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The Cidr Report

  • From: CIDR Report
  • Date: Sat Jul 21 02:06:20 2001


This is an auto-generated mail on Fri Jul 20 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.

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      A summary of the last weeks changes in terms of withdrawn and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>.

Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.


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

                        CIDR REPORT for 20Jul01


0) General Status

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

Date	Prefixes
130701	100848
140701	100609
150701	101337
160701	100485
170701	100311
180701	100565
190701	100739
200701	100950

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:              11241

Number of ASes announcing only one prefix:      6694 (3840 cidr, 2854 classful)

Largest number of  cidr routes:                  865 announced by  AS701
Largest number of classful routes:              1414 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 20Jul01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1347     1001      346   25.7%   Telstra Pty Ltd
AS701       1414     1199      215   15.2%   UUNET Technologies, Inc.
AS4293       391      280      111   28.4%   Cable & Wireless USA
AS6595       169       59      110   65.1%   DoD Education Activity Networ
AS6429       199      102       97   48.7%   RdC Internet
AS13999      104        8       96   92.3%   Mega Cable S.A. de C.V.
AS705        232      137       95   40.9%   UUNET Technologies, Inc.
AS7018       726      634       92   12.7%   AT&T
AS4755       211      121       90   42.7%   VSNL India
AS4151       161       79       82   50.9%   USDA
AS8013       298      217       81   27.2%   PSINet Ltd. Canada
AS577        246      173       73   29.7%   Bell Canada
AS724        230      158       72   31.3%   DLA Systems Automation Center
AS7046       313      249       64   20.4%   UUNET Technologies, Inc.
AS6471       122       58       64   52.5%   ENTEL CHILE S.A.
AS16473      121       58       63   52.1%   Bell South 
AS4200       131       70       61   46.6%   Apex Global Information Servi
AS3464       148       91       57   38.5%   Alabama SuperComputer Network
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS1          569      513       56    9.8%   BBN Planet
AS1239       447      392       55   12.3%   Sprint ICM-Inria
AS6413        65       13       52   80.0%   Southern Online Systems, Inc.
AS3908       203      152       51   25.1%   Supernet, Inc.
AS17561      112       61       51   45.5%   Internet Service West Austral
AS852        213      163       50   23.5%   Telus Advanced Communications
AS4323       235      185       50   21.3%   Time Warner Communications, I
AS2149       320      270       50   15.6%   Performance Systems, Inc.
AS12302       83       33       50   60.2%   MobiFon S.A.
AS703        268      220       48   17.9%   UUNET Technologies, Inc.
AS5106        81       33       48   59.3%   Ameritech Advanced Data Servi


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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