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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jun 12 15:24:19 1998

This is an auto-generated mail on Fri Jun 12 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      A summary of the last weeks changes in terms of withdrawn and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 12Jun98


0) General Status

Table History
-------------

Date	Prefixes
050698	50625
060698	51451
070698	51501
080698	51191
090698	51499
100698	51418
110698	51862
120698	51404

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:                 3625

Number of ASes announcing only one prefix:        1735 (917 cidr, 818 classful)

Largest number of  cidr routes:                    357 announced by AS3561
Largest number of classful routes:                1128 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 12Jun98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       463      240      223   48.2%   IMCI
AS2493       501      291      210   41.9%   iSTAR Internet, Inc.
AS3602       506      313      193   38.1%   Sprint Canada Inc.
AS1740       545      353      192   35.2%   CERFnet
AS701       1128      939      189   16.8%   Alternet
AS3749       220       65      155   70.5%   TECNET
AS174        728      583      145   19.9%   Performance Systems International
AS4262       213      125       88   41.3%   CERFnet Los Angeles SMDS
AS3221       112       42       70   62.5%   EENet Autonomous System
AS4755        98       31       67   68.4%   Videsh Sanchar Nigam Ltd. India
AS10928      109       43       66   60.6%   UNKNOWN
AS7046       207      142       65   31.4%   UUNET-CUSTOMER
AS5668       114       49       65   57.0%   Century Telephone Inc.
AS3804       206      144       62   30.1%   Bell Solutions
AS271        113       54       59   52.2%   BCnet Backbone
AS1221       289      233       56   19.4%   AARNET-AS
AS549        205      152       53   25.9%   ONet Backbone
AS4740       375      323       52   13.9%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS4539        74       24       50   67.6%   NETROPOLIS
AS72          85       37       48   56.5%   Schlumberger Information Network
AS6335        68       20       48   70.6%   NTRNET
AS8517       122       75       47   38.5%   ULAKNET-ASN
AS4200       148      101       47   31.8%   AGIS (Apex Global Information Ser
AS1239       541      494       47    8.7%   SprintLink Backbone
AS852        159      118       41   25.8%   AGT Advance Communication
AS7657       122       84       38   31.1%   The Internet Group Limited
AS762        115       78       37   32.2%   WELLFLEET-AS
AS719        443      406       37    8.4%   LANLINK autonomous system
AS6181        65       28       37   56.9%   FUSE-NET
AS803         72       36       36   50.0%   SaskNet Backbone


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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