North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 15 15:11:07 2000

This is an auto-generated mail on Fri Dec 15 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      A summary of the last weeks changes in terms of withdrawn and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 15Dec00


0) General Status

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

Date	Prefixes
081200	95404
091200	95823
101200	95806
111200	95907
121200	95679
131200	95592
141200	95583
151200	95822

Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.


Possible Bogus Routes
---------------------

*** Bogus 91.16.23.0/24 from AS11770
*** Bogus 219.219.219.0 from AS2563

AS Summary
----------

Number of ASes in routing system:                 9359

Number of ASes announcing only one prefix:        5425 (3034 cidr, 2391 classful)

Largest number of  cidr routes:                   1190 announced by  AS705
Largest number of classful routes:                1678 announced by AS1221



1) Gains by aggregating at the origin AS level

 --- 15Dec00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS1221      1678     1238      440   26.2%   TELSTRA-AS
AS2563       264       82      182   68.9%   KoRean Education Network
AS701       1593     1434      159   10.0%   Alternet
AS271        284      131      153   53.9%   BCnet Backbone
AS9269       167       48      119   71.3%   Hong Kong CTI
AS7545       166       50      116   69.9%   TPG Internet Pty Ltd
AS8013       455      349      106   23.3%   PSINET-CA
AS6595       162       63       99   61.1%   DODDSEUR
AS7657       277      188       89   32.1%   The Internet Group Limited
AS13999       94        6       88   93.6%   UNKNOWN
AS705        326      242       84   25.8%   ALTERNET-AS
AS4755       189      105       84   44.4%   Videsh Sanchar Nigam Ltd. India
AS174        530      449       81   15.3%   Performance Systems International
AS4293       340      260       80   23.5%   Internal ASN for C&W
AS7496       100       23       77   77.0%   Power Up
AS7046       328      251       77   23.5%   UUNET-CUSTOMER
AS4151       282      208       74   26.2%   USDA Internet Access Network
AS724        243      170       73   30.0%   DLA-ASNBLOCK-AS
AS1727       172       99       73   42.4%   MRMS-WEST
AS3908       236      164       72   30.5%   Supernet, Inc.
AS1942       137       65       72   52.6%   FR-CICG-GRENOBLE
AS577        242      171       71   29.3%   Bell Backbone
AS7018       594      528       66   11.1%   AT&T WorldNet Service Backbone
AS5106       101       37       64   63.4%   AADS-COLUMBUS
AS3749       123       59       64   52.0%   TECNET
AS226        167      104       63   37.7%   USC/Information Sciences Institut
AS3602       307      249       58   18.9%   Sprint Canada Inc.
AS2548       366      308       58   15.8%   DIGEX-AS
AS16758       63        6       57   90.5%   UNKNOWN
AS376        133       77       56   42.1%   RISQ


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