Re: [Softwires] [BEHAVE] Some Thought about the Automatic Tunnel Address

[Rémi Després <remi.despres at free.fr>]

Le 8 sept. 09 à 06:17, Xu Xiaohu a écrit :

> > I floated the idea of a /96 for ISATAP during either an
> > intarea or ipv6 meeting several years ago (can't remember
> > which) but there was no uptake. Looking back, I don't see
> > any advantages, and in fact it goes against the model in
> > which IPv6 addresses beginning with other than '000' use
> > a 64-bit prefix.
>
> What's the real purpose of the above model (IPv6 addresses  
> beginning with
> other than '000' use a 64-bit prefix)? Can somebody help explain it?

Xu,

I had the view that this statement badly needed a reliable  
justification, and argued about it.

But it now happens that the study about routing-loop attacks  
documented last August by Gabi Nakibly, in www.ops.ietf.org/lists/ 
v6ops/v6ops.2009/msg00601, leads IMHO to such a justification.

I tried to explain all this in www.ietf.org/mail-archive/web/behave/ 
current/msg06816.
You may find relevant to this discussion.

Regards,
RD