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The Cidr Report

  • From: CIDR Report
  • Date: Sat Nov 17 02:03:40 2001


This is an auto-generated mail on Fri Nov 16 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      A summary of the last weeks changes in terms of withdrawn and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@cisco.com>.


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

                        CIDR REPORT for 16Nov01


0) General Status

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

Date	Prefixes
091101	105100
101101	105013
111101	104996
121101	104919
131101	105175
141101	105033
151101	105133
161101	105107

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:               8932

Number of ASes announcing only one prefix:      4062 (4062 cidr, 0 classful)

Largest number of  cidr routes:                  798 announced by  AS701
Largest number of classful routes:                 0 announced by       



1) Gains by aggregating at the origin AS level

 --- 16Nov01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1209      929      280   23.2%   Telstra Pty Ltd
AS4151       318      181      137   43.1%   USDA 
AS16473      202       77      125   61.9%   Bell South 
AS577        308      190      118   38.3%   Bell Advanced Communications Inc.
AS4293       360      256      104   28.9%   Cable & Wireless USA 
AS4755       272      169      103   37.9%   Videsh Sanchar Nigam Ltd. Autonom
AS2048       213      116       97   45.5%   State of Louisiana 
AS1239       482      406       76   15.8%   Sprint 
AS2149       387      318       69   17.8%   Performance Systems, Inc. 
AS17557      142       74       68   47.9%   Pakistan Telecom
AS19632       75        8       67   89.3%   Metropolis Intercom S.A. 
AS12302      105       38       67   63.8%   MobiFon S.A.
AS6471       133       67       66   49.6%   ENTEL CHILE S.A. 
AS4200       126       61       65   51.6%   Apex Global Information Services,
AS3464       160       96       64   40.0%   Alabama SuperComputer Network 
AS4323       338      276       62   18.3%   Time Warner Communications, Inc. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS3908       299      247       52   17.4%   Supernet, Inc. 
AS209        295      244       51   17.3%   Qwest 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS376        124       74       50   40.3%   Reseau Interordinateurs Scientiqu
AS16814       65       18       47   72.3%   NSS, S.A. 
AS10292       73       27       46   63.0%   TELECOMMUNICATIONS OF JAMAICA 
AS1          512      466       46    9.0%   BBN Planet 
AS11139       92       47       45   48.9%   Cable & Wireless Dominica 
AS10620       67       22       45   67.2%   TVCABLE BOGOTA 
AS15290      244      201       43   17.6%   AT&T Canada IES 
AS5416        51        9       42   82.4%   BATELCO-BH
AS1267        68       26       42   61.8%   Infostrada S.p.A.


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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