At Thu, 13 Mar 2008 16:01:37 -0700,
Erik Nordmark <[EMAIL PROTECTED]> wrote:

> > and states as follows:
> > 
> >    All Global Unicast addresses other than those that start with binary
> >    000 have a 64-bit interface ID field (i.e., n + m = 64),
> > (this means the subnet prefix is 64).
> 
> Yes, but that RFC describes how the IPv6 address space is structured.

I know, but my point is that the unclear definition around "subnet"
with this specific structure may let an implementor regard the 64-bit
prefix as on-link.

> > If this makes sense, I'd propose revising bullet #2 of Section 2 as
> > follows:
> > 
> >    2.  The configuration of an IPv6 address, whether through IPv6
> >        stateless address autoconfiguration [RFC4862], DHCPv6
> >        [RFC3315], or manual configuration does not imply that any
> >        prefix is on- link.  This means the address should initially be
> >        considered the one having no internal structure as shown in
> >        [RFC4291].  A host is explicitly told that prefixes or
> >        addresses are on-link through the means specified in [RFC4861].
> 
> I think your added sentence is good but it might be better to add it in 
> the introduction instead of in this bullet.

That's fine, and I also agree with the addition below.  In fact, I've
been thinking my suggested text may still not be perfectly clear.
Yours is much better than mine in clarity.

> We could in addition say
>       The fact that Global Unicast addresses other than those that
>       start with binary 000 have a 64-bit interface ID field [RFC4291]
>       does not imply that the 64 bit prefix should be considered
>       on-link.

---
JINMEI, Tatuya
Internet Systems Consortium, Inc.
--------------------------------------------------------------------
IETF IPv6 working group mailing list
ipv6@ietf.org
Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
--------------------------------------------------------------------

Reply via email to