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The Cidr Report

  • From: Tony Bates
  • Date: Fri Apr 07 15:05:38 2000


This is an auto-generated mail on Fri Apr  7 12:00:02 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      A summary of the last weeks changes in terms of withdrawn and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 07Apr00


0) General Status

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

Date	Prefixes
310300	74847
010400	74802
020400	74868
030400	74911
040400	75068
050400	74793
060400	74813
070400	75152

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


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

*** Bogus 65.45.0.0/19 from AS10585
*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 7138

Number of ASes announcing only one prefix:        3959 (2159 cidr, 1800 classful)

Largest number of  cidr routes:                    982 announced by  AS701
Largest number of classful routes:                1040 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 07Apr00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        437      152      285   65.2%   BCnet Backbone
AS7046       468      320      148   31.6%   COQUI-NET PRTC Internet
AS9706       155       21      134   86.5%   Pusan Metropolitan City Office of
AS9269       159       27      132   83.0%   Hong Kong CTI
AS1221       493      380      113   22.9%   TELSTRA-AS
AS2609       124       17      107   86.3%   EUnet-TN
AS7657       269      171       98   36.4%   The Internet Group Limited
AS705        314      218       96   30.6%   ALTERNET-AS
AS7545       159       64       95   59.7%   TPG Internet Pty Ltd
AS174        561      472       89   15.9%   Performance Systems International
AS4293       293      205       88   30.0%   Internal ASN for C&W
AS7496       125       38       87   69.6%   Power Up
AS6429       207      122       85   41.1%   RDC-INTERNET
AS9304       108       26       82   75.9%   Hutchcity
AS577        255      176       79   31.0%   Bell Backbone
AS7029       142       70       72   50.7%   ALLTELNET
AS209        446      378       68   15.2%   Qwest Communications
AS9557        80       15       65   81.2%   Pakistan Telecommunication Compan
AS1727       155       92       63   40.6%   MRMS-WEST
AS3602       309      247       62   20.1%   Sprint Canada Inc.
AS7260       110       50       60   54.5%   NORLIGHT
AS7018       519      459       60   11.6%   AT&T WorldNet Service Backbone
AS701       1040      981       59    5.7%   Alternet
AS3749       120       61       59   49.2%   TECNET
AS4740       339      281       58   17.1%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS724        199      143       56   28.1%   DLA-ASNBLOCK-AS
AS816        331      276       55   16.6%   UUNET Canada (ASN-UUNETCA-AS4)
AS7568        66       18       48   72.7%   C.S. Communications Co., Ltd.
AS6595        87       42       45   51.7%   DODDSEUR
AS5106        73       29       44   60.3%   AADS-COLUMBUS


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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