The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 09 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  9 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            A summary of the last weeks changes in terms of withdrawn and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 09Jan98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      020198	47531
      030198	47597
      040198	35241
      050198	47479
      060198	47617
      070198	47694
      080198	47566
      090198	47514
      
      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:                 3094
      
      Number of ASes announcing only one prefix:        1455 (749 cidr, 706 classful)
      
      Largest number of  cidr routes:                    463 announced by AS3561
      Largest number of classful routes:                 985 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 09Jan98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       668      376      292   43.7%   iSTAR Internet, Inc.
      AS4293       414      202      212   51.2%   IMCI
      AS174        890      681      209   23.5%   Performance Systems International
      AS816        568      396      172   30.3%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       447      300      147   32.9%   Sprint Canada Inc.
      AS3749       201       60      141   70.1%   TECNET
      AS701        985      884      101   10.3%   Alternet
      AS839        123       31       92   74.8%   North West Territories Regional N
      AS3751       122       46       76   62.3%   SNET-AS
      AS2048       164       92       72   43.9%   LaNet
      AS5668       103       36       67   65.0%   Century Telephone Inc.
      AS3804       203      139       64   31.5%   Bell Solutions
      AS1          863      804       59    6.8%   BBNPLANET
      AS3464       120       65       55   45.8%   Alabama Research and Education Ne
      AS271        111       56       55   49.5%   BCnet Backbone
      AS7545       115       63       52   45.2%   TPG Internet Pty Ltd
      AS1239       581      529       52    9.0%   SprintLink Backbone
      AS4763       127       76       51   40.2%   Telstra New Zealand
      AS4648       196      146       50   25.5%   NZIX 2
      AS549        202      153       49   24.3%   ONet Backbone
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS719        506      460       46    9.1%   LANLINK autonomous system
      AS1221       258      213       45   17.4%   AARNET-AS
      AS3561       934      892       42    4.5%   MCI
      AS684         83       43       40   48.2%   Manitoba Regional Network Backbon
      AS4740       332      293       39   11.7%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS2711        94       55       39   41.5%   SUNBELT-AS
      AS1691       165      126       39   23.6%   BCTEL
      AS6181        60       24       36   60.0%   FUSE-NET
      AS1591       137      101       36   26.3%   SAIC DISM
      
      
      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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