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The Cidr Report

  • From: Tony Bates
  • Date: Fri Nov 27 15:44:47 1998

This is an auto-generated mail on Fri Nov 27 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      A summary of the last weeks changes in terms of withdrawn and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 27Nov98


0) General Status

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

Date	Prefixes
201198	54986
211198	55088
221198	55084
231198	55066
241198	55125
251198	55118
261198	54086
271198	54161

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:                 4262

Number of ASes announcing only one prefix:        2087 (1105 cidr, 982 classful)

Largest number of  cidr routes:                    339 announced by AS3561
Largest number of classful routes:                1002 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 27Nov98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        349      153      196   56.2%   BCnet Backbone
AS3749       229       73      156   68.1%   TECNET
AS2493       341      193      148   43.4%   iSTAR Internet, Inc.
AS701       1002      867      135   13.5%   Alternet
AS1785       535      400      135   25.2%   NYSERNet Backbone
AS174        686      555      131   19.1%   Performance Systems International
AS4200       188       96       92   48.9%   AGIS (Apex Global Information Ser
AS5668       126       39       87   69.0%   Century Telephone Inc.
AS1267       109       30       79   72.5%   IUNET-AS
AS4755       133       59       74   55.6%   Videsh Sanchar Nigam Ltd. India
AS4293       207      135       72   34.8%   IMCI
AS549        224      156       68   30.4%   ONet Backbone
AS4740       390      330       60   15.4%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517       127       71       56   44.1%   UNKNOWN
AS7046       256      200       56   21.9%   UUNET-CUSTOMER
AS1221       382      327       55   14.4%   AARNET-AS
AS6335        71       19       52   73.2%   NTRNET
AS7545       117       66       51   43.6%   TPG Internet Pty Ltd
AS72          88       40       48   54.5%   Schlumberger Information Network
AS1239       529      481       48    9.1%   SprintLink Backbone
AS7657       138       92       46   33.3%   The Internet Group Limited
AS803         77       33       44   57.1%   SaskNet Backbone
AS7496        72       30       42   58.3%   Power Up
AS3221        84       42       42   50.0%   RIPE-ASNBLOCK4
AS852        169      128       41   24.3%   AGT Advance Communication
AS10928       89       48       41   46.1%   UNKNOWN
AS719        440      402       38    8.6%   LANLINK-AS
AS7122       115       77       38   33.0%   MTS ADVANCED Network Policy
AS3804       157      124       33   21.0%   Bell Solutions
AS2707        65       32       33   50.8%   WEC


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