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Re: Fraction of transit ASes going down? [Re: [RAM] TIDR using the IDENTIFIERS attribute]
Hello;
On Apr 25, 2007, at 9:10 AM, JUAN-JOSE.ADAN at giss.seg-social.es wrote:
Pierre,
See my comments below.
Pierre Francois <pfr at info.ucl.ac.be> wrote on 25/04/2007 13:35:06:
>
> Juan-Jose,
>
> A simple question for you :
>
> Where does the growth happen with the years ?
> I.e., how does this transit ratio evolve during the life of the
internet ?
> + Same question with finer granularity than just transit vs.
leaf., if
> possible.
>
> I would like to know wether we're roughly just getting new leaves or
> close-to-be leaves, or if the growth is more homogeneous
> in the hierarchy.
When trying to find out the fraction of transit AS-es I just
used the RIS Statistics Report provided by RIPE. I didn't
use any script at all. I simply made a number of calculations
using the last statistics reports and found 1/6 as the
approximate value. I don't understand why this value differs
from the one calculated by Ricardo and Simon. Any clue?.
I do not know, but if I had to guess I would guess this is the effect
of route aggregation, which will tend
to "bury" leaf asn's.
I get 12% (1/6 is 16.6%) from my BGP data, so this is even less. The
following
histogram for 6:00 AM today might be interesting.
All of this data is available going back to 2001; what exactly do you
think it would
useful to plot ?
Regards
Marshall
Histogram of the number of AS Supported Out of 24857
(In my terminology, an ASN
"supports" every ASN that can be seen in transit through it; so the
ASN with support = 1 are
leaf ASNs.)
Number ASN Supporting 1 ASN = 21989 or 88.462 %
Number ASN Supporting 2 ASN = 1210 or 4.868 %
Number ASN Supporting 3 ASN = 431 or 1.734 %
Number ASN Supporting 4 ASN = 234 or 0.941 %
Number ASN Supporting 5 ASN = 161 or 0.648 %
Number ASN Supporting 6 ASN = 108 or 0.434 %
Number ASN Supporting 7 ASN = 79 or 0.318 %
Number ASN Supporting 8 ASN = 66 or 0.266 %
Number ASN Supporting 9 ASN = 53 or 0.213 %
Number ASN Supporting 10 ASN = 32 or 0.129 %
Number ASN Supporting 11 ASN = 38 or 0.153 %
Number ASN Supporting 12 ASN = 32 or 0.129 %
Number ASN Supporting 13 ASN = 23 or 0.093 %
Number ASN Supporting 14 ASN = 27 or 0.109 %
Number ASN Supporting 15 ASN = 17 or 0.068 %
Number ASN Supporting 16 ASN = 24 or 0.097 %
Number ASN Supporting 17 ASN = 14 or 0.056 %
Number ASN Supporting 18 ASN = 15 or 0.060 %
Number ASN Supporting 19 ASN = 9 or 0.036 %
Number ASN Supporting 20 ASN = 10 or 0.040 %
Number ASN Supporting 21 ASN = 15 or 0.060 %
Number ASN Supporting 22 ASN = 7 or 0.028 %
Number ASN Supporting 23 ASN = 10 or 0.040 %
Number ASN Supporting 24 ASN = 7 or 0.028 %
Number ASN Supporting 25 ASN = 8 or 0.032 %
Number ASN Supporting 26 ASN = 3 or 0.012 %
Number ASN Supporting 27 ASN = 9 or 0.036 %
Number ASN Supporting 28 ASN = 4 or 0.016 %
Number ASN Supporting 29 ASN = 7 or 0.028 %
Number ASN Supporting 30 ASN = 9 or 0.036 %
Number ASN Supporting 31 ASN = 6 or 0.024 %
Number ASN Supporting 32 ASN = 8 or 0.032 %
Number ASN Supporting 33 ASN = 7 or 0.028 %
Number ASN Supporting 34 ASN = 5 or 0.020 %
Number ASN Supporting 35 ASN = 3 or 0.012 %
Number ASN Supporting 36 ASN = 5 or 0.020 %
Number ASN Supporting 37 ASN = 7 or 0.028 %
Number ASN Supporting 38 ASN = 3 or 0.012 %
Number ASN Supporting 40 ASN = 6 or 0.024 %
Number ASN Supporting 41 ASN = 5 or 0.020 %
Number ASN Supporting 42 ASN = 2 or 0.008 %
Number ASN Supporting 43 ASN = 2 or 0.008 %
Number ASN Supporting 44 ASN = 2 or 0.008 %
Number ASN Supporting 45 ASN = 3 or 0.012 %
Number ASN Supporting 46 ASN = 2 or 0.008 %
Number ASN Supporting 47 ASN = 1 or 0.004 %
Number ASN Supporting 48 ASN = 6 or 0.024 %
Number ASN Supporting 49 ASN = 6 or 0.024 %
Number ASN Supporting 51 ASN = 2 or 0.008 %
Number ASN Supporting 52 ASN = 1 or 0.004 %
Number ASN Supporting 53 ASN = 1 or 0.004 %
Number ASN Supporting 54 ASN = 2 or 0.008 %
Number ASN Supporting 55 ASN = 1 or 0.004 %
Number ASN Supporting 57 ASN = 3 or 0.012 %
Number ASN Supporting 58 ASN = 2 or 0.008 %
Number ASN Supporting 59 ASN = 2 or 0.008 %
Number ASN Supporting 61 ASN = 1 or 0.004 %
Number ASN Supporting 64 ASN = 1 or 0.004 %
Number ASN Supporting 65 ASN = 1 or 0.004 %
Number ASN Supporting 66 ASN = 1 or 0.004 %
Number ASN Supporting 67 ASN = 3 or 0.012 %
Number ASN Supporting 68 ASN = 1 or 0.004 %
Number ASN Supporting 71 ASN = 2 or 0.008 %
Number ASN Supporting 72 ASN = 1 or 0.004 %
Number ASN Supporting 73 ASN = 2 or 0.008 %
Number ASN Supporting 75 ASN = 2 or 0.008 %
Number ASN Supporting 79 ASN = 1 or 0.004 %
Number ASN Supporting 81 ASN = 1 or 0.004 %
Number ASN Supporting 83 ASN = 1 or 0.004 %
Number ASN Supporting 85 ASN = 1 or 0.004 %
Number ASN Supporting 87 ASN = 1 or 0.004 %
Number ASN Supporting 89 ASN = 1 or 0.004 %
Number ASN Supporting 90 ASN = 1 or 0.004 %
Number ASN Supporting 92 ASN = 1 or 0.004 %
Number ASN Supporting 94 ASN = 1 or 0.004 %
Number ASN Supporting 98 ASN = 2 or 0.008 %
Number ASN Supporting 99 ASN = 1 or 0.004 %
Number ASN Supporting 101 ASN = 1 or 0.004 %
Number ASN Supporting 102 ASN = 1 or 0.004 %
Number ASN Supporting 103 ASN = 1 or 0.004 %
Number ASN Supporting 105 ASN = 1 or 0.004 %
Number ASN Supporting 107 ASN = 1 or 0.004 %
Number ASN Supporting 110 ASN = 1 or 0.004 %
Number ASN Supporting 114 ASN = 1 or 0.004 %
Number ASN Supporting 118 ASN = 1 or 0.004 %
Number ASN Supporting 131 ASN = 1 or 0.004 %
Number ASN Supporting 132 ASN = 1 or 0.004 %
Number ASN Supporting 133 ASN = 1 or 0.004 %
Number ASN Supporting 134 ASN = 1 or 0.004 %
Number ASN Supporting 142 ASN = 1 or 0.004 %
Number ASN Supporting 154 ASN = 1 or 0.004 %
Number ASN Supporting 155 ASN = 1 or 0.004 %
Number ASN Supporting 158 ASN = 2 or 0.008 %
Number ASN Supporting 160 ASN = 1 or 0.004 %
Number ASN Supporting 163 ASN = 1 or 0.004 %
Number ASN Supporting 169 ASN = 1 or 0.004 %
Number ASN Supporting 170 ASN = 1 or 0.004 %
Number ASN Supporting 176 ASN = 1 or 0.004 %
Number ASN Supporting 186 ASN = 1 or 0.004 %
Number ASN Supporting 189 ASN = 1 or 0.004 %
Number ASN Supporting 197 ASN = 1 or 0.004 %
Number ASN Supporting 201 ASN = 1 or 0.004 %
Number ASN Supporting 204 ASN = 1 or 0.004 %
Number ASN Supporting 216 ASN = 1 or 0.004 %
Number ASN Supporting 219 ASN = 1 or 0.004 %
Number ASN Supporting 232 ASN = 1 or 0.004 %
Number ASN Supporting 237 ASN = 1 or 0.004 %
Number ASN Supporting 239 ASN = 1 or 0.004 %
Number ASN Supporting 241 ASN = 1 or 0.004 %
Number ASN Supporting 253 ASN = 1 or 0.004 %
Number ASN Supporting 254 ASN = 1 or 0.004 %
Number ASN Supporting 267 ASN = 1 or 0.004 %
Number ASN Supporting 273 ASN = 1 or 0.004 %
Number ASN Supporting 297 ASN = 1 or 0.004 %
Number ASN Supporting 300 ASN = 2 or 0.008 %
Number ASN Supporting 315 ASN = 1 or 0.004 %
Number ASN Supporting 322 ASN = 1 or 0.004 %
Number ASN Supporting 349 ASN = 1 or 0.004 %
Number ASN Supporting 389 ASN = 1 or 0.004 %
Number ASN Supporting 413 ASN = 1 or 0.004 %
Number ASN Supporting 423 ASN = 1 or 0.004 %
Number ASN Supporting 425 ASN = 1 or 0.004 %
Number ASN Supporting 440 ASN = 1 or 0.004 %
Number ASN Supporting 584 ASN = 1 or 0.004 %
Number ASN Supporting 834 ASN = 1 or 0.004 %
Number ASN Supporting 888 ASN = 1 or 0.004 %
Number ASN Supporting 945 ASN = 1 or 0.004 %
Number ASN Supporting 947 ASN = 1 or 0.004 %
Number ASN Supporting 1054 ASN = 1 or 0.004 %
Number ASN Supporting 1896 ASN = 1 or 0.004 %
Therefore I cannot answer your questions properly. I think
it would be very interesting if we could have a figure showing
the evolution of this fraction. And I also suggested that it
is probable that its value would decrease because of the
number of companies requesting a public AS number to get
multihomed. This is just a personal conjecture that I would
like to see contrasted with the real Internet.
Regards,
Juanjo
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