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The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 18 15:20:23 1998

This is an auto-generated mail on Fri Dec 18 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 18Dec98


0) General Status

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

Date	Prefixes
111298	54438
121298	54337
131298	54282
141298	54446
151298	54647
161298	54628
171298	54720
181298	54712

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:                 4332

Number of ASes announcing only one prefix:        2126 (1136 cidr, 990 classful)

Largest number of  cidr routes:                    358 announced by AS3561
Largest number of classful routes:                 991 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 18Dec98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        390      148      242   62.1%   BCnet Backbone
AS3749       229       70      159   69.4%   TECNET
AS2493       326      179      147   45.1%   iSTAR Internet, Inc.
AS1785       541      403      138   25.5%   NYSERNet Backbone
AS701        991      855      136   13.7%   Alternet
AS174        676      549      127   18.8%   Performance Systems International
AS5668       133       36       97   72.9%   Century Telephone Inc.
AS4200       191       98       93   48.7%   AGIS (Apex Global Information Ser
AS1267       109       30       79   72.5%   IUNET-AS
AS4293       207      135       72   34.8%   IMCI
AS4755       133       62       71   53.4%   Videsh Sanchar Nigam Ltd. India
AS549        220      154       66   30.0%   ONet Backbone
AS4740       394      330       64   16.2%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517       128       71       57   44.5%   UNKNOWN
AS1221       384      328       56   14.6%   AARNET-AS
AS7046       247      194       53   21.5%   UUNET-CUSTOMER
AS7657       137       86       51   37.2%   The Internet Group Limited
AS7545       116       66       50   43.1%   TPG Internet Pty Ltd
AS1239       532      483       49    9.2%   SprintLink Backbone
AS72          88       40       48   54.5%   Schlumberger Information Network
AS7496        74       29       45   60.8%   Power Up
AS577        208      163       45   21.6%   Bell Canada Backbone
AS3221        84       42       42   50.0%   RIPE-ASNBLOCK4
AS10928       90       49       41   45.6%   UNKNOWN
AS852        172      133       39   22.7%   AGT Advance Communication
AS719        440      403       37    8.4%   LANLINK-AS
AS803         71       35       36   50.7%   SaskNet Backbone
AS7122       111       76       35   31.5%   MTS ADVANCED Network Policy
AS3564        69       36       33   47.8%   Microserve Infromation Systems In
AS2707        65       32       33   50.8%   WEC


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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