The Cidr Report

Sat Nov 24 07:00:04 UTC 2001

This is an auto-generated mail on Fri Nov 23 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      A summary of the last weeks changes in terms of withdrawn and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 23Nov01

0) General Status

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

Date	Prefixes
161101	105107
171101	104669
181101	104452
191101	104732
201101	104515
211101	104367
221101	104601
231101	104388

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:               7341

Number of ASes announcing only one prefix:      3130 (0 cidr, 3130 classful)

Largest number of  cidr routes:                    0 announced by       
Largest number of classful routes:              1416 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 23Nov01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1202      928      274   22.8%   Telstra Pty Ltd
AS701       1416     1175      241   17.0%   UUNET Technologies, Inc. 
AS4151       316      179      137   43.4%   USDA 
AS4755       328      197      131   39.9%   Videsh Sanchar Nigam Ltd. Autonom
AS16473      203       77      126   62.1%   Bell South 
AS577        319      196      123   38.6%   Bell Advanced Communications Inc.
AS7018       814      695      119   14.6%   AT&T 
AS6595       162       57      105   64.8%   DoD Education Activity Network As
AS705        277      175      102   36.8%   UUNET Technologies, Inc. 
AS852        390      296       94   24.1%   Telus Advanced Communications 
AS2048       206      116       90   43.7%   State of Louisiana 
AS8010       124       36       88   71.0%   PublicNet Communications, Inc. 
AS4323       396      311       85   21.5%   Time Warner Communications, Inc. 
AS1239       475      399       76   16.0%   Sprint 
AS19632       85       10       75   88.2%   Metropolis Intercom S.A. 
AS1273       327      257       70   21.4%   Cable & Wireless ECRC GmbH
AS12302      106       38       68   64.2%   MobiFon S.A.
AS2149       369      302       67   18.2%   Performance Systems, Inc. 
AS6471       133       67       66   49.6%   ENTEL CHILE S.A. 
AS17557      142       76       66   46.5%   Pakistan Telecom
AS4200       126       61       65   51.6%   Apex Global Information Services,
AS3464       161       96       65   40.4%   Alabama SuperComputer Network 
AS724        209      150       59   28.2%   DLA Systems Automation Center 
AS7046       294      235       59   20.1%   UUNET Technologies, Inc. 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS703        273      219       54   19.8%   UUNET Technologies, Inc. 
AS3908       300      248       52   17.3%   Supernet, Inc. 
AS17561      113       62       51   45.1%   Internet service provision to Wes
AS855        143       93       50   35.0%   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