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The Cidr Report

  • From: Tony Bates
  • Date: Fri Sep 18 15:14:27 1998

This is an auto-generated mail on Fri Sep 18 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      A summary of the last weeks changes in terms of withdrawn and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 18Sep98


0) General Status

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

Date	Prefixes
110998	53238
120998	51812
130998	51865
140998	51883
150998	52067
160998	52072
170998	51947
180998	52123

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:                 4020

Number of ASes announcing only one prefix:        1940 (1002 cidr, 938 classful)

Largest number of  cidr routes:                    340 announced by AS3561
Largest number of classful routes:                1167 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 18Sep98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS701       1167      936      231   19.8%   Alternet
AS271        345      149      196   56.8%   BCnet Backbone
AS4293       442      255      187   42.3%   IMCI
AS3749       226       68      158   69.9%   TECNET
AS2493       367      212      155   42.2%   iSTAR Internet, Inc.
AS174        701      570      131   18.7%   Performance Systems International
AS4200       187       96       91   48.7%   AGIS (Apex Global Information Ser
AS5668       128       41       87   68.0%   Century Telephone Inc.
AS4755       124       46       78   62.9%   Videsh Sanchar Nigam Ltd. India
AS2685       227      150       77   33.9%   IBM Global Network - US
AS3804       231      158       73   31.6%   Bell Solutions
AS3221       117       44       73   62.4%   EENet Autonomous System
AS7046       246      175       71   28.9%   UUNET-CUSTOMER
AS4740       385      331       54   14.0%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS549        203      150       53   26.1%   ONet Backbone
AS8517       124       72       52   41.9%   ULAKNET-ASN
AS10928      100       48       52   52.0%   UNKNOWN
AS6335        69       20       49   71.0%   NTRNET
AS72          87       39       48   55.2%   Schlumberger Information Network
AS1239       542      495       47    8.7%   SprintLink Backbone
AS803         78       34       44   56.4%   SaskNet Backbone
AS4539        68       28       40   58.8%   NETROPOLIS
AS852        160      121       39   24.4%   AGT Advance Communication
AS7122       119       80       39   32.8%   MTS ADVANCED Network Policy
AS6181        65       28       37   56.9%   FUSE-NET
AS10459       45       10       35   77.8%   WANSASN
AS2707        64       31       33   51.6%   WEC
AS1221       281      249       32   11.4%   AARNET-AS
AS6332        89       58       31   34.8%   TELNOR
AS4307        32        1       31   96.9%   SVINET-1


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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