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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jun 30 02:05:37 2001


This is an auto-generated mail on Fri Jun 29 23:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 29Jun01


0) General Status

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

Date	Prefixes
220601	101078
230601	100823
240601	100985
250601	101071
260601	101116
270601	100751
280601	100644
290601	100654

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:                11095

Number of ASes announcing only one prefix:        6545 (3732 cidr, 2813 classful)

Largest number of  cidr routes:                   1029 announced by  AS701
Largest number of classful routes:                1429 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 29Jun01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1366     1019      347   25.4%   TELSTRA-AS
AS701       1429     1216      213   14.9%   Alternet
AS4293       398      283      115   28.9%   part of AS assignment AS4287 - AS
AS6595       157       58       99   63.1%   DoD Education Activity Network As
AS705        237      141       96   40.5%   part of AS assignment AS701 - AS7
AS6429       202      107       95   47.0%   ATT LA Internet Chile
AS7018       734      648       86   11.7%   AT&T WorldNet Service Backbone
AS4755       211      129       82   38.9%   Videsh Sanchar Nigam Ltd. Autonom
AS4151       159       77       82   51.6%   part of AS assignment AS4151 - AS
AS8013       300      220       80   26.7%   PSINet Ltd. Canada 
AS13999       98       18       80   81.6%   Mega Cable S.A. de C.V. 
AS577        246      173       73   29.7%   Bell Advanced Communications Inc.
AS724        238      166       72   30.3%   part of AS assignment AS721 - AS7
AS6471       113       50       63   55.8%   ENTEL CHILE S.A. 
AS7046       306      245       61   19.9%   UUNET Technologies, Inc. 
AS3464       151       90       61   40.4%   Alabama Research and Education Ne
AS1          585      526       59   10.1%   GTE Internetworking
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS1239       446      391       55   12.3%   SprintLink Backbone
AS226        144       91       53   36.8%   Los Nettos
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS3908       207      155       52   25.1%   Supernet, Inc.
AS17561      112       61       51   45.5%   Internet service provision to Wes
AS9842        54        5       49   90.7%   Lotte Data Communication Company
AS852        211      163       48   22.7%   Telus Advanced Communications 
AS5106        82       34       48   58.5%   Ameritech Advanced Data Services,
AS2149       300      252       48   16.0%   PSINET-2
AS15290      237      190       47   19.8%   AT&T Canada IES
AS855        143       97       46   32.2%   part of AS assignment AS853 - AS1
AS3602       226      180       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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