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The Cidr Report
From: Tony Bates <tbates () cisco com>
Date: Fri, 30 Jan 1998 12:00:02 -0800


This is an auto-generated mail on Fri Jan 30 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      A summary of the last weeks changes in terms of withdrawn and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 30Jan98


0) General Status

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

Date    Prefixes
230198  48658
240198  48671
250198  48612
260198  49037
270198  49125
280198  49117
290198  50396
300198  50242

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


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

*** Bogus 95.9.43.0/24 from AS2878
*** Bogus 212.192.0.0/16 from AS5568
*** Bogus 212.255.0.0/16 from AS2871

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

Number of ASes in routing system:                 3169

Number of ASes announcing only one prefix:        1477 (766 cidr, 711 classful)

Largest number of  cidr routes:                   1103 announced by  AS719
Largest number of classful routes:                1022 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 30Jan98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       726      386      340   46.8%   iSTAR Internet, Inc.
AS6235       495      252      243   49.1%   Intermedia Communications, Inc.
AS4293       424      215      209   49.3%   IMCI
AS174        856      659      197   23.0%   Performance Systems International
AS816        598      417      181   30.3%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       456      304      152   33.3%   Sprint Canada Inc.
AS3749       200       59      141   70.5%   TECNET
AS701       1022      909      113   11.1%   Alternet
AS1785       456      371       85   18.6%   NYSERNet Backbone
AS3751       123       47       76   61.8%   SNET-AS
AS2048       165       93       72   43.6%   LaNet
AS5668       107       40       67   62.6%   Century Telephone Inc.
AS1239       602      539       63   10.5%   SprintLink Backbone
AS3804       203      141       62   30.5%   Bell Solutions
AS1          842      784       58    6.9%   BBNPLANET
AS271        111       56       55   49.5%   BCnet Backbone
AS3464       119       67       52   43.7%   Alabama Research and Education Ne
AS719        519      468       51    9.8%   LANLINK autonomous system
AS549        210      160       50   23.8%   ONet Backbone
AS7545       115       67       48   41.7%   TPG Internet Pty Ltd
AS72          84       36       48   57.1%   Schlumberger Information Network
AS4763       128       80       48   37.5%   Telstra New Zealand
AS1221       263      218       45   17.1%   AARNET-AS
AS7046       123       81       42   34.1%   UUNET-CUSTOMER
AS2711        97       55       42   43.3%   SUNBELT-AS
AS684         85       44       41   48.2%   Manitoba Regional Network Backbon
AS3561       914      873       41    4.5%   MCI
AS852        155      116       39   25.2%   AGT Advance Communication
AS6335        62       24       38   61.3%   NTRNET
AS1691       162      124       38   23.5%   BCTEL


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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