The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Dec 22 07:00:02 UTC 2001


This is an auto-generated mail on Fri Dec 21 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      A summary of the last weeks changes in terms of withdrawn and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 21Dec01


0) General Status

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

Date	Prefixes
141201	104473
151201	104490
161201	104499
171201	104515
181201	104565
191201	104617
201201	104497
211201	104932

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:              12187

Number of ASes announcing only one prefix:      7366 (4178 cidr, 3188 classful)

Largest number of  cidr routes:                  773 announced by  AS701
Largest number of classful routes:              1372 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 21Dec01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1179      909      270   22.9%   Telstra Pty Ltd
AS701       1372     1142      230   16.8%   UUNET Technologies, Inc. 
AS4151       292      160      132   45.2%   USDA 
AS577        317      193      124   39.1%   Bell Advanced Communications Inc.
AS16473      199       77      122   61.3%   Bell South 
AS7018       795      682      113   14.2%   AT&T 
AS6595       162       58      104   64.2%   DoD Education Activity Network As
AS705        286      183      103   36.0%   UUNET Technologies, Inc. 
AS852        399      302       97   24.3%   Telus Advanced Communications 
AS17557      169       80       89   52.7%   Pakistan Telecom
AS8010       123       38       85   69.1%   PublicNet Communications, Inc. 
AS7046       306      225       81   26.5%   UUNET Technologies, Inc. 
AS4755       213      132       81   38.0%   Videsh Sanchar Nigam Ltd. Autonom
AS19632       92       11       81   88.0%   Metropolis Intercom S.A. 
AS1239       490      411       79   16.1%   Sprint 
AS2048       183      107       76   41.5%   State of Louisiana 
AS12302      109       33       76   69.7%   MobiFon S.A.
AS724        220      158       62   28.2%   DLA Systems Automation Center 
AS703        284      222       62   21.8%   UUNET Technologies, Inc. 
AS3464       160       98       62   38.8%   Alabama SuperComputer Network 
AS4200       112       55       57   50.9%   Apex Global Information Services,
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS4323       368      312       56   15.2%   Time Warner Communications, Inc. 
AS3908       321      265       56   17.4%   Supernet, Inc. 
AS2149       326      270       56   17.2%   Performance Systems, Inc. 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS1          514      458       56   10.9%   BBN Planet 
AS6471       120       66       54   45.0%   ENTEL CHILE S.A. 
AS209        297      246       51   17.2%   Qwest 
AS855        144       94       50   34.7%   Canadian Research Network 


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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