The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 23 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 23 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            A summary of the last weeks changes in terms of withdrawn and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 23Jan98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      160198	48136
      170198	47944
      180198	47971
      190198	48017
      200198	48183
      210198	48498
      220198	48637
      230198	48658
      
      Check http://www.employees.org/~tbates/cidr.plot.html for a plot
      of the table history.
      
      
      Possible Bogus Routes
      ---------------------
      
      *** Bogus 212.192.0.0/16 from AS5568
      *** Bogus 212.255.0.0/16 from AS2871
      
      AS Summary
      ----------
      
      Number of ASes in routing system:                 3149
      
      Number of ASes announcing only one prefix:        1462 (756 cidr, 706 classful)
      
      Largest number of  cidr routes:                    450 announced by AS3561
      Largest number of classful routes:                1005 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 23Jan98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       705      396      309   43.8%   iSTAR Internet, Inc.
      AS6235       489      254      235   48.1%   Intermedia Communications, Inc.
      AS4293       425      211      214   50.4%   IMCI
      AS174        875      671      204   23.3%   Performance Systems International
      AS816        581      404      177   30.5%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       453      301      152   33.6%   Sprint Canada Inc.
      AS3749       201       60      141   70.1%   TECNET
      AS701       1005      896      109   10.8%   Alternet
      AS3751       123       47       76   61.8%   SNET-AS
      AS2048       161       91       70   43.5%   LaNet
      AS5668       106       40       66   62.3%   Century Telephone Inc.
      AS3804       203      141       62   30.5%   Bell Solutions
      AS1          846      787       59    7.0%   BBNPLANET
      AS549        216      159       57   26.4%   ONet Backbone
      AS271        111       56       55   49.5%   BCnet Backbone
      AS3464       116       63       53   45.7%   Alabama Research and Education Ne
      AS1239       578      526       52    9.0%   SprintLink Backbone
      AS7545       114       66       48   42.1%   TPG Internet Pty Ltd
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS4763       127       79       48   37.8%   Telstra New Zealand
      AS719        507      461       46    9.1%   LANLINK autonomous system
      AS684         84       39       45   53.6%   Manitoba Regional Network Backbon
      AS1221       257      212       45   17.5%   AARNET-AS
      AS2711        97       55       42   43.3%   SUNBELT-AS
      AS3561       922      881       41    4.4%   MCI
      AS6335        62       24       38   61.3%   NTRNET
      AS4740       333      295       38   11.4%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS4682        62       24       38   61.3%   ITJ Intelligent Telecom Inc.,
      AS1691       161      123       38   23.6%   BCTEL
      AS6332        83       46       37   44.6%   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
      _________________________________________________________________________
      To unsubscribe: send "unsubscribe" to apops-request at apnic dot net
      ------------------------------------------------------------------------