The Cidr Report

Fri Apr 16 19:00:03 UTC 1999

This is an auto-generated mail on Fri Apr 16 12:00:00 PDT 1999
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      A summary of the last weeks changes in terms of withdrawn and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 16Apr99

0) General Status

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

Date	Prefixes
090499	58050
100499	58045
110499	58080
120499	58147
130499	58117
140499	58177
150499	58448
160499	58374

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:                 3500

Number of ASes announcing only one prefix:        1134 (0 cidr, 1134 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                 815 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 16Apr99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        355      147      208   58.6%   BCnet Backbone
AS4293       290      183      107   36.9%   IMCI
AS226        206      100      106   51.5%   USC/Information Sciences Institut
AS174        586      492       94   16.0%   Performance Systems International
AS577        270      177       93   34.4%   Bell Canada Backbone
AS4755       168       78       90   53.6%   Videsh Sanchar Nigam Ltd. India
AS2493       219      131       88   40.2%   iSTAR Internet, Inc.
AS1785       457      369       88   19.3%   NYSERNet Backbone
AS3749       141       63       78   55.3%   TECNET
AS4200       167       96       71   42.5%   AGIS (Apex Global Information Ser
AS1267        94       24       70   74.5%   IUNET-AS
AS7496        96       30       66   68.8%   Power Up
AS7545       110       46       64   58.2%   TPG Internet Pty Ltd
AS1221       445      381       64   14.4%   AARNET-AS
AS7046       258      197       61   23.6%   UUNET-CUSTOMER
AS4740       339      278       61   18.0%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7657       180      121       59   32.8%   The Internet Group Limited
AS1239       526      467       59   11.2%   SprintLink Backbone
AS10928      110       52       58   52.7%   UNKNOWN
AS72          92       40       52   56.5%   Schlumberger Information Network
AS719        464      412       52   11.2%   LANLINK autonomous system
AS3493       233      182       51   21.9%   INTERLINK
AS5674        80       36       44   55.0%   PBI-NET-BLK
AS3737       110       70       40   36.4%   PenTeleData Inc. (ASN-PTD)
AS803         74       38       36   48.6%   SaskNet Backbone
AS7745        39        4       35   89.7%   BIGSKY-AS
AS1          505      470       35    6.9%   BBNPLANET
AS7122       111       78       33   29.7%   MTS ADVANCED Network Policy
AS4307        32        1       31   96.9%   SVINET-1
AS11515       32        1       31   96.9%   UNKNOWN

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