[135455] in North American Network Operators' Group
Re: Using IPv6 with prefixes shorter than a /64 on a LAN
daemon@ATHENA.MIT.EDU (Ricky Beam)
Tue Jan 25 16:33:46 2011
To: "Owen DeLong" <owen@delong.com>
Date: Tue, 25 Jan 2011 16:32:59 -0500
From: "Ricky Beam" <jfbeam@gmail.com>
In-Reply-To: <58166C50-0B72-43A0-8AB8-25E803EA1619@delong.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, 25 Jan 2011 13:42:29 -0500, Owen DeLong <owen@delong.com> wrote:
> Seriously? Repetitively sweeping a /64? Let's do the math...
...
We've had this discussion before...
If the site is using SLAAC, then that 64bit target is effectively 48bits.
And I can make a reasonable guess at 24 of those bits. (esp. if I've seen
the address of even one of the machines.)
--Ricky
