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The Cidr Report




This is an auto-generated mail on Fri Aug 31 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      A summary of the last weeks changes in terms of withdrawn and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 31Aug01


0) General Status

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

Date	Prefixes
240801	103170
250801	103304
260801	103160
270801	102884
280801	103189
290801	103298
300801	103283
310801	103087

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:              11502

Number of ASes announcing only one prefix:      6853 (3906 cidr, 2947 classful)

Largest number of  cidr routes:                  849 announced by  AS701
Largest number of classful routes:              1398 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 31Aug01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1270      964      306   24.1%   Telstra Pty Ltd
AS701       1398     1187      211   15.1%   UUNET Technologies, Inc. 
AS4151       295      166      129   43.7%   USDA 
AS577        314      193      121   38.5%   Bell Advanced Communications Inc.
AS6595       169       60      109   64.5%   DoD Education Activity Network As
AS4293       381      272      109   28.6%   Cable & Wireless USA 
AS16473      177       74      103   58.2%   Bell South 
AS13999      113       11      102   90.3%   Mega Cable S.A. de C.V. 
AS705        244      145       99   40.6%   UUNET Technologies, Inc. 
AS6429       198      104       94   47.5%   AT&T Chile Internet S.A. 
AS7018       756      663       93   12.3%   AT&T 
AS4755       212      125       87   41.0%   Videsh Sanchar Nigam Ltd. Autonom
AS12302       96       26       70   72.9%   MobiFon S.A.
AS4200       150       82       68   45.3%   Apex Global Information Services,
AS7046       323      257       66   20.4%   UUNET Technologies, Inc. 
AS6471       128       62       66   51.6%   ENTEL CHILE S.A. 
AS1239       464      399       65   14.0%   Sprint 
AS724        209      149       60   28.7%   DLA Systems Automation Center 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS703        310      255       55   17.7%   UUNET Technologies, Inc. 
AS3908       321      266       55   17.1%   Supernet, Inc. 
AS3464       144       91       53   36.8%   Alabama SuperComputer Network 
AS209        289      236       53   18.3%   Qwest 
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS226        145       93       52   35.9%   Los Nettos 
AS19632       60        9       51   85.0%   Metropolis Intercom S.A. 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS1          545      494       51    9.4%   BBN Planet 
AS17557      110       62       48   43.6%   Pakistan Telecom
AS4323       241      194       47   19.5%   Time Warner Communications, Inc. 


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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