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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jul 09 15:02:57 1999


This is an auto-generated mail on Fri Jul  9 12:00:00 PDT 1999
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      A summary of the last weeks changes in terms of withdrawn and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 09Jul99


0) General Status

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

Date	Prefixes
020799	60891
030799	60878
040799	60943
050799	60887
060799	60932
070799	61691
080799	61806
090799	61684

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:                 5250

Number of ASes announcing only one prefix:        2730 (1503 cidr, 1227 classful)

Largest number of  cidr routes:                    432 announced by  AS701
Largest number of classful routes:                 831 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 09Jul99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS816        826      589      237   28.7%   UUNET Canada (ASN-UUNETCA-AS4)
AS271        348      145      203   58.3%   BCnet Backbone
AS4293       268      159      109   40.7%   IMCI
AS2609       122       27       95   77.9%   EUnet-TN
AS577        282      188       94   33.3%   Bell Canada Backbone
AS174        585      496       89   15.2%   Performance Systems International
AS7046       325      242       83   25.5%   UUNET-CUSTOMER
AS4200       186      105       81   43.5%   AGIS (Apex Global Information Ser
AS7545       141       66       75   53.2%   TPG Internet Pty Ltd
AS3749       134       61       73   54.5%   TECNET
AS1221       485      413       72   14.8%   TELSTRA-AS
AS10928      119       50       69   58.0%   UNKNOWN
AS7496       100       34       66   66.0%   Power Up
AS7657       206      144       62   30.1%   The Internet Group Limited
AS9269        71       12       59   83.1%   Hong Kong CTI
AS72          95       39       56   58.9%   Schlumberger Information Network
AS4740       313      260       53   16.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS719        456      405       51   11.2%   LANLINK autonomous system
AS6944        58        7       51   87.9%   RapidSite, Inc.
AS2493       165      114       51   30.9%   iSTAR Internet, Inc.
AS4755       123       74       49   39.8%   Videsh Sanchar Nigam Ltd. India
AS803         78       34       44   56.4%   SaskNet Backbone
AS549        219      175       44   20.1%   ONet Backbone
AS3737       110       69       41   37.3%   PenTeleData Inc. (ASN-PTD)
AS1          490      454       36    7.3%   BBNPLANET
AS6172       153      120       33   21.6%   HOME-NET-1
AS1785       246      213       33   13.4%   NYSERNet Backbone
AS6762        33        2       31   93.9%   Telecom Italia international high
AS4307        32        1       31   96.9%   SVINET-1
AS3549       135      104       31   23.0%   Frontier GlobalCenter


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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