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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jul 07 02:05:14 2001


This is an auto-generated mail on Fri Jul  6 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      A summary of the last weeks changes in terms of withdrawn and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 06Jul01


0) General Status

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

Date	Prefixes
290601	100654
300601	101008
010701	100929
020701	100843
030701	101022
040701	101049
050701	100922
060701	101036

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:                11154

Number of ASes announcing only one prefix:        6601 (3771 cidr, 2830 classful)

Largest number of  cidr routes:                   1007 announced by  AS701
Largest number of classful routes:                1423 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 06Jul01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1342     1000      342   25.5%   UNKNOWN
AS701       1423     1209      214   15.0%   UNKNOWN
AS4293       394      282      112   28.4%   UNKNOWN
AS6595       158       57      101   63.9%   UNKNOWN
AS7018       743      651       92   12.4%   UNKNOWN
AS6429       201      109       92   45.8%   UNKNOWN
AS705        225      134       91   40.4%   UNKNOWN
AS4755       207      122       85   41.1%   UNKNOWN
AS4151       159       77       82   51.6%   UNKNOWN
AS8013       298      218       80   26.8%   UNKNOWN
AS13999       94       15       79   84.0%   UNKNOWN
AS724        246      172       74   30.1%   UNKNOWN
AS577        247      174       73   29.6%   UNKNOWN
AS6471       118       55       63   53.4%   UNKNOWN
AS3464       152       90       62   40.8%   UNKNOWN
AS7046       306      245       61   19.9%   UNKNOWN
AS1          584      524       60   10.3%   UNKNOWN
AS16758       63        6       57   90.5%   UNKNOWN
AS1239       446      391       55   12.3%   UNKNOWN
AS226        144       91       53   36.8%   UNKNOWN
AS6413        65       13       52   80.0%   UNKNOWN
AS3908       205      154       51   24.9%   UNKNOWN
AS17561      112       61       51   45.5%   UNKNOWN
AS852        211      161       50   23.7%   UNKNOWN
AS2149       323      273       50   15.5%   UNKNOWN
AS9842        54        5       49   90.7%   UNKNOWN
AS12302       79       30       49   62.0%   MobiFon S.A.
AS5106        81       33       48   59.3%   UNKNOWN
AS15290      237      191       46   19.4%   UNKNOWN
AS3602       221      176       45   20.4%   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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