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The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 04 15:36:07 1998

This is an auto-generated mail on Fri Dec  4 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 04Dec98


0) General Status

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

Date	Prefixes
271198	54161
281198	53936
291198	53897
301198	54139
011298	54213
021298	54287
031298	54269
041298	56909

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:                 4292

Number of ASes announcing only one prefix:        2100 (1123 cidr, 977 classful)

Largest number of  cidr routes:                    353 announced by AS3561
Largest number of classful routes:                 981 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 04Dec98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        349      152      197   56.4%   BCnet Backbone
AS3749       230       70      160   69.6%   TECNET
AS2493       335      188      147   43.9%   iSTAR Internet, Inc.
AS1785       534      400      134   25.1%   NYSERNet Backbone
AS701        981      848      133   13.6%   Alternet
AS174        688      557      131   19.0%   Performance Systems International
AS5668       125       39       86   68.8%   Century Telephone Inc.
AS4200       170       90       80   47.1%   AGIS (Apex Global Information Ser
AS1267       109       30       79   72.5%   IUNET-AS
AS4755       135       63       72   53.3%   Videsh Sanchar Nigam Ltd. India
AS4293       205      133       72   35.1%   IMCI
AS549        223      155       68   30.5%   ONet Backbone
AS4740       388      328       60   15.5%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221       387      330       57   14.7%   AARNET-AS
AS8517       127       71       56   44.1%   UNKNOWN
AS7046       258      202       56   21.7%   UUNET-CUSTOMER
AS6335        71       19       52   73.2%   NTRNET
AS7545       117       66       51   43.6%   TPG Internet Pty Ltd
AS72          88       40       48   54.5%   Schlumberger Information Network
AS7657       134       87       47   35.1%   The Internet Group Limited
AS1239       524      477       47    9.0%   SprintLink Backbone
AS577        210      165       45   21.4%   CA*net Networking Inc Backbone
AS7496        75       31       44   58.7%   Power Up
AS3221        84       42       42   50.0%   RIPE-ASNBLOCK4
AS852        170      129       41   24.1%   AGT Advance Communication
AS10928       89       48       41   46.1%   UNKNOWN
AS719        440      401       39    8.9%   LANLINK-AS
AS7122       113       76       37   32.7%   MTS ADVANCED Network Policy
AS803         71       35       36   50.7%   SaskNet Backbone
AS3564        69       36       33   47.8%   Microserve Infromation Systems In


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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