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The Cidr Report

  • From: CIDR Report
  • Date: Sat Jan 26 02:03:24 2002


This is an auto-generated mail on Fri Jan 25 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      A summary of the last weeks changes in terms of withdrawn and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 25Jan02


0) General Status

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

Date	Prefixes
180102	104688
190102	104682
200102	104656
210102	104633
220102	104637
230102	104624
240102	104664
250102	104855

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:              12293

Number of ASes announcing only one prefix:      7436 (4212 cidr, 3224 classful)

Largest number of  cidr routes:                  716 announced by  AS701
Largest number of classful routes:              1364 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 25Jan02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1172      901      271   23.1%   Telstra Pty Ltd
AS701       1364     1130      234   17.2%   UUNET Technologies, Inc. 
AS4151       288      156      132   45.8%   USDA 
AS577        320      196      124   38.8%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS7018       815      697      118   14.5%   AT&T 
AS6595       172       61      111   64.5%   DoD Education Activity Network As
AS705        288      184      104   36.1%   UUNET Technologies, Inc. 
AS852        383      286       97   25.3%   Telus Advanced Communications 
AS17557      184       87       97   52.7%   Pakistan Telecom
AS7046       313      227       86   27.5%   UUNET Technologies, Inc. 
AS19632       95       13       82   86.3%   Metropolis Intercom S.A. 
AS2048       185      105       80   43.2%   State of Louisiana 
AS12302      111       32       79   71.2%   MobiFon S.A.
AS1239       469      391       78   16.6%   Sprint 
AS4755       223      151       72   32.3%   Videsh Sanchar Nigam Ltd. Autonom
AS703        275      213       62   22.5%   UUNET Technologies, Inc. 
AS3464       159       97       62   39.0%   Alabama SuperComputer Network 
AS724        214      155       59   27.6%   DLA Systems Automation Center 
AS226        146       89       57   39.0%   Los Nettos 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS702        657      601       56    8.5%   UUNET Technologies, Inc. 
AS7303       107       52       55   51.4%   Telecom Argentina Stet-France Tel
AS4323       383      328       55   14.4%   Time Warner Communications, Inc. 
AS3908       320      265       55   17.2%   Supernet, Inc. 
AS19834       63        8       55   87.3%   NetForce, Inc. 
AS4200       104       50       54   51.9%   Apex Global Information Services,
AS2149       313      260       53   16.9%   Performance Systems, Inc. 
AS13999       66       14       52   78.8%   Mega Cable S.A. de C.V. 
AS1          492      440       52   10.6%   BBN Planet 

Total      53762    42007    11755   21.9%


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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