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The Cidr Report

  • From: Tony Bates
  • Date: Mon Feb 12 00:17:54 2001


This is an auto-generated mail on Sun Feb 11 20:37:22 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      A summary of the last weeks changes in terms of withdrawn and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 11Feb01


0) General Status

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

Date	Prefixes
040201	96815
050201	96681
060201	96726
070201	96978
080201	97041
090201	97137
100201	96880
110201	96509

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
*** Bogus 103.22.7.0/24 from AS9768

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

Number of ASes in routing system:                 9849

Number of ASes announcing only one prefix:        5760 (3266 cidr, 2494 classful)

Largest number of  cidr routes:                    957 announced by  AS701
Largest number of classful routes:                1642 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 11Feb01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1623     1207      416   25.6%   Telstra Pty Ltd
AS701       1642     1451      191   11.6%   UUNET Technologies, Inc. 
AS271        280      132      148   52.9%   University of British Columbia 
AS7545       196       71      125   63.8%   ASNBLK-APNIC-AS-2-BLOCK
AS9269       162       46      116   71.6%   ASNBLK-APNIC-AS-3-BLOCK
AS6429       221      108      113   51.1%   RdC Internet 
AS6595       163       62      101   62.0%   DoD Education Activity Network As
AS8013       434      336       98   22.6%   PSINet Ltd. Canada 
AS13999      107       10       97   90.7%   Mega Cable S.A. de C.V. 
AS4293       374      281       93   24.9%   Cable & Wireless USA 
AS7496       104       23       81   77.9%   ASNBLK-APNIC-AS-2-BLOCK
AS4151       250      169       81   32.4%   USDA 
AS705        312      234       78   25.0%   UUNET Technologies, Inc. 
AS4755       209      137       72   34.4%   Videsh Sanchar Nigam Ltd. Autonom
AS1942       137       65       72   52.6%   FR-CICG-GRENOBLE
AS7018       615      544       71   11.5%   AT&T 
AS7046       325      255       70   21.5%   UUNET Technologies, Inc. 
AS577        236      167       69   29.2%   Bell Advanced Communications Inc.
AS174        499      431       68   13.6%   PSINet Inc. 
AS1727       162       94       68   42.0%   Commander Naval Surface force US 
AS9498        88       21       67   76.1%   BHARTI BT INTERNET LTD.
AS724        219      152       67   30.6%   DLA Systems Automation Center 
AS5106       101       37       64   63.4%   Ameritech Advanced Data Services,
AS3464       153       92       61   39.9%   Alabama SuperComputer Network 
AS7657       185      125       60   32.4%   ASNBLK-APNIC-AS-2-BLOCK
AS226        155       95       60   38.7%   Los Nettos 
AS3749       115       57       58   50.4%   Tennessee Board of Regents 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS6413        67       11       56   83.6%   Southern Online Systems, Inc. 
AS376        131       75       56   42.7%   Reseau Interordinateurs Scientiqu


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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