The Cidr Report

Sat Mar 24 07:00:02 UTC 2001

This is an auto-generated mail on Fri Mar 23 23:00:00 PST 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.

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      A summary of the last weeks changes in terms of withdrawn and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 xara.net for giving me access to their routing tables once a
day. 

Please send any comments about this report directly to me.

Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.

------------------------------------------------------------------------------

                        CIDR REPORT for 23Mar01

0) General Status

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

Date	Prefixes
160301	97900
170301	98013
180301	97932
190301	97895
200301	97452
210301	97740
220301	97971
230301	98100

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:                 6535

Number of ASes announcing only one prefix:        2606 (0 cidr, 2606 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                1521 announced by AS1221

1) Gains by aggregating at the origin AS level

 --- 23Mar01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1521     1147      374   24.6%   Telstra Pty Ltd
AS701       1433     1266      167   11.7%   UUNET Technologies, Inc. 
AS9269       162       53      109   67.3%   Internet service Provider in Hong
AS6595       165       63      102   61.8%   DoD Education Activity Network As
AS6429       209      109      100   47.8%   RdC Internet 
AS4151       255      156       99   38.8%   USDA 
AS13999      104        8       96   92.3%   Mega Cable S.A. de C.V. 
AS705        334      241       93   27.8%   UUNET Technologies, Inc. 
AS4293       367      279       88   24.0%   Cable & Wireless USA 
AS8013       317      233       84   26.5%   PSINet Ltd. Canada 
AS7018       663      584       79   11.9%   AT&T 
AS4755       211      136       75   35.5%   Videsh Sanchar Nigam Ltd. Autonom
AS577        234      165       69   29.5%   Bell Advanced Communications Inc.
AS5106       101       37       64   63.4%   Ameritech Advanced Data Services,
AS3464       153       91       62   40.5%   Alabama SuperComputer Network 
AS724        211      150       61   28.9%   DLA Systems Automation Center 
AS3749       119       60       59   49.6%   Tennessee Board of Regents 
AS9498        74       17       57   77.0%   BHARTI BT INTERNET LTD.
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS6413        67       11       56   83.6%   Southern Online Systems, Inc. 
AS4323       233      177       56   24.0%   Time Warner Communications, Inc. 
AS376        133       77       56   42.1%   Reseau Interordinateurs Scientiqu
AS226        149       93       56   37.6%   Los Nettos 
AS174        460      404       56   12.2%   PSINet Inc. 
AS11170       60        4       56   93.3%   Bewell Net 
AS7568        83       28       55   66.3%   C.S. Communications Co., Ltd.
AS1          604      550       54    8.9%   BBN Planet 
AS6471        99       46       53   53.5%   ENTEL CHILE S.A. 
AS11252       89       36       53   59.6%   ISU Computer Center Bldg. 5 
AS7657       140       89       51   36.4%   The Internet Group Limited

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