Re: [6lowpan] Ready for WGLC? (Re: Latest version of IPv6 over BT-LE draft)

<minjun.xi@nokia.com> Thu, 22 September 2011 13:53 UTC

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From: <minjun.xi@nokia.com>
To: <esko.dijk@philips.com>, <johanna.1.nieminen@nokia.com>, <cabo@tzi.org>
Thread-Topic: [6lowpan] Ready for WGLC? (Re: Latest version of IPv6 over BT-LE draft)
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Date: Thu, 22 Sep 2011 13:53:12 +0000
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Subject: Re: [6lowpan] Ready for WGLC? (Re: Latest version of IPv6 over BT-LE draft)
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Esko,
DHCPv6 for 6LoWPAN network.

In the current version of I-D, there's one chapter (3.2.1) describing
"IPv6 Address Configuration", which mentioned "Stateless
autoconfiguration". Stateless autoconfiguration is defined in RFC4862,
which is different from "stateful autoconfiguration" (aka DHCPv6).

Compared with 6LoWPAN over BT-LE, draft-ietf-6lowpan-nd has defined the
mechanism to configure IPv6 addresses for 6LoWPAN over 802.15.4. In
draft-ietf-6lowpan-nd-17, there're several assumptions for 6lowpan-nd. It
says "All nodes in the network have an EUI-64 interface identifier in
order to do address auto-configuration and detect duplicate addresses."
Also, draft-ietf-6lowpan-nd introduces the Address Registration mechanism
and the optional DAD mechanism. DHCPv6 is not optimized for low-power and
lossy networks including 802.15.4 and BT-LE.

I think it is necessary to make the "IPv6 address configuration" for
6LoWPAN over BT-LE clear in the future revision.

Thank you!

-- 
Best Regards,
Minjun, Xi
Nokia Research Center





On 9/19/11 9:54 PM, "ext Dijk, Esko" <esko.dijk@philips.com> wrote:

>Dear BT-LE authors, all,
>
>I haven't done a detailed review but I have one technical
>comment/question. The typical case in the I-D is a BT-LE mobile phone,
>connected to the internet, acting as a 6LBR and distributing an IP prefix
>to 6LNs. Is it the intention that an IP prefix for the 6LoWPAN can be
>obtained by the phone via DHCPv6 ?  If so would an ISP support this for a
>phone connected to their 3G network?
>
>Obtaining an IP prefix by the 6LBR seems necessary to enable routing from
>a host on the internet to a 6LN.
>
>regards,
>Esko
>
>
>Esko Dijk
>
>Philips Corporate Technologies, Research
>High Tech Campus 34, Eindhoven, The Netherlands
>esko.dijk@philips.com
>
>
>
>
>-----Original Message-----
>From: 6lowpan-bounces@ietf.org [mailto:6lowpan-bounces@ietf.org] On
>Behalf Of Carsten Bormann
>Sent: Friday 9 September 2011 14:43
>To: 6lowpan@ietf.org
>Subject: [6lowpan] Ready for WGLC? (Re: Latest version of IPv6 over BT-LE
>draft)
>
>6LoWPANners,
>
>we are now looking at the third WG version (-02) of this draft.
>
>Are we ready to do a working-group last-call on this?
>
>-- if you see something major that needs to be done before this is ready,
>please speak up now.
>   (If you have technical comments, or maybe some editorial suggestions,
>these are also useful at this point, although there also will be time to
>comment in the actual WGLC.)
>
>-- conversely, if you have reviewed the document and like it, please do
>speak up (and please do say what you have specifically looked at).
>
>Of course, we don't want to go into a WGLC with glaring omissions (I
>gather Appendix A is not really a necessary part of this spec), and we
>also don't want to go into WGLC if the working group hasn't been able to
>review the document or, worse, if nobody actually cares.
>
>Please respond to this message by Sep 16.
>
>Gruesse, Carsten
>
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