The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 26 Dec 1997 12:00:01 -0800
  • 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 Dec 26 12:00:00 PST 1997
      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            A summary of the last weeks changes in terms of withdrawn and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 26Dec97
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      191297	46949
      201297	46969
      211297	46910
      221297	46996
      231297	47516
      241297	47566
      251297	47463
      261297	47433
      
      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:                 1662
      
      Number of ASes announcing only one prefix:         778 (143 cidr, 635 classful)
      
      Largest number of  cidr routes:                    121 announced by AS3561
      Largest number of classful routes:                 583 announced by    AS1
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 26Dec97 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS4293       201      102       99   49.3%   IMCI
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS719        505      460       45    8.9%   LANLINK autonomous system
      AS174        298      258       40   13.4%   Performance Systems International
      AS271         80       46       34   42.5%   BCnet Backbone
      AS1          583      551       32    5.5%   BBNPLANET
      AS1257       296      265       31   10.5%   SWIPnet Swedish IP Network
      AS701        473      443       30    6.3%   Alternet
      AS2493        97       73       24   24.7%   iSTAR Internet, Inc.
      AS5381        58       36       22   37.9%   PowerTech Information Systems AS
      AS8517        75       55       20   26.7%   ULAKNET-ASN
      AS6822        37       19       18   48.6%   SuperOnline autonomous system
      AS6663        35       17       18   51.4%   InterComp Bucharest
      AS3663        25        7       18   72.0%   NETNET-NET
      AS3563        59       41       18   30.5%   Pilot Network Services, Inc.
      AS2048        45       28       17   37.8%   LaNet
      AS2561        36       20       16   44.4%   Egyptian Networks
      AS6897        32       17       15   46.9%   Global-One Spain
      AS3564        29       15       14   48.3%   Microserve Infromation Systems In
      AS2907       110       96       14   12.7%   SINET
      AS1239       268      254       14    5.2%   SprintLink Backbone
      AS6846        30       17       13   43.3%   UKRPACK.NET
      AS1785       162      149       13    8.0%   NYSERNet Backbone
      AS5666        35       23       12   34.3%   Omnes - A Schlumberger and Cable 
      AS4000        74       62       12   16.2%   Global IP
      AS2752        38       26       12   31.6%   THOMSONCA-AS
      AS549         93       82       11   11.8%   ONet Backbone
      AS3577        30       19       11   36.7%   PREPnet-WEST
      AS2686        46       35       11   23.9%   Autonomous System number for IBM 
      AS816         54       44       10   18.5%   UUNET Canada (ASN-UUNETCA-AS4)
      
      
      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
      _________________________________________________________________________
      To unsubscribe: send "unsubscribe" to apops-request at apnic dot net
      ------------------------------------------------------------------------