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The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 31 15:03:32 1999


This is an auto-generated mail on Fri Dec 31 12:00:00 PST 1999
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      A summary of the last weeks changes in terms of withdrawn and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 31Dec99


0) General Status

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

Date	Prefixes
241299	69384
251299	69404
261299	69325
271299	69066
281299	69066
291299	69048
301299	69139
311299	68794

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


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

*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 6346

Number of ASes announcing only one prefix:        3404 (1871 cidr, 1533 classful)

Largest number of  cidr routes:                    676 announced by  AS701
Largest number of classful routes:                 957 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 31Dec99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      141      242   63.2%   BCnet Backbone
AS7046       398      260      138   34.7%   UUNET-CUSTOMER
AS9269       134       21      113   84.3%   Hong Kong CTI
AS1221       636      525      111   17.5%   TELSTRA-AS
AS2609       124       20      104   83.9%   EUnet-TN
AS7657       281      182       99   35.2%   The Internet Group Limited
AS7545       153       60       93   60.8%   TPG Internet Pty Ltd
AS1653       129       38       91   70.5%   SUNET Swedish University Network
AS4293       238      150       88   37.0%   Internal ASN for C&W
AS6429       198      117       81   40.9%   RDC-INTERNET
AS174        550      469       81   14.7%   Performance Systems International
AS577        258      180       78   30.2%   Bell Canada Backbone
AS7496       111       36       75   67.6%   Power Up
AS9706       101       28       73   72.3%   Pusan Metropolitan City Office of
AS3749       128       57       71   55.5%   TECNET
AS705        237      171       66   27.8%   ALTERNET-AS
AS4200       171      105       66   38.6%   AGIS (Apex Global Information Ser
AS9304        82       21       61   74.4%   Hutchcity
AS816        233      177       56   24.0%   UUNET Canada (ASN-UUNETCA-AS4)
AS209        344      289       55   16.0%   Qwest Communications
AS4740       302      251       51   16.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS4755       114       73       41   36.0%   Videsh Sanchar Nigam Ltd. India
AS1          519      479       40    7.7%   GTE Internetworking
AS1727       119       80       39   32.8%   MRMS-WEST
AS7568        54       16       38   70.4%   C.S. Communications Co., Ltd.
AS701        957      919       38    4.0%   Alternet
AS6528        46        8       38   82.6%   WORLD-LYNX
AS7029        78       41       37   47.4%   ALLTELNET
AS8013       128       92       36   28.1%   PSINET-CA


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