The Cidr Report

Sat Jun 1 06:00:02 UTC 2002

This is an auto-generated mail on Fri May 31 23:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 31May02

0) General Status

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

Date	Prefixes
240502	110020
250502	110319
260502	109931
270502	110178
280502	110335
290502	110367
300502	110842
310502	110978

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

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

*** Bogus 220.36.0.0/16 from AS17676
*** Bogus 220.40.0.0/16 from AS17676
*** Bogus 220.47.0.0/16 from AS17676

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

Number of ASes in routing system:              13044

Number of ASes announcing only one prefix:      7934 (4445 cidr, 3489 classful)

Largest number of  cidr routes:                  635 announced by  AS701
Largest number of classful routes:              1357 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 31May02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS701       1357     1087      270   19.9%   UUNET Technologies, Inc. 
AS1221      1109      860      249   22.5%   UNREGISTERED
AS17557      285      109      176   61.8%   Pakistan Telecom
AS852        587      428      159   27.1%   Telus Advanced Communications 
AS7018       816      685      131   16.1%   AT&T 
AS16473      198       77      121   61.1%   Bell South 
AS6595       167       56      111   66.5%   DoD Education Activity Network As
AS705        304      203      101   33.2%   UUNET Technologies, Inc. 
AS4151       236      141       95   40.3%   USDA 
AS19632       98        4       94   95.9%   Metropolis Intercom S.A. 
AS1239       511      423       88   17.2%   Sprint 
AS16814      104       19       85   81.7%   NSS, S.A. 
AS12302      120       35       85   70.8%   SingNet 
AS7046       328      244       84   25.6%   UUNET Technologies, Inc. 
AS7303       148       68       80   54.1%   Telecom Argentina Stet-France Tel
AS2048       181      104       77   42.5%   State of Louisiana 
AS577        267      194       73   27.3%   Bell Advanced Communications Inc.
AS4323       416      345       71   17.1%   Time Warner Communications, Inc. 
AS724        220      154       66   30.0%   DLA Systems Automation Center 
AS226        154       91       63   40.9%   Los Nettos 
AS3464       166      104       62   37.3%   Alabama SuperComputer Network 
AS19834       64        4       60   93.8%   NetForce, Inc. 
AS10620       83       23       60   72.3%   TVCABLE BOGOTA 
AS4755       169      110       59   34.9%   Videsh Sanchar Nigam Ltd. Autonom
AS1          455      397       58   12.7%   GENUITY 
AS3908       311      254       57   18.3%   Supernet, Inc. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS209        312      256       56   17.9%   Qwest 
AS9051        81       26       55   67.9%   INCONET Autonomous System
AS3233       105       51       54   51.4%   RNC - Romanian Natioanal R&D Netw

Total      55292    42691    12601   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