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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 22 15:05:39 1999


This is an auto-generated mail on Fri Oct 22 12:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 22Oct99


0) General Status

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

Date	Prefixes
151099	65450
161099	65076
171099	65195
181099	65279
191099	65291
201099	65598
211099	65550
221099	65598

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.


Possible Bogus Routes
---------------------

*** Bogus 110.30.236.0/24 from AS577

AS Summary
----------

Number of ASes in routing system:                 5854

Number of ASes announcing only one prefix:        3086 (1688 cidr, 1398 classful)

Largest number of  cidr routes:                    583 announced by  AS701
Largest number of classful routes:                 945 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 22Oct99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      144      239   62.4%   BCnet Backbone
AS719        733      567      166   22.6%   LANLINK autonomous system
AS7046       397      260      137   34.5%   UUNET-CUSTOMER
AS9269       139       15      124   89.2%   Hong Kong CTI
AS2609       128        8      120   93.8%   EUnet-TN
AS1221       623      513      110   17.7%   TELSTRA-AS
AS6944       124       20      104   83.9%   RapidSite, Inc.
AS174        573      483       90   15.7%   Performance Systems International
AS7657       249      161       88   35.3%   The Internet Group Limited
AS4293       228      142       86   37.7%   Internal ASN for C&W
AS577        265      180       85   32.1%   Bell Canada Backbone
AS7496       113       36       77   68.1%   Power Up
AS7545       140       64       76   54.3%   TPG Internet Pty Ltd
AS3749       140       64       76   54.3%   TECNET
AS4200       184      110       74   40.2%   AGIS (Apex Global Information Ser
AS4740       340      288       52   15.3%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS209        314      265       49   15.6%   Qwest Communications
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS701        945      900       45    4.8%   Alternet
AS816        224      181       43   19.2%   UUNET Canada (ASN-UUNETCA-AS4)
AS549        221      178       43   19.5%   ONet Backbone
AS2493       134       93       41   30.6%   iSTAR Internet, Inc.
AS9304        54       15       39   72.2%   Hutchcity
AS6528        45        7       38   84.4%   WORLD-LYNX
AS4755        97       63       34   35.1%   Videsh Sanchar Nigam Ltd. India
AS1          497      463       34    6.8%   GTE Internetworking
AS6172       146      113       33   22.6%   HOME-NET-1
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)
AS1785       236      204       32   13.6%   NYSERNet Backbone
AS9453        33        2       31   93.9%   Soongsil University


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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