Re: New Version Notification for draft-chakrabarti-nordmark-6man-efficient-nd-05.txt

Erik Nordmark <nordmark@sonic.net> Sat, 01 March 2014 13:50 UTC

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Date: Sat, 01 Mar 2014 14:01:03 +0100
From: Erik Nordmark <nordmark@sonic.net>
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To: 神明達哉 <jinmei@wide.ad.jp>, Erik Nordmark <nordmark@acm.org>
Subject: Re: New Version Notification for draft-chakrabarti-nordmark-6man-efficient-nd-05.txt
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On 2/28/14 11:53 PM, 神明達哉 wrote:
>
> I don't understand how it works in the bootstrap stage.  To send the
> NS/ARO for a link-local address (on bootstrap), the host should first
> know the registrar's address.  But the host can't get the information
> by unicast RS-RA exchange since the source address of the RS would
> need to be the link-local address to prove unique.  Or am I
> misunderstanding your intent?
That part isn't fully fleshed out in the draft.

To have a unicast RA prior to having registered the link-local address, 
the router needs to use the SLLA option in the RS - this would be the 
same mechanism as in the draft for sending errors to NS/AROs.

Thus the RS can have an unspecified source address while containing a 
SLLAO; something which isn't allowed in 4861 AFAICT. So need to look at 
mixed mode issues here.

    Erik