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The Cidr Report

  • From: Tony Bates
  • Date: Fri Mar 27 15:26:09 1998

This is an auto-generated mail on Fri Mar 27 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      A summary of the last weeks changes in terms of withdrawn and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 27Mar98


0) General Status

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

Date	Prefixes
200398	49893
210398	50064
220398	50031
230398	49930
240398	49998
250398	50244
260398	49981
270398	50071

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:                 3371

Number of ASes announcing only one prefix:        1596 (826 cidr, 770 classful)

Largest number of  cidr routes:                    418 announced by AS3561
Largest number of classful routes:                1039 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 27Mar98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       437      213      224   51.3%   IMCI
AS2493       560      343      217   38.8%   iSTAR Internet, Inc.
AS816        653      448      205   31.4%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       465      300      165   35.5%   Sprint Canada Inc.
AS174        786      627      159   20.2%   Performance Systems International
AS3749       219       64      155   70.8%   TECNET
AS701       1039      885      154   14.8%   Alternet
AS11003      128       56       72   56.2%   UNKNOWN
AS5668       113       42       71   62.8%   Century Telephone Inc.
AS2048       160       92       68   42.5%   LaNet
AS3221       102       37       65   63.7%   EENet Autonomous System
AS3804       205      142       63   30.7%   Bell Solutions
AS1239       550      493       57   10.4%   SprintLink Backbone
AS271        110       54       56   50.9%   BCnet Backbone
AS10928       98       43       55   56.1%   UNKNOWN
AS549        211      160       51   24.2%   ONet Backbone
AS4755        84       34       50   59.5%   Videsh Sanchar Nigam Ltd. India
AS1221       272      223       49   18.0%   AARNET-AS
AS72          84       36       48   57.1%   Schlumberger Information Network
AS4763       122       76       46   37.7%   Telstra New Zealand
AS7046       146      102       44   30.1%   UUNET-CUSTOMER
AS6392        73       29       44   60.3%   MidWest Communications, Inc.
AS4740       355      313       42   11.8%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS2711        98       56       42   42.9%   SUNBELT-AS
AS852        157      117       40   25.5%   AGT Advance Communication
AS6335        63       23       40   63.5%   NTRNET
AS3493       162      124       38   23.5%   INTERLINK
AS684         90       53       37   41.1%   Manitoba Regional Network Backbon
AS6332        83       46       37   44.6%   TELNOR
AS4200       127       90       37   29.1%   AGIS (Apex Global Information Ser


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