[154997] in North American Network Operators' Group
Re: using "reserved" IPv6 space
daemon@ATHENA.MIT.EDU (Jimmy Hess)
Wed Jul 18 23:01:20 2012
In-Reply-To: <20120719002548.C779D22AE4EE@drugs.dv.isc.org>
Date: Wed, 18 Jul 2012 22:00:43 -0500
From: Jimmy Hess <mysidia@gmail.com>
To: Mark Andrews <marka@isc.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 7/18/12, Mark Andrews <marka@isc.org> wrote:
[snip]
> space, you meet the requirements. Toss a coin for each bit. Heads
> =3D 1, tails =3D 0.
Sure... and if someone says they just happened to toss a coin 128
times, and got "0" all 128 times, therefore legitimately assigned ULA
ID is all zeros, I don't believe them.
(1 / 2)^128 * ([128 : 128])
for =E1 =3D 0.0000000002
H_0: fair coin
Observation: 128 heads out of 128 flips (or 128 tails out of 128 flips)
For H_0, Prob given >=3D 128 heads or >=3D tails =3D 2*(1 - Prob(<1=
28) ) =3D
< 0.000000000000000000000000000000000006%
Reject H_0.
Perhaps the world would be well served if the RFC called for routers to app=
ly
some [very lenient] randomness tests to the sequence of bits proposed
to be configured as a ULA ID.... :)
--=20
-JH
