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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 01 15:06:23 1999


This is an auto-generated mail on Fri Oct  1 12:00:00 PDT 1999
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      A summary of the last weeks changes in terms of withdrawn and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 01Oct99


0) General Status

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

Date	Prefixes
060999	63135
070999	63155
080999	62994
270999	64154
280999	63958
290999	64074
300999	64030
011099	64019

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:                 5723

Number of ASes announcing only one prefix:        2996 (1637 cidr, 1359 classful)

Largest number of  cidr routes:                    556 announced by  AS701
Largest number of classful routes:                 910 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 01Oct99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      146      237   61.9%   BCnet Backbone
AS2609       127       13      114   89.8%   EUnet-TN
AS1221       585      478      107   18.3%   TELSTRA-AS
AS9269       128       28      100   78.1%   Hong Kong CTI
AS174        589      494       95   16.1%   Performance Systems International
AS7046       337      250       87   25.8%   UUNET-CUSTOMER
AS4293       228      142       86   37.7%   Internal ASN for C&W
AS577        263      178       85   32.3%   Bell Canada Backbone
AS7545       141       61       80   56.7%   TPG Internet Pty Ltd
AS7657       244      167       77   31.6%   The Internet Group Limited
AS7496       109       33       76   69.7%   Power Up
AS6944        92       16       76   82.6%   RapidSite, Inc.
AS3749       139       64       75   54.0%   TECNET
AS4200       181      109       72   39.8%   AGIS (Apex Global Information Ser
AS719        464      408       56   12.1%   LANLINK autonomous system
AS4740       342      288       54   15.8%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS2493       138       91       47   34.1%   iSTAR Internet, Inc.
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS209        296      250       46   15.5%   Qwest Communications
AS6528        45        7       38   84.4%   WORLD-LYNX
AS549        200      162       38   19.0%   ONet Backbone
AS4755       112       76       36   32.1%   Videsh Sanchar Nigam Ltd. India
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)
AS701        910      878       32    3.5%   Alternet
AS9453        33        2       31   93.9%   Soongsil University
AS7745        40        9       31   77.5%   BIGSKY-AS
AS4307        32        1       31   96.9%   SVINET-1
AS1785       234      203       31   13.2%   NYSERNet Backbone
AS10479       40        9       31   77.5%   ITESM-Rectoria Zona Norte
AS1          489      458       31    6.3%   GTE Internetworking


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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