The Cidr Report

[Tony Bates <tbates () cisco com>]

This is an auto-generated mail on Fri Oct  6 12:00:00 PDT 2000
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      A summary of the last weeks changes in terms of withdrawn and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 06Oct00


0) General Status

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

Date    Prefixes
290900  88909
300900  88195
011000  88325
021000  88317
031000  88456
041000  88428
051000  88525
061000  88980

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:                 8668

Number of ASes announcing only one prefix:        4969 (2769 cidr, 2200 classful)

Largest number of  cidr routes:                    907 announced by  AS701
Largest number of classful routes:                1086 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 06Oct00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        431      153      278   64.5%   BCnet Backbone
AS1785       592      379      213   36.0%   AppliedTheory Communications
AS1221       621      454      167   26.9%   TELSTRA-AS
AS816        579      434      145   25.0%   UUNET Canada (ASN-UUNETCA-AS4)
AS9269       177       47      130   73.4%   Hong Kong CTI
AS7046       405      283      122   30.1%   COQUI-NET PRTC Internet
AS2609       128        8      120   93.8%   EUnet-TN
AS9304       125       15      110   88.0%   Hutchcity
AS4755       224      116      108   48.2%   Videsh Sanchar Nigam Ltd. India
AS7657       324      220      104   32.1%   The Internet Group Limited
AS7545       159       55      104   65.4%   TPG Internet Pty Ltd
AS705        363      263      100   27.5%   ALTERNET-AS
AS9706       103        9       94   91.3%   Pusan Metropolitan City Office of
AS6429       210      116       94   44.8%   FirstCom Internet
AS7496       126       35       91   72.2%   Power Up
AS8013       492      406       86   17.5%   PSINET-CA
AS174        539      453       86   16.0%   Performance Systems International
AS4293       340      257       83   24.4%   Internal ASN for C&W
AS13999       91        9       82   90.1%   UNKNOWN
AS6595       138       57       81   58.7%   DODDSEUR
AS3908       256      177       79   30.9%   Supernet, Inc.
AS577        248      175       73   29.4%   Bell Backbone
AS8895       107       37       70   65.4%   Saudi Arabia AS
AS724        223      156       67   30.0%   DLA-ASNBLOCK-AS
AS7018       579      512       67   11.6%   AT&T WorldNet Service Backbone
AS701       1086     1021       65    6.0%   Alternet
AS5106        99       36       63   63.6%   AADS-COLUMBUS
AS1727       139       76       63   45.3%   MRMS-WEST
AS3749       119       57       62   52.1%   TECNET
AS226        170      108       62   36.5%   USC/Information Sciences Institut


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