[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, 17 Jul 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 Jul 17 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            A summary of the last weeks changes in terms of withdrawn and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 17Jul98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      100798	52359
      110798	52365
      120798	52291
      130798	52391
      140798	52359
      150798	52389
      160798	52656
      170798	52681
      
      Check http://www.employees.org/~tbates/cidr.plot.html for a plot
      of the table history.
      
      
      Possible Bogus Routes
      ---------------------
      
      *** Bogus 213.102.1.0 from AS3259
      *** Bogus 214.0.0.0/8 from AS568
      *** Bogus 215.0.0.0/9 from AS568
      *** Bogus 216.0.0.0/14 from AS2548
      *** Bogus 216.13.0.0/19 from AS6401
      *** Bogus 216.13.32.0/19 from AS6401
      *** Bogus 216.15.0.0/19 from AS10368
      *** Bogus 216.15.128.0/19 from AS7393
      *** Bogus 216.16.0.0/19 from AS6304
      *** Bogus 216.18.0.0/19 from AS6539
      *** Bogus 216.19.0.0/18 from AS4492
      *** Bogus 216.22.0.0/19 from AS7960
      *** Bogus 216.23.0.0/19 from AS8079
      *** Bogus 216.27.0.0 from AS7349
      *** Bogus 216.214.0.0/18 from AS7194
      
      AS Summary
      ----------
      
      Number of ASes in routing system:                 3750
      
      Number of ASes announcing only one prefix:        1827 (964 cidr, 863 classful)
      
      Largest number of  cidr routes:                    360 announced by AS3561
      Largest number of classful routes:                1143 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 17Jul98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       485      278      207   42.7%   iSTAR Internet, Inc.
      AS3602       516      311      205   39.7%   Sprint Canada Inc.
      AS701       1143      941      202   17.7%   Alternet
      AS271        340      144      196   57.6%   BCnet Backbone
      AS4293       450      257      193   42.9%   IMCI
      AS3749       223       66      157   70.4%   TECNET
      AS174        731      589      142   19.4%   Performance Systems International
      AS2685       266      161      105   39.5%   IBM Global Network - US
      AS5668       135       49       86   63.7%   Century Telephone Inc.
      AS2764       428      347       81   18.9%   connect.com.au pty ltd
      AS4755       117       41       76   65.0%   Videsh Sanchar Nigam Ltd. India
      AS3221       112       42       70   62.5%   EENet Autonomous System
      AS3804       220      155       65   29.5%   Bell Solutions
      AS7046       228      165       63   27.6%   UUNET-CUSTOMER
      AS4740       401      344       57   14.2%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS10928      102       45       57   55.9%   UNKNOWN
      AS3403       179      127       52   29.1%   TIAC
      AS8517       123       72       51   41.5%   ULAKNET-ASN
      AS6335        68       19       49   72.1%   NTRNET
      AS72          85       37       48   56.5%   Schlumberger Information Network
      AS1239       540      493       47    8.7%   SprintLink Backbone
      AS719        450      404       46   10.2%   LANLINK autonomous system
      AS4539        71       26       45   63.4%   NETROPOLIS
      AS4200       142       97       45   31.7%   AGIS (Apex Global Information Ser
      AS852        157      116       41   26.1%   AGT Advance Communication
      AS762        118       80       38   32.2%   WELLFLEET-AS
      AS1785       287      249       38   13.2%   NYSERNet Backbone
      AS6392        66       29       37   56.1%   MidWest Communications, Inc.
      AS6181        65       28       37   56.9%   FUSE-NET
      AS549        174      137       37   21.3%   ONet Backbone
      
      
      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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