The Cidr Report

Tony Bates tbates at cisco.com
Fri Apr 2 20:00:03 UTC 1999


This is an auto-generated mail on Fri Apr  2 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 02Apr99


0) General Status

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

Date	Prefixes
260399	58170
270399	57903
280399	57861
290399	58117
300399	58152
310399	65565
010499	58158
020499	57822

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.


Possible Bogus Routes
---------------------

*** Bogus 71.0.2.0/24 from AS1239

AS Summary
----------

Number of ASes in routing system:                 4764

Number of ASes announcing only one prefix:        2369 (1259 cidr, 1110 classful)

Largest number of  cidr routes:                    383 announced by  AS701
Largest number of classful routes:                 829 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 02Apr99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        336      136      200   59.5%   BCnet Backbone
AS174        637      523      114   17.9%   Performance Systems International
AS226        206       99      107   51.9%   USC/Information Sciences Institut
AS2493       239      140       99   41.4%   iSTAR Internet, Inc.
AS4755       159       73       86   54.1%   Videsh Sanchar Nigam Ltd. India
AS3749       140       63       77   55.0%   TECNET
AS4293       214      142       72   33.6%   IMCI
AS1267        94       24       70   74.5%   IUNET-AS
AS4200       165       97       68   41.2%   AGIS (Apex Global Information Ser
AS7545       110       46       64   58.2%   TPG Internet Pty Ltd
AS7496        94       30       64   68.1%   Power Up
AS7046       268      205       63   23.5%   UUNET-CUSTOMER
AS1221       446      383       63   14.1%   AARNET-AS
AS4740       335      276       59   17.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1239       521      463       58   11.1%   SprintLink Backbone
AS7657       173      118       55   31.8%   The Internet Group Limited
AS10928      108       53       55   50.9%   UNKNOWN
AS72          92       40       52   56.5%   Schlumberger Information Network
AS3493       234      183       51   21.8%   INTERLINK
AS719        461      412       49   10.6%   LANLINK autonomous system
AS577        222      173       49   22.1%   Bell Canada Backbone
AS5674        80       36       44   55.0%   PBI-NET-BLK
AS803         72       36       36   50.0%   SaskNet Backbone
AS1          510      474       36    7.1%   BBNPLANET
AS7745        39        4       35   89.7%   BIGSKY-AS
AS7122       111       78       33   29.7%   MTS ADVANCED Network Policy
AS262         36        3       33   91.7%   JVNC-II-AS
AS1785       248      216       32   12.9%   NYSERNet Backbone
AS6172       151      120       31   20.5%   HOME-NET-1
AS4307        32        1       31   96.9%   SVINET-1


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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