Re: [GLOBAL-V6] Re: I-D ACTION:draft-narten-ipv6-3177bis-48boundary-00.txt

[Thomas Narten <narten@us.ibm.com>]

David Conrad <david.conrad@nominum.com> writes:

> On Jul 19, 2005, at 2:42 AM, Brian E Carpenter wrote:
> > 3. I think it would be useful to add a note that if a site
> > starts out with a /56, migrating later to a /48, if needed,
> > would be fairly painless (no need to reorganize existing subnets).

> To be explicit, this would only be painless if /56 were allocated in  
> such a way as it would be growable to a /48.

And to be clear, I don't believe anyone is proposing this. I.e., going
from a /56 to a /48 would require renumbering, most likely.

To provide for an expansion, the ISP would need to hold the entire /48
in reserve. I don't believe anyone is proposing that (and I'm not sure
we should).

Thomas