The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 16 Jan 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 Jan 16 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            A summary of the last weeks changes in terms of withdrawn and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 16Jan98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      090198	47514
      100198	47408
      110198	47661
      120198	47816
      130198	47654
      140198	47809
      150198	47905
      160198	48136
      
      Check http://www.employees.org/~tbates/cidr.plot.html for a plot
      of the table history.
      
      
      Possible Bogus Routes
      ---------------------
      
      *** Bogus 98.6.10.0/24 from AS701
      
      AS Summary
      ----------
      
      Number of ASes in routing system:                 3118
      
      Number of ASes announcing only one prefix:        1448 (743 cidr, 705 classful)
      
      Largest number of  cidr routes:                    458 announced by AS3561
      Largest number of classful routes:                 991 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 16Jan98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       696      390      306   44.0%   iSTAR Internet, Inc.
      AS4293       417      205      212   50.8%   IMCI
      AS174        880      675      205   23.3%   Performance Systems International
      AS816        577      406      171   29.6%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       450      300      150   33.3%   Sprint Canada Inc.
      AS3749       201       60      141   70.1%   TECNET
      AS701        991      888      103   10.4%   Alternet
      AS3751       122       46       76   62.3%   SNET-AS
      AS721        352      278       74   21.0%   DLA-ASNBLOCK-AS
      AS2048       162       90       72   44.4%   LaNet
      AS5668       103       36       67   65.0%   Century Telephone Inc.
      AS3804       203      141       62   30.5%   Bell Solutions
      AS1          852      791       61    7.2%   BBNPLANET
      AS549        217      162       55   25.3%   ONet Backbone
      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       578      526       52    9.0%   SprintLink Backbone
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS4763       127       79       48   37.8%   Telstra New Zealand
      AS719        502      457       45    9.0%   LANLINK autonomous system
      AS1221       261      216       45   17.2%   AARNET-AS
      AS4648       194      150       44   22.7%   NZIX 2
      AS684         84       42       42   50.0%   Manitoba Regional Network Backbon
      AS3561       927      885       42    4.5%   MCI
      AS3493       194      154       40   20.6%   INTERLINK
      AS4740       331      292       39   11.8%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS2711        93       54       39   41.9%   SUNBELT-AS
      AS1691       161      123       38   23.6%   BCTEL
      AS6332        81       44       37   45.7%   TELNOR
      
      
      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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