The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Dec 15 07:00:02 UTC 2001


This is an auto-generated mail on Fri Dec 14 23:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 14Dec01


0) General Status

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

Date	Prefixes
071201	104426
081201	104464
091201	104331
101201	104395
111201	104269
121201	104989
131201	105206
141201	104473

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:              12150

Number of ASes announcing only one prefix:      7358 (4177 cidr, 3181 classful)

Largest number of  cidr routes:                  785 announced by  AS701
Largest number of classful routes:              1373 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 14Dec01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1164      895      269   23.1%   Telstra Pty Ltd
AS701       1373     1143      230   16.8%   UUNET Technologies, Inc. 
AS4151       294      160      134   45.6%   USDA 
AS16473      203       77      126   62.1%   Bell South 
AS577        317      193      124   39.1%   Bell Advanced Communications Inc.
AS7018       801      693      108   13.5%   AT&T 
AS705        280      178      102   36.4%   UUNET Technologies, Inc. 
AS6595       156       57       99   63.5%   DoD Education Activity Network As
AS852        395      300       95   24.1%   Telus Advanced Communications 
AS8010       123       38       85   69.1%   PublicNet Communications, Inc. 
AS4755       226      141       85   37.6%   Videsh Sanchar Nigam Ltd. Autonom
AS17557      164       79       85   51.8%   Pakistan Telecom
AS7046       305      224       81   26.6%   UUNET Technologies, Inc. 
AS19632       92       11       81   88.0%   Metropolis Intercom S.A. 
AS1239       485      405       80   16.5%   Sprint 
AS2048       183      104       79   43.2%   State of Louisiana 
AS12302      109       33       76   69.7%   MobiFon S.A.
AS6471       134       68       66   49.3%   ENTEL CHILE S.A. 
AS3464       160       98       62   38.8%   Alabama SuperComputer Network 
AS724        211      150       61   28.9%   DLA Systems Automation Center 
AS703        279      218       61   21.9%   UUNET Technologies, Inc. 
AS2149       337      278       59   17.5%   Performance Systems, Inc. 
AS4200       112       55       57   50.9%   Apex Global Information Services,
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS1          520      465       55   10.6%   BBN Planet 
AS3908       311      258       53   17.0%   Supernet, Inc. 
AS209        298      247       51   17.1%   Qwest 
AS855        145       95       50   34.5%   Canadian Research Network 
AS376        124       74       50   40.3%   Reseau Interordinateurs Scientiqu


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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