The Cidr Report

Sat Jul 20 06:00:02 UTC 2002

This is an auto-generated mail on Fri Jul 19 23:00:00 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      A summary of the last weeks changes in terms of withdrawn and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 at cisco.com>.

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

                        CIDR REPORT for 19Jul02

0) General Status

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

Date	Prefixes
120702	111339
130702	111268
140702	111583
150702	111941
160702	112093
170702	111866
180702	111800
190702	111736

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.

Possible Bogus Routes
---------------------

*** Bogus 88.128.0.0/17 from AS9116
*** Bogus 88.128.128.0/17 from AS9116
*** Bogus 88.129.0.0/17 from AS9116
*** Bogus 88.129.128.0/17 from AS9116

AS Summary
----------

Number of ASes in routing system:              13270

Number of ASes announcing only one prefix:      8089 (4550 cidr, 3539 classful)

Largest number of  cidr routes:                  629 announced by AS3908
Largest number of classful routes:              1221 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 19Jul02 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1089      841      248   22.8%   Telstra Pty Ltd
AS701       1221      978      243   19.9%   UUNET Technologies, Inc. 
AS17557      293      101      192   65.5%   Pakistan Telecom
AS6595       221       54      167   75.6%   DoD Education Activity Network As
AS852        538      401      137   25.5%   Telus Advanced Communications 
AS7018       808      681      127   15.7%   AT&T 
AS16473      195       77      118   60.5%   Bell South 
AS7303       171       74       97   56.7%   Telecom Argentina Stet-France Tel
AS5515       437      341       96   22.0%   Sonera Finland Autonomous System
AS4151       236      141       95   40.3%   USDA 
AS19632       99        5       94   94.9%   Metropolis Intercom S.A. 
AS1239       517      423       94   18.2%   Sprint 
AS12302      119       26       93   78.2%   MobiFon S.A.
AS16814      105       20       85   81.0%   NSS, S.A. 
AS226        171       88       83   48.5%   Los Nettos 
AS7046       306      227       79   25.8%   UUNET Technologies, Inc. 
AS4755       209      133       76   36.4%   Videsh Sanchar Nigam Ltd. Autonom
AS2048       180      105       75   41.7%   State of Louisiana 
AS577        263      190       73   27.8%   Bell Advanced Communications Inc.
AS4323       401      333       68   17.0%   Time Warner Communications, Inc. 
AS724        214      152       62   29.0%   DLA Systems Automation Center 
AS3464       163      103       60   36.8%   Alabama SuperComputer Network 
AS19834       64        4       60   93.8%   NetForce, Inc. 
AS10620       84       24       60   71.4%   TVCABLE BOGOTA 
AS1          444      386       58   13.1%   GENUITY 
AS209        315      258       57   18.1%   Qwest 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS9051        82       26       56   68.3%   INCONET Autonomous System
AS3908       297      241       56   18.9%   Supernet, Inc. 
AS9498        84       29       55   65.5%   BHARTI BT INTERNET LTD.

Total      55004    42386    12618   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