IETF Logo Mail Archive

Re: off-link model in the 6lowpan talk: draft-ietf-6lowpan-nd-07

Suresh Krishnan <suresh.krishnan@ericsson.com> Wed, 11 November 2009 02:27 UTC

Return-Path: <suresh.krishnan@ericsson.com>
X-Original-To: ipv6@core3.amsl.com
Delivered-To: ipv6@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id C22C93A67D3 for <ipv6@core3.amsl.com>; Tue, 10 Nov 2009 18:27:40 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.582
X-Spam-Level:
X-Spam-Status: No, score=-6.582 tagged_above=-999 required=5 tests=[AWL=0.017, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id m-06XEu5j1kH for <ipv6@core3.amsl.com>; Tue, 10 Nov 2009 18:27:39 -0800 (PST)
Received: from imr1.ericy.com (imr1.ericy.com [198.24.6.9]) by core3.amsl.com (Postfix) with ESMTP id CD69928C26F for <ipv6@ietf.org>; Tue, 10 Nov 2009 18:27:39 -0800 (PST)
Received: from eusrcmw750.eamcs.ericsson.se (eusrcmw750.exu.ericsson.se [138.85.77.50]) by imr1.ericy.com (8.13.1/8.13.1) with ESMTP id nAB2RVoF017213; Tue, 10 Nov 2009 20:27:34 -0600
Received: from eusrcmw750.eamcs.ericsson.se ([138.85.77.53]) by eusrcmw750.eamcs.ericsson.se with Microsoft SMTPSVC(6.0.3790.3959); Tue, 10 Nov 2009 20:26:53 -0600
Received: from eusaamw0707.eamcs.ericsson.se ([147.117.20.32]) by eusrcmw750.eamcs.ericsson.se with Microsoft SMTPSVC(6.0.3790.3959); Tue, 10 Nov 2009 20:26:53 -0600
Received: from [142.133.10.113] (147.117.20.212) by eusaamw0707.eamcs.ericsson.se (147.117.20.92) with Microsoft SMTP Server id 8.1.375.2; Tue, 10 Nov 2009 21:26:52 -0500
Message-ID: <4AFA20A3.1000804@ericsson.com>
Date: Tue, 10 Nov 2009 21:25:39 -0500
From: Suresh Krishnan <suresh.krishnan@ericsson.com>
User-Agent: Thunderbird 2.0.0.23 (X11/20090817)
MIME-Version: 1.0
To: "Hemant Singh (shemant)" <shemant@cisco.com>
Subject: Re: off-link model in the 6lowpan talk: draft-ietf-6lowpan-nd-07
References: <AF742F21C1FCEE4DAB7F4842ABDC511C1C2927@XMB-RCD-114.cisco.com>
In-Reply-To: <AF742F21C1FCEE4DAB7F4842ABDC511C1C2927@XMB-RCD-114.cisco.com>
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 7bit
X-OriginalArrivalTime: 11 Nov 2009 02:26:53.0120 (UTC) FILETIME=[6E642400:01CA6276]
Cc: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "ipv6@ietf.org" <ipv6@ietf.org>, Erik Nordmark <erik.nordmark@sun.com>, Dave Thaler <dthaler@microsoft.com>, "samitac@ipinfusion.com" <samitac@ipinfusion.com>, "cabo@tzi.org" <cabo@tzi.org>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ipv6>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 11 Nov 2009 02:27:40 -0000

Hi Hemant,

On 09-11-09 08:16 PM, Hemant Singh (shemant) wrote:
> Humble apologies for not reading this lowpan doc, but I have listened to 
> its core ideas during the past IETFs prezos and understand the link 
> model being used for it.   I still have some general comments that are 
> worth discussing when bringing such work to 6man.
> 
>  
> 
> Note that if the multi-link, multi-hop network has all client nodes as 
> off-link to each other, then there is only one type of regular ND 
> (RFC4861) RA that can signal off-link.  This is an RA with no PIO 
> (Prefix Information Option).   

This is not accurate. This can also be signaled using an RA including a 
PIO by setting L=0 in the PIO.

> So if the RA has no PIO, how are the 
> lowpann client nodes acquiring their IPv6 address global address without 
> SLAAC getting no prefix from?  In 6man, we would like to know how are 

The A bit can still be set in the PIO to allow for SLAAC.

Thanks
Suresh

v2.23.0 | Report a Bug | By Email