The Cidr Report

Sat Dec 1 07:00:02 UTC 2001

This is an auto-generated mail on Fri Nov 30 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      A summary of the last weeks changes in terms of withdrawn and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 30Nov01

0) General Status

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

Date	Prefixes
231101	104388
241101	104158
251101	103973
261101	104689
271101	104073
281101	104130
291101	103988
301101	104104

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:              12046

Number of ASes announcing only one prefix:      7241 (4108 cidr, 3133 classful)

Largest number of  cidr routes:                  797 announced by  AS701
Largest number of classful routes:              1396 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 30Nov01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1197      921      276   23.1%   Telstra Pty Ltd
AS4151       319      179      140   43.9%   USDA 
AS16473      198       77      121   61.1%   Bell South 
AS4755       226      142       84   37.2%   Videsh Sanchar Nigam Ltd. Autonom
AS2048       184      105       79   42.9%   State of Louisiana 
AS1239       483      405       78   16.1%   Sprint 
AS19632       87       11       76   87.4%   Metropolis Intercom S.A. 
AS17557      154       83       71   46.1%   Pakistan Telecom
AS12302      104       36       68   65.4%   MobiFon S.A.
AS4200       127       62       65   51.2%   Apex Global Information Services,
AS2149       351      287       64   18.2%   Performance Systems, Inc. 
AS3464       156       95       61   39.1%   Alabama SuperComputer Network 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS4323       370      314       56   15.1%   Time Warner Communications, Inc. 
AS3908       303      251       52   17.2%   Supernet, Inc. 
AS17561      115       64       51   44.3%   Internet service provision to Wes
AS1          513      462       51    9.9%   BBN Planet 
AS209        292      242       50   17.1%   Qwest 
AS376        122       73       49   40.2%   Reseau Interordinateurs Scientiqu
AS16814       65       18       47   72.3%   NSS, S.A. 
AS11139       92       46       46   50.0%   Cable & Wireless Dominica 
AS15290      240      196       44   18.3%   AT&T Canada IES 
AS10620       64       21       43   67.2%   TVCABLE BOGOTA 
AS10292       72       29       43   59.7%   TELECOMMUNICATIONS OF JAMAICA 
AS5416        51        9       42   82.4%   BATELCO-BH
AS1267        68       26       42   61.8%   Infostrada S.p.A.
AS19834       51       11       40   78.4%   NetForce, Inc. 
AS2007       167      129       38   22.8%   INFONET 
AS12235       47        9       38   80.9%   Cove Software Systems Inc 
AS2652       103       67       36   35.0%   Government Telecommunications and

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