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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jun 09 02:04:57 2001


This is an auto-generated mail on Fri Jun  8 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      A summary of the last weeks changes in terms of withdrawn and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 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 08Jun01


0) General Status

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

Date	Prefixes
010601	102687
020601	102235
030601	102123
040601	102282
050601	102182
060601	102174
070601	102400
080601	102522

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:                10948

Number of ASes announcing only one prefix:        6480 (3676 cidr, 2804 classful)

Largest number of  cidr routes:                   1185 announced by  AS705
Largest number of classful routes:                1427 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 08Jun01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1390     1031      359   25.8%   TELSTRA-AS
AS1          599      540       59    9.8%   GTE Internetworking
AS1239       458      401       57   12.4%   SprintLink Backbone
AS13544       69       19       50   72.5%   autonomous system number assigned
AS11774       73       27       46   63.0%   AS 11774 Object
AS1267        68       26       42   61.8%   Infostrada S.p.A.
AS1237        96       54       42   43.8%   KISTI
AS12235       48        7       41   85.4%   Cove Software Systems Inc
AS12302       67       28       39   58.2%   MobiFon S.A.
AS10620       54       17       37   68.5%   autonomous system number assigned
AS13345       66       33       33   50.0%   autonomous system number assigned
AS11311       42        9       33   78.6%   autonomous system number assigned
AS12064       34        2       32   94.1%   autonomous system number assigned
AS11859       45       13       32   71.1%   autonomous system number assigned
AS12497       32        1       31   96.9%   SA*Net Network - AS
AS12067       32        1       31   96.9%   autonomous system number assigned
AS12062       34        3       31   91.2%   autonomous system number assigned
AS11606       43       12       31   72.1%   autonomous system number assigned
AS11418       45       16       29   64.4%   autonomous system number assigned
AS11371       75       47       28   37.3%   Rhythms
AS10733       35        7       28   80.0%   Matrix Internet
AS11507       80       53       27   33.8%   TouchAmerica Montana
AS10722       58       31       27   46.6%   Aluminum Co. of America
AS12709       32        6       26   81.2%   Melita Cable Autonomous System
AS12564       31        5       26   83.9%   Bulgarian Government Autonomous S
AS11781       31        5       26   83.9%   autonomous system number assigned
AS11686      119       93       26   21.8%   Education Networks of America
AS11367       31        5       26   83.9%   autonomous system number assigned
AS11170       28        3       25   89.3%   autonomous system number assigned
AS11139       70       45       25   35.7%   Regional IP Network


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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