[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, 10 Apr 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 Apr 10 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            A summary of the last weeks changes in terms of withdrawn and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 10Apr98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      030498	50479
      040498	50660
      050498	50519
      060498	50595
      070498	50748
      080498	50724
      090498	50529
      100498	50729
      
      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:                 3448
      
      Number of ASes announcing only one prefix:        1614 (846 cidr, 768 classful)
      
      Largest number of  cidr routes:                    412 announced by AS3561
      Largest number of classful routes:                1036 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 10Apr98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS4293       437      213      224   51.3%   IMCI
      AS2493       553      338      215   38.9%   iSTAR Internet, Inc.
      AS816        672      461      211   31.4%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       467      302      165   35.3%   Sprint Canada Inc.
      AS174        774      617      157   20.3%   Performance Systems International
      AS701       1036      881      155   15.0%   Alternet
      AS3749       218       63      155   71.1%   TECNET
      AS8505       154       34      120   77.9%   Middle East Technical University 
      AS2939       186       77      109   58.6%   SCAROLINA-AS
      AS2048       162       90       72   44.4%   LaNet
      AS11003      126       56       70   55.6%   UNKNOWN
      AS5668       116       47       69   59.5%   Century Telephone Inc.
      AS3221       107       39       68   63.6%   EENet Autonomous System
      AS271        112       53       59   52.7%   BCnet Backbone
      AS3804       199      141       58   29.1%   Bell Solutions
      AS10928       99       41       58   58.6%   UNKNOWN
      AS549        209      159       50   23.9%   ONet Backbone
      AS1239       538      488       50    9.3%   SprintLink Backbone
      AS1221       272      223       49   18.0%   AARNET-AS
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS4755        85       37       48   56.5%   Videsh Sanchar Nigam Ltd. India
      AS6392        79       32       47   59.5%   MidWest Communications, Inc.
      AS7046       154      108       46   29.9%   UUNET-CUSTOMER
      AS4763       122       76       46   37.7%   Telstra New Zealand
      AS1982       161      118       43   26.7%   Northwest Nexus, Inc.
      AS4740       351      309       42   12.0%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS852        157      117       40   25.5%   AGT Advance Communication
      AS684         92       52       40   43.5%   Manitoba Regional Network Backbon
      AS4200       134       95       39   29.1%   AGIS (Apex Global Information Ser
      AS3493       164      126       38   23.2%   INTERLINK
      
      
      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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