nanog mailing list archives

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


From: Owen DeLong <owen () delong com>
Date: Thu, 11 Oct 2012 15:24:48 -0700

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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