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The Cidr Report

  • From: CIDR Report
  • Date: Sat Feb 16 02:04:34 2002


This is an auto-generated mail on Fri Feb 15 23:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 amont 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@cisco.com>.


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

                        CIDR REPORT for 15Feb02


0) General Status

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

Date	Prefixes
080202	105598
090202	105704
100202	105732
110202	105576
120202	105729
130202	105810
140202	105555
150202	105693

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


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

*** Bogus 96.0.0.0/20 from AS3549

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

Number of ASes in routing system:              12420

Number of ASes announcing only one prefix:      7568 (4308 cidr, 3260 classful)

Largest number of  cidr routes:                  722 announced by  AS701
Largest number of classful routes:              1371 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 15Feb02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1152      889      263   22.8%   Telstra Pty Ltd
AS701       1371     1126      245   17.9%   UUNET Technologies, Inc. 
AS577        324      198      126   38.9%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS7018       821      703      118   14.4%   AT&T 
AS6595       172       60      112   65.1%   DoD Education Activity Network As
AS4151       253      148      105   41.5%   USDA 
AS705        307      203      104   33.9%   UUNET Technologies, Inc. 
AS852        427      326      101   23.7%   Telus Advanced Communications 
AS7046       318      232       86   27.0%   UUNET Technologies, Inc. 
AS19632       94        9       85   90.4%   Metropolis Intercom S.A. 
AS2048       186      105       81   43.5%   State of Louisiana 
AS12302      111       32       79   71.2%   MobiFon S.A.
AS1239       479      403       76   15.9%   Sprint 
AS4323       416      344       72   17.3%   Time Warner Communications, Inc. 
AS3908       337      270       67   19.9%   Supernet, Inc. 
AS4755       192      129       63   32.8%   Videsh Sanchar Nigam Ltd. Autonom
AS3464       157       97       60   38.2%   Alabama SuperComputer Network 
AS703        275      216       59   21.5%   UUNET Technologies, Inc. 
AS7303       107       49       58   54.2%   Telecom Argentina Stet-France Tel
AS724        212      154       58   27.4%   DLA Systems Automation Center 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS226        145       89       56   38.6%   Los Nettos 
AS19834       63        8       55   87.3%   NetForce, Inc. 
AS10620       77       22       55   71.4%   TVCABLE BOGOTA 
AS702        624      570       54    8.7%   UUNET Technologies, Inc. 
AS209        302      250       52   17.2%   Qwest 
AS1          478      426       52   10.9%   BBN Planet 
AS9051        74       23       51   68.9%   INCONET Autonomous System
AS2149       304      253       51   16.8%   Performance Systems, Inc. 

Total      53554    41894    11660   21.8%


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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