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The Cidr Report
From: CIDR Report <cidr-report () cisco com>
Date: Fri, 14 Sep 2001 23:00:02 -0700



This is an auto-generated mail on Fri Sep 14 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      A summary of the last weeks changes in terms of withdrawn and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 14Sep01


0) General Status

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

Date    Prefixes
070901  103166
080901  102958
090901  102972
100901  103070
110901  103168
120901  102677
130901  102777
140901  102582

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:              11538

Number of ASes announcing only one prefix:      6879 (3912 cidr, 2967 classful)

Largest number of  cidr routes:                  837 announced by  AS701
Largest number of classful routes:              1362 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 14Sep01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1279      969      310   24.2%   Telstra Pty Ltd
AS701       1362     1162      200   14.7%   UUNET Technologies, Inc. 
AS4151       286      163      123   43.0%   USDA 
AS577        313      192      121   38.7%   Bell Advanced Communications Inc.
AS6595       171       60      111   64.9%   DoD Education Activity Network As
AS4293       379      270      109   28.8%   Cable & Wireless USA 
AS13999      113       11      102   90.3%   Mega Cable S.A. de C.V. 
AS705        247      148       99   40.1%   UUNET Technologies, Inc. 
AS16473      171       74       97   56.7%   Bell South 
AS6429       195      100       95   48.7%   AT&T Chile Internet S.A. 
AS7018       755      661       94   12.5%   AT&T 
AS4755       215      129       86   40.0%   Videsh Sanchar Nigam Ltd. Autonom
AS12302       97       27       70   72.2%   MobiFon S.A.
AS4200       142       74       68   47.9%   Apex Global Information Services,
AS724        221      156       65   29.4%   DLA Systems Automation Center 
AS6471       127       62       65   51.2%   ENTEL CHILE S.A. 
AS1239       469      404       65   13.9%   Sprint 
AS7046       316      254       62   19.6%   UUNET Technologies, Inc. 
AS209        310      252       58   18.7%   Qwest 
AS19632       67        9       58   86.6%   Metropolis Intercom S.A. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS3464       149       94       55   36.9%   Alabama SuperComputer Network 
AS703        309      255       54   17.5%   UUNET Technologies, Inc. 
AS17557      121       68       53   43.8%   Pakistan Telecom
AS226        145       93       52   35.9%   Los Nettos 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS1          539      488       51    9.5%   BBN Planet 
AS4323       249      199       50   20.1%   Time Warner Communications, Inc. 
AS855        144       96       48   33.3%   Canadian Research Network 
AS852        206      160       46   22.3%   Telus Advanced Communications 


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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