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The Cidr Report

  • From: cidr-report
  • Date: Sat Jul 14 02:05:53 2001


This is an auto-generated mail on Fri Jul 13 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      A summary of the last weeks changes in terms of withdrawn and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@cisco.com.

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


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

                        CIDR REPORT for 13Jul01


0) General Status

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

Date	Prefixes
060701	101036
070701	100965
080701	100869
090701	100962
100701	100995
110701	101196
120701	101105
130701	100848

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:                11205

Number of ASes announcing only one prefix:        6646 (3807 cidr, 2839 classful)

Largest number of  cidr routes:                    863 announced by  AS701
Largest number of classful routes:                1429 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 13Jul01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1335      997      338   25.3%   Telstra Pty Ltd
AS701       1429     1212      217   15.2%   UUNET Technologies, Inc.
AS4293       395      281      114   28.9%   Cable & Wireless USA
AS6595       161       57      104   64.6%   DoD Education Activity Networ
AS13999      104        8       96   92.3%   Mega Cable S.A. de C.V.
AS705        232      137       95   40.9%   UUNET Technologies, Inc.
AS6429       200      108       92   46.0%   RdC Internet
AS7018       730      639       91   12.5%   AT&T
AS4755       211      120       91   43.1%   VSNL India
AS2568       146       55       91   62.3%   CTS Network Services
AS4151       160       78       82   51.2%   USDA
AS8013       296      216       80   27.0%   PSINet Ltd. Canada
AS577        246      173       73   29.7%   Bell Canada
AS724        237      165       72   30.4%   DLA Systems Automation Center
AS7046       311      247       64   20.6%   UUNET Technologies, Inc.
AS6471       122       59       63   51.6%   ENTEL CHILE S.A.
AS3464       151       90       61   40.4%   Alabama SuperComputer Network
AS16473      113       54       59   52.2%   Bell South 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS1          570      514       56    9.8%   BBN Planet
AS1239       440      385       55   12.5%   Sprint ICM-Inria
AS226        144       91       53   36.8%   Los Nettos
AS6413        65       13       52   80.0%   Southern Online Systems, Inc.
AS3908       202      151       51   25.2%   Supernet, Inc.
AS17561      112       61       51   45.5%   Internet Service West Austral
AS852        215      165       50   23.3%   Telus Advanced Communications
AS9842        54        5       49   90.7%   Lotte Data Communication Comp
AS2149       317      268       49   15.5%   Performance Systems, Inc.
AS5106        81       33       48   59.3%   Ameritech Advanced Data Servi
AS4323       231      183       48   20.8%   Time Warner Communications, I


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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