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The Cidr Report
From: CIDR Report <cidr-report () cisco com>
Date: Fri, 21 Sep 2001 23:00:04 -0700



This is an auto-generated mail on Fri Sep 21 23:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 21Sep01


0) General Status

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

Date    Prefixes
140901  102582
150901  102950
160901  102809
170901  103092
180901  103047
190901  102981
200901  103292
210901  103625

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:              11609

Number of ASes announcing only one prefix:      6928 (3946 cidr, 2982 classful)

Largest number of  cidr routes:                  854 announced by  AS701
Largest number of classful routes:              1379 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 21Sep01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1259      956      303   24.1%   Telstra Pty Ltd
AS701       1379     1176      203   14.7%   UUNET Technologies, Inc. 
AS4151       296      169      127   42.9%   USDA 
AS577        314      193      121   38.5%   Bell Advanced Communications Inc.
AS4293       379      270      109   28.8%   Cable & Wireless USA 
AS6595       166       59      107   64.5%   DoD Education Activity Network As
AS705        249      152       97   39.0%   UUNET Technologies, Inc. 
AS7018       769      672       97   12.6%   AT&T 
AS6429       196      101       95   48.5%   AT&T Chile Internet S.A. 
AS13999      109       15       94   86.2%   Mega Cable S.A. de C.V. 
AS2048       212      120       92   43.4%   State of Louisiana 
AS16473      154       65       89   57.8%   Bell South 
AS4755       210      124       86   41.0%   Videsh Sanchar Nigam Ltd. Autonom
AS12302       98       28       70   71.4%   MobiFon S.A.
AS4200       142       74       68   47.9%   Apex Global Information Services,
AS1239       465      398       67   14.4%   Sprint 
AS7046       317      252       65   20.5%   UUNET Technologies, Inc. 
AS6471       127       62       65   51.2%   ENTEL CHILE S.A. 
AS724        218      155       63   28.9%   DLA Systems Automation Center 
AS17557      125       65       60   48.0%   Pakistan Telecom
AS19632       67        9       58   86.6%   Metropolis Intercom S.A. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS209        313      258       55   17.6%   Qwest 
AS703        301      249       52   17.3%   UUNET Technologies, Inc. 
AS3464       147       95       52   35.4%   Alabama SuperComputer Network 
AS226        145       93       52   35.9%   Los Nettos 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS1          535      484       51    9.5%   BBN Planet 
AS4323       249      199       50   20.1%   Time Warner Communications, Inc. 
AS10620       67       20       47   70.1%   TVCABLE BOGOTA 


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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