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The Cidr Report

  • From: CIDR Report
  • Date: Sat Feb 23 02:03:41 2002


This is an auto-generated mail on Fri Feb 22 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      A summary of the last weeks changes in terms of withdrawn and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 22Feb02


0) General Status

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

Date	Prefixes
150202	105693
160202	105736
170202	105803
180202	105879
190202	105989
200202	106186
210202	105821
220202	106236

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:              12451

Number of ASes announcing only one prefix:      7566 (4299 cidr, 3267 classful)

Largest number of  cidr routes:                  728 announced by  AS701
Largest number of classful routes:              1369 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 22Feb02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1150      886      264   23.0%   Telstra Pty Ltd
AS701       1369     1125      244   17.8%   UUNET Technologies, Inc. 
AS17557      224       96      128   57.1%   Pakistan Telecom
AS7018       836      712      124   14.8%   AT&T 
AS577        320      197      123   38.4%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS4151       254      149      105   41.3%   USDA 
AS705        309      205      104   33.7%   UUNET Technologies, Inc. 
AS852        425      324      101   23.8%   Telus Advanced Communications 
AS6595       150       55       95   63.3%   DoD Education Activity Network As
AS7046       324      239       85   26.2%   UUNET Technologies, Inc. 
AS19632       94        9       85   90.4%   Metropolis Intercom S.A. 
AS2048       186      105       81   43.5%   State of Louisiana 
AS12302      110       31       79   71.8%   MobiFon S.A.
AS1239       482      405       77   16.0%   Sprint 
AS4323       432      356       76   17.6%   Time Warner Communications, Inc. 
AS4755       221      147       74   33.5%   Videsh Sanchar Nigam Ltd. Autonom
AS3908       339      271       68   20.1%   Supernet, Inc. 
AS3464       157       97       60   38.2%   Alabama SuperComputer Network 
AS724        215      156       59   27.4%   DLA Systems Automation Center 
AS7303       106       48       58   54.7%   Telecom Argentina Stet-France Tel
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 
AS9051        75       22       53   70.7%   INCONET Autonomous System
AS702        621      568       53    8.5%   UUNET Technologies, Inc. 
AS703        271      219       52   19.2%   UUNET Technologies, Inc. 
AS2149       305      253       52   17.0%   Performance Systems, Inc. 
AS209        300      248       52   17.3%   Qwest 

Total      53958    42075    11883   22.0%


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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