The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Jul 13 06:00:02 UTC 2002



This is an auto-generated mail on Fri Jul 12 23:00:00 PDT 2002
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 the amount of aggregation you 
perform.

Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.

NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for
the regional version of this report.

NEW: Check http://www.employees.org/~tbates/autnums.html for a complete
list of autonomous system number to name mappings as used by the CIDR-Report.

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      A summary of the last weeks changes in terms of withdrawn and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 amount of withdrawls.

   3) Interesting aggregates

      Interesting here means not an aggregate made as a set of 
      classful routes.      

Thanks to GX Networks for giving me access to their routing tables once a
day. 

Please send any comments about this report directly to CIDR Report <cidr-report at cisco.com>.



------------------------------------------------------------------------------

                        CIDR REPORT for 12Jul02


0) General Status

Table History
-------------

Date	Prefixes
050702	110820
060702	111129
070702	111069
080702	111088
090702	111212
100702	111153
110702	111369
120702	111339

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.


Possible Bogus Routes
---------------------


AS Summary
----------

Number of ASes in routing system:              13208

Number of ASes announcing only one prefix:      8040 (4516 cidr, 3524 classful)

Largest number of  cidr routes:                  615 announced by AS3908
Largest number of classful routes:              1230 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 12Jul02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1089      840      249   22.9%   Telstra Pty Ltd
AS701       1230      982      248   20.2%   UUNET Technologies, Inc. 
AS17557      304      107      197   64.8%   Pakistan Telecom
AS6595       221       54      167   75.6%   DoD Education Activity Network As
AS852        549      407      142   25.9%   Telus Advanced Communications 
AS7018       794      668      126   15.9%   AT&T 
AS16473      195       77      118   60.5%   Bell South 
AS7303       167       72       95   56.9%   Telecom Argentina Stet-France Tel
AS4151       235      140       95   40.4%   USDA 
AS19632       99        5       94   94.9%   Metropolis Intercom S.A. 
AS1239       519      425       94   18.1%   Sprint 
AS12302      118       30       88   74.6%   MobiFon S.A.
AS16814      105       20       85   81.0%   NSS, S.A. 
AS7046       315      231       84   26.7%   UUNET Technologies, Inc. 
AS2048       181      103       78   43.1%   State of Louisiana 
AS2149       367      294       73   19.9%   Performance Systems, Inc. 
AS577        262      190       72   27.5%   Bell Advanced Communications Inc.
AS724        231      163       68   29.4%   DLA Systems Automation Center 
AS4323       402      334       68   16.9%   Time Warner Communications, Inc. 
AS3464       163      102       61   37.4%   Alabama SuperComputer Network 
AS19834       64        4       60   93.8%   NetForce, Inc. 
AS10620       84       24       60   71.4%   TVCABLE BOGOTA 
AS1          444      386       58   13.1%   GENUITY 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS3908       296      240       56   18.9%   Supernet, Inc. 
AS209        310      254       56   18.1%   Qwest 
AS9498        83       28       55   66.3%   BHARTI BT INTERNET LTD.
AS9051        81       29       52   64.2%   INCONET Autonomous System
AS6535        65       16       49   75.4%   Chilesat Servicios  Empresariales
AS703        271      225       46   17.0%   UUNET Technologies, Inc. 

Total      54793    42301    12492   22.8%


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



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