[137243] in North American Network Operators' Group
Re: IPv6 mistakes, was: Re: Looking for an IPv6 naysayer...
daemon@ATHENA.MIT.EDU (Cutler James R)
Thu Feb 10 08:32:19 2011
From: Cutler James R <james.cutler@consultant.com>
In-Reply-To: <op.vqn8wqcytfhldh@rbeam.xactional.com>
Date: Thu, 10 Feb 2011 08:31:23 -0500
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Feb 10, 2011, at 12:15 AM, Ricky Beam wrote:
> On Wed, 09 Feb 2011 16:42:14 -0500, Nathan Eisenberg =
<nathan@atlasnetworks.us> wrote:
>> What do you mean, lit up? You mean they're not in the routing tables =
that you get from your carriers? I'd argue that's no indication of =
whether they're in use or not.
>=20
> That's pretty much the definition of "in use". If they don't appear =
in the global routing table, then they aren't being used. I cannot send =
traffic to them; they cannot send traffic to me.
>=20
> In my recent probe of route servers, I found 22 legacy /8's that were =
partly or completely unused. I'm a little surprised ARIN/ICANN thinks =
it's a waste of time to even try to reclaim them.
>=20
> --Ricky
This dead horse keep coming back for another beating. The purpose of a =
global registry of numbers is to provide a common source for unique =
numbers. The definition of "in use" by internet registries does not =
require appearance in your routing tables or even in the route servers. =
Not only that, the "users" may not even want or need to exchange traffic =
with you.
As a survivor of many network consolidations due to corporate =
acquisitions, I have many scars from trying to get separate RFC 1918 =
islands to interwork properly. That is the reason that even so-called =
private networks need unique IP addressing.
And now, since IPv6 is actually being deployed and used, there is =
absolutely no economic incentive to continue to fight the "IPv4 =
addresses not in my routing table are not 'in use'" battle any more. It =
is a waste of time and money.
James R. Cutler
james.cutler@consultant.com
