[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, 29 Dec 2000 12:00:04 -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 Dec 29 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            A summary of the last weeks changes in terms of withdrawn and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 29Dec00
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      221200	96064
      231200	96185
      241200	96234
      251200	96104
      261200	95929
      271200	96096
      281200	96103
      291200	96164
      
      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:                 8416
      
      Number of ASes announcing only one prefix:        4902 (2470 cidr, 2432 classful)
      
      Largest number of  cidr routes:                   1112 announced by  AS705
      Largest number of classful routes:                1652 announced by AS1221
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 29Dec00 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS1221      1652     1215      437   26.5%   TELSTRA-AS
      AS701       1581     1426      155    9.8%   Alternet
      AS271        284      131      153   53.9%   BCnet Backbone
      AS7545       189       67      122   64.6%   TPG Internet Pty Ltd
      AS9269       165       46      119   72.1%   Hong Kong CTI
      AS8013       449      344      105   23.4%   PSINET-CA
      AS6595       162       63       99   61.1%   DODDSEUR
      AS7657       253      164       89   35.2%   The Internet Group Limited
      AS2563       127       40       87   68.5%   KoRean Education Network
      AS705        326      241       85   26.1%   ALTERNET-AS
      AS4755       209      124       85   40.7%   Videsh Sanchar Nigam Ltd. India
      AS4293       341      258       83   24.3%   Internal ASN for C&W
      AS174        527      448       79   15.0%   Performance Systems International
      AS7496       100       22       78   78.0%   Power Up
      AS4151       278      201       77   27.7%   USDA Internet Access Network
      AS1727       187      111       76   40.6%   MRMS-WEST
      AS7046       329      254       75   22.8%   UUNET-CUSTOMER
      AS724        244      172       72   29.5%   DLA-ASNBLOCK-AS
      AS3908       233      161       72   30.9%   Supernet, Inc.
      AS1942       137       65       72   52.6%   FR-CICG-GRENOBLE
      AS13999       79        7       72   91.1%   UNKNOWN
      AS577        240      170       70   29.2%   Bell Backbone
      AS7018       594      527       67   11.3%   AT&T WorldNet Service Backbone
      AS5106       101       37       64   63.4%   AADS-COLUMBUS
      AS3749       122       58       64   52.5%   TECNET
      AS3602       307      244       63   20.5%   Sprint Canada Inc.
      AS226        167      104       63   37.7%   USC/Information Sciences Institut
      AS2548       365      308       57   15.6%   DIGEX-AS
      AS16758       63        6       57   90.5%   UNKNOWN
      AS376        133       77       56   42.1%   RISQ
      
      
      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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