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The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 26 15:44:30 1997

This is an auto-generated mail on Fri Dec 26 12:00:00 PST 1997
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      A summary of the last weeks changes in terms of withdrawn and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 26Dec97


0) General Status

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

Date	Prefixes
191297	46949
201297	46969
211297	46910
221297	46996
231297	47516
241297	47566
251297	47463
261297	47433

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:                 1662

Number of ASes announcing only one prefix:         778 (143 cidr, 635 classful)

Largest number of  cidr routes:                    121 announced by AS3561
Largest number of classful routes:                 583 announced by    AS1



1) Gains by aggregating at the origin AS level

 --- 26Dec97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       201      102       99   49.3%   IMCI
AS72          84       36       48   57.1%   Schlumberger Information Network
AS719        505      460       45    8.9%   LANLINK autonomous system
AS174        298      258       40   13.4%   Performance Systems International
AS271         80       46       34   42.5%   BCnet Backbone
AS1          583      551       32    5.5%   BBNPLANET
AS1257       296      265       31   10.5%   SWIPnet Swedish IP Network
AS701        473      443       30    6.3%   Alternet
AS2493        97       73       24   24.7%   iSTAR Internet, Inc.
AS5381        58       36       22   37.9%   PowerTech Information Systems AS
AS8517        75       55       20   26.7%   ULAKNET-ASN
AS6822        37       19       18   48.6%   SuperOnline autonomous system
AS6663        35       17       18   51.4%   InterComp Bucharest
AS3663        25        7       18   72.0%   NETNET-NET
AS3563        59       41       18   30.5%   Pilot Network Services, Inc.
AS2048        45       28       17   37.8%   LaNet
AS2561        36       20       16   44.4%   Egyptian Networks
AS6897        32       17       15   46.9%   Global-One Spain
AS3564        29       15       14   48.3%   Microserve Infromation Systems In
AS2907       110       96       14   12.7%   SINET
AS1239       268      254       14    5.2%   SprintLink Backbone
AS6846        30       17       13   43.3%   UKRPACK.NET
AS1785       162      149       13    8.0%   NYSERNet Backbone
AS5666        35       23       12   34.3%   Omnes - A Schlumberger and Cable 
AS4000        74       62       12   16.2%   Global IP
AS2752        38       26       12   31.6%   THOMSONCA-AS
AS549         93       82       11   11.8%   ONet Backbone
AS3577        30       19       11   36.7%   PREPnet-WEST
AS2686        46       35       11   23.9%   Autonomous System number for IBM 
AS816         54       44       10   18.5%   UUNET Canada (ASN-UUNETCA-AS4)


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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