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The Cidr Report

  • From: Tony Bates
  • Date: Fri Sep 25 15:17:40 1998

This is an auto-generated mail on Fri Sep 25 12:00:00 PDT 1998
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      A summary of the last weeks changes in terms of withdrawn and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 xara.net for giving me access to their routing tables once a
day. 

Please send any comments about this report directly to me.

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


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

                        CIDR REPORT for 25Sep98


0) General Status

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

Date	Prefixes
180998	52123
190998	51991
200998	51978
210998	52066
220998	51837
230998	51717
240998	51971
250998	51953

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:                 4041

Number of ASes announcing only one prefix:        1941 (1013 cidr, 928 classful)

Largest number of  cidr routes:                    341 announced by AS3561
Largest number of classful routes:                 948 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 25Sep98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        349      151      198   56.7%   BCnet Backbone
AS4293       418      245      173   41.4%   IMCI
AS3749       232       72      160   69.0%   TECNET
AS2493       362      206      156   43.1%   iSTAR Internet, Inc.
AS701        948      817      131   13.8%   Alternet
AS174        699      569      130   18.6%   Performance Systems International
AS4200       188       96       92   48.9%   AGIS (Apex Global Information Ser
AS5668       127       40       87   68.5%   Century Telephone Inc.
AS4755       124       47       77   62.1%   Videsh Sanchar Nigam Ltd. India
AS7046       246      170       76   30.9%   UUNET-CUSTOMER
AS2685       224      148       76   33.9%   IBM Global Network - US
AS3804       230      157       73   31.7%   Bell Solutions
AS3221       118       45       73   61.9%   EENet Autonomous System
AS4740       395      334       61   15.4%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517       124       72       52   41.9%   ULAKNET-ASN
AS549        197      147       50   25.4%   ONet Backbone
AS6335        69       20       49   71.0%   NTRNET
AS72          87       39       48   55.2%   Schlumberger Information Network
AS1239       541      494       47    8.7%   SprintLink Backbone
AS803         77       33       44   57.1%   SaskNet Backbone
AS7122       122       80       42   34.4%   MTS ADVANCED Network Policy
AS7545       104       63       41   39.4%   TPG Internet Pty Ltd
AS4539        68       28       40   58.8%   NETROPOLIS
AS852        160      121       39   24.4%   AGT Advance Communication
AS1221       310      271       39   12.6%   AARNET-AS
AS6181        67       29       38   56.7%   FUSE-NET
AS10459       46        9       37   80.4%   WANSASN
AS10928       87       51       36   41.4%   UNKNOWN
AS2707        64       31       33   51.6%   WEC
AS1273        62       29       33   53.2%   ECRC 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




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