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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jul 23 15:05:31 1999


This is an auto-generated mail on Fri Jul 23 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      A summary of the last weeks changes in terms of withdrawn and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 23Jul99


0) General Status

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

Date	Prefixes
160799	61126
170799	61270
180799	60986
190799	61251
200799	61293
210799	61468
220799	61453
230799	61494

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:                 5334

Number of ASes announcing only one prefix:        2793 (1543 cidr, 1250 classful)

Largest number of  cidr routes:                    445 announced by  AS701
Largest number of classful routes:                 847 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 23Jul99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        348      145      203   58.3%   BCnet Backbone
AS2609       122       28       94   77.0%   EUnet-TN
AS577        281      188       93   33.1%   Bell Canada Backbone
AS174        573      481       92   16.1%   Performance Systems International
AS3749       152       63       89   58.6%   TECNET
AS4293       235      149       86   36.6%   IMCI
AS7046       320      238       82   25.6%   UUNET-CUSTOMER
AS1221       505      429       76   15.0%   TELSTRA-AS
AS7545       141       66       75   53.2%   TPG Internet Pty Ltd
AS7496       108       34       74   68.5%   Power Up
AS7657       221      150       71   32.1%   The Internet Group Limited
AS10928      119       49       70   58.8%   UNKNOWN
AS4200       167      105       62   37.1%   AGIS (Apex Global Information Ser
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4740       307      252       55   17.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS4755       133       79       54   40.6%   Videsh Sanchar Nigam Ltd. India
AS9269        73       22       51   69.9%   Hong Kong CTI
AS719        458      407       51   11.1%   LANLINK autonomous system
AS684         89       44       45   50.6%   Manitoba Regional Network Backbon
AS803         78       34       44   56.4%   SaskNet Backbone
AS549        218      174       44   20.2%   ONet Backbone
AS2493       112       69       43   38.4%   iSTAR Internet, Inc.
AS3737       106       68       38   35.8%   PenTeleData Inc. (ASN-PTD)
AS1785       251      214       37   14.7%   NYSERNet Backbone
AS1          490      455       35    7.1%   BBNPLANET
AS701        847      813       34    4.0%   Alternet
AS10724       42        8       34   81.0%   UNKNOWN
AS6762        33        2       31   93.9%   Telecom Italia international high
AS4307        32        1       31   96.9%   SVINET-1
AS11515       32        1       31   96.9%   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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