The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 02 Jan 1998 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 Jan  2 12:00:00 PST 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            A summary of the last weeks changes in terms of withdrawn and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 02Jan98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      261297	47433
      271297	47424
      281297	47380
      291297	47497
      301297	47601
      311297	47560
      010198	47266
      020198	47531
      
      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:                 3075
      
      Number of ASes announcing only one prefix:        1452 (758 cidr, 694 classful)
      
      Largest number of  cidr routes:                    521 announced by AS3561
      Largest number of classful routes:                 973 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 02Jan98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       698      391      307   44.0%   iSTAR Internet, Inc.
      AS4293       417      199      218   52.3%   IMCI
      AS174        882      675      207   23.5%   Performance Systems International
      AS816        571      399      172   30.1%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       457      300      157   34.4%   Sprint Canada Inc.
      AS3749       190       54      136   71.6%   TECNET
      AS701        973      878       95    9.8%   Alternet
      AS839        123       31       92   74.8%   North West Territories Regional N
      AS3751       119       46       73   61.3%   SNET-AS
      AS5668       102       37       65   63.7%   Century Telephone Inc.
      AS2048       153       88       65   42.5%   LaNet
      AS3804       202      140       62   30.7%   Bell Solutions
      AS1          869      808       61    7.0%   BBNPLANET
      AS549        218      161       57   26.1%   ONet Backbone
      AS271        111       56       55   49.5%   BCnet Backbone
      AS7545       115       63       52   45.2%   TPG Internet Pty Ltd
      AS3464       119       67       52   43.7%   Alabama Research and Education Ne
      AS1239       580      528       52    9.0%   SprintLink Backbone
      AS4763       126       75       51   40.5%   Telstra New Zealand
      AS4747       114       64       50   43.9%   Taiwan Telecommunication Network 
      AS4648       190      140       50   26.3%   NZIX 2
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS719        505      460       45    8.9%   LANLINK autonomous system
      AS3561       936      894       42    4.5%   MCI
      AS1221       256      215       41   16.0%   AARNET-AS
      AS684         82       43       39   47.6%   Manitoba Regional Network Backbon
      AS6181        60       21       39   65.0%   FUSE-NET
      AS4740       330      291       39   11.8%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS2711        96       57       39   40.6%   SUNBELT-AS
      AS1691       164      125       39   23.8%   BCTEL
      
      
      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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