The Cidr Report

Tony Bates tbates at cisco.com
Sat Mar 17 07:00:02 UTC 2001



This is an auto-generated mail on Fri Mar 16 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      A summary of the last weeks changes in terms of withdrawn and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 16Mar01


0) General Status

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

Date	Prefixes
090301	98107
100301	97522
110301	97508
120301	97530
130301	97798
140301	98013
150301	98259
160301	97900

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


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

*** Bogus 91.16.23.0/24 from AS11770

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

Number of ASes in routing system:                10240

Number of ASes announcing only one prefix:        6004 (3405 cidr, 2599 classful)

Largest number of  cidr routes:                    957 announced by  AS701
Largest number of classful routes:                1594 announced by AS1221



1) Gains by aggregating at the origin AS level

 --- 16Mar01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1594     1194      400   25.1%   Telstra Pty Ltd
AS701       1417     1256      161   11.4%   UUNET Technologies, Inc. 
AS6499       170       60      110   64.7%   Brooks Fiber Properties, Inc. 
AS9269       162       53      109   67.3%   Internet service Provider in Hong
AS6429       212      107      105   49.5%   RdC Internet 
AS6595       161       62       99   61.5%   DoD Education Activity Network As
AS7545       169       76       93   55.0%   TPG Internet Pty Ltd
AS705        329      237       92   28.0%   UUNET Technologies, Inc. 
AS4293       376      285       91   24.2%   Cable & Wireless USA 
AS13999      102       11       91   89.2%   Mega Cable S.A. de C.V. 
AS8013       326      242       84   25.8%   PSINet Ltd. Canada 
AS7018       654      575       79   12.1%   AT&T 
AS4151       226      148       78   34.5%   USDA 
AS4755       207      133       74   35.7%   Videsh Sanchar Nigam Ltd. Autonom
AS577        239      169       70   29.3%   Bell Advanced Communications Inc.
AS724        222      155       67   30.2%   DLA Systems Automation Center 
AS174        495      428       67   13.5%   PSINet Inc. 
AS9498        83       18       65   78.3%   BHARTI BT INTERNET LTD.
AS5106       101       37       64   63.4%   Ameritech Advanced Data Services,
AS11170       64        1       63   98.4%   Bewell Net 
AS3749       120       59       61   50.8%   Tennessee Board of Regents 
AS3464       153       92       61   39.9%   Alabama SuperComputer Network 
AS7657       163      103       60   36.8%   The Internet Group Limited
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 
AS1          605      550       55    9.1%   BBN Planet 
AS6471        99       46       53   53.5%   ENTEL CHILE S.A. 


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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