The Cidr Report

  • To: nanog at merit dot edu
  • Subject: The Cidr Report
  • From: Tony Bates <tbates at cisco dot com>
  • Date: Fri, 20 Feb 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 Feb 20 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            A summary of the last weeks changes in terms of withdrawn and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 20Feb98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      050298	49484
      140298	49400
      150298	49226
      160298	49509
      170298	49589
      180298	49307
      190298	49418
      200298	49181
      
      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:                 3244
      
      Number of ASes announcing only one prefix:        1560 (801 cidr, 759 classful)
      
      Largest number of  cidr routes:                    441 announced by AS3561
      Largest number of classful routes:                1074 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 20Feb98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS2493       707      435      272   38.5%   iSTAR Internet, Inc.
      AS6235       525      261      264   50.3%   Intermedia Communications, Inc.
      AS4293       434      210      224   51.6%   IMCI
      AS816        585      420      165   28.2%   UUNET Canada (ASN-UUNETCA-AS4)
      AS3602       458      305      153   33.4%   Sprint Canada Inc.
      AS174        775      627      148   19.1%   Performance Systems International
      AS3749       198       55      143   72.2%   TECNET
      AS701       1074      950      124   11.5%   Alternet
      AS3751       125       48       77   61.6%   SNET-AS
      AS5668       109       37       72   66.1%   Century Telephone Inc.
      AS3804       204      142       62   30.4%   WORLDLINX
      AS1239       590      528       62   10.5%   SprintLink Backbone
      AS3221        92       32       60   65.2%   EENet Autonomous System
      AS271        112       56       56   50.0%   BCNET-AS
      AS3464       121       66       55   45.5%   Alabama Research and Education Ne
      AS72          84       36       48   57.1%   Schlumberger Information Network
      AS1221       263      215       48   18.3%   AARNET-AS
      AS549        205      158       47   22.9%   ONET-AS
      AS4755        78       34       44   56.4%   Videsh Sanchar Nigam Ltd. India
      AS2711        98       55       43   43.9%   SUNBELT-AS
      AS7046       131       89       42   32.1%   UUNET-CUSTOMER
      AS3561       883      842       41    4.6%   MCI
      AS852        157      117       40   25.5%   CANET-ASN
      AS684         86       46       40   46.5%   MBNET-AS
      AS6335        63       23       40   63.5%   NTRNET
      AS4740       348      308       40   11.5%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS1          789      749       40    5.1%   BBNPLANET
      AS6181        63       24       39   61.9%   FUSE-NET
      AS3493       166      128       38   22.9%   INTERLINK
      AS719        432      395       37    8.6%   LANLINK autonomous system
      
      
      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
      ------------------------------------------------------------------------