The Cidr Report

Tony Bates tbates at cisco.com
Fri Dec 25 20:00:03 UTC 1998


This is an auto-generated mail on Fri Dec 25 12:00:00 PST 1998
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      A summary of the last weeks changes in terms of withdrawn and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 25Dec98


0) General Status

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

Date	Prefixes
181298	54712
191298	54745
201298	54631
211298	54716
221298	54845
231298	54811
241298	54847
251298	54839

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:                 4371

Number of ASes announcing only one prefix:        2158 (1151 cidr, 1007 classful)

Largest number of  cidr routes:                    355 announced by AS3561
Largest number of classful routes:                1003 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 25Dec98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        389      144      245   63.0%   BCnet Backbone
AS2493       325      178      147   45.2%   iSTAR Internet, Inc.
AS3749       222       77      145   65.3%   TECNET
AS701       1003      863      140   14.0%   Alternet
AS1785       541      403      138   25.5%   NYSERNet Backbone
AS174        667      544      123   18.4%   Performance Systems International
AS5668       133       36       97   72.9%   Century Telephone Inc.
AS4200       189       96       93   49.2%   AGIS (Apex Global Information Ser
AS4755       142       62       80   56.3%   Videsh Sanchar Nigam Ltd. India
AS1267       109       30       79   72.5%   IUNET-AS
AS4293       207      135       72   34.8%   IMCI
AS549        221      155       66   29.9%   ONet Backbone
AS4740       383      321       62   16.2%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221       390      332       58   14.9%   AARNET-AS
AS8517       129       72       57   44.2%   UNKNOWN
AS7657       141       86       55   39.0%   The Internet Group Limited
AS7046       245      193       52   21.2%   UUNET-CUSTOMER
AS7545       115       65       50   43.5%   TPG Internet Pty Ltd
AS1239       534      485       49    9.2%   SprintLink Backbone
AS72          88       40       48   54.5%   Schlumberger Information Network
AS7496        73       28       45   61.6%   Power Up
AS577        211      166       45   21.3%   Bell Canada Backbone
AS10928       93       50       43   46.2%   UNKNOWN
AS852        174      132       42   24.1%   AGT Advance Communication
AS3221        84       42       42   50.0%   RIPE-ASNBLOCK4
AS719        444      405       39    8.8%   LANLINK-AS
AS803         71       35       36   50.7%   SaskNet Backbone
AS7122       111       76       35   31.5%   MTS ADVANCED Network Policy
AS2707        65       32       33   50.8%   WEC
AS6897        46       14       32   69.6%   RIPE-ASNBLOCK6


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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