The Cidr Report

Tony Bates tbates at cisco.com
Fri Nov 19 20:00:02 UTC 1999


This is an auto-generated mail on Fri Nov 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      A summary of the last weeks changes in terms of withdrawn and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 19Nov99


0) General Status

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

Date	Prefixes
041199	66135
051199	66177
061199	66189
071199	66095
081199	66195
091199	66908
101199	65842
111199	67577

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:                 4241

Number of ASes announcing only one prefix:        1433 (0 cidr, 1433 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                1720 announced by AS1890



1) Gains by aggregating at the origin AS level

 --- 19Nov99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1890      1720      797      923   53.7%   UUNET NL Autonomous System
AS271        383      141      242   63.2%   BCnet Backbone
AS7046       389      258      131   33.7%   UUNET-CUSTOMER
AS2609       126       11      115   91.3%   EUnet-TN
AS1221       614      506      108   17.6%   TELSTRA-AS
AS9269       123       30       93   75.6%   Hong Kong CTI
AS7657       253      162       91   36.0%   The Internet Group Limited
AS7545       146       60       86   58.9%   TPG Internet Pty Ltd
AS7496       123       38       85   69.1%   Power Up
AS174        555      471       84   15.1%   Performance Systems International
AS4293       220      138       82   37.3%   Internal ASN for C&W
AS577        263      182       81   30.8%   Bell Canada Backbone
AS3749       138       63       75   54.3%   TECNET
AS4200       181      111       70   38.7%   AGIS (Apex Global Information Ser
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4740       347      292       55   15.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS816        239      190       49   20.5%   UUNET Canada (ASN-UUNETCA-AS4)
AS209        304      257       47   15.5%   Qwest Communications
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS9304        55       16       39   70.9%   Hutchcity
AS4755       107       68       39   36.4%   Videsh Sanchar Nigam Ltd. India
AS6528        45        7       38   84.4%   WORLD-LYNX
AS549        206      168       38   18.4%   ONet Backbone
AS2493       125       87       38   30.4%   iSTAR Internet, Inc.
AS719        195      159       36   18.5%   LANLINK autonomous system
AS701        962      926       36    3.7%   Alternet
AS6629        63       28       35   55.6%   NOAA-AS
AS1          503      468       35    7.0%   GTE Internetworking
AS7568        48       14       34   70.8%   C.S. Communications Co., Ltd.
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)


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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