[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, 04 Sep 1998 12:00:03 -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 Sep  4 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            A summary of the last weeks changes in terms of withdrawn and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 04Sep98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      280898	53151
      290898	53143
      300898	53149
      310898	53251
      010998	53157
      020998	53162
      030998	53176
      040998	52828
      
      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:                 3962
      
      Number of ASes announcing only one prefix:        1903 (997 cidr, 906 classful)
      
      Largest number of  cidr routes:                    350 announced by  AS701
      Largest number of classful routes:                1174 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 04Sep98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS701       1174      950      224   19.1%   Alternet
      AS271        349      152      197   56.4%   BCnet Backbone
      AS4293       445      260      185   41.6%   IMCI
      AS3749       224       67      157   70.1%   TECNET
      AS2493       374      219      155   41.4%   iSTAR Internet, Inc.
      AS174        696      569      127   18.2%   Performance Systems International
      AS4200       192       98       94   49.0%   AGIS (Apex Global Information Ser
      AS5668       133       42       91   68.4%   Century Telephone Inc.
      AS2685       234      154       80   34.2%   IBM Global Network - US
      AS4755       124       47       77   62.1%   Videsh Sanchar Nigam Ltd. India
      AS4740       419      344       75   17.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
      AS3221       116       45       71   61.2%   EENet Autonomous System
      AS7046       236      171       65   27.5%   UUNET-CUSTOMER
      AS3493       220      156       64   29.1%   INTERLINK
      AS3804       215      157       58   27.0%   Bell Solutions
      AS3403       182      127       55   30.2%   TIAC
      AS549        203      150       53   26.1%   ONet Backbone
      AS8517       123       71       52   42.3%   ULAKNET-ASN
      AS10928      100       48       52   52.0%   UNKNOWN
      AS719        469      418       51   10.9%   LANLINK autonomous system
      AS6335        69       20       49   71.0%   NTRNET
      AS72          87       39       48   55.2%   Schlumberger Information Network
      AS1239       552      504       48    8.7%   SprintLink Backbone
      AS803         78       34       44   56.4%   SaskNet Backbone
      AS6181        66       26       40   60.6%   FUSE-NET
      AS4539        67       27       40   59.7%   NETROPOLIS
      AS852        158      119       39   24.7%   AGT Advance Communication
      AS7122       119       80       39   32.8%   MTS ADVANCED Network Policy
      AS10459       45       10       35   77.8%   WANSASN
      AS4763       100       66       34   34.0%   Telstra New Zealand
      
      
      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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