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Re: The Cidr Report

  • From: Hank Nussbacher
  • Date: Tue Jan 15 02:25:45 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     A summary of the last weeks changes in terms of withdrawn and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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