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The Cidr Report

  • From: Tony Bates
  • Date: Fri Dec 11 16:01:38 1998

This is an auto-generated mail on Fri Dec 11 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      A summary of the last weeks changes in terms of withdrawn and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 11Dec98


0) General Status

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

Date	Prefixes
041298	56909
051298	54481
061298	54434
071298	54459
081298	54420
091298	54487
101298	54540
111298	54438

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:                 4309

Number of ASes announcing only one prefix:        2109 (1119 cidr, 990 classful)

Largest number of  cidr routes:                    357 announced by AS3561
Largest number of classful routes:                 981 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 11Dec98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        349      152      197   56.4%   BCnet Backbone
AS3749       230       70      160   69.6%   TECNET
AS2493       331      184      147   44.4%   iSTAR Internet, Inc.
AS1785       542      402      140   25.8%   NYSERNet Backbone
AS701        981      845      136   13.9%   Alternet
AS174        678      548      130   19.2%   Performance Systems International
AS4200       188       96       92   48.9%   AGIS (Apex Global Information Ser
AS5668       125       39       86   68.8%   Century Telephone Inc.
AS1267       109       30       79   72.5%   IUNET-AS
AS4293       205      133       72   35.1%   IMCI
AS4755       136       65       71   52.2%   Videsh Sanchar Nigam Ltd. India
AS549        220      154       66   30.0%   ONet Backbone
AS4740       387      326       61   15.8%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221       396      338       58   14.6%   AARNET-AS
AS8517       127       71       56   44.1%   UNKNOWN
AS7046       249      196       53   21.3%   UUNET-CUSTOMER
AS7545       116       66       50   43.1%   TPG Internet Pty Ltd
AS7657       136       88       48   35.3%   The Internet Group Limited
AS72          88       40       48   54.5%   Schlumberger Information Network
AS1239       524      477       47    9.0%   SprintLink Backbone
AS7496        75       30       45   60.0%   Power Up
AS577        209      164       45   21.5%   CA*net Networking Inc Backbone
AS3221        84       42       42   50.0%   RIPE-ASNBLOCK4
AS852        172      131       41   23.8%   AGT Advance Communication
AS10928       88       47       41   46.6%   UNKNOWN
AS719        438      401       37    8.4%   LANLINK-AS
AS803         71       35       36   50.7%   SaskNet Backbone
AS3564        69       36       33   47.8%   Microserve Infromation Systems In
AS2707        65       32       33   50.8%   WEC
AS7122       107       75       32   29.9%   MTS ADVANCED Network Policy


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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