[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, 21 Aug 1998 12:00:05 -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 Aug 21 12:00:02 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            A summary of the last weeks changes in terms of withdrawn and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 21Aug98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      130898	52878
      150898	52681
      160898	52695
      170898	52882
      180898	54822
      190898	52846
      200898	52926
      210898	52842
      
      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:                 3903
      
      Number of ASes announcing only one prefix:        1880 (974 cidr, 906 classful)
      
      Largest number of  cidr routes:                    351 announced by AS3561
      Largest number of classful routes:                1189 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 21Aug98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS701       1189      955      234   19.7%   Alternet
      AS3602       552      321      231   41.8%   Sprint Canada Inc.
      AS271        337      146      191   56.7%   BCnet Backbone
      AS4293       435      248      187   43.0%   IMCI
      AS2493       387      229      158   40.8%   iSTAR Internet, Inc.
      AS3749       224       67      157   70.1%   TECNET
      AS174        717      583      134   18.7%   Performance Systems International
      AS4200       195      100       95   48.7%   AGIS (Apex Global Information Ser
      AS5668       130       44       86   66.2%   Century Telephone Inc.
      AS2685       240      157       83   34.6%   IBM Global Network - US
      AS4755       121       46       75   62.0%   Videsh Sanchar Nigam Ltd. India
      AS4740       408      337       71   17.4%   Ozemail Pty Ltd (ASN-OZEMAIL)
      AS3221       112       42       70   62.5%   EENet Autonomous System
      AS7046       228      164       64   28.1%   UUNET-CUSTOMER
      AS3804       214      156       58   27.1%   Bell Solutions
      AS549        199      145       54   27.1%   ONet Backbone
      AS3403       181      127       54   29.8%   TIAC
      AS8517       124       72       52   41.9%   ULAKNET-ASN
      AS10928      100       48       52   52.0%   UNKNOWN
      AS719        462      413       49   10.6%   LANLINK autonomous system
      AS6335        69       20       49   71.0%   NTRNET
      AS72          87       39       48   55.2%   Schlumberger Information Network
      AS1239       527      479       48    9.1%   SprintLink Backbone
      AS4539        71       24       47   66.2%   NETROPOLIS
      AS803         78       34       44   56.4%   SaskNet Backbone
      AS1785       301      258       43   14.3%   NYSERNet Backbone
      AS852        157      117       40   25.5%   AGT Advance Communication
      AS6181        66       26       40   60.6%   FUSE-NET
      AS7122       120       82       38   31.7%   MTS ADVANCED Network Policy
      AS226        108       72       36   33.3%   USC/Information Sciences Institut
      
      
      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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