[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, 22 May 1998 12:00:02 -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 22 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            A summary of the last weeks changes in terms of withdrawn and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 22May98
      
      
      0) General Status
      
      Table History
      -------------
      
      Date	Prefixes
      150598	51370
      160598	51935
      170598	51899
      180598	51874
      190598	51446
      200598	51474
      210598	51210
      220598	51216
      
      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:                 3581
      
      Number of ASes announcing only one prefix:        1707 (896 cidr, 811 classful)
      
      Largest number of  cidr routes:                    364 announced by AS3561
      Largest number of classful routes:                1082 announced by  AS701
      
      
      
      1) Gains by aggregating at the origin AS level
      
       --- 22May98 ---
      ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description
      
      AS816        800      516      284   35.5%   UUNET Canada (ASN-UUNETCA-AS4)
      AS4293       464      240      224   48.3%   IMCI
      AS2493       527      308      219   41.6%   iSTAR Internet, Inc.
      AS174        809      625      184   22.7%   Performance Systems International
      AS701       1082      904      178   16.5%   Alternet
      AS3602       483      305      178   36.9%   Sprint Canada Inc.
      AS2048       161       89       72   44.7%   LaNet
      AS3248       130       60       70   53.8%   VIAnet
      AS5668       115       46       69   60.0%   Century Telephone Inc.
      AS3221       110       41       69   62.7%   EENet Autonomous System
      AS7046       193      133       60   31.1%   UUNET-CUSTOMER
      AS271        112       53       59   52.7%   BCnet Backbone
      AS4755        88       32       56   63.6%   Videsh Sanchar Nigam Ltd. India
      AS3804       196      140       56   28.6%   Bell Solutions
      AS549        208      155       53   25.5%   ONet Backbone
      AS1221       277      226       51   18.4%   AARNET-AS
      AS72          85       37       48   56.5%   Schlumberger Information Network
      AS4539        73       26       47   64.4%   NETROPOLIS
      AS1239       538      491       47    8.7%   SprintLink Backbone
      AS6335        66       23       43   65.2%   NTRNET
      AS4740       366      323       43   11.7%   ASN-OZEMAIL (Ozemail Pty Ltd)
      AS852        157      117       40   25.5%   AGT Advance Communication
      AS4200       130       90       40   30.8%   AGIS (Apex Global Information Ser
      AS10928       86       46       40   46.5%   UNKNOWN
      AS684         94       55       39   41.5%   Manitoba Regional Network Backbon
      AS7657       129       91       38   29.5%   The Internet Group Limited
      AS3493       165      127       38   23.0%   INTERLINK
      AS1591       140      102       38   27.1%   SAIC DISM
      AS762        116       79       37   31.9%   WELLFLEET-AS
      AS719        440      403       37    8.4%   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
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