[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, 29 May 1998 12:00:01 -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 May 29 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            A summary of the last weeks changes in terms of withdrawn and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 29May98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      220598	51216
      230598	51177
      240598	51178
      250598	51283
      260598	51277
      270598	51199
      280598	51156
      290598	50967
      
      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:                 3606
      
      Number of ASes announcing only one prefix:        1730 (908 cidr, 822 classful)
      
      Largest number of  cidr routes:                    359 announced by AS3561
      Largest number of classful routes:                1096 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 29May98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS816        807      522      285   35.3%   UUNET Canada (ASN-UUNETCA-AS4)
      AS4293       468      238      230   49.1%   IMCI
      AS2493       500      294      206   41.2%   iSTAR Internet, Inc.
      AS174        815      626      189   23.2%   Performance Systems International
      AS3602       493      310      183   37.1%   Sprint Canada Inc.
      AS701       1096      918      178   16.2%   Alternet
      AS3749       220       65      155   70.5%   TECNET
      AS2048       164       92       72   43.9%   LaNet
      AS5668       115       46       69   60.0%   Century Telephone Inc.
      AS3221       110       41       69   62.7%   EENet Autonomous System
      AS3248       129       61       68   52.7%   VIAnet
      AS4755        95       28       67   70.5%   Videsh Sanchar Nigam Ltd. India
      AS10928      108       44       64   59.3%   UNKNOWN
      AS271        113       54       59   52.2%   BCnet Backbone
      AS7046       190      132       58   30.5%   UUNET-CUSTOMER
      AS3804       200      142       58   29.0%   Bell Solutions
      AS549        206      154       52   25.2%   ONet Backbone
      AS4539        74       24       50   67.6%   NETROPOLIS
      AS1221       274      224       50   18.2%   AARNET-AS
      AS72          85       37       48   56.5%   Schlumberger Information Network
      AS6335        67       19       48   71.6%   NTRNET
      AS1239       541      494       47    8.7%   SprintLink Backbone
      AS4740       357      314       43   12.0%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS852        159      118       41   25.8%   AGT Advance Communication
      AS4200       136       96       40   29.4%   AGIS (Apex Global Information Ser
      AS1591       144      105       39   27.1%   SAIC DISM
      AS719        442      404       38    8.6%   LANLINK autonomous system
      AS3493       165      127       38   23.0%   INTERLINK
      AS6392        68       31       37   54.4%   MidWest Communications, Inc.
      AS6181        65       28       37   56.9%   FUSE-NET
      
      
      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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