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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 13 15:11:01 2000


This is an auto-generated mail on Fri Oct 13 12:00:01 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      A summary of the last weeks changes in terms of withdrawn and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 13Oct00


0) General Status

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

Date	Prefixes
061000	88980
071000	89153
081000	89078
091000	89463
101000	88806
111000	88726
121000	88590
131000	88713

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:                 8744

Number of ASes announcing only one prefix:        5030 (2804 cidr, 2226 classful)

Largest number of  cidr routes:                    919 announced by  AS701
Largest number of classful routes:                1123 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 13Oct00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        431      153      278   64.5%   BCnet Backbone
AS1221       611      443      168   27.5%   TELSTRA-AS
AS9269       178       45      133   74.7%   Hong Kong CTI
AS816        535      406      129   24.1%   UUNET Canada (ASN-UUNETCA-AS4)
AS2609       128        8      120   93.8%   EUnet-TN
AS9304       125       15      110   88.0%   Hutchcity
AS6429       222      112      110   49.5%   FirstCom Internet
AS4755       221      112      109   49.3%   Videsh Sanchar Nigam Ltd. India
AS7545       158       54      104   65.8%   TPG Internet Pty Ltd
AS705        363      262      101   27.8%   ALTERNET-AS
AS7046       345      252       93   27.0%   UUNET-CUSTOMER
AS7496       124       33       91   73.4%   Power Up
AS7657       308      221       87   28.2%   The Internet Group Limited
AS174        541      455       86   15.9%   Performance Systems International
AS4293       342      260       82   24.0%   Internal ASN for C&W
AS13999       91        9       82   90.1%   UNKNOWN
AS8013       441      360       81   18.4%   PSINET-CA
AS6595       137       56       81   59.1%   DODDSEUR
AS3908       254      175       79   31.1%   Supernet, Inc.
AS701       1123     1045       78    6.9%   Alternet
AS577        248      175       73   29.4%   Bell Backbone
AS724        222      155       67   30.2%   DLA-ASNBLOCK-AS
AS7018       574      508       66   11.5%   AT&T WorldNet Service Backbone
AS1727       150       85       65   43.3%   MRMS-WEST
AS5106       100       37       63   63.0%   AADS-COLUMBUS
AS3749       122       60       62   50.8%   TECNET
AS226        168      106       62   36.9%   USC/Information Sciences Institut
AS16758       63        6       57   90.5%   UNKNOWN
AS376        129       74       55   42.6%   RISQ
AS8151       179      125       54   30.2%   UNINET-MX


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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