
From nobody Mon Jan  2 09:15:36 2017
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Subject: [dhcwg] I-D Action: draft-ietf-dhc-sedhcpv6-19.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 Dynamic Host Configuration of the IETF.

        Title           : Secure DHCPv6
        Authors         : Sheng Jiang
                          Lishan Li
                          Yong Cui
                          Tatuya Jinmei
                          Ted Lemon
                          Dacheng Zhang
	Filename        : draft-ietf-dhc-sedhcpv6-19.txt
	Pages           : 28
	Date            : 2017-01-02

Abstract:
   DHCPv6 includes no deployable security mechanism that can protect
   end-to-end communication between DHCP clients and servers.  This
   document describes a mechanism for using public key cryptography to
   provide such security.  The mechanism provides encryption in all
   cases, and can be used for authentication based on pre-sharing of
   authorized certificates.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dhc-sedhcpv6/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-dhc-sedhcpv6-19

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dhc-sedhcpv6-19


Please note that it may take a couple of minutes from the time of submission
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From nobody Thu Jan  5 06:33:04 2017
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Cc: dhc-chairs@ietf.org, dhcwg@ietf.org, volz@cisco.com, draft-ietf-dhc-dhcpv6-failover-protocol@ietf.org
Subject: [dhcwg] Last Call: <draft-ietf-dhc-dhcpv6-failover-protocol-03.txt> (DHCPv6 Failover Protocol) to Proposed Standard
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The IESG has received a request from the Dynamic Host Configuration WG
(dhc) to consider the following document:
- 'DHCPv6 Failover Protocol'
  <draft-ietf-dhc-dhcpv6-failover-protocol-03.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-01-19. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   DHCPv6 as defined in "Dynamic Host Configuration Protocol for IPv6
   (DHCPv6)" (RFC3315) does not offer server redundancy.  This document
   defines a protocol implementation to provide DHCPv6 failover, a
   mechanism for running two servers with the capability for either
   server to take over clients' leases in case of server failure or
   network partition.  It meets the requirements for DHCPv6 failover
   detailed in "DHCPv6 Failover Requirements" (RFC7031).




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-failover-protocol/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-failover-protocol/ballot/


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





From nobody Fri Jan  6 14:38:34 2017
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Subject: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.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 Dynamic Host Configuration of the IETF.

        Title           : Generalized Source UDP Port of DHCP Relay
        Authors         : Naiming Shen
                          Enke Chen
	Filename        : draft-ietf-dhc-relay-port-01.txt
	Pages           : 8
	Date            : 2017-01-06

Abstract:
   This document extends the DHCP and DHCPv6 protocols for the UDP
   transport from relay agent to server and allows the port to be any
   valid number on the DHCP relay system.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dhc-relay-port/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-dhc-relay-port-01

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From nobody Fri Jan  6 14:50:18 2017
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: dhcwg <dhcwg@ietf.org>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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From: yogendra pal <jntupal@gmail.com>
Date: Sat, 7 Jan 2017 21:10:46 +0530
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To: "Bernie Volz (volz)" <volz@cisco.com>, venkata S R G <venkatasubbarao.gorrepati@citrix.com>
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Subject: Re: [dhcwg] IETF-98 (Chicago) DHC WG Session Agenda Requests -
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Hi Bernie and Tomek,


We would like to present details of our existing draft into WG.

(https://tools.ietf.org/html/draft-ypal-sfc-dhcp-option-for-nsh-for-sfp-02)


Title Of Session: DHCP option for NSH in SFP

Presenter: Yogendra Pal and VenkataSubba Rao Gorrepati

Related Drafts: None

Time Required: 10 mins
Purpose of Session: Experimental thought behind NSH and DHCP option.

Thanks and Regards,
Yogendra  / Venkat


On Mon, Dec 19, 2016 at 11:34 PM, Bernie Volz (volz) <volz@cisco.com> wrote:

> Hi:
>
>
>
> Please submit agenda requests as soon as you can if you do plan to present
> at the DHC WG session in Chicago (requests must be submitted by January
> 31st; Tomek or I need to submit the session request by February 10th).
>
>
>
> As in the past, please provide:
>
>
>
> Title Of Session:
>
> Presenter:
>
> Related Drafts:
>
> Time Required:
>
> Purpose of Session:
>
>
>
> We do want to remind those requesting time that you should focus on
> discussing key issues that need resolution to move a draft forward.
>
>
>
> While we are still 3 months from that meeting, the session requests have
> opened up and we need to know approximately how much time to request. It is
> possible that if we have few (or no) requests for time, we will not need to
> meet.
>
>
>
> Thanks!
>
>
>
> -          Tomek & Bernie
>
>
>
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www.ietf.org/mailman/listinfo/dhcwg
>
>

--001a1144218a508f0b054582f548
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<div dir=3D"ltr"><div><div><p class=3D"MsoNormal">Hi Bernie and Tomek,</p><=
p class=3D"MsoNormal"><br></p><p class=3D"MsoNormal">We would like to prese=
nt details of our existing draft into WG. <br></p><p class=3D"MsoNormal">(<=
a href=3D"https://tools.ietf.org/html/draft-ypal-sfc-dhcp-option-for-nsh-fo=
r-sfp-02">https://tools.ietf.org/html/draft-ypal-sfc-dhcp-option-for-nsh-fo=
r-sfp-02</a>)</p><p class=3D"MsoNormal"><br></p><p class=3D"MsoNormal">Titl=
e Of Session: DHCP option for NSH in SFP<br></p>
<p class=3D"MsoNormal">Presenter: Yogendra Pal and VenkataSubba Rao Gorrepa=
ti<br></p>
<p class=3D"MsoNormal">Related Drafts: None<br></p>
<p class=3D"MsoNormal">Time Required: 10 mins<br></p>
Purpose of Session: Experimental thought behind NSH and DHCP option.<br><br=
></div>Thanks and Regards,<br></div>Yogendra=C2=A0 / Venkat <br><div><div><=
pre><span class=3D"gmail-h1"></span></pre></div><div class=3D"gmail_extra">=
<br><div class=3D"gmail_quote">On Mon, Dec 19, 2016 at 11:34 PM, Bernie Vol=
z (volz) <span dir=3D"ltr">&lt;<a href=3D"mailto:volz@cisco.com" target=3D"=
_blank">volz@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex">





<div link=3D"#0563C1" vlink=3D"#954F72" lang=3D"EN-US">
<div class=3D"m_-8628505817165152524WordSection1">
<p class=3D"MsoNormal">Hi:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Please submit agenda requests as soon as you can if =
you do plan to present at the DHC WG session in Chicago (requests must be s=
ubmitted by January 31st; Tomek or I need to submit the session request by =
February 10th).<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">As in the past, please provide:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Title Of Session:<u></u><u></u></p>
<p class=3D"MsoNormal">Presenter:<u></u><u></u></p>
<p class=3D"MsoNormal">Related Drafts:<u></u><u></u></p>
<p class=3D"MsoNormal">Time Required:<u></u><u></u></p>
<p class=3D"MsoNormal">Purpose of Session:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">We do want to remind those requesting time that you =
should focus on discussing key issues that need resolution to move a draft =
forward.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">While we are still 3 months from that meeting, the s=
ession requests have opened up and we need to know approximately how much t=
ime to request. It is possible that if we have few (or no) requests for tim=
e, we will not need to meet.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks!<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"m_-8628505817165152524MsoListParagraph"><u></u><span>-<span sty=
le=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u>Tomek &amp; Bernie<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>

<br>______________________________<wbr>_________________<br>
dhcwg mailing list<br>
<a href=3D"mailto:dhcwg@ietf.org">dhcwg@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dhcwg" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dhcwg</a><br>
<br></blockquote></div></div></div></div>

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Subject: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Hi,

Considering growing popularity of Internet of Things and relevant protocols=
 like LWM2M/CoAP/MQTT, we in Ericsson see need for new DHCP options to make=
 LWM2M service deployment easy and flexible.

Light weight machine to machine (LWM2M) protocol is used to manage end devi=
ce life cycle in machine to machine communication scenarios.
LWM2M device bootstrap is an optional life cycle phase for devices to  get =
needed information when starting up for first time.  Information
gathered during bootstrapping might include management server details  and =
security certificates required to establish connectivity with
management server.  Information required to connect with bootstrap  server =
might be hard coded during device manufacturing phase.

Hard coding configuration by device manufacturer forces device  operator to=
 use same configuration as hard coded.  It is possible
that reachability information of bootstrap server that is hard coded may be=
 outdated and boot strap server reachability might fail during
first use of device.  In such cases connectivity with bootstrap server is p=
ossible only through device software upgrade.

So, we see need to introduce two options to support LWM2M server URL and LW=
M2M server certificate that validates public key provided by LWM2M server. =
Thus bootstrap related information can be gathered by LWM2M client during D=
HCP/DHCPv6 negotiation phase. Draft available at below link describes detai=
ls.

https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstr=
ap-options-01.txt

This draft considers options for both DHCP and DHCPv6.

I would like this draft to be considered by DHC working group as work item.=
 Please contact me for any further details.


With Regards
Srinivasa Rao Nalluri
Ericssion
India

--_000_HE1PR0701MB191453938CCDD842F97014F3DE640HE1PR0701MB1914_
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<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Considering growing popularity of Internet of Things=
 and relevant protocols like LWM2M/CoAP/MQTT, we in Ericsson see need for n=
ew DHCP options to make LWM2M service deployment easy and flexible.<o:p></o=
:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:black">Light weight machine to =
machine (LWM2M) protocol is used to manage end device life cycle in machine=
 to machine communication scenarios.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">LWM2M device bootstrap i=
s an optional life cycle phase for devices to&nbsp; get needed information =
when starting up for first time.&nbsp; Information<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">gathered during bootstra=
pping might include management server details&nbsp; and security certificat=
es required to establish connectivity with<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">management server.&nbsp;=
 Information required to connect with bootstrap&nbsp; server might be hard =
coded during device manufacturing phase.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">Hard coding configuratio=
n by device manufacturer forces device&nbsp; operator to use same configura=
tion as hard coded.&nbsp; It is possible<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">that reachability inform=
ation of bootstrap server that is hard coded may be outdated and boot strap=
 server reachability might fail during<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">first use of device.&nbs=
p; In such cases connectivity with bootstrap server is possible only throug=
h device software upgrade.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">So, we see need to introduce two options to support =
LWM2M server URL and LWM2M server certificate that validates public key pro=
vided by LWM2M server. Thus bootstrap related information can be gathered b=
y LWM2M client during DHCP/DHCPv6
 negotiation phase. Draft available at below link describes details. <o:p><=
/o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/internet-drafts/draf=
t-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-01.txt">https://www.ietf.org/i=
nternet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-01.txt</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal">This draft considers options for both DHCP and DHCPv=
6.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like this draft to be considered by DHC work=
ing group as work item. Please contact me for any further details.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">With Regards<o:p></o:p></p>
<p class=3D"MsoNormal">Srinivasa Rao Nalluri<o:p></o:p></p>
<p class=3D"MsoNormal">Ericssion <o:p></o:p></p>
<p class=3D"MsoNormal">India<o:p></o:p></p>
</div>
</body>
</html>

--_000_HE1PR0701MB191453938CCDD842F97014F3DE640HE1PR0701MB1914_--


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From: Ted Lemon <mellon@fugue.com>
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Date: Mon, 9 Jan 2017 09:21:02 -0500
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To: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>
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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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How would this be validated?

> On Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri =
<srinivasa.rao.nalluri@ericsson.com> wrote:
>=20
> Hi,
> =20
> Considering growing popularity of Internet of Things and relevant =
protocols like LWM2M/CoAP/MQTT, we in Ericsson see need for new DHCP =
options to make LWM2M service deployment easy and flexible.
> =20
> Light weight machine to machine (LWM2M) protocol is used to manage end =
device life cycle in machine to machine communication scenarios.
> LWM2M device bootstrap is an optional life cycle phase for devices to  =
get needed information when starting up for first time.  Information
> gathered during bootstrapping might include management server details  =
and security certificates required to establish connectivity with
> management server.  Information required to connect with bootstrap  =
server might be hard coded during device manufacturing phase.
> =20
> Hard coding configuration by device manufacturer forces device  =
operator to use same configuration as hard coded.  It is possible
> that reachability information of bootstrap server that is hard coded =
may be outdated and boot strap server reachability might fail during
> first use of device.  In such cases connectivity with bootstrap server =
is possible only through device software upgrade.
> =20
> So, we see need to introduce two options to support LWM2M server URL =
and LWM2M server certificate that validates public key provided by LWM2M =
server. Thus bootstrap related information can be gathered by LWM2M =
client during DHCP/DHCPv6 negotiation phase. Draft available at below =
link describes details.=20
> =20
> =
https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootst=
rap-options-01.txt =
<https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-boots=
trap-options-01.txt>
> =20
> This draft considers options for both DHCP and DHCPv6.
> =20
> I would like this draft to be considered by DHC working group as work =
item. Please contact me for any further details.
> =20
> =20
> With Regards
> Srinivasa Rao Nalluri
> Ericssion=20
> India
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org <mailto:dhcwg@ietf.org>
> https://www.ietf.org/mailman/listinfo/dhcwg =
<https://www.ietf.org/mailman/listinfo/dhcwg>

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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-line-break: after-white-space;" =
class=3D"">How would this be validated?<div class=3D""><br class=3D""><div=
 class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri &lt;<a =
href=3D"mailto:srinivasa.rao.nalluri@ericsson.com" =
class=3D"">srinivasa.rao.nalluri@ericsson.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Hi,<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">Considering=
 growing popularity of Internet of Things and relevant protocols like =
LWM2M/CoAP/MQTT, we in Ericsson see need for new DHCP options to make =
LWM2M service deployment easy and flexible.<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"" class=3D"">Light weight machine to machine (LWM2M) protocol =
is used to manage end device life cycle in machine to machine =
communication scenarios.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"" class=3D"">LWM2M =
device bootstrap is an optional life cycle phase for devices to&nbsp; =
get needed information when starting up for first time.&nbsp; =
Information<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"" class=3D"">gathered during bootstrapping =
might include management server details&nbsp; and security certificates =
required to establish connectivity with<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"" class=3D"">management server.&nbsp; Information required to =
connect with bootstrap&nbsp; server might be hard coded during device =
manufacturing phase.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"" class=3D"">Hard coding configuration by =
device manufacturer forces device&nbsp; operator to use same =
configuration as hard coded.&nbsp; It is possible<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"" class=3D"">that reachability information of bootstrap server =
that is hard coded may be outdated and boot strap server reachability =
might fail during<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"" class=3D"">first use of device.&nbsp; In =
such cases connectivity with bootstrap server is possible only through =
device software upgrade.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">So, we see need to introduce two =
options to support LWM2M server URL and LWM2M server certificate that =
validates public key provided by LWM2M server. Thus bootstrap related =
information can be gathered by LWM2M client during DHCP/DHCPv6 =
negotiation phase. Draft available at below link describes details.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><a =
href=3D"https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2=
m-bootstrap-options-01.txt" style=3D"color: purple; text-decoration: =
underline;" =
class=3D"">https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-l=
wm2m-bootstrap-options-01.txt</a><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">This draft considers options for both =
DHCP and DHCPv6.<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">I would like this draft to be considered by DHC working group =
as work item. Please contact me for any further details.<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">With =
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From: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>
To: Ted Lemon <mellon@fugue.com>
Thread-Topic: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Hello Ted Lemon,

If I understand correct, you are asking how certificate supplied through DH=
CP option is validated.

The certificate supplied through DHCP option is not validated but it can be=
 used to validate certificate offered by LWM2M server during LWM2M bootstra=
pping phase.

Instead of hardcoding root certificate in device by manufacturer, we are pr=
oposing to obtain same through DHCP option.

In case I misunderstood your question, please elaborate same.

With Regards
Srinivas

From: Ted Lemon [mailto:mellon@fugue.com]
Sent: Monday, January 09, 2017 7:51 PM
To: Srinivasa Rao Nalluri
Cc: dhcwg@ietf.org; Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit Gupta X
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services

How would this be validated?

On Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri <srinivasa.rao.nalluri@er=
icsson.com<mailto:srinivasa.rao.nalluri@ericsson.com>> wrote:

Hi,

Considering growing popularity of Internet of Things and relevant protocols=
 like LWM2M/CoAP/MQTT, we in Ericsson see need for new DHCP options to make=
 LWM2M service deployment easy and flexible.

Light weight machine to machine (LWM2M) protocol is used to manage end devi=
ce life cycle in machine to machine communication scenarios.
LWM2M device bootstrap is an optional life cycle phase for devices to  get =
needed information when starting up for first time.  Information
gathered during bootstrapping might include management server details  and =
security certificates required to establish connectivity with
management server.  Information required to connect with bootstrap  server =
might be hard coded during device manufacturing phase.

Hard coding configuration by device manufacturer forces device  operator to=
 use same configuration as hard coded.  It is possible
that reachability information of bootstrap server that is hard coded may be=
 outdated and boot strap server reachability might fail during
first use of device.  In such cases connectivity with bootstrap server is p=
ossible only through device software upgrade.

So, we see need to introduce two options to support LWM2M server URL and LW=
M2M server certificate that validates public key provided by LWM2M server. =
Thus bootstrap related information can be gathered by LWM2M client during D=
HCP/DHCPv6 negotiation phase. Draft available at below link describes detai=
ls.

https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstr=
ap-options-01.txt

This draft considers options for both DHCP and DHCPv6.

I would like this draft to be considered by DHC working group as work item.=
 Please contact me for any further details.


With Regards
Srinivasa Rao Nalluri
Ericssion
India
_______________________________________________
dhcwg mailing list
dhcwg@ietf.org<mailto:dhcwg@ietf.org>
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hello Ted Lemon,<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">If I understand correct, =
you are asking how certificate supplied through DHCP option is validated.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The certificate supplied =
through DHCP option is not validated but it can be used to validate certifi=
cate offered by LWM2M server during LWM2M bootstrapping
 phase. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Instead of hardcoding roo=
t certificate in device by manufacturer, we are proposing to obtain same th=
rough DHCP option.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">In case I misunderstood y=
our question, please elaborate same.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">With Regards<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Srinivas<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Ted Lemo=
n [mailto:mellon@fugue.com]
<br>
<b>Sent:</b> Monday, January 09, 2017 7:51 PM<br>
<b>To:</b> Srinivasa Rao Nalluri<br>
<b>Cc:</b> dhcwg@ietf.org; Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit =
Gupta X<br>
<b>Subject:</b> Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">How would this be validated?<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri &l=
t;<a href=3D"mailto:srinivasa.rao.nalluri@ericsson.com">srinivasa.rao.nallu=
ri@ericsson.com</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Hi,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Considering growing popularity of Inter=
net of Things and relevant protocols like LWM2M/CoAP/MQTT, we in Ericsson s=
ee need for new DHCP options to make LWM2M service deployment
 easy and flexible.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Light weight machine to machine (LWM2M)=
 protocol is used to manage end device life cycle in machine to machine com=
munication scenarios.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">LWM2M device bootstrap is an optional l=
ife cycle phase for devices to&nbsp; get needed information when starting u=
p for first time.&nbsp; Information<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">gathered during bootstrapping might inc=
lude management server details&nbsp; and security certificates required to =
establish connectivity with<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">management server.&nbsp; Information re=
quired to connect with bootstrap&nbsp; server might be hard coded during de=
vice manufacturing phase.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Hard coding configuration by device man=
ufacturer forces device&nbsp; operator to use same configuration as hard co=
ded.&nbsp; It is possible<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">that reachability information of bootst=
rap server that is hard coded may be outdated and boot strap server reachab=
ility might fail during<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">first use of device.&nbsp; In such case=
s connectivity with bootstrap server is possible only through device softwa=
re upgrade.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">So, we see need to introduce two option=
s to support LWM2M server URL and LWM2M server certificate that validates p=
ublic key provided by LWM2M server. Thus bootstrap related
 information can be gathered by LWM2M client during DHCP/DHCPv6 negotiation=
 phase. Draft available at below link describes details.<span class=3D"appl=
e-converted-space">&nbsp;</span><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><a href=3D"https://www.ietf.org/interne=
t-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-01.txt"><span sty=
le=3D"color:purple">https://www.ietf.org/internet-drafts/draft-nalluri-dhc-=
dhcpv6-lwm2m-bootstrap-options-01.txt</span></a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">This draft considers options for both D=
HCP and DHCPv6.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">I would like this draft to be considere=
d by DHC working group as work item. Please contact me for any further deta=
ils.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">With Regards<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Srinivasa Rao Nalluri<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Ericssion<span class=3D"apple-converted=
-space">&nbsp;</span><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">India<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;He=
lvetica&quot;,&quot;sans-serif&quot;">_____________________________________=
__________<br>
dhcwg mailing list<br>
</span><a href=3D"mailto:dhcwg@ietf.org"><span style=3D"font-size:10.5pt;fo=
nt-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;color:purple">dhcwg@=
ietf.org</span></a><span style=3D"font-size:10.5pt;font-family:&quot;Helvet=
ica&quot;,&quot;sans-serif&quot;"><br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/dhcwg"><span style=
=3D"font-size:10.5pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quo=
t;;color:purple">https://www.ietf.org/mailman/listinfo/dhcwg</span></a><o:p=
></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</body>
</html>

--_000_HE1PR0701MB1914138E2293BA8C976DC9C2DE670HE1PR0701MB1914_--


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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com> wrote:

> If I understand correct, you are asking how certificate supplied =
through DHCP option is validated.
> =20
> The certificate supplied through DHCP option is not validated but it =
can be used to validate certificate offered by LWM2M server during LWM2M =
bootstrapping phase.
> =20
> Instead of hardcoding root certificate in device by manufacturer, we =
are proposing to obtain same through DHCP option.

I can see the use case, but now you validating the information being =
provided ... using a certificate provided by an untrusted source.
Thus, if someone has enough access to redirect your devices to use their =
server, they probably have enough access to provide the fake certificate =
to make their server trusted. I'm assuming this is what Ted was alluring =
to.


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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Simon Hobson <dhcp1@thehobsons.co.uk>, "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Maybe if seDHCPv6 is used, this could resolve some issues ... though of cou=
rse, there is still the question of how to trust the seDHCPv6 certificate!

- Bernie

-----Original Message-----
From: dhcwg [mailto:dhcwg-bounces@ietf.org] On Behalf Of Simon Hobson
Sent: Tuesday, January 10, 2017 3:07 AM
To: dhcwg@ietf.org
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services

Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com> wrote:

> If I understand correct, you are asking how certificate supplied through =
DHCP option is validated.
> =20
> The certificate supplied through DHCP option is not validated but it can =
be used to validate certificate offered by LWM2M server during LWM2M bootst=
rapping phase.
> =20
> Instead of hardcoding root certificate in device by manufacturer, we are =
proposing to obtain same through DHCP option.

I can see the use case, but now you validating the information being provid=
ed ... using a certificate provided by an untrusted source.
Thus, if someone has enough access to redirect your devices to use their se=
rver, they probably have enough access to provide the fake certificate to m=
ake their server trusted. I'm assuming this is what Ted was alluring to.

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


From nobody Tue Jan 10 08:26:59 2017
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: [dhcwg] IETF-98 (Chicago) DHC WG Session Agenda Requests - by January 31, 2017!
Thread-Index: AdJrXlpdRJM1dajJQqW3urLi5jIqyQ==
Date: Tue, 10 Jan 2017 16:26:54 +0000
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Subject: Re: [dhcwg] IETF-98 (Chicago) DHC WG Session Agenda Requests - by January 31, 2017!
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Hi:

I've created https://github.com/dhcwg/wg/wiki/IETF-98-(Chicago)-DHC-WG-Agen=
da to track the agenda requests.

Reminder - we need to have requests in by January 31, 2017 to determine whe=
ther to request time and how much time to request.


-          Bernie

From: dhcwg [mailto:dhcwg-bounces@ietf.org] On Behalf Of Bernie Volz (volz)
Sent: Monday, December 19, 2016 1:05 PM
To: dhcwg@ietf.org
Subject: [dhcwg] IETF-98 (Chicago) DHC WG Session Agenda Requests -

Hi:

Please submit agenda requests as soon as you can if you do plan to present =
at the DHC WG session in Chicago (requests must be submitted by January 31s=
t; Tomek or I need to submit the session request by February 10th).

As in the past, please provide:

Title Of Session:
Presenter:
Related Drafts:
Time Required:
Purpose of Session:

We do want to remind those requesting time that you should focus on discuss=
ing key issues that need resolution to move a draft forward.

While we are still 3 months from that meeting, the session requests have op=
ened up and we need to know approximately how much time to request. It is p=
ossible that if we have few (or no) requests for time, we will not need to =
meet.

Thanks!


-          Tomek & Bernie


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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I&#8217;ve created <a =
href=3D"https://github.com/dhcwg/wg/wiki/IETF-98-(Chicago)-DHC-WG-Agenda">
https://github.com/dhcwg/wg/wiki/IETF-98-(Chicago)-DHC-WG-Agenda</a> to tra=
ck the agenda requests.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Reminder &#8211; we ne=
ed to have requests in by January 31, 2017 to determine whether to request =
time and how much time to request.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Bernie<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> dhcwg [mailto:dhcwg-bounces@ietf.org] <=
b>On Behalf Of
</b>Bernie Volz (volz)<br>
<b>Sent:</b> Monday, December 19, 2016 1:05 PM<br>
<b>To:</b> dhcwg@ietf.org<br>
<b>Subject:</b> [dhcwg] IETF-98 (Chicago) DHC WG Session Agenda Requests -<=
o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please submit agenda requests as soon as you can if =
you do plan to present at the DHC WG session in Chicago (requests must be s=
ubmitted by January 31st; Tomek or I need to submit the session request by =
February 10th).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As in the past, please provide:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Title Of Session:<o:p></o:p></p>
<p class=3D"MsoNormal">Presenter:<o:p></o:p></p>
<p class=3D"MsoNormal">Related Drafts:<o:p></o:p></p>
<p class=3D"MsoNormal">Time Required:<o:p></o:p></p>
<p class=3D"MsoNormal">Purpose of Session:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We do want to remind those requesting time that you =
should focus on discussing key issues that need resolution to move a draft =
forward.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">While we are still 3 months from that meeting, the s=
ession requests have opened up and we need to know approximately how much t=
ime to request. It is possible that if we have few (or no) requests for tim=
e, we will not need to meet.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Tomek &amp; Bernie<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
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To: Simon Hobson <dhcp1@thehobsons.co.uk>
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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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On Jan 10, 2017, at 3:06 AM, Simon Hobson <dhcp1@thehobsons.co.uk> =
wrote:
> I can see the use case, but now you validating the information being =
provided ... using a certificate provided by an untrusted source.
> Thus, if someone has enough access to redirect your devices to use =
their server, they probably have enough access to provide the fake =
certificate to make their server trusted. I'm assuming this is what Ted =
was alluring to.

Yes, this is exactly what I was alluring to.   :)


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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-line-break: after-white-space;" =
class=3D"">On Jan 10, 2017, at 3:06 AM, Simon Hobson &lt;<a =
href=3D"mailto:dhcp1@thehobsons.co.uk" =
class=3D"">dhcp1@thehobsons.co.uk</a>&gt; wrote:<div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Menlo-Regular; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">I can see the use =
case, but now you validating the information being provided ... using a =
certificate provided by an untrusted source.</span><br =
style=3D"font-family: Menlo-Regular; font-size: 14px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Menlo-Regular; font-size: 14px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Thus, if someone has enough access to redirect =
your devices to use their server, they probably have enough access to =
provide the fake certificate to make their server trusted. I'm assuming =
this is what Ted was alluring to.</span></div></blockquote></div><br =
class=3D""><div class=3D"">Yes, this is exactly what I was alluring to. =
&nbsp; :)</div><div class=3D""><br class=3D""></div></body></html>=

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From nobody Wed Jan 11 12:27:02 2017
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From: kkinnear <kkinnear@cisco.com>
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To: Carlos Bernardos <cjbc@it.uc3m.es>
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Cc: dhcwg@ietf.org, int-dir@ietf.org, ietf@ietf.org, draft-ietf-dhc-dhcpv6-failover-protocol.all@ietf.org, Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Review of draft-ietf-dhc-dhcpv6-failover-protocol-03
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Carlos,

Thanks very much for reviewing the DHCPv6 Failover Protocol draft!

To answer your question first, as Bernie mentioned, there is an
implementation which is substantially identical to the protocol
described in the draft. The on-the-wire packets are not compatible,
since there are no IANA numbers for anything at this point, but it is
essentially the same protocol.  The experience I could report is
simply that it *does* appear to work.  There have certainly been bugs
in the implementation, and there were some small issues early on that
were also protocol issues, but any fixes that were made to the
protocol were also rolled into previous versions of the draft, so that
the draft has reaped the benefit of some real-world experience.  There
wasn't much, actually, that changed because of that.  I expect that is
because this DHCPv6 draft is very similar to the DHCPv4 Failover
Protocol draft that went through 12 revisions before finally bogging
down in its own weight.  It finished at 133 pages, and I'll spare you
more of that story.  That said, the DHCPv4 version was implemented by
several companies, and that draft contained much that was learned
through those multiple implementations, which certainly informed the
work on this DHCPv6 Failover Protocol.

Regarding figures for Section 4.  I have created one that tries to
illustrate the example given in the text in Section 4.1.1.  It shows
both how the MCLT works as well as Lazy Update.  I will publish it in
the next version of the draft.  Here it is:
> Internet-Draft          DHCPv6 Failover Protocol            January =
2017
>=20
>=20
>       Fundamental relationship:
>       lease time =3D floor(desired lifetime, ack-partner-lifetime + =
MCLT)
>=20
>       Initial conditions: MCLT =3D 1h, desired lifetime =3D 3d
>=20
>                  DHCPv6               Primary             Secondary
>           time   Client               Server               Server
>=20
>                    | >-SOLICIT------>    |                    |
>                    |  acknowledged partner lifetime =3D 0       |
>                    |  lease time =3D floor( 3d, 0 + 1h ) =3D 1h   |
>                    |   <-----ADVERTISE-< |                    |
>                    |     lease-time=3D 1h  |                    |
>                    | >-REQUEST------>    |                    |
>             t      |   <---------REPLY-< |                    |
>                    |     lease-time=3D 1h  |                    |
>                    |                     |  >-BNDUPD------>   |
>                    |                     |  partner-lifetime =3D 1/2h =
+ 3d
>                    |                     |    <----BNDREPLY-< |
>                    |                     |  partner-lifetime =3D 1/2h =
+ 3d
>       1/2h passes ...                   ...                  ...
>          t+1/2h    | >-RENEW-------->    |                    |
>                    |   acknowledged partner lifetime =3D 3d     |
>                    |   lease time =3D floor( 3d, 3d + 1h ) =3D 3d |
>                    |   <---------REPLY-< |                    |
>                    |   lease-time=3D3d     |                    |
>                    |                     | >-BNDUPD------->   |
>                    |                     |  partner-lifetime =3D 1.5d =
+ 3d
>                    |                     |    <----BNDREPLY-< |
>                    |                     |  partner-lifetime =3D 1.5d =
+ 3d
>                        acknowledged partner lifetime =3D 1.5d + 3d
>       1.5d passes ...                   ...                  ...
>                    |                     |                    |
>      t+1.5d + 1/2h | >-RENEW-------->    |                    |
>                    |  acknowledged partner lifetime =3D 3d      |
>                    |   lease time =3D floor( 3d, 3d + 1h ) =3D 3d |
>                    |   <---------REPLY-< |                    |
>                    |   lease-time=3D3d     |                    |
>                    |                     | >-BNDUPD------->   |
>                    |                     |  partner-lifetime =3D 1.5d =
+ 3d
>                    |                     |    <----BNDREPLY-< |
>                    |                     |  partner-lifetime =3D 1.5d =
+ 3d
>                    | acknowledged partner lifetime =3D 1.5d + 3d|
>=20
>                           Figure 1: MCLT Example
>=20
>=20
>=20
>=20
>=20
>=20
> Mrugalski & Kinnear       Expires July 15, 2017                [Page =
17]
> =0C

I hope this helps folks get a better idea of some of the fundamental
ideas on which the draft is based. =20
Thanks again for the thoughtful review! =20

Regards -- Kim

> On Dec 24, 2016, at 2:55 AM, Carlos Bernardos <cjbc@it.uc3m.es> wrote:
>=20
> Reviewer: Carlos Bernardos
> Review result: Ready
>=20
> I am an assigned INT directorate reviewer for
> draft-ietf-dhc-dhcpv6-failover-protocol-03. 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 Last Call comments that have been received.
> For more details on the INT Directorate, see
> http://www.ietf.org/iesg/directorate.html.
>=20
> I'm not an expert in DHCPv6, so please consider this review as a light
> one. Keeping this in mind, please find my review below.
>=20
> Overall, I have not found any issue. I think the document is quite
> complete and deep. Actually, my main overall comment is that it is
> sometimes a bit hard to follow, due to its length and level of
> complexity. Since a protocol specification has to be precise, my only
> recommendation to address this would be to consider adding some
> figures in Section 4, for the reader to get a first overall idea.
>=20
> Question: is there any implementation available, so some experience
> gained from it can be reported (maybe as an annex)?
>=20


From nobody Thu Jan 12 05:49:29 2017
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: DHCP and DHCPv6 options for LWM2M services
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Date: Thu, 12 Jan 2017 14:08:10 +0000
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Cc: Amit Gupta X <amit.x.gupta@ericsson.com>, Jan Melen <jan.melen@ericsson.com>, =?iso-8859-1?Q?Ari_Ker=E4nen?= <ari.keranen@ericsson.com>, =?iso-8859-1?Q?Jaime_Jim=E9nez?= <jaime.jimenez@ericsson.com>
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Hi:

A couple of (I think) additional comments on this draft:


1.       It be best to use DHCPv4 and DHCPv6 (and use DHCP for when you are=
 specifically referring to both)? For example, it helps to be clear that an=
 option is a v4 vs v6 option.

2.       For the DHCPv4 , you don't need the sequence number in the OPTION_=
LWM2M_SERVER_CERTIFICATE option and much of the text below. DHCPv4 already =
supports LONG options (more than 255 bytes of data) - see RFC 3396 - Encodi=
ng Long Options in the Dynamic Host Configuration Protocol (DHCPv4). You ju=
st need to say that this option uses this encoding.

   Maximum possible value of DHCP "option-len" is 255.  LWM2M-server-
   certificate MAY be of length more than 255.  To accommodate larger
   certificate, it SHOULD be possible to include multiple
   OPTION_LWM2M_SERVER_CERTIFICATE options in same DHCP message.  DHCP
   server SHOULD be capable of including multiple
   OPTION_LWM2M_SERVER_CERTIFICATE options in same message.
   Certificates larger than 255 byte SHOULD be fragmented and adjusted
   in minimum possible number of OPTION_LWM2M_SERVER_CERTIFICATE
   options.  Each OPTION_LWM2M_SERVER_CERTIFICATE option is tagged with
   a sequence number which can be used by DHCP client to reassemble
   received certificate


-          Bernie

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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi:<o:p></o:p></span><=
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">A couple of (I think) =
additional comments on this draft:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">It be best to =
use DHCPv4 and DHCPv6 (and use DHCP for when you are specifically referring=
 to both)? For example, it helps to be clear that an option is a v4 vs v6 o=
ption.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">2.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">For the DHCPv4=
 , you don&#8217;t need the sequence number in the OPTION_LWM2M_SERVER_CERT=
IFICATE option and much of the text below. DHCPv4 already supports LONG opt=
ions (more than 255 bytes of data) &#8211; see
 RFC 3396 - Encoding Long Options in the Dynamic Host Configuration Protoco=
l (DHCPv4). You just need to say that this option uses this encoding.<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; Maximum possible value of DHCP =
&quot;option-len&quot; is 255.&nbsp; LWM2M-server-<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; certificate MAY be of length mo=
re than 255.&nbsp; To accommodate larger<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; certificate, it SHOULD be possi=
ble to include multiple<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; OPTION_LWM2M_SERVER_CERTIFICATE=
 options in same DHCP message.&nbsp; DHCP<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; server SHOULD be capable of inc=
luding multiple<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; OPTION_LWM2M_SERVER_CERTIFICATE=
 options in same message.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp; &nbsp;Certificates larger than 255 by=
te SHOULD be fragmented and adjusted<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; in minimum possible number of O=
PTION_LWM2M_SERVER_CERTIFICATE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; options.&nbsp; Each OPTION_LWM2=
M_SERVER_CERTIFICATE option is tagged with<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; a sequence number which can be =
used by DHCP client to reassemble<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:13.0pt;font-family:Courier"=
>&nbsp;&nbsp; received certificate</span><span style=3D"color:#1F497D"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Bernie<o:p></o=
:p></span></p>
</div>
</body>
</html>

--_000_a1c983ca2e7b41f4a39973d4c4b6aa05XCHALN003ciscocom_--


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From: <mohamed.boucadair@orange.com>
To: "Bernie Volz (volz)" <volz@cisco.com>, "draft-ietf-softwire-multicast-prefix-option.all@ietf.org" <draft-ietf-softwire-multicast-prefix-option.all@ietf.org>
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Subject: Re: [dhcwg] Review of draft-ietf-softwire-multicast-prefix-option-11
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From: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>
To: "Bernie Volz (volz)" <volz@cisco.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>
Thread-Topic: DHCP and DHCPv6 options for LWM2M services
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Cc: Amit Gupta X <amit.x.gupta@ericsson.com>, Jan Melen <jan.melen@ericsson.com>, =?iso-8859-1?Q?Ari_Ker=E4nen?= <ari.keranen@ericsson.com>, =?iso-8859-1?Q?Jaime_Jim=E9nez?= <jaime.jimenez@ericsson.com>
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Hi Bernie Volz,

Thanks for your review and comments.
#1 In genera in other documents 'DHCP' is used to indicate DHCP for IPv4 ne=
tworks and 'DHCPv6' is used to indicate DHCP for IPv6 networks. Anyhow what=
 you said makes sense  and looks clear way. I will consider for next versio=
n.

#2 I will consider this for next version.

Thanks & Regards
Srinivas

From: Bernie Volz (volz) [mailto:volz@cisco.com]
Sent: Thursday, January 12, 2017 7:38 PM
To: Srinivasa Rao Nalluri; dhcwg@ietf.org
Cc: Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit Gupta X
Subject: RE: DHCP and DHCPv6 options for LWM2M services

Hi:

A couple of (I think) additional comments on this draft:


1.       It be best to use DHCPv4 and DHCPv6 (and use DHCP for when you are=
 specifically referring to both)? For example, it helps to be clear that an=
 option is a v4 vs v6 option.

2.       For the DHCPv4 , you don't need the sequence number in the OPTION_=
LWM2M_SERVER_CERTIFICATE option and much of the text below. DHCPv4 already =
supports LONG options (more than 255 bytes of data) - see RFC 3396 - Encodi=
ng Long Options in the Dynamic Host Configuration Protocol (DHCPv4). You ju=
st need to say that this option uses this encoding.

   Maximum possible value of DHCP "option-len" is 255.  LWM2M-server-
   certificate MAY be of length more than 255.  To accommodate larger
   certificate, it SHOULD be possible to include multiple
   OPTION_LWM2M_SERVER_CERTIFICATE options in same DHCP message.  DHCP
   server SHOULD be capable of including multiple
   OPTION_LWM2M_SERVER_CERTIFICATE options in same message.
   Certificates larger than 255 byte SHOULD be fragmented and adjusted
   in minimum possible number of OPTION_LWM2M_SERVER_CERTIFICATE
   options.  Each OPTION_LWM2M_SERVER_CERTIFICATE option is tagged with
   a sequence number which can be used by DHCP client to reassemble
   received certificate


-          Bernie

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Bernie Volz,<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks for your review=
 and comments.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">#1 In genera in other =
documents &#8216;DHCP&#8217; is used to indicate DHCP for IPv4 networks and=
 &#8216;DHCPv6&#8217; is used to indicate DHCP for IPv6 networks. Anyhow wh=
at you said makes sense &nbsp;and looks clear way. I will consider
 for next version.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">#2 I will consider thi=
s for next version.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks &amp; Regards<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Srinivas<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Bernie V=
olz (volz) [mailto:volz@cisco.com]
<br>
<b>Sent:</b> Thursday, January 12, 2017 7:38 PM<br>
<b>To:</b> Srinivasa Rao Nalluri; dhcwg@ietf.org<br>
<b>Cc:</b> Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit Gupta X<br>
<b>Subject:</b> RE: DHCP and DHCPv6 options for LWM2M services<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">A couple of (I think) =
additional comments on this draft:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D"c=
olor:#1F497D">1.</span><span style=3D"font-size:7.0pt;font-family:&quot;Tim=
es New Roman&quot;,&quot;serif&quot;;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;
</span><span style=3D"color:#1F497D">It be best to use DHCPv4 and DHCPv6 (a=
nd use DHCP for when you are specifically referring to both)? For example, =
it helps to be clear that an option is a v4 vs v6 option.<o:p></o:p></span>=
</p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D"c=
olor:#1F497D">2.</span><span style=3D"font-size:7.0pt;font-family:&quot;Tim=
es New Roman&quot;,&quot;serif&quot;;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;
</span><span style=3D"color:#1F497D">For the DHCPv4 , you don&#8217;t need =
the sequence number in the OPTION_LWM2M_SERVER_CERTIFICATE option and much =
of the text below. DHCPv4 already supports LONG options (more than 255 byte=
s of data) &#8211; see RFC 3396 - Encoding Long
 Options in the Dynamic Host Configuration Protocol (DHCPv4). You just need=
 to say that this option uses this encoding.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; Maximum possible value of DHCP =
&quot;option-len&quot; is 255.&nbsp; LWM2M-server-<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; certificate MAY be of length mo=
re than 255.&nbsp; To accommodate larger<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; certificate, it SHOULD be possi=
ble to include multiple<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; OPTION_LWM2M_SERVER_CERTIFICATE=
 options in same DHCP message.&nbsp; DHCP<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; server SHOULD be capable of inc=
luding multiple<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; OPTION_LWM2M_SERVER_CERTIFICATE=
 options in same message.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp; &nbsp;Certificates larger than 255 by=
te SHOULD be fragmented and adjusted<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; in minimum possible number of O=
PTION_LWM2M_SERVER_CERTIFICATE<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; options.&nbsp; Each OPTION_LWM2=
M_SERVER_CERTIFICATE option is tagged with<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:13.0pt;font-family:Courier">&nbsp;&nbsp; a sequence number which can be =
used by DHCP client to reassemble<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:13.0pt;font-family:Courier"=
>&nbsp;&nbsp; received certificate</span><span style=3D"color:#1F497D"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D"c=
olor:#1F497D">-</span><span style=3D"font-size:7.0pt;font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"color:#1F497D">Bernie<o:p></o:p></span></p>
</div>
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "Naiming Shen (naiming)" <naiming@cisco.com>, dhcwg <dhcwg@ietf.org>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Thu, 12 Jan 2017 19:42:06 +0000
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Cc: "Enke Chen \(enkechen\)" <enkechen@cisco.com>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.txt
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From: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>
To: Ted Lemon <mellon@fugue.com>
Thread-Topic: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Cc: Amit Gupta X <amit.x.gupta@ericsson.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>, =?iso-8859-1?Q?Ari_Ker=E4nen?= <ari.keranen@ericsson.com>, =?iso-8859-1?Q?Jaime_Jim=E9nez?= <jaime.jimenez@ericsson.com>, Jan Melen <jan.melen@ericsson.com>
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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Content-Type: text/plain; charset="iso-8859-1"
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Hi,

To add more on certificate validation....

Idea is to trust your DHCP server to give valid certificate. Otherwise we h=
ave risk.
In TLS/PKI frame work there is no way to validate root certificate. That re=
mains same with our proposal.

In TLS root certificates are generally not exchanged using any protocol. So=
 risk is less.

Our proposal is trade-off between flexibility and risk

With regards
Srinivasa Rao Nalluri


From: Srinivasa Rao Nalluri
Sent: Tuesday, January 10, 2017 9:28 AM
To: 'Ted Lemon'
Cc: dhcwg@ietf.org; Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit Gupta X
Subject: RE: [dhcwg] DHCP and DHCPv6 options for LWM2M services

Hello Ted Lemon,

If I understand correct, you are asking how certificate supplied through DH=
CP option is validated.

The certificate supplied through DHCP option is not validated but it can be=
 used to validate certificate offered by LWM2M server during LWM2M bootstra=
pping phase.

Instead of hardcoding root certificate in device by manufacturer, we are pr=
oposing to obtain same through DHCP option.

In case I misunderstood your question, please elaborate same.

With Regards
Srinivas

From: Ted Lemon [mailto:mellon@fugue.com]
Sent: Monday, January 09, 2017 7:51 PM
To: Srinivasa Rao Nalluri
Cc: dhcwg@ietf.org<mailto:dhcwg@ietf.org>; Ari Ker=E4nen; Jan Melen; Jaime =
Jim=E9nez; Amit Gupta X
Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services

How would this be validated?

On Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri <srinivasa.rao.nalluri@er=
icsson.com<mailto:srinivasa.rao.nalluri@ericsson.com>> wrote:

Hi,

Considering growing popularity of Internet of Things and relevant protocols=
 like LWM2M/CoAP/MQTT, we in Ericsson see need for new DHCP options to make=
 LWM2M service deployment easy and flexible.

Light weight machine to machine (LWM2M) protocol is used to manage end devi=
ce life cycle in machine to machine communication scenarios.
LWM2M device bootstrap is an optional life cycle phase for devices to  get =
needed information when starting up for first time.  Information
gathered during bootstrapping might include management server details  and =
security certificates required to establish connectivity with
management server.  Information required to connect with bootstrap  server =
might be hard coded during device manufacturing phase.

Hard coding configuration by device manufacturer forces device  operator to=
 use same configuration as hard coded.  It is possible
that reachability information of bootstrap server that is hard coded may be=
 outdated and boot strap server reachability might fail during
first use of device.  In such cases connectivity with bootstrap server is p=
ossible only through device software upgrade.

So, we see need to introduce two options to support LWM2M server URL and LW=
M2M server certificate that validates public key provided by LWM2M server. =
Thus bootstrap related information can be gathered by LWM2M client during D=
HCP/DHCPv6 negotiation phase. Draft available at below link describes detai=
ls.

https://www.ietf.org/internet-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstr=
ap-options-01.txt

This draft considers options for both DHCP and DHCPv6.

I would like this draft to be considered by DHC working group as work item.=
 Please contact me for any further details.


With Regards
Srinivasa Rao Nalluri
Ericssion
India
_______________________________________________
dhcwg mailing list
dhcwg@ietf.org<mailto:dhcwg@ietf.org>
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">To add more on certificat=
e validation&#8230;.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Idea is to trust your DHC=
P server to give valid certificate. Otherwise we have risk.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">In TLS/PKI frame work the=
re is no way to validate root certificate. That remains same with our propo=
sal.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">In TLS root certificates =
are generally not exchanged using any protocol. So risk is less.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Our proposal is trade-off=
 between flexibility and risk<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">With regards<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Srinivasa Rao Nalluri<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Srinivas=
a Rao Nalluri
<br>
<b>Sent:</b> Tuesday, January 10, 2017 9:28 AM<br>
<b>To:</b> 'Ted Lemon'<br>
<b>Cc:</b> dhcwg@ietf.org; Ari Ker=E4nen; Jan Melen; Jaime Jim=E9nez; Amit =
Gupta X<br>
<b>Subject:</b> RE: [dhcwg] DHCP and DHCPv6 options for LWM2M services<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hello Ted Lemon,<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">If I understand correct, =
you are asking how certificate supplied through DHCP option is validated.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The certificate supplied =
through DHCP option is not validated but it can be used to validate certifi=
cate offered by LWM2M server during LWM2M bootstrapping
 phase. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Instead of hardcoding roo=
t certificate in device by manufacturer, we are proposing to obtain same th=
rough DHCP option.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">In case I misunderstood y=
our question, please elaborate same.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">With Regards<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Srinivas<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Ted Lemo=
n [<a href=3D"mailto:mellon@fugue.com">mailto:mellon@fugue.com</a>]
<br>
<b>Sent:</b> Monday, January 09, 2017 7:51 PM<br>
<b>To:</b> Srinivasa Rao Nalluri<br>
<b>Cc:</b> <a href=3D"mailto:dhcwg@ietf.org">dhcwg@ietf.org</a>; Ari Ker=E4=
nen; Jan Melen; Jaime Jim=E9nez; Amit Gupta X<br>
<b>Subject:</b> Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">How would this be validated?<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Jan 9, 2017, at 2:00 AM, Srinivasa Rao Nalluri &l=
t;<a href=3D"mailto:srinivasa.rao.nalluri@ericsson.com">srinivasa.rao.nallu=
ri@ericsson.com</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Hi,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Considering growing popularity of Inter=
net of Things and relevant protocols like LWM2M/CoAP/MQTT, we in Ericsson s=
ee need for new DHCP options to make LWM2M service deployment
 easy and flexible.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Light weight machine to machine (LWM2M)=
 protocol is used to manage end device life cycle in machine to machine com=
munication scenarios.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">LWM2M device bootstrap is an optional l=
ife cycle phase for devices to&nbsp; get needed information when starting u=
p for first time.&nbsp; Information<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">gathered during bootstrapping might inc=
lude management server details&nbsp; and security certificates required to =
establish connectivity with<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">management server.&nbsp; Information re=
quired to connect with bootstrap&nbsp; server might be hard coded during de=
vice manufacturing phase.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Hard coding configuration by device man=
ufacturer forces device&nbsp; operator to use same configuration as hard co=
ded.&nbsp; It is possible<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">that reachability information of bootst=
rap server that is hard coded may be outdated and boot strap server reachab=
ility might fail during<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">first use of device.&nbsp; In such case=
s connectivity with bootstrap server is possible only through device softwa=
re upgrade.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">So, we see need to introduce two option=
s to support LWM2M server URL and LWM2M server certificate that validates p=
ublic key provided by LWM2M server. Thus bootstrap related
 information can be gathered by LWM2M client during DHCP/DHCPv6 negotiation=
 phase. Draft available at below link describes details.<span class=3D"appl=
e-converted-space">&nbsp;</span><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><a href=3D"https://www.ietf.org/interne=
t-drafts/draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-01.txt"><span sty=
le=3D"color:purple">https://www.ietf.org/internet-drafts/draft-nalluri-dhc-=
dhcpv6-lwm2m-bootstrap-options-01.txt</span></a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">This draft considers options for both D=
HCP and DHCPv6.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">I would like this draft to be considere=
d by DHC working group as work item. Please contact me for any further deta=
ils.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">With Regards<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Srinivasa Rao Nalluri<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Ericssion<span class=3D"apple-converted=
-space">&nbsp;</span><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">India<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;He=
lvetica&quot;,&quot;sans-serif&quot;">_____________________________________=
__________<br>
dhcwg mailing list<br>
</span><a href=3D"mailto:dhcwg@ietf.org"><span style=3D"font-size:10.5pt;fo=
nt-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;color:purple">dhcwg@=
ietf.org</span></a><span style=3D"font-size:10.5pt;font-family:&quot;Helvet=
ica&quot;,&quot;sans-serif&quot;"><br>
</span><a href=3D"https://www.ietf.org/mailman/listinfo/dhcwg"><span style=
=3D"font-size:10.5pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quo=
t;;color:purple">https://www.ietf.org/mailman/listinfo/dhcwg</span></a><o:p=
></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</body>
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To: Srinivasa Rao Nalluri <srinivasa.rao.nalluri@ericsson.com>
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Subject: Re: [dhcwg] DHCP and DHCPv6 options for LWM2M services
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On Jan 13, 2017, at 1:45 AM, Srinivasa Rao Nalluri =
<srinivasa.rao.nalluri@ericsson.com> wrote:
> Idea is to trust your DHCP server to give valid certificate. Otherwise =
we have risk.

Right, but on what basis do you trust the DHCP server?   There is no =
authentication, and no pre-established trust relationship if there were =
authentication.



--Apple-Mail=_58F54C62-FFFA-42F6-A7B3-67C397103704
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=us-ascii

<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-line-break: after-white-space;" =
class=3D"">On Jan 13, 2017, at 1:45 AM, Srinivasa Rao Nalluri &lt;<a =
href=3D"mailto:srinivasa.rao.nalluri@ericsson.com" =
class=3D"">srinivasa.rao.nalluri@ericsson.com</a>&gt; =
wrote:<div><blockquote type=3D"cite" class=3D""><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Idea is to trust your =
DHCP server to give valid certificate. Otherwise we have =
risk.</span></div></div></blockquote><br class=3D""></div><div>Right, =
but on what basis do you trust the DHCP server? &nbsp; There is no =
authentication, and no pre-established trust relationship if there were =
authentication.</div><div><br class=3D""></div><br =
class=3D""></body></html>=

--Apple-Mail=_58F54C62-FFFA-42F6-A7B3-67C397103704--


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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
To: kkinnear <kkinnear@cisco.com>
Date: Sun, 15 Jan 2017 20:24:59 +0100
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Subject: Re: [dhcwg] Review of draft-ietf-dhc-dhcpv6-failover-protocol-03
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Hi Kim,

Thanks a lot for the additional explanations. They definitely help.

I also like the new figure.

Thanks,

Carlos

On Wed, 2017-01-11 at 15:26 -0500, kkinnear wrote:
> Carlos,
> 
> Thanks very much for reviewing the DHCPv6 Failover Protocol draft!
> 
> To answer your question first, as Bernie mentioned, there is an
> implementation which is substantially identical to the protocol
> described in the draft. The on-the-wire packets are not compatible,
> since there are no IANA numbers for anything at this point, but it is
> essentially the same protocol.  The experience I could report is
> simply that it *does* appear to work.  There have certainly been bugs
> in the implementation, and there were some small issues early on that
> were also protocol issues, but any fixes that were made to the
> protocol were also rolled into previous versions of the draft, so
> that
> the draft has reaped the benefit of some real-world
> experience.  There
> wasn't much, actually, that changed because of that.  I expect that
> is
> because this DHCPv6 draft is very similar to the DHCPv4 Failover
> Protocol draft that went through 12 revisions before finally bogging
> down in its own weight.  It finished at 133 pages, and I'll spare you
> more of that story.  That said, the DHCPv4 version was implemented by
> several companies, and that draft contained much that was learned
> through those multiple implementations, which certainly informed the
> work on this DHCPv6 Failover Protocol.
> 
> Regarding figures for Section 4.  I have created one that tries to
> illustrate the example given in the text in Section 4.1.1.  It shows
> both how the MCLT works as well as Lazy Update.  I will publish it in
> the next version of the draft.  Here it is:
> > Internet-Draft          DHCPv6 Failover Protocol            January
> > 2017
> > 
> > 
> >       Fundamental relationship:
> >       lease time = floor(desired lifetime, ack-partner-lifetime +
> > MCLT)
> > 
> >       Initial conditions: MCLT = 1h, desired lifetime = 3d
> > 
> >                  DHCPv6               Primary             Secondary
> >           time   Client               Server               Server
> > 
> >                    | >-SOLICIT------>    |                    |
> >                    |  acknowledged partner lifetime = 0       |
> >                    |  lease time = floor( 3d, 0 + 1h ) = 1h   |
> >                    |   <-----ADVERTISE-< |                    |
> >                    |     lease-time= 1h  |                    |
> >                    | >-REQUEST------>    |                    |
> >             t      |   <---------REPLY-< |                    |
> >                    |     lease-time= 1h  |                    |
> >                    |                     |  >-BNDUPD------>   |
> >                    |                     |  partner-lifetime = 1/2h
> > + 3d
> >                    |                     |    <----BNDREPLY-< |
> >                    |                     |  partner-lifetime = 1/2h
> > + 3d
> >       1/2h passes ...                   ...                  ...
> >          t+1/2h    | >-RENEW-------->    |                    |
> >                    |   acknowledged partner lifetime = 3d     |
> >                    |   lease time = floor( 3d, 3d + 1h ) = 3d |
> >                    |   <---------REPLY-< |                    |
> >                    |   lease-time=3d     |                    |
> >                    |                     | >-BNDUPD------->   |
> >                    |                     |  partner-lifetime = 1.5d
> > + 3d
> >                    |                     |    <----BNDREPLY-< |
> >                    |                     |  partner-lifetime = 1.5d
> > + 3d
> >                        acknowledged partner lifetime = 1.5d + 3d
> >       1.5d passes ...                   ...                  ...
> >                    |                     |                    |
> >      t+1.5d + 1/2h | >-RENEW-------->    |                    |
> >                    |  acknowledged partner lifetime = 3d      |
> >                    |   lease time = floor( 3d, 3d + 1h ) = 3d |
> >                    |   <---------REPLY-< |                    |
> >                    |   lease-time=3d     |                    |
> >                    |                     | >-BNDUPD------->   |
> >                    |                     |  partner-lifetime = 1.5d
> > + 3d
> >                    |                     |    <----BNDREPLY-< |
> >                    |                     |  partner-lifetime = 1.5d
> > + 3d
> >                    | acknowledged partner lifetime = 1.5d + 3d|
> > 
> >                           Figure 1: MCLT Example
> > 
> > 
> > 
> > 
> > 
> > 
> > Mrugalski & Kinnear       Expires July 15,
> > 2017                [Page 17]
> > 
> 
> I hope this helps folks get a better idea of some of the fundamental
> ideas on which the draft is based.  
> Thanks again for the thoughtful review!  
> 
> Regards -- Kim
> 
> > On Dec 24, 2016, at 2:55 AM, Carlos Bernardos <cjbc@it.uc3m.es>
> > wrote:
> > 
> > Reviewer: Carlos Bernardos
> > Review result: Ready
> > 
> > I am an assigned INT directorate reviewer for
> > draft-ietf-dhc-dhcpv6-failover-protocol-03. 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 Last Call comments that have been
> > received.
> > For more details on the INT Directorate, see
> > http://www.ietf.org/iesg/directorate.html.
> > 
> > I'm not an expert in DHCPv6, so please consider this review as a
> > light
> > one. Keeping this in mind, please find my review below.
> > 
> > Overall, I have not found any issue. I think the document is quite
> > complete and deep. Actually, my main overall comment is that it is
> > sometimes a bit hard to follow, due to its length and level of
> > complexity. Since a protocol specification has to be precise, my
> > only
> > recommendation to address this would be to consider adding some
> > figures in Section 4, for the reader to get a first overall idea.
> > 
> > Question: is there any implementation available, so some experience
> > gained from it can be reported (maybe as an annex)?
> > 
> 
> 


From nobody Mon Jan 16 01:03:16 2017
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Subject: [dhcwg] I-D Action: draft-ietf-dhc-sedhcpv6-20.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 Dynamic Host Configuration of the IETF.

        Title           : Secure DHCPv6
        Authors         : Sheng Jiang
                          Lishan Li
                          Yong Cui
                          Tatuya Jinmei
                          Ted Lemon
                          Dacheng Zhang
	Filename        : draft-ietf-dhc-sedhcpv6-20.txt
	Pages           : 31
	Date            : 2017-01-16

Abstract:
   DHCPv6 includes no deployable security mechanism that can protect
   end-to-end communication between DHCP clients and servers.  This
   document describes a mechanism for using public key cryptography to
   provide such security.  The mechanism provides encryption in all
   cases, and can be used for authentication based on pre-sharing of
   authorized certificates.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dhc-sedhcpv6/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-dhc-sedhcpv6-20

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dhc-sedhcpv6-20


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

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


From nobody Mon Jan 16 01:10:31 2017
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Content-Type: text/plain; charset=UTF-8

Dear All,

We have submitted a new version of secure DHCPv6. Thanks a lot for Bernie's
valuable comment.
In this version, we made the following update:
1. In client behavior part, we adds some description about opportunistic
security. In this way, in some scenario, authentication is optional.
2. Add the reference of RFC 4034 for the encryption key tag calculation.
3. Delete the part that the relay agent cache server announcements part.
4. Add the assumption that the client's initial stored increasing number is
set to zero. In this way, for the first time increasing number check in the
Reply message, the check will always succeed, and then the locally stored
number is changed into the contained number in the Reply message.
5. Correct many grammar mistakes.

Looking forward to your review and guidance. Thanks in advance.

Best Regards,
Lishan

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: 2017-01-16 17:03 GMT+08:00
Subject: New Version Notification for draft-ietf-dhc-sedhcpv6-20.txt
To: Ted Lemon <ted.lemon@nominum.com>, Tatuya Jinmei <jinmei@wide.ad.jp>,
Sheng Jiang <jiangsheng@huawei.com>, Dacheng Zhang <dacheng.zhang@gmail.com>,
dhc-chairs@ietf.org, Lishan Li <lilishan48@gmail.com>, Yong Cui <
yong@csnet1.cs.tsinghua.edu.cn>, Ted Lemon <Ted.Lemon@nominum.com>



A new version of I-D, draft-ietf-dhc-sedhcpv6-20.txt
has been successfully submitted by Lishan Li and posted to the
IETF repository.

Name:           draft-ietf-dhc-sedhcpv6
Revision:       20
Title:          Secure DHCPv6
Document date:  2017-01-16
Group:          dhc
Pages:          31
URL:            https://www.ietf.org/internet-drafts/draft-ietf-dhc-
sedhcpv6-20.txt
Status:         https://datatracker.ietf.org/doc/draft-ietf-dhc-sedhcpv6/
Htmlized:       https://tools.ietf.org/html/draft-ietf-dhc-sedhcpv6-20
Diff:           https://www.ietf.org/rfcdiff?url2=draft-ietf-dhc-sedhcpv6-20

Abstract:
   DHCPv6 includes no deployable security mechanism that can protect
   end-to-end communication between DHCP clients and servers.  This
   document describes a mechanism for using public key cryptography to
   provide such security.  The mechanism provides encryption in all
   cases, and can be used for authentication based on pre-sharing of
   authorized certificates.




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

The IETF Secretariat

--001a11427f8ee9ea7c0546328d99
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear All,<div><br></div><div>We have submitted a new versi=
on of secure DHCPv6. Thanks a lot for Bernie&#39;s valuable comment.=C2=A0<=
/div><div>In this version, we made the following update:</div><div>1. In cl=
ient behavior part, we adds some description about opportunistic security. =
In this way, in some scenario, authentication is optional.</div><div>2. Add=
 the reference of RFC 4034 for the encryption key tag calculation.<br></div=
><div>3. Delete the part that the relay agent cache server announcements pa=
rt.</div><div>4. Add the assumption that the client&#39;s initial stored in=
creasing number is set to zero. In this way, for the first time increasing =
number check in the Reply message, the check will always succeed, and then =
the locally stored number is changed into the contained number in the Reply=
 message.</div><div>5. Correct many grammar mistakes.</div><div><br></div><=
div>Looking forward to your review and guidance. Thanks in advance.</div><d=
iv><br></div><div>Best Regards,</div><div>Lishan</div><div><br></div><div c=
lass=3D"gmail_quote">---------- Forwarded message ----------<br>From: <b cl=
ass=3D"gmail_sendername"></b> <span dir=3D"ltr">&lt;<a href=3D"mailto:inter=
net-drafts@ietf.org">internet-drafts@ietf.org</a>&gt;</span><br>Date: 2017-=
01-16 17:03 GMT+08:00<br>Subject: New Version Notification for draft-ietf-d=
hc-sedhcpv6-20.txt<br>To: Ted Lemon &lt;<a href=3D"mailto:ted.lemon@nominum=
.com">ted.lemon@nominum.com</a>&gt;, Tatuya Jinmei &lt;<a href=3D"mailto:ji=
nmei@wide.ad.jp">jinmei@wide.ad.jp</a>&gt;, Sheng Jiang &lt;<a href=3D"mail=
to:jiangsheng@huawei.com">jiangsheng@huawei.com</a>&gt;, Dacheng Zhang &lt;=
<a href=3D"mailto:dacheng.zhang@gmail.com">dacheng.zhang@gmail.com</a>&gt;,=
 <a href=3D"mailto:dhc-chairs@ietf.org">dhc-chairs@ietf.org</a>, Lishan Li =
&lt;<a href=3D"mailto:lilishan48@gmail.com">lilishan48@gmail.com</a>&gt;, Y=
ong Cui &lt;<a href=3D"mailto:yong@csnet1.cs.tsinghua.edu.cn">yong@csnet1.c=
s.tsinghua.edu.cn</a>&gt;, Ted Lemon &lt;<a href=3D"mailto:Ted.Lemon@nominu=
m.com">Ted.Lemon@nominum.com</a>&gt;<br><br><br><br>
A new version of I-D, draft-ietf-dhc-sedhcpv6-20.txt<br>
has been successfully submitted by Lishan Li and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-dhc-sedhcpv6<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A020<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Secure DHCPv6<br>
Document date:=C2=A0 2017-01-16<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 dhc<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 31<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-ietf-dhc-sedhcpv6-20.txt" rel=3D"noreferrer" targe=
t=3D"_blank">https://www.ietf.org/internet-<wbr>drafts/draft-ietf-dhc-<wbr>=
sedhcpv6-20.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-ietf-dhc-sedhcpv6/" rel=3D"noreferrer" target=3D"_blank">ht=
tps://datatracker.ietf.org/<wbr>doc/draft-ietf-dhc-sedhcpv6/</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-ietf-dhc-sedhcpv6-20" rel=3D"noreferrer" target=3D"_blank">https://to=
ols.ietf.org/html/<wbr>draft-ietf-dhc-sedhcpv6-20</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-ietf-dhc-sedhcpv6-20" rel=3D"noreferrer" target=3D"=
_blank">https://www.ietf.org/rfcdiff?<wbr>url2=3Ddraft-ietf-dhc-sedhcpv6-<w=
br>20</a><br>
<br>
Abstract:<br>
=C2=A0 =C2=A0DHCPv6 includes no deployable security mechanism that can prot=
ect<br>
=C2=A0 =C2=A0end-to-end communication between DHCP clients and servers.=C2=
=A0 This<br>
=C2=A0 =C2=A0document describes a mechanism for using public key cryptograp=
hy to<br>
=C2=A0 =C2=A0provide such security.=C2=A0 The mechanism provides encryption=
 in all<br>
=C2=A0 =C2=A0cases, and can be used for authentication based on pre-sharing=
 of<br>
=C2=A0 =C2=A0authorized certificates.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div><br></div>

--001a11427f8ee9ea7c0546328d99--


From nobody Mon Jan 16 11:37:45 2017
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From: Carlos Pignataro <cpignata@gmail.com>
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Cc: dhcwg@ietf.org, draft-ietf-dhc-dhcpv6-failover-protocol.all@ietf.org
Subject: [dhcwg] Review of draft-ietf-dhc-dhcpv6-failover-protocol-03
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Reviewer: Carlos Pignataro
Review result: Ready

This document is in great shape, and I do not see any missing
operational considerations. Defaults are appropriately defined.

I will note that there is a response at
https://mailarchive.ietf.org/arch/msg/int-dir/zJ147M2VjQxTCOyRT7OQ42NYzco
that states that additional figures are forthcoming. I think those
will help (although I am biased as a visual person), and would
encourage the new revision to be posted sooner rather than later.

Thanks,

-- Carlos.


From nobody Wed Jan 18 13:18:59 2017
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: "Bernie Volz (volz)" <volz@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "Naiming Shen (naiming)" <naiming@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Wed, 18 Jan 2017 21:54:34 +0000
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Cc: dhcwg <dhcwg@ietf.org>, "Enke Chen \(enkechen\)" <enkechen@cisco.com>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.txt
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: "Bernie Volz (volz)" <volz@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Wed, 18 Jan 2017 22:15:01 +0000
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References: <148374230973.17537.14402355403407250708.idtracker@ietfa.amsl.com> <843031F0-B818-4C19-8120-78EE7D531E06@cisco.com> <4328855a5add4c3a9f044689171156f7@XCH-ALN-003.cisco.com> <15E46807-72A1-49FC-8E67-A1967243EFA0@cisco.com> <5841cbedc07e485d8499006469968bb1@XCH-ALN-003.cisco.com>
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "Naiming Shen (naiming)" <naiming@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Wed, 18 Jan 2017 22:35:30 +0000
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Cc: dhcwg <dhcwg@ietf.org>, "Enke Chen \(enkechen\)" <enkechen@cisco.com>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.txt
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: "Bernie Volz (volz)" <volz@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Thu, 19 Jan 2017 00:24:12 +0000
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References: <148374230973.17537.14402355403407250708.idtracker@ietfa.amsl.com> <843031F0-B818-4C19-8120-78EE7D531E06@cisco.com> <4328855a5add4c3a9f044689171156f7@XCH-ALN-003.cisco.com> <15E46807-72A1-49FC-8E67-A1967243EFA0@cisco.com> <5841cbedc07e485d8499006469968bb1@XCH-ALN-003.cisco.com> <746A7C3D-B6A2-462B-91FF-1AE831715DE5@cisco.com> <31b8c717127f43928d0bcb8a5dc71aeb@XCH-ALN-003.cisco.com>
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Cc: dhcwg <dhcwg@ietf.org>, "Enke Chen \(enkechen\)" <enkechen@cisco.com>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.txt
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Cc: "draft-ietf-dhc-dhcpv6-prefix-length-hint-issue.all@ietf.org" <draft-ietf-dhc-dhcpv6-prefix-length-hint-issue.all@ietf.org>
Subject: [dhcwg] AD evaluation: draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-04
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Hi all,
  I have gone through draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-04 and=
 have I found no technical issues.The draft does seem to fail ID nits check=
ing due to the reference to RFC3633 in the abstract. Can you remove the ref=
erence and submit a new revision. I will send it on to IETF Last call as so=
on as the new version hits.

Thanks
Suresh


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Subject: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-failover-protocol-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 Dynamic Host Configuration of the IETF.

        Title           : DHCPv6 Failover Protocol
        Authors         : Tomasz Mrugalski
                          Kim Kinnear
	Filename        : draft-ietf-dhc-dhcpv6-failover-protocol-04.txt
	Pages           : 92
	Date            : 2017-01-20

Abstract:
   DHCPv6 as defined in "Dynamic Host Configuration Protocol for IPv6
   (DHCPv6)" (RFC3315) does not offer server redundancy.  This document
   defines a protocol implementation to provide DHCPv6 failover, a
   mechanism for running two servers with the capability for either
   server to take over clients' leases in case of server failure or
   network partition.  It meets the requirements for DHCPv6 failover
   detailed in "DHCPv6 Failover Requirements" (RFC7031).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-failover-protocol/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-failover-protocol-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dhc-dhcpv6-failover-protocol-04


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

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


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From: "Bernie Volz (volz)" <volz@cisco.com>
To: dhcwg <dhcwg@ietf.org>
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From: "Naiming Shen (naiming)" <naiming@cisco.com>
To: "Bernie Volz (volz)" <volz@cisco.com>
Thread-Topic: I-D Action: draft-ietf-dhc-relay-port-01.txt
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Date: Fri, 20 Jan 2017 23:41:55 +0000
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Cc: dhcwg <dhcwg@ietf.org>, "Enke Chen \(enkechen\)" <enkechen@cisco.com>
Subject: Re: [dhcwg] I-D Action: draft-ietf-dhc-relay-port-01.txt
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No problem Bernie. Thanks!

Regards,
- Naiming

On Jan 20, 2017, at 3:23 PM, Bernie Volz (volz) <volz@cisco.com<mailto:volz=
@cisco.com>> wrote:

Hi:

After an offline discussion, I am fine with the general proposal of how the=
 DHCPv6 handling is per the -01 draft. Sorry for my misunderstanding and th=
e distraction.

-          Bernie


--_000_1878562966FF44D0B4A3C7A6CDC2F73Bciscocom_
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e-break: after-white-space;" class=3D"">
<div class=3D""><br class=3D"">
</div>
No problem Bernie. Thanks!
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Regards,</div>
<div class=3D"">- Naiming</div>
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Jan 20, 2017, at 3:23 PM, Bernie Volz (volz) &lt;<a href=
=3D"mailto:volz@cisco.com" class=3D"">volz@cisco.com</a>&gt; wrote:</div>
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<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
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s New Roman', serif;" class=3D"">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);" class=3D"">After an offline discussion, I am fine with the=
 general proposal of how the DHCPv6 handling is per the -01 draft. Sorry fo=
r my misunderstanding and the distraction.<o:p class=3D""></o:p></span></di=
v>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
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<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);" class=3D""><span class=3D"">-<span style=3D"font-style: no=
rmal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-=
height: normal; font-family: 'Times New Roman';" class=3D"">&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"Apple-converted-space=
">&nbsp;</span></span></span></span><span style=3D"font-size: 11pt; font-fa=
mily: Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Bernie</spa=
n></div>
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</body>
</html>

--_000_1878562966FF44D0B4A3C7A6CDC2F73Bciscocom_--


From nobody Mon Jan 23 12:03:20 2017
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From: kkinnear <kkinnear@cisco.com>
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Date: Mon, 23 Jan 2017 15:03:16 -0500
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Subject: [dhcwg] draft-ietf-dhc-dhcpv6-failover-protocol-04.txt
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I have posted a new version of the DHCPv6 failover draft:

	draft-ietf-dhc-dhcpv6-failover-protocol-04.txt.

It contains the following relatively minor editorial changes 
from the -03.txt:

1. A sequence diagram was added to Section 4.4.1 to better explain
   the example given of the way that the MCLT can operate.

2. The text explaining the bit orientation of the flags was
   corrected in Sections:

  5.5.2 OPTION_F_CONNECT_FLAGS 
  5.5.6 OPTION_F_DNS_FLAGS
  5.5.18 OPTION_F_SERVER_FLAGS

3. The bits which are MBZ in Section 5.5.18 OPTION_F_SERVER_FLAGS
   were corrected and the ordering of the bit descriptions was brought
   into line with the other options.
  
4. The spelling in Section 12 of Shawn Routhier's name was
   corrected.

There were no changes to the protocol due to these corrections
and additions.

Regards -- Kim


From nobody Tue Jan 24 04:49:35 2017
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To: dhcwg@ietf.org
References: <ae393eb62fa84261bc4b182309a767ba@XCH-ALN-003.cisco.com>
From: Tomek Mrugalski <tomasz.mrugalski@gmail.com>
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Date: Tue, 24 Jan 2017 13:49:27 +0100
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Subject: [dhcwg] Reminder for IETF'98 (Chicago) DHC WG Session Agenda Requests - by January 31, 2017!
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Hi,

This is a remainder for people who would like to present in Chicago to
submit slot request. The meeting still 2 months away, so we don't expect
the requests to be super detailed. Nevertheless Bernie and I need it to
assess how much time we need for the DHC meeting. This is not a
bookkeeping exercise only. We're supposed to justify any time we
request. Given that Seoul meeting took only 40 minutes and we have
received only 2 slots (with one of them being a recurring one -
dhcpv6bis), we do not have enough presentations to get a long slot.

In fact Bernie and I discussed whether we need to have a meeting in
Chicago at all. So far we're leaning towards requesting a very small
slot (30 mins? 1h?), but we haven't made any decisions yet. This means
that if you want to present something, but won't express your intent
soon, you'll likely not get a slot later.

Bernie & Tomek


From nobody Wed Jan 25 20:03:01 2017
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Subject: [dhcwg] I-D Action: draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05.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 Dynamic Host Configuration of the IETF.

        Title           : DHCPv6 Prefix Length Hint Issues
        Authors         : Tianxiang Li
                          Cong Liu
                          Yong Cui
	Filename        : draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05.txt
	Pages           : 9
	Date            : 2017-01-25

Abstract:
   DHCPv6 Prefix Delegation (RFC3633) allows a client to include a
   prefix-length hint value in the IA_PD option to indicate a preference
   for the size of the prefix to be delegated, but is unclear about how
   the client and server should act in different situations involving
   the prefix-length hint.  This document provides a summary of the
   existing problems with the prefix-length hint and guidance on what
   the client and server could do in different situations.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-prefix-length-hint-issue/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05


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

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


From nobody Wed Jan 25 20:11:07 2017
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From: tianxiang li <peter416733@gmail.com>
Date: Thu, 26 Jan 2017 12:10:23 +0800
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To: Suresh Krishnan <suresh.krishnan@ericsson.com>
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Cc: "dhcwg@ietf.org" <dhcwg@ietf.org>, "draft-ietf-dhc-dhcpv6-prefix-length-hint-issue.all@ietf.org" <draft-ietf-dhc-dhcpv6-prefix-length-hint-issue.all@ietf.org>
Subject: Re: [dhcwg] AD evaluation: draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-04
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--001a113d3d2eaa100f0546f789ba
Content-Type: text/plain; charset=UTF-8

Hi Suresh,

Thank you for the review. We've just submitted a new version of the draft
(draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05), and removed the
reference to RFC3633 in the abstract.

Thanks,
Tianxiang

2017-01-19 10:51 GMT+08:00 Suresh Krishnan <suresh.krishnan@ericsson.com>:

> Hi all,
>   I have gone through draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-04
> and have I found no technical issues.The draft does seem to fail ID nits
> checking due to the reference to RFC3633 in the abstract. Can you remove
> the reference and submit a new revision. I will send it on to IETF Last
> call as soon as the new version hits.
>
> Thanks
> Suresh
>
>

--001a113d3d2eaa100f0546f789ba
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Suresh,<div><br></div><div>Thank you for the review. We=
&#39;ve just submitted a new version of the draft (draft-ietf-dhc-dhcpv6-pr=
efix-length-hint-issue-05), and removed the reference to RFC3633 in the abs=
tract.</div><div><br></div><div>Thanks,</div><div>Tianxiang</div></div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote">2017-01-19 10:51 GMT+=
08:00 Suresh Krishnan <span dir=3D"ltr">&lt;<a href=3D"mailto:suresh.krishn=
an@ericsson.com" target=3D"_blank">suresh.krishnan@ericsson.com</a>&gt;</sp=
an>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
=C2=A0 I have gone through draft-ietf-dhc-dhcpv6-prefix-<wbr>length-hint-is=
sue-04 and have I found no technical issues.The draft does seem to fail ID =
nits checking due to the reference to RFC3633 in the abstract. Can you remo=
ve the reference and submit a new revision. I will send it on to IETF Last =
call as soon as the new version hits.<br>
<br>
Thanks<br>
<span class=3D"HOEnZb"><font color=3D"#888888">Suresh<br>
<br>
</font></span></blockquote></div><br></div>

--001a113d3d2eaa100f0546f789ba--


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From nobody Wed Jan 25 22:45:15 2017
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Subject: [dhcwg] Review of draft-ietf-dhc-relay-server-security-02
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Reviewer: Jouni Korhonen
Review result: Not Ready

Disclaimer: I have not followed recent DHC discussions to the extent
that the existence this document was new to me.

Issues:

My issues with the document are the following. First, it actually
updates a great deal of RFC3315 (Section 21.1) while there is
RFC3315bis in progress. Why the DHCPv6 part of this document is not
directly contributed to RFC3315bis work? There's even author overlap
so there must be a good reason. Second, if there is a reason to keep
the content of this document separate from RFC3315 body of work, at
least this specification should then target to update RFC3315bis and
not RFC3315.

Other smaller nits:

o This document updates both RFC3315(bis) and RFC1542. Those are not
reflected in the document title page and abstract. 

o I would separate the new recommendation text for DHCPv4 and DHCPv6
into their own respective section. Having just a one-liner statement
"also applies to DHCPv4 [RFC1542].." is kind of confusing in a middle
of very DHCPv6 specific text. I recon the DHCPv4 section would be
short, but definitely more clear in that way.

o Although it should be obvious, but I would explicitly point it out
in the Security Considerations that the security model here is
hop-by-hop. If there are multiple relays then there will be multiple
IPsec tunnels as well.

o Section 14:  s/section 14,/Section 14,

o 


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From: Tomek Mrugalski <tomasz.mrugalski@gmail.com>
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Subject: Re: [dhcwg] Review of draft-ietf-dhc-relay-server-security-02
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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">W dniu 26.01.2017 o 07:45, Jouni
      Korhonen pisze:<br>
    </div>
    <blockquote
cite="mid:148541310715.6205.3276873953603821357.idtracker@ietfa.amsl.com"
      type="cite">
      <pre wrap="">Reviewer: Jouni Korhonen
Review result: Not Ready

Disclaimer: I have not followed recent DHC discussions to the extent
that the existence this document was new to me.

Issues:

My issues with the document are the following. First, it actually
updates a great deal of RFC3315 (Section 21.1) while there is
RFC3315bis in progress. Why the DHCPv6 part of this document is not
directly contributed to RFC3315bis work? There's even author overlap
so there must be a good reason. Second, if there is a reason to keep
the content of this document separate from RFC3315 body of work, at
least this specification should then target to update RFC3315bis and
not RFC3315.</pre>
    </blockquote>
    Hi Jouni,<br>
    First of all, thanks for doing the review.<br>
    <br>
    I will leave it up to the authors to provide further details on
    this, but with my shepherd hat on, let me explain that this omission
    was made on purpose. The decision was made to not update 3315 and
    not bundle this into 3315bis on purpose. If we did that, then every
    DHCP server would HAVE to support IPSec. This would make
    implementation, certification and deployment much more complex and
    this is something we wanted to avoid. With the current approach,
    operators can be specific whether they need relay server security
    (by requiring their vendors to support both 3315 and this document)
    or not (just 3315).<br>
    <br>
    This is also explained in the write-up:<br>
    <pre class="pasted">(16) Will publication of this document change the status of any
existing RFCs? Are those RFCs listed on the title page header, listed
in the abstract, and discussed in the introduction? If the RFCs are not
listed in the Abstract and Introduction, explain why, and point to the
part of the document where the relationship of this document to the
other RFCs is discussed. If this information is not in the document,
explain why the WG considers it unnecessary.

  No. Even though this I-D introduces changes to RFC3315, the WG doesn't
  want to enforce IPsec encryption on every DHCPv6 server. Therefore
  it does not update RFC3315.</pre>
    <br>
    <br>
    Also, I'd like to clarify that 3315bis is not a wildcard that
    bundles every RFC related to DHCPv6 ever published. This document is
    133 pages long and that size causes difficulties moving the work
    forward. We're thinking what are the things we can take out of it,
    rather what else we could add. The previous argument still stands
    here. We want to have the core spec and an additional RFC that
    people can point to when they require secure server-relay
    communication.<br>
    <br>
    If that explanation is not acceptable for you, how do you propose to
    structure the text and possibly add updates 2131/3315 to achieve the
    goal or being a non-mandatory feature?<br>
    <br>
    I'll let the authors comment on the nits.<br>
    <br>
    Again, thanks for the review. It's good to receive one that shakes
    things up a bit once in a while :)<br>
    Tomek<br>
    <blockquote
cite="mid:148541310715.6205.3276873953603821357.idtracker@ietfa.amsl.com"
      type="cite">
      <pre wrap="">Other smaller nits:

o This document updates both RFC3315(bis) and RFC1542. Those are not
reflected in the document title page and abstract. 

o I would separate the new recommendation text for DHCPv4 and DHCPv6
into their own respective section. Having just a one-liner statement
"also applies to DHCPv4 [RFC1542].." is kind of confusing in a middle
of very DHCPv6 specific text. I recon the DHCPv4 section would be
short, but definitely more clear in that way.

o Although it should be obvious, but I would explicitly point it out
in the Security Considerations that the security model here is
hop-by-hop. If there are multiple relays then there will be multiple
IPsec tunnels as well.

o Section 14:  s/section 14,/Section 14,

o 

</pre>
    </blockquote>
    <p><br>
    </p>
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Tomek Mrugalski <tomasz.mrugalski@gmail.com>, Jouni Korhonen <jounikor@gmail.com>, "int-dir@ietf.org" <int-dir@ietf.org>
Thread-Topic: Review of draft-ietf-dhc-relay-server-security-02
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Subject: [dhcwg] Last Call: <draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05.txt> (DHCPv6 Prefix Length Hint Issues) to Proposed Standard
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The IESG has received a request from the Dynamic Host Configuration WG
(dhc) to consider the following document:
- 'DHCPv6 Prefix Length Hint Issues'
  <draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05.txt> as Proposed
Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-02-09. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   DHCPv6 Prefix Delegation (RFC3633) allows a client to include a
   prefix-length hint value in the IA_PD option to indicate a preference
   for the size of the prefix to be delegated, but is unclear about how
   the client and server should act in different situations involving
   the prefix-length hint.  This document provides a summary of the
   existing problems with the prefix-length hint and guidance on what
   the client and server could do in different situations.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-prefix-length-hint-issue/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-prefix-length-hint-issue/ballot/


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





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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Bernie, Tomek,


> On Jan 26, 2017, at 5:38 AM, Bernie Volz (volz) <volz@cisco.com> =
wrote:
>=20
> Hi:
> =20
> Thanks for the review Jouni (as Int-Dir coordinator and document =
coauthor).
> =20
> Regarding the main issue and to extend Tomek=E2=80=99s comment =E2=80=A6=

> =20
> We actually have used this text, but without the MUST, in 3315bis (the =
updated version has not been published as the coauthors are still =
working through the remaining open issues from the approximately 300 =
that we captured during the 3315bis WGLC back in August). We do expect =
to publish an updated version before the IETF-98 deadline (hopefully =
with all issues addressed, but we=E2=80=99ll see).
> =20
> And, as Tomek explained, this idea here was to make this an OPTIONAL =
feature that vendors could implement (much like any new DHCP option) =E2=80=
=93 but if we left the text as a SHOULD or similar, vendors could claim =
they supported it without actually implementing it. Thus, this document =
has a MUST. And, it does not update =E2=80=93 but rather extends =E2=80=93=
 3315 and 1542.

Hmm.. I really do not like specification =E2=80=9Cgames=E2=80=9D like =
this. If you cannot justify a MUST into RFC3315bis, then trying to =
circumvent the fact in another document (that does not update the =
RFC3315 or RFC3315bis) should not be a Standards Track document. I could =
accept this as a BCP or a like.

- Jouni

>  o I would separate the new recommendation text for DHCPv4 and DHCPv6
> into their own respective section. Having just a one-liner statement
> "also applies to DHCPv4 [RFC1542].." is kind of confusing in a middle
> of very DHCPv6 specific text. I recon the DHCPv4 section would be
> short, but definitely more clear in that way.
> =20
> BV> I=E2=80=99ll discuss this with Yogendra =E2=80=A6 I think we can =
just make this clearer by either breaking out this applicability text =
for v4/v6 into separate paragraphs. I don=E2=80=99t think there really =
should be a need to duplicate the main material =E2=80=93 i.e., have =
separate sections which basically would be the same text on the IPsec =
items.
> =20
> o Although it should be obvious, but I would explicitly point it out
> in the Security Considerations that the security model here is
> hop-by-hop. If there are multiple relays then there will be multiple
> IPsec tunnels as well.
> =20
> BV> Sure, we can add that.
> =20
> o Section 14:  s/section 14,/Section 14,
> =20
> BV> OK, thanks for catching that.
> =20
> Again, thanks.
> =20
> -          Bernie
> =20
> From: Tomek Mrugalski [mailto:tomasz.mrugalski@gmail.com]=20
> Sent: Thursday, January 26, 2017 5:24 AM
> To: Jouni Korhonen <jounikor@gmail.com>; int-dir@ietf.org
> Cc: dhcwg@ietf.org; ietf@ietf.org; =
draft-ietf-dhc-relay-server-security.all@ietf.org
> Subject: Re: Review of draft-ietf-dhc-relay-server-security-02
> =20
> W dniu 26.01.2017 o 07:45, Jouni Korhonen pisze:
> Reviewer: Jouni Korhonen
> Review result: Not Ready
> =20
> Disclaimer: I have not followed recent DHC discussions to the extent
> that the existence this document was new to me.
> =20
> Issues:
> =20
> My issues with the document are the following. First, it actually
> updates a great deal of RFC3315 (Section 21.1) while there is
> RFC3315bis in progress. Why the DHCPv6 part of this document is not
> directly contributed to RFC3315bis work? There's even author overlap
> so there must be a good reason. Second, if there is a reason to keep
> the content of this document separate from RFC3315 body of work, at
> least this specification should then target to update RFC3315bis and
> not RFC3315.
> Hi Jouni,
> First of all, thanks for doing the review.
>=20
> I will leave it up to the authors to provide further details on this, =
but with my shepherd hat on, let me explain that this omission was made =
on purpose. The decision was made to not update 3315 and not bundle this =
into 3315bis on purpose. If we did that, then every DHCP server would =
HAVE to support IPSec. This would make implementation, certification and =
deployment much more complex and this is something we wanted to avoid. =
With the current approach, operators can be specific whether they need =
relay server security (by requiring their vendors to support both 3315 =
and this document) or not (just 3315).
>=20
> This is also explained in the write-up:
> (16) Will publication of this document change the status of any
> existing RFCs? Are those RFCs listed on the title page header, listed
> in the abstract, and discussed in the introduction? If the RFCs are =
not
> listed in the Abstract and Introduction, explain why, and point to the
> part of the document where the relationship of this document to the
> other RFCs is discussed. If this information is not in the document,
> explain why the WG considers it unnecessary.
> =20
>   No. Even though this I-D introduces changes to RFC3315, the WG =
doesn't
>   want to enforce IPsec encryption on every DHCPv6 server. Therefore
>   it does not update RFC3315.
>=20
>=20
> Also, I'd like to clarify that 3315bis is not a wildcard that bundles =
every RFC related to DHCPv6 ever published. This document is 133 pages =
long and that size causes difficulties moving the work forward. We're =
thinking what are the things we can take out of it, rather what else we =
could add. The previous argument still stands here. We want to have the =
core spec and an additional RFC that people can point to when they =
require secure server-relay communication.
>=20
> If that explanation is not acceptable for you, how do you propose to =
structure the text and possibly add updates 2131/3315 to achieve the =
goal or being a non-mandatory feature?
>=20
> I'll let the authors comment on the nits.
>=20
> Again, thanks for the review. It's good to receive one that shakes =
things up a bit once in a while :)
> Tomek
>=20
> Other smaller nits:
> =20
> o This document updates both RFC3315(bis) and RFC1542. Those are not
> reflected in the document title page and abstract.=20
> =20
> o I would separate the new recommendation text for DHCPv4 and DHCPv6
> into their own respective section. Having just a one-liner statement
> "also applies to DHCPv4 [RFC1542].." is kind of confusing in a middle
> of very DHCPv6 specific text. I recon the DHCPv4 section would be
> short, but definitely more clear in that way.
> =20
> o Although it should be obvious, but I would explicitly point it out
> in the Security Considerations that the security model here is
> hop-by-hop. If there are multiple relays then there will be multiple
> IPsec tunnels as well.
> =20
> o Section 14:  s/section 14,/Section 14,
> =20
> o=20
> =20
> =20
>=20
> _______________________________________________
> Int-dir mailing list
> Int-dir@ietf.org
> https://www.ietf.org/mailman/listinfo/int-dir


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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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On Jan 26, 2017, at 1:25 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
> Hmm.. I really do not like specification =E2=80=9Cgames=E2=80=9D like =
this. If you cannot justify a MUST into RFC3315bis, then trying to =
circumvent the fact in another document (that does not update the =
RFC3315 or RFC3315bis) should not be a Standards Track document. I could =
accept this as a BCP or a like.

Hm, then you are saying that every extension ever done to a protocol =
that, if it contains MUSTs, MUST update that protocol, even if =
implementations that support the extension can interoperate with =
implementations that do not and vice versa.   What's your basis for =
this?



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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">On Jan 26, 2017, at 1:25 PM, jouni.nospam &lt;<a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>&gt; wrote:<div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Menlo-Regular; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">Hmm.. I really do =
not like specification =E2=80=9Cgames=E2=80=9D like this. If you cannot =
justify a MUST into RFC3315bis, then trying to circumvent the fact in =
another document (that does not update the RFC3315 or RFC3315bis) should =
not be a Standards Track document. I could accept this as a BCP or a =
like.</span></div></blockquote><br class=3D""></div><div>Hm, then you =
are saying that every extension ever done to a protocol that, if it =
contains MUSTs, MUST update that protocol, even if implementations that =
support the extension can interoperate with implementations that do not =
and vice versa. &nbsp; What's your basis for this?</div><div><br =
class=3D""></div><br class=3D""></body></html>=

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References: <148541310715.6205.3276873953603821357.idtracker@ietfa.amsl.com> <ff898bc0-81ce-7598-c3f3-2e114d30df30@gmail.com> <e996599692ff4584b8ace30a36ea6881@XCH-ALN-003.cisco.com> <B3CE8C9D-C20C-4FAB-9054-0F09B2B87F63@gmail.com> <C099032E-F538-43AD-970F-F71A1A9E15D8@fugue.com>
To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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> On Jan 26, 2017, at 10:36 AM, Ted Lemon <mellon@fugue.com> wrote:
>=20
> On Jan 26, 2017, at 1:25 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
>> Hmm.. I really do not like specification =E2=80=9Cgames=E2=80=9D like =
this. If you cannot justify a MUST into RFC3315bis, then trying to =
circumvent the fact in another document (that does not update the =
RFC3315 or RFC3315bis) should not be a Standards Track document. I could =
accept this as a BCP or a like.
>=20
> Hm, then you are saying that every extension ever done to a protocol =
that, if it contains MUSTs, MUST update that protocol, even if =
implementations that support the extension can interoperate with =
implementations that do not and vice versa.   What=E2=80=99s your basis =
for this?

No. But in this case there are pieces of text that change specific =
places in the original document from SHOULDs to MUSTs, musts to MUSTs, =
and adds few pieces of new stuff, etc. Now how that in not updating? =
Changes or =E2=80=9Cextensions=E2=80=9D like that would be nice to =
follow from the base document.

- Jouni=


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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "jouni.nospam" <jouni.nospam@gmail.com>, Ted Lemon <mellon@fugue.com>
Thread-Topic: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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On Jan 26, 2017, at 1:58 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
> No. But in this case there are pieces of text that change specific =
places in the original document from SHOULDs to MUSTs, musts to MUSTs, =
and adds few pieces of new stuff, etc. Now how that in not updating? =
Changes or =E2=80=9Cextensions=E2=80=9D like that would be nice to =
follow from the base document.

Okay, I see your point.   But suppose the document were changed so that =
rather than "updating" the document as you suggest, it simply referenced =
the sections in question and then made the SHOULDs into MUSTs that way?  =
 Wouldn't that mean "implementations of this extension MUST," and =
wouldn't that be perfectly reasonable?


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">On Jan 26, 2017, at 1:58 PM, jouni.nospam &lt;<a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>&gt; wrote:<div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Menlo-Regular; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">No. But in this =
case there are pieces of text that change specific places in the =
original document from SHOULDs to MUSTs, musts to MUSTs, and adds few =
pieces of new stuff, etc. Now how that in not updating? Changes or =
=E2=80=9Cextensions=E2=80=9D like that would be nice to follow from the =
base document.</span></div></blockquote></div><br class=3D""><div =
class=3D"">Okay, I see your point. &nbsp; But suppose the document were =
changed so that rather than "updating" the document as you suggest, it =
simply referenced the sections in question and then made the SHOULDs =
into MUSTs that way? &nbsp; Wouldn't that mean "implementations of this =
extension MUST," and wouldn't that be perfectly reasonable?</div><div =
class=3D""><br class=3D""></div></body></html>=

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To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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> On Jan 26, 2017, at 11:27 AM, Ted Lemon <mellon@fugue.com> wrote:
>=20
> On Jan 26, 2017, at 1:58 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
>> No. But in this case there are pieces of text that change specific =
places in the original document from SHOULDs to MUSTs, musts to MUSTs, =
and adds few pieces of new stuff, etc. Now how that in not updating? =
Changes or =E2=80=9Cextensions=E2=80=9D like that would be nice to =
follow from the base document.
>=20
> Okay, I see your point.   But suppose the document were changed so =
that rather than "updating" the document as you suggest, it simply =
referenced the sections in question and then made the SHOULDs into MUSTs =
that way?   Wouldn't that mean "implementations of this extension MUST," =
and wouldn't that be perfectly reasonable?
>=20

I would still argue that it updates specifically if the document here is =
going to be standards track. If this document here would be more of a =
recommendation e.g., BCP I would be fine without the =E2=80=9Cupdating=E2=80=
=9D part (as I remember the MUST for IPsec in RFC3315bis was not =
endorsed by the WG).

- Jouni=


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From: Ted Lemon <mellon@fugue.com>
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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On Jan 27, 2017, at 3:20 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
> I would still argue that it updates specifically if the document here =
is going to be standards track. If this document here would be more of a =
recommendation e.g., BCP I would be fine without the =E2=80=9Cupdating=E2=80=
=9D part (as I remember the MUST for IPsec in RFC3315bis was not =
endorsed by the WG).

Ok, but it's not a BCP, it's a standard, with requirements for interop.  =
 So it can't be a BCP.

Given that it can't be a BCP, the other choices are "informational" and =
"experimental" and "updates the base spec."   You are saying that you =
want "updates the base spec," which would mean that everybody would have =
to implement it to conform to the new, updated spec.   But the argument =
has been made that this is not desirable: not everybody needs to =
implement this, and it is not desired that implementing this be a =
requirement.

So are you saying that you disagree with this=E2=80=94that you think it =
should be MTI?   Or are you saying that there is some other way to =
accomplish this goal?


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">On Jan 27, 2017, at 3:20 PM, jouni.nospam &lt;<a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>&gt; wrote:<div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Menlo-Regular; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">I would still argue =
that it updates specifically if the document here is going to be =
standards track. If this document here would be more of a recommendation =
e.g., BCP I would be fine without the =E2=80=9Cupdating=E2=80=9D part =
(as I remember the MUST for IPsec in RFC3315bis was not endorsed by the =
WG).</span></div></blockquote></div><br class=3D""><div class=3D"">Ok, =
but it's not a BCP, it's a standard, with requirements for interop. =
&nbsp; So it can't be a BCP.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Given that it can't be a BCP, the other =
choices are "informational" and "experimental" and "updates the base =
spec." &nbsp; You are saying that you want "updates the base spec," =
which would mean that everybody would have to implement it to conform to =
the new, updated spec. &nbsp; But the argument has been made that this =
is not desirable: not everybody needs to implement this, and it is not =
desired that implementing this be a requirement.</div><div class=3D""><br =
class=3D""></div><div class=3D"">So are you saying that you disagree =
with this=E2=80=94that you think it should be MTI? &nbsp; Or are you =
saying that there is some other way to accomplish this goal?</div><div =
class=3D""><br class=3D""></div></body></html>=

--Apple-Mail=_C986E285-A393-455B-8E37-D224B64E4EA5--


From nobody Sun Jan 29 01:02:52 2017
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Cc: dhcwg@ietf.org, ietf@ietf.org, draft-ietf-dhc-dhcpv6-prefix-length-hint-issue.all@ietf.org
Subject: [dhcwg] Review of draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05
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Reviewer: Roni Even
Review result: Almost Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05
Reviewer: Roni Even
Review Date: 2017-01-29
IETF LC End Date: 2017-02-09
IESG Telechat date: 2017-02-16

Summary: This draft is almost ready for publication as a standard
track RFC.


Major issues:

Minor issues:

1.	I think that this document updates RFC3633 and it should be
mentioned in the title and abstract
2.	In section 3.1 reference RFC3315 for solicit message and 3.3 for
advertise messge
3.	In section 3.1 solution last paragraph is the order of the two
IAPREFIX options important?
4.	In section 3.2 solution why are you suing SHOULD and not MUST in
all recommendations?
5.	In section 3.2 solution, what should the server do if cannot
provide any of the requests
6.	In section 3.2 solution last paragraph “SHOULD try to provide” and
in the first paragraph “SHOULD provide” should be the same in both.
7.	In section 3.4 “If the client decided to use  the prefix provided
by the server despite being longer than the  prefix-length hint” yet I
did not see in section 3.2 that the server can provide a longer
prefix.
8.	In section 3.5 solution the document use “as close as possible” and
section 3.2 only talk about smaller.
9.     In section 3.5 solution why offer options 3 and 4. The draft
says that option 3 will break client connections and 4 talks about “a 
short non-zero valid-lifetime” which may cause the  client to lose
connection if "too short for the client" since “short” is not an exact
value


Nits/editorial comments:




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To: Ted Lemon <mellon@fugue.com>
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Cc: "ietf@ietf.org" <ietf@ietf.org>, "int-dir@ietf.org" <int-dir@ietf.org>, Jouni Korhonen <jounikor@gmail.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>, "draft-ietf-dhc-relay-server-security.all@ietf.org" <draft-ietf-dhc-relay-server-security.all@ietf.org>, "Bernie Volz \(volz\)" <volz@cisco.com>
Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Ted,

> On Jan 27, 2017, at 1:25 PM, Ted Lemon <mellon@fugue.com> wrote:
>=20
> On Jan 27, 2017, at 3:20 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
>> I would still argue that it updates specifically if the document here =
is going to be standards track. If this document here would be more of a =
recommendation e.g., BCP I would be fine without the =E2=80=9Cupdating=E2=80=
=9D part (as I remember the MUST for IPsec in RFC3315bis was not =
endorsed by the WG).
>=20
> Ok, but it's not a BCP, it's a standard, with requirements for =
interop.   So it can't be a BCP.
>=20
> Given that it can't be a BCP, the other choices are "informational" =
and "experimental" and "updates the base spec."   You are saying that =
you want "updates the base spec," which would mean that everybody would =
have to implement it to conform to the new, updated spec.   But the =
argument has been made that this is not desirable: not everybody needs =
to implement this, and it is not desired that implementing this be a =
requirement.

The main differences in relay-server-security compared to rfc3315bis =
are:
1) the addition of mandatory to implement encryption and authentication =
algorithms
2) removal of IKEv1
3) removal of the availability statement
4) mixing IPv4 there as well

Otherwise it is mainly about capitalizing rfc2119 keywords (well one =
should changes to MUST, and one =E2=80=99use=E2=80=99 is preceded with a =
MUST).

Now if I decide to implement rfc3315bis *with* security, follow all =
musts in Section 20.1, and listed =E2=80=9Cupdates=E2=80=9D in the =
header, I have still no guarantee whether I can interoperate with =
another rfc3315bis implementation because it decided to follow =
relay-server-security. That is not good.

> So are you saying that you disagree with this=E2=80=94that you think =
it should be MTI?   Or are you saying that there is some other way to =
accomplish this goal?

I am saying.. the intention of relay-server-security is good and I =
support it. The way it is done is IMHO not good. What I would do is to =
fix Section 20.1 in rfc3315bis with proper rfc2119 keywords and missing =
pieces (like the algorithms), but still keeping the implementation of =
20.1 optional as it is now. Then I would do (i.e., =
relay-server-security) as a BCP saying =E2=80=9Cimplementation of the =
security in rfc3315bis as defined in Section 20.1 is REQUIRED and MUST =
use the following profile..=E2=80=9D. This can be worded to cover both =
DHCPv4 and DHCPv6.

- Jouni


From nobody Mon Jan 30 14:54:47 2017
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From: Ted Lemon <mellon@fugue.com>
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Cc: "ietf@ietf.org" <ietf@ietf.org>, "int-dir@ietf.org" <int-dir@ietf.org>, Jouni Korhonen <jounikor@gmail.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>, "draft-ietf-dhc-relay-server-security.all@ietf.org" <draft-ietf-dhc-relay-server-security.all@ietf.org>, "Bernie Volz \(volz\)" <volz@cisco.com>
Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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On Jan 30, 2017, at 5:20 PM, jouni.nospam <jouni.nospam@gmail.com> =
wrote:
> Now if I decide to implement rfc3315bis *with* security, follow all =
musts in Section 20.1, and listed =E2=80=9Cupdates=E2=80=9D in the =
header, I have still no guarantee whether I can interoperate with =
another rfc3315bis implementation because it decided to follow =
relay-server-security. That is not good.

Thanks.   This is the clarification I was looking for.


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">On Jan 30, 2017, at 5:20 PM, jouni.nospam &lt;<a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>&gt; wrote:<div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Menlo-Regular; font-size: 14px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">Now if I decide to =
implement rfc3315bis *with* security, follow all musts in Section 20.1, =
and listed =E2=80=9Cupdates=E2=80=9D in the header, I have still no =
guarantee whether I can interoperate with another rfc3315bis =
implementation because it decided to follow relay-server-security. That =
is not good.</span></div></blockquote></div><br class=3D""><div =
class=3D"">Thanks. &nbsp; This is the clarification I was looking =
for.</div><div class=3D""><br class=3D""></div></body></html>=

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Ted Lemon <mellon@fugue.com>, "jouni.nospam" <jouni.nospam@gmail.com>
Thread-Topic: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Date: Mon, 30 Jan 2017 23:08:59 +0000
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From: tianxiang li <peter416733@gmail.com>
Date: Tue, 31 Jan 2017 23:58:50 +0800
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Subject: Re: [dhcwg] Review of draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05
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Dear Roni,

Thank you for providing a thorough review of this document.

I have a few questions regarding the comments, please see inline.

Best regards,
Tianxiang

2017-01-29 17:02 GMT+08:00 Roni Even <roni.even@mail01.huawei.com>:

> Reviewer: Roni Even
> Review result: Almost Ready
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
>
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-dhc-dhcpv6-prefix-length-hint-issue-05
> Reviewer: Roni Even
> Review Date: 2017-01-29
> IETF LC End Date: 2017-02-09
> IESG Telechat date: 2017-02-16
>
> Summary: This draft is almost ready for publication as a standard
> track RFC.
>
>
> Major issues:
>
> Minor issues:
>
> 1.      I think that this document updates RFC3633 and it should be
> mentioned in the title and abstract
>

[Tianxiang] This document does not change any of the text in RFC 3633, but
specifies the client and server behavior when using the "prefix-length
hint", which was not explained in RFC3633. Would it be suitable to state
"this document updates RFC3633"?


> 2.      In section 3.1 reference RFC3315 for solicit message and 3.3 for
> advertise messge


[Tianxiang] Okay, we'll add reference to RFC3315 in section 3.1 and 3.3
when mentioning Solicit and Advertise messgae.


> 3.      In section 3.1 solution last paragraph is the order of the two
> IAPREFIX options important?
>

[Tianxiang] There is no strict requirement for the order of the two
options. Would you prefer if we added a sentence to specify this?


> 4.      In section 3.2 solution why are you suing SHOULD and not MUST in
> all recommendations?
>

[Tianxiang] In this document, we used "MUST" for some of the client
behaviors, as they are mandatory to avoid client failure and necessary if
the client wanted to express its prefix-length requirement.

For server behavior, we used "SHOULD" because this document specifies the
desired server behavior if the server wants to consider the prefix-length
hint, but the server could have its own behavioral policy (e.g. neglect the
prefix-length hint).


> 5.      In section 3.2 solution, what should the server do if cannot
> provide any of the requests
>

[Tianxiang] If the server could not provide the requested prefix or
prefix-length, it should provide a prefix closest to the prefix-length
hint, as stated in the last sentence of section 3.2.

Are you referring to what the sever should do of it simply could not
provide ANY prefixes to the client? In that case, we could add a sentence
at the end of the section 3.2:

"If the server will not assign any prefixes to any IA_PDs in a subsequent
Request from the client, the server MUST send an Advertise message to the
client as described in section 11.2 of RFC 3633."


> 6.      In section 3.2 solution last paragraph =E2=80=9CSHOULD try to pro=
vide=E2=80=9D and
> in the first paragraph =E2=80=9CSHOULD provide=E2=80=9D should be the sam=
e in both.
>

[Tianxiang] Thanks for pointing that out, we'll change it to "SHOULD
provide".


> 7.      In section 3.4 =E2=80=9CIf the client decided to use  the prefix =
provided
> by the server despite being longer than the  prefix-length hint=E2=80=9D =
yet I
> did not see in section 3.2 that the server can provide a longer
> prefix.
>

[Tianxiang] This was mentioned in the last sentence of section 3.2:

"If the requested prefix is not available in the server's prefix pool, and
the client also included a prefix-length hint in the same IA_PD option,
then the server SHOULD try to provide a prefix matching the prefix-length
value, or the prefix with the shortest length possible which is closest to
the prefix-length hint value."


> 8.      In section 3.5 solution the document use =E2=80=9Cas close as pos=
sible=E2=80=9D and
> section 3.2 only talk about smaller.
>

[Tianxiang] This was mentioned in the last sentence of section 3.2.


> 9.     In section 3.5 solution why offer options 3 and 4. The draft
> says that option 3 will break client connections and 4 talks about =E2=80=
=9Ca
> short non-zero valid-lifetime=E2=80=9D which may cause the  client to los=
e
> connection if "too short for the client" since =E2=80=9Cshort=E2=80=9D is=
 not an exact
> value
>

[Tianxiang] The idea was to list all the options, and discuss their
consequences. And the server could decide which option to use depending on
its policy.

Option 3 avoids the complexity of handling multiple delegated prefixes,
despite of breaking up all connections. Option 4 allows to server to
configure a valid-lifetime for the old prefix depending on actual
requirements, rather than let the old prefix expire on its own.


>
> Nits/editorial comments:
>
>
>
>

--001a113d101873e6e30547660466
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear Roni,<div><br></div><div>Thank you for providing a th=
orough review of this document.</div><div><br></div><div>I have a few quest=
ions regarding the comments, please see inline.</div><div><br></div><div>Be=
st regards,</div><div>Tianxiang</div><div class=3D"gmail_extra"><br><div cl=
ass=3D"gmail_quote">2017-01-29 17:02 GMT+08:00 Roni Even <span dir=3D"ltr">=
&lt;<a href=3D"mailto:roni.even@mail01.huawei.com" target=3D"_blank">roni.e=
ven@mail01.huawei.com</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex">Reviewer: Roni Even<br>
Review result: Almost Ready<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-dhc-dhcpv6-prefix-l<wbr>ength-hint-issue-05<br>
Reviewer: Roni Even<br>
Review Date: 2017-01-29<br>
IETF LC End Date: 2017-02-09<br>
IESG Telechat date: 2017-02-16<br>
<br>
Summary: This draft is almost ready for publication as a standard<br>
track RFC.<br>
<br>
<br>
Major issues:<br>
<br>
Minor issues:<br>
<br>
1.=C2=A0 =C2=A0 =C2=A0 I think that this document updates RFC3633 and it sh=
ould be<br>
mentioned in the title and abstract<br></blockquote><div><br></div><div>[Ti=
anxiang] This document does not change any of the text in RFC 3633, but spe=
cifies the client and server behavior when using the &quot;prefix-length hi=
nt&quot;, which was not explained in RFC3633. Would it be suitable to state=
 &quot;this document updates RFC3633&quot;?</div><div>=C2=A0</div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">
2.=C2=A0 =C2=A0 =C2=A0 In section 3.1 reference RFC3315 for solicit message=
 and 3.3 for<br>
advertise messge=C2=A0</blockquote><div>=C2=A0</div><div>[Tianxiang] Okay, =
we&#39;ll add reference to RFC3315 in section 3.1 and 3.3 when mentioning S=
olicit and Advertise messgae.</div><div>=C2=A0=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
3.=C2=A0 =C2=A0 =C2=A0 In section 3.1 solution last paragraph is the order =
of the two<br>
IAPREFIX options important?<br></blockquote><div><br></div><div>[Tianxiang]=
 There is no strict requirement for the order of the two options. Would you=
 prefer if we added a sentence to specify this?</div><div>=C2=A0</div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">
4.=C2=A0 =C2=A0 =C2=A0 In section 3.2 solution why are you suing SHOULD and=
 not MUST in<br>
all recommendations?<br></blockquote><div><br></div><div>[Tianxiang] In thi=
s document, we used &quot;MUST&quot; for some of the client behaviors, as t=
hey are mandatory to avoid client failure and necessary if the client wante=
d to express its prefix-length requirement.=C2=A0</div><div><br></div><div>=
For server behavior, we used &quot;SHOULD&quot; because this document speci=
fies the desired server behavior if the server wants to consider the prefix=
-length hint, but the server could have its own behavioral policy (e.g. neg=
lect the prefix-length hint).</div><div>=C2=A0</div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">
5.=C2=A0 =C2=A0 =C2=A0 In section 3.2 solution, what should the server do i=
f cannot<br>
provide any of the requests<br></blockquote><div><br></div><div>[Tianxiang]=
 If the server could not provide the requested prefix or prefix-length, it =
should provide a prefix closest to the prefix-length hint, as stated in the=
 last sentence of section 3.2.</div><div><br></div><div>Are you referring t=
o what the sever should do of it simply could not provide ANY prefixes to t=
he client? In that case, we could add a sentence at the end of the section =
3.2:</div><div><br></div><div>&quot;If the server will not assign any prefi=
xes to any IA_PDs in a subsequent Request from the client, the server MUST =
send an Advertise message to the client as described in section 11.2 of RFC=
 3633.&quot;<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">
6.=C2=A0 =C2=A0 =C2=A0 In section 3.2 solution last paragraph =E2=80=9CSHOU=
LD try to provide=E2=80=9D and<br>
in the first paragraph =E2=80=9CSHOULD provide=E2=80=9D should be the same =
in both.<br></blockquote><div><br></div><div>[Tianxiang] Thanks for pointin=
g that out, we&#39;ll change it to &quot;SHOULD provide&quot;.</div><div>=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
7.=C2=A0 =C2=A0 =C2=A0 In section 3.4 =E2=80=9CIf the client decided to use=
=C2=A0 the prefix provided<br>
by the server despite being longer than the=C2=A0 prefix-length hint=E2=80=
=9D yet I<br>
did not see in section 3.2 that the server can provide a longer<br>
prefix.<br></blockquote><div><br></div><div>[Tianxiang] This was mentioned =
in the last sentence of section 3.2:=C2=A0</div><div><br></div><div>&quot;I=
f the requested prefix is not available in the server&#39;s prefix pool, an=
d the client also included a prefix-length hint in the same IA_PD option, t=
hen the server SHOULD try to provide a prefix matching the prefix-length va=
lue, or the prefix with the shortest length possible which is closest to th=
e prefix-length hint value.&quot;</div><div>=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
8.=C2=A0 =C2=A0 =C2=A0 In section 3.5 solution the document use =E2=80=9Cas=
 close as possible=E2=80=9D and<br>
section 3.2 only talk about smaller.<br></blockquote><div><br></div><div>[T=
ianxiang] This was mentioned in the last sentence of section 3.2.=C2=A0</di=
v><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
9.=C2=A0 =C2=A0 =C2=A0In section 3.5 solution why offer options 3 and 4. Th=
e draft<br>
says that option 3 will break client connections and 4 talks about =E2=80=
=9Ca<br>
short non-zero valid-lifetime=E2=80=9D which may cause the=C2=A0 client to =
lose<br>
connection if &quot;too short for the client&quot; since =E2=80=9Cshort=E2=
=80=9D is not an exact<br>
value=C2=A0<br></blockquote><div><br></div><div>[Tianxiang] The idea was to=
 list all the options, and discuss their consequences. And the server could=
 decide which option to use depending on its policy.=C2=A0</div><div><br></=
div><div>Option 3 avoids the complexity of handling multiple delegated pref=
ixes, despite of breaking up all connections. Option 4 allows to server to =
configure a valid-lifetime for the old prefix depending on actual requireme=
nts, rather than let the old prefix expire on its own.=C2=A0</div><div><br>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
Nits/editorial comments:<br>
<br>
<br>
<br>
</blockquote></div><br></div></div>

--001a113d101873e6e30547660466--


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From: "Yogendra Pal (yogpal)" <yogpal@cisco.com>
To: "Bernie Volz (volz)" <volz@cisco.com>, Ted Lemon <mellon@fugue.com>, "jouni.nospam" <jouni.nospam@gmail.com>
Thread-Topic: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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Date: Tue, 31 Jan 2017 18:38:21 +0000
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Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-security-02
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--_000_D4B6CD1221668yogpalciscocom_
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With full due respect of conversation, I see Bernie's point, towards flexib=
ility. For e.g: We see two operators primary wherein, device operator would=
 like to have base RFC3315 supported for n/w and security operator asking f=
or security in n/w via RFC9999.

Regards, Yogendra Pal
From: "Bernie Volz (volz)" <volz@cisco.com<mailto:volz@cisco.com>>
Date: Tuesday, 31 January 2017 4:38 am
To: Ted Lemon <mellon@fugue.com<mailto:mellon@fugue.com>>, "jouni.nospam" <=
jouni.nospam@gmail.com<mailto:jouni.nospam@gmail.com>>
Cc: Tomek Mrugalski <tomasz.mrugalski@gmail.com<mailto:tomasz.mrugalski@gma=
il.com>>, "dhcwg@ietf.org<mailto:dhcwg@ietf.org>" <dhcwg@ietf.org<mailto:dh=
cwg@ietf.org>>, "draft-ietf-dhc-relay-server-security.all@ietf.org<mailto:d=
raft-ietf-dhc-relay-server-security.all@ietf.org>" <draft-ietf-dhc-relay-se=
rver-security.all@ietf.org<mailto:draft-ietf-dhc-relay-server-security.all@=
ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:iet=
f@ietf.org>>, Jouni Korhonen <jounikor@gmail.com<mailto:jounikor@gmail.com>=
>, "int-dir@ietf.org<mailto:int-dir@ietf.org>" <int-dir@ietf.org<mailto:int=
-dir@ietf.org>>
Subject: RE: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-securi=
ty-02
Resent-From: <alias-bounces@ietf.org<mailto:alias-bounces@ietf.org>>
Resent-To: <volz@cisco.com<mailto:volz@cisco.com>>, Yogendra Pal <yogpal@ci=
sco.com<mailto:yogpal@cisco.com>>, <tomasz.mrugalski@gmail.com<mailto:tomas=
z.mrugalski@gmail.com>>, <suresh.krishnan@ericsson.com<mailto:suresh.krishn=
an@ericsson.com>>, <terry.manderson@icann.org<mailto:terry.manderson@icann.=
org>>, Tomek Mrugalski <tomasz.mrugalski@gmail.com<mailto:tomasz.mrugalski@=
gmail.com>>
Resent-Date: Tuesday, 31 January 2017 4:39 am

Hi:

Let's take the 3315bis out of the discussion as we don't yet know when that=
 will be available and we'd like to progress on this draft sooner than that=
 (as it is shorter and easier to do). We can get back to it later, but let'=
s focus first on today's issue with is the document with RFC 3315.

So if this is released as RFC9999, the only way you as someone looking for =
relay or server implementations (or both) could know that this is supported=
 is by asking the supplier whether they support RFC3315 and RFC9999. RFC999=
9 does not have up update 3315. This is just like many of the other DHCP RF=
Cs which extend the functionality - Leasequery, bulk Leasequery, active Lea=
sequery, and the many options documents. If you want certain features and t=
hey are in other documents, you have to specify the complete list.

Saying it updates RFC3315 doesn't help since there are plenty of existing i=
mplementations that don't support IPsec.



Back to RFC 3315 bis (draft-ietf-dhc-rfc3315bis), that is still a work in p=
rogress. Our plans to date are that we'll incorporate all of the changes of=
 draft-ietf-dhc-relay-server-security but leave it OPTIONAL to implement IP=
sec. This means that once draft-ietf-dhc-rfc3315bis is published as an RFC,=
 those that want IPsec will have to check that the implementation supports =
both the bis RFC and RFC9999 (or whatever number). But that's the same that=
 someone wanting Leasequery must do - they'll need to check that the bis RF=
C and RFC5007 are supported.

The draft-ietf-dhc-rfc3315bis and/or draft-ietf-dhc-relay-server-security a=
uthors can always raise it to the DHC WG to see if there is sufficient cons=
ensus to make IPsec a MUST in the bis document. But there hasn't been in th=
e past.


-          Bernie

From: Ted Lemon [mailto:mellon@fugue.com]
Sent: Monday, January 30, 2017 5:54 PM
To: jouni.nospam <jouni.nospam@gmail.com<mailto:jouni.nospam@gmail.com>>
Cc: Bernie Volz (volz) <volz@cisco.com<mailto:volz@cisco.com>>; Tomek Mruga=
lski <tomasz.mrugalski@gmail.com<mailto:tomasz.mrugalski@gmail.com>>; dhcwg=
@ietf.org<mailto:dhcwg@ietf.org>; draft-ietf-dhc-relay-server-security.all@=
ietf.org<mailto:draft-ietf-dhc-relay-server-security.all@ietf.org>; ietf@ie=
tf.org<mailto:ietf@ietf.org>; Jouni Korhonen <jounikor@gmail.com<mailto:jou=
nikor@gmail.com>>; int-dir@ietf.org<mailto:int-dir@ietf.org>
Subject: Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server-securi=
ty-02

On Jan 30, 2017, at 5:20 PM, jouni.nospam <jouni.nospam@gmail.com<mailto:jo=
uni.nospam@gmail.com>> wrote:
Now if I decide to implement rfc3315bis *with* security, follow all musts i=
n Section 20.1, and listed "updates" in the header, I have still no guarant=
ee whether I can interoperate with another rfc3315bis implementation becaus=
e it decided to follow relay-server-security. That is not good.

Thanks.   This is the clarification I was looking for.


--_000_D4B6CD1221668yogpalciscocom_
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</head>
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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>With full due respect of conversation, I see Bernie&#8217;s point, tow=
ards flexibility. For e.g: We see two operators primary wherein, device ope=
rator would like to have base RFC3315 supported for n/w and security operat=
or asking for security in n/w via RFC9999.</div>
<div><br>
</div>
<div>Regards, Yogendra Pal</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
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 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Bernie Volz (volz)&quot=
; &lt;<a href=3D"mailto:volz@cisco.com">volz@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Tuesday, 31 January 2017 4:38=
 am<br>
<span style=3D"font-weight:bold">To: </span>Ted Lemon &lt;<a href=3D"mailto=
:mellon@fugue.com">mellon@fugue.com</a>&gt;, &quot;jouni.nospam&quot; &lt;<=
a href=3D"mailto:jouni.nospam@gmail.com">jouni.nospam@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Tomek Mrugalski &lt;<a href=3D"=
mailto:tomasz.mrugalski@gmail.com">tomasz.mrugalski@gmail.com</a>&gt;, &quo=
t;<a href=3D"mailto:dhcwg@ietf.org">dhcwg@ietf.org</a>&quot; &lt;<a href=3D=
"mailto:dhcwg@ietf.org">dhcwg@ietf.org</a>&gt;, &quot;<a href=3D"mailto:dra=
ft-ietf-dhc-relay-server-security.all@ietf.org">draft-ietf-dhc-relay-server=
-security.all@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-dhc-relay-server-security.all@ietf.org">d=
raft-ietf-dhc-relay-server-security.all@ietf.org</a>&gt;, &quot;<a href=3D"=
mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=3D"mailto:ietf@ie=
tf.org">ietf@ietf.org</a>&gt;, Jouni Korhonen &lt;<a href=3D"mailto:jouniko=
r@gmail.com">jounikor@gmail.com</a>&gt;,
 &quot;<a href=3D"mailto:int-dir@ietf.org">int-dir@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:int-dir@ietf.org">int-dir@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>RE: [dhcwg] [Int-dir] Revi=
ew of draft-ietf-dhc-relay-server-security-02<br>
<span style=3D"font-weight:bold">Resent-From: </span>&lt;<a href=3D"mailto:=
alias-bounces@ietf.org">alias-bounces@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Resent-To: </span>&lt;<a href=3D"mailto:vo=
lz@cisco.com">volz@cisco.com</a>&gt;, Yogendra Pal &lt;<a href=3D"mailto:yo=
gpal@cisco.com">yogpal@cisco.com</a>&gt;, &lt;<a href=3D"mailto:tomasz.mrug=
alski@gmail.com">tomasz.mrugalski@gmail.com</a>&gt;, &lt;<a href=3D"mailto:=
suresh.krishnan@ericsson.com">suresh.krishnan@ericsson.com</a>&gt;,
 &lt;<a href=3D"mailto:terry.manderson@icann.org">terry.manderson@icann.org=
</a>&gt;, Tomek Mrugalski &lt;<a href=3D"mailto:tomasz.mrugalski@gmail.com"=
>tomasz.mrugalski@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Resent-Date: </span>Tuesday, 31 January 20=
17 4:39 am<br>
</div>
<div><br>
</div>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Hi:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Let's take the 3315bis out of the d=
iscussion as we don't yet know when that will be available and we'd like to=
 progress on this draft sooner than
 that (as it is shorter and easier to do). We can get back to it later, but=
 let&#8217;s focus first on today&#8217;s issue with is the document with R=
FC 3315.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">So if this is released as RFC9999, =
the only way you as someone looking for relay or server implementations (or=
 both) could know that this is supported
 is by asking the supplier whether they support RFC3315 and RFC9999. RFC999=
9 does not have up update 3315. This is just like many of the other DHCP RF=
Cs which extend the functionality &#8211; Leasequery, bulk Leasequery, acti=
ve Leasequery, and the many options documents.
 If you want certain features and they are in other documents, you have to =
specify the complete list.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Saying it updates RFC3315 doesn&#82=
17;t help since there are plenty of existing implementations that don&#8217=
;t support IPsec.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Back to RFC 3315 bis (draft-ietf-dh=
c-rfc3315bis), that is still a work in progress. Our plans to date are that=
 we&#8217;ll incorporate all of the changes
 of draft-ietf-dhc-relay-server-security but leave it OPTIONAL to implement=
 IPsec. This means that once draft-ietf-dhc-rfc3315bis is published as an R=
FC, those that want IPsec will have to check that the implementation suppor=
ts both the bis RFC and RFC9999
 (or whatever number). But that&#8217;s the same that someone wanting Lease=
query must do &#8211; they&#8217;ll need to check that the bis RFC and RFC5=
007 are supported.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">The draft-ietf-dhc-rfc3315bis and/o=
r draft-ietf-dhc-relay-server-security authors can always raise it to the D=
HC WG to see if there is sufficient
 consensus to make IPsec a MUST in the bis document. But there hasn&#8217;t=
 been in the past.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><!--[if !supportLists]--><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:#1F497D"><span style=3D"mso-list:Ign=
ore">-<span style=3D"font-style: normal; font-variant: normal; font-weight:=
 normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman=
';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-size: 11pt; font-fam=
ily: Calibri, sans-serif; color: rgb(31, 73, 125);">Bernie<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif;">From:</span></b><span style=3D"font-size: 11pt; font-fami=
ly: Calibri, sans-serif;"> Ted Lemon [<a href=3D"mailto:mellon@fugue.com">m=
ailto:mellon@fugue.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 5:54 PM<br>
<b>To:</b> jouni.nospam &lt;<a href=3D"mailto:jouni.nospam@gmail.com">jouni=
.nospam@gmail.com</a>&gt;<br>
<b>Cc:</b> Bernie Volz (volz) &lt;<a href=3D"mailto:volz@cisco.com">volz@ci=
sco.com</a>&gt;; Tomek Mrugalski &lt;<a href=3D"mailto:tomasz.mrugalski@gma=
il.com">tomasz.mrugalski@gmail.com</a>&gt;;
<a href=3D"mailto:dhcwg@ietf.org">dhcwg@ietf.org</a>; <a href=3D"mailto:dra=
ft-ietf-dhc-relay-server-security.all@ietf.org">
draft-ietf-dhc-relay-server-security.all@ietf.org</a>; <a href=3D"mailto:ie=
tf@ietf.org">
ietf@ietf.org</a>; Jouni Korhonen &lt;<a href=3D"mailto:jounikor@gmail.com"=
>jounikor@gmail.com</a>&gt;;
<a href=3D"mailto:int-dir@ietf.org">int-dir@ietf.org</a><br>
<b>Subject:</b> Re: [dhcwg] [Int-dir] Review of draft-ietf-dhc-relay-server=
-security-02<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">On Jan 30, 2017, at 5:20 PM, jouni.nospam &lt;<a hre=
f=3D"mailto:jouni.nospam@gmail.com">jouni.nospam@gmail.com</a>&gt; wrote:<o=
:p></o:p></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Menlo=
-Regular, serif;">Now if I decide to implement rfc3315bis *with* security, =
follow all musts in Section 20.1, and listed &#8220;updates&#8221; in the h=
eader, I have still no guarantee whether I can interoperate
 with another rfc3315bis implementation because it decided to follow relay-=
server-security. That is not good.</span><o:p></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal">Thanks. &nbsp; This is the clarification I was looki=
ng for.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</div>
</span>
</body>
</html>

--_000_D4B6CD1221668yogpalciscocom_--


From nobody Tue Jan 31 11:14:13 2017
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Subject: [dhcwg] Kathleen Moriarty's No Objection on draft-ietf-dhc-dhcpv6-failover-protocol-04: (with COMMENT)
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Kathleen Moriarty has entered the following ballot position for
draft-ietf-dhc-dhcpv6-failover-protocol-04: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
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for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-failover-protocol/



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

I have 2 questions that I would like to chat about and should be easy
enough to resolve.

1. I know we've discussed in the past why there is no MUST for TLS and it
having to do with DHCPv6 use on private networks or isolated.  Is there
text in one of the more recent RFCs that covers this explanation that can
be cited?  I'd like to make sure that's enough too.

2. The Security Considerations section says not to use Authentication
from RFC3316.  SHould authentication instead be done within TLS or how
will the session be authenticated.  Did I miss something?  I'm not
finding the term authentication elsewhere in the draft and can infer
things, but wanted to make sure since nothing is stated explicitly.



From nobody Tue Jan 31 13:46:25 2017
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Subject: Re: [dhcwg] Kathleen Moriarty's No Objection on draft-ietf-dhc-dhcpv6-failover-protocol-04: (with COMMENT)
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Kathleen,

Thanks for your comments.  My responses are indented below.

> On Jan 31, 2017, at 2:14 PM, Kathleen Moriarty =
<Kathleen.Moriarty.ietf@gmail.com> wrote:
>=20
> Kathleen Moriarty has entered the following ballot position for
> draft-ietf-dhc-dhcpv6-failover-protocol-04: No Objection
>=20
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut =
this
> introductory paragraph, however.)
>=20
>=20
> Please refer to =
https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>=20
>=20
> The document, along with other ballot positions, can be found here:
> =
https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-failover-protocol/
>=20
>=20
>=20
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>=20
> I have 2 questions that I would like to chat about and should be easy
> enough to resolve.
>=20
> 1. I know we've discussed in the past why there is no MUST for TLS and =
it
> having to do with DHCPv6 use on private networks or isolated.  Is =
there
> text in one of the more recent RFCs that covers this explanation that =
can
> be cited?  I'd like to make sure that's enough too.

	To the best of my knowledge the justifications for both a secure
	and an insecure mode have been kept out of the RFC's themselves,
	and are scattered over a variety of issues raised for different
	drafts.  A pretty succinct summary came from you for the DHCPv4
	Active Leasequery draft (the bottom of this page):

	https://datatracker.ietf.org/doc/rfc7724/ballot/ =
<https://datatracker.ietf.org/doc/rfc7724/ballot/>

	I can go back to the email surrounding the DHCPv6 Active =
Leasequery
	draft and try to pull that together into something longer, but
	essentially it is going to say pretty much what you have =
summarized
	at the above URL.
>=20
> 2. The Security Considerations section says not to use Authentication
> from RFC3316.  SHould authentication instead be done within TLS or how
> will the session be authenticated.  Did I miss something?  I'm not
> finding the term authentication elsewhere in the draft and can infer
> things, but wanted to make sure since nothing is stated explicitly.
>=20

	Interesting point.  Yes, if you care about authentication you
	should use TLS.  And the discussion on authentication in TLS
	is in Section 9.1 of the DHCPv6 Active Leasequery draft, RFC
	7653.  That section is not otherwise referenced here in the
	failover draft.  I will add the following to the end of the
	Security Considerations section, immediately after:

>>    Authentication for DHCPv6 messages [RFC3315 =
<https://tools.ietf.org/html/rfc3315>] MUST NOT be used to
>>    attempt to secure transmission of the messages described in this
>>    document.

=09
	"If authentication is desired, TLS SHOULD be employed
	as described in Sections 8.2 and 9.1 of [RFC7653] =
<https://tools.ietf.org/html/rfc7653#section-8.2>."

	Thanks for catching this!

	Regards -- Kim






From nobody Tue Jan 31 15:30:24 2017
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Subject: [dhcwg] Ben Campbell's Discuss on draft-ietf-dhc-dhcpv6-failover-protocol-04: (with DISCUSS and COMMENT)
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Ben Campbell has entered the following ballot position for
draft-ietf-dhc-dhcpv6-failover-protocol-04: Discuss

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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

I think the security considerations need some elaboration. The draft says
"When operating in secure mode...", but it doesn't discuss when one might
want to run in secure more vs non-secure mode. It would be helpful to
discuss actual threats. You mention TCP DoS attacks, but, for example,
can an eavesdropper learn sensitive or private information? Is there a
risk of someone impersonating a partner? Tampering with messages on the
network?

There's a mention of using TLS certs for authentication/authorization,
but I think there's more to be said there. Is there any authentication or
authorization if you aren't using secure mode? How do you match a TLS
certificate to the partner name?

The section opens saying that the security considerations from 3315 and
3633 apply, but I doubt either of those contemplated that you would be
sending DHCP messages over TCP connections between partner servers.


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

- 6.1.3: I'm confused by the procedure for checking
OPTION_F_PROTOCOL_VERSION in the CONNECTREPLY message. The secondary
already checked that it supported the version in the CONNECT message; why
does the primary need to check it again? Is it expected that the
secondary might choose to send a different version in the CONNECTREPLY
than it received in CONNECT? Is it possible that the partners use
different protocol versions at the same time?



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