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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 27 15:06:46 2000


This is an auto-generated mail on Fri Oct 27 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      A summary of the last weeks changes in terms of withdrawn and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 27Oct00


0) General Status

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

Date	Prefixes
201000	89411
211000	89037
221000	89088
231000	89255
241000	89314
251000	89441
261000	89651
271000	89717

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:                 8876

Number of ASes announcing only one prefix:        5070 (2831 cidr, 2239 classful)

Largest number of  cidr routes:                    923 announced by  AS701
Largest number of classful routes:                1138 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 27Oct00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        421      148      273   64.8%   BCnet Backbone
AS1221       590      439      151   25.6%   TELSTRA-AS
AS9269       180       47      133   73.9%   Hong Kong CTI
AS816        549      421      128   23.3%   UUNET Canada (ASN-UUNETCA-AS4)
AS2609       128        8      120   93.8%   EUnet-TN
AS6429       226      112      114   50.4%   FirstCom Internet
AS9304       130       17      113   86.9%   Hutchcity
AS8013       464      360      104   22.4%   PSINET-CA
AS7545       159       55      104   65.4%   TPG Internet Pty Ltd
AS4755       200      102       98   49.0%   Videsh Sanchar Nigam Ltd. India
AS705        356      259       97   27.2%   ALTERNET-AS
AS7657       312      217       95   30.4%   The Internet Group Limited
AS7046       347      255       92   26.5%   UUNET-CUSTOMER
AS7496       128       37       91   71.1%   Power Up
AS174        542      456       86   15.9%   Performance Systems International
AS701       1138     1055       83    7.3%   Alternet
AS4293       340      258       82   24.1%   Internal ASN for C&W
AS13999       91        9       82   90.1%   UNKNOWN
AS6595       138       57       81   58.7%   DODDSEUR
AS3908       251      172       79   31.5%   Supernet, Inc.
AS577        247      176       71   28.7%   Bell Backbone
AS724        218      151       67   30.7%   DLA-ASNBLOCK-AS
AS7018       582      516       66   11.3%   AT&T WorldNet Service Backbone
AS5106       100       37       63   63.0%   AADS-COLUMBUS
AS226        169      107       62   36.7%   USC/Information Sciences Institut
AS3749       118       57       61   51.7%   TECNET
AS1727       149       88       61   40.9%   MRMS-WEST
AS16758       63        6       57   90.5%   UNKNOWN
AS376        131       75       56   42.7%   RISQ
AS8151       180      126       54   30.0%   UNINET-MX


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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