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The Cidr Report

  • From: Tony Bates
  • Date: Fri Aug 07 15:49:35 1998

This is an auto-generated mail on Fri Aug  7 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      A summary of the last weeks changes in terms of withdrawn and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 07Aug98


0) General Status

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

Date	Prefixes
310798	52941
010898	52807
020898	52843
030898	52915
040898	52856
050898	52828
060898	52871
070898	52903

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:                 3804

Number of ASes announcing only one prefix:        1844 (971 cidr, 873 classful)

Largest number of  cidr routes:                    343 announced by AS3561
Largest number of classful routes:                1137 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07Aug98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS3602       551      320      231   41.9%   Sprint Canada Inc.
AS701       1137      934      203   17.9%   Alternet
AS271        333      143      190   57.1%   BCnet Backbone
AS4293       438      254      184   42.0%   IMCI
AS2493       406      240      166   40.9%   iSTAR Internet, Inc.
AS3749       222       69      153   68.9%   TECNET
AS174        719      587      132   18.4%   Performance Systems International
AS4200       192      100       92   47.9%   AGIS (Apex Global Information Ser
AS2685       243      157       86   35.4%   IBM Global Network - US
AS5668       129       47       82   63.6%   Century Telephone Inc.
AS4755       121       45       76   62.8%   Videsh Sanchar Nigam Ltd. India
AS3221       112       42       70   62.5%   EENet Autonomous System
AS7046       226      160       66   29.2%   UNKNOWN
AS3804       220      155       65   29.5%   Bell Solutions
AS4740       403      342       61   15.1%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS10928      101       46       55   54.5%   UNKNOWN
AS3403       181      127       54   29.8%   TIAC
AS549        204      153       51   25.0%   ONet Backbone
AS8517       122       72       50   41.0%   ULAKNET-ASN
AS6335        68       19       49   72.1%   NTRNET
AS72          85       37       48   56.5%   Schlumberger Information Network
AS719        459      412       47   10.2%   LANLINK autonomous system
AS1239       532      485       47    8.8%   SprintLink Backbone
AS4539        70       27       43   61.4%   NETROPOLIS
AS1785       298      255       43   14.4%   NYSERNet Backbone
AS852        156      116       40   25.6%   AGT Advance Communication
AS6181        66       26       40   60.6%   FUSE-NET
AS10921       57       19       38   66.7%   KIHNETWORK
AS762        117       80       37   31.6%   WELLFLEET-AS
AS10459       47       10       37   78.7%   WANSASN


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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