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The Cidr Report

  • From: Tony Bates
  • Date: Sat Jun 20 02:12:44 1998

This is an auto-generated mail on Fri Jun 19 12:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 19Jun98


0) General Status

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

Date	Prefixes
120698	51404
130698	51272
140698	51351
150698	51499
160698	51736
170698	51866
180698	51372
190698	51379

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.


Possible Bogus Routes
---------------------

*** Bogus 213.102.1.0 from AS3259

AS Summary
----------

Number of ASes in routing system:                 3657

Number of ASes announcing only one prefix:        1769 (940 cidr, 829 classful)

Largest number of  cidr routes:                    353 announced by AS3561
Largest number of classful routes:                1129 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 19Jun98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       463      242      221   47.7%   IMCI
AS2493       494      286      208   42.1%   iSTAR Internet, Inc.
AS3602       507      310      197   38.9%   Sprint Canada Inc.
AS271        336      145      191   56.8%   BCnet Backbone
AS701       1129      941      188   16.7%   Alternet
AS3749       220       65      155   70.5%   TECNET
AS174        721      582      139   19.3%   Performance Systems International
AS3218        78        7       71   91.0%   AS-RSSI
AS3221       112       42       70   62.5%   EENet Autonomous System
AS5668       117       49       68   58.1%   Century Telephone Inc.
AS10928      109       43       66   60.6%   UNKNOWN
AS7046       206      141       65   31.6%   UUNET-CUSTOMER
AS4755       100       38       62   62.0%   Videsh Sanchar Nigam Ltd. India
AS3804       205      143       62   30.2%   Bell Solutions
AS3403       183      125       58   31.7%   TIAC
AS1221       294      239       55   18.7%   AARNET-AS
AS549        205      152       53   25.9%   ONet Backbone
AS4740       366      316       50   13.7%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS4200       149      100       49   32.9%   AGIS (Apex Global Information Ser
AS8517       120       72       48   40.0%   ULAKNET-ASN
AS72          85       37       48   56.5%   Schlumberger Information Network
AS4539        73       25       48   65.8%   NETROPOLIS
AS1239       542      495       47    8.7%   SprintLink Backbone
AS6335        67       24       43   64.2%   NTRNET
AS852        158      116       42   26.6%   AGT Advance Communication
AS719        443      404       39    8.8%   LANLINK autonomous system
AS762        116       79       37   31.9%   WELLFLEET-AS
AS6181        65       28       37   56.9%   FUSE-NET
AS803         72       36       36   50.0%   SaskNet Backbone
AS4763       108       72       36   33.3%   Telstra New Zealand


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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