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The Cidr Report

  • From: Tony Bates
  • Date: Fri Apr 24 15:05:44 1998

This is an auto-generated mail on Fri Apr 24 12:00:00 PDT 1998
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      A summary of the last weeks changes in terms of withdrawn and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 24Apr98


0) General Status

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

Date	Prefixes
170498	51188
180498	51220
190498	51064
200498	51247
210498	51425
220498	51496
230498	51401
240498	51504

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:                 3488

Number of ASes announcing only one prefix:        1659 (861 cidr, 798 classful)

Largest number of  cidr routes:                    376 announced by AS3561
Largest number of classful routes:                1115 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 24Apr98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       657      413      244   37.1%   iSTAR Internet, Inc.
AS4293       441      217      224   50.8%   IMCI
AS816        670      461      209   31.2%   UUNET Canada (ASN-UUNETCA-AS4)
AS701       1115      939      176   15.8%   Alternet
AS3602       469      306      163   34.8%   Sprint Canada Inc.
AS3749       219       64      155   70.8%   TECNET
AS174        750      601      149   19.9%   Performance Systems International
AS8505       156       30      126   80.8%   Middle East Technical University 
AS7046       253      149      104   41.1%   UUNET-CUSTOMER
AS5668       119       45       74   62.2%   Century Telephone Inc.
AS2048       162       90       72   44.4%   LaNet
AS3221       110       41       69   62.7%   EENet Autonomous System
AS4755        97       29       68   70.1%   Videsh Sanchar Nigam Ltd. India
AS11003      127       59       68   53.5%   UNKNOWN
AS10928      104       44       60   57.7%   UNKNOWN
AS271        111       52       59   53.2%   BCnet Backbone
AS3804       200      142       58   29.0%   Bell Solutions
AS4313        67       14       53   79.1%   DELTANET
AS549        209      159       50   23.9%   ONet Backbone
AS1239       541      492       49    9.1%   SprintLink Backbone
AS72          84       36       48   57.1%   Schlumberger Information Network
AS1221       275      227       48   17.5%   AARNET-AS
AS6392        80       33       47   58.8%   MidWest Communications, Inc.
AS4763       123       76       47   38.2%   Telstra New Zealand
AS684         94       52       42   44.7%   Manitoba Regional Network Backbon
AS852        157      117       40   25.5%   AGT Advance Communication
AS4740       353      314       39   11.0%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS3493       164      126       38   23.2%   INTERLINK
AS4200       129       92       37   28.7%   AGIS (Apex Global Information Ser
AS803         72       36       36   50.0%   SaskNet Backbone


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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