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The Cidr Report

  • From: Tony Bates
  • Date: Fri Mar 19 15:02:59 1999


This is an auto-generated mail on Fri Mar 19 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      A summary of the last weeks changes in terms of withdrawn and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 19Mar99


0) General Status

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

Date	Prefixes
120399	56938
130399	57039
140399	56857
150399	56894
160399	57203
170399	57348
180399	57351
190399	57539

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:                 4691

Number of ASes announcing only one prefix:        2322 (1249 cidr, 1073 classful)

Largest number of  cidr routes:                    383 announced by  AS701
Largest number of classful routes:                 851 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 19Mar99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        356      145      211   59.3%   BCnet Backbone
AS2493       265      148      117   44.2%   iSTAR Internet, Inc.
AS174        641      528      113   17.6%   Performance Systems International
AS11305      116        8      108   93.1%   UNKNOWN
AS226        204       99      105   51.5%   USC/Information Sciences Institut
AS4755       159       82       77   48.4%   Videsh Sanchar Nigam Ltd. India
AS3749       138       62       76   55.1%   TECNET
AS4293       209      138       71   34.0%   IMCI
AS1267        94       24       70   74.5%   IUNET-AS
AS4200       165       97       68   41.2%   AGIS (Apex Global Information Ser
AS7046       273      208       65   23.8%   UUNET-CUSTOMER
AS7545       110       46       64   58.2%   TPG Internet Pty Ltd
AS7496        96       34       62   64.6%   Power Up
AS1221       430      368       62   14.4%   AARNET-AS
AS1239       523      466       57   10.9%   SprintLink Backbone
AS4740       364      311       53   14.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7657       159      107       52   32.7%   The Internet Group Limited
AS72          91       39       52   57.1%   Schlumberger Information Network
AS3493       229      178       51   22.3%   INTERLINK
AS577        223      173       50   22.4%   Bell Canada Backbone
AS10928      100       51       49   49.0%   UNKNOWN
AS719        457      409       48   10.5%   LANLINK autonomous system
AS5674        80       36       44   55.0%   PBI-NET-BLK
AS852        174      135       39   22.4%   AGT Advance Communication
AS803         73       37       36   49.3%   SaskNet Backbone
AS7745        39        4       35   89.7%   BIGSKY-AS
AS7122       111       78       33   29.7%   MTS ADVANCED Network Policy
AS6332        92       59       33   35.9%   TELNOR
AS1          506      473       33    6.5%   BBNPLANET
AS1785       248      216       32   12.9%   NYSERNet Backbone


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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