The Cidr Report

Tony Bates tbates at cisco.com
Fri Aug 6 19:00:02 UTC 1999


This is an auto-generated mail on Fri Aug  6 12:00:00 PDT 1999
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      A summary of the last weeks changes in terms of withdrawn and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 06Aug99


0) General Status

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

Date	Prefixes
300799	61912
310799	61846
010899	61817
020899	62029
030899	62101
040899	61977
050899	61856
060899	61906

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:                 5397

Number of ASes announcing only one prefix:        2825 (1559 cidr, 1266 classful)

Largest number of  cidr routes:                    478 announced by  AS701
Largest number of classful routes:                 839 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 06Aug99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        346      150      196   56.6%   BCnet Backbone
AS2609       124       20      104   83.9%   EUnet-TN
AS1221       547      450       97   17.7%   TELSTRA-AS
AS577        283      191       92   32.5%   Bell Canada Backbone
AS174        574      482       92   16.0%   Performance Systems International
AS3749       153       63       90   58.8%   TECNET
AS7046       327      240       87   26.6%   UUNET-CUSTOMER
AS4293       237      151       86   36.3%   IMCI
AS4200       178      101       77   43.3%   AGIS (Apex Global Information Ser
AS7545       141       66       75   53.2%   TPG Internet Pty Ltd
AS7657       230      156       74   32.2%   The Internet Group Limited
AS7496       107       34       73   68.2%   Power Up
AS10928      117       48       69   59.0%   UNKNOWN
AS9269        77       15       62   80.5%   Hong Kong CTI
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4755       133       77       56   42.1%   Videsh Sanchar Nigam Ltd. India
AS719        457      406       51   11.2%   LANLINK autonomous system
AS2493       157      108       49   31.2%   iSTAR Internet, Inc.
AS684         91       46       45   49.5%   Manitoba Regional Network Backbon
AS549        215      172       43   20.0%   ONet Backbone
AS3737       108       67       41   38.0%   PenTeleData Inc. (ASN-PTD)
AS209        263      226       37   14.1%   Qwest Communications
AS1785       253      216       37   14.6%   NYSERNet Backbone
AS1          503      468       35    7.0%   BBNPLANET
AS10724       43        9       34   79.1%   UNKNOWN
AS6762        33        2       31   93.9%   Telecom Italia international high
AS4307        32        1       31   96.9%   SVINET-1
AS8023        43       13       30   69.8%   CASTLES
AS7745        38        8       30   78.9%   BIGSKY-AS
AS6629        61       31       30   49.2%   NOAA-AS


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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