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The Cidr Report




This is an auto-generated mail on Fri Aug 17 23:00:00 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      A summary of the last weeks changes in terms of withdrawn and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 17Aug01


0) General Status

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

Date	Prefixes
100801	102845
110801	102706
120801	102533
130801	102657
140801	102662
150801	102621
160801	102577
170801	102866

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:              11408

Number of ASes announcing only one prefix:      6792 (3875 cidr, 2917 classful)

Largest number of  cidr routes:                  852 announced by  AS701
Largest number of classful routes:              1406 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 17Aug01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1258      970      288   22.9%   Telstra Pty Ltd
AS701       1406     1188      218   15.5%   UUNET Technologies, Inc. 
AS2551       798      637      161   20.2%   ICG NetAhead, Inc 
AS4151       289      165      124   42.9%   USDA 
AS4293       379      270      109   28.8%   Cable & Wireless USA 
AS6595       164       58      106   64.6%   DoD Education Activity Network As
AS577        294      188      106   36.1%   Bell Advanced Communications Inc.
AS16473      173       70      103   59.5%   Bell South 
AS13999      113       11      102   90.3%   Mega Cable S.A. de C.V. 
AS705        245      145      100   40.8%   UUNET Technologies, Inc. 
AS6429       200      103       97   48.5%   AT&T Chile Internet S.A. 
AS7018       741      652       89   12.0%   AT&T 
AS4755       210      123       87   41.4%   Videsh Sanchar Nigam Ltd. Autonom
AS7046       324      254       70   21.6%   UUNET Technologies, Inc. 
AS724        231      164       67   29.0%   DLA Systems Automation Center 
AS6471       123       60       63   51.2%   ENTEL CHILE S.A. 
AS12302       94       33       61   64.9%   MobiFon S.A.
AS1239       457      398       59   12.9%   Sprint 
AS4200       126       68       58   46.0%   Apex Global Information Services,
AS3464       148       91       57   38.5%   Alabama SuperComputer Network 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS703        309      254       55   17.8%   UUNET Technologies, Inc. 
AS3908       320      266       54   16.9%   Supernet, Inc. 
AS226        147       94       53   36.1%   Los Nettos 
AS1          543      490       53    9.8%   BBN Planet 
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS209        284      232       52   18.3%   Qwest 
AS4323       240      189       51   21.2%   Time Warner Communications, Inc. 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS855        145       95       50   34.5%   Canadian Research Network 


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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