The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Aug 25 06:00:03 UTC 2001



This is an auto-generated mail on Fri Aug 24 23:00:01 PDT 2001
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.

Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.

NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for
the regional version of this report.

NEW: Check http://www.employees.org/~tbates/autnums.html for a complete
list of autonomous system number to name mappings as used by the CIDR-Report.

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      A summary of the last weeks changes in terms of withdrawn and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 GX Networks for giving me access to their routing tables once a
day. 

Please send any comments about this report directly to CIDR Report <cidr-report at cisco.com>.



------------------------------------------------------------------------------

                        CIDR REPORT for 24Aug01


0) General Status

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

Date	Prefixes
170801	102866
180801	102777
190801	102782
200801	102807
210801	102870
220801	102815
230801	103148
240801	103170

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


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

*** Bogus 82.105.0.0/16 from AS3269
*** Bogus 82.105.128.0/17 from AS3269

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

Number of ASes in routing system:              11439

Number of ASes announcing only one prefix:      6806 (3880 cidr, 2926 classful)

Largest number of  cidr routes:                  843 announced by  AS701
Largest number of classful routes:              1396 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 24Aug01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1251      964      287   22.9%   Telstra Pty Ltd
AS701       1396     1184      212   15.2%   UUNET Technologies, Inc. 
AS2551       797      636      161   20.2%   ICG NetAhead, Inc 
AS4151       289      164      125   43.3%   USDA 
AS4293       383      274      109   28.5%   Cable & Wireless USA 
AS6595       168       60      108   64.3%   DoD Education Activity Network As
AS577        294      188      106   36.1%   Bell Advanced Communications Inc.
AS16473      177       74      103   58.2%   Bell South 
AS705        243      144       99   40.7%   UUNET Technologies, Inc. 
AS6429       199      103       96   48.2%   AT&T Chile Internet S.A. 
AS7018       746      656       90   12.1%   AT&T 
AS4755       215      128       87   40.5%   Videsh Sanchar Nigam Ltd. Autonom
AS7046       339      260       79   23.3%   UUNET Technologies, Inc. 
AS13999      103       25       78   75.7%   Mega Cable S.A. de C.V. 
AS4200       139       73       66   47.5%   Apex Global Information Services,
AS12302       95       30       65   68.4%   MobiFon S.A.
AS1239       462      398       64   13.9%   Sprint 
AS724        218      155       63   28.9%   DLA Systems Automation Center 
AS6471       123       61       62   50.4%   ENTEL CHILE S.A. 
AS3464       149       91       58   38.9%   Alabama SuperComputer Network 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS703        309      254       55   17.8%   UUNET Technologies, Inc. 
AS3908       332      277       55   16.6%   Supernet, Inc. 
AS226        147       94       53   36.1%   Los Nettos 
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS209        282      230       52   18.4%   Qwest 
AS1          548      496       52    9.5%   BBN Planet 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS855        145       95       50   34.5%   Canadian Research Network 
AS852        214      164       50   23.4%   Telus Advanced Communications 


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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