[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 Jul 1998 12:00:02 -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@apnic.net
    • 
      This is an auto-generated mail on Fri Jul 24 12:00:00 PDT 1998
      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            A summary of the last weeks changes in terms of withdrawn and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 24Jul98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      170798	52681
      180798	52642
      190798	52713
      200798	52774
      210798	53149
      220798	52850
      230798	52922
      240798	52857
      
      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:                 3754
      
      Number of ASes announcing only one prefix:        1827 (958 cidr, 869 classful)
      
      Largest number of  cidr routes:                    353 announced by AS3561
      Largest number of classful routes:                1137 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 24Jul98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS3602       525      313      212   40.4%   Sprint Canada Inc.
      AS701       1137      934      203   17.9%   Alternet
      AS271        344      144      200   58.1%   BCnet Backbone
      AS4293       469      273      196   41.8%   IMCI
      AS2493       432      254      178   41.2%   iSTAR Internet, Inc.
      AS3749       223       66      157   70.4%   TECNET
      AS174        723      586      137   18.9%   Performance Systems International
      AS2685       267      162      105   39.3%   IBM Global Network - US
      AS5668       134       50       84   62.7%   Century Telephone Inc.
      AS3221       112       42       70   62.5%   RIPE-ASNBLOCK4
      AS4969        86       20       66   76.7%   Net Access
      AS3804       220      155       65   29.5%   Bell Solutions
      AS4755       114       50       64   56.1%   Videsh Sanchar Nigam Ltd. India
      AS7046       228      165       63   27.6%   UUNET-CUSTOMER
      AS4740       393      336       57   14.5%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS10928      101       46       55   54.5%   UNKNOWN
      AS3403       180      126       54   30.0%   TIAC
      AS8517       122       72       50   41.0%   UNKNOWN
      AS6335        68       19       49   72.1%   NTRNET
      AS549        202      153       49   24.3%   ONet Backbone
      AS72          85       37       48   56.5%   Schlumberger Information Network
      AS1239       539      492       47    8.7%   SprintLink Backbone
      AS719        452      406       46   10.2%   LANLINK-AS
      AS4539        71       26       45   63.4%   NETROPOLIS
      AS4200       144       99       45   31.2%   AGIS (Apex Global Information Ser
      AS852        157      116       41   26.1%   AGT Advance Communication
      AS1785       293      252       41   14.0%   NYSERNet Backbone
      AS10459       48        7       41   85.4%   WANSASN
      AS10921       57       19       38   66.7%   KIHNETWORK
      AS762        117       80       37   31.6%   WELLFLEET-AS
      
      
      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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