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The Cidr Report

  • From: CIDR Report
  • Date: Sat Aug 17 02:03:15 2002


This is an auto-generated mail on Fri Aug 16 23:00:01 PDT 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      A summary of the last weeks changes in terms of withdrawn and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 amount 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 16Aug02


0) General Status

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

Date	Prefixes
090802	112833
100802	112990
110802	112840
120802	112791
130802	112534
140802	112650
150802	112454
160802	112263

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:              13432

Number of ASes announcing only one prefix:      8161 (4608 cidr, 3553 classful)

Largest number of  cidr routes:                  715 announced by AS3908
Largest number of classful routes:              1192 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 16Aug02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS701       1192      962      230   19.3%   UUNET Technologies, Inc. 
AS1221      1043      824      219   21.0%   Telstra Pty Ltd
AS17557      265       94      171   64.5%   Pakistan Telecom
AS6595       227       58      169   74.4%   DoD Education Activity Network As
AS852        515      378      137   26.6%   Telus Advanced Communications 
AS7018       795      678      117   14.7%   AT&T 
AS16473      178       73      105   59.0%   Bell South 
AS4151       251      154       97   38.6%   USDA 
AS19632       99        5       94   94.9%   Metropolis Intercom S.A. 
AS12302      122       29       93   76.2%   MobiFon S.A.
AS16814      105       20       85   81.0%   NSS, S.A. 
AS226        170       89       81   47.6%   Los Nettos 
AS1239       500      419       81   16.2%   Sprint 
AS577        268      194       74   27.6%   Bell Advanced Communications Inc.
AS7046       289      216       73   25.3%   UUNET Technologies, Inc. 
AS4755       203      130       73   36.0%   Videsh Sanchar Nigam Ltd. Autonom
AS2048       179      106       73   40.8%   State of Louisiana 
AS724        214      152       62   29.0%   DLA Systems Automation Center 
AS19834       64        4       60   93.8%   NetForce, Inc. 
AS10620       85       25       60   70.6%   TVCABLE BOGOTA 
AS3464       161      103       58   36.0%   Alabama SuperComputer Network 
AS5515       243      186       57   23.5%   Sonera Finland Autonomous System
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS3908       283      228       55   19.4%   Supernet, Inc. 
AS9498        85       31       54   63.5%   BHARTI BT INTERNET LTD.
AS9051        82       28       54   65.9%   INCONET Autonomous System
AS209        286      232       54   18.9%   Qwest 
AS6535        69       16       53   76.8%   Chilesat Servicios  Empresariales
AS703        276      225       51   18.5%   UUNET Technologies, Inc. 
AS4538        87       36       51   58.6%   China Education and Research Netw

Total      54945    42384    12561   22.9%


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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