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The Cidr Report
From: CIDR Report <cidr-report () cisco com>
Date: Fri, 28 Sep 2001 23:00:02 -0700



This is an auto-generated mail on Fri Sep 28 23:00:00 PDT 2001
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      A summary of the last weeks changes in terms of withdrawn and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 28Sep01


0) General Status

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

Date    Prefixes
210901  103625
220901  103684
230901  103666
240901  103680
250901  103629
260901  103632
270901  104968
280901  104483

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


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

*** Bogus 82.105.0.0/16 from AS3269
*** Bogus 82.105.128.0/17 from AS3269

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

Number of ASes in routing system:              11715

Number of ASes announcing only one prefix:      6979 (3955 cidr, 3024 classful)

Largest number of  cidr routes:                  855 announced by  AS701
Largest number of classful routes:              1389 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 28Sep01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1262      961      301   23.9%   Telstra Pty Ltd
AS4151       299      171      128   42.8%   USDA 
AS16473      201       76      125   62.2%   Bell South 
AS577        306      187      119   38.9%   Bell Advanced Communications Inc.
AS13999      132       16      116   87.9%   Mega Cable S.A. de C.V. 
AS6595       170       60      110   64.7%   DoD Education Activity Network As
AS4293       376      267      109   29.0%   Cable & Wireless USA 
AS2048       209      115       94   45.0%   State of Louisiana 
AS6429       195      102       93   47.7%   AT&T Chile Internet S.A. 
AS4755       213      131       82   38.5%   Videsh Sanchar Nigam Ltd. Autonom
AS12302       98       28       70   71.4%   MobiFon S.A.
AS1239       471      402       69   14.6%   Sprint 
AS4200       142       74       68   47.9%   Apex Global Information Services,
AS6471       128       63       65   50.8%   ENTEL CHILE S.A. 
AS17557      128       65       63   49.2%   Pakistan Telecom
AS3464       157       96       61   38.9%   Alabama SuperComputer Network 
AS19632       67        9       58   86.6%   Metropolis Intercom S.A. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS209        303      248       55   18.2%   Qwest 
AS3908       283      230       53   18.7%   Supernet, Inc. 
AS11686      160      107       53   33.1%   Education Networks of America 
AS226        145       93       52   35.9%   Los Nettos 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS1          533      482       51    9.6%   BBN Planet 
AS4323       247      197       50   20.2%   Time Warner Communications, Inc. 
AS306         59       10       49   83.1%   National Guard Bureau 
AS637        104       56       48   46.2%   Department of Navy 
AS10620       68       21       47   69.1%   TVCABLE BOGOTA 
AS1913       151      105       46   30.5%   Defense Logistics Agency 
AS15290      244      199       45   18.4%   AT&T Canada IES 


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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