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The Cidr Report
From: CIDR Report <cidr-report () cisco com>
Date: Fri, 07 Sep 2001 23:00:02 -0700



This is an auto-generated mail on Fri Sep  7 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      A summary of the last weeks changes in terms of withdrawn and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 07Sep01


0) General Status

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

Date    Prefixes
310801  103087
010901  103176
020901  103157
030901  103037
040901  103055
050901  103130
060901  103134
070901  103166

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:              11536

Number of ASes announcing only one prefix:      6868 (3907 cidr, 2961 classful)

Largest number of  cidr routes:                  847 announced by  AS701
Largest number of classful routes:              1395 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07Sep01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1285      971      314   24.4%   Telstra Pty Ltd
AS701       1395     1186      209   15.0%   UUNET Technologies, Inc. 
AS4151       294      165      129   43.9%   USDA 
AS577        313      192      121   38.7%   Bell Advanced Communications Inc.
AS6595       173       61      112   64.7%   DoD Education Activity Network As
AS4293       381      272      109   28.6%   Cable & Wireless USA 
AS16473      177       74      103   58.2%   Bell South 
AS13999      113       11      102   90.3%   Mega Cable S.A. de C.V. 
AS705        245      146       99   40.4%   UUNET Technologies, Inc. 
AS7018       756      660       96   12.7%   AT&T 
AS6429       194      102       92   47.4%   AT&T Chile Internet S.A. 
AS4755       214      127       87   40.7%   Videsh Sanchar Nigam Ltd. Autonom
AS12302       96       26       70   72.9%   MobiFon S.A.
AS724        230      162       68   29.6%   DLA Systems Automation Center 
AS4200       142       74       68   47.9%   Apex Global Information Services,
AS7046       320      254       66   20.6%   UUNET Technologies, Inc. 
AS1239       468      402       66   14.1%   Sprint 
AS6471       127       62       65   51.2%   ENTEL CHILE S.A. 
AS209        301      242       59   19.6%   Qwest 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS19632       67       11       56   83.6%   Metropolis Intercom S.A. 
AS703        311      256       55   17.7%   UUNET Technologies, Inc. 
AS3464       148       93       55   37.2%   Alabama SuperComputer Network 
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS226        145       93       52   35.9%   Los Nettos 
AS1          543      491       52    9.6%   BBN Planet 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS4323       241      194       47   19.5%   Time Warner Communications, Inc. 
AS15290      238      192       46   19.3%   AT&T Canada IES 
AS5536        55       10       45   81.8%   Internet Egypt Network


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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