The Cidr Report

Tony Bates tbates at cisco.com
Fri Aug 13 19:00:02 UTC 1999


This is an auto-generated mail on Fri Aug 13 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      A summary of the last weeks changes in terms of withdrawn and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 13Aug99


0) General Status

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

Date	Prefixes
060899	61906
070899	61697
080899	61812
090899	61912
100899	62034
110899	62198
120899	63033
130899	63211

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:                 5428

Number of ASes announcing only one prefix:        2841 (1563 cidr, 1278 classful)

Largest number of  cidr routes:                    472 announced by  AS701
Largest number of classful routes:                 993 announced by AS1890



1) Gains by aggregating at the origin AS level

 --- 13Aug99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1890       993      436      557   56.1%   UUNET NL Autonomous System
AS271        343      148      195   56.9%   BCnet Backbone
AS2609       124       20      104   83.9%   EUnet-TN
AS1221       541      444       97   17.9%   TELSTRA-AS
AS174        577      483       94   16.3%   Performance Systems International
AS577        286      193       93   32.5%   Bell Canada Backbone
AS7046       323      236       87   26.9%   UUNET-CUSTOMER
AS4293       235      148       87   37.0%   IMCI
AS4200       183      104       79   43.2%   AGIS (Apex Global Information Ser
AS7657       235      159       76   32.3%   The Internet Group Limited
AS209        323      247       76   23.5%   Qwest Communications
AS7545       141       66       75   53.2%   TPG Internet Pty Ltd
AS3749       139       64       75   54.0%   TECNET
AS7496       108       34       74   68.5%   Power Up
AS10928      118       48       70   59.3%   UNKNOWN
AS9269        85       20       65   76.5%   Hong Kong CTI
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4755       137       80       57   41.6%   Videsh Sanchar Nigam Ltd. India
AS4740       354      298       56   15.8%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS719        458      407       51   11.1%   LANLINK autonomous system
AS2493       156      107       49   31.4%   iSTAR Internet, Inc.
AS684         91       46       45   49.5%   Manitoba Regional Network Backbon
AS3737       105       65       40   38.1%   PenTeleData Inc. (ASN-PTD)
AS549        210      171       39   18.6%   ONet Backbone
AS1          499      463       36    7.2%   BBNPLANET
AS1785       242      209       33   13.6%   NYSERNet Backbone
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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