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The Cidr Report

  • From: Tony Bates
  • Date: Fri Sep 11 15:17:48 1998

This is an auto-generated mail on Fri Sep 11 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      A summary of the last weeks changes in terms of withdrawn and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 11Sep98


0) General Status

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

Date	Prefixes
040998	52828
050998	52652
060998	52614
070998	52667
080998	52746
090998	52823
100998	53697
110998	53238

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:                 4054

Number of ASes announcing only one prefix:        1961 (1002 cidr, 959 classful)

Largest number of  cidr routes:                    343 announced by AS3561
Largest number of classful routes:                1185 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 11Sep98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS701       1185      956      229   19.3%   Alternet
AS271        349      152      197   56.4%   BCnet Backbone
AS4293       445      258      187   42.0%   IMCI
AS174        789      611      178   22.6%   Performance Systems International
AS3749       225       68      157   69.8%   TECNET
AS2493       373      217      156   41.8%   iSTAR Internet, Inc.
AS4200       192      100       92   47.9%   AGIS (Apex Global Information Ser
AS5668       128       41       87   68.0%   Century Telephone Inc.
AS2685       229      151       78   34.1%   IBM Global Network - US
AS4755       125       49       76   60.8%   Videsh Sanchar Nigam Ltd. India
AS3221       117       44       73   62.4%   EENet Autonomous System
AS4740       404      336       68   16.8%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS3493       251      183       68   27.1%   INTERLINK
AS7046       239      172       67   28.0%   UUNET-CUSTOMER
AS3804       215      157       58   27.0%   Bell Solutions
AS10928      101       46       55   54.5%   UNKNOWN
AS549        204      151       53   26.0%   ONet Backbone
AS8517       123       71       52   42.3%   ULAKNET-ASN
AS6335        69       20       49   71.0%   NTRNET
AS72          87       39       48   55.2%   Schlumberger Information Network
AS1239       548      501       47    8.6%   SprintLink Backbone
AS803         78       34       44   56.4%   SaskNet Backbone
AS6181        66       26       40   60.6%   FUSE-NET
AS4539        67       27       40   59.7%   NETROPOLIS
AS852        159      120       39   24.5%   AGT Advance Communication
AS3403       159      120       39   24.5%   TIAC
AS7122       118       80       38   32.2%   MTS ADVANCED Network Policy
AS10459       45       10       35   77.8%   WANSASN
AS2707        64       31       33   51.6%   WEC
AS6332        89       58       31   34.8%   TELNOR


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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