The Cidr Report

Tony Bates tbates at cisco.com
Fri May 7 19:00:04 UTC 1999


This is an auto-generated mail on Fri May  7 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      A summary of the last weeks changes in terms of withdrawn and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 07May99


0) General Status

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

Date	Prefixes
300499	58568
010599	58452
020599	58475
030599	58545
040599	58645
050599	58720
060599	58883
070599	58948

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
*** Bogus 221.43.160.0/19 from AS12323

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

Number of ASes in routing system:                 4916

Number of ASes announcing only one prefix:        2500 (1358 cidr, 1142 classful)

Largest number of  cidr routes:                    377 announced by  AS701
Largest number of classful routes:                 799 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07May99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        360      148      212   58.9%   BCnet Backbone
AS577        299      186      113   37.8%   Bell Canada Backbone
AS4293       289      182      107   37.0%   IMCI
AS174        598      497      101   16.9%   Performance Systems International
AS4755       176       85       91   51.7%   Videsh Sanchar Nigam Ltd. India
AS2493       211      126       85   40.3%   iSTAR Internet, Inc.
AS4200       177      101       76   42.9%   AGIS (Apex Global Information Ser
AS3749       136       63       73   53.7%   TECNET
AS1267        94       24       70   74.5%   IUNET-AS
AS7496        99       30       69   69.7%   Power Up
AS7545       111       47       64   57.7%   TPG Internet Pty Ltd
AS7046       270      206       64   23.7%   UUNET-CUSTOMER
AS1239       548      484       64   11.7%   SprintLink Backbone
AS1785       384      321       63   16.4%   NYSERNet Backbone
AS9269        69        8       61   88.4%   Hong Kong CTI
AS7122       140       81       59   42.1%   MTS ADVANCED Network Policy
AS1221       454      395       59   13.0%   TELSTRA-AS
AS4513        97       40       57   58.8%   PFM Communications, Inc.
AS10928      111       54       57   51.4%   UNKNOWN
AS719        475      421       54   11.4%   LANLINK autonomous system
AS4740       334      280       54   16.2%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7657       163      111       52   31.9%   The Internet Group Limited
AS72          93       41       52   55.9%   Schlumberger Information Network
AS803         78       34       44   56.4%   SaskNet Backbone
AS5674        80       36       44   55.0%   PBI-NET-BLK
AS3737       111       73       38   34.2%   PenTeleData Inc. (ASN-PTD)
AS1          499      465       34    6.8%   BBNPLANET
AS6172       154      123       31   20.1%   HOME-NET-1
AS4307        32        1       31   96.9%   SVINET-1
AS2907       210      179       31   14.8%   SINET


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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