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The Cidr Report

  • From: Tony Bates
  • Date: Fri Feb 05 15:20:56 1999

This is an auto-generated mail on Fri Feb  5 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 05Feb99


0) General Status

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

Date	Prefixes
290199	55694
300199	55734
310199	55712
010299	55847
020299	55793
030299	55899
040299	55881
050299	55641

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:                 4500

Number of ASes announcing only one prefix:        2232 (1187 cidr, 1045 classful)

Largest number of  cidr routes:                    353 announced by  AS701
Largest number of classful routes:                 881 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 05Feb99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        386      140      246   63.7%   BCnet Backbone
AS2493       315      169      146   46.3%   iSTAR Internet, Inc.
AS174        656      541      115   17.5%   Performance Systems International
AS11305      115       13      102   88.7%   UNKNOWN
AS3749       158       66       92   58.2%   TECNET
AS1267       111       30       81   73.0%   IUNET-AS
AS4755       152       72       80   52.6%   Videsh Sanchar Nigam Ltd. India
AS4293       211      140       71   33.6%   IMCI
AS7046       273      207       66   24.2%   UUNET-CUSTOMER
AS4200       161       99       62   38.5%   AGIS (Apex Global Information Ser
AS4740       389      328       61   15.7%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221       405      345       60   14.8%   AARNET-AS
AS701        881      825       56    6.4%   Alternet
AS1239       529      474       55   10.4%   SprintLink Backbone
AS7657       142       90       52   36.6%   The Internet Group Limited
AS72          89       37       52   58.4%   Schlumberger Information Network
AS7545       109       58       51   46.8%   TPG Internet Pty Ltd
AS10928      100       50       50   50.0%   UNKNOWN
AS7496        77       28       49   63.6%   Power Up
AS577        221      172       49   22.2%   Bell Canada Backbone
AS719        452      407       45   10.0%   LANLINK autonomous system
AS3221        84       42       42   50.0%   EENet Autonomous System
AS852        173      135       38   22.0%   AGT Advance Communication
AS803         72       36       36   50.0%   SaskNet Backbone
AS6897        64       28       36   56.2%   Global-One Spain
AS7745        39        4       35   89.7%   BIGSKY-AS
AS7122       112       77       35   31.2%   MTS ADVANCED Network Policy
AS6332        98       64       34   34.7%   TELNOR
AS2764       334      301       33    9.9%   connect.com.au pty ltd
AS4307        32        1       31   96.9%   SVINET-1


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