[157246] in North American Network Operators' Group

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Re: Is a /48 still the smallest thing you can route independently?

daemon@ATHENA.MIT.EDU (Owen DeLong)
Thu Oct 11 18:26:07 2012

From: Owen DeLong <owen@delong.com>
In-Reply-To: <CAP-guGVB6FbxYcZFJ2EzKyue3rZ=by=ttZHodtwQ3yDHOKC1vA@mail.gmail.com>
Date: Thu, 11 Oct 2012 15:24:48 -0700
To: William Herrin <bill@herrin.us>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

Wow and I thought nibble boundaries would make the math easier than HD =
ratios.

Here's the breakdown for those who are mathematically challenged:

n sites			prefix
0			Nothing.
1			/48
2-12			/44
13-191			/40
192-3071		/36
3072-49,151		/32
49,152-786,431		/28

If you're managing more than 786,431 sites, then you should be able to =
afford
to hire someone who can properly handle the math.

Owen



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