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The Cidr Report

  • From: Tony Bates
  • Date: Fri Mar 12 15:02:28 1999

This is an auto-generated mail on Fri Mar 12 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      A summary of the last weeks changes in terms of withdrawn and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 12Mar99


0) General Status

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

Date	Prefixes
050399	56665
060399	56702
070399	56723
080399	56793
090399	56901
100399	56823
110399	57143
120399	56938

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


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

*** Bogus 123.217.230.0/24 from AS174
*** Bogus 124.188.32.0/19 from AS1239

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

Number of ASes in routing system:                 4654

Number of ASes announcing only one prefix:        2308 (1246 cidr, 1062 classful)

Largest number of  cidr routes:                    372 announced by  AS701
Largest number of classful routes:                 863 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 12Mar99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        358      146      212   59.2%   BCnet Backbone
AS2493       268      151      117   43.7%   iSTAR Internet, Inc.
AS174        645      530      115   17.8%   Performance Systems International
AS11305      116        8      108   93.1%   UNKNOWN
AS4755       158       76       82   51.9%   Videsh Sanchar Nigam Ltd. India
AS3749       138       62       76   55.1%   TECNET
AS4293       210      139       71   33.8%   IMCI
AS1267        94       24       70   74.5%   IUNET-AS
AS4200       162       96       66   40.7%   AGIS (Apex Global Information Ser
AS7496        95       31       64   67.4%   Power Up
AS7545       109       46       63   57.8%   TPG Internet Pty Ltd
AS4740       386      323       63   16.3%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221       423      362       61   14.4%   AARNET-AS
AS7046       266      206       60   22.6%   UUNET-CUSTOMER
AS1239       516      459       57   11.0%   SprintLink Backbone
AS10928      106       51       55   51.9%   UNKNOWN
AS72          90       38       52   57.8%   Schlumberger Information Network
AS7657       153      102       51   33.3%   The Internet Group Limited
AS3493       228      177       51   22.4%   INTERLINK
AS577        222      172       50   22.5%   Bell Canada Backbone
AS719        453      406       47   10.4%   LANLINK autonomous system
AS5674        79       35       44   55.7%   PBI-NET-BLK
AS852        175      135       40   22.9%   AGT Advance Communication
AS803         73       37       36   49.3%   SaskNet Backbone
AS701        863      827       36    4.2%   Alternet
AS7745        39        4       35   89.7%   BIGSKY-AS
AS7122       111       78       33   29.7%   MTS ADVANCED Network Policy
AS1785       248      216       32   12.9%   NYSERNet Backbone
AS1          508      476       32    6.3%   BBNPLANET
AS7390        36        5       31   86.1%   NLSLAN


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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