3Dblue><u>http://www.ietf=
.org/internet-drafts/draft-ietf-roll-building-routing-reqs-02.txt</u></font=
></a><font size=3D3><br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
ftp://ftp.ietf.org/internet-drafts/<br>
<br>
Below is the data which will enable a MIME compliant mail reader<br>
implementation to automatically retrieve the ASCII version of the<br>
Internet-Draft.=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F<br>
Roll mailing list<br>
Roll@ietf.org<br>
https://www.ietf.org/mailman/listinfo/roll</font>
<br>
<br><font size=3D2 face=3D"sans-serif">[attachment &quot;mime-attachment&qu=
ot;
deleted by Jerald P Martocci/CORP/Johnson=5FControls] </font>
<br>=

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Dear Thomas,

Since we want to conclude this work end of this week according to the  
schedule, we worked with the authors yesterday.

We propose to add two new paragraph to address your concern (see  
below) and Phil will also post a new revision addressing the other  
comments.

Could you please then ACK ?

Please see in line for JP>

On Jan 23, 2009, at 12:32 PM, JP Vasseur wrote:

> Hi Thomas,
>
> On Jan 23, 2009, at 10:40 AM, Thomas Heide Clausen wrote:
>
>> Dear Authors, All,
>>
>> Since I'm taking stabs at 6lowpan here as well, I've included the  
>> 6lowpan AD as Cc to this email.
>>
>> Thanks for producing an updated I-D so quickly. JP asked for a  
>> quick turn-around on the review as well, and so I have reviewed the  
>> document, and attached a pdf as I did last time, to include my  
>> detailed/nittty-gritty comments as well.
>>
>
> And thanks for this Thomas, we very much appreciate the detailed  
> comments. As pointed in many emails we now passed WG LC several  
> weeks, and I want to close on this work item *this week* so as not  
> to further delay our progress as a WG. I know that you agree and  
> understand.
>
>> I think that the document has improved some, however I still have  
>> some high-level comments, in addition to the nitty-gritty ones  
>> included in the pdf and those that I raised in my -03 review which  
>> are not yet addressed.
>
> Let me reply on the high level comments and I'm sure that Phil and  
> his co-authors will quickly address the other ones.
>
>> I raise the high-level ones here, as those are what I think we need  
>> to resolve before sending the document onwards.
>>
>> 	o	I note that a number of my review comments from -03 have not  
>> been addressed, and so
>> 		I consider those to still be applicable and encourage that my -03  
>> review be reconsidered.
>> 		In particular, some of the comments which I would consider "easy  
>> fixes" have not been
>> 		incorporated. I wonder if it would be possible to expand on why  
>> not?
>>
>> 		That said, there are a number of also important comments  
>> (terminology-confusion,
>> 		omissions etc.) that I pointed out in my -03 review, which have  
>> not been addressed
>> 		(either through inclusion of text or through debunking on the  
>> 'list)
>
> I will work with Phil, Steve and Arsalan on these comments today and  
> over the week-end if they are available to get then addressed.
>

JP> Phil mentioned that he was working on a new revision to address  
the detailed comments.

>>
>>
>> 	o	It's still not clear how ROLL distinguishes itself from, say,  
>> MANET or 6low. Many of the
>> 		characteristics listed for ROLL deployments are isomorphic to  
>> those listed for MANET
>> 		and 6low, and even having read through the document(s) multiple  
>> times, I'm still left
>> 		having to guess.
>
> Ah you push my Hot Button ... since this discussion has been going  
> on for some time, was entirely resolved and pops up again. As you  
> know such questions are resolved when a WG is chartered (we are no  
> longer in a WG formation process, BOF, ...). That being said, we owe  
> you an answer. I'm just wondering whether we should try by writing  
> or simply discussing in SFO. But for the time being I think that  
> trying to position/compare/.... WGs is not that productive. The WG  
> chairs are all in sync and we can find some time with you to clarify  
> anything you want.
>

JP> I hopefully address your point here. Nothing more to add.

>>
>>
>> 		As the charter is relatively vague on this matter (it's not  
>> really a criticism of the charter,
>> 		it is as I think is reasonable for a wg with goal of "figuring  
>> our what to do next"),
>> 		I think it is a paramount requirement that this document -- which  
>> aims at evaluating
>> 		existing protocols for their applicability -- is extremely  
>> specific on this matter.
>>
>> 		So, my BIGGEST issue remains: the document concludes that "no  
>> existing protocols
>> 		are applicable as-is" -- but does not spell out, or even hint at,  
>> "applicable for what?"
>>
>> 		Would it be possible to add a section somewhere clearly stating  
>> this?
>
> Of course. I thought that this has been clarified but let me try  
> again and we'll draft a short text: the objective was to determine  
> whether we could find an existing protocol (as is) in order to meet  
> to requirements spelled out on the 4 WG documents for industrial  
> automation, urban networks, home automation and building automation.  
> That is it. You asked to clearly state that we should not exclude  
> existing protocol from being extended in the future to meet these  
> requirements, which we did, and we absolutely agree with you  
> (something we discussed several time in ROLL WG meetings).

JP> We owe you some text here, it is indeed a good idea to add some  
text:

PROPOSED TEXT:

Conclusion

Table XX shows that no existing IETF protocol specification meets the  
criteria described in Section YY
Therefore, having a routing protocol for LLNs requires new protocol  
specification documents. Whether
such documents describe modifications to existing protocols or new  
protocols it outside the scope of this
document and warrants further discussion. The new protocol  
specification will be based on the ROLL
routing requirements listed in the application-specific requirements  
documents [I-D.ietf-roll-home-routing-reqs]
[I-D.ietf-roll-indus-routing-reqs], [I-D.martocci-roll-building- 
routing-reqs].The results in Table XX may provide
some insight or guidance in such a discussion, indicating what  
protocol mechanisms may be better suited
to LLNs than others.

You made another comment that deserves additional text.

PROPOSED TEXT

New paragraph just before the "Formal Definitions" subsection:

A protocol failing to meet one or more of the criteria does not  
exclude it from being used in LLNs. Rather, it means
that, in order to be used in LLNs, the protocol would need to be  
extended in ways that do not conform with the current
specification document.

>
> Yes we could add other criteria in the protocol survey, change  
> them, ... but there was a good consensus in the WG to move ahead  
> with these (necessary but not sufficient) criteria.
>
> One (if) re-chartered for protocol work, we (as a WG) will look at  
> various existing candidates (with potential extensions such as OLSR  
> fish eye, RIP, ...) or new protocol. In the former we will of course  
> closely work with the WGs that own these protocol in light of the  
> application specific routing requirements.
>
>>
>> 		Let me cite from the 6low charter:
>>
>>
>> 			  "Well-established fields such as control networks, and  
>> burgeoning ones
>> 	such as "sensor" (or transducer) networks, are increasingly being
>> 	based on wireless technologies. Most (but certainly not all) of  
>> these
>> 	nodes are amongst the most constrained that have ever been networked
>> 	wirelessly. Extreme low power (such that they will run potentially  
>> for
>> 	years on batteries) and extreme low cost (total device cost in  
>> single
>> 	digit dollars, and riding Moore's law to continuously reduce that
>> 	price point) are seen as essential enablers towards their deployment
>> 	in networks with the following characteristics...."
>>
>> 		The 6lowpan charter even cites a milestone thus "Sep 2008: Submit  
>> Routing
>> 		Requirements document to IESG for consideration as an  
>> Informational RFC"
>>
>> 		Reading this indicates an overlap, and one could ask "Is ROLL the  
>> routing component
>> 		of 6low?". If yes, then this should probably be stated  
>> explicitly. If NO, then this probably
>> 		also should be stated explicitly -- and a justification given as  
>> well.
>
> No. We do not have in this document to put the relationship with all  
> other WG in perspective. That being said, I am happy to provide you  
> an explanation since this has been discussed many times in the past  
> (in 6lowpan and ROLL - look at the minutesm, "presentations", ...).  
> I was personally opposed to see that 6lowpan WG item on routing  
> since by definition routing is "agnostic" (not ignorant) to the PHY/ 
> MAC. The WG consensus was to have this WG item included the charter  
> and consensus wins, which is a good thing :-) In its current form, I  
> do not think that the WG ID is acceptable and I proposed (with the  
> agreement of the 6lowpan chairs and Mark) to propose a new revision  
> so as to clearly state that these routing requirement will be  
> 6lowpan specifics. ROL and 6lowpan will happily work together on  
> this. Issue closed. Hope this sheds some light.
>
> Now I cannot resist from making a general comment here: it is very  
> much welcome to receive comments, guidance, ... but please do not re- 
> open debates on which people have spent a lot of time and reached  
> consensus. ROLL has been moving fast with a lot of energy and time  
> from its active participants and I do not want to loose that  
> traction and motion. Hope you understand.
>
>>
>>
>> 		The same kind of argument can be made, let me cite from the MANET  
>> charter:
>>
>> 	   "The purpose of the MANET working group is to standardize IP  
>> routing
>> 	protocol functionality suitable for wireless routing application  
>> within
>> 	both static and dynamic topologies with increased dynamics due to  
>> node
>> 	motion or other factors"
>>
>> 		It does not explicitly enumerate the characteristics of "wireless  
>> routing", but again the relationship
>> 		with ROLL isn't clear.
>
> Note that we could do a similar exercise with many other WGs.
>
>>
>>
>> 		I think that this is the biggest piece missing from this document  
>> -- and I think that it's
>> 		a piece of paramount importance as well, so I really really think  
>> that we need to
>> 		write up something to clarify this.
>>
>
> The relationship with 6lowpan is fairly clear and ROLL and 6lowpan  
> works in concert. The only ambiguity was for the routing requirement  
> ID in 6lowpan (which is about 6lowpan specific issue) for which I  
> hope I clarified the situation. With regards to MANET, this is also  
> fairly simple. Should we decide to use a routing protocol of the  
> MANET WG, we will be more than happy to work with MANET to provide  
> the requirements and get the protocol extensions worked out by the  
> MANET WG. It is that simple :-)
>
>>
>> 	o	I still see "Criteria" used, and I think that it's not the right  
>> term. "Evaluation metrics" seems
>> 		a much more appropriate term. I've argued why in my previous  
>> review, and so I'll defer to
>> 		that for details as to why -- but I REALLY do encourage changing  
>> the term.
>>
>> 		I can say the magic word ("please"), if it helps any ;)
>>
>> 	o	There still are a few inconsistencies as to if not attaining a  
>> "pass" on all the evaluation
>> 		metrics means that the protocol:
>>
>> 			o	cannot be used
>> 			o	is not a candidate at all
>> 			o	cannot be used as-is, but may be modified to work
>>
>> 		Sections 1 (last paragraph), 3.2, 4.0 (2nd paragraph) send  
>> slightly different messages as to
>> 		this.
>>
>> 		This ties in with another problem, that I just notice right now.  
>> Section 1 ends with:
>>
>> 			"Whether or not such a protocol involves modifications to an  
>> existing
>> 			   protocol or a new protocol entirely is outside the scope of  
>> this
>> 			   document: this document simply seeks to answer the question:  
>> do LLNs
>> 			   require a new protocol specification document at all?"
>>
>> 		Which I can agree with, as such. However 3.2 reads:
>>
>> 			"A protocol that does not meet the criteria cannot be used as
>> 			   specified, but it is possible that a protocol meets the  
>> criteria yet
>> 			   is not able to meet the requirements of a particular  
>> application
>> 			   domain.  Nevertheless, a protocol that meets all of the  
>> criteria
>> 			   would be very promising, and deserve a closer look and  
>> consideration
>> 			   in light of LLN application domains."
>>
>> 		And 4.0:
>> 		
>> 			"If a protocol  cannot meet even these minimalist criteria, then  
>> it cannot be used
>> 			   unchanged in several major ROLL application domains and so is
>> 			   unlikely to be a good candidate for use."
>>
>>
>> 		The offending bits here are the last sentence in the quote from  
>> 3.2, and the
>> 		"is unlikely to be a good candidate for use" from 4.
>>
>> 		Now, 1 states that the goal simply is to identify "can an  
>> existing protocol
>> 		specification be used?".
>>
>> 		3.2 and 4.0 state, essentially, that the document go both beyond  
>> and below that,
>> 		by admitting that "no, we cannot answer that, the evaluation  
>> metrics presented
>> 		do not allow answering this question completely" -- and "oh, the  
>> document also
>> 		tries to identify protocols that could be further developed/ 
>> investigated".
>>
>> 		In other words, the document sets out to do one thing, then  
>> doesn't quite do that,
>> 		but does something else. While I am sure that that's not the  
>> intent, it could be
>> 		read as if the document essentially had as objective to "dismiss  
>> all related IETF work"
>> 		-- and I'd really rather that we not be accused of that ;)
>>
>
> We will address these comments.

JP> See the new revision and let us know if we addressed your comments.

>
>> 	o	Security
>> 		
>> 		It still troubles me a great deal that the "Security  
>> Considerations" section is
>> 		intentionally left blank. It strikes me that the different  
>> protocols discussed have
>> 		different properties with respect to how they can be secured --  
>> and that this
>> 		discussion belongs in this document. If not, then I think the  
>> rationale as to why
>> 		this document does not consider security MUST be included in the  
>> security
>> 		considerations section.
>>
>
> Just because we looked at the (necessary) but not sufficient criteria.
>
>> 		Or, if security simply is not at all important in ROLL networks,  
>> then stating that
>> 		as reason for not discussing security would likely be enough?
>>
>
> Look at our charter, it is quite critical. But again, if a WG does  
> not pass the existing criteria this is enough to conclude.
>
> AGAIN, that does not mean that we will not use such a protocol with  
> extensions at all. The question is" can we use this
> protocol as-is" ?
>
>>
>> 	o	I've made some additional comments to the evaluation of OLSR as  
>> well, I encourage
>> 		that these be considered.
>>
>> I think that these high-level points are important to get  
>> straightened out before moving this document forward. I see that  
>> others have raised issues as well, I'll reply to those with my  
>> comments.
>
> Hope I clarified.

Thanks.

>
> Thanks.
>
> JP.
>
>>
>> Cheers,
>>
>> Thomas
>>
>> <draft-ietf-roll-protocols-survey-04_review.pdf>
>


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Dear =
Thomas,<div><br></div><div>Since we want to conclude this work end of =
this week according to the schedule, we worked with the authors =
yesterday.&nbsp;</div><div><br></div><div>We propose to add two new =
paragraph to address your concern (see below) and Phil will also post a =
new revision addressing the other =
comments.</div><div><br></div><div>Could you please then ACK =
?</div><div><br></div><div>Please see in line for =
JP></div><div><br><div><div>On Jan 23, 2009, at 12:32 PM, JP Vasseur =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; ">Hi =
Thomas,<div><br><div><div>On Jan 23, 2009, at 10:40 AM, Thomas Heide =
Clausen wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; ">Dear Authors, =
All,<div><br></div><div>Since I'm taking stabs at 6lowpan here as well, =
I've included the 6lowpan AD as Cc to this =
email.</div><div><br></div><div>Thanks for producing an updated I-D so =
quickly. JP asked for a quick turn-around on the review as well, and so =
I have reviewed the document, and attached a pdf as I did last time, to =
include my detailed/nittty-gritty comments as =
well.&nbsp;</div><div><br></div></div></blockquote><div><br></div><div>And=
 thanks for this Thomas, we very much appreciate the detailed comments. =
As pointed in many emails we now passed WG LC several weeks, and I want =
to close on this work item *this week* so as not to further delay our =
progress as a WG. I know that you agree and =
understand.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div>I think that the document has improved some, =
however I still have some high-level comments, in addition to the =
nitty-gritty ones included in the pdf and those that I raised in my -03 =
review which are not yet addressed. =
</div></div></blockquote><div><br></div><div>Let me reply on the high =
level comments and I'm sure that Phil and his co-authors will quickly =
address the other ones.</div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div>I raise the high-level =
ones here, as those are what I think we need to resolve before sending =
the document onwards.</div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I note =
that a number of my review comments from -03 have not been addressed, =
and so<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I consider those to still =
be applicable and encourage that my -03 review be =
reconsidered.<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>In particular, some of =
the comments which I would consider "easy fixes" have not =
been<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>incorporated. I wonder if =
it would be possible to expand on why =
not?<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>That said, there are a =
number of also important comments =
(terminology-confusion,&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>omissions etc.) that I =
pointed out in my -03 review, which have not been =
addressed&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>(either through inclusion =
of text or through debunking on the =
'list)</div></div></blockquote><div><br></div><div>I will work with =
Phil, Steve and Arsalan on these comments today and over the week-end if =
they are available to get then =
addressed.</div><br></div></div></div></blockquote><div><br></div><div>JP>=
 Phil mentioned that he was working on a new revision to address the =
detailed comments.</div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><div><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>It's still not clear how ROLL =
distinguishes itself from, say, MANET or 6low. Many of =
the&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>characteristics listed =
for ROLL deployments are isomorphic to those listed for =
MANET&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>and 6low, and even having =
read through the document(s) multiple times, I'm still =
left<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>having =
to&nbsp;guess.</div></div></blockquote><div><br></div><div>Ah you push =
my Hot Button ... since this discussion has been going on for some time, =
was entirely resolved and pops up again. As you know such questions are =
resolved when a WG is chartered (we are no longer in a WG formation =
process, BOF, ...). That being said, we owe you an answer. I'm just =
wondering whether we should try by writing or simply discussing in SFO. =
But for the time being I think that trying to position/compare/.... WGs =
is not that productive. The WG chairs are all in sync and we can find =
some time with you to clarify anything you =
want.</div><br></div></div></div></blockquote><div><br></div><div>JP> I =
hopefully address your point here. Nothing more to =
add.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; =
"><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>As the charter is =
relatively vague on this matter (it's not really a criticism of the =
charter,</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>it is as I think is =
reasonable for a wg with goal of "figuring our what to do =
next"),</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think it is a paramount =
requirement that this document -- which aims at =
evaluating<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>existing protocols for =
their applicability -- is extremely specific on this =
matter.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>So, my BIGGEST issue =
remains: the document concludes that "no existing =
protocols<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>are applicable as-is" -- =
but does not spell out, or even hint at, "applicable for =
what?"<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Would it be possible to =
add a section somewhere clearly stating =
this?</div></div></blockquote><div><br></div><div>Of course. I thought =
that this has been clarified but let me try again and we'll draft a =
short text: the objective was to determine whether we could find an =
existing protocol (as is) in order to meet to requirements spelled out =
on the 4 WG documents for industrial automation, urban networks, home =
automation and building automation. That is it. You asked to clearly =
state that we should not exclude existing protocol from being extended =
in the future to meet these requirements, which we did, and we =
absolutely agree with you (something we discussed several time in ROLL =
WG =
meetings).</div></div></div></div></blockquote><div><br></div><div>JP> =
We owe you some text here, it is indeed a good idea to add some =
text:</div><div><br></div><div>PROPOSED =
TEXT:</div><div><br></div><div>Conclusion<br><br>Table XX shows that no =
existing IETF protocol&nbsp;specification meets the criteria described =
in Section YY<br>Therefore, having a routing protocol for&nbsp;LLNs =
requires new&nbsp;protocol specification documents. =
Whether&nbsp;</div><div>such&nbsp;documents describe modifications to =
existing protocols or new&nbsp;protocols it outside the scope of =
this&nbsp;</div><div>document and warrants&nbsp;further discussion. The =
new protocol specification will be based on the =
ROLL&nbsp;</div><div>routing requirements listed in the&nbsp;<span =
class=3D"Apple-style-span" style=3D"white-space: pre-wrap; =
">application-specific requirements documents =
[I-D.ietf-roll-home-routing-reqs]</span></div><div><span =
class=3D"Apple-style-span" style=3D"white-space: pre-wrap; =
">[I-D.ietf-roll-indus-routing-reqs],<span class=3D"Apple-style-span" =
style=3D"white-space: normal; "><span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap; "> =
[I-D.martocci-roll-building-routing-reqs].</span>The results in Table =
XX&nbsp;may provide&nbsp;</span></span></div><div><span =
class=3D"Apple-style-span" style=3D"white-space: pre-wrap; "><span =
class=3D"Apple-style-span" style=3D"white-space: normal; ">some =
insight&nbsp;or guidance in such a&nbsp;discussion, indicating what =
protocol mechanisms may be better =
suited&nbsp;</span></span></div><div><span class=3D"Apple-style-span" =
style=3D"white-space: pre-wrap; "><span class=3D"Apple-style-span" =
style=3D"white-space: normal; ">to LLNs&nbsp;than =
others.</span></span></div><div><br></div><div>You made another comment =
that deserves additional text.</div><div><br></div><div>PROPOSED =
TEXT</div><div><br></div><div>New paragraph just before the "Formal =
Definitions" subsection:<br><br>A protocol failing to meet one or more =
of the criteria&nbsp;does not exclude it from being used in LLNs. =
Rather, it means</div><div>that, in order to be used in LLNs, the =
protocol would need&nbsp;to be extended in ways that do not conform with =
the current<br>specification document.</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><div><div><br></div><div>Yes we could add other criteria in the =
protocol survey, change them, ... but there was a good consensus in the =
WG to move ahead with these (necessary but not sufficient) =
criteria.</div><div><br></div><div>One (if) re-chartered for protocol =
work, we (as a WG) will look at various existing candidates (with =
potential extensions such as OLSR fish eye, RIP, ...) or new protocol. =
In the former we will of course closely work with the WGs that own these =
protocol in light of the application specific routing =
requirements.</div><div><br></div><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>Let me cite from&nbsp;the 6low =
charter:</div><div><br></div><div><br></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><font =
class=3D"Apple-style-span" face=3D"Courier"><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Helvetica" size=3D"3"><span class=3D"Apple-style-span" =
style=3D"font-size: 12px;">	<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>  =
"</span></font></span>Well-established fields such as control networks, =
and burgeoning ones</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>such as "sensor" (or transducer) networks, are =
increasingly being<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">based on wireless technologies. Most (but certainly not =
all) of these<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">nodes are amongst the most constrained that have ever =
been networked<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">wirelessly. Extreme low power (such that they will run =
potentially for<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">years on batteries) and extreme low cost (total device =
cost in single<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">digit dollars, and riding Moore's law to continuously =
reduce that<br></font><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
face=3D"Courier">	</font></span><font class=3D"Apple-style-span" =
face=3D"Courier">price point) are seen as essential enablers towards =
their deployment<br></font></font></div><div><span =
class=3D"Apple-style-span" style=3D"font-size: 16px; "><span =
class=3D"Apple-tab-span" style=3D"white-space:pre"><font =
class=3D"Apple-style-span" face=3D"Courier">	</font></span><font =
class=3D"Apple-style-span" face=3D"Courier">in networks with the =
following =
characteristics...."</font></span><br></div><div><br></div><div><div><span=
 class=3D"Apple-tab-span" style=3D"white-space: pre; ">		=
</span>The 6lowpan charter even cites a milestone thus "Sep =
2008:&nbsp;Submit Routing&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Requirements document to =
IESG for consideration as an Informational =
RFC"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Reading this indicates an =
overlap, and one could ask "Is ROLL the routing =
component&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>of 6low?". If yes, then =
this should probably be stated explicitly. If NO, then this =
probably</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>also should be stated =
explicitly -- and a justification given as =
well.</div></div></div></blockquote><div><br></div><div>No. We do not =
have in this document to put the relationship with all other WG in =
perspective. That being said, I am happy to provide you an explanation =
since this has been discussed many times in the past (in 6lowpan and =
ROLL - look at the minutesm, "presentations", ...). I was personally =
opposed to see that 6lowpan WG item on routing since by definition =
routing is "agnostic" (not ignorant) to the PHY/MAC. The WG consensus =
was to have this WG item included the charter and consensus wins, which =
is a good thing :-) In its current form, I do not think that the WG ID =
is acceptable and I proposed (with the agreement of the 6lowpan chairs =
and Mark) to propose a new revision so as to clearly state that these =
routing requirement will be 6lowpan specifics. ROL and 6lowpan will =
happily work together on this. Issue closed. Hope this sheds some =
light.</div><div><br></div><div>Now I cannot resist from making a =
general comment here: it is very much welcome to receive comments, =
guidance, ... but please do not re-open debates on which people have =
spent a lot of time and reached consensus. ROLL has been moving fast =
with a lot of energy and time from its active participants and I do not =
want to loose that traction and motion. Hope you =
understand.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>The same kind of argument can be made, let me cite from the MANET =
charter:<br></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"font-size: 16px; "><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" =
style=3D"white-space:pre"><font class=3D"Apple-style-span" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px;">	 =
  "</span></font></span>The purpose of the MANET working group is to =
standardize IP routing</font></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font =
size=3D"5" style=3D"font: 16.0px Times"><font class=3D"Apple-style-span" =
face=3D"Courier"><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span>protocol functionality suitable for wireless routing =
application within<br><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>both static and dynamic =
topologies with increased dynamics due to node<br><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>motion or =
other factors"</font></font></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It does not explicitly enumerate the characteristics of "wireless =
routing", but again the relationship&nbsp;</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>with ROLL isn't =
clear.</div></div></div></blockquote><div><br></div><div>Note that we =
could do a similar exercise with many other WGs.</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I think that this is the =
biggest piece missing from this document -- and I think that =
it's&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a piece of paramount =
importance as well, so I really really think that we need =
to</div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>write up something to clarify =
this.</div><div><br></div></div></div></blockquote><div><br></div><div>The=
 relationship with 6lowpan is fairly clear and ROLL and 6lowpan works in =
concert. The only ambiguity was for the routing requirement ID in =
6lowpan (which is about 6lowpan specific issue) for which I hope I =
clarified the situation. With regards to MANET, this is also fairly =
simple. Should we decide to use a routing protocol of the MANET WG, we =
will be more than happy to work with MANET to provide the requirements =
and get the protocol extensions worked out by the MANET WG. It is that =
simple :-)</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>I still =
see "Criteria" used, and I think that it's not the right term. =
"Evaluation metrics" seems&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>a much more appropriate =
term. I've argued why in my previous review, and so I'll defer =
to&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that for details as to =
why -- but I REALLY do encourage changing the =
term.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>I can say the magic word =
("please"), if it helps any ;)<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>There =
still are a few inconsistencies as to if not attaining a "pass" on all =
the evaluation&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>metrics means that the =
protocol:</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>is not a =
candidate at all<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>cannot be =
used as-is, but may be modified to =
work<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Sections 1 (last =
paragraph), 3.2, 4.0 (2nd paragraph) send slightly different messages as =
to&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		=
</span>this.<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>This ties in with another =
problem, that I just notice right now. Section 1 ends =
with:<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>"Whether or not =
such a protocol involves modifications to an existing</div> <div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; protocol or a new protocol entirely is outside the =
scope of this</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
document: this document simply seeks to answer the question: do =
LLNs</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
		</span>&nbsp;&nbsp; require a new protocol specification =
document at all?"</div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Which I can agree with, =
as such. However 3.2 reads:<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"A protocol that does not meet the criteria cannot be used =
as</div> <div><span class=3D"Apple-tab-span" style=3D"white-space:pre">		=
	</span>&nbsp;&nbsp; specified, but it is possible that a =
protocol meets the criteria yet</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; is =
not able to meet the requirements of a particular application</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; domain.&nbsp; Nevertheless, a protocol that meets =
all of the criteria</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
would be very promising, and deserve a closer look and =
consideration</div> <div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">			</span>&nbsp;&nbsp; in =
light of LLN application domains."</div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>And 4.0:<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>"If a protocol&nbsp;&nbsp;cannot meet even these minimalist =
criteria, then it cannot be used</div> <div><span class=3D"Apple-tab-span"=
 style=3D"white-space:pre">			</span>&nbsp;&nbsp; =
unchanged in several major ROLL application domains and so is</div> =
<div><span class=3D"Apple-tab-span" style=3D"white-space:pre">			=
</span>&nbsp;&nbsp; unlikely to be a good candidate for use."</div> =
<div><br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>The offending bits here =
are the last sentence in the quote from 3.2, and =
the&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>"is unlikely to be a good =
candidate for use" from 4.<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>Now, 1 states that the goal simply is to identify "can an =
existing protocol&nbsp;</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>specification be =
used?".<br></div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>3.2 and 4.0 state, =
essentially, that the document go both beyond and below =
that,<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>by admitting that "no, we =
cannot answer that, the evaluation metrics =
presented&nbsp;<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>do not allow answering =
this question completely" -- and "oh, the document =
also<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>tries to identify =
protocols that could be further =
developed/investigated".<br></div><div><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>In other words, the document sets out to do one thing, then =
doesn't quite do that,&nbsp;<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>but does something else. =
While I am sure that that's not the intent, it could =
be<br></div><div><span class=3D"Apple-tab-span" style=3D"white-space:pre">=
		</span>read as if the document essentially had as =
objective to "dismiss all related IETF work"<br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>-- and I'd really rather that we not be accused of that =
;)<br></div><div><br></div></div></div></blockquote><div><br></div><div>We=
 will address these =
comments.</div></div></div></div></blockquote><div><br></div><div>JP> =
See the new revision and let us know if we addressed your =
comments.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><br><blockquote type=3D"cite"><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>o<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Security<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span><br></div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>It still troubles me a great deal that the "Security =
Considerations" section is<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>intentionally left blank. =
It strikes me that the different protocols discussed =
have<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>different properties with =
respect to how they can be secured -- and that this</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>discussion belongs in this document. If not, then I think the =
rationale as to why</div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>this document does not =
consider security MUST be included in the security</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>considerations =
section.</div><div><br></div></div></div></blockquote><div><br></div><div>=
Just because we looked at the (necessary) but not sufficient =
criteria.</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>Or, if security simply is =
not at all important in ROLL networks, then stating that</div><div><span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>as reason for not discussing security would likely be =
enough?</div><div>&nbsp;</div></div></div></blockquote><div><br></div><div=
>Look at our charter, it is quite critical. But again, if a WG does not =
pass the existing criteria this is enough to =
conclude.</div><div><br></div><div>AGAIN, that does not mean that we =
will not use such a protocol with extensions at all. The question is" =
can we use this</div><div>protocol as-is" ?</div><br><blockquote =
type=3D"cite"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>o<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>I've made some additional =
comments to the evaluation of OLSR as well, I =
encourage<br></div><div><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">		</span>that these be =
considered.<br></div><div><br></div><div>I think that these high-level =
points are important to get straightened out before moving this document =
forward. I see that others have raised issues as well, I'll reply to =
those with my =
comments.</div></div></div></blockquote><div><br></div><div>Hope I =
clarified.</div></div></div></div></blockquote><div><br></div><div>Thanks.=
</div><br><blockquote type=3D"cite"><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</div>=
<br><blockquote type=3D"cite"><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div><br></div><div>Cheers,</div><div><br></div><div>Thomas</div><d=
iv><br></div><div></div></div><span>&lt;draft-ietf-roll-protocols-survey-0=
4_review.pdf></span></div><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div><div></div></div></div></blockquote></div><br></div></div></blockqu=
ote></div><br></div></body></html>=

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Hi Ulrich,

On Jan 22, 2009, at 11:26 AM, Ulrich Herberg wrote:

> Hi,
>
> thanks for submitting the new version of the ID.
> Here my comments:
>
> - Generally, I would prefer to separate the evaluation metrics and  
> the survey of protocols according to these metrics in two different  
> documents. It could be dangerous to mix these two aspects within the  
> same document as the choice of metrics may be influenced by the  
> choice of the protocols to be considered. Also, it would ease the  
> addition of a routing protocol later on without changing the  
> evaluation criteria.
>

As pointed out many times on this mailing list, once re-chartered for  
protocol work, we will have work on protocol specific in light of the  
application specific routing requirements documents, not the protocol  
survey (the aim of which was to see whether or not an existing routing  
protocol could be used as is).

> - Another general remark: I am not sure that this would belong into  
> this ID, but somewhere I would like to see an applicability  
> statement that underlines the differences to MANET and 6lowpan  
> requirements and protocols. For a reader that -- like me -- comes  
> more from the MANET world, it would be good to emphasize why the  
> protocols that work well in MANETs do not work in LLNs. MANETs are  
> not per se limited to high power machines and stable links but may  
> have the same constraints as LLNs.

There is no such WG item. If someone is willing to write such an  
informational document, why not but for the time being this is not  
needed. On the other hand, we may end up writing applicability  
statement to document the use of protocol X in condition Y. But again  
this is premature, we first need to complete the protocol work.

>
>
> - Section 3.1 (Protocols Considered): This is a good new section.  
> However, I would add one or two explaining sentences (or references)  
> to the statement "This document does not consider DTN bundles  
> [RFC5050] or the DTN [...], because they are not routing protocols."  
> As Thomas said, there is no such single unique definition of what a  
> routing protocol is. You could either reference some document(s)  
> with such a definition, or explain what exact criteria does a  
> routing protocol have and why DTN does not meet these requirements.  
> In particular for hierarchical NEMO, you could argue that it *is* a  
> routing protocol, if you consider a definition of a routing protocol  
> being "something that modifies the routing table".
>

I'm not sure that we need to start a debate on what a routing protocol  
is ... at the IETF.

Thanks for the other comments, we should be able to address them in  
rev-05 (this week-end hopefully).

Thanks.

JP.

> - Again Section 3.1: I would change the following sentence: "This  
> document does not seek to answer the question of whether there is  
> any protocol anywhere which could meet LLN application  
> requirements.", to "This document does not seek to answer the  
> question of whether there is any protocol anywhere *outside the  
> IETF* which could meet LLN application requirements.", i.e. add  
> "outside the IETF"
>
> - Section 3.2 (Criteria): Change: these criteria are "necessary but  
> not sufficient." to: these criteria are "necessary but not  
> sufficient".
> (move the full stop towards the end of the sentence)
>
> - Section 4 (Suitability Summary): Personally, I would rename the  
> section title from "Suitability Summary" to "Evaluation  
> Criteria" (maybe section 3.2 Criteria should be renamed to Criteria  
> Selection or something similar). You reference this section from  
> section 3.2 (Criteria) "The five criteria, presented in Section 4  
> [...]". Accordingly, I would prefer to have five subsections with  
> each criterion as one single subsection, i.e. split up "Link and  
> Node Cost" into two subsections. At first, I only counted four  
> criteria before I saw that you combined two within one subsection.
>
> - Section 4.2 (Table Scalability): As Thomas said, it's not only the  
> routing table size that should be bounded, but the complete state of  
> a routing protocol. For example in OLSRv2, there are many different  
> sets (Neighbor Set, Topology Set, Advertised Neighbors Set, ...)  
> that are all part of the state of a router. Otherwise, a routing  
> protocol could "hide" a large part of the state outside the routing  
> table and still fulfill the criterion of a scaled routing table.
>
> - Section 4.4 (Control cost): I know, this has been addressed in my  
> prior email, but I still feel uncomfortable with this section, as it  
> only considers control cost and not the total cost for acquiring the  
> routes *and* for transmitting  data. Even if you say that generally  
> in LLNs the data rate is very low, still I think it would be a  
> fairer criterion to consider the total cost (data + control  
> traffic). As said by Thomas and by me, you could easily design a  
> routing protocol with zero-cost control cost (don't send any control  
> traffic) but a very high data cost (flood the whole network).
>
> - Again Section 4.4: In my opinion, the following paragraph is  
> unnecessary here because it applies for all criteria, not only for  
> control cost:
>    The control cost criterion is a necessary but not sufficient
>    condition for a protocol to be a viable routing protocol for LLNs.
>    Protocols not meeting this bound are unacceptable for use in this
>    environment; however, there may be protocols which receive a "pass"
>    for this criterion and yet are also unsuitable.
>
> - Appendix B: In section 4.1 you mentioned that you use the formal  
> big-O notation. However, in the appendix you use O(R + e) and O(e)  
> with e being a constant. The constant should be removed from within  
> the O().
>
> - As said by others, a Security Considerations section would be a  
> very good thing to include.
>
> Best regards,
> Ulrich
>
>
> Internet-Drafts@ietf.org wrote:
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy  
>> networks Working Group of the IETF.
>>
>> 	Title		: Overview of Existing Routing Protocols for Low Power and  
>> Lossy Networks
>> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
>> 	Filename	: draft-ietf-roll-protocols-survey-04.txt
>> 	Pages		: 25
>> 	Date		: 2009-1-21
>> 	
>> Networks of low power wireless devices introduce novel IP routing
>>    issues.  Low-power wireless devices, such as sensors, actuators  
>> and
>>    smart objects, have difficult constraints: very limited memory,
>>    little processing power, and long sleep periods.  As most of these
>>    devices are battery-powered, energy efficiency is critically
>>    important.  Wireless link qualities can vary significantly over  
>> time,
>>    requiring protocols to make agile decisions yet minimize topology
>>    change energy costs.  Routing over such low power and lossy  
>> networks
>>    has novel requirements that existing protocols may not address.   
>> This
>>    document provides a brief survey of the strengths and weaknesses  
>> of
>>    existing protocols with respect to this class of networks.  From  
>> this
>>    survey it examines whether existing and mature IETF protocols  
>> can be
>>    used without modification in these networks, or whether further  
>> work
>>    is necessary.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-survey-04.txt
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> Below is the data which will enable a MIME compliant mail reader
>> implementation to automatically retrieve the ASCII version of the
>> Internet-Draft.
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi Ulrich,<div><br><div><div>On =
Jan 22, 2009, at 11:26 AM, Ulrich Herberg wrote:</div><br =
class=3D"Apple-interchange-newline"><blockquote type=3D"cite"> <div =
bgcolor=3D"#ffffff" text=3D"#000000"> Hi,<br> <br> thanks for submitting =
the new version of the ID.<br> Here my comments:<br> <br> - Generally, I =
would prefer to separate the evaluation metrics and the survey of =
protocols according to these metrics in two different documents. It =
could be dangerous to mix these two aspects within the same document as =
the choice of metrics may be influenced by the choice of the protocols =
to be considered. Also, it would ease the addition of a routing protocol =
later on without changing the evaluation criteria. <br> =
<br></div></blockquote><div><br></div><div>As pointed out many times on =
this mailing list, once re-chartered for protocol work, we will have =
work on protocol specific in light of the application specific routing =
requirements documents, not the protocol survey (the aim of which was to =
see whether or not an existing routing protocol could be used as =
is).</div><br><blockquote type=3D"cite"><div bgcolor=3D"#ffffff" =
text=3D"#000000"> - Another general remark: I am not sure that this =
would belong into this ID, but somewhere I would like to see an =
applicability statement that underlines the differences to MANET and =
6lowpan requirements and protocols. For a reader that -- like me -- =
comes more from the MANET world, it would be good to emphasize why the =
protocols that work well in MANETs do not work in LLNs. MANETs are not =
per se limited to high power machines and stable links but may have the =
same constraints as LLNs. </div></blockquote><div><br></div><div>There =
is no such WG item. If someone is willing to write such an informational =
document, why not but for the time being this is not needed. On the =
other hand, we may end up writing applicability statement to document =
the use of protocol X in condition Y. But again this is premature, we =
first need to complete the protocol work.</div><br><blockquote =
type=3D"cite"><div bgcolor=3D"#ffffff" text=3D"#000000"><br> <br> - =
Section 3.1 (Protocols Considered): This is a good new section. However, =
I would add one or two explaining sentences (or references) to the =
statement "This document does not consider DTN bundles [RFC5050] or the =
DTN [...], because they are not routing protocols." As Thomas said, =
there is no such single unique definition of what a routing protocol is. =
You could either reference some document(s) with such a definition, or =
explain what exact criteria does a routing protocol have and why DTN =
does not meet these requirements. In particular for hierarchical NEMO, =
you could argue that it *is* a routing protocol, if you consider a =
definition of a routing protocol being "something that modifies the =
routing table". <br> <br></div></blockquote><div><br></div><div>I'm not =
sure that we need to start a debate on what a routing protocol is ... at =
the IETF.&nbsp;</div><div><br></div><div>Thanks for the other comments, =
we should be able to address them in rev-05 (this week-end =
hopefully).</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.<=
/div><br><blockquote type=3D"cite"><div bgcolor=3D"#ffffff" =
text=3D"#000000"> - Again Section 3.1: I would change the following =
sentence: "This document does not seek to answer the question of whether =
there is any protocol anywhere which could meet LLN application =
requirements.", to "This document does not seek to answer the question =
of whether there is any protocol anywhere *outside the IETF* which could =
meet LLN application requirements.", i.e. add "outside the IETF"<br> =
<br> - Section 3.2 (Criteria): Change: <tt>these criteria are "necessary =
but not sufficient."</tt> to: <tt>these criteria are "necessary but not =
sufficient".</tt><br> (move the full stop towards the end of the =
sentence)<br> <br> - Section 4 (Suitability Summary): Personally, I =
would rename the section title from "Suitability Summary" to "Evaluation =
Criteria" (maybe section 3.2 Criteria should be renamed to Criteria =
Selection or something similar). You reference this section from section =
3.2 (Criteria) "The five criteria, presented in Section 4 [...]". =
Accordingly, I would prefer to have five subsections with each criterion =
as one single subsection, i.e. split up "Link and Node Cost" into two =
subsections. At first, I only counted four criteria before I saw that =
you combined two within one subsection.<br> <br> - Section 4.2 (Table =
Scalability): As Thomas said, it's not only the routing table size that =
should be bounded, but the complete state of a routing protocol. For =
example in OLSRv2, there are many different sets (Neighbor Set, Topology =
Set, Advertised Neighbors Set, ...) that are all part of the state of a =
router. Otherwise, a routing protocol could "hide" a large part of the =
state outside the routing table and still fulfill the criterion of a =
scaled routing table. <br> <br> - Section 4.4 (Control cost): I know, =
this has been addressed in my prior email, but I still feel =
uncomfortable with this section, as it only considers control cost and =
not the total cost for acquiring the routes *and* for transmitting&nbsp; =
data. Even if you say that generally in LLNs the data rate is very low, =
still I think it would be a fairer criterion to consider the total cost =
(data + control traffic). As said by Thomas and by me, you could easily =
design a routing protocol with zero-cost control cost (don't send any =
control traffic) but a very high data cost (flood the whole network). =
<br> <br> - Again Section 4.4: In my opinion, the following paragraph is =
unnecessary here because it applies for all criteria, not only for =
control cost:<br> <pre>   The control cost criterion is a necessary but =
not sufficient
   condition for a protocol to be a viable routing protocol for LLNs.
   Protocols not meeting this bound are unacceptable for use in this
   environment; however, there may be protocols which receive a "pass"
   for this criterion and yet are also unsuitable.

</pre> - Appendix B: In section 4.1 you mentioned that you use the =
formal big-O notation. However, in the appendix you use <tt>O(R + =
e)</tt> and <tt>O(e)</tt> with <tt>e</tt> being a constant. The constant =
should be removed from within the O(). <br> <br> - As said by others, a =
Security Considerations section would be a very good thing to =
include.<br> <br> Best regards,<br> Ulrich<br> <br> <br> <a =
class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a> =
wrote: <blockquote cite=3D"mid:20090121231501.7755A3A68E4@core3.amsl.com" =
type=3D"cite">  <pre wrap=3D"">A New Internet-Draft is available from =
the on-line Internet-Drafts=20
directories.
This draft is a work item of the Routing Over Low power and Lossy =
networks Working Group of the IETF.

	Title		: Overview of Existing Routing Protocols for Low =
Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-04.txt
	Pages		: 25
	Date		: 2009-1-21
=09
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  =46rom =
this
   survey it examines whether existing and mature IETF protocols can be
   used without modification in these networks, or whether further work
   is necessary.

A URL for this Internet-Draft is:
<a class=3D"moz-txt-link-freetext" =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-surv=
ey-04.txt">http://www.ietf.org/internet-drafts/draft-ietf-roll-protocols-s=
urvey-04.txt</a>

Internet-Drafts are also available by anonymous FTP at:
<a class=3D"moz-txt-link-freetext" =
href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-d=
rafts/</a>

Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
  </pre>  <pre wrap=3D""><hr size=3D"4" width=3D"90%">
_______________________________________________
Roll mailing list
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  </pre> </blockquote> <br> </div>  =
_______________________________________________<br>Roll mailing =
list<br><a =
href=3D"mailto:Roll@ietf.org">Roll@ietf.org</a><br>https://www.ietf.org/ma=
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Hi Jerry,

On Jan 23, 2009, at 10:29 PM, Jerald.P.Martocci@jci.com wrote:

>
> JP,
>
> Sorry I missed you before your vacation started.  I am emailing it =20
> on Friday as you requested, but I forgot until now you're already =20
> asleep.  So if for some ungodly reason you are reading this during =20
> your vacation please immediately close this file and have fun!!!  I =20=

> can assure you this document will be just as boring to read when you =20=

> return from vacation. :-)

OK I'll make an exception while I'm still on-line ;-)

Thanks for the quick reply to my comments - We just have a very few =20
items to sort out - see in line.

>
>
> I've made most changes as you requested, and noted why i didn't =20
> accept the comments in a few cases.  I will immediately embark on =20
> posting this document as -03.  I have interlaced all the comments =20
> below and attached the .doc file with 'change tracking' turned on so =20=

> you can more readily review the updates.
>
> Regards,
>
> Jerry
>
>
>
>
>
>
> JP Vasseur <jvasseur@cisco.com>
> 01/20/2009 04:22 AM
>
> To
> Jerald.P.Martocci@jci.com, ROLL WG <roll@ietf.org>
> cc
> "David E. Culler" <culler@eecs.berkeley.edu>
> Subject
> Comments on draft-ietf-roll-building-routing-reqs-02.txt
>
>
>
>
>
> Hi,
>
> First of all thanks for the hard work and several revisions =20
> addressing many comments. There are still several comments to address.
>
> Please find below my WG LC comments:
>
> 1) Section 1
>
> "For description of the terminology used in this specification, please
>    see the Terminology ID referenced in Section 10.1. "
> Please add the reference instead of mentioning Section 10.1.
> s/"see the Terminology ID referenced in Section 10.1"/"see [I-D.ietf-=20=

> roll-terminology]"
> done.

OK

>
>
>
> 2) Section 2
> Right after "Sensing devices may be battery or mains powered.  =20
> Actuators and area
>    controllers will be mains powered. "
> Please add: "Still it is envisioned to see a mix of wired and =20
> wireless sensors and actuators in buildings".
> added as noted.
>
>

OK

>
>
> 3) Section 2
> "Facility Management Systems (FMS) are deployed in a large set of
>    vertical markets including universities; hospitals; government
>   facilities; Kindergarten through High School (K-12); pharmaceutical
>   manufacturing facilities; and single-tenant or multi-tenant office
>   buildings."
> JP> Shouldn't you replace the ";" by "," ?
> The nuns taught me that if you have compound items (i.e. 'single-=20
> tenant or multi-tenant)as members of a list, then you use semicolons =20=

> to reduce ambiguity.  I didn't change it, but am not willing to die =20=

> on this mountain.  Let me know if you want commas :-).

This is fine, you are the native English speaker ;-) The RFC editor =20
will catch this if needed.

>
>
> 4) Section 2
> Right after "The following sections describe the sensor, actuator, =20
> area controller
>    and zone controller layers of the topology.  (NOTE: The Building
>   Controller and Enterprise layers of the FMS are excluded from this
>   discussion since they typically deal in communication rates =20
> requiring
>   WLAN communication technologies).  "
> JP> Please add a note to mention that this material is provided =20
> mainly for educational purposes and the routing requirements are =20
> detailed in section 3.
> JP> Then add "The aim of this document is to provide the set of IPv6 =20=

> routing requirements for LLN in buildings".
>
> Text added ...
>
> Section 3 describes FMS architectures commonly installed in =20
> commercial buildings.  Section 4 describes installation methods =20
> deployed for new and remodeled construction.  Appendix B describes =20
> various FMS use-cases and the interaction with humans for energy =20
> conservation and life-safety applications.
> Sections 3, 4, and Appendix B are mainly included for educational =20
> purposes.  The aim of this document is to provide the set of IPv6 =20
> routing requirements for LLNs in buildings as described in Section 5.
>
Thanks.
>
>
> 5) I would suggest a slightly different organization ...
> * Leave the introduction (up to section 2.1 not included) and make =20
> the suggested changes above,
> done
> * Rename section 2.1 (Facility Management System (FMS) Topology ) =3D> =
=20
> Section 3
> done.  I also converted Section 2.2 to Section 4 (Installation =20
> Methods) .
> * Move the current Section 3 to Appendix B ("An example of building =20=

> automation: the art centre of Vooruit". As such it comes a bit out =20
> of the blue.
> done.
>
>
Thanks.
>
> 6) On Section 3 (to become appendix):
> * s/""popcorn effect" draft"/"popcorn effect"
> done
> * There is no word on routing: could you provide some routing =20
> characteristics in this network (number of hops, devices, ...) ?
>
> The routing protocol is not a function of use case, but more a =20
> function of spacial device placement and network anomolies.  Rather =20=

> than add routing information in Appendix B, I have added the =20
> following two paragraphs to the 'Traffic Pattern' section...
>
> Initial system startup after a controlled outage or unexpected power =20=

> failure puts tremendous stress on the network and on the routing =20
> algorithms.  An FMS system is comprised of a myriad of control =20
> algorithms at the room, area, zone, and enterprise layers.  When =20
> these control algorithms are at quiescence, the real-time data =20
> changes are small and the network will not saturate.  However, upon =20=

> any power loss, the control loops and real-time data quickly =20
> atrophy.  A ten minute outage may take many hours to regain control.
>
> Upon restart all lines-powered devices power-on instantaneously.  =20
> However due to application startup and self tests, these devices =20
> will attempt to join the network randomly.  Empirical testing =20
> indicates that routing paths acquired during startup will tend to be =20=

> very oblique since the available neighbor lists are incomplete.  =20
> This demands for an adaptive path protocol to allow for path =20
> optimization as the network stabilizes.
>
Fine text, thanks.

> Comments on the routing requirements
> ################################
>
> 7) "It MUST be possible to fully commission network devices without
>    requiring any additional commissioning device (e.g. laptop). The
>   device MAY support up to sixteen integrated switches to uniquely
>   identify the device on the network. "
> JP> How does the "MAY" translate to routing requirements ?
>
> It's really a commissioning constraint.  The document notes 'zero =20
> commissioning' time.  This requirement further states that the =20
> sensor cannot afford the expense of commissioning beyond that of =20
> setting a switch bank. (This gets back to the abilities of an =20
> electrician and the cost and size of adding too many switches).
>
>
I am fine with the first sentence but I was referring to the second =20
part (MAY). I would strongly suggest to remove the second sentence =20
(The device MAY support up to sixteen ...". This is way too specific. =20=

Thanks.
>
> 8) Please reword "Routing
>    MUST recognize the constraints associated the power budget of such
>   low duty cycle devices."
> The routing protocol MUST take into account device characteristics =20
> such as "power budget".
> Done.
>
>
OK
>
> 9) "If the mechanisms for duty cycling dictate very long response =20
> times or specific temporal
>    scheduling, routing and forwarding will need to take such =20
> constraints
>   into account. "
> JP> Please remove "forwarding"
> Done.
>
>
OK
>
> 10) "Communication to these mostly sleeping devices MUST be =20
> bidirectional."
> JP> Please be more specific. Do you mean by the routing protocol =20
> MUST be able to compute bi-directional route to sleeping devices ? =20
> Why ?
> Yes and No.  You're actually asking two questions in your question...
>
>
Yes we leave in a constrained environment ;-))
> With regard to sleeping devices, the routing protocol must allow for =20=

> delivering messages to an assigned (awake) proxy device who will =20
> later transmit the information to the sleeping device upon its =20
> awaking.  I've actually addressed this as a separate requirement.
>
>
Indeed.
> With regard to bidirectionality, I am simply saying that sensors =20
> must be able to receive application ACKs and other configuration =20
> data from its controller.  Some protocols (such as EnOcean) support =20=

> only unidirectional messaging from the sensor to the controller.  =20
> This might work for a lightweight application such as a wireless =20
> light switch turning on a light, but will not work for most of the =20
> commercial applications where the sensor must know that the packet =20
> has been successfully transmitted to the controller (say in a Fire =20
> application).
>
>
Which does not necessarily mean a bi-directional route though. As you =20=

know most of routing protocols are computing unidirectional routes =20
(fortunately!)

> I've changed the text to read ...
>
> Communication to  sleeping devices MUST be bidirectional to allow =20
> for guaranteed packet delivery from the sensor to the controller.
>
Which is clearer but I still have an issue since this is a routing =20
requirement. I do not think that you require the routing protocol to =20
compute bi-directional routes. I understand that the communication =20
must be bi-directional thus this does not add any routing requirements =20=

in addition to being able to compute routes from a node A to a node B =20=

(and vice versa of course). Thus this sentence can be deleted, it is =20
already covered.
>
>
> 11) "In such cases, routing MUST recognize the selected proxy
>    for the sleeping device. "
> JP> "recognize" in which way ? Can you be more specific ?
> This is actually an implementation issue which arguably may not be =20
> the province of the routing protocol.
>
This is where I was going ...
> As I just mentioned above, sleeping devices must have a mechanism to =20=

> receive packets.  However since they sleep the vast majority of the =20=

> time, they will need a proxy device to hold the packet until the =20
> next awake cycle.  The question is which layer must be cognizant of =20=

> the proxy device.  The APP layer could do it, but it would need to =20
> constantly be checking to see if the proxy device has changed.  I =20
> would prefer that the routing layer recognize that the destination =20
> address is for a sleeping device and reroute the packet to its =20
> assigned proxy with forwarding information added to its sleeping =20
> device.
>
> The text now reads ...
>
> In such cases, the routing protocol MUST recognize the assigned =20
> proxy for the sleeping device; deliver the packet to the assigned =20
> proxy for later delivery to the sleeping device upon its next awake =20=

> cycle.
>
Slight disagreement here ...

Several cases:
1) You consider this an an application issue: then reword the text by =20=

mentioning the functionality as an application issue and remove the =20
"MUST" or simply remove the sentence.
2) You want to influence the routing decision to traverse the proxy. =20
This is fine and you should reword the text this way: "The routing =20
protocol MUST discover the capability of a node to act as a proxy =20
during path calculation".
3) You want to change IP routing (which is based on the destination =20
and other criteria) and swap destination address ... I guess this is =20
not what you propose.
>
> 12) "Routing must allow for temporary ad hoc paths to be
>    established that are updated as the network physically and
>   functionally expands. "
> JP> This can be a very stringent requirements (although there is no =20=

> normative language).
>
> This is more an implementation item.  Here the idea is that when =20
> performing initial room level testing, there needs to be some simple =20=

> network that can be formed to verify local operation (not unlike =20
> 802.11 Ad Hoc mode or 802.3 crossover cable).  I actually don't want =20=

> to foist normative language onto the implementers.  I changed the =20
> 'must' to 'should' in the text.
>
>
OK
> 13) Section 4.1.4: not a routing requirements
>
> I disagree.  Device replacement must have zero configuration and =20
> immediately join the network as does a new device.  The installer =20
> can't wait around for a 1/2 hour until the ARP tables flush and the =20=

> new MAC address be recognized.  Because the new device will =20
> necessarily have a new MAC, the routing protocol will somehow have =20
> to deal with routing without using MAC addressing.  To me, the text =20=

> as drafted is clear in this regard.  Let me know if I need more =20
> clarity to better express my point.
>
>
In the text you are referring to IP address assignment, use of MAC =20
address, ... these are all IP-related issues (not routing !). The =20
routing relates issue is covered in 4.1.1
>
> 14) Section 4.2
> "The routing protocol MUST be able to support networks with at least
>    1000 routers and 1000 hosts. "
> If a host is not "routing" no need to mention the number of hosts. =20
> What matters in this section is the number of routers in the LLN. =20
> Same comments for the number of sensors.
>
> I think we have a nomenclature issue here.  What I am trying to say =20=

> is that a network (PAN) needs to support at least 1000 powered =20
> application devices that can also act as routers.  The PAN must =20
> additionally support 1000 sleeping devices which typically have no =20
> routing capability.  I would think all 2000 of these devices would =20
> be termed 'hosts' in the IT parlance.  I am in no way thinking that =20=

> there are application hosts that don't route and then traditional =20
> standalone routers in the WPAN.  The routing protocol needs to be =20
> software that resides within the application device.
>
> I changed the nomenclature to reference 'hosts' and 'routers' at =20
> David's request on the last version.  I probably bolixed it up!!!  =20
> Please help me draft this requirement so it's clear for the IETF =20
> reader.
>
> I changed the text to read ...
>
> The routing protocol MUST be able to support networks with at least =20=

> 2000 nodes supporting at least 1000 routing devices and 1000 =20
> nonrouting device.
>
Good, thanks.
>
>
> 15) Section 4.3
> "Mobile devices SHOULD be capable of unjoining (handing-off) from an
>    old network joining onto a new network within 15 seconds.
>
> "
> JP> You may want to elaborate a little bit on hat you mean by =20
> "unjoining". Does that mean that the routing protocol must converge =20=

> within 15s after the removal of the device ?
>
>
>

?
>
> 16) "The routing mechanisms MUST
>    therefore be tailored to fit these resource constrained devices.  "
> JP> This is certainly true but how does this translate to a routing =20=

> requirement ? 10000 times less memory than a several GBytes =20
> routers ? Since you provide number hereafter, please delete this =20
> sentence.
>
> Section 5.4 is a brief introduction of the section upon which the =20
> requirements are then stated in Sections 5.4.1 and 5.4.2.  I agree =20
> that I should not therefore be putting normative requirements in the =20=

> introductory section.  What I did is change the 'MUST' to a 'must' =20
> thereby making the intro only informative.
>
>
Good.
>
> 17) In Sections 4.4.1 and 4.4.2, what do you mean by "software =20
> stack": OS+entire protocol stack ?
> Yes, the entire operating environment other than the end-=20
> application.   I changed these paragraphs to read ...
>
> 5.4.1.         Limited Processing Power for Non-routing Devices.
> The software size requirement for non-routing devices (e.g. sensors =20=

> and actuators) MUST be implementable in 8-bit devices with no more =20
> than 128KB of flash memory (including at least 32KB for the =20
> application code) and no more than 8KB of RAM (including at least =20
> 1KB RAM available for the application).
>
> 5.4.2.         Limited Processing Power for Routing Devices
> The software size requirements for routing devices (e.g. room =20
> controllers) SHOULD be implementable in 8-bit devices with no more =20
> than 256KB of flash memory (including at least 32KB for the =20
> application code) and no more than 8KB of RAM (including at least =20
> 1KB RAM available for the application).
>
But you see the issue ... since you enter in some implementation =20
issue, what if the OS+infra+... code takes 99% of the RAM/Flash. What =20=

do I have left for the routing component. My strong suggestion here =20
would be to use non normative language, usually not a good idea to =20
indicate numbers with normative language in IETF I-D (think if the =20
authors of RFC791 had done this !).
>
> 18) "Routing MUST support anycast, unicast, multicast and broadcast
>    services (or IPv6 equivalent). "
> JP> This must be changed ... there is no broadcast in IPv6 (and we =20
> are exclusively working on IPv6) but IPv6 is using multicast =20
> (RFC2373). Just remove "broadcast".
> done.   I presume that there is a form of multicast that will =20
> deliver a discovery packet to every node on the subnetwork.
>
Yes:-) Thanks.
>  BACnet requires a network wide broadcast to discover nodes and =20
> objects anywhere on the internetwork.  It has intrinsic support for =20=

> unicasting across subnetworks.
>
> 19) "4.6.1. Firmware Upgrades
>
>   To support high speed code downloads, routing MUST support =20
> transports
>   that provide parallel downloads to targeted devices yet guarantee
>   packet delivery. "
> JP> This is clearly a device requirement not a routing requirements. =20=

> I would suggest to delete.
>
> I'm not willing to give in on this one.  I agree that as stated this =20=

> is more of an implementation approach (i.e. how to do it) rather =20
> than a requirement (i.e. what needs to be done).  The point I am =20
> trying to make is that firmware upgrades must be very fast to not =20
> lose building control.   This has been implemented by supporting QoS =20=

> and a special version of multicast (end of transmission ACKs) that =20
> allows all devices to be downloaded in parallel yet guarantee =20
> delivery.
>
>
It depends of what you mean by "parallel" downloads. If you refer to =20
the ability of the application to handle two parallel streams please =20
delete. If you want to routing protocol to provide two parallel =20
potential disjoint paths then clarify and keep.

>
> 20) "4.6.2. Diagnostics
>
>   To improve diagnostics, the network layer SHOULD be able to be =20
> placed
>   in and out of 'verbose' mode.  Verbose mode is a temporary debugging
>   mode that provides additional communication information including at
>   least total number of packets sent, packets received, number of
>   failed communication attempts, neighbor table and routing table
>   entries. "
> JP> This is an important requirement. Please just keep the routing =20
> aspects.
> Not sure if you're asking for some deletion. no change to text.
>
>
I am proposing to keep the text related to routing (and remove the non =20=

routing piece): the text should read:

> To improve diagnostics, the network layer SHOULD be able to be placed
>   in and out of 'verbose' mode.  Verbose mode is a temporary debugging
>   mode that provides additional communication information including at
>   least total number of routing packets sent and received, number of
>   routing failure (no route available), neighbor table and routing =20
> table
>   entries.

But the total number of packet sent out of an interface is not a =20
routing requirements.
>
>
> 21) "4.6.3. Route Tracking
>
>   Route diagnostics SHOULD be supported providing information such as
>   path quality; number of hops; available alternate active paths with
>   associated costs. "
> JP> Please define "path quality".
>
> Whatever means we employ to select one path over other paths.  In =20
> debugging, it's sometime unclear why one path is selected in lieu of =20=

> other paths.  This info should be available.
>
> I added the sentence...
>
> Path quality is the relative measure of =91goodness=92 of the selected =
=20
> source to destination path as compared to alternate paths.  This  =20
> composite value may be measured as a function of hop count, signal =20
> strength, available power, existing active paths or any other =20
> criteria deemed by ROLL as the path cost differentiator.
>
>
>
Good.
> 22) Section 4.7
> JP> I understand your concern but this is not a routing requirement =20=

> either. The IETF specifies IP-based protocol and cannot depend on =20
> non-IP protocols. I would suggest to remove that section.
> BACnet is an application protocol that sits atop of UDP.  Hence it =20
> is an IP protocol!!!.
>

Although they are routing on top of IP using IP as layer 2 (but this =20
is another discussion).
> To me, this is no different than assuring that ROLL/6LoWPAN supports =20=

> FTP.
> I don't know if LON has intrinsic IP support.  I will drop the LON =20
> requirement.  The text now reads ...
>
> The building automation industry adheres to BACnet, a UDP/IP =20
> application layer protocol, to achieve vendor interoperability.  It =20=

> is estimated that fully 80% of customer bid requests received world-=20=

> wide will require compliance to this ISO standard within five =20
> years.  ROLL routing SHOULD support this application protocol to =20
> assure acceptance in the building automation industry.
>
We cannot keep that text. What does it mean "ROLL SHOULD support this =20=

application ?". ROLL will specific a routing protocol in LLN. Any IP-=20
based application will be supported if it relies on IP. This is the =20
beauty of layering.
>
>
>
> 23) Section 4.7.1
> Per our charter, we exclusively focus on IPv6. Furthermore, the term =20=

> intercommunication is ambiguous. I would suggest to delete 4.7.1
> I  moved this requirement to Appendix A as being out of scope for =20
> ROLL.  However, the FMS industry has been installing IPv4 devices =20
> into buildings for at least 10 years.  These devices have a lifetime =20=

> of at least 25 years and will need to communicate to newer devices.  =20=

> If we (the IETF) don't provide a seamless interface across IPv4 and =20=

> IPv6 we can expect little interest in this market.
>
Good that you moved to the appendix. yes there are already defined =20
mechanism between v4 and v6.
>
>
> 24) Section 4.7.2
> "Routing MUST support packet sizes to 1526 octets (to be backwards
>    compatible with 802.3 subnetworks) "
> JP> Please remove the text in parenthesis. Strictly speaking the =20
> ROLL protocol(s) will not be backward compatible with 802.3.
> Done.
>

OK
>
>
> 25) "Route discovery occurring during packet
>    transmission MUST not exceed 120 msecs."
> JP> I would suggest to slightly reword since it gives the impression =20=

> that you mandate a reactive routing mechanism.
> I tried to clarify the need and changed the MUST to SHOULD.  It now =20=

> reads ...
>
> Route discovery occurring during packet transmission SHOULD not add =20=

> more than 120 msecs latency to the packet mean delivery time.
>
>
>
Still implicitly implying reactive routing. I would suggest "If route =20=

discovery occurs during packet transmission time, it SHOULD NOT add =20
more than 120ms of latency to the packet delivery time".
>
> 26) "4.8.5. Route Preference
>
>   The route discovery mechanism SHOULD allow a source node (sensor) to
>   dictate a configured destination node (controller) as a preferred
>   routing path. "
> JP> mmm ... what do you mean by "dictate a configured destination =20
> node as a preferred path ?". Do you mean that the routing protocol =20
> SHOULD allow for routing along a configured path on the source ?
> The word 'dictate' is probably too strong.  Maybe 'suggest' would be =20=

> better.  What I'm trying to note is that many FMS applications have =20=

> apriori knowledge of the spatial placement of the client and server =20=

> devices.  Yet the 'route cost' algorithms don't  account for this =20
> knowledge in the costing algorithm calculations.  As an example, a =20
> room temperature sensor and its associated room controller are =20
> always within point-to-point distance.  Yet empirical data shows =20
> that many times the path will have additional hops.  The added =20
> latency of a couple additional hops isn't at issue.  It's just the =20
> extra load on the network to hop across extraneous devices.
>
> I changed the text to read ...
>
> Route cost algorithms SHOULD allow the installer to optionally =20
> select 'preferred' paths based on the known spatial layout of the =20
> communicating devices.
>
>
>
OK
> 27) "4.8.6. Path Persistence
>
>   To eliminate high network traffic in power-fail or brown-out
>   conditions previously established routes SHOULD be remembered and
>   invoked prior to establishing new routes for those devices =20
> reentering
>   the network. "
> JP> This is a device / implementation-specific choice. Should be =20
> removed.
> I disagree.  We're dealing with a LLNs that can ill-afford to have =20
> hundreds of nodes simultaneously purge their neighbor lists and =20
> routing tables just because of a 1 second brownout!  I think at some =20=

> point the IETF has to take into account that LLNs are very limited =20
> data highways and mandate certain operational modes.
>
>
I do not disagree with the importance of the requirements and we =20
cannot prevent people from wrong implementation.
Clearly we cannot keep that MUST here, this is pure implementation =20
issue and cannot stay in the document.
>
> 28) Please remove Section 6
> Hmmm,  little confused here since prior comments changed the section =20=

> numbers.  I am assuming this comment references the 'Open Issues' =20
> section.  I've deleted that section.
>
>
Yes indeed. Thanks.
>
> 29) Security.
> JP> Don't you have any security requirements ? Could you please look =20=

> at:
> =
http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-reqs-03.=
txt
> =
http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-reqs-03.=
txt
> =
http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routing-reqs-06.t=
xt
> to see if you do not have security requirements along those lines ?
>
> Yes.  My first draft had 10 pages of security requirements!  =20
> However, we deemed them out of scope since these requirements do not =20=

> affect routing.  What we seemed to agree to in the email exchanges =20
> is that a node must be trusted (and possibly authenticated) upon =20
> joining the network, but once a trusted node joins the network, it =20
> can move packets across the network unimpeded by security concerns.
>
> The text now reads ...
>
> 7.         Security Considerations
>
> Security policies, especially wireless encryption and device =20
> authentication needs to be considered, especially with concern to =20
> the impact on the processing capabilities and additional latency =20
> incurred on the sensors, actuators and controllers.
>
> FMS systems are typically highly configurable in the field and hence =20=

> the security policy is most often dictated by the type of building =20
> to which the FMS is being installed.   Single tenant owner occupied =20=

> office buildings installing lighting or HVAC control are candidates =20=

> for implementing low or even no security on the LLN.  =20
> Antithetically, military or pharmaceutical facilities require strong =20=

> security policies.  As noted in the installation procedures above, =20
> security policies must be facile to allow no security during the =20
> installation phase (prior to building occupancy), yet easily raise =20
> the security level network wide during the commissioning phase of =20
> the system.
>
> 7.1.         Security Requirements
> 7.1.1.         Authentication
> Authentication MUST be optional on the LLN.  Authentication MUST be =20=

> fully configurable on-site. Authentication policy and updates MUST =20
> be transmittable over-the-air.  Authentication MUST occur upon =20
> joining or rejoining a network.  However, once authenticated devices =20=

> SHOULD not need to reauthenticate themselves with any other devices =20=

> in the LLN.
>
> 7.1.2.         Encryption
> 7.1.2.1.         Encryption Levels
> Encryption MUST be optional on the LLN.  Encryption MUST be fully =20
> configurable on-site.
>
=3D> See this is another implementation issue.

> Encryption policy and updates MUST be transmittable over-the-air and =20=

> in-the-clear.
>
> 7.1.2.2.         Security Policy Flexibility
> In most facilities authentication and encryption will be turned off =20=

> during installation.
>
> More complex encryption policies might be put in force at =20
> commissioning time.  New encryption policies MUST be allowed to be =20
> presented to all devices in the LLN over the network without needing =20=

> to visit each device.
>
> 7.1.2.3.         Encryption Types
> Data encryption of packets MUST optionally be supported by use of =20
> either a network wide key and/or application key.    The network key =20=

> would apply to all devices in the LLN.  The application key would =20
> apply to a subset of devices on the LLN.
>
> The network key and application keys would be mutually exclusive.  =20
> Forwarding devices in the mesh MUST be able to forward a packet =20
> encrypted with an application key without needing to have the =20
> application key.
>
> 7.1.2.4.         Packet Encryption
> The encryption policy MUST support encryption of the payload only or =20=

> the entire packet.  Payload only encryption would eliminate the =20
> decryption/re-encryption overhead at every hop.
>
> 7.1.3.         Disparate Security Policies
> Due to the limited resources of an LLN, the security policy defined =20=

> within the LLN MUST be able to differ from that of the rest of the =20
> IP network within the facility yet packets MUST still be able to =20
> route to or through the LLN from/to these networks.
>
>

Please just add "Routing" whenever appropriate to show that this is =20
not applicable to all traffic in this particular document.

>
>
> 30) Please remove (see comments number 32 below)
>     See Appendix A for additional requirements
>   that have been deemed outside the scope of this document yet will
>   pertain to the successful deployment of building automation systems.
> See below
>
> 31) References
>
> Please reformat the references section to list the relevant details =20=

> of each document + add a normative reference to RFC 2119.
> Done.
>
> For example:
>
> 10.  References
>
> 10.1.  Normative References
>
>   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
>              Requirement Levels", BCP 14, RFC 2119, March 1997.
>
> 10.2.  Informative References
>
>   [I-D.ietf-roll-home-routing-reqs]
>              Brandt, A., Buron, J., and G. Porcu, "Home Automation
>              Routing Requirements in Low Power and Lossy Networks",
>              draft-ietf-roll-home-routing-reqs-06 (work in progress),
>              November 2008.
>
>

Thanks.

> 32) Appendix A
> The requirements will need to
>   be addressed by ROLL or other WGs before adoption by the building
>   automation industry will be considered.
> JP> Please remove, since ROLL is about routing, thus we will not be =20=

> chartered to address non routing requirements.
> Giving more thoughts, this appendix does provide very useful and =20
> well documented data. That being said, they do not really belong to =20=

> this document and may introduce confusion. I would suggest to remove =20=

> this appendix from the document.
>
> In my mind the requirements noted in  Appendix A are as important to =20=

> the successful deployment of IP wireless sensor networks than most =20
> of those still in the body of the document.  It's only because of =20
> the compartmentalized nature of the IETF that you feel they are out =20=

> of scope.  I think it's very important that we continue to look at =20
> the requirement set holistically even if our current mission is more =20=

> tightly focused.  I would like to leave Appendix A included in this =20=

> document.
>
>
>
OK let's keep it there and we will see during IESG review whether we =20
need to remove it.

Thanks to incorporate in rev03 and wait before posting until end of LC =20=

on January 30 at 9:00am to address potentially other comments.

Thanks.

JP.

>
>
>
> Thanks.
>
> JP.
>
>
> Begin forwarded message:
>
> From: Internet-Drafts@ietf.org
> Date: January 15, 2009 12:00:02 AM CEST
> To: i-d-announce@ietf.org
> Cc: roll@ietf.org
> Subject: [Roll] I-D Action:draft-ietf-roll-building-routing-=20
> reqs-02.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts =20
> directories.
> This draft is a work item of the Routing Over Low power and Lossy =20
> networks Working Group of the IETF.
>
>
> Title           : Building Automation Routing Requirements in Low =20
> Power and Lossy Networks
> Author(s)       : J. Martocci, et al.
> Filename        : draft-ietf-roll-building-routing-reqs-02.txt
> Pages           : 27
> Date            : 2009-01-14
>
> The Routing Over Low power and Lossy network (ROLL) Working Group has
> been chartered to work on routing solutions for Low Power and Lossy
> networks (LLN) in various markets: Industrial, Commercial (Building),
> Home and Urban. Pursuant to this effort, this document defines the
> routing requirements for building automation.
>
> Requirements Language
>
> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
> document are to be interpreted as described in RFC-2119.
>
> A URL for this Internet-Draft is:
> =
http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routing-reqs-=
02.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> Below is the data which will enable a MIME compliant mail reader
> implementation to automatically retrieve the ASCII version of the
> Internet-Draft._______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>
> [attachment "mime-attachment" deleted by Jerald P Martocci/CORP/=20
> Johnson_Controls]
> <draft-ietf-roll-building-routing-=20
> reqs-03.doc>_______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">Hi Jerry,<div><br><div><div>On =
Jan 23, 2009, at 10:29 PM, <a =
href=3D"mailto:Jerald.P.Martocci@jci.com">Jerald.P.Martocci@jci.com</a> =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b>JP, </b></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b>Sorry I missed you before your =
vacation started. &nbsp;I am emailing it on Friday as you requested, but =
I forgot until now you're already asleep. &nbsp;So if for some ungodly =
reason you are reading this during your vacation please immediately =
close this file and have fun!!! &nbsp;I can assure you this document =
will be just as boring to read when you return from vacation. =
:-)</b></font> </blockquote><div><br></div><div>OK I'll make an =
exception while I'm still on-line ;-)</div><div><br></div><div>Thanks =
for the quick reply to my comments - We just have a very few items to =
sort out - see in line.</div><br><blockquote type=3D"cite"><br> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b>I've made =
most changes as you requested, and noted why i didn't accept the =
comments in a few cases. &nbsp;I will immediately embark on posting this =
document as -03. &nbsp;I have interlaced all the comments below and =
attached the .doc file with 'change tracking' turned on so you can more =
readily review the updates.</b></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b>Regards,</b></font> <br> <br><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b>Jerry</b></font> <br> =
<br> <br> <br> <br> <br> <br> <table width=3D"100%"> <tbody><tr =
valign=3D"top"> <td width=3D"40%"><font size=3D"1" =
face=3D"sans-serif"><b>JP Vasseur &lt;<a =
href=3D"mailto:jvasseur@cisco.com">jvasseur@cisco.com</a>></b> =
</font><p><font size=3D"1" face=3D"sans-serif">01/20/2009 04:22 =
AM</font> </p></td><td width=3D"59%"> <table width=3D"100%"> <tbody><tr =
valign=3D"top"> <td> <div align=3D"right"><font size=3D"1" =
face=3D"sans-serif">To</font></div> </td><td><font size=3D"1" =
face=3D"sans-serif"><a =
href=3D"mailto:Jerald.P.Martocci@jci.com">Jerald.P.Martocci@jci.com</a>, =
ROLL WG &lt;<a href=3D"mailto:roll@ietf.org">roll@ietf.org</a>></font> =
</td></tr><tr valign=3D"top"> <td> <div align=3D"right"><font size=3D"1" =
face=3D"sans-serif">cc</font></div> </td><td><font size=3D"1" =
face=3D"sans-serif">"David E. Culler" &lt;<a =
href=3D"mailto:culler@eecs.berkeley.edu">culler@eecs.berkeley.edu</a>></fo=
nt> </td></tr><tr valign=3D"top"> <td> <div align=3D"right"><font =
size=3D"1" face=3D"sans-serif">Subject</font></div> </td><td><font =
size=3D"1" face=3D"sans-serif">Comments on =
draft-ietf-roll-building-routing-reqs-02.txt</font></td></tr></tbody></tab=
le> <br> <table> <tbody><tr valign=3D"top"> <td> =
</td><td></td></tr></tbody></table> <br></td></tr></tbody></table> <br> =
<br> <br><font size=3D"3">Hi,</font> <br> <br><font size=3D"3">First of =
all thanks for the hard work and several revisions addressing many =
comments. There are still several comments to address.</font> <br> =
<br><font size=3D"3">Please find below my WG LC comments:</font> <br> =
<br><font size=3D"3">1) Section 1</font> <br> <br><font size=3D"3">"For =
description of the terminology used in this specification, please =
</font> <br><font size=3D"2"><tt>&nbsp; &nbsp;see the Terminology ID =
referenced in Section 10.1. "</tt></font> <br><font size=3D"2"><tt>Please =
add the reference instead of mentioning Section 10.1.</tt></font> =
<br><font size=3D"2"><tt>s/"see the Terminology ID referenced in Section =
10.1"/"see [I-D.ietf-roll-terminology]"</tt></font> <br><font size=3D"2" =
color=3D"blue"><tt><b><i>done.</i></b></tt></font> =
</blockquote><div><br></div><div>OK</div><br><blockquote =
type=3D"cite"><br> <br> <br><font size=3D"2"><tt>2) Section =
2</tt></font> <br><font size=3D"2"><tt>Right after "Sensing devices may =
be battery or mains powered. &nbsp;Actuators and area </tt></font> =
<br><font size=3D"2"><tt>&nbsp; &nbsp;controllers will be mains powered. =
"</tt></font> <br><font size=3D"2"><tt>Please add: "Still it is =
envisioned to see a mix of wired and wireless sensors and actuators in =
buildings".</tt></font> <br><font size=3D"2" =
color=3D"blue"><tt><b><i>added as noted.</i></b></tt></font> <br> <br> =
<br></blockquote><div><br></div><div>OK</div><br><blockquote =
type=3D"cite"> <br> <br><font size=3D"2"><tt>3) Section 2</tt></font> =
<br><font size=3D"2"><tt>"Facility Management Systems (FMS) are deployed =
in a large set of </tt></font> <br><font size=3D"2"><tt>&nbsp; =
&nbsp;vertical markets including universities; hospitals; government =
<br> &nbsp; facilities; Kindergarten through High School (K-12); =
pharmaceutical <br> &nbsp; manufacturing facilities; and single-tenant =
or multi-tenant office <br> &nbsp; buildings."</tt></font> <br><font =
size=3D"2"><tt>JP> Shouldn't you replace the ";" by "," ?</tt></font> =
<br><font size=3D"2" color=3D"blue"><tt><b><i>The nuns taught me that if =
you have compound items (i.e. 'single-tenant or multi-tenant)as members =
of a list, then you use semicolons to reduce ambiguity. &nbsp;I didn't =
change it, but am not willing to die on this mountain. &nbsp;Let me know =
if you want commas =
:-).</i></b></tt></font></blockquote><div><br></div><div>This is fine, =
you are the native English speaker ;-) The RFC editor will catch this if =
needed.</div><br><blockquote type=3D"cite"> <br> <br><font =
size=3D"2"><tt>4) Section 2</tt></font> <br><font size=3D"2"><tt>Right =
after "The following sections describe the sensor, actuator, area =
controller </tt></font> <br><font size=3D"2"><tt>&nbsp; &nbsp;and zone =
controller layers of the topology. &nbsp;(NOTE: The Building <br> &nbsp; =
Controller and Enterprise layers of the FMS are excluded from this <br> =
&nbsp; discussion since they typically deal in communication rates =
requiring <br> &nbsp; WLAN communication technologies). =
&nbsp;"</tt></font> <br><font size=3D"2"><tt>JP> Please add a note to =
mention that this material is provided mainly for educational purposes =
and the routing requirements are detailed in section 3.</tt></font> =
<br><font size=3D"2"><tt>JP> Then add "The aim of this document is to =
provide the set of IPv6 routing requirements for LLN in =
buildings".</tt></font> <br> <br><font size=3D"2" =
color=3D"blue"><tt><b><i>Text added ...</i></b></tt></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>Section 3 =
describes FMS architectures commonly installed in commercial buildings. =
&nbsp;Section 4 describes installation methods deployed for new and =
remodeled construction. &nbsp;Appendix B describes various FMS use-cases =
and the interaction with humans for energy conservation and life-safety =
applications. &nbsp;</i></b></font><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>Sections 3, 4, and Appendix B are mainly =
included for educational purposes. &nbsp;The aim of this document is to =
provide the set of IPv6 routing requirements for LLNs in buildings as =
described in Section =
5.</i></b></font></p></blockquote><div>Thanks.</div><blockquote =
type=3D"cite"><p> </p><p> <br> <br><font size=3D"3">5) I would suggest a =
slightly different organization ...</font> <br><font size=3D"3">* Leave =
the introduction (up to section 2.1 not included) and make the suggested =
changes above,</font> <br><font size=3D"2" =
color=3D"blue"><b><i>done</i></b></font> <br><font size=3D"3">* Rename =
section 2.1 (Facility Management System (FMS) Topology ) =3D> Section =
3</font> <br><font size=3D"2" color=3D"blue"><b><i>done. &nbsp;I also =
converted Section 2.2 to Section 4 (Installation Methods) =
.</i></b></font> <br><font size=3D"3">* Move the current Section 3 to =
Appendix B ("An example of building automation: the art centre of =
Vooruit". As such it comes a bit out of the blue.</font> <br><font =
size=3D"2" color=3D"blue"><b><i>done. &nbsp;</i></b></font> <br> =
<br></p></blockquote><div>Thanks.</div><blockquote type=3D"cite"><p> =
<br><font size=3D"3">6) On Section 3 (to become appendix):</font> =
<br><font size=3D"3">* s/""popcorn effect" draft"/"popcorn =
effect"</font> <br><font size=3D"2" =
color=3D"blue"><b><i>done</i></b></font> <br><font size=3D"3">* There is =
no word on routing: could you provide some routing characteristics in =
this network (number of hops, devices, ...) ?</font> <br> <br><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>The routing protocol =
is not a function of use case, but more a function of spacial device =
placement and network anomolies. &nbsp;Rather than add routing =
information in Appendix B, I have added the following two paragraphs to =
the 'Traffic Pattern' section...</i></b></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>Initial system startup after a =
controlled outage or unexpected power failure puts tremendous stress on =
the network and on the routing algorithms. &nbsp;An FMS system is =
comprised of a myriad of control algorithms at the room, area, zone, and =
enterprise layers. &nbsp;When these control algorithms are at =
quiescence, the real-time data changes are small and the network will =
not saturate. &nbsp;However, upon any power loss, the control loops and =
real-time data quickly atrophy. &nbsp;A ten minute outage may take many =
hours to regain control.</i></b></font> </p><p><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>Upon restart all lines-powered =
devices power-on instantaneously. &nbsp;However due to application =
startup and self tests, these devices will attempt to join the network =
randomly. &nbsp;Empirical testing indicates that routing paths acquired =
during startup will tend to be very oblique since the available neighbor =
lists are incomplete. &nbsp;This demands for an adaptive path protocol =
to allow for path optimization as the network =
stabilizes.</i></b></font></p></blockquote><div>Fine text, =
thanks.</div><br><blockquote type=3D"cite"><p> </p><p><font =
size=3D"3">Comments on the routing requirements</font> <br><font =
size=3D"3">################################</font> <br> <br><font =
size=3D"3">7) "It MUST be possible to fully commission network devices =
without </font> <br><font size=3D"2"><tt>&nbsp; &nbsp;requiring any =
additional commissioning device (e.g. laptop). The <br> &nbsp; device =
MAY support up to sixteen integrated switches to uniquely <br> &nbsp; =
identify the device on the network. "</tt></font> <br><font =
size=3D"2"><tt>JP> How does the "MAY" translate to routing requirements =
?</tt></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>It's really a commissioning constraint. =
&nbsp;The document notes 'zero commissioning' time. &nbsp;This =
requirement further states that the sensor cannot afford the expense of =
commissioning beyond that of setting a switch bank. (This gets back to =
the abilities of an electrician and the cost and size of adding too many =
switches).</i></b></font> <br> <br></p></blockquote><div>I am fine with =
the first sentence but I was referring to the second part (MAY). I would =
strongly suggest to remove the second sentence (The device MAY support =
up to sixteen ...". This is way too specific. Thanks.</div><blockquote =
type=3D"cite"><p> <br><font size=3D"2"><tt>8) Please reword "Routing =
</tt></font> <br><font size=3D"2"><tt>&nbsp; &nbsp;MUST recognize the =
constraints associated the power budget of such <br> &nbsp; low duty =
cycle devices."</tt></font> <br><font size=3D"2"><tt>The routing =
protocol MUST take into account device characteristics such as "power =
budget".</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Done.</i></b></font> <br> =
<br></p></blockquote>OK<br><blockquote type=3D"cite"><p> <br><font =
size=3D"2"><tt>9) "If the mechanisms for duty cycling dictate very long =
response times or specific temporal </tt></font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;scheduling, routing and forwarding will need =
to take such constraints <br> &nbsp; into account. "</tt></font> =
<br><font size=3D"2"><tt>JP> Please remove "forwarding"</tt></font> =
<br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Done.</i></b></font> <br> =
<br></p></blockquote>OK<br><blockquote type=3D"cite"><p> <br><font =
size=3D"2"><tt>10) "Communication to these mostly sleeping devices MUST =
be bidirectional."</tt></font> <br><font size=3D"2"><tt>JP> Please be =
more specific. Do you mean by the routing protocol MUST be able to =
compute bi-directional route to sleeping devices ? Why ?</tt></font> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>Yes and =
No. &nbsp;You're actually asking two questions in your question... =
&nbsp;</i></b></font> <br> <br></p></blockquote><div>Yes we leave in a =
constrained environment ;-))</div><blockquote type=3D"cite"><p><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>With regard to =
sleeping devices, the routing protocol must allow for delivering =
messages to an assigned (awake) proxy device who will later transmit the =
information to the sleeping device upon its awaking. &nbsp;I've actually =
addressed this as a separate requirement.</i></b></font> <br> =
<br></p></blockquote><div>Indeed.</div><blockquote type=3D"cite"><p><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>With regard to =
bidirectionality, I am simply saying that sensors must be able to =
receive application ACKs and other configuration data from its =
controller. &nbsp;Some protocols (such as EnOcean) support only =
unidirectional messaging from the sensor to the controller. &nbsp;This =
might work for a lightweight application such as a wireless light switch =
turning on a light, but will not work for most of the commercial =
applications where the sensor must know that the packet has been =
successfully transmitted to the controller (say in a Fire =
application).</i></b></font> <br> <br></p></blockquote><div>Which does =
not necessarily mean a bi-directional route though. As you know most of =
routing protocols are computing&nbsp;unidirectional&nbsp;routes =
(fortunately!)</div><br><blockquote type=3D"cite"><p><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>I've changed the text to read =
...</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Communication to &nbsp;sleeping devices MUST =
be bidirectional to allow for guaranteed packet delivery from the sensor =
to the controller. </i></b></font><font size=3D"3" face=3D"Courier =
New">&nbsp;</font><font size=3D"2"><tt> =
&nbsp;</tt></font></p></blockquote><div>Which is clearer but I still =
have an issue since this is a routing requirement. I do not think that =
you require the routing protocol to compute bi-directional routes. I =
understand that the communication must be bi-directional thus this does =
not add any routing requirements in addition to being able to compute =
routes from a node A to a node B (and vice versa of course). Thus this =
sentence can be deleted, it is already covered.</div><blockquote =
type=3D"cite"><p> <br> <br><font size=3D"2"><tt>11) "In such cases, =
routing MUST recognize the selected proxy </tt></font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;for the sleeping device. "</tt></font> =
<br><font size=3D"2"><tt>JP> "recognize" in which way ? Can you be more =
specific ?</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>This is actually an implementation issue which =
arguably may not be the province of the routing protocol. =
&nbsp;</i></b></font></p></blockquote>This is where I was going =
...<br><blockquote type=3D"cite"><p><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>As I just mentioned above, sleeping devices =
must have a mechanism to receive packets. &nbsp;However since they sleep =
the vast majority of the time, they will need a proxy device to hold the =
packet until the next awake cycle. &nbsp;The question is which layer =
must be cognizant of the proxy device. &nbsp;The APP layer could do it, =
but it would need to constantly be checking to see if the proxy device =
has changed. &nbsp;I would prefer that the routing layer recognize that =
the destination address is for a sleeping device and reroute the packet =
to its assigned proxy with forwarding information added to its sleeping =
device.</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>The text now reads ...</i></b></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>In such =
cases, the routing protocol MUST recognize the assigned proxy for the =
sleeping device; deliver the packet to the assigned proxy for later =
delivery to the sleeping device upon its next awake =
cycle.</i></b></font></p></blockquote><div>Slight disagreement here =
...&nbsp;</div><div><br></div><div>Several cases:&nbsp;</div><div>1) You =
consider this an an application issue: then&nbsp;reword the text by =
mentioning the functionality as an application issue and remove the =
"MUST" or simply remove the sentence.</div><div>2) You want to influence =
the routing decision to traverse the proxy. This is fine and you should =
reword the text this way: "The routing protocol MUST discover the =
capability of a node to act as a proxy during path =
calculation".</div><div>3) You want to&nbsp;change IP routing (which is =
based on the destination and other criteria) and swap destination =
address ... I guess this is not what you propose.</div><blockquote =
type=3D"cite"><p> </p><p> <br><font size=3D"2"><tt>12) "Routing must =
allow for temporary ad hoc paths to be </tt></font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;established that are updated as the network =
physically and <br> &nbsp; functionally expands. "</tt></font> <br><font =
size=3D"2"><tt>JP> This can be a very stringent requirements (although =
there is no normative language). </tt></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>This is more an implementation =
item. &nbsp;Here the idea is that when performing initial room level =
testing, there needs to be some simple network that can be formed to =
verify local operation (not unlike 802.11 Ad Hoc mode or 802.3 crossover =
cable). &nbsp;I actually don't want to foist normative language onto the =
implementers. &nbsp;I changed the 'must' to 'should' in the =
text.</i></b></font> <br> <br></p></blockquote><div>OK</div><blockquote =
type=3D"cite"><p><font size=3D"2"><tt>13) Section 4.1.4: not a routing =
requirements</tt></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>I disagree. &nbsp;Device replacement must have =
zero configuration and immediately join the network as does a new =
device. &nbsp;The installer can't wait around for a 1/2 hour until the =
ARP tables flush and the new MAC address be recognized. &nbsp;Because =
the new device will necessarily have a new MAC, the routing protocol =
will somehow have to deal with routing without using MAC addressing. =
&nbsp;To me, the text as drafted is clear in this regard. &nbsp;Let me =
know if I need more clarity to better express my point.</i></b></font> =
<br> <br></p></blockquote><div>In the text you are referring to IP =
address assignment, use of MAC address, ... these are all IP-related =
issues (not routing !). The routing relates issue is covered in =
4.1.1</div><blockquote type=3D"cite"><p> <br><font size=3D"2"><tt>14) =
Section 4.2</tt></font> <br><font size=3D"2"><tt>"The routing protocol =
MUST be able to support networks with at least </tt></font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;1000 routers and 1000 hosts. "</tt></font> =
<br><font size=3D"2"><tt>If a host is not "routing" no need to mention =
the number of hosts. What matters in this section is the number of =
routers in the LLN. Same comments for the number of sensors.</tt></font> =
<br> <br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>I =
think we have a nomenclature issue here. &nbsp;What I am trying to say =
is that a network (PAN) needs to support at least 1000 powered =
application devices that can also act as routers. &nbsp;The PAN must =
additionally support 1000 sleeping devices which typically have no =
routing capability. &nbsp;I would think all 2000 of these devices would =
be termed 'hosts' in the IT parlance. &nbsp;I am in no way thinking that =
there are application hosts that don't route and then traditional =
standalone routers in the WPAN. &nbsp;The routing protocol needs to be =
software that resides within the application device.</i></b></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>I changed =
the nomenclature to reference 'hosts' and 'routers' at David's request =
on the last version. &nbsp;I probably bolixed it up!!! &nbsp;Please help =
me draft this requirement so it's clear for the IETF =
reader.</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>I changed the text to read ...</i></b></font> =
<br> <br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>The =
routing protocol MUST be able to support networks with at least 2000 =
nodes supporting at least 1000 routing devices and 1000 nonrouting =
device. &nbsp;</i></b></font> </p></blockquote><div>Good, =
thanks.</div><blockquote type=3D"cite"><p><br> <br><font =
size=3D"2"><tt>15) Section 4.3</tt></font> <br><font =
size=3D"2"><tt>"Mobile devices SHOULD be capable of unjoining =
(handing-off) from an </tt></font> <br><font size=3D"2"><tt>&nbsp; =
&nbsp;old network joining onto a new network within 15 seconds. <br> =
</tt></font> <br><font size=3D"3">"</font> <br><font size=3D"3">JP> You =
may want to elaborate a little bit on hat you mean by "unjoining". Does =
that mean that the routing protocol must converge within 15s after the =
removal of the device ?</font> <br> <br> =
<br></p></blockquote><div><br></div>?<br><blockquote type=3D"cite"><p> =
<br><font size=3D"3">16) "The routing mechanisms MUST </font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;therefore be tailored to fit these resource =
constrained devices. &nbsp;"</tt></font> <br><font size=3D"2"><tt>JP> =
This is certainly true but how does this translate to a routing =
requirement ? 10000 times less memory than a several GBytes routers ? =
Since you provide number hereafter, please delete this =
sentence.</tt></font> <br> <br><font size=3D"2" =
color=3D"blue"><b><i>Section 5.4 is a brief introduction of the section =
upon which the requirements are then stated in Sections 5.4.1 and 5.4.2. =
&nbsp;I agree that I should not therefore be putting normative =
requirements in the introductory section. &nbsp;What I did is change the =
'MUST' to a 'must' thereby making the intro only =
informative.</i></b></font> <br> =
<br></p></blockquote>Good.<br><blockquote type=3D"cite"><p> <br><font =
size=3D"2"><tt>17) In Sections 4.4.1 and 4.4.2, what do you mean by =
"software stack": OS+entire protocol stack ?</tt></font> <br><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>Yes, the entire =
operating environment other than the end-application. &nbsp; I changed =
these paragraphs to read ...</i></b></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>5.4.1. &nbsp; &nbsp; &nbsp; =
&nbsp; Limited Processing Power for Non-routing Devices.</i></b></font> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>The =
software size requirement for non-routing devices (e.g. sensors and =
actuators) MUST be implementable in 8-bit devices with no more than =
128KB of flash memory (including at least 32KB for the application code) =
and no more than 8KB of RAM (including at least 1KB RAM available for =
the application). &nbsp;</i></b></font> </p><p><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>5.4.2. &nbsp; &nbsp; &nbsp; =
&nbsp; Limited Processing Power for Routing Devices</i></b></font> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>The =
software size requirements for routing devices (e.g. room controllers) =
SHOULD be implementable in 8-bit devices with no more than 256KB of =
flash memory (including at least 32KB for the application code) and no =
more than 8KB of RAM (including at least 1KB RAM available for the =
application).</i></b></font></p></blockquote><div>But you see the issue =
... since you enter in some implementation issue, what if the =
OS+infra+... code takes 99% of the RAM/Flash. What do I have left for =
the routing component. My strong suggestion here would be to use non =
normative language, usually not a good idea to indicate numbers with =
normative language in IETF I-D (think if the authors of RFC791 had done =
this !).</div><blockquote type=3D"cite"><p> </p><p> <br><font =
size=3D"2"><tt>18) "Routing MUST support anycast, unicast, multicast and =
broadcast </tt></font> <br><font size=3D"2"><tt>&nbsp; &nbsp;services =
(or IPv6 equivalent). "</tt></font> <br><font size=3D"2"><tt>JP> This =
must be changed ... there is no broadcast in IPv6 (and we are =
exclusively working on IPv6) but IPv6 is using multicast (RFC2373). Just =
remove "broadcast".</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>done. &nbsp; I presume that there is a form of =
multicast that will deliver a discovery packet to every node on the =
subnetwork.</i></b></font></p></blockquote>Yes:-) Thanks.<br><blockquote =
type=3D"cite"><p><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>&nbsp;BACnet requires a network wide broadcast =
to discover nodes and objects anywhere on the internetwork. &nbsp;It has =
intrinsic support for unicasting across subnetworks.</i></b></font> <br> =
<br><font size=3D"2"><tt>19) "4.6.1. Firmware Upgrades </tt></font> =
<br><font size=3D"2"><tt><br> &nbsp; To support high speed code =
downloads, routing MUST support transports <br> &nbsp; that provide =
parallel downloads to targeted devices yet guarantee <br> &nbsp; packet =
delivery. "</tt></font> <br><font size=3D"2"><tt>JP> This is clearly a =
device requirement not a routing requirements. I would suggest to =
delete.</tt></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>I'm not willing to give in on this one. =
&nbsp;I agree that as stated this is more of an implementation approach =
(i.e. how to do it) rather than a requirement (i.e. what needs to be =
done). &nbsp;The point I am trying to make is that firmware upgrades =
must be very fast to not lose building control. &nbsp; This has been =
implemented by supporting QoS and a special version of multicast (end of =
transmission ACKs) that allows all devices to be downloaded in parallel =
yet guarantee delivery.</i></b></font> <br> <br></p></blockquote><div>It =
depends of what you mean by "parallel" downloads. If you refer to the =
ability of the application to handle two&nbsp;parallel&nbsp;streams =
please delete. If you want to routing protocol to provide =
two&nbsp;parallel&nbsp;potential disjoint paths then clarify and =
keep.</div><br><blockquote type=3D"cite"><p> <br><font size=3D"2"><tt>20) =
"4.6.2. Diagnostics </tt></font> <br><font size=3D"2"><tt><br> &nbsp; To =
improve diagnostics, the network layer SHOULD be able to be placed <br> =
&nbsp; in and out of 'verbose' mode. &nbsp;Verbose mode is a temporary =
debugging <br> &nbsp; mode that provides additional communication =
information including at <br> &nbsp; least total number of packets sent, =
packets received, number of <br> &nbsp; failed communication attempts, =
neighbor table and routing table <br> &nbsp; entries. "</tt></font> =
<br><font size=3D"2"><tt>JP> This is an important requirement. Please =
just keep the routing aspects.</tt></font> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>Not sure if you're asking for =
some deletion. no change to text.</i></b></font> <br> =
<br></p></blockquote><div>I am proposing to keep the text related to =
routing (and remove the non routing piece): the text should =
read:</div><div><br></div><div><blockquote type=3D"cite"><span =
class=3D"Apple-style-span" style=3D"font-family: -webkit-monospace; =
font-size: 9px; ">To improve diagnostics, the network layer SHOULD be =
able to be placed&nbsp;<br>&nbsp; in and out of 'verbose' mode. =
&nbsp;Verbose mode is a temporary debugging&nbsp;<br>&nbsp; mode that =
provides additional communication information including =
at&nbsp;<br>&nbsp; least total number of routing packets sent and =
received, number of&nbsp;<br>&nbsp;&nbsp;routing failure (no route =
available), neighbor table and routing table&nbsp;<br>&nbsp; =
entries.</span></blockquote><br></div><div>But the total number of =
packet sent out of an interface is not a routing =
requirements.</div><blockquote type=3D"cite"><p> <br> <br><font =
size=3D"2"><tt>21) "4.6.3. Route Tracking </tt></font> <br><font =
size=3D"2"><tt><br> &nbsp; Route diagnostics SHOULD be supported =
providing information such as <br> &nbsp; path quality; number of hops; =
available alternate active paths with <br> &nbsp; associated costs. =
"</tt></font> <br><font size=3D"2"><tt>JP> Please define "path =
quality".</tt></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Whatever means we employ to select one path =
over other paths. &nbsp;In debugging, it's sometime unclear why one path =
is selected in lieu of other paths. &nbsp;This info should be =
available.</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>I added the sentence...</i></b></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>Path =
quality is the relative measure of =91goodness=92 of the selected source =
to destination path as compared to alternate paths. &nbsp;This =
&nbsp;composite value may be measured as a function of hop count, signal =
strength, available power, existing active paths or any other criteria =
deemed by ROLL as the path cost differentiator.</i></b></font> </p><p> =
<br></p></blockquote><div>Good.</div><blockquote type=3D"cite"><p><font =
size=3D"2"><tt>22) Section 4.7</tt></font> <br><font size=3D"2"><tt>JP> =
I understand your concern but this is not a routing requirement either. =
The IETF specifies IP-based protocol and cannot depend on non-IP =
protocols. I would suggest to remove that section.</tt></font> <br><font =
size=3D"2" color=3D"blue"><b><i>BACnet is an application protocol that =
sits atop of UDP. &nbsp;Hence it is an IP protocol!!!. &nbsp; =
</i></b></font></p></blockquote><div><br></div>Although they are routing =
on top of IP using IP as layer 2 (but this is another =
discussion).<br><blockquote type=3D"cite"><p><font size=3D"2" =
color=3D"blue"><b><i>To me, this is no different than assuring that =
ROLL/6LoWPAN supports FTP. &nbsp;</i></b></font> <br><font size=3D"2" =
color=3D"blue"><b><i>I don't know if LON has intrinsic IP support. =
&nbsp;I will drop the LON requirement. &nbsp;The text now reads =
...</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>The building automation industry adheres to =
BACnet, a UDP/IP application layer protocol, to achieve vendor =
interoperability. &nbsp;It is estimated that fully 80% of customer bid =
requests received world-wide will require compliance to this ISO =
standard within five years. &nbsp;ROLL routing SHOULD support this =
application protocol to assure acceptance in the building automation =
industry. </i></b></font><font size=3D"3" =
face=3D"sans-serif">&nbsp;</font> </p></blockquote><div>We cannot keep =
that text. What does it mean "ROLL SHOULD support this application ?". =
ROLL will specific a routing protocol in LLN. Any IP-based application =
will be supported if it relies on IP. This is the beauty of =
layering.</div><blockquote type=3D"cite"><p><br> <br> <br><font =
size=3D"2"><tt>23) Section 4.7.1</tt></font> <br><font size=3D"2"><tt>Per =
our charter, we exclusively focus on IPv6. Furthermore, the term =
intercommunication is ambiguous. I would suggest to delete =
4.7.1</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>I &nbsp;moved this requirement to Appendix A =
as being out of scope for ROLL. &nbsp;However, the FMS industry has been =
installing IPv4 devices into buildings for at least 10 years. =
&nbsp;These devices have a lifetime of at least 25 years and will need =
to communicate to newer devices. &nbsp;If we (the IETF) don't provide a =
seamless interface across IPv4 and IPv6 we can expect little interest in =
this market.</i></b></font> </p></blockquote><div>Good that you moved to =
the appendix. yes there are already defined mechanism between v4 and =
v6.</div><blockquote type=3D"cite"><p><br> <br><font size=3D"2"><tt>24) =
Section 4.7.2</tt></font> <br><font size=3D"2"><tt>"Routing MUST support =
packet sizes to 1526 octets (to be backwards </tt></font> <br><font =
size=3D"2"><tt>&nbsp; &nbsp;compatible with 802.3 subnetworks) =
"</tt></font> <br><font size=3D"2"><tt>JP> Please remove the text in =
parenthesis. Strictly speaking the ROLL protocol(s) will not be backward =
compatible with 802.3.</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Done.</i></b></font> =
</p></blockquote><div><br></div>OK<br><blockquote type=3D"cite"><p><br> =
<br><font size=3D"2"><tt>25) "Route discovery occurring during packet =
</tt></font> <br><font size=3D"2"><tt>&nbsp; &nbsp;transmission MUST not =
exceed 120 msecs."</tt></font> <br><font size=3D"2"><tt>JP> I would =
suggest to slightly reword since it gives the impression that you =
mandate a reactive routing mechanism.</tt></font> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>I tried to clarify the need and =
changed the MUST to SHOULD. &nbsp;It now reads ...</i></b></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>Route =
discovery occurring during packet transmission SHOULD not add more than =
120 msecs latency to the packet mean delivery time.</i></b></font> =
</p><p> <br></p></blockquote>Still implicitly implying reactive routing. =
I would suggest "If route discovery occurs during packet transmission =
time, it SHOULD NOT add more than 120ms of latency to the packet =
delivery time".<br><blockquote type=3D"cite"><p> <br><font =
size=3D"2"><tt>26) "4.8.5. Route Preference </tt></font> <br><font =
size=3D"2"><tt><br> &nbsp; The route discovery mechanism SHOULD allow a =
source node (sensor) to <br> &nbsp; dictate a configured destination =
node (controller) as a preferred <br> &nbsp; routing path. "</tt></font> =
<br><font size=3D"2"><tt>JP> mmm ... what do you mean by "dictate a =
configured destination node as a preferred path ?". Do you mean that the =
routing protocol SHOULD allow for routing along a configured path on the =
source ?</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>The word 'dictate' is probably too strong. =
&nbsp;Maybe 'suggest' would be better. &nbsp;What I'm trying to note is =
that many FMS applications have apriori knowledge of the spatial =
placement of the client and server devices. &nbsp;Yet the 'route cost' =
algorithms don't &nbsp;account for this knowledge in the costing =
algorithm calculations. &nbsp;As an example, a room temperature sensor =
and its associated room controller are always within point-to-point =
distance. &nbsp;Yet empirical data shows that many times the path will =
have additional hops. &nbsp;The added latency of a couple additional =
hops isn't at issue. &nbsp;It's just the extra load on the network to =
hop across extraneous devices.</i></b></font> <br> <br><font size=3D"2" =
color=3D"blue" face=3D"sans-serif"><b><i>I changed the text to read =
...</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Route cost algorithms SHOULD allow the =
installer to optionally select 'preferred' paths based on the known =
spatial layout of the communicating devices.</i></b></font> </p><p> =
<br></p></blockquote><div>OK</div><blockquote type=3D"cite"><p><font =
size=3D"2"><tt>27) "4.8.6. Path Persistence </tt></font> <br><font =
size=3D"2"><tt><br> &nbsp; To eliminate high network traffic in =
power-fail or brown-out <br> &nbsp; conditions previously established =
routes SHOULD be remembered and <br> &nbsp; invoked prior to =
establishing new routes for those devices reentering <br> &nbsp; the =
network. "</tt></font> <br><font size=3D"2"><tt>JP> This is a device / =
implementation-specific choice. Should be removed.</tt></font> <br><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>I disagree. =
&nbsp;We're dealing with a LLNs that can ill-afford to have hundreds of =
nodes simultaneously purge their neighbor lists and routing tables just =
because of a 1 second brownout! &nbsp;I think at some point the IETF has =
to take into account that LLNs are very limited data highways and =
mandate certain operational modes.</i></b></font> <br> =
<br></p></blockquote><div>I do not disagree with the importance of the =
requirements and we cannot prevent people from wrong =
implementation.</div><div>Clearly we cannot keep that MUST here, this is =
pure implementation issue and cannot stay in the =
document.</div><blockquote type=3D"cite"><p> <br><font size=3D"2"><tt>28) =
Please remove Section 6</tt></font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Hmmm, &nbsp;little confused here since prior =
comments changed the section numbers. &nbsp;I am assuming this comment =
references the 'Open Issues' section. &nbsp;I've deleted that section. =
&nbsp;</i></b></font> <br> <br></p></blockquote><div>Yes indeed. =
Thanks.</div><blockquote type=3D"cite"><p> <br><font size=3D"2"><tt>29) =
Security.</tt></font> <br><font size=3D"2"><tt>JP> Don't you have any =
security requirements ? Could you please look at:</tt></font> <br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-urban-routing-=
reqs-03.txt"><font size=3D"2" =
color=3D"blue"><tt><u>http://www.ietf.org/internet-drafts/draft-ietf-roll-=
urban-routing-reqs-03.txt</u></tt></font></a> <br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-indus-routing-=
reqs-03.txt"><font size=3D"2" =
color=3D"blue"><tt><u>http://www.ietf.org/internet-drafts/draft-ietf-roll-=
indus-routing-reqs-03.txt</u></tt></font></a> <br><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-home-routing-r=
eqs-06.txt"><font size=3D"2" =
color=3D"blue"><tt><u>http://www.ietf.org/internet-drafts/draft-ietf-roll-=
home-routing-reqs-06.txt</u></tt></font></a> <br><font size=3D"2"><tt>to =
see if you do not have security requirements along those lines =
?</tt></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Yes. &nbsp;My first draft had 10 pages of =
security requirements! &nbsp;However, we deemed them out of scope since =
these requirements do not affect routing. &nbsp;What we seemed to agree =
to in the email exchanges is that a node must be trusted (and possibly =
authenticated) upon joining the network, but once a trusted node joins =
the network, it can move packets across the network unimpeded by =
security concerns.</i></b></font> <br> <br><font size=3D"2" color=3D"blue"=
 face=3D"sans-serif"><b><i>The text now reads ...</i></b></font> <br> =
<br><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>7. &nbsp; =
&nbsp; &nbsp; &nbsp; Security Considerations</i></b></font> </p><p><font =
size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>Security policies, =
especially wireless encryption and device authentication needs to be =
considered, especially with concern to the impact on the processing =
capabilities and additional latency incurred on the sensors, actuators =
and controllers.</i></b></font> </p><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>FMS systems are typically highly configurable =
in the field and hence the security policy is most often dictated by the =
type of building to which the FMS is being installed. &nbsp; Single =
tenant owner occupied office buildings installing lighting or HVAC =
control are candidates for implementing low or even no security on the =
LLN. &nbsp;Antithetically, military or pharmaceutical facilities require =
strong security policies. &nbsp;As noted in the installation procedures =
above, security policies must be facile to allow no security during the =
installation phase (prior to building occupancy), yet easily raise the =
security level network wide during the commissioning phase of the =
system.</i></b></font> </p><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>7.1. &nbsp; &nbsp; &nbsp; &nbsp; Security =
Requirements</i></b></font> <br><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>7.1.1. &nbsp; &nbsp; &nbsp; &nbsp; =
Authentication</i></b></font> <br><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>Authentication MUST be optional on the LLN. =
&nbsp;Authentication MUST be fully configurable on-site. Authentication =
policy and updates MUST be transmittable over-the-air. =
&nbsp;Authentication MUST occur upon joining or rejoining a network. =
&nbsp;However, once authenticated devices SHOULD not need to =
reauthenticate themselves with any other devices in the =
LLN.</i></b></font> </p><p><font size=3D"2" color=3D"blue" face=3D"Courier=
 New"><b><i>7.1.2. &nbsp; &nbsp; &nbsp; &nbsp; Encryption</i></b></font> =
<br><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>7.1.2.1. =
&nbsp; &nbsp; &nbsp; &nbsp; Encryption Levels</i></b></font> <br><font =
size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>Encryption MUST be =
optional on the LLN. &nbsp;Encryption MUST be fully configurable =
on-site. &nbsp;</i></b></font></p></blockquote><div>=3D> See this is =
another implementation issue.</div><br><blockquote type=3D"cite"><p><font =
size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>Encryption policy =
and updates MUST be transmittable over-the-air and in-the-clear. =
&nbsp;</i></b></font> </p><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>7.1.2.2. &nbsp; &nbsp; &nbsp; &nbsp; Security =
Policy Flexibility</i></b></font> <br><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>In most facilities authentication and =
encryption will be turned off during installation. &nbsp;</i></b></font> =
</p><p><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>More =
complex encryption policies might be put in force at commissioning time. =
&nbsp;New encryption policies MUST be allowed to be presented to all =
devices in the LLN over the network without needing to visit each =
device.</i></b></font> </p><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>7.1.2.3. &nbsp; &nbsp; &nbsp; &nbsp; =
Encryption Types</i></b></font> <br><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>Data encryption of packets MUST optionally be =
supported by use of either a network wide key and/or application key. =
&nbsp; &nbsp;The network key would apply to all devices in the LLN. =
&nbsp;The application key would apply to a subset of devices on the LLN. =
&nbsp;</i></b></font> </p><p><font size=3D"2" color=3D"blue" =
face=3D"Courier New"><b><i>The network key and application keys would be =
mutually exclusive. &nbsp;Forwarding devices in the mesh MUST be able to =
forward a packet encrypted with an application key without needing to =
have the application key.</i></b></font> </p><p><font size=3D"2" =
color=3D"blue" face=3D"Courier New"><b><i>7.1.2.4. &nbsp; &nbsp; &nbsp; =
&nbsp; Packet Encryption </i></b></font> <br><font size=3D"2" =
color=3D"blue" face=3D"Courier New"><b><i>The encryption policy MUST =
support encryption of the payload only or the entire packet. =
&nbsp;Payload only encryption would eliminate the =
decryption/re-encryption overhead at every hop.</i></b></font> =
</p><p><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>7.1.3. =
&nbsp; &nbsp; &nbsp; &nbsp; Disparate Security Policies</i></b></font> =
<br><font size=3D"2" color=3D"blue" face=3D"Courier New"><b><i>Due to =
the limited resources of an LLN, the security policy defined within the =
LLN MUST be able to differ from that of the rest of the IP network =
within the facility yet packets MUST still be able to route to or =
through the LLN from/to these networks.</i></b></font> </p><div> <br =
class=3D"webkit-block-placeholder"></div></blockquote><div><br></div><div>=
Please just add "Routing" whenever appropriate to show that this is not =
applicable to all traffic in this particular =
document.</div><br><blockquote type=3D"cite"><p> <br> <br><font =
size=3D"2"><tt>30) Please remove (see comments number 32 =
below)</tt></font> <br><font size=3D"2"><tt>&nbsp; &nbsp; See Appendix A =
for additional requirements <br> &nbsp; that have been deemed outside =
the scope of this document yet will <br> &nbsp; pertain to the =
successful deployment of building automation systems. </tt></font> =
<br><font size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>See =
below</i></b></font> <br> <br><font size=3D"3">31) References</font> =
<br> <br><font size=3D"3">Please reformat the references section to list =
the relevant details of each document + add a normative reference to RFC =
2119.</font> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>Done.</i></b></font> <br> <br><font =
size=3D"3">For example:</font> <br> <br><font size=3D"2"><tt>10. =
&nbsp;References<br> <br> 10.1. &nbsp;Normative References<br> <br> =
&nbsp; [RFC2119] &nbsp;Bradner, S., "Key words for use in RFCs to =
Indicate<br> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Requirement =
Levels", BCP 14, RFC 2119, March 1997.<br> <br> 10.2. &nbsp;Informative =
References<br> <br> &nbsp; [I-D.ietf-roll-home-routing-reqs]<br> &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Brandt, A., Buron, J., and G. =
Porcu, "Home Automation<br> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;Routing Requirements in Low Power and Lossy Networks",<br> &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;draft-ietf-roll-home-routing-reqs-06 (work in progress),<br> =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;November =
2008.</tt></font> <br> =
<br></p></blockquote><div><br></div><div>Thanks.</div><br><blockquote =
type=3D"cite"><p><font size=3D"3">32) Appendix A</font> <br><font =
size=3D"2"><tt>The requirements will need to <br> &nbsp; be addressed by =
ROLL or other WGs before adoption by the building <br> &nbsp; automation =
industry will be considered. </tt></font> <br><font size=3D"2"><tt>JP> =
Please remove, since ROLL is about routing, thus we will not be =
chartered to address non routing requirements.</tt></font> <br><font =
size=3D"2"><tt>Giving more thoughts, this appendix does provide very =
useful and well documented data. That being said, they do not really =
belong to this document and may introduce confusion. I would suggest to =
remove this appendix from the document.</tt></font> <br> <br><font =
size=3D"2" color=3D"blue" face=3D"sans-serif"><b><i>In my mind the =
requirements noted in &nbsp;Appendix A are as important to the =
successful deployment of IP wireless sensor networks than most of those =
still in the body of the document. &nbsp;It's only because of the =
compartmentalized nature of the IETF that you feel they are out of =
scope. &nbsp;I think it's very important that we continue to look at the =
requirement set holistically even if our current mission is more tightly =
focused. &nbsp;I would like to leave Appendix A included in this =
document.</i></b></font> <br> <br><font size=3D"2" color=3D"blue" =
face=3D"sans-serif"><b><i>&nbsp;</i></b></font> </p></blockquote><div>OK =
let's keep it there and we will see during IESG review whether we need =
to remove it.</div><div><br></div><div>Thanks to incorporate in rev03 =
and wait before posting until end of LC&nbsp;on January 30 at 9:00am to =
address potentially other =
comments.</div><div><br></div><div>Thanks.</div><div><br></div><div>JP.</d=
iv><br><blockquote type=3D"cite"><p><br> <br> <br><font =
size=3D"3">Thanks.</font> <br> <br><font size=3D"3">JP.</font> <br> <br> =
<br><font size=3D"3">Begin forwarded message:</font> <br> <br><font =
size=3D"4"><b>From: </b></font><a =
href=3D"mailto:Internet-Drafts@ietf.org"><font size=3D"4" =
color=3D"blue"><u>Internet-Drafts@ietf.org</u></font></a> <br><font =
size=3D"4"><b>Date: </b>January 15, 2009 12:00:02 AM CEST</font> =
<br><font size=3D"4"><b>To: </b></font><a =
href=3D"mailto:i-d-announce@ietf.org"><font size=3D"4" =
color=3D"blue"><u>i-d-announce@ietf.org</u></font></a> <br><font =
size=3D"4"><b>Cc: </b></font><a href=3D"mailto:roll@ietf.org"><font =
size=3D"4" color=3D"blue"><u>roll@ietf.org</u></font></a> <br><font =
size=3D"4"><b>Subject: [Roll] I-D =
Action:draft-ietf-roll-building-routing-reqs-02.txt</b></font> <br> =
<br><font size=3D"3">A New Internet-Draft is available from the on-line =
Internet-Drafts directories.<br> This draft is a work item of the =
Routing Over Low power and Lossy networks Working Group of the IETF.<br> =
<br> <br> Title &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; : Building Automation =
Routing Requirements in Low Power and Lossy Networks<br> Author(s) =
&nbsp; &nbsp; &nbsp; : J. Martocci, et al.<br> Filename &nbsp; &nbsp; =
&nbsp; &nbsp;: draft-ietf-roll-building-routing-reqs-02.txt<br> Pages =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; : 27<br> Date &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp;: 2009-01-14<br> <br> The Routing Over Low power and =
Lossy network (ROLL) Working Group has <br> been chartered to work on =
routing solutions for Low Power and Lossy <br> networks (LLN) in various =
markets: Industrial, Commercial (Building), <br> Home and Urban. =
Pursuant to this effort, this document defines the <br> routing =
requirements for building automation. <br> <br> Requirements Language =
<br> <br> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL =
NOT", <br> "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" =
in this <br> document are to be interpreted as described in =
RFC-2119.<br> <br> A URL for this Internet-Draft is:</font><font =
size=3D"3" color=3D"blue"><u><br> </u></font><a =
href=3D"http://www.ietf.org/internet-drafts/draft-ietf-roll-building-routi=
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A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the Routing Over Low power and Lossy networks Working Group of the IETF.

	Title		: Overview of Existing Routing Protocols for Low Power and Lossy Networks
	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
	Filename	: draft-ietf-roll-protocols-survey-05.txt
	Pages		: 26
	Date		: 2009-1-26
	
Networks of low power wireless devices introduce novel IP routing
   issues.  Low-power wireless devices, such as sensors, actuators and
   smart objects, have difficult constraints: very limited memory,
   little processing power, and long sleep periods.  As most of these
   devices are battery-powered, energy efficiency is critically
   important.  Wireless link qualities can vary significantly over time,
   requiring protocols to make agile decisions yet minimize topology
   change energy costs.  Routing over such low power and lossy networks
   has novel requirements that existing protocols may not address.  This
   document provides a brief survey of the strengths and weaknesses of
   existing protocols with respect to this class of networks.  From this
   survey it examines whether existing and mature IETF protocols can be
   used without modification in these networks, or whether further work
   is necessary.
   is necessary.

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From roll-bounces@ietf.org  Mon Jan 26 16:16:57 2009
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On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:

> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Routing Over Low power and Lossy  
> networks Working Group of the IETF.
>
> 	Title		: Overview of Existing Routing Protocols for Low Power and  
> Lossy Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-05.txt
> 	Pages		: 26
> 	Date		: 2009-1-26

Edits:

Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.

Fixed incorrect table values for OLSRv2. Triggered updates are  
optional, so loss is a ?.

Changed "Suitability Summary" to "Criteria"

Fixed O(R + e) to O(R) + e.

Removed redundant paragraph in 4.4 "The control cost criterion is a  
necessary but not..."

Made IETF scope more specific ("any protocol" -> "any protocol outside  
the IETF").

Added errata to terminology section ("NOT RECOMMENDED").

Cleaned up RFC/draft terminology in Section 4.

Clarified "unbounded" control overhead.

Explained 4kB of RAM.

Phil





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> Added errata to terminology section ("NOT RECOMMENDED").

That doesn't seem to have actually been done.

I have two nits, one new, one I've only just spotted.

In 3.1 there's a "Thhere".

At the end of the first paragraph in 4 before 4.1, last
line, criterion ought to be criteria.

These, to me, come under the heading of mark for the
future, rather than reason on their own to re-issue.

Personally I still would take "novel" out of the
abstract, and I still think "extenuating" in the
introduction is not the right word. Same heading.

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Internet-Drafts@ietf.org a =E9crit :
> 	Title		: Overview of Existing Routing Protocols for Low Power and Lossy =
Networks
> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
> 	Filename	: draft-ietf-roll-protocols-survey-05.txt
> 	Pages		: 26
> 	Date		: 2009-1-26

Thanks for this new version of the draft!

First: I'm not politicking.
Second: there's apparently a deadline, please respect it.
Third: here are my comments:

I'm not convinced by the NEMO exclusion paragraph:

> This document does not examine the Network Mobility Basic Support =

> Protocol (NEMO RFC 3963 [RFC3963]) because it is not a routing =

> protocol.  It does not examine hierarchical NEMO =

> [I-D.thubert-tree-discovery] as a candidate because it only maintains
>  a default route and so is insufficient for general routing.
> Although NEMO itself is not a suitable routing solution to LLNs, some
> of its mechanisms, such as loop-free tree formation, might be useful
> in an LLN routing protocol.

NEMO could qualify certain characteristics of routing protocols.  I've =

said that already.  Thomas seemed to agree on the general question of =

defining what a routing protocol is, but in another mail JP seemed to =

suggest we shouldn't do that here.  If so - then I disagree.  That's why =

I'm silent.

Also, draft-thubert is a personal proposal, since long (could be said =

'mature') yet I don't consider it a IETF protocol.  Thus I don't =

understand why citing it.

Also, if one disqualifies draft-thubert because of the fact it only =

builds default routes - I agree with the disqualification as such, but =

then there exist another personal draft which could be used in =

conjunction which deals with specific routes as well (not only default =

routes) in the context of NEMO moving networks.  I don't name it in =

order to avoid being qualified as politicizing, pushing own ideas, etc.

Also, 'mobility' appears cited three times in the requirements documents =

and NEMO protocol could be a good candidate to treat some types of =

network mobility.

At least for these four reasons I'm not convinced by this =

protocols-survey NEMO paragraph.

Alex

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "Alexandru Petrescu" <alexandru.petrescu@gmail.com>, <Internet-Drafts@ietf.org>
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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Hi Alex:

Ideas derived from the work on routing in nested NEMO and MANEMO might appl=
y to ROLL. The study does not rule them out of the solution space once we r=
echarter. The study just did not include them in its scope because they did=
 not achieve the right status, like draft standard.

Pascal

>-----Original Message-----
>From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On Behalf Of Al=
exandru Petrescu
>Sent: mardi 27 janvier 2009 18:29
>To: Internet-Drafts@ietf.org
>Cc: roll@ietf.org; i-d-announce@ietf.org
>Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
>
>Internet-Drafts@ietf.org a =E9crit :
>> 	Title		: Overview of Existing Routing Protocols for Low Power and Lossy=
 Networks
>> 	Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. Levis
>> 	Filename	: draft-ietf-roll-protocols-survey-05.txt
>> 	Pages		: 26
>> 	Date		: 2009-1-26
>
>Thanks for this new version of the draft!
>
>First: I'm not politicking.
>Second: there's apparently a deadline, please respect it.
>Third: here are my comments:
>
>I'm not convinced by the NEMO exclusion paragraph:
>
>> This document does not examine the Network Mobility Basic Support
>> Protocol (NEMO RFC 3963 [RFC3963]) because it is not a routing
>> protocol.  It does not examine hierarchical NEMO
>> [I-D.thubert-tree-discovery] as a candidate because it only maintains
>>  a default route and so is insufficient for general routing.
>> Although NEMO itself is not a suitable routing solution to LLNs, some
>> of its mechanisms, such as loop-free tree formation, might be useful
>> in an LLN routing protocol.
>
>NEMO could qualify certain characteristics of routing protocols.  I've
>said that already.  Thomas seemed to agree on the general question of
>defining what a routing protocol is, but in another mail JP seemed to
>suggest we shouldn't do that here.  If so - then I disagree.  That's why
>I'm silent.
>
>Also, draft-thubert is a personal proposal, since long (could be said
>'mature') yet I don't consider it a IETF protocol.  Thus I don't
>understand why citing it.
>
>Also, if one disqualifies draft-thubert because of the fact it only
>builds default routes - I agree with the disqualification as such, but
>then there exist another personal draft which could be used in
>conjunction which deals with specific routes as well (not only default
>routes) in the context of NEMO moving networks.  I don't name it in
>order to avoid being qualified as politicizing, pushing own ideas, etc.
>
>Also, 'mobility' appears cited three times in the requirements documents
>and NEMO protocol could be a good candidate to treat some types of
>network mobility.
>
>At least for these four reasons I'm not convinced by this
>protocols-survey NEMO paragraph.
>
>Alex
>
>_______________________________________________
>Roll mailing list
>Roll@ietf.org
>https://www.ietf.org/mailman/listinfo/roll
_______________________________________________
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From roll-bounces@ietf.org  Thu Jan 29 02:59:07 2009
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Date: Thu, 29 Jan 2009 11:58:39 +0100
From: Ulrich Herberg <ulrich.herberg@polytechnique.edu>
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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Hi,

thanks to the authors for this revised version of the ID. It certainly
has improved a lot. All my minor points have been addressed and
included. Some of my general remarks (applicability statement, security
considerations section, split up of criteria and protocol evaluation
into two documents) in my last email have been noted but not included. I
don't have anything new to add.

Best regards,
Ulrich

Philip Levis wrote:
> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy
>> networks Working Group of the IETF.
>>
>> Title : Overview of Existing Routing Protocols for Low Power and
>> Lossy Networks
>> Author(s) : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>> Filename : draft-ietf-roll-protocols-survey-05.txt
>> Pages : 26
>> Date : 2009-1-26
>
> Edits:
>
> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>
> Fixed incorrect table values for OLSRv2. Triggered updates are
> optional, so loss is a ?.
>
> Changed "Suitability Summary" to "Criteria"
>
> Fixed O(R + e) to O(R) + e.
>
> Removed redundant paragraph in 4.4 "The control cost criterion is a
> necessary but not..."
>
> Made IETF scope more specific ("any protocol" -> "any protocol outside
> the IETF").
>
> Added errata to terminology section ("NOT RECOMMENDED").
>
> Cleaned up RFC/draft terminology in Section 4.
>
> Clarified "unbounded" control overhead.
>
> Explained 4kB of RAM.
>
> Phil
>
>
>
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Hi Pascal,

Pascal Thubert (pthubert) a =E9crit :
> Hi Alex:
> =

> Ideas derived from the work on routing in nested NEMO and MANEMO =

> might apply to ROLL. The study does not rule them out of the solution
>  space once we recharter. The study just did not include them in its =

> scope because they did not achieve the right status, like draft =

> standard.

But only OSPF and RIP have Draft Standard status, all the others like
MANET routing protocols don't have Draft Standard status either.  The
status level ('maturity'?) does not even figure as a column in the
Figure 1 table.

The study does not talk recharter at all.

I think I don't understand what you mean.

All I see is this:
> This document does not examine the Network Mobility Basic Support =

> Protocol (NEMO RFC 3963 [RFC3963]) because it is not a routing =

> protocol.

I have very strong doubts about the validity of this statement.

Not only I think NEMO protocol _does_ satisfy some of the typical
qualifications of a typical routing protocol (e.g. it does exchange
prefixes/subnets in messages, it affects the routing table) but also
I think it may satisfy some of the explicitely mobility requirements in
the reqs documents.

If timeline is an issue, I'm not requesting more detailed examination of
the NEMO protocol, but I suggest for another motivation, like for
example "when we have time we'll look at NEMO too".

All the other motivaitons like "not being a routing protocol" or "not
yet Draft Standard status" are not valid to me, sorry to say so.

If needed, I could contribute better formulate a NEMO paragraph in this
document.

Alex




> =

> Pascal
> =

>> -----Original Message----- From: roll-bounces@ietf.org =

>> [mailto:roll-bounces@ietf.org] On Behalf Of Alexandru Petrescu =

>> Sent: mardi 27 janvier 2009 18:29 To: Internet-Drafts@ietf.org Cc: =

>> roll@ietf.org; i-d-announce@ietf.org Subject: Re: [Roll] I-D =

>> ACTION:draft-ietf-roll-protocols-survey-05.txt
>> =

>> Internet-Drafts@ietf.org a =E9crit :
>>> Title		: Overview of Existing Routing Protocols for Low Power and
>>>  Lossy Networks Author(s)	: A. Tavakoli, S. Dawson-Haggerty, P. =

>>> Levis Filename	: draft-ietf-roll-protocols-survey-05.txt Pages		:
>>>  26 Date		: 2009-1-26
>> Thanks for this new version of the draft!
>> =

>> First: I'm not politicking. Second: there's apparently a deadline, =

>> please respect it. Third: here are my comments:
>> =

>> I'm not convinced by the NEMO exclusion paragraph:
>> =

>>> This document does not examine the Network Mobility Basic Support
>>>  Protocol (NEMO RFC 3963 [RFC3963]) because it is not a routing =

>>> protocol.  It does not examine hierarchical NEMO =

>>> [I-D.thubert-tree-discovery] as a candidate because it only =

>>> maintains a default route and so is insufficient for general =

>>> routing. Although NEMO itself is not a suitable routing solution =

>>> to LLNs, some of its mechanisms, such as loop-free tree =

>>> formation, might be useful in an LLN routing protocol.
>> NEMO could qualify certain characteristics of routing protocols. =

>> I've said that already.  Thomas seemed to agree on the general =

>> question of defining what a routing protocol is, but in another =

>> mail JP seemed to suggest we shouldn't do that here.  If so - then =

>> I disagree.  That's why I'm silent.
>> =

>> Also, draft-thubert is a personal proposal, since long (could be =

>> said 'mature') yet I don't consider it a IETF protocol.  Thus I =

>> don't understand why citing it.
>> =

>> Also, if one disqualifies draft-thubert because of the fact it only
>>  builds default routes - I agree with the disqualification as such,
>>  but then there exist another personal draft which could be used in
>>  conjunction which deals with specific routes as well (not only =

>> default routes) in the context of NEMO moving networks.  I don't =

>> name it in order to avoid being qualified as politicizing, pushing =

>> own ideas, etc.
>> =

>> Also, 'mobility' appears cited three times in the requirements =

>> documents and NEMO protocol could be a good candidate to treat some
>>  types of network mobility.
>> =

>> At least for these four reasons I'm not convinced by this =

>> protocols-survey NEMO paragraph.
>> =

>> Alex
>> =

>> _______________________________________________ Roll mailing list =

>> Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
> =



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Rechartering ROLL has been mentioned to me in private several times, and 
now in public, when discussing the protocol-survey draft.

This rechartering is news to me.  Has ROLL rechartering been already 
discussed publicly on the list?  Sorry I may have missed emails.

Alex

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Subject: Re: [Roll] Rechartering discussion?
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Yes, it has been discussed at every IETF meeting and on the mailing 
list.  The original charter was extremely restrictive.  We could not 
begin any protocol design, not even tweaks to existing protocols, until 
we completed the requirements documents and the protocol survey.  The 
rationale was that the outcome of this analysis might arrive at the 
conclusion that no new routing protocol work is needed.  The charter was 
designed to maintain that as an option so that it would not be a 
foregone conclusion that the group would jump whole hog into yet another 
routing protocol.  This has been in the slide materials and minutes over 
every meeting.  It is why it is so important that we complete this phase 
of work.  We cannot even consider changing one line of a protocol draft 
until we recharter.

Alexandru Petrescu wrote:
> Rechartering ROLL has been mentioned to me in private several times, 
> and now in public, when discussing the protocol-survey draft.
>
> This rechartering is news to me.  Has ROLL rechartering been already 
> discussed publicly on the list?  Sorry I may have missed emails.
>
> Alex
>
> _______________________________________________
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Date: Thu, 29 Jan 2009 10:57:57 -0500
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From: Ian Chakeres <ian.chakeres@gmail.com>
To: Philip Levis <pal@cs.stanford.edu>
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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Philip, I am glad to see another revision of the protocol-survey - but
I am disappointed to see that many of my comments were ignored and
several errors remain.

I've included the contents of my earlier email about the errors below.

Sincerely,
Ian Chakeres

===START===
I examined draft-ietf-roll-protocol-survey-03. I found most of my
earlier comments addressed, but I believe there are still a few more
items that need to be changed.

DYMO's distance metric allows representation of link and node cost,
along with other cost factors. Although "node" and "link" cost are not
explicitly called out in the DYMO ID, the distance value associated
with routing information can be modified before consideration for
inclusion in the routing table as well as prior to sending routing
information. The roll-protocol-survey document and summary table
should be updated accordingly.

DYMO-16 does not require, but does by default encourage
sending/forwarding of RERR. Please modify Section 12 accordingly. I
believe this change also effects the loss response rating for DYMO in
the summary table.

I think all '-low' should be removed from the protocol-survey.

Finally, I did not see any change in Section 4.2, which I believe
others also agreed was not clear.

Here was my original comment

"""
In Section 4.2, the motivation provided is the possibly large network
size (250-millions) and deep network (20 hops). Network size and
routing information size do not have a direct connection when
hierarchical addressing is used. Perhaps this motivation could be
removed and simply the last sentence kept. Given this change maybe the
suitability metric should become routing table size, instead of table
scalability.
"""
===END===

On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu> wrote:
> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy networks
>> Working Group of the IETF.
>>
>>        Title           : Overview of Existing Routing Protocols for Low
>> Power and Lossy Networks
>>        Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>>        Filename        : draft-ietf-roll-protocols-survey-05.txt
>>        Pages           : 26
>>        Date            : 2009-1-26
>
> Edits:
>
> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>
> Fixed incorrect table values for OLSRv2. Triggered updates are optional, so
> loss is a ?.
>
> Changed "Suitability Summary" to "Criteria"
>
> Fixed O(R + e) to O(R) + e.
>
> Removed redundant paragraph in 4.4 "The control cost criterion is a
> necessary but not..."
>
> Made IETF scope more specific ("any protocol" -> "any protocol outside the
> IETF").
>
> Added errata to terminology section ("NOT RECOMMENDED").
>
> Cleaned up RFC/draft terminology in Section 4.
>
> Clarified "unbounded" control overhead.
>
> Explained 4kB of RAM.
>
> Phil
>
>
>
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>
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In this mail I argue about:
-Table Scalability can't be a factor to disqualify any protocol (specs
  are eminently silent about how tables are represented and thus
  how they scale).
-Loss Response can't be a factor to discard NEMO (MR only sends to HA,
  not to n destinations upon link up/down events).
-Control Cost tests can very well accept MIP-based NEMO protocol in that
  MIP and ND have rate limitation.

-Asking about Link and Node cost metrics: maybe that's it actually.

-Suggest corrections to the use of "Neighbor disovery" term, makes think
  of "Neighbor Discovery"
-suggest that ND doesn't risk storms of replied RAs to a RS, because
  they're randomly spaced in time.
-suggest that addresses being a direct expression of the underlying
  network topology is a deep Internet assumption that can't be changed.
-ask about necessity of asymmetric support.

For details, when time permits, see below.

> 4.2.  Table Scalability
> 
> Scalability support for large networks of sensors is highlighted as a
>  key requirement by all three application requirements documents.
[...]
> More precisely, routing table size scaling with O(N) or O(L) fails. A
>  table that scales O(D) (assuming no N or L) passes.

This is a problem of representing data structures, and not of the
protocol per se.  I hope some protocol isn't discarded by some
dangerously false assumptions on the way it represents its so-called
tables in the memory.

For example there exist various implementations of Binding Cache (of
MIP) and Neighbor Cache (of ND) which are more or less efficient.  Some
are quick at finding, others at inserting, others are smaller, and so on.

Also related to this:
> For example, a node with 4kB of RAM, a typical amount for top-end 
> microcontrollers, cannot store full neighbor state when it has 1000 
> other nodes nearby.

LEt's see: which addresses IPv4 or IPv6?  How are they represented?  Are
they covered by a long or short prefix length (subnet address)?  Which
link layer?

And is it assumed that a micro-controller needs to talk to 1000
neighbors at the same time?  Because the Neighbor Cache only holds the
neighbors to which a node has recently talked to, there are tweakable
expiry timers.  And I doubt there exists a link layer supporting this
assumption of one-to-1000 simultaneous neighbors communication.

> 4.3.  Loss Response
> 
> In low power and lossy networks, links routinely come and go due to 
> being close to the signal-to-noise threshold at the physical layer. 
> It is important that link churn not trigger unnecessary responses by 
> the routing protocol.
[...]
> A protocol which requires many link changes to propagate across the 
> entire network fails.  Protocols which constrain the scope of 
> information propagation to only when they affect routes to active 
> destinations, or to local neighborhoods, pass.  Protocols which allow
>  proactively path maintenance pass if the choice of which paths to 
> maintain is user-specified.
> 
> More precisely, loss responses that require O(N) transmissions fail, 
> while responses that can rely on O(1) local broadcasts or O(D) route 
> updates pass.

I think Mobile IP-based NEMO protocol should pass this test.  Whenever
the Mobile Router's egress interface comes down or up only the HA (Home
Agent) is let know about it, it's not O(N), it's simply 1.  Besides, it
has a retransmission control specified, such as to not make too much noise.

> 4.4.  Control Cost
[...]
> a common case [I-D.ietf-roll-indus-routing-reqs].  In terms of 
> routing structure, any proposed LLN routing protocol ought to support
>  the autonomous organization and configuration of the network at the 
> lowest possible energy cost [I-D.ietf-roll-urban-routing-reqs].
> 
> All routing protocols must transmit additional data to detect 
> neighbors, build routes, transmit routing tables, or otherwise 
> conduct routing.  As low-power wireless networks can have very low 
> data rates, protocols which require a minimum control packet rate can
>  have an unbounded control overhead per data packet.  This is 
> particularly true for event-driven networks, which only report data 
> when certain conditions are met.  Regions of a network which never 
> meet the condition can be forced to send significant control traffic 
> even when there is no data to send.  For these use cases, hard-coded 
> timing constants are unacceptable, because they imply a prior 
> knowledge of the expected data rate.
> 
> Of course, protocols require the ability to send at least a very 
> small amount of control traffic, in order to discover a topology. But
>  this bootstrapping discovery and maintenance traffic should be 
> small: communicating once an hour is far more reasonable than 
> communicating once a second.  So while control traffic should be 
> bounded by data traffic, it requires some leeway to bootstrap and 
> maintain a long-lived yet idle network.
> 
> In the case of control traffic, the communication rate (sum of 
> transmissions and receptions at a node) is a better measure than the 
> transmission rate (since energy is consumed for both transmissions 
> and receptions).  Controlling the transmission rate is insufficient, 
> as it would mean that the energy cost (sum of transmission and 
> receptions) of control traffic could grow with O(L).
> 
> A protocol fails the control cost criterion if its per-node control 
> traffic (transmissions plus receptions) rate is not bounded by the 
> data rate plus a small constant.

Neighbor Discovery and Mobile IPv6 both have built-in rate limitation
mechanisms.

> For example, a protocol using a beacon rate only passes if it can be
>  turned arbitrarily low, in order to match the data rate.

Both MIP and ND do that.  It's turned arbitrarily low by an
administrator.  I hope that's ok.

> 4.5.  Link and Node Cost
> 
> These two criteria specify how a protocol chooses routes for data 
> packets to take through the network.  Classical routing algorithms 
> typically acknowledge the differing costs of paths and may use a 
> shortest path algorithm to find paths.  This is a requirement for low
>  power networks, as links must be evaluated as part of an objective 
> function across various metric types, such as minimizing latency and
>  maximizing reliability [I-D.ietf-roll-indus-routing-reqs].
> 
> However, in low power networks it is also desirable to account for 
> the cost of forwarding through particular routers.  Applications 
> require node or parameter constrained routing, which takes into 
> account node properties and attributes such as power, memory, and 
> battery life that dictate a router's willingness or ability to route
>  other packets.  Home routing requirements note that devices will
> vary in their duty cycle, and that routing protocols should prefer
> nodes with permanent power [I-D.ietf-roll-home-routing-reqs].  The
> urban requirements note that routing protocols may wish to take
> advantage of differing data processing and management capabilities
> among network devices [I-D.ietf-roll-urban-routing-reqs].  Finally, 
> industrial requirements cite differing lifetime requirements as an 
> important factor to account for [I-D.ietf-roll-indus-routing-reqs]. 
> Node cost refers to the ability for a protocol to incorporate router
>  properties into routing metrics and use node attributes for 
> constraint-based routing.
> 
> A "pass" indicates that the protocol contains a mechanism allowing 
> these considerations to be considered when choosing routes.

Sorry, which considerations more precisely?

Do you mean we don't have a routing metric saying "energy level"/
"memory size"?  Is it this?

If yes I think I could make a separate thread with various reflections
on the topic.

> Neighbor discovery is a critical component of any routing protocol.

Terminology: as already described in the draft, "Neighbor Discovery"
being a specific Internet-area protocol RFC 4861, independent of any
routing protocol (could be called the ARP of IPv6).  Thus reading the
above phrase may make one think ND is a critical component of any
routing protocol - it's not.  The lexical situation is worse knowing
that OSPF calls a Neighbor _almost_ the same thing as an ND neighbor.

As such, the above phrase is very difficult to parse.

> 8.1.  IPv6 Neighbor Discovery
> 
> IPv6 neighbor discovery provides mechanisms for nodes to discover 
> single-hop neighbors as well as routers that can forward packets past
>  the local neighborhood.  There is an implicit assumption that the 
> delegation of whether a node is a router or not is static (e.g., 
> based on a wired topology).  The fact that all routers must respond 
> to a Router Solicitation requires that the number of routers with a 
> 1-hop neighborhood is small, or there will be a reply implosion.

RAs sent in response to a RS are randomly spaced in time, tunable timer, 
thus I would qualify that neither as explosion nor as implosion, because 
they're not simultaneous.  ND specifiers often complained about 'storms' 
they experienced with faulty cards and ARP and thus felt ND could do 
better, I think it went on ok.

> Furthermore, IPv6 neighbor discovery's support of address 
> autoconfiguration assumes address provisioning, in that addresses 
> reflect the underlying communication topology.

I'm afraid this touches on a fundamental Internet design: yes addresses
reflect the underlying communication topology.  So what?  I hope the
intention is not to design some protocol which assumes the addresses do
not reflect the underlying communication topology.

I'm afraid we may have a big big misunderstanding here.

> IPv6 neighbor discovery does not consider asymmetric links.

And?  Does ROLL consider asymmetric links?  Which ones?  In what are
they asymmetric?  Bandwidth?  Reachability?  MTU?

For example, whereas WiFi radio channel may look asymmetric bandwidth
ul/dl (from the MAC layer), when the ND looks at that MAC it sees it
symmetric.

Maybe ND is enough for these apparently asymmetric links?

> Nevertheless, it may be possible to extend and adapt IPv6's 
> mechanisms to wireless in order to avoid response storms and 
> implosions.

I think this has already been done with many protocols in IPv6 space.
ND is a typical example, but also Mobile IPv6.  I think OSPF for IPv6
also has means to avoid storms and implosions.

Or I don't understand at all the requirement.

Alex

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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Ian,<br>
&nbsp; It is really not reasonable to expect the authors to rev the document
to track a moving target.&nbsp; That was precisely the reason that we had a
clear cut off.&nbsp; Folks, including yourself, complained that it was too
restrictive and we broadened it to include protocols that were still in
draft.&nbsp; In addition, this concern of the survey never ending because
there is always something new that might be considered, especially
those that are reved in response to the survey analysis, is also why it
is important that we accept the draft and complete the recharter so
that the working group, including folks like yourself, can start the
process of reving protocols or considering new ones.&nbsp; I have asked the
authors not to consider requests to look at new drafts.<br>
<br>
David<br>
<br>
Ian Chakeres wrote:
<blockquote
 cite="mid:374005f30901290757j1c37c25dpa22d67b0e1485747@mail.gmail.com"
 type="cite">
  <pre wrap="">Philip, I am glad to see another revision of the protocol-survey - but
I am disappointed to see that many of my comments were ignored and
several errors remain.

I've included the contents of my earlier email about the errors below.

Sincerely,
Ian Chakeres

===START===
I examined draft-ietf-roll-protocol-survey-03. I found most of my
earlier comments addressed, but I believe there are still a few more
items that need to be changed.

DYMO's distance metric allows representation of link and node cost,
along with other cost factors. Although "node" and "link" cost are not
explicitly called out in the DYMO ID, the distance value associated
with routing information can be modified before consideration for
inclusion in the routing table as well as prior to sending routing
information. The roll-protocol-survey document and summary table
should be updated accordingly.

DYMO-16 does not require, but does by default encourage
sending/forwarding of RERR. Please modify Section 12 accordingly. I
believe this change also effects the loss response rating for DYMO in
the summary table.

I think all '-low' should be removed from the protocol-survey.

Finally, I did not see any change in Section 4.2, which I believe
others also agreed was not clear.

Here was my original comment

"""
In Section 4.2, the motivation provided is the possibly large network
size (250-millions) and deep network (20 hops). Network size and
routing information size do not have a direct connection when
hierarchical addressing is used. Perhaps this motivation could be
removed and simply the last sentence kept. Given this change maybe the
suitability metric should become routing table size, instead of table
scalability.
"""
===END===

On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <a class="moz-txt-link-rfc2396E" href="mailto:pal@cs.stanford.edu">&lt;pal@cs.stanford.edu&gt;</a> wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">On Jan 26, 2009, at 4:00 PM, <a class="moz-txt-link-abbreviated" href="mailto:Internet-Drafts@ietf.org">Internet-Drafts@ietf.org</a> wrote:

    </pre>
    <blockquote type="cite">
      <pre wrap="">A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Routing Over Low power and Lossy networks
Working Group of the IETF.

       Title           : Overview of Existing Routing Protocols for Low
Power and Lossy Networks
       Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
       Filename        : draft-ietf-roll-protocols-survey-05.txt
       Pages           : 26
       Date            : 2009-1-26
      </pre>
    </blockquote>
    <pre wrap="">Edits:

Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.

Fixed incorrect table values for OLSRv2. Triggered updates are optional, so
loss is a ?.

Changed "Suitability Summary" to "Criteria"

Fixed O(R + e) to O(R) + e.

Removed redundant paragraph in 4.4 "The control cost criterion is a
necessary but not..."

Made IETF scope more specific ("any protocol" -&gt; "any protocol outside the
IETF").

Added errata to terminology section ("NOT RECOMMENDED").

Cleaned up RFC/draft terminology in Section 4.

Clarified "unbounded" control overhead.

Explained 4kB of RAM.

Phil





_______________________________________________
Roll mailing list
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    </pre>
  </blockquote>
  <pre wrap=""><!---->_______________________________________________
Roll mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Roll@ietf.org">Roll@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/roll">https://www.ietf.org/mailman/listinfo/roll</a>
  </pre>
</blockquote>
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From roll-bounces@ietf.org  Fri Jan 30 01:09:31 2009
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David I thought to propose that comments be tracked, with the Issue
Tracker :

        http://trac.tools.ietf.org/wg/roll/trac/report/1

It could help stabilize the target.  One could select a person to take
care of this.

Alex

David E. Culler a =E9crit :
> Ian, It is really not reasonable to expect the authors to rev the =

> document to track a moving target.  That was precisely the reason =

> that we had a clear cut off.  Folks, including yourself, complained =

> that it was too restrictive and we broadened it to include protocols =

> that were still in draft.  In addition, this concern of the survey =

> never ending because there is always something new that might be =

> considered, especially those that are reved in response to the survey
>  analysis, is also why it is important that we accept the draft and =

> complete the recharter so that the working group, including folks =

> like yourself, can start the process of reving protocols or =

> considering new ones.  I have asked the authors not to consider =

> requests to look at new drafts.
> =

> David
> =

> Ian Chakeres wrote:
>> Philip, I am glad to see another revision of the protocol-survey - =

>> but I am disappointed to see that many of my comments were ignored =

>> and several errors remain.
>> =

>> I've included the contents of my earlier email about the errors =

>> below.
>> =

>> Sincerely, Ian Chakeres
>> =

>> =3D=3D=3DSTART=3D=3D=3D I examined draft-ietf-roll-protocol-survey-03. I=
 found =

>> most of my earlier comments addressed, but I believe there are =

>> still a few more items that need to be changed.
>> =

>> DYMO's distance metric allows representation of link and node cost,
>>  along with other cost factors. Although "node" and "link" cost are
>>  not explicitly called out in the DYMO ID, the distance value =

>> associated with routing information can be modified before =

>> consideration for inclusion in the routing table as well as prior =

>> to sending routing information. The roll-protocol-survey document =

>> and summary table should be updated accordingly.
>> =

>> DYMO-16 does not require, but does by default encourage =

>> sending/forwarding of RERR. Please modify Section 12 accordingly. I
>>  believe this change also effects the loss response rating for DYMO
>>  in the summary table.
>> =

>> I think all '-low' should be removed from the protocol-survey.
>> =

>> Finally, I did not see any change in Section 4.2, which I believe =

>> others also agreed was not clear.
>> =

>> Here was my original comment
>> =

>> """ In Section 4.2, the motivation provided is the possibly large =

>> network size (250-millions) and deep network (20 hops). Network =

>> size and routing information size do not have a direct connection =

>> when hierarchical addressing is used. Perhaps this motivation could
>>  be removed and simply the last sentence kept. Given this change =

>> maybe the suitability metric should become routing table size, =

>> instead of table scalability. """ =3D=3D=3DEND=3D=3D=3D
>> =

>> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu>
>>  wrote:
>> =

>>> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>>> =

>>> =

>>>> A New Internet-Draft is available from the on-line =

>>>> Internet-Drafts directories. This draft is a work item of the =

>>>> Routing Over Low power and Lossy networks Working Group of the =

>>>> IETF.
>>>> =

>>>> Title           : Overview of Existing Routing Protocols for =

>>>> Low Power and Lossy Networks Author(s)       : A. Tavakoli, S. =

>>>> Dawson-Haggerty, P. Levis Filename        : =

>>>> draft-ietf-roll-protocols-survey-05.txt Pages           : 26 =

>>>> Date            : 2009-1-26
>>>> =

>>> Edits:
>>> =

>>> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>>> =

>>> =

>>> =

>>> Fixed incorrect table values for OLSRv2. Triggered updates are =

>>> optional, so loss is a ?.
>>> =

>>> Changed "Suitability Summary" to "Criteria"
>>> =

>>> Fixed O(R + e) to O(R) + e.
>>> =

>>> Removed redundant paragraph in 4.4 "The control cost criterion is
>>>  a necessary but not..."
>>> =

>>> Made IETF scope more specific ("any protocol" -> "any protocol =

>>> outside the IETF").
>>> =

>>> Added errata to terminology section ("NOT RECOMMENDED").
>>> =

>>> Cleaned up RFC/draft terminology in Section 4.
>>> =

>>> Clarified "unbounded" control overhead.
>>> =

>>> Explained 4kB of RAM.
>>> =

>>> Phil
>>> =

>>> =

>>> =

>>> =

>>> =

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

>>> =

>> _______________________________________________ Roll mailing list =

>> Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
>> =

> =

> ------------------------------------------------------------------------
> =

> =

> =

> _______________________________________________ Roll mailing list =

> Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll

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Ian Chakeres a =E9crit :
[...]
> In Section 4.2, the motivation provided is the possibly large network
>  size (250-millions) and deep network (20 hops). Network size and =

> routing information size do not have a direct connection when =

> hierarchical addressing is used.

Ian, I agree with the above - network size and routing information size
are not directly related - it largely depends on how the subnet
structure and the addressing architecture are conceived.

> Perhaps this motivation could be removed and simply the last sentence
>  kept. Given this change maybe the suitability metric should become =

> routing table size, instead of table scalability. """ =3D=3D=3DEND=3D=3D=
=3D

I'm not sure I understand which 'last sentence' to be kept?

Alex

> =

> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu> =

> wrote:
>> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>> =

>>> A New Internet-Draft is available from the on-line =

>>> Internet-Drafts directories. This draft is a work item of the =

>>> Routing Over Low power and Lossy networks Working Group of the =

>>> IETF.
>>> =

>>> Title           : Overview of Existing Routing Protocols for Low =

>>> Power and Lossy Networks Author(s)       : A. Tavakoli, S. =

>>> Dawson-Haggerty, P. Levis Filename        : =

>>> draft-ietf-roll-protocols-survey-05.txt Pages           : 26 Date
>>>  : 2009-1-26
>> Edits:
>> =

>> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>> =

>> Fixed incorrect table values for OLSRv2. Triggered updates are =

>> optional, so loss is a ?.
>> =

>> Changed "Suitability Summary" to "Criteria"
>> =

>> Fixed O(R + e) to O(R) + e.
>> =

>> Removed redundant paragraph in 4.4 "The control cost criterion is a
>>  necessary but not..."
>> =

>> Made IETF scope more specific ("any protocol" -> "any protocol =

>> outside the IETF").
>> =

>> Added errata to terminology section ("NOT RECOMMENDED").
>> =

>> Cleaned up RFC/draft terminology in Section 4.
>> =

>> Clarified "unbounded" control overhead.
>> =

>> Explained 4kB of RAM.
>> =

>> Phil
>> =

>> =

>> =

>> =

>> =

>> _______________________________________________ Roll mailing list =

>> Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
>> =

> _______________________________________________ Roll mailing list =

> Roll@ietf.org https://www.ietf.org/mailman/listinfo/roll
> =


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Date: Fri, 30 Jan 2009 09:26:17 -0500
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From: Ian Chakeres <ian.chakeres@gmail.com>
To: "David E. Culler" <culler@eecs.berkeley.edu>
Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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I respectfuly disagree.

I think it a mistake to attempt to publish this document when it
contains information that is clearly inaccurate.

Sincerely,
Ian Chakeres

On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
<culler@eecs.berkeley.edu> wrote:
> Ian,
>   It is really not reasonable to expect the authors to rev the document to
> track a moving target.  That was precisely the reason that we had a clear
> cut off.  Folks, including yourself, complained that it was too restrictive
> and we broadened it to include protocols that were still in draft.  In
> addition, this concern of the survey never ending because there is always
> something new that might be considered, especially those that are reved in
> response to the survey analysis, is also why it is important that we accept
> the draft and complete the recharter so that the working group, including
> folks like yourself, can start the process of reving protocols or
> considering new ones.  I have asked the authors not to consider requests to
> look at new drafts.
>
> David
>
> Ian Chakeres wrote:
>
> Philip, I am glad to see another revision of the protocol-survey - but
> I am disappointed to see that many of my comments were ignored and
> several errors remain.
>
> I've included the contents of my earlier email about the errors below.
>
> Sincerely,
> Ian Chakeres
>
> ===START===
> I examined draft-ietf-roll-protocol-survey-03. I found most of my
> earlier comments addressed, but I believe there are still a few more
> items that need to be changed.
>
> DYMO's distance metric allows representation of link and node cost,
> along with other cost factors. Although "node" and "link" cost are not
> explicitly called out in the DYMO ID, the distance value associated
> with routing information can be modified before consideration for
> inclusion in the routing table as well as prior to sending routing
> information. The roll-protocol-survey document and summary table
> should be updated accordingly.
>
> DYMO-16 does not require, but does by default encourage
> sending/forwarding of RERR. Please modify Section 12 accordingly. I
> believe this change also effects the loss response rating for DYMO in
> the summary table.
>
> I think all '-low' should be removed from the protocol-survey.
>
> Finally, I did not see any change in Section 4.2, which I believe
> others also agreed was not clear.
>
> Here was my original comment
>
> """
> In Section 4.2, the motivation provided is the possibly large network
> size (250-millions) and deep network (20 hops). Network size and
> routing information size do not have a direct connection when
> hierarchical addressing is used. Perhaps this motivation could be
> removed and simply the last sentence kept. Given this change maybe the
> suitability metric should become routing table size, instead of table
> scalability.
> """
> ===END===
>
> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu> wrote:
>
>
> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Routing Over Low power and Lossy networks
> Working Group of the IETF.
>
>        Title           : Overview of Existing Routing Protocols for Low
> Power and Lossy Networks
>        Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>        Filename        : draft-ietf-roll-protocols-survey-05.txt
>        Pages           : 26
>        Date            : 2009-1-26
>
>
> Edits:
>
> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>
> Fixed incorrect table values for OLSRv2. Triggered updates are optional, so
> loss is a ?.
>
> Changed "Suitability Summary" to "Criteria"
>
> Fixed O(R + e) to O(R) + e.
>
> Removed redundant paragraph in 4.4 "The control cost criterion is a
> necessary but not..."
>
> Made IETF scope more specific ("any protocol" -> "any protocol outside the
> IETF").
>
> Added errata to terminology section ("NOT RECOMMENDED").
>
> Cleaned up RFC/draft terminology in Section 4.
>
> Clarified "unbounded" control overhead.
>
> Explained 4kB of RAM.
>
> Phil
>
>
>
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>
>
>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll
>
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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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On Jan 30, 2009, at 6:26 AM, Ian Chakeres wrote:

> I respectfuly disagree.
>
> I think it a mistake to attempt to publish this document when it
> contains information that is clearly inaccurate.
>
> Sincerely,
> Ian Chakeres
>
> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
> <culler@eecs.berkeley.edu> wrote:
>> Ian,
>>  It is really not reasonable to expect the authors to rev the  
>> document to
>> track a moving target.  That was precisely the reason that we had a  
>> clear
>> cut off.  Folks, including yourself, complained that it was too  
>> restrictive
>> and we broadened it to include protocols that were still in draft.   
>> In
>> addition, this concern of the survey never ending because there is  
>> always
>> something new that might be considered, especially those that are  
>> reved in
>> response to the survey analysis, is also why it is important that  
>> we accept
>> the draft and complete the recharter so that the working group,  
>> including
>> folks like yourself, can start the process of reving protocols or
>> considering new ones.  I have asked the authors not to consider  
>> requests to
>> look at new drafts.

We have two options:

1) consider DYMO as of its stable state (-15), or
2) remove DYMO from the document because it is not stable.

The reason behind 2) is that the specification has not been  
implemented, tested, nor does it have any running code that indicates  
the specification is sound. Imagine delaying ROLL for a year because a  
protocol looks promising but turns out to not work. *That* would make  
the document inaccurate in a meaningful way.

I'd much rather give DYMO the credit and relevance it is due and go  
with 1).

Phil
_______________________________________________
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Date: Fri, 30 Jan 2009 11:12:26 -0500
Message-ID: <374005f30901300812v48c5d069kfa6ec6bb1045da3f@mail.gmail.com>
From: Ian Chakeres <ian.chakeres@gmail.com>
To: Philip Levis <pal@cs.stanford.edu>
Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>, "David E. Culler" <culler@eecs.berkeley.edu>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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How about another option - update the document based on the current
specification?

I believe that the recent changes have been relatively minor. They
mainly explain and indicate to an implementer where added flexibility
exists. I even brought several of these items to your attention during
a face-to-face discussion in Dublin about the protocol-survey.

Ian Chakeres

On Fri, Jan 30, 2009 at 11:01 AM, Philip Levis <pal@cs.stanford.edu> wrote:
>
> On Jan 30, 2009, at 6:26 AM, Ian Chakeres wrote:
>
>> I respectfuly disagree.
>>
>> I think it a mistake to attempt to publish this document when it
>> contains information that is clearly inaccurate.
>>
>> Sincerely,
>> Ian Chakeres
>>
>> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
>> <culler@eecs.berkeley.edu> wrote:
>>>
>>> Ian,
>>>  It is really not reasonable to expect the authors to rev the document to
>>> track a moving target.  That was precisely the reason that we had a clear
>>> cut off.  Folks, including yourself, complained that it was too
>>> restrictive
>>> and we broadened it to include protocols that were still in draft.  In
>>> addition, this concern of the survey never ending because there is always
>>> something new that might be considered, especially those that are reved
>>> in
>>> response to the survey analysis, is also why it is important that we
>>> accept
>>> the draft and complete the recharter so that the working group, including
>>> folks like yourself, can start the process of reving protocols or
>>> considering new ones.  I have asked the authors not to consider requests
>>> to
>>> look at new drafts.
>
> We have two options:
>
> 1) consider DYMO as of its stable state (-15), or
> 2) remove DYMO from the document because it is not stable.
>
> The reason behind 2) is that the specification has not been implemented,
> tested, nor does it have any running code that indicates the specification
> is sound. Imagine delaying ROLL for a year because a protocol looks
> promising but turns out to not work. *That* would make the document
> inaccurate in a meaningful way.
>
> I'd much rather give DYMO the credit and relevance it is due and go with 1).
>
> Phil
>
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Cc: "David E. Culler" <culler@eecs.berkeley.edu>, ROLL WG <roll@ietf.org>, Ross Callon <rcallon@juniper.net>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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All -

If there are gross errors in any specification, the ADs and then the  
IESG will send a doc back to the WG to correct them.  The best a doc  
can do with a moving target is cite specific revisions of specs and  
call out "as of ZZZZ/YY/XX date" but, the data has to be correctly  
reflecting the cited material. In addition,  the protocol survey can  
make it clear that the ROLL WG is engaging with other WGs based upon  
the analysis performed and that other protocols are changing based on  
the outcome and cite where to go and find the latest and greatest  
information.

HIH

-DWard


On Jan 30, 2009, at 8:26 AM, Ian Chakeres wrote:

> I respectfuly disagree.
>
> I think it a mistake to attempt to publish this document when it
> contains information that is clearly inaccurate.
>
> Sincerely,
> Ian Chakeres
>
> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
> <culler@eecs.berkeley.edu> wrote:
>> Ian,
>>  It is really not reasonable to expect the authors to rev the  
>> document to
>> track a moving target.  That was precisely the reason that we had a  
>> clear
>> cut off.  Folks, including yourself, complained that it was too  
>> restrictive
>> and we broadened it to include protocols that were still in draft.   
>> In
>> addition, this concern of the survey never ending because there is  
>> always
>> something new that might be considered, especially those that are  
>> reved in
>> response to the survey analysis, is also why it is important that  
>> we accept
>> the draft and complete the recharter so that the working group,  
>> including
>> folks like yourself, can start the process of reving protocols or
>> considering new ones.  I have asked the authors not to consider  
>> requests to
>> look at new drafts.
>>
>> David
>>
>> Ian Chakeres wrote:
>>
>> Philip, I am glad to see another revision of the protocol-survey -  
>> but
>> I am disappointed to see that many of my comments were ignored and
>> several errors remain.
>>
>> I've included the contents of my earlier email about the errors  
>> below.
>>
>> Sincerely,
>> Ian Chakeres
>>
>> ===START===
>> I examined draft-ietf-roll-protocol-survey-03. I found most of my
>> earlier comments addressed, but I believe there are still a few more
>> items that need to be changed.
>>
>> DYMO's distance metric allows representation of link and node cost,
>> along with other cost factors. Although "node" and "link" cost are  
>> not
>> explicitly called out in the DYMO ID, the distance value associated
>> with routing information can be modified before consideration for
>> inclusion in the routing table as well as prior to sending routing
>> information. The roll-protocol-survey document and summary table
>> should be updated accordingly.
>>
>> DYMO-16 does not require, but does by default encourage
>> sending/forwarding of RERR. Please modify Section 12 accordingly. I
>> believe this change also effects the loss response rating for DYMO in
>> the summary table.
>>
>> I think all '-low' should be removed from the protocol-survey.
>>
>> Finally, I did not see any change in Section 4.2, which I believe
>> others also agreed was not clear.
>>
>> Here was my original comment
>>
>> """
>> In Section 4.2, the motivation provided is the possibly large network
>> size (250-millions) and deep network (20 hops). Network size and
>> routing information size do not have a direct connection when
>> hierarchical addressing is used. Perhaps this motivation could be
>> removed and simply the last sentence kept. Given this change maybe  
>> the
>> suitability metric should become routing table size, instead of table
>> scalability.
>> """
>> ===END===
>>
>> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu>  
>> wrote:
>>
>>
>> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>>
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy  
>> networks
>> Working Group of the IETF.
>>
>>       Title           : Overview of Existing Routing Protocols for  
>> Low
>> Power and Lossy Networks
>>       Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>>       Filename        : draft-ietf-roll-protocols-survey-05.txt
>>       Pages           : 26
>>       Date            : 2009-1-26
>>
>>
>> Edits:
>>
>> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>>
>> Fixed incorrect table values for OLSRv2. Triggered updates are  
>> optional, so
>> loss is a ?.
>>
>> Changed "Suitability Summary" to "Criteria"
>>
>> Fixed O(R + e) to O(R) + e.
>>
>> Removed redundant paragraph in 4.4 "The control cost criterion is a
>> necessary but not..."
>>
>> Made IETF scope more specific ("any protocol" -> "any protocol  
>> outside the
>> IETF").
>>
>> Added errata to terminology section ("NOT RECOMMENDED").
>>
>> Cleaned up RFC/draft terminology in Section 4.
>>
>> Clarified "unbounded" control overhead.
>>
>> Explained 4kB of RAM.
>>
>> Phil
>>
>>
>>
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>

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I would vote to limit the scope of the ROLL document to the -15 version
of DYMO and proceed. As was noted earlier, this could lead to an
unending churn of the document. While differences in the -15 to -16
version of DYMO may be manageable, this creates a precedent that IMO
would lead to stalling the effort due to document churn. It's just not
workable in the general case.  

Regards,
Stan
 

-----Original Message-----
From: roll-bounces@ietf.org [mailto:roll-bounces@ietf.org] On Behalf Of
Ian Chakeres
Sent: Friday, January 30, 2009 11:12 AM
To: Philip Levis
Cc: Ross Callon; ROLL WG; David E. Culler
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt

How about another option - update the document based on the current
specification?

I believe that the recent changes have been relatively minor. They
mainly explain and indicate to an implementer where added flexibility
exists. I even brought several of these items to your attention during a
face-to-face discussion in Dublin about the protocol-survey.

Ian Chakeres

On Fri, Jan 30, 2009 at 11:01 AM, Philip Levis <pal@cs.stanford.edu>
wrote:
>
> On Jan 30, 2009, at 6:26 AM, Ian Chakeres wrote:
>
>> I respectfuly disagree.
>>
>> I think it a mistake to attempt to publish this document when it 
>> contains information that is clearly inaccurate.
>>
>> Sincerely,
>> Ian Chakeres
>>
>> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler 
>> <culler@eecs.berkeley.edu> wrote:
>>>
>>> Ian,
>>>  It is really not reasonable to expect the authors to rev the 
>>> document to track a moving target.  That was precisely the reason 
>>> that we had a clear cut off.  Folks, including yourself, complained 
>>> that it was too restrictive and we broadened it to include protocols

>>> that were still in draft.  In addition, this concern of the survey 
>>> never ending because there is always something new that might be 
>>> considered, especially those that are reved in response to the 
>>> survey analysis, is also why it is important that we accept the 
>>> draft and complete the recharter so that the working group, 
>>> including folks like yourself, can start the process of reving 
>>> protocols or considering new ones.  I have asked the authors not to 
>>> consider requests to look at new drafts.
>
> We have two options:
>
> 1) consider DYMO as of its stable state (-15), or
> 2) remove DYMO from the document because it is not stable.
>
> The reason behind 2) is that the specification has not been 
> implemented, tested, nor does it have any running code that indicates 
> the specification is sound. Imagine delaying ROLL for a year because a

> protocol looks promising but turns out to not work. *That* would make 
> the document inaccurate in a meaningful way.
>
> I'd much rather give DYMO the credit and relevance it is due and go
with 1).
>
> Phil
>
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> We have two options:
>
> 1) consider DYMO as of its stable state (-15), or

Surely the stable state is -16, that's the latest published
version, -15 is superseded. If you quote and use -15 I think
you ought to add a date to the ROLL report indicating when
you froze consideration.

> Imagine delaying ROLL for a year because a  
> protocol looks promising but turns out to not work. *That* would make

> the document inaccurate in a meaningful way.

That strikes me as a straw man. Is anyone suggesting this -15/-16
issue is going to delay ROLL a year? That could only be the case
if -16 were suddenly getting Pass across the table, which I don't
think is the case.

Note: I see, just as I was about to send this, that David Ward has
just suggested the date approach.

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From: Thomas Heide Clausen <ietf@thomasclausen.org>
Date: Fri, 30 Jan 2009 17:32:44 +0100
To: Ian Chakeres <ian.chakeres@gmail.com>
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Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>, "David E. Culler" <culler@eecs.berkeley.edu>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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I would like to second Ian on this front.

I believe that, for one thing, the DYMO distance metric is something  
which goes way back -- at least, I remember having discussed it with  
respect to "node cost" in OLSR and how it maps into DYMO.AODV a long  
while back, only to realize what Ian also points out in this email:  
the distance metric can be set to consider both "link cost" and "node  
cost". As such, and on that front, I do not thing that this is a  
"moving target" but rather is something that should be corrected.

As for the rest of Ian's comments, I agree with those.

I also respectfully suggest that we not publish a document containing  
inaccurate information -- especially when such is pointed out on the  
list.

Note, I have reviewing the -05 version of this I-D high on my todo  
list, but other IETF matters have kept me busy these past days. I'll  
try to get through it over the weekend, and will post my comments  
here (despite those in the past having been explicitly qualified as  
"disruptive").

Sincerely,

Thomas

On Jan 30, 2009, at 15:26 PM, Ian Chakeres wrote:

> I respectfuly disagree.
>
> I think it a mistake to attempt to publish this document when it
> contains information that is clearly inaccurate.
>
> Sincerely,
> Ian Chakeres
>
> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
> <culler@eecs.berkeley.edu> wrote:
>> Ian,
>>   It is really not reasonable to expect the authors to rev the  
>> document to
>> track a moving target.  That was precisely the reason that we had  
>> a clear
>> cut off.  Folks, including yourself, complained that it was too  
>> restrictive
>> and we broadened it to include protocols that were still in  
>> draft.  In
>> addition, this concern of the survey never ending because there is  
>> always
>> something new that might be considered, especially those that are  
>> reved in
>> response to the survey analysis, is also why it is important that  
>> we accept
>> the draft and complete the recharter so that the working group,  
>> including
>> folks like yourself, can start the process of reving protocols or
>> considering new ones.  I have asked the authors not to consider  
>> requests to
>> look at new drafts.
>>
>> David
>>
>> Ian Chakeres wrote:
>>
>> Philip, I am glad to see another revision of the protocol-survey -  
>> but
>> I am disappointed to see that many of my comments were ignored and
>> several errors remain.
>>
>> I've included the contents of my earlier email about the errors  
>> below.
>>
>> Sincerely,
>> Ian Chakeres
>>
>> ===START===
>> I examined draft-ietf-roll-protocol-survey-03. I found most of my
>> earlier comments addressed, but I believe there are still a few more
>> items that need to be changed.
>>
>> DYMO's distance metric allows representation of link and node cost,
>> along with other cost factors. Although "node" and "link" cost are  
>> not
>> explicitly called out in the DYMO ID, the distance value associated
>> with routing information can be modified before consideration for
>> inclusion in the routing table as well as prior to sending routing
>> information. The roll-protocol-survey document and summary table
>> should be updated accordingly.
>>
>> DYMO-16 does not require, but does by default encourage
>> sending/forwarding of RERR. Please modify Section 12 accordingly. I
>> believe this change also effects the loss response rating for DYMO in
>> the summary table.
>>
>> I think all '-low' should be removed from the protocol-survey.
>>
>> Finally, I did not see any change in Section 4.2, which I believe
>> others also agreed was not clear.
>>
>> Here was my original comment
>>
>> """
>> In Section 4.2, the motivation provided is the possibly large network
>> size (250-millions) and deep network (20 hops). Network size and
>> routing information size do not have a direct connection when
>> hierarchical addressing is used. Perhaps this motivation could be
>> removed and simply the last sentence kept. Given this change maybe  
>> the
>> suitability metric should become routing table size, instead of table
>> scalability.
>> """
>> ===END===
>>
>> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis  
>> <pal@cs.stanford.edu> wrote:
>>
>>
>> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>>
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Routing Over Low power and Lossy  
>> networks
>> Working Group of the IETF.
>>
>>        Title           : Overview of Existing Routing Protocols  
>> for Low
>> Power and Lossy Networks
>>        Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>>        Filename        : draft-ietf-roll-protocols-survey-05.txt
>>        Pages           : 26
>>        Date            : 2009-1-26
>>
>>
>> Edits:
>>
>> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>>
>> Fixed incorrect table values for OLSRv2. Triggered updates are  
>> optional, so
>> loss is a ?.
>>
>> Changed "Suitability Summary" to "Criteria"
>>
>> Fixed O(R + e) to O(R) + e.
>>
>> Removed redundant paragraph in 4.4 "The control cost criterion is a
>> necessary but not..."
>>
>> Made IETF scope more specific ("any protocol" -> "any protocol  
>> outside the
>> IETF").
>>
>> Added errata to terminology section ("NOT RECOMMENDED").
>>
>> Cleaned up RFC/draft terminology in Section 4.
>>
>> Clarified "unbounded" control overhead.
>>
>> Explained 4kB of RAM.
>>
>> Phil
>>
>>
>>
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
>>
>>
>> _______________________________________________
>> Roll mailing list
>> Roll@ietf.org
>> https://www.ietf.org/mailman/listinfo/roll
>>
> _______________________________________________
> Roll mailing list
> Roll@ietf.org
> https://www.ietf.org/mailman/listinfo/roll

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Hi Jerry,

On Jan 23, 2009, at 10:29 PM, Jerald.P.Martocci@jci.com wrote:


>> 10) "Communication to these mostly sleeping devices MUST be 
>> bidirectional."
>> JP> Please be more specific. Do you mean by the routing protocol 
>> MUST be able to compute bi-directional route to sleeping devices ? 
>> Why ?
>> Yes and No.  You're actually asking two questions in your question...
>>
>>
>Yes we leave in a constrained environment ;-))
>> With regard to sleeping devices, the routing protocol must allow for 
>> delivering messages to an assigned (awake) proxy device who will 
>> later transmit the information to the sleeping device upon its 
>> awaking.  I've actually addressed this as a separate requirement.
>>
>>
>Indeed.
>> With regard to bidirectionality, I am simply saying that sensors 
>> must be able to receive application ACKs and other configuration 
>> data from its controller.  Some protocols (such as EnOcean) support 
>> only unidirectional messaging from the sensor to the controller. 
>> This might work for a lightweight application such as a wireless 
>> light switch turning on a light, but will not work for most of the 
>> commercial applications where the sensor must know that the packet 
>> has been successfully transmitted to the controller (say in a Fire 
>> application).
>>
>>
>Which does not necessarily mean a bi-directional route though. As you 
>know most of routing protocols are computing unidirectional routes 
>(fortunately!)
>
>> I've changed the text to read ...
>>
>> Communication to  sleeping devices MUST be bidirectional to allow 
>> for guaranteed packet delivery from the sensor to the controller.
>>
>Which is clearer but I still have an issue since this is a routing 
>requirement. I do not think that you require the routing protocol to 
>compute bi-directional routes. I understand that the communication 
>must be bi-directional thus this does not add any routing requirements 
>in addition to being able to compute routes from a node A to a node B 
>(and vice versa of course). Thus this sentence can be deleted, it is 
>already covered.
>>

NR=> Building systems must allow for BOTH battery-less sensors (e.g. a 
self-powered switch), supporting only unidirectional messaging, as well as 
regular sensors, supporting (and/or requiring) bi-directional messaging. 
Nevertheless, I think it is more a matter of implementation issue of the 
sleeping device's proxy than a specific routing requirement. As JP 
suggested, I think we can delete this sentence. 

Best Regards,
Nicolas.

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<br><font size=2><tt>Hi Jerry,</tt></font>
<br>
<br><font size=2><tt>On Jan 23, 2009, at 10:29 PM, Jerald.P.Martocci@jci.com
wrote:<br>
<br>
</tt></font>
<br><font size=2><tt>&gt;&gt; 10) &quot;Communication to these mostly sleeping
devices MUST be &nbsp;<br>
&gt;&gt; bidirectional.&quot;<br>
&gt;&gt; JP&gt; Please be more specific. Do you mean by the routing protocol
&nbsp;<br>
&gt;&gt; MUST be able to compute bi-directional route to sleeping devices
? &nbsp;<br>
&gt;&gt; Why ?<br>
&gt;&gt; Yes and No. &nbsp;You're actually asking two questions in your
question...<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Yes we leave in a constrained environment ;-))<br>
&gt;&gt; With regard to sleeping devices, the routing protocol must allow
for &nbsp;<br>
&gt;&gt; delivering messages to an assigned (awake) proxy device who will
&nbsp;<br>
&gt;&gt; later transmit the information to the sleeping device upon its
&nbsp;<br>
&gt;&gt; awaking. &nbsp;I've actually addressed this as a separate requirement.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Indeed.<br>
&gt;&gt; With regard to bidirectionality, I am simply saying that sensors
&nbsp;<br>
&gt;&gt; must be able to receive application ACKs and other configuration
&nbsp;<br>
&gt;&gt; data from its controller. &nbsp;Some protocols (such as EnOcean)
support &nbsp;<br>
&gt;&gt; only unidirectional messaging from the sensor to the controller.
&nbsp; <br>
&gt;&gt; This might work for a lightweight application such as a wireless
&nbsp;<br>
&gt;&gt; light switch turning on a light, but will not work for most of
the &nbsp;<br>
&gt;&gt; commercial applications where the sensor must know that the packet
&nbsp;<br>
&gt;&gt; has been successfully transmitted to the controller (say in a
Fire &nbsp;<br>
&gt;&gt; application).<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Which does not necessarily mean a bi-directional route though. As you
&nbsp;<br>
&gt;know most of routing protocols are computing unidirectional routes
&nbsp;<br>
&gt;(fortunately!)<br>
&gt;<br>
&gt;&gt; I've changed the text to read ...<br>
&gt;&gt;<br>
&gt;&gt; Communication to &nbsp;sleeping devices MUST be bidirectional
to allow &nbsp;<br>
&gt;&gt; for guaranteed packet delivery from the sensor to the controller.<br>
&gt;&gt;<br>
&gt;Which is clearer but I still have an issue since this is a routing
&nbsp;<br>
&gt;requirement. I do not think that you require the routing protocol to
&nbsp;<br>
&gt;compute bi-directional routes. I understand that the communication
&nbsp;<br>
&gt;must be bi-directional thus this does not add any routing requirements
&nbsp;<br>
&gt;in addition to being able to compute routes from a node A to a node
B &nbsp;<br>
&gt;(and vice versa of course). Thus this sentence can be deleted, it is
&nbsp;<br>
&gt;already covered.<br>
&gt;&gt;<br>
</tt></font>
<br><font size=2 face="sans-serif">NR=&gt; Building systems must allow
for BOTH battery-less sensors (e.g. a self-powered switch), supporting
only unidirectional messaging, as well as regular sensors, supporting (and/or
requiring) bi-directional messaging. Nevertheless, I think it is more a
matter of implementation issue of the sleeping device's proxy than a specific
routing requirement. As JP suggested, I think we can delete this sentence.
</font>
<br>
<br><font size=2 face="sans-serif">Best Regards,</font>
<br><font size=2 face="sans-serif">Nicolas.<br>
</font>
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Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Absolutely agree that it should be as accurate as possible.  If the 
changes were minor then it should not matter much if the snapshot were 
dymo -15 or dymo -16.  But my understanding is that these changes are 
not minor.  They reflect significant protocol enhancements in part to 
address the observations that arose as part of doing the survey.  This 
is wonderful progress.  We'd love to have a better dymo and we'd love to 
have a better dymo provide a roll solution, should that come to pass.  
But the point is that ROLL cannot consider enhancements to anything, 
much less any new starts, until the survey document and the recharter is 
completed.  It seems that many communities have good ideas to bring to 
the table as that process starts, and we welcome that and look forward 
to that exciting technical work. 

Not passing the ROLL criteria is in no way a negative judgment on any of 
the protocols.  None of them were designed with this particular set of 
concerns first and foremost.  In fact, having more passes and fewer 
fails does not necessarily mean a particular protocol is better suited 
to be adapted to this regime - although there is likely to be some 
correlation.  It is conceivable that a single facet of a protocol design 
may be a huge show stopper, while redesign of another may solve several 
concerns.  The document is a matter of due digilence, not a beauty contest.

To have any one candidate protocol progressively tuning its design in 
response to an on-going assessment process and holding the completion of 
that assessment process hostage would be unfair to all the other 
candidates and communities.  They have good ideas to bring to the table 
too, but are patiently waiting for the process to move to the next step 
as was agreed upon in the initial workgroup formation and in every 
meeting since.

So I love that dymo -16 has all sorts of wonderful improvements and that 
members of MANET feel strongly that their ideas apply to ROLL - even 
where there is no mobility involved.  This is all wonderful and we look 
forward to working together.  So help us complete the survey and the 
recharter so that together, and with the broader set of interested 
parties, we can consider forward going technical work.  To date, our 
charter only permits us to survey a well defined universe of existing 
protocols and to provide a well-defined set of requirements documents 
and make a call as to whether there is work to be done.  You clearly 
agree that there is work to be done.  That is the ONLY bit that really 
matters.  If there is any technical inaccuracies relative to DYMO -15 
then by all means suggest a change to the text of the draft.  We would 
like that to be a useful a guide as possible.   But, the purpose of the 
draft is to make a single binary decision.  Is there an established 
protocol that exists today and satisfies all the requirements or not.  
If the answer is YES, we are done.  The WG shuts down.  If the answer is 
NO.  The working group recharters and we get to actual work.

Everything you have said reflects that the answer is NO.  Clearly you 
believe that additional work on dymo may be a possible solution.  Wonderful

Rough consensus to that is unequivocal.  So let's stop equivocating and 
get to work  - together.



Ian Chakeres wrote:
> How about another option - update the document based on the current
> specification?
>
> I believe that the recent changes have been relatively minor. They
> mainly explain and indicate to an implementer where added flexibility
> exists. I even brought several of these items to your attention during
> a face-to-face discussion in Dublin about the protocol-survey.
>
> Ian Chakeres
>
> On Fri, Jan 30, 2009 at 11:01 AM, Philip Levis <pal@cs.stanford.edu> wrote:
>   
>> On Jan 30, 2009, at 6:26 AM, Ian Chakeres wrote:
>>
>>     
>>> I respectfuly disagree.
>>>
>>> I think it a mistake to attempt to publish this document when it
>>> contains information that is clearly inaccurate.
>>>
>>> Sincerely,
>>> Ian Chakeres
>>>
>>> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
>>> <culler@eecs.berkeley.edu> wrote:
>>>       
>>>> Ian,
>>>>  It is really not reasonable to expect the authors to rev the document to
>>>> track a moving target.  That was precisely the reason that we had a clear
>>>> cut off.  Folks, including yourself, complained that it was too
>>>> restrictive
>>>> and we broadened it to include protocols that were still in draft.  In
>>>> addition, this concern of the survey never ending because there is always
>>>> something new that might be considered, especially those that are reved
>>>> in
>>>> response to the survey analysis, is also why it is important that we
>>>> accept
>>>> the draft and complete the recharter so that the working group, including
>>>> folks like yourself, can start the process of reving protocols or
>>>> considering new ones.  I have asked the authors not to consider requests
>>>> to
>>>> look at new drafts.
>>>>         
>> We have two options:
>>
>> 1) consider DYMO as of its stable state (-15), or
>> 2) remove DYMO from the document because it is not stable.
>>
>> The reason behind 2) is that the specification has not been implemented,
>> tested, nor does it have any running code that indicates the specification
>> is sound. Imagine delaying ROLL for a year because a protocol looks
>> promising but turns out to not work. *That* would make the document
>> inaccurate in a meaningful way.
>>
>> I'd much rather give DYMO the credit and relevance it is due and go with 1).
>>
>> Phil
>>
>>     
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Date: Fri, 30 Jan 2009 13:14:44 -0500
Message-ID: <374005f30901301014je781e96xf5852748ed954a5c@mail.gmail.com>
From: Ian Chakeres <ian.chakeres@gmail.com>
To: "David E. Culler" <culler@eecs.berkeley.edu>
Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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I believe the changes made to DYMO were relatively minor and largely
explanatory. The revised text mainly calls attention to DYMO's ability
to handle several of the criteria from the protocol-survey explicitly.

I feel that previous versions and the current version of the
protocol-survey do contain some misunderstandings about the
capabilities of DYMO and other protocols. Note that, many of these
errors have been resolved.

Please feel free to examine the documents and provide your opinion on
whether the changes being discussed were major or minor.

IMHO I think the easiest/fastest/fairest way to complete this document
is to get it up-to-date, as I do not think there is any disagreement
that the document is inaccurate/incorrect in its current state.

Ian Chakeres

On Fri, Jan 30, 2009 at 12:47 PM, David E. Culler
<culler@eecs.berkeley.edu> wrote:
> Absolutely agree that it should be as accurate as possible.  If the changes
> were minor then it should not matter much if the snapshot were dymo -15 or
> dymo -16.  But my understanding is that these changes are not minor.  They
> reflect significant protocol enhancements in part to address the
> observations that arose as part of doing the survey.  This is wonderful
> progress.  We'd love to have a better dymo and we'd love to have a better
> dymo provide a roll solution, should that come to pass.  But the point is
> that ROLL cannot consider enhancements to anything, much less any new
> starts, until the survey document and the recharter is completed.  It seems
> that many communities have good ideas to bring to the table as that process
> starts, and we welcome that and look forward to that exciting technical
> work.
> Not passing the ROLL criteria is in no way a negative judgment on any of the
> protocols.  None of them were designed with this particular set of concerns
> first and foremost.  In fact, having more passes and fewer fails does not
> necessarily mean a particular protocol is better suited to be adapted to
> this regime - although there is likely to be some correlation.  It is
> conceivable that a single facet of a protocol design may be a huge show
> stopper, while redesign of another may solve several concerns.  The document
> is a matter of due digilence, not a beauty contest.
>
> To have any one candidate protocol progressively tuning its design in
> response to an on-going assessment process and holding the completion of
> that assessment process hostage would be unfair to all the other candidates
> and communities.  They have good ideas to bring to the table too, but are
> patiently waiting for the process to move to the next step as was agreed
> upon in the initial workgroup formation and in every meeting since.
>
> So I love that dymo -16 has all sorts of wonderful improvements and that
> members of MANET feel strongly that their ideas apply to ROLL - even where
> there is no mobility involved.  This is all wonderful and we look forward to
> working together.  So help us complete the survey and the recharter so that
> together, and with the broader set of interested parties, we can consider
> forward going technical work.  To date, our charter only permits us to
> survey a well defined universe of existing protocols and to provide a
> well-defined set of requirements documents and make a call as to whether
> there is work to be done.  You clearly agree that there is work to be done.
>  That is the ONLY bit that really matters.  If there is any technical
> inaccuracies relative to DYMO -15 then by all means suggest a change to the
> text of the draft.  We would like that to be a useful a guide as possible.
> But, the purpose of the draft is to make a single binary decision.  Is there
> an established protocol that exists today and satisfies all the requirements
> or not.  If the answer is YES, we are done.  The WG shuts down.  If the
> answer is NO.  The working group recharters and we get to actual work.
>
> Everything you have said reflects that the answer is NO.  Clearly you
> believe that additional work on dymo may be a possible solution.  Wonderful
>
> Rough consensus to that is unequivocal.  So let's stop equivocating and get
> to work  - together.
>
>
>
> Ian Chakeres wrote:
>>
>> How about another option - update the document based on the current
>> specification?
>>
>> I believe that the recent changes have been relatively minor. They
>> mainly explain and indicate to an implementer where added flexibility
>> exists. I even brought several of these items to your attention during
>> a face-to-face discussion in Dublin about the protocol-survey.
>>
>> Ian Chakeres
>>
>> On Fri, Jan 30, 2009 at 11:01 AM, Philip Levis <pal@cs.stanford.edu>
>> wrote:
>>
>>>
>>> On Jan 30, 2009, at 6:26 AM, Ian Chakeres wrote:
>>>
>>>
>>>>
>>>> I respectfuly disagree.
>>>>
>>>> I think it a mistake to attempt to publish this document when it
>>>> contains information that is clearly inaccurate.
>>>>
>>>> Sincerely,
>>>> Ian Chakeres
>>>>
>>>> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
>>>> <culler@eecs.berkeley.edu> wrote:
>>>>
>>>>>
>>>>> Ian,
>>>>>  It is really not reasonable to expect the authors to rev the document
>>>>> to
>>>>> track a moving target.  That was precisely the reason that we had a
>>>>> clear
>>>>> cut off.  Folks, including yourself, complained that it was too
>>>>> restrictive
>>>>> and we broadened it to include protocols that were still in draft.  In
>>>>> addition, this concern of the survey never ending because there is
>>>>> always
>>>>> something new that might be considered, especially those that are reved
>>>>> in
>>>>> response to the survey analysis, is also why it is important that we
>>>>> accept
>>>>> the draft and complete the recharter so that the working group,
>>>>> including
>>>>> folks like yourself, can start the process of reving protocols or
>>>>> considering new ones.  I have asked the authors not to consider
>>>>> requests
>>>>> to
>>>>> look at new drafts.
>>>>>
>>>
>>> We have two options:
>>>
>>> 1) consider DYMO as of its stable state (-15), or
>>> 2) remove DYMO from the document because it is not stable.
>>>
>>> The reason behind 2) is that the specification has not been implemented,
>>> tested, nor does it have any running code that indicates the
>>> specification
>>> is sound. Imagine delaying ROLL for a year because a protocol looks
>>> promising but turns out to not work. *That* would make the document
>>> inaccurate in a meaningful way.
>>>
>>> I'd much rather give DYMO the credit and relevance it is due and go with
>>> 1).
>>>
>>> Phil
>>>
>>>
>
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Date: Fri, 30 Jan 2009 10:41:16 -0800
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Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>
Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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Thomas Heide Clausen wrote:
> I would like to second Ian on this front.
Of course.  We already know that you are interested in working on 
protocols for ROLL - once we recharter.  But, we cannot do any work on 
any protocols until the survey document is complete.  The issue is not 
whether there is a little tweaking and beautifying here or there.  The 
issue is YES or NO.  Is there an existing IETF routing protocol that 
satisfies the requirement.

You have clearly indicated that you believe that there is work that must 
be done to achieve a ROLL solution.  Perhaps that work may even be done 
relative to dymo.  That is wonderful, but irrelevant at this time.  Only 
once we all come together and say "we have done the survey and the 
answer is NO" can we even begin to think about solutions.  This is why I 
am asking you and Ian to allow us to finally make that step and move 
forward.  We should not hold the due-diligence process hostage.  There 
is a huge industry out there waiting for an IETF standard to emerge for 
links such as IEEE 802.15.4.  There are already multiple industrial 
forums producing incompatible standards, including HART, SP100, and 
Zigbee, even for this one specific link.  There are innumerable 
proprietary solutions and open, incompatible solutions for this same 
link.  There is an active effort to move the link forward with IEEE 
802.15.4e.  There are low power enhancements to 802.11.  All this is 
moving forward into an incompatible morass while we debate niceties 
about where we must include rev -15 or rev -16 or rev -17 of one of the 
many candidate solutions.  That is not the point.  The point is to get 
on with doing the real work to solve this real problem.  And by the way, 
there are many many other candidates that have been out there delivering 
in this space for years - but they are not holding the process back.  
Each day we continue this deliberation is another day we fall farther 
behind and the world moves on without an open standard solution in this 
space.

So, I respectfully request that you limit your concerns at this time to 
whether there are any major errors in the analysis of dymo -15 and 
please provide specific suggestions for wording changes.  Once we 
recharter, we can happily consider -16 or any other rev as a potential 
solution. 
>
> I believe that, for one thing, the DYMO distance metric is something 
> which goes way back -- at least, I remember having discussed it with 
> respect to "node cost" in OLSR and how it maps into DYMO.AODV a long 
> while back, only to realize what Ian also points out in this email: 
> the distance metric can be set to consider both "link cost" and "node 
> cost". As such, and on that front, I do not thing that this is a 
> "moving target" but rather is something that should be corrected.
>
> As for the rest of Ian's comments, I agree with those.
>
> I also respectfully suggest that we not publish a document containing 
> inaccurate information -- especially when such is pointed out on the 
> list.
>
> Note, I have reviewing the -05 version of this I-D high on my todo 
> list, but other IETF matters have kept me busy these past days. I'll 
> try to get through it over the weekend, and will post my comments here 
> (despite those in the past having been explicitly qualified as 
> "disruptive").
>
> Sincerely,
>
> Thomas
>
> On Jan 30, 2009, at 15:26 PM, Ian Chakeres wrote:
>
>> I respectfuly disagree.
>>
>> I think it a mistake to attempt to publish this document when it
>> contains information that is clearly inaccurate.
>>
>> Sincerely,
>> Ian Chakeres
>>
>> On Thu, Jan 29, 2009 at 11:26 PM, David E. Culler
>> <culler@eecs.berkeley.edu> wrote:
>>> Ian,
>>>   It is really not reasonable to expect the authors to rev the 
>>> document to
>>> track a moving target.  That was precisely the reason that we had a 
>>> clear
>>> cut off.  Folks, including yourself, complained that it was too 
>>> restrictive
>>> and we broadened it to include protocols that were still in draft.  In
>>> addition, this concern of the survey never ending because there is 
>>> always
>>> something new that might be considered, especially those that are 
>>> reved in
>>> response to the survey analysis, is also why it is important that we 
>>> accept
>>> the draft and complete the recharter so that the working group, 
>>> including
>>> folks like yourself, can start the process of reving protocols or
>>> considering new ones.  I have asked the authors not to consider 
>>> requests to
>>> look at new drafts.
>>>
>>> David
>>>
>>> Ian Chakeres wrote:
>>>
>>> Philip, I am glad to see another revision of the protocol-survey - but
>>> I am disappointed to see that many of my comments were ignored and
>>> several errors remain.
>>>
>>> I've included the contents of my earlier email about the errors below.
>>>
>>> Sincerely,
>>> Ian Chakeres
>>>
>>> ===START===
>>> I examined draft-ietf-roll-protocol-survey-03. I found most of my
>>> earlier comments addressed, but I believe there are still a few more
>>> items that need to be changed.
>>>
>>> DYMO's distance metric allows representation of link and node cost,
>>> along with other cost factors. Although "node" and "link" cost are not
>>> explicitly called out in the DYMO ID, the distance value associated
>>> with routing information can be modified before consideration for
>>> inclusion in the routing table as well as prior to sending routing
>>> information. The roll-protocol-survey document and summary table
>>> should be updated accordingly.
>>>
>>> DYMO-16 does not require, but does by default encourage
>>> sending/forwarding of RERR. Please modify Section 12 accordingly. I
>>> believe this change also effects the loss response rating for DYMO in
>>> the summary table.
>>>
>>> I think all '-low' should be removed from the protocol-survey.
>>>
>>> Finally, I did not see any change in Section 4.2, which I believe
>>> others also agreed was not clear.
>>>
>>> Here was my original comment
>>>
>>> """
>>> In Section 4.2, the motivation provided is the possibly large network
>>> size (250-millions) and deep network (20 hops). Network size and
>>> routing information size do not have a direct connection when
>>> hierarchical addressing is used. Perhaps this motivation could be
>>> removed and simply the last sentence kept. Given this change maybe the
>>> suitability metric should become routing table size, instead of table
>>> scalability.
>>> """
>>> ===END===
>>>
>>> On Mon, Jan 26, 2009 at 7:16 PM, Philip Levis <pal@cs.stanford.edu> 
>>> wrote:
>>>
>>>
>>> On Jan 26, 2009, at 4:00 PM, Internet-Drafts@ietf.org wrote:
>>>
>>>
>>>
>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>> directories.
>>> This draft is a work item of the Routing Over Low power and Lossy 
>>> networks
>>> Working Group of the IETF.
>>>
>>>        Title           : Overview of Existing Routing Protocols for Low
>>> Power and Lossy Networks
>>>        Author(s)       : A. Tavakoli, S. Dawson-Haggerty, P. Levis
>>>        Filename        : draft-ietf-roll-protocols-survey-05.txt
>>>        Pages           : 26
>>>        Date            : 2009-1-26
>>>
>>>
>>> Edits:
>>>
>>> Fixed all editorial nits (spelling, etc.) from Thomas and Ulrich.
>>>
>>> Fixed incorrect table values for OLSRv2. Triggered updates are 
>>> optional, so
>>> loss is a ?.
>>>
>>> Changed "Suitability Summary" to "Criteria"
>>>
>>> Fixed O(R + e) to O(R) + e.
>>>
>>> Removed redundant paragraph in 4.4 "The control cost criterion is a
>>> necessary but not..."
>>>
>>> Made IETF scope more specific ("any protocol" -> "any protocol 
>>> outside the
>>> IETF").
>>>
>>> Added errata to terminology section ("NOT RECOMMENDED").
>>>
>>> Cleaned up RFC/draft terminology in Section 4.
>>>
>>> Clarified "unbounded" control overhead.
>>>
>>> Explained 4kB of RAM.
>>>
>>> Phil
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>>
>>>
>>>
>>> _______________________________________________
>>> Roll mailing list
>>> Roll@ietf.org
>>> https://www.ietf.org/mailman/listinfo/roll
>>>
>> _______________________________________________
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>
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Subject: Re: [Roll] I-D ACTION:draft-ietf-roll-protocols-survey-05.txt
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On Jan 30, 2009, at 8:32 AM, Thomas Heide Clausen wrote:

> I would like to second Ian on this front.
>
> I believe that, for one thing, the DYMO distance metric is something  
> which goes way back -- at least, I remember having discussed it with  
> respect to "node cost" in OLSR and how it maps into DYMO.AODV a long  
> while back, only to realize what Ian also points out in this email:  
> the distance metric can be set to consider both "link cost" and  
> "node cost". As such, and on that front, I do not thing that this is  
> a "moving target" but rather is something that should be corrected.

Ah -- I was talking about loss response. That was an actual change in  
the specification, not just a clarification.

I think there's a misunderstanding here. Please note that "node cost"  
is actually more than a simple scalar value:

" However, in low power networks it is also desirable to account for
    the cost of forwarding through particular routers.  Applications
    require node or parameter constrained routing, which takes into
    account node properties and attributes such as power, memory, and
    battery life that dictate a router's willingness or ability to route
    other packets."

It was my understanding that "parameter constrained routing" as a term  
represents concerns that cannot be simply merged with a scalar notion  
of cost. That's why DYMO has a fail. The draft had node cost for DYMO  
as a "?" until it went from a personal draft to a WG draft. As DYMO  
does not specify the calculation of the distance metric (besides the  
hopcount inequality), clearly nodes can incorporate local costs into  
advertisements.

The the entry in the table changed from "?" to "fail" based on  
feedback made in Dublin at the WG meeting.

Does that make sense? Do you agree that DYMO's scalar cost cannot  
express predicates?

Phil
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From: Ian Chakeres <ian.chakeres@gmail.com>
To: Philip Levis <pal@cs.stanford.edu>
Cc: Ross Callon <rcallon@juniper.net>, ROLL WG <roll@ietf.org>, Thomas Heide Clausen <IETF@thomasclausen.org>, "David E. Culler" <culler@eecs.berkeley.edu>
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DYMO can take these properties/attributes into account using the
(dimension-less) distance metric.

I am guessing that we may have different opinions about how these
constraints can/should be conveyed to a routing protocol.

Ian

On Fri, Jan 30, 2009 at 12:27 PM, Philip Levis <pal@cs.stanford.edu> wrote:
<snip>
> " However, in low power networks it is also desirable to account for
>   the cost of forwarding through particular routers.  Applications
>   require node or parameter constrained routing, which takes into
>   account node properties and attributes such as power, memory, and
>   battery life that dictate a router's willingness or ability to route
>   other packets."
<snip>
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Hi Nicolas,

I got your phone mail as well, but too late to call.  I will try to call 
you on Monday morning, 

With regards to this email, I have deleted the sentence JP requests in the 
latest version.  I hope to get this new version out in the next few days.

Jerry







nicolas.riou@fr.schneider-electric.com 
01/30/2009 10:32 AM

To
Jerald.P.Martocci@jci.com
cc
roll@ietf.org
Subject
Re: [Roll] Comments on draft-ietf-roll-building-routing-reqs-02.txt







Hi Jerry, 

On Jan 23, 2009, at 10:29 PM, Jerald.P.Martocci@jci.com wrote:


>> 10) "Communication to these mostly sleeping devices MUST be 
>> bidirectional."
>> JP> Please be more specific. Do you mean by the routing protocol 
>> MUST be able to compute bi-directional route to sleeping devices ? 
>> Why ?
>> Yes and No.  You're actually asking two questions in your question...
>>
>>
>Yes we leave in a constrained environment ;-))
>> With regard to sleeping devices, the routing protocol must allow for 
>> delivering messages to an assigned (awake) proxy device who will 
>> later transmit the information to the sleeping device upon its 
>> awaking.  I've actually addressed this as a separate requirement.
>>
>>
>Indeed.
>> With regard to bidirectionality, I am simply saying that sensors 
>> must be able to receive application ACKs and other configuration 
>> data from its controller.  Some protocols (such as EnOcean) support 
>> only unidirectional messaging from the sensor to the controller. 
>> This might work for a lightweight application such as a wireless 
>> light switch turning on a light, but will not work for most of the 
>> commercial applications where the sensor must know that the packet 
>> has been successfully transmitted to the controller (say in a Fire 
>> application).
>>
>>
>Which does not necessarily mean a bi-directional route though. As you 
>know most of routing protocols are computing unidirectional routes 
>(fortunately!)
>
>> I've changed the text to read ...
>>
>> Communication to  sleeping devices MUST be bidirectional to allow 
>> for guaranteed packet delivery from the sensor to the controller.
>>
>Which is clearer but I still have an issue since this is a routing 
>requirement. I do not think that you require the routing protocol to 
>compute bi-directional routes. I understand that the communication 
>must be bi-directional thus this does not add any routing requirements 
>in addition to being able to compute routes from a node A to a node B 
>(and vice versa of course). Thus this sentence can be deleted, it is 
>already covered.
>>

NR=> Building systems must allow for BOTH battery-less sensors (e.g. a 
self-powered switch), supporting only unidirectional messaging, as well as 
regular sensors, supporting (and/or requiring) bi-directional messaging. 
Nevertheless, I think it is more a matter of implementation issue of the 
sleeping device's proxy than a specific routing requirement. As JP 
suggested, I think we can delete this sentence. 

Best Regards, 
Nicolas.

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<br><font size=2 face="sans-serif">Hi Nicolas,</font>
<br>
<br><font size=2 face="sans-serif">I got your phone mail as well, but too
late to call. &nbsp;I will try to call you on Monday morning, </font>
<br>
<br><font size=2 face="sans-serif">With regards to this email, I have deleted
the sentence JP requests in the latest version. &nbsp;I hope to get this
new version out in the next few days.</font>
<br>
<br><font size=2 face="sans-serif">Jerry</font>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>nicolas.riou@fr.schneider-electric.com</b>
</font>
<p><font size=1 face="sans-serif">01/30/2009 10:32 AM</font>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">Jerald.P.Martocci@jci.com</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">roll@ietf.org</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [Roll] Comments on draft-ietf-roll-building-routing-reqs-02.txt</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2><tt><br>
Hi Jerry,</tt></font><font size=3> <br>
</font><font size=2><tt><br>
On Jan 23, 2009, at 10:29 PM, Jerald.P.Martocci@jci.com wrote:<br>
</tt></font><font size=3><br>
</font><font size=2><tt><br>
&gt;&gt; 10) &quot;Communication to these mostly sleeping devices MUST
be &nbsp;<br>
&gt;&gt; bidirectional.&quot;<br>
&gt;&gt; JP&gt; Please be more specific. Do you mean by the routing protocol
&nbsp;<br>
&gt;&gt; MUST be able to compute bi-directional route to sleeping devices
? &nbsp;<br>
&gt;&gt; Why ?<br>
&gt;&gt; Yes and No. &nbsp;You're actually asking two questions in your
question...<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Yes we leave in a constrained environment ;-))<br>
&gt;&gt; With regard to sleeping devices, the routing protocol must allow
for &nbsp;<br>
&gt;&gt; delivering messages to an assigned (awake) proxy device who will
&nbsp;<br>
&gt;&gt; later transmit the information to the sleeping device upon its
&nbsp;<br>
&gt;&gt; awaking. &nbsp;I've actually addressed this as a separate requirement.<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Indeed.<br>
&gt;&gt; With regard to bidirectionality, I am simply saying that sensors
&nbsp;<br>
&gt;&gt; must be able to receive application ACKs and other configuration
&nbsp;<br>
&gt;&gt; data from its controller. &nbsp;Some protocols (such as EnOcean)
support &nbsp;<br>
&gt;&gt; only unidirectional messaging from the sensor to the controller.
&nbsp; <br>
&gt;&gt; This might work for a lightweight application such as a wireless
&nbsp;<br>
&gt;&gt; light switch turning on a light, but will not work for most of
the &nbsp;<br>
&gt;&gt; commercial applications where the sensor must know that the packet
&nbsp;<br>
&gt;&gt; has been successfully transmitted to the controller (say in a
Fire &nbsp;<br>
&gt;&gt; application).<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;Which does not necessarily mean a bi-directional route though. As you
&nbsp;<br>
&gt;know most of routing protocols are computing unidirectional routes
&nbsp;<br>
&gt;(fortunately!)<br>
&gt;<br>
&gt;&gt; I've changed the text to read ...<br>
&gt;&gt;<br>
&gt;&gt; Communication to &nbsp;sleeping devices MUST be bidirectional
to allow &nbsp;<br>
&gt;&gt; for guaranteed packet delivery from the sensor to the controller.<br>
&gt;&gt;<br>
&gt;Which is clearer but I still have an issue since this is a routing
&nbsp;<br>
&gt;requirement. I do not think that you require the routing protocol to
&nbsp;<br>
&gt;compute bi-directional routes. I understand that the communication
&nbsp;<br>
&gt;must be bi-directional thus this does not add any routing requirements
&nbsp;<br>
&gt;in addition to being able to compute routes from a node A to a node
B &nbsp;<br>
&gt;(and vice versa of course). Thus this sentence can be deleted, it is
&nbsp;<br>
&gt;already covered.<br>
&gt;&gt;</tt></font><font size=3><br>
</font><font size=2 face="sans-serif"><br>
NR=&gt; Building systems must allow for BOTH battery-less sensors (e.g.
a self-powered switch), supporting only unidirectional messaging, as well
as regular sensors, supporting (and/or requiring) bi-directional messaging.
Nevertheless, I think it is more a matter of implementation issue of the
sleeping device's proxy than a specific routing requirement. As JP suggested,
I think we can delete this sentence. </font><font size=3><br>
</font><font size=2 face="sans-serif"><br>
Best Regards,</font><font size=3> </font><font size=2 face="sans-serif"><br>
Nicolas.</font>
<br>
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