The Cidr Report
Hank Nussbacher
hank at att.net.il
Tue Jan 15 07:21:07 UTC 2002
On Fri, 25 May 2001, Tony Bates wrote:
Something wrong here. Today is not May 25 and we *never* see a drop of 3K
prefixes. -Hank
>
>
> This is an auto-generated mail on Fri May 25 23:00:00 PDT 2001
> It is not checked before it leaves my workstation.However, hopefully
> you will find this report interesting and will take the time to look
> through this to see if you can improve theamount of aggregation you
> perform.
>
> The report is split into sections:
>
> 0) General Status
>
> List the route table history for the last week, list any possibly
> bogus routes seen and give some status on ASes.
>
> 1) Gains by aggregating at the origin AS level
>
> This lists the "Top 30" players who if they decided to aggregate
> their announced classful prefixes at the origin AS level could
> make a significant difference in the reduction of the current
> size of the Internet routing table. This calculation does not
> take into account the inclusion of holes when forming an aggregate
> so it is possible even larger reduction should be possible.
>
> 2) Weekly Delta
>
> A summary of the last weeks changes in terms of withdrawn and
> added routes. Please note that this is only a snapshot but does
> give some indication of ASes participating in CIDR. Clearly,
> it is generally a good thing to see a large amont of withdrawls.
>
> 3) Interesting aggregates
>
> Interesting here means not an aggregate made as a set of
> classful routes.
>
> Thanks to xara.net for giving me access to their routing tables once a
> day.
>
> Please send any comments about this report directly to me.
>
> Check http://www.employees.org/~tbates/cidr-report.html for a daily
> update of this report.
>
>
>
> ------------------------------------------------------------------------------
>
> CIDR REPORT for 25May01
>
>
> 0) General Status
>
> Table History
> -------------
>
> Date Prefixes
> 040501 104512
> 050501 104646
> 060501 104816
> 070501 106340
> 080501 105979
> 230501 101875
> 240501 101755
> 250501 101869
>
> Check http://www.employees.org/~tbates/cidr.plot.html for a plot
> ofthe table history.
>
>
> Possible Bogus Routes
> ---------------------
>
> *** Bogus 80.9.0.0/18 from AS3215
> *** Bogus 80.9.128.0/18 from AS3215
> *** Bogus 80.64.0.0/20 from AS3246
> *** Bogus 80.64.128.0/20 from AS20751
> *** Bogus 80.64.224.0/20 from AS3259
> *** Bogus 80.65.128.0/20 from AS9057
> *** Bogus 80.65.224.0/20 from AS13193
> *** Bogus 80.66.32.0/20 from AS702
> *** Bogus 80.66.128.0/20 from AS1239
> *** Bogus 80.67.0.0/20 from AS20750
> *** Bogus 80.67.32.0/20 from AS20752
> *** Bogus 218.2.0.0/15 from AS4134
> *** Bogus 218.4.0.0/16 from AS4134
> *** Bogus 218.6.128.0/17 from AS4134
>
> AS Summary
> ----------
>
> Number of ASes in routing system: 10851
>
> Number of ASes announcing only one prefix: 6431 (3657 cidr, 2774 classful)
>
> Largest number ofcidr routes: 975 announced by AS701
> Largest number of classful routes: 1409 announced by AS701
>
>
>
> 1) Gains by aggregating at the origin AS level
>
> --- 25May01 ---
> ASnum NetsNow NetsCIDR NetGain% Gain Description
>
> AS1221 1391 1031 360 25.9% TELSTRA-AS
> AS13999 103 11 92 89.3% autonomous system number assigned
> AS11252 91 33 58 63.7% autonomous system number assigned
> AS226 150 93 57 38.0% Los Nettos
> AS16758 63 6 57 90.5% autonomous system number assigned
> AS2149 320 265 55 17.2% PSINET-2
> AS1 592 539 53 9.0% GTE Internetworking
> AS11686 143 91 52 36.4% Education Networks of America
> AS10692 66 14 52 78.8% DLS Internet Services AS10692
> AS17561 111 60 51 45.9% UNKNOWN
> AS13544 69 22 47 68.1% autonomous system number assigned
> AS11774 74 28 46 62.2% AS 11774 Object
> AS1267 67 25 42 62.7% Infostrada S.p.A.
> AS1237 94 52 42 44.7% KISTI
> AS1239 441 400 41 9.3% SprintLink Backbone
> AS12235 48 7 41 85.4% Cove Software Systems Inc
> AS2652 113 75 38 33.6% Government of Canada (GENet) back
> AS209 263 226 37 14.1% Qwest Communications
> AS19834 49 12 37 75.5% autonomous system number assigned
> AS18447 46 9 37 80.4% autonomous system number assigned
> AS13345 67 30 37 55.2% autonomous system number assigned
> AS14 51 15 36 70.6% Columbia University in the City o
> AS12302 63 28 35 55.6% MobiFon S.A.
> AS2007 153 119 34 22.2% Infonet Services Corporation
> AS11507 87 53 34 39.1% TouchAmerica Montana
> AS10620 52 18 34 65.4% autonomous system number assigned
> AS11311 42 9 33 78.6% autonomous system number assigned
> AS10479 40 7 33 82.5% ITESM-Rectoria Zona Norte
> AS1913 115 83 32 27.8% autonomous system number assigned
> AS11859 45 13 32 71.1% autonomous system number assigned
>
>
> For the rest of the previous weeks gain information please see
> http://www.employees.org:80/~tbates/cidr-report.html
>
> 2) Weekly Delta
>
> Please see
> http://www.employees.org:80/~tbates/cidr-report.html
> for this part of the report
>
> 3) Interesting aggregates
>
> Please see
> http://www.employees.org:80/~tbates/cidr-report.html
> for this part of the report
>
Hank Nussbacher
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