[182370] in North American Network Operators' Group
Re: Dual stack IPv6 for IPv4 depletion
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Wed Jul 15 16:48:21 2015
X-Original-To: nanog@nanog.org
To: "Ricky Beam" <jfbeam@gmail.com>
In-Reply-To: Your message of "Wed, 15 Jul 2015 16:23:36 -0400."
<op.x1tz9mx9tfhldh@rbeam.xactional.com>
From: Valdis.Kletnieks@vt.edu
Date: Wed, 15 Jul 2015 16:48:10 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
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On Wed, 15 Jul 2015 16:23:36 -0400, "Ricky Beam" said:
> What seems like a great idea today becomes tomorrow's "what the f*** were
> they thinking".
However, this statement doesn't provide any actual guidance, as it's
potentially equally applicable to the "give each end customer a /48" crew and
the "Give them all a /56" crew.....
Actually, not true - in fact, it's demonstrable that a residential customer
can run through a /56. Just get a largish house, put up one router using
CeroWRT (or, I suspect a current/recent OpenWRT) that burns through 6-7 subnet
allocations), and then put a second one at the other end of the house and
it burns through 6-7. The second one has to dhcp-pd request at least 3 bits
for itself, which leaves the first one only 5 bits, of which *it* will burn
at least 3. If you create any VLANs at all, you just burned 4 and 4 bits,
and there goes that /56.
And that's burned all the subnets in a /56 *just hooking up 2 plug and play
routers*. There's none left for doing anything experimental/different.
(And I suspect Dave Taht can provide several CeroWRT config checkboxes that
will each burn another 1-3 bits each if you click on them and hit "apply" :)
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