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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jun 05 15:17:57 1998

This is an auto-generated mail on Fri Jun  5 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      A summary of the last weeks changes in terms of withdrawn and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 05Jun98


0) General Status

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

Date	Prefixes
290598	50967
300598	51064
310598	50995
010698	50998
020698	51248
030698	51503
040698	51477
050698	50625

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:        1747 (923 cidr, 824 classful)

Largest number of  cidr routes:                    360 announced by AS3561
Largest number of classful routes:                1108 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 05Jun98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       466      240      226   48.5%   IMCI
AS2493       503      293      210   41.7%   iSTAR Internet, Inc.
AS174        810      622      188   23.2%   Performance Systems International
AS3602       499      315      184   36.9%   Sprint Canada Inc.
AS701       1108      929      179   16.2%   Alternet
AS3749       220       65      155   70.5%   TECNET
AS3221       112       42       70   62.5%   EENet Autonomous System
AS5668       115       47       68   59.1%   Century Telephone Inc.
AS4755        97       30       67   69.1%   Videsh Sanchar Nigam Ltd. India
AS3248       128       61       67   52.3%   VIAnet
AS10928      108       44       64   59.3%   UNKNOWN
AS7046       203      141       62   30.5%   UUNET-CUSTOMER
AS6269       125       66       59   47.2%   AT&T NWCS backbone network
AS3804       199      141       58   29.1%   Bell Solutions
AS271        110       52       58   52.7%   BCnet Backbone
AS549        206      153       53   25.7%   ONet Backbone
AS4740       374      324       50   13.4%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS4539        74       24       50   67.6%   NETROPOLIS
AS1221       274      224       50   18.2%   AARNET-AS
AS72          85       37       48   56.5%   Schlumberger Information Network
AS6335        68       20       48   70.6%   NTRNET
AS1239       541      494       47    8.7%   SprintLink Backbone
AS4200       144       99       45   31.2%   AGIS (Apex Global Information Ser
AS852        159      118       41   25.8%   AGT Advance Communication
AS719        443      404       39    8.8%   LANLINK autonomous system
AS7657       120       82       38   31.7%   The Internet Group Limited
AS762        117       80       37   31.6%   WELLFLEET-AS
AS6181        65       28       37   56.9%   FUSE-NET
AS803         72       36       36   50.0%   SaskNet Backbone
AS4763       108       72       36   33.3%   Telstra New Zealand


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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