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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jun 16 02:05:04 2001


This is an auto-generated mail on Fri Jun 15 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      A summary of the last weeks changes in terms of withdrawn and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 15Jun01


0) General Status

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

Date	Prefixes
080601	102522
090601	102942
100601	102382
110601	102484
120601	102300
130601	102055
140601	101900
150601	101429

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:                 6880

Number of ASes announcing only one prefix:        2796 (0 cidr, 2796 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                1403 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 15Jun01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1392     1032      360   25.9%   UNKNOWN
AS701       1403     1217      186   13.3%   UNKNOWN
AS4293       396      281      115   29.0%   UNKNOWN
AS4151       252      137      115   45.6%   UNKNOWN
AS4755       256      142      114   44.5%   UNKNOWN
AS6429       207      102      105   50.7%   UNKNOWN
AS6595       159       59      100   62.9%   UNKNOWN
AS705        251      155       96   38.2%   UNKNOWN
AS13999      103       11       92   89.3%   UNKNOWN
AS8013       300      222       78   26.0%   UNKNOWN
AS577        254      179       75   29.5%   UNKNOWN
AS7018       700      628       72   10.3%   UNKNOWN
AS724        223      159       64   28.7%   UNKNOWN
AS6471       114       50       64   56.1%   UNKNOWN
AS3464       152       90       62   40.8%   UNKNOWN
AS1          597      538       59    9.9%   UNKNOWN
AS16758       63        6       57   90.5%   UNKNOWN
AS2149       333      277       56   16.8%   UNKNOWN
AS1239       439      384       55   12.5%   UNKNOWN
AS3908       207      154       53   25.6%   UNKNOWN
AS226        143       90       53   37.1%   UNKNOWN
AS6413        66       14       52   78.8%   UNKNOWN
AS5106        95       43       52   54.7%   UNKNOWN
AS17561      112       61       51   45.5%   UNKNOWN
AS3602       229      179       50   21.8%   UNKNOWN
AS13544       69       19       50   72.5%   UNKNOWN
AS9842        54        5       49   90.7%   UNKNOWN
AS852        209      160       49   23.4%   UNKNOWN
AS855        144       98       46   31.9%   UNKNOWN
AS3749        94       48       46   48.9%   UNKNOWN


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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