The Cidr Report

Fri Oct 2 19:00:01 UTC 1998

This is an auto-generated mail on Fri Oct  2 12:00:00 PDT 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      A summary of the last weeks changes in terms of withdrawn and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 02Oct98

0) General Status

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

Date	Prefixes
250998	51953
260998	51968
270998	51990
280998	52031
290998	52015
300998	52050
011098	52146
021098	52291

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:                 4081

Number of ASes announcing only one prefix:        1973 (1035 cidr, 938 classful)

Largest number of  cidr routes:                    342 announced by AS3561
Largest number of classful routes:                 953 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 02Oct98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        346      149      197   56.9%   BCnet Backbone
AS4293       419      246      173   41.3%   IMCI
AS3749       231       75      156   67.5%   TECNET
AS2493       361      206      155   42.9%   iSTAR Internet, Inc.
AS701        953      817      136   14.3%   Alternet
AS174        695      564      131   18.8%   Performance Systems International
AS4200       191       98       93   48.7%   AGIS (Apex Global Information Ser
AS5668       128       41       87   68.0%   Century Telephone Inc.
AS3221       118       44       74   62.7%   EENet Autonomous System
AS3804       227      154       73   32.2%   Bell Solutions
AS7046       251      181       70   27.9%   UUNET-CUSTOMER
AS2685       219      151       68   31.1%   IBM Global Network - US
AS4755       119       54       65   54.6%   Videsh Sanchar Nigam Ltd. India
AS4740       395      332       63   15.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517       124       71       53   42.7%   ULAKNET-ASN
AS6335        70       21       49   70.0%   NTRNET
AS549        196      147       49   25.0%   ONet Backbone
AS72          87       39       48   55.2%   Schlumberger Information Network
AS1239       538      491       47    8.7%   SprintLink Backbone
AS7545       108       63       45   41.7%   TPG Internet Pty Ltd
AS803         77       33       44   57.1%   SaskNet Backbone
AS4539        68       28       40   58.8%   NETROPOLIS
AS1221       314      274       40   12.7%   AARNET-AS
AS10928       87       47       40   46.0%   UNKNOWN
AS7122       121       82       39   32.2%   MTS ADVANCED Network Policy
AS852        164      126       38   23.2%   AGT Advance Communication
AS10459       47       10       37   78.7%   WANSASN
AS7657        77       43       34   44.2%   The Internet Group Limited
AS6181        64       30       34   53.1%   FUSE-NET
AS2707        64       31       33   51.6%   WEC

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