The Cidr Report

Tony Bates tbates at cisco.com
Fri Aug 20 19:00:03 UTC 1999


This is an auto-generated mail on Fri Aug 20 12:00:00 PDT 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      A summary of the last weeks changes in terms of withdrawn and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 20Aug99


0) General Status

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

Date	Prefixes
130899	63211
140899	63141
150899	62759
160899	63207
170899	63568
180899	62556
190899	62479
200899	62592

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:                 5048

Number of ASes announcing only one prefix:        2612 (1328 cidr, 1284 classful)

Largest number of  cidr routes:                    445 announced by  AS701
Largest number of classful routes:                 835 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 20Aug99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        335      145      190   56.7%   BCnet Backbone
AS2609       127       13      114   89.8%   EUnet-TN
AS1221       555      455      100   18.0%   TELSTRA-AS
AS577        290      196       94   32.4%   Bell Canada Backbone
AS174        574      480       94   16.4%   Performance Systems International
AS4293       235      145       90   38.3%   IMCI
AS7046       319      234       85   26.6%   UUNET-CUSTOMER
AS7657       237      160       77   32.5%   The Internet Group Limited
AS7545       140       65       75   53.6%   TPG Internet Pty Ltd
AS4200       176      101       75   42.6%   AGIS (Apex Global Information Ser
AS3749       139       64       75   54.0%   TECNET
AS209        318      243       75   23.6%   Qwest Communications
AS7496       108       34       74   68.5%   Power Up
AS10928      118       48       70   59.3%   UNKNOWN
AS9269        88       19       69   78.4%   Hong Kong CTI
AS1785       372      311       61   16.4%   NYSERNet Backbone
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4755       136       79       57   41.9%   Videsh Sanchar Nigam Ltd. India
AS4740       359      304       55   15.3%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS719        462      410       52   11.3%   LANLINK autonomous system
AS2493       156      107       49   31.4%   iSTAR Internet, Inc.
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS549        209      169       40   19.1%   ONet Backbone
AS3737       102       65       37   36.3%   PenTeleData Inc. (ASN-PTD)
AS1          506      469       37    7.3%   BBNPLANET
AS10724       42        8       34   81.0%   UNKNOWN
AS4307        32        1       31   96.9%   SVINET-1
AS10479       40        9       31   77.5%   ITESM-Rectoria Zona Norte
AS8023        43       13       30   69.8%   CASTLES
AS7745        38        8       30   78.9%   BIGSKY-AS


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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