The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Dec 8 07:00:02 UTC 2001


This is an auto-generated mail on Fri Dec  7 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      A summary of the last weeks changes in terms of withdrawn and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 07Dec01


0) General Status

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

Date	Prefixes
301101	104104
011201	104113
021201	104416
031201	104321
041201	104345
051201	104395
061201	104443
071201	104426

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:              12122

Number of ASes announcing only one prefix:      7324 (4156 cidr, 3168 classful)

Largest number of  cidr routes:                  801 announced by  AS701
Largest number of classful routes:              1352 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07Dec01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1197      920      277   23.1%   Telstra Pty Ltd
AS4151       294      161      133   45.2%   USDA 
AS577        314      193      121   38.5%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS4755       226      141       85   37.6%   Videsh Sanchar Nigam Ltd. Autonom
AS2048       184      105       79   42.9%   State of Louisiana 
AS1239       489      410       79   16.2%   Sprint 
AS17557      155       78       77   49.7%   Pakistan Telecom
AS19632       87       11       76   87.4%   Metropolis Intercom S.A. 
AS12302      107       31       76   71.0%   MobiFon S.A.
AS3464       161       96       65   40.4%   Alabama SuperComputer Network 
AS2149       347      283       64   18.4%   Performance Systems, Inc. 
AS4323       373      315       58   15.5%   Time Warner Communications, Inc. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS4200       111       55       56   50.5%   Apex Global Information Services,
AS13999       68       14       54   79.4%   Mega Cable S.A. de C.V. 
AS1          520      466       54   10.4%   BBN Planet 
AS3908       310      257       53   17.1%   Supernet, Inc. 
AS17561      115       64       51   44.3%   Internet service provision to Wes
AS376        123       73       50   40.7%   Reseau Interordinateurs Scientiqu
AS209        298      248       50   16.8%   Qwest 
AS16814       65       18       47   72.3%   NSS, S.A. 
AS15290      237      194       43   18.1%   AT&T Canada IES 
AS11139       90       47       43   47.8%   Cable & Wireless Dominica 
AS10620       64       21       43   67.2%   TVCABLE BOGOTA 
AS10292       72       29       43   59.7%   TELECOMMUNICATIONS OF JAMAICA 
AS5536        60       18       42   70.0%   Internet Egypt Network
AS5416        51        9       42   82.4%   BATELCO-BH
AS19834       56       14       42   75.0%   NetForce, Inc. 
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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