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The Cidr Report

  • From: Tony Bates
  • Date: Sat Feb 24 02:11:22 2001


This is an auto-generated mail on Fri Feb 23 23:00:02 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      A summary of the last weeks changes in terms of withdrawn and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 23Feb01


0) General Status

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

Date	Prefixes
110201	96509
120201	96907
200201	96086
200201	96219
200201	96217
210201	96188
220201	96107
230201	96158

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:                10023

Number of ASes announcing only one prefix:        5876 (3327 cidr, 2549 classful)

Largest number of  cidr routes:                    959 announced by  AS701
Largest number of classful routes:                1714 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 23Feb01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS701       1714     1502      212   12.4%   UUNET Technologies, Inc. 
AS1221       640      487      153   23.9%   Telstra Pty Ltd
AS8006       145       19      126   86.9%   Systems & Software Consortium, In
AS7545       193       73      120   62.2%   TPG Internet Pty Ltd
AS9269       163       52      111   68.1%   Internet service Provider in Hong
AS13999      109        7      102   93.6%   Mega Cable S.A. de C.V. 
AS6595       161       62       99   61.5%   DoD Education Activity Network As
AS4293       380      287       93   24.5%   Cable & Wireless USA 
AS6429       192      101       91   47.4%   RdC Internet 
AS271        197      107       90   45.7%   University of British Columbia 
AS8013       330      244       86   26.1%   PSINet Ltd. Canada 
AS705        329      243       86   26.1%   UUNET Technologies, Inc. 
AS7496       103       22       81   78.6%   Power Up
AS4755       207      127       80   38.6%   Videsh Sanchar Nigam Ltd. Autonom
AS4151       242      166       76   31.4%   USDA 
AS1942       136       64       72   52.9%   FR-CICG-GRENOBLE
AS7018       631      560       71   11.3%   AT&T 
AS577        235      166       69   29.4%   Bell Advanced Communications Inc.
AS7046       322      254       68   21.1%   UUNET Technologies, Inc. 
AS5106       101       37       64   63.4%   Ameritech Advanced Data Services,
AS724        220      157       63   28.6%   DLA Systems Automation Center 
AS1727       156       93       63   40.4%   Commander Naval Surface force US 
AS11170       64        1       63   98.4%   Bewell Net 
AS3464       154       92       62   40.3%   Alabama SuperComputer Network 
AS174        483      421       62   12.8%   PSINet Inc. 
AS3749       118       59       59   50.0%   Tennessee Board of Regents 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS6413        67       11       56   83.6%   Southern Online Systems, Inc. 
AS376        132       76       56   42.4%   Reseau Interordinateurs Scientiqu
AS226        148       92       56   37.8%   Los Nettos 


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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