[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, 27 Oct 2000 12:00:04 -0700
  • 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 Oct 27 12:00:00 PDT 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            A summary of the last weeks changes in terms of withdrawn and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 27Oct00
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      201000	89411
      211000	89037
      221000	89088
      231000	89255
      241000	89314
      251000	89441
      261000	89651
      271000	89717
      
      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:                 8876
      
      Number of ASes announcing only one prefix:        5070 (2831 cidr, 2239 classful)
      
      Largest number of  cidr routes:                    923 announced by  AS701
      Largest number of classful routes:                1138 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 27Oct00 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS271        421      148      273   64.8%   BCnet Backbone
      AS1221       590      439      151   25.6%   TELSTRA-AS
      AS9269       180       47      133   73.9%   Hong Kong CTI
      AS816        549      421      128   23.3%   UUNET Canada (ASN-UUNETCA-AS4)
      AS2609       128        8      120   93.8%   EUnet-TN
      AS6429       226      112      114   50.4%   FirstCom Internet
      AS9304       130       17      113   86.9%   Hutchcity
      AS8013       464      360      104   22.4%   PSINET-CA
      AS7545       159       55      104   65.4%   TPG Internet Pty Ltd
      AS4755       200      102       98   49.0%   Videsh Sanchar Nigam Ltd. India
      AS705        356      259       97   27.2%   ALTERNET-AS
      AS7657       312      217       95   30.4%   The Internet Group Limited
      AS7046       347      255       92   26.5%   UUNET-CUSTOMER
      AS7496       128       37       91   71.1%   Power Up
      AS174        542      456       86   15.9%   Performance Systems International
      AS701       1138     1055       83    7.3%   Alternet
      AS4293       340      258       82   24.1%   Internal ASN for C&W
      AS13999       91        9       82   90.1%   UNKNOWN
      AS6595       138       57       81   58.7%   DODDSEUR
      AS3908       251      172       79   31.5%   Supernet, Inc.
      AS577        247      176       71   28.7%   Bell Backbone
      AS724        218      151       67   30.7%   DLA-ASNBLOCK-AS
      AS7018       582      516       66   11.3%   AT&T WorldNet Service Backbone
      AS5106       100       37       63   63.0%   AADS-COLUMBUS
      AS226        169      107       62   36.7%   USC/Information Sciences Institut
      AS3749       118       57       61   51.7%   TECNET
      AS1727       149       88       61   40.9%   MRMS-WEST
      AS16758       63        6       57   90.5%   UNKNOWN
      AS376        131       75       56   42.7%   RISQ
      AS8151       180      126       54   30.0%   UNINET-MX
      
      
      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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