The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Aug 11 06:00:02 UTC 2001



This is an auto-generated mail on Fri Aug 10 23:00:00 PDT 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      A summary of the last weeks changes in terms of withdrawn and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 10Aug01


0) General Status

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

Date	Prefixes
030801	102236
040801	102194
050801	102268
060801	102340
070801	102456
080801	102930
090801	103092
100801	102845

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


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

*** Bogus 82.105.0.0/16 from AS3269
*** Bogus 82.105.128.0/17 from AS3269

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

Number of ASes in routing system:              11345

Number of ASes announcing only one prefix:      6735 (3850 cidr, 2885 classful)

Largest number of  cidr routes:                  862 announced by  AS701
Largest number of classful routes:              1396 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 10Aug01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1251      962      289   23.1%   Telstra Pty Ltd
AS701       1396     1186      210   15.0%   UUNET Technologies, Inc. 
AS2551       748      601      147   19.7%   ICG NetAhead, Inc 
AS4151       288      164      124   43.1%   USDA 
AS4293       391      279      112   28.6%   Cable & Wireless USA 
AS4755       257      147      110   42.8%   Videsh Sanchar Nigam Ltd. Autonom
AS6595       163       57      106   65.0%   DoD Education Activity Network As
AS577        294      188      106   36.1%   Bell Advanced Communications Inc.
AS6429       203      102      101   49.8%   AT&T Chile Internet S.A. 
AS13999      108       12       96   88.9%   Mega Cable S.A. de C.V. 
AS705        233      141       92   39.5%   UUNET Technologies, Inc. 
AS7018       735      646       89   12.1%   AT&T 
AS16473      151       65       86   57.0%   Bell South 
AS7046       325      253       72   22.2%   UUNET Technologies, Inc. 
AS724        222      156       66   29.7%   DLA Systems Automation Center 
AS6471       122       60       62   50.8%   ENTEL CHILE S.A. 
AS12302       93       32       61   65.6%   MobiFon S.A.
AS4200       126       66       60   47.6%   Apex Global Information Services,
AS1239       455      396       59   13.0%   Sprint 
AS3464       149       91       58   38.9%   Alabama SuperComputer Network 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS703        301      246       55   18.3%   UUNET Technologies, Inc. 
AS3908       325      270       55   16.9%   Supernet, Inc. 
AS1          547      492       55   10.1%   BBN Planet 
AS226        147       94       53   36.1%   Los Nettos 
AS6413        65       13       52   80.0%   Southern Online Systems, Inc. 
AS4323       242      190       52   21.5%   Time Warner Communications, Inc. 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS852        214      164       50   23.4%   Telus Advanced Communications 
AS9842        54        5       49   90.7%   Lotte Data Communication Company


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



More information about the NANOG mailing list