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The Cidr Report

  • From: Tony Bates
  • Date: Fri Feb 26 15:01:36 1999

This is an auto-generated mail on Fri Feb 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      A summary of the last weeks changes in terms of withdrawn and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 26Feb99


0) General Status

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

Date	Prefixes
190299	56528
200299	56373
210299	56116
220299	56354
230299	56456
240299	56506
250299	56299
260299	56598

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:                 4611

Number of ASes announcing only one prefix:        2304 (1234 cidr, 1070 classful)

Largest number of  cidr routes:                    357 announced by  AS701
Largest number of classful routes:                 867 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 26Feb99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        355      144      211   59.4%   BCnet Backbone
AS2493       270      153      117   43.3%   iSTAR Internet, Inc.
AS174        641      529      112   17.5%   Performance Systems International
AS11305      116        8      108   93.1%   UNKNOWN
AS4755       158       78       80   50.6%   Videsh Sanchar Nigam Ltd. India
AS1267       107       29       78   72.9%   IUNET-AS
AS3749       140       63       77   55.0%   TECNET
AS4293       218      144       74   33.9%   IMCI
AS7545       112       48       64   57.1%   TPG Internet Pty Ltd
AS4200       165      101       64   38.8%   AGIS (Apex Global Information Ser
AS1221       423      360       63   14.9%   AARNET-AS
AS4740       385      324       61   15.8%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7046       258      200       58   22.5%   UUNET-CUSTOMER
AS1239       529      471       58   11.0%   SprintLink Backbone
AS72          89       37       52   58.4%   Schlumberger Information Network
AS10928      102       50       52   51.0%   UNKNOWN
AS577        222      172       50   22.5%   Bell Canada Backbone
AS7657       142       93       49   34.5%   The Internet Group Limited
AS7496        78       29       49   62.8%   Power Up
AS719        460      414       46   10.0%   LANLINK autonomous system
AS803         78       34       44   56.4%   SaskNet Backbone
AS852        177      137       40   22.6%   AGT Advance Communication
AS701        867      828       39    4.5%   Alternet
AS5674        64       27       37   57.8%   PBI-NET-BLK
AS7745        39        4       35   89.7%   BIGSKY-AS
AS7122       112       77       35   31.2%   MTS ADVANCED Network Policy
AS1785       249      217       32   12.9%   NYSERNet Backbone
AS1          505      473       32    6.3%   BBNPLANET
AS6332        94       63       31   33.0%   TELNOR
AS549        163      132       31   19.0%   ONet 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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