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The Cidr Report

  • From: Tony Bates
  • Date: Fri Nov 26 15:01:53 1999

This is an auto-generated mail on Fri Nov 26 12:00:02 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      A summary of the last weeks changes in terms of withdrawn and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 26Nov99


0) General Status

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

Date	Prefixes
071199	66095
081199	66195
091199	66908
101199	65842
111199	67577
241199	67406
251199	67521
261199	67449

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


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

*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 6114

Number of ASes announcing only one prefix:        3245 (1783 cidr, 1462 classful)

Largest number of  cidr routes:                    640 announced by  AS701
Largest number of classful routes:                 979 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 26Nov99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      141      242   63.2%   BCnet Backbone
AS7046       386      257      129   33.4%   UUNET-CUSTOMER
AS1221       626      514      112   17.9%   TELSTRA-AS
AS2609       125       15      110   88.0%   EUnet-TN
AS9706       112       11      101   90.2%   Pusan Metropolitan City Office of
AS9269       126       27       99   78.6%   Hong Kong CTI
AS7657       264      168       96   36.4%   The Internet Group Limited
AS7545       146       60       86   58.9%   TPG Internet Pty Ltd
AS174        562      476       86   15.3%   Performance Systems International
AS7496       123       38       85   69.1%   Power Up
AS4293       226      142       84   37.2%   Internal ASN for C&W
AS577        265      185       80   30.2%   Bell Canada Backbone
AS3749       134       61       73   54.5%   TECNET
AS4200       181      111       70   38.7%   AGIS (Apex Global Information Ser
AS3602       309      245       64   20.7%   Sprint Canada Inc.
AS705        134       75       59   44.0%   ALTERNET-AS
AS4740       351      293       58   16.5%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS816        251      194       57   22.7%   UUNET Canada (ASN-UUNETCA-AS4)
AS209        330      276       54   16.4%   Qwest Communications
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS701        979      936       43    4.4%   Alternet
AS1          522      480       42    8.0%   GTE Internetworking
AS549        213      172       41   19.2%   ONet Backbone
AS9304        56       16       40   71.4%   Hutchcity
AS6528        45        7       38   84.4%   WORLD-LYNX
AS2493       122       84       38   31.1%   iSTAR Internet, Inc.
AS4755       108       71       37   34.3%   Videsh Sanchar Nigam Ltd. India
AS6629        63       28       35   55.6%   NOAA-AS
AS1727        97       63       34   35.1%   MRMS-WEST
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