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The Cidr Report

  • From: Tony Bates
  • Date: Fri Mar 26 15:03:57 1999


This is an auto-generated mail on Fri Mar 26 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      A summary of the last weeks changes in terms of withdrawn and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 26Mar99


0) General Status

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

Date	Prefixes
190399	57539
200399	57531
210399	57555
220399	57592
230399	57780
240399	57729
250399	57967
260399	58170

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


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

*** Bogus 123.217.230.0/24 from AS174

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

Number of ASes in routing system:                 4735

Number of ASes announcing only one prefix:        2356 (1262 cidr, 1094 classful)

Largest number of  cidr routes:                    389 announced by  AS701
Largest number of classful routes:                 834 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 26Mar99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        355      144      211   59.4%   BCnet Backbone
AS11305      184       10      174   94.6%   UNKNOWN
AS174        641      525      116   18.1%   Performance Systems International
AS2493       253      144      109   43.1%   iSTAR Internet, Inc.
AS226        205       98      107   52.2%   USC/Information Sciences Institut
AS4755       163       77       86   52.8%   Videsh Sanchar Nigam Ltd. India
AS3749       140       63       77   55.0%   TECNET
AS1740       332      255       77   23.2%   CERFnet
AS4293       214      141       73   34.1%   IMCI
AS1267        94       24       70   74.5%   IUNET-AS
AS4200       166       98       68   41.0%   AGIS (Apex Global Information Ser
AS7545       109       45       64   58.7%   TPG Internet Pty Ltd
AS7046       272      208       64   23.5%   UUNET-CUSTOMER
AS4740       394      330       64   16.2%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1239       530      468       62   11.7%   SprintLink Backbone
AS1221       428      366       62   14.5%   AARNET-AS
AS7496        94       33       61   64.9%   Power Up
AS10928      108       50       58   53.7%   UNKNOWN
AS72          91       39       52   57.1%   Schlumberger Information Network
AS577        223      172       51   22.9%   Bell Canada Backbone
AS3493       232      181       51   22.0%   INTERLINK
AS7657       164      114       50   30.5%   The Internet Group Limited
AS719        461      412       49   10.6%   LANLINK autonomous system
AS5674        80       36       44   55.0%   PBI-NET-BLK
AS852        175      136       39   22.3%   AGT Advance Communication
AS803         72       36       36   50.0%   SaskNet Backbone
AS1          509      473       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


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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