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The Cidr Report

  • From: CIDR Report
  • Date: Sat Feb 02 02:03:43 2002


This is an auto-generated mail on Fri Feb  1 23:00:00 PST 2002
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      A summary of the last weeks changes in terms of withdrawn and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@cisco.com>.


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

                        CIDR REPORT for 01Feb02


0) General Status

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

Date	Prefixes
250102	104855
260102	104659
270102	104702
280102	104727
290102	104793
300102	105544
310102	105664
010202	105568

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:              12323

Number of ASes announcing only one prefix:      7490 (4238 cidr, 3252 classful)

Largest number of  cidr routes:                  705 announced by  AS701
Largest number of classful routes:              1364 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 01Feb02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1171      901      270   23.1%   Telstra Pty Ltd
AS701       1364     1130      234   17.2%   UUNET Technologies, Inc. 
AS4151       287      156      131   45.6%   USDA 
AS577        318      194      124   39.0%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS7018       818      700      118   14.4%   AT&T 
AS6595       172       61      111   64.5%   DoD Education Activity Network As
AS17557      196       85      111   56.6%   Pakistan Telecom
AS705        286      183      103   36.0%   UUNET Technologies, Inc. 
AS7046       327      226      101   30.9%   UUNET Technologies, Inc. 
AS852        384      288       96   25.0%   Telus Advanced Communications 
AS19632       94        9       85   90.4%   Metropolis Intercom S.A. 
AS2048       185      105       80   43.2%   State of Louisiana 
AS12302      112       33       79   70.5%   MobiFon S.A.
AS1239       469      393       76   16.2%   Sprint 
AS4755       222      151       71   32.0%   Videsh Sanchar Nigam Ltd. Autonom
AS703        275      213       62   22.5%   UUNET Technologies, Inc. 
AS3464       159       97       62   39.0%   Alabama SuperComputer Network 
AS4200       118       57       61   51.7%   Apex Global Information Services,
AS7303       107       49       58   54.2%   Telecom Argentina Stet-France Tel
AS724        210      153       57   27.1%   DLA Systems Automation Center 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS3908       329      273       56   17.0%   Supernet, Inc. 
AS226        145       89       56   38.6%   Los Nettos 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS702        654      599       55    8.4%   UUNET Technologies, Inc. 
AS19834       63        8       55   87.3%   NetForce, Inc. 
AS4323       384      330       54   14.1%   Time Warner Communications, Inc. 
AS2149       310      257       53   17.1%   Performance Systems, Inc. 
AS1          487      436       51   10.5%   BBN Planet 

Total      53887    42128    11759   21.8%


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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