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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jun 23 02:04:58 2001


This is an auto-generated mail on Fri Jun 22 23:00:00 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.

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      A summary of the last weeks changes in terms of withdrawn and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 me.

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


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

                        CIDR REPORT for 22Jun01


0) General Status

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

Date	Prefixes
150601	101429
160601	101413
170601	101455
180601	101185
190601	101168
200601	101266
210601	101030
220601	101078

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:                11056

Number of ASes announcing only one prefix:        6521 (3719 cidr, 2802 classful)

Largest number of  cidr routes:                   1030 announced by  AS701
Largest number of classful routes:                1425 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 22Jun01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1363     1022      341   25.0%   TELSTRA-AS
AS701       1425     1226      199   14.0%   Alternet
AS4755       261      140      121   46.4%   Videsh Sanchar Nigam Ltd. Autonom
AS4293       398      283      115   28.9%   part of AS assignment AS4287 - AS
AS6595       157       58       99   63.1%   DoD Education Activity Network As
AS6429       203      105       98   48.3%   ATT LA Internet Chile
AS705        238      142       96   40.3%   part of AS assignment AS701 - AS7
AS13999      103       11       92   89.3%   Mega Cable S.A. de C.V. 
AS7018       725      642       83   11.4%   AT&T WorldNet Service Backbone
AS4151       158       77       81   51.3%   part of AS assignment AS4151 - AS
AS8013       293      218       75   25.6%   PSINet Ltd. Canada 
AS577        250      177       73   29.2%   Bell Advanced Communications Inc.
AS6471       114       51       63   55.3%   ENTEL CHILE S.A. 
AS3464       152       90       62   40.8%   Alabama Research and Education Ne
AS724        217      156       61   28.1%   part of AS assignment AS721 - AS7
AS7046       303      242       61   20.1%   UUNET Technologies, Inc. 
AS1          591      532       59   10.0%   GTE Internetworking
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS1239       445      390       55   12.4%   SprintLink Backbone
AS2149       326      272       54   16.6%   PSINET-2
AS3908       203      150       53   26.1%   Supernet, Inc.
AS226        143       90       53   37.1%   Los Nettos
AS6413        66       14       52   78.8%   Southern Online Systems, Inc. 
AS4323       236      184       52   22.0%   Time Warner Telecom Internet
AS5106        94       43       51   54.3%   Ameritech Advanced Data Services,
AS17561      112       61       51   45.5%   Internet service provision to Wes
AS9842        54        5       49   90.7%   Lotte Data Communication Company
AS852        209      161       48   23.0%   Telus Advanced Communications 
AS855        143       97       46   32.2%   part of AS assignment AS853 - AS1
AS3602       225      179       46   20.4%   Sprint Canada Inc.


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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