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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 09 15:27:47 1998

This is an auto-generated mail on Fri Oct  9 12:00:00 PDT 1998
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      A summary of the last weeks changes in terms of withdrawn and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 09Oct98


0) General Status

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

Date	Prefixes
021098	52291
031098	52114
041098	52386
051098	52453
061098	52385
071098	52472
081098	52755
091098	52585

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


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

*** Bogus 100.100.100.0/24 from AS8013

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

Number of ASes in routing system:                 4085

Number of ASes announcing only one prefix:        1976 (1038 cidr, 938 classful)

Largest number of  cidr routes:                    344 announced by AS3561
Largest number of classful routes:                 941 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 09Oct98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        346      149      197   56.9%   BCnet Backbone
AS4293       418      246      172   41.1%   IMCI
AS2493       356      203      153   43.0%   iSTAR Internet, Inc.
AS3749       224       75      149   66.5%   TECNET
AS174        699      567      132   18.9%   PSINET
AS701        941      814      127   13.5%   ALTERNET-AS
AS4200       191       98       93   48.7%   AGIS-NET
AS5668       128       41       87   68.0%   CENTURY
AS3352       254      174       80   31.5%   Ibernet, Internet Access Network 
AS7046       261      186       75   28.7%   UUNET-CUSTOMER
AS3221       118       44       74   62.7%   EENet Autonomous System
AS3804       227      154       73   32.2%   Bell Solutions
AS4755       116       54       62   53.4%   Videsh Sanchar Nigam Ltd. India
AS4740       390      330       60   15.4%   OzEmail ISP
AS6335        70       21       49   70.0%   NTRNET
AS549        187      138       49   26.2%   ONet Backbone
AS7545       110       62       48   43.6%   TPG Internet Pty Ltd
AS72          87       39       48   55.2%   Schlumberger Information Network
AS1239       538      491       47    8.7%   SprintLink
AS803         77       33       44   57.1%   SaskNet Backbone
AS852        166      125       41   24.7%   AGT Advance Communication
AS4539        68       28       40   58.8%   NETROPOLIS
AS1221       325      285       40   12.3%   AARNET-AS
AS10928       86       49       37   43.0%   UNKNOWN
AS10459       47       10       37   78.7%   WANSASN
AS7122       119       83       36   30.3%   MTS ADVANCED Network Policy
AS6181        64       30       34   53.1%   FUSE-NET
AS2707        64       31       33   51.6%   WEC
AS1273        61       28       33   54.1%   ECRC Network
AS7496        66       35       31   47.0%   Power Up


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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