The Cidr Report

Tony Bates tbates at cisco.com
Sat Feb 17 07:00:02 UTC 2001



This is an auto-generated mail on Fri Feb 16 23:00:00 PST 2001
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      A summary of the last weeks changes in terms of withdrawn and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 16Feb01


0) General Status

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

Date	Prefixes
050201	96681
060201	96726
070201	96978
080201	97041
090201	97137
100201	96880
110201	96509
120201	96907

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:                 6307

Number of ASes announcing only one prefix:        2489 (0 cidr, 2489 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                1648 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 16Feb01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1623     1207      416   25.6%   Telstra Pty Ltd
AS701       1648     1453      195   11.8%   UUNET Technologies, Inc. 
AS271        283      130      153   54.1%   University of British Columbia 
AS8006       146       13      133   91.1%   Systems & Software Consortium, In
AS7545       196       71      125   63.8%   ASNBLK-APNIC-AS-2-BLOCK
AS9269       168       46      122   72.6%   ASNBLK-APNIC-AS-3-BLOCK
AS6429       218      110      108   49.5%   RdC Internet 
AS6595       163       62      101   62.0%   DoD Education Activity Network As
AS8013       435      338       97   22.3%   PSINet Ltd. Canada 
AS13999      107       10       97   90.7%   Mega Cable S.A. de C.V. 
AS4293       375      282       93   24.8%   Cable & Wireless USA 
AS7496       104       23       81   77.9%   ASNBLK-APNIC-AS-2-BLOCK
AS4151       251      170       81   32.3%   USDA 
AS705        314      235       79   25.2%   UUNET Technologies, Inc. 
AS4755       206      134       72   35.0%   ASN-APNIC-AS-BLOCK-ASNBLOCK
AS1942       137       65       72   52.6%   FR-CICG-GRENOBLE
AS7046       325      255       70   21.5%   UUNET Technologies, Inc. 
AS7018       611      541       70   11.5%   AT&T 
AS577        236      167       69   29.2%   Bell Advanced Communications Inc.
AS174        500      432       68   13.6%   PSINet Inc. 
AS1727       161       93       68   42.2%   Commander Naval Surface force US 
AS9498        88       21       67   76.1%   BHARTI BT INTERNET LTD.
AS724        219      152       67   30.6%   DLA Systems Automation Center 
AS5106       101       37       64   63.4%   Ameritech Advanced Data Services,
AS3464       153       92       61   39.9%   Alabama SuperComputer Network 
AS226        155       95       60   38.7%   Los Nettos 
AS7657       184      126       58   31.5%   ASNBLK-APNIC-AS-2-BLOCK
AS3749       115       57       58   50.4%   Tennessee Board of Regents 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS6413        67       11       56   83.6%   Southern Online Systems, Inc. 


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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