[apops] The Cidr Report

  • To: nanog at merit dot edu
  • Subject: [apops] The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 24 Nov 2000 12:00:03 -0800
  • Cc: tbates at cisco dot com, eof-list at ripe dot net, apops at apnic dot net, routing-wg at ripe dot net
  • Sender: owner-apops@lists.apnic.net
    • 
      This is an auto-generated mail on Fri Nov 24 12:00:00 PST 2000
      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            A summary of the last weeks changes in terms of withdrawn and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 24Nov00
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      051100	90552
      061100	90504
      071100	90705
      081100	91061
      091100	91153
      221100	92414
      231100	92419
      241100	92527
      
      Check http://www.employees.org/~tbates/cidr.plot.html for a plot
      of the table history.
      
      
      Possible Bogus Routes
      ---------------------
      
      *** Bogus 91.16.23.0/24 from AS11770
      *** Bogus 219.219.219.0 from AS2563
      
      AS Summary
      ----------
      
      Number of ASes in routing system:                 9183
      
      Number of ASes announcing only one prefix:        5305 (2973 cidr, 2332 classful)
      
      Largest number of  cidr routes:                    953 announced by  AS701
      Largest number of classful routes:                1360 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 24Nov00 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2563       430      135      295   68.6%   KoRean Education Network
      AS1221       624      455      169   27.1%   TELSTRA-AS
      AS9269       163       51      112   68.7%   Hong Kong CTI
      AS701       1360     1248      112    8.2%   Alternet
      AS2609       126       17      109   86.5%   EUnet-TN
      AS7545       162       54      108   66.7%   TPG Internet Pty Ltd
      AS8013       459      355      104   22.7%   PSINET-CA
      AS271        209      112       97   46.4%   BCnet Backbone
      AS6595       156       62       94   60.3%   DODDSEUR
      AS4755       206      112       94   45.6%   Videsh Sanchar Nigam Ltd. India
      AS13999       94        6       88   93.6%   UNKNOWN
      AS7657       277      193       84   30.3%   The Internet Group Limited
      AS705        334      253       81   24.3%   ALTERNET-AS
      AS4293       343      262       81   23.6%   Internal ASN for C&W
      AS174        527      446       81   15.4%   Performance Systems International
      AS7496       102       25       77   75.5%   Power Up
      AS4151       286      209       77   26.9%   USDA Internet Access Network
      AS7046       323      248       75   23.2%   UUNET-CUSTOMER
      AS724        238      165       73   30.7%   DLA-ASNBLOCK-AS
      AS577        243      173       70   28.8%   Bell Backbone
      AS3908       239      169       70   29.3%   Supernet, Inc.
      AS7018       589      524       65   11.0%   AT&T WorldNet Service Backbone
      AS5106       101       37       64   63.4%   AADS-COLUMBUS
      AS3749       121       59       62   51.2%   TECNET
      AS226        168      106       62   36.9%   USC/Information Sciences Institut
      AS816        382      322       60   15.7%   UUNET Canada (ASN-UUNETCA-AS4)
      AS376        141       81       60   42.6%   RISQ
      AS3602       307      249       58   18.9%   Sprint Canada Inc.
      AS16758       63        6       57   90.5%   UNKNOWN
      AS11252       90       37       53   58.9%   Idaho State 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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