The Cidr Report

Tony Bates tbates at cisco.com
Fri Nov 13 20:00:02 UTC 1998


This is an auto-generated mail on Fri Nov 13 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 13Nov98


0) General Status

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

Date	Prefixes
061198	53673
071198	53323
081198	53161
091198	53249
101198	53388
111198	53419
121198	53674
131198	53601

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:                 4244

Number of ASes announcing only one prefix:        2088 (1113 cidr, 975 classful)

Largest number of  cidr routes:                    338 announced by AS3561
Largest number of classful routes:                 975 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 13Nov98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        349      150      199   57.0%   BCnet Backbone
AS1785       583      402      181   31.0%   NYSERNet Backbone
AS3749       230       70      160   69.6%   TECNET
AS2493       345      195      150   43.5%   iSTAR Internet, Inc.
AS701        975      842      133   13.6%   Alternet
AS174        690      562      128   18.6%   Performance Systems International
AS4200       187       95       92   49.2%   AGIS (Apex Global Information Ser
AS5668       127       40       87   68.5%   Century Telephone Inc.
AS4293       207      135       72   34.8%   IMCI
AS4755       128       64       64   50.0%   Videsh Sanchar Nigam Ltd. India
AS549        221      159       62   28.1%   ONet Backbone
AS4740       388      326       62   16.0%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7046       265      205       60   22.6%   UUNET-CUSTOMER
AS8517       127       72       55   43.3%   ULAKNET-ASN
AS7545       117       65       52   44.4%   TPG Internet Pty Ltd
AS6335        71       19       52   73.2%   NTRNET
AS72          88       40       48   54.5%   Schlumberger Information Network
AS1239       523      477       46    8.8%   SprintLink Backbone
AS803         77       33       44   57.1%   SaskNet Backbone
AS1221       354      310       44   12.4%   AARNET-AS
AS7122       127       85       42   33.1%   MTS ADVANCED Network Policy
AS3221        84       42       42   50.0%   EENet Autonomous System
AS852        166      125       41   24.7%   AGT Advance Communication
AS10928       91       50       41   45.1%   UNKNOWN
AS3804       182      143       39   21.4%   Bell Solutions
AS7496        66       33       33   50.0%   Power Up
AS2707        65       32       33   50.8%   WEC
AS6181        63       31       32   50.8%   FUSE-NET
AS719        432      401       31    7.2%   LANLINK autonomous system
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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