The Cidr Report

CIDR Report cidr-report at cisco.com
Sat Dec 29 07:00:02 UTC 2001


This is an auto-generated mail on Fri Dec 28 23:00:01 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.

Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.

NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for
the regional version of this report.

NEW: Check http://www.employees.org/~tbates/autnums.html for a complete
list of autonomous system number to name mappings as used by the CIDR-Report.

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      A summary of the last weeks changes in terms of withdrawn and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 GX Networks for giving me access to their routing tables once a
day. 

Please send any comments about this report directly to CIDR Report <cidr-report at cisco.com>.



------------------------------------------------------------------------------

                        CIDR REPORT for 28Dec01


0) General Status

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

Date	Prefixes
211201	104932
221201	104791
231201	104801
241201	104769
251201	104805
261201	104705
271201	104655
281201	104604

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:              12178

Number of ASes announcing only one prefix:      7353 (4159 cidr, 3194 classful)

Largest number of  cidr routes:                  768 announced by  AS701
Largest number of classful routes:              1362 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 28Dec01 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1178      908      270   22.9%   Telstra Pty Ltd
AS701       1362     1132      230   16.9%   UUNET Technologies, Inc. 
AS4151       292      158      134   45.9%   USDA 
AS577        319      195      124   38.9%   Bell Advanced Communications Inc.
AS16473      198       77      121   61.1%   Bell South 
AS7018       812      696      116   14.3%   AT&T 
AS705        284      181      103   36.3%   UUNET Technologies, Inc. 
AS852        410      312       98   23.9%   Telus Advanced Communications 
AS6595       147       50       97   66.0%   DoD Education Activity Network As
AS17557      169       82       87   51.5%   Pakistan Telecom
AS7046       308      222       86   27.9%   UUNET Technologies, Inc. 
AS19632       93       10       83   89.2%   Metropolis Intercom S.A. 
AS8010       120       38       82   68.3%   PublicNet Communications, Inc. 
AS4755       216      136       80   37.0%   Videsh Sanchar Nigam Ltd. Autonom
AS1239       486      407       79   16.3%   Sprint 
AS2048       182      106       76   41.8%   State of Louisiana 
AS12302      109       33       76   69.7%   MobiFon S.A.
AS724        231      166       65   28.1%   DLA Systems Automation Center 
AS703        283      221       62   21.9%   UUNET Technologies, Inc. 
AS3464       155       97       58   37.4%   Alabama SuperComputer Network 
AS16758       63        6       57   90.5%   IKON Office Solutions 
AS3908       321      265       56   17.4%   Supernet, Inc. 
AS13999       70       14       56   80.0%   Mega Cable S.A. de C.V. 
AS6471       121       66       55   45.5%   ENTEL CHILE S.A. 
AS19834       63        8       55   87.3%   NetForce, Inc. 
AS1          509      454       55   10.8%   BBN Planet 
AS4323       366      312       54   14.8%   Time Warner Communications, Inc. 
AS2149       323      270       53   16.4%   Performance Systems, Inc. 
AS4200       103       51       52   50.5%   Apex Global Information Services,
AS209        297      246       51   17.2%   Qwest 


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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