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The Cidr Report

  • From: Tony Bates
  • Date: Fri Aug 18 15:07:56 2000

This is an auto-generated mail on Fri Aug 18 12:00:00 PDT 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      A summary of the last weeks changes in terms of withdrawn and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 18Aug00


0) General Status

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

Date	Prefixes
110800	83938
120800	83973
130800	83844
140800	84055
150800	84170
160800	84296
170800	84509
180800	85012

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:                 6201

Number of ASes announcing only one prefix:        3042 (999 cidr, 2043 classful)

Largest number of  cidr routes:                    553 announced by  AS705
Largest number of classful routes:                1076 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 18Aug00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        434      156      278   64.1%   BCnet Backbone
AS1221       596      437      159   26.7%   TELSTRA-AS
AS7046       435      295      140   32.2%   COQUI-NET PRTC Internet
AS9706       155       26      129   83.2%   Pusan Metropolitan City Office of
AS2609       126       15      111   88.1%   EUnet-TN
AS7657       303      195      108   35.6%   The Internet Group Limited
AS1785       472      364      108   22.9%   AppliedTheory Communications
AS9304       121       15      106   87.6%   Hutchcity
AS9269       160       57      103   64.4%   Hong Kong CTI
AS7545       156       57       99   63.5%   TPG Internet Pty Ltd
AS6429       209      118       91   43.5%   FirstCom Internet
AS7496       126       38       88   69.8%   Power Up
AS577        260      174       86   33.1%   Bell Backbone
AS174        552      466       86   15.6%   Performance Systems International
AS4293       331      246       85   25.7%   Internal ASN for C&W
AS1727       185      106       79   42.7%   MRMS-WEST
AS3908       260      182       78   30.0%   Supernet, Inc.
AS705        322      247       75   23.3%   ALTERNET-AS
AS724        225      154       71   31.6%   DLA-ASNBLOCK-AS
AS816        341      272       69   20.2%   UUNET Canada (ASN-UUNETCA-AS4)
AS6595       122       54       68   55.7%   DODDSEUR
AS4755       175      110       65   37.1%   Videsh Sanchar Nigam Ltd. India
AS5106        98       36       62   63.3%   AADS-COLUMBUS
AS3749       122       60       62   50.8%   TECNET
AS7018       555      496       59   10.6%   AT&T WorldNet Service Backbone
AS701       1076     1018       58    5.4%   Alternet
AS3602       296      240       56   18.9%   Sprint Canada Inc.
AS11252       90       37       53   58.9%   Idaho State University
AS4740       318      266       52   16.4%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS16758       62       10       52   83.9%   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