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Re: bgp geopolitical analysis (warning: zero operational content.or so.)

  • From: Hank Nussbacher
  • Date: Thu Nov 29 23:15:53 2001

On Thu, 29 Nov 2001, David Williamson wrote:

> On Thu, Nov 29, 2001 at 09:33:05AM +0200, Hank Nussbacher wrote:
> > ZA has the 3rd highest prefix count at 2700.Why does South Africa have 
> > such a high prefix count?
> 
> I thought it might be interesting to look at the ratio of prefixes
> to ASes.While some ASes may have a large number of ip allocations,
> and hence a need for more prefixes to be announced, most have rather few
> prefixes that need to be announced.On the other hand, as we all know,
> many ASes announce far more prefixes than necessary.Here's the top few
> in the list when sorted by ratio of prefixes to ASes:
> 
> country		prefixes/ASes
> ZA		77.22857143

Something in ZA looks skewed.  Can anyone shed light as to why ZA has so
many small prefixes (even with lots of users)?  Lack of CIDR?  Poor
allocation methods?  Clueless ISPs?   Thanks, Hank

> PK		38.75
> IN		30.83333333
> AU		27.6713615
> CL		24.25
> FI		22.68181818
> CA		22.23012552
> PR		21.66666667
> EC		21.66666667
> NZ		21.16129032
> 
> I've removed countries with fewer than 100 prefixes, since they have
> nearly meaningless ratios.The US is in the 11 range, and ?? comes in
> down around 9.
> 
> -David
> 

Hank Nussbacher






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