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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jan 21 16:31:40 2000


This is an auto-generated mail on Fri Jan 21 12:00:02 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      A summary of the last weeks changes in terms of withdrawn and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 21Jan00


0) General Status

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

Date	Prefixes
140100	69862
150100	70956
160100	70982
170100	71135
180100	70228
190100	70246
200100	70143
210100	70096

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:                 6488

Number of ASes announcing only one prefix:        3493 (1893 cidr, 1600 classful)

Largest number of  cidr routes:                    707 announced by  AS701
Largest number of classful routes:                 984 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 21Jan00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        384      142      242   63.0%   BCnet Backbone
AS7046       410      267      143   34.9%   UUNET-CUSTOMER
AS9269       135       25      110   81.5%   Hong Kong CTI
AS2609       125       16      109   87.2%   EUnet-TN
AS1221       623      516      107   17.2%   TELSTRA-AS
AS7657       285      185      100   35.1%   The Internet Group Limited
AS7545       153       60       93   60.8%   TPG Internet Pty Ltd
AS6429       206      114       92   44.7%   RDC-INTERNET
AS4293       256      164       92   35.9%   Internal ASN for C&W
AS2715       156       65       91   58.3%   REDERIO-AS
AS174        563      479       84   14.9%   Performance Systems International
AS7496       119       39       80   67.2%   Power Up
AS705        270      193       77   28.5%   ALTERNET-AS
AS577        253      177       76   30.0%   Bell Nexxia Backbone
AS3749       135       61       74   54.8%   TECNET
AS9304        94       23       71   75.5%   Hutchcity
AS3602       315      249       66   21.0%   Sprint Canada Inc.
AS4200       170      105       65   38.2%   AGIS (Apex Global Information Ser
AS1727       138       76       62   44.9%   MRMS-WEST
AS816        244      185       59   24.2%   UUNET Canada (ASN-UUNETCA-AS4)
AS4740       343      285       58   16.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7260       103       46       57   55.3%   NORLIGHT
AS209        377      325       52   13.8%   Qwest Communications
AS4151        94       48       46   48.9%   USDA Internet Access Network
AS684         89       44       45   50.6%   Manitoba Regional Network Backbon
AS4755       120       77       43   35.8%   Videsh Sanchar Nigam Ltd. India
AS701        984      942       42    4.3%   Alternet
AS7568        56       16       40   71.4%   C.S. Communications Co., Ltd.
AS3549       154      115       39   25.3%   Frontier GlobalCenter
AS11127      124       85       39   31.5%   UNKNOWN


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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