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The Cidr Report
From: Tony Bates <tbates () cisco com>
Date: Fri, 23 Jan 1998 12:00:02 -0800


This is an auto-generated mail on Fri Jan 23 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      A summary of the last weeks changes in terms of withdrawn and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 23Jan98


0) General Status

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

Date    Prefixes
160198  48136
170198  47944
180198  47971
190198  48017
200198  48183
210198  48498
220198  48637
230198  48658

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


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

*** Bogus 212.192.0.0/16 from AS5568
*** Bogus 212.255.0.0/16 from AS2871

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

Number of ASes in routing system:                 3149

Number of ASes announcing only one prefix:        1462 (756 cidr, 706 classful)

Largest number of  cidr routes:                    450 announced by AS3561
Largest number of classful routes:                1005 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 23Jan98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       705      396      309   43.8%   iSTAR Internet, Inc.
AS6235       489      254      235   48.1%   Intermedia Communications, Inc.
AS4293       425      211      214   50.4%   IMCI
AS174        875      671      204   23.3%   Performance Systems International
AS816        581      404      177   30.5%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       453      301      152   33.6%   Sprint Canada Inc.
AS3749       201       60      141   70.1%   TECNET
AS701       1005      896      109   10.8%   Alternet
AS3751       123       47       76   61.8%   SNET-AS
AS2048       161       91       70   43.5%   LaNet
AS5668       106       40       66   62.3%   Century Telephone Inc.
AS3804       203      141       62   30.5%   Bell Solutions
AS1          846      787       59    7.0%   BBNPLANET
AS549        216      159       57   26.4%   ONet Backbone
AS271        111       56       55   49.5%   BCnet Backbone
AS3464       116       63       53   45.7%   Alabama Research and Education Ne
AS1239       578      526       52    9.0%   SprintLink Backbone
AS7545       114       66       48   42.1%   TPG Internet Pty Ltd
AS72          84       36       48   57.1%   Schlumberger Information Network
AS4763       127       79       48   37.8%   Telstra New Zealand
AS719        507      461       46    9.1%   LANLINK autonomous system
AS684         84       39       45   53.6%   Manitoba Regional Network Backbon
AS1221       257      212       45   17.5%   AARNET-AS
AS2711        97       55       42   43.3%   SUNBELT-AS
AS3561       922      881       41    4.4%   MCI
AS6335        62       24       38   61.3%   NTRNET
AS4740       333      295       38   11.4%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS4682        62       24       38   61.3%   ITJ Intelligent Telecom Inc.,
AS1691       161      123       38   23.6%   BCTEL
AS6332        83       46       37   44.6%   TELNOR


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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