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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jan 07 15:05:03 2000


This is an auto-generated mail on Fri Jan  7 12:00:00 PST 2000
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      A summary of the last weeks changes in terms of withdrawn and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 07Jan00


0) General Status

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

Date	Prefixes
311299	68794
010100	68060
020100	68601
030100	69117
040100	69405
050100	69342
060100	69294
070100	69327

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:                 5638

Number of ASes announcing only one prefix:        3032 (1493 cidr, 1539 classful)

Largest number of  cidr routes:                    623 announced by  AS701
Largest number of classful routes:                 953 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07Jan00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      141      242   63.2%   BCnet Backbone
AS7046       426      268      158   37.1%   UUNET-CUSTOMER
AS9269       134       21      113   84.3%   Hong Kong CTI
AS1221       643      530      113   17.6%   TELSTRA-AS
AS2609       124       18      106   85.5%   EUnet-TN
AS7657       281      182       99   35.2%   The Internet Group Limited
AS7545       153       60       93   60.8%   TPG Internet Pty Ltd
AS1653       129       38       91   70.5%   SUNET Swedish University Network
AS4293       240      153       87   36.2%   Internal ASN for C&W
AS174        561      476       85   15.2%   Performance Systems International
AS577        258      180       78   30.2%   Bell Nexxia Backbone
AS6429       194      117       77   39.7%   RDC-INTERNET
AS7496       111       36       75   67.6%   Power Up
AS3749       135       61       74   54.8%   TECNET
AS705        241      174       67   27.8%   ALTERNET-AS
AS4200       171      105       66   38.6%   AGIS (Apex Global Information Ser
AS9304        82       21       61   74.4%   Hutchcity
AS816        234      178       56   23.9%   UUNET Canada (ASN-UUNETCA-AS4)
AS4740       330      275       55   16.7%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS209        342      289       53   15.5%   Qwest Communications
AS4151       107       56       51   47.7%   USDA Internet Access Network
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS4755       113       73       40   35.4%   Videsh Sanchar Nigam Ltd. India
AS7568        54       16       38   70.4%   C.S. Communications Co., Ltd.
AS6528        46        8       38   82.6%   WORLD-LYNX
AS1          523      485       38    7.3%   GTE Internetworking
AS7029        78       41       37   47.4%   ALLTELNET
AS701        953      916       37    3.9%   Alternet
AS7390        50       14       36   72.0%   NLSLAN
AS6172       149      113       36   24.2%   HOME-NET-1


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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