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The Cidr Report

  • From: Tony Bates
  • Date: Fri Apr 10 15:22:34 1998

This is an auto-generated mail on Fri Apr 10 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      A summary of the last weeks changes in terms of withdrawn and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 10Apr98


0) General Status

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

Date	Prefixes
030498	50479
040498	50660
050498	50519
060498	50595
070498	50748
080498	50724
090498	50529
100498	50729

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:                 3448

Number of ASes announcing only one prefix:        1614 (846 cidr, 768 classful)

Largest number of  cidr routes:                    412 announced by AS3561
Largest number of classful routes:                1036 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 10Apr98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       437      213      224   51.3%   IMCI
AS2493       553      338      215   38.9%   iSTAR Internet, Inc.
AS816        672      461      211   31.4%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       467      302      165   35.3%   Sprint Canada Inc.
AS174        774      617      157   20.3%   Performance Systems International
AS701       1036      881      155   15.0%   Alternet
AS3749       218       63      155   71.1%   TECNET
AS8505       154       34      120   77.9%   Middle East Technical University 
AS2939       186       77      109   58.6%   SCAROLINA-AS
AS2048       162       90       72   44.4%   LaNet
AS11003      126       56       70   55.6%   UNKNOWN
AS5668       116       47       69   59.5%   Century Telephone Inc.
AS3221       107       39       68   63.6%   EENet Autonomous System
AS271        112       53       59   52.7%   BCnet Backbone
AS3804       199      141       58   29.1%   Bell Solutions
AS10928       99       41       58   58.6%   UNKNOWN
AS549        209      159       50   23.9%   ONet Backbone
AS1239       538      488       50    9.3%   SprintLink Backbone
AS1221       272      223       49   18.0%   AARNET-AS
AS72          84       36       48   57.1%   Schlumberger Information Network
AS4755        85       37       48   56.5%   Videsh Sanchar Nigam Ltd. India
AS6392        79       32       47   59.5%   MidWest Communications, Inc.
AS7046       154      108       46   29.9%   UUNET-CUSTOMER
AS4763       122       76       46   37.7%   Telstra New Zealand
AS1982       161      118       43   26.7%   Northwest Nexus, Inc.
AS4740       351      309       42   12.0%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS852        157      117       40   25.5%   AGT Advance Communication
AS684         92       52       40   43.5%   Manitoba Regional Network Backbon
AS4200       134       95       39   29.1%   AGIS (Apex Global Information Ser
AS3493       164      126       38   23.2%   INTERLINK


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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