The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 13 Feb 1998 12:00:02 -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 Feb 13 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            A summary of the last weeks changes in terms of withdrawn and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 13Feb98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      290198	50396
      300198	50242
      310198	49848
      010298	49715
      020298	49739
      030298	49600
      040298	49877
      050298	49484
      
      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:                 2407
      
      Number of ASes announcing only one prefix:         718 (0 cidr, 718 classful)
      
      Largest number of  cidr routes:                      0 announced by       
      Largest number of classful routes:                1044 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 13Feb98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       691      368      323   46.7%   iSTAR Internet, Inc.
      AS6235       495      252      243   49.1%   Intermedia Communications, Inc.
      AS4293       430      210      220   51.2%   IMCI
      AS174        874      673      201   23.0%   Performance Systems International
      AS816        635      444      191   30.1%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       455      304      151   33.2%   Sprint Canada Inc.
      AS3749       202       61      141   69.8%   TECNET
      AS701       1044      931      113   10.8%   Alternet
      AS3336       109       19       90   82.6%   Internet Services, Kolumbus proje
      AS3751       125       48       77   61.6%   SNET-AS
      AS5668       107       40       67   62.6%   Century Telephone Inc.
      AS3804       204      142       62   30.4%   WORLDLINX
      AS2048       154       92       62   40.3%   LaNet
      AS1239       596      534       62   10.4%   SprintLink Backbone
      AS3221        92       33       59   64.1%   EENet Autonomous System
      AS1          840      782       58    6.9%   BBNPLANET
      AS271        110       55       55   50.0%   BCNET-AS
      AS719        519      468       51    9.8%   LANLINK autonomous system
      AS549        214      163       51   23.8%   ONET-AS
      AS3464       115       64       51   44.3%   Alabama Research and Education Ne
      AS1221       263      214       49   18.6%   AARNET-AS
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS4763       128       80       48   37.5%   Telstra New Zealand
      AS7545       114       69       45   39.5%   TPG Internet Pty Ltd
      AS684         86       42       44   51.2%   MBNET-AS
      AS4740       354      312       42   11.9%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS2711        97       55       42   43.3%   SUNBELT-AS
      AS7046       130       89       41   31.5%   UUNET-CUSTOMER
      AS3561       897      857       40    4.5%   MCI
      AS852        156      117       39   25.0%   CANET-ASN
      
      
      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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