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From: Ralf Weber <ralf.weber@nominum.com>
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Cc: dhcwg@ietf.org, ietf@ietf.org, draft-ietf-dhc-relay-port.all@ietf.org
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Subject: [Int-dir] Intdir early review of draft-ietf-dhc-relay-port-05
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Reviewer: Ralf Weber
Review result: Ready with Nits

Moin!

I reviewed this document and I'm good with it. The only minor purely cosmetic
note is that it took me some time to understand why you record the port for the
IPv6 relay chain. According to a discussion I had with Bernie that is to be
able to have the agent stateless. Maybe add that to the motivation why you
store it in the packet at the end of section 4 (, to allow stateless operation
in a relay chain)

So long
-Ralf



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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: Ralf Weber <ralf.weber@nominum.com>
CC: "int-dir@ietf.org" <int-dir@ietf.org>, dhcwg <dhcwg@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dhc-relay-port.all@ietf.org" <draft-ietf-dhc-relay-port.all@ietf.org>, "Enke Chen (enkechen)" <enkechen@cisco.com>
Thread-Topic: Intdir early review of draft-ietf-dhc-relay-port-05
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: Ralf Weber <ralf.weber@nominum.com>
CC: "int-dir@ietf.org" <int-dir@ietf.org>, dhcwg <dhcwg@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dhc-relay-port.all@ietf.org" <draft-ietf-dhc-relay-port.all@ietf.org>, "Enke Chen (enkechen)" <enkechen@cisco.com>
Thread-Topic: Intdir early review of draft-ietf-dhc-relay-port-05
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Date: Sat, 22 Jul 2017 17:24:50 +0000
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Subject: Re: [Int-dir] Intdir early review of draft-ietf-dhc-relay-port-05
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Changed again of the paragraph in section 4 to below, thanks
to Ted who offerred the text:

   Relay agents do not maintain state.  To return a message to its
   source, the relay agent must include all the required information in
   the Relay-Forward message.  When a relay in a sequence of cascaded
   relays does not use the standard source port, that source port must
   be included along with the source address.  This option allows the
   relay agent to do so.

rfcdiff attached.

Cheers,
- Naiming


--_000_A5E26208902E41019542B5896342396Eciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
<div class=3D""><br class=3D"">
</div>
Changed again of the paragraph in section 4 to below, thanks
<div class=3D"">to Ted who offerred the text:</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p; &nbsp;Relay agents do not maintain state.&nbsp; To return a message to i=
ts</span></div>
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p;&nbsp; source, the relay agent must include all the required information =
in</span></div>
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p;&nbsp; the Relay-Forward message.&nbsp; When a relay in a sequence of cas=
caded</span></div>
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p;&nbsp; relays does not use the standard source port, that source port mus=
t</span></div>
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p;&nbsp; be included along with the source address.&nbsp; This option allow=
s the</span></div>
<div style=3D"margin: 0px; font-size: 14px; line-height: normal; font-famil=
y: Menlo; background-color: rgb(255, 255, 255);" class=3D"">
<span style=3D"font-variant-ligatures: no-common-ligatures" class=3D"">&nbs=
p;&nbsp; relay agent to do so.</span></div>
</div>
<div class=3D""><span style=3D"font-variant-ligatures: no-common-ligatures"=
 class=3D""><br class=3D"">
</span></div>
<div class=3D"">rfcdiff attached.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Cheers,</div>
<div class=3D"">- Naiming</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""></div>
</body>
</html>

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From nobody Mon Jul 24 18:13:27 2017
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From: Bernie Volz <volz@cisco.com>
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Reviewer: Bernie Volz
Review result: Ready with Nits

I am an assigned INT directorate early reviewer for
draft-ietf-lwig-energy-efficient-07. These comments were written primarily for
the benefit of the Internet Area Directors.

Document editors and shepherd(s) should treat these comments just like they
would treat comments from any other IETF contributors and resolve them along
with any other comments that have been received. For more details on the INT
Directorate, see http://www.ietf.org/iesg/directorate.html.

I found the document's information interesting, and it is document that is
benefical to the IETF community in understanding the impact energy savings
techniques (mostly related to radios for wireless communication) can have on
protocols (both at lower and higher layers). It is going for Informational
status, which I think is appropriate for this document.

All my comments are fairly minor nits.

In section 1, "Only few efforts focused on" should likely be "Only few efforts
have focused on"? (Add have)

In section 1.1, I think this section can be removed as there are no uses of the
RFC 2119 keywords.

In section 2, there are a few technologies listed here that might use
references; some do appear later but not all. It is usually a good question as
to where references are best added since this is overview material. Those
without any references are ITU-T G.9959 and MS/TP-BACnet.

Also in Figure 2, it is too bad that some power value for listening (when not
"actively" expecting a packet) isn't included since there is a claim that this
can use more energy than transmitting, but it would also be a uJ/<time> which
is unlike the others. Though perhaps indicating a "listening (for X ms)" entry
could work? Anyway, not a big issue.

In section 3, I presume everyone knows what MAC is
(draft-bormann-lwig-7228bis-01 does not define it). Also, might be good to
indicate what RDC is as it is just used (in the MAC and Radio Duty Cycling
section, so pretty obvious likely).

Also in section 3, "take great care of the problem" is a bit strange wording.
Perhaps "are at work on the problem"? Or something like that? And, "can work
perfectly with them" would certainly be great, it may be a stretch of goal -
"can work well with them" may be better?

In section 3.2, "contributes to the packet overall delay" should be
"contributes to the packet's overall delay" ('s).

In section 3.3, "in some services this kind of networks, such as over-the-air"
could be "for some services, such as over-the-air". I think for is better than
in and not sure "these kinds of networks" (instead of this kind of networks) is
really needed?

Also, in this section, "that can achieved when" should be "that can be achieved
when".

In section 3.5.1, "extended sleep modes, traffic filtering" should likely be
"extended sleep modes, and traffic filtering". (You may or may not prefer the
last comma in a list, but the "and" should be there).

And, in this section, in "upper layer protocols knows such capabilities
provided" likely should be "upper layer protocols know such capabilities are
provided".

And, in this section, I don't think you need to define (STA) in several places;
once (first time) should be sufficient?

And, in this section, "by not forwarding individually addressed frames
addresses to" perhaps this should drop "individually addressed"? But perhaps
I'm not understanding why it is needed?

And, "Upper layer protocols would better synchronize" perhaps could be "Upper
layer protocols would best synchronize"? Or just "Upper layer protocols should
synchronize"?

In section 3.5.3, perhaps insert spaces between the 6LoWPAN references to make
the formatting more flexible?

And, in this section, should TDMA be defined (again a fairly common term, but
not in draft-bormann-lwig-7228bis-01.

In section 3.5.4, I think you would want to use "connectionless" instead of
"connection less"?

And, in this section, "data transfer reliability significant" should be "data
transfer reliability significantly"?

In section 4, "So they are quite ignorant" it isn't exactly clear what "they"
are. Replace with "So higher level protocols are quite ignorant"?

And, "but both the sender and receiver should spend" should likely be "but both
the sender and receive will spend"?

In section 6.2, a reference for oneM2M (perhaps to www.onem2m.org) could be
added?

In section 9, the "Thank Ted Lemon, Joel Jaeggli, and efforts to initiate this
facilities" sounds more like notes than actual text? Perhaps something like
"Thanks to Ted Lemon and Joel Jaeglli for initiating and facilitating this
editing session."?

In section 12.1, for the EN300 reference, there are double quotes that probably
aren't needed (single would do)?

Finally, thanks for writing the document!

- Bernie Volz


