The Cidr Report

Tony Bates tbates at cisco.com
Fri Nov 6 20:00:02 UTC 1998


This is an auto-generated mail on Fri Nov  6 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      A summary of the last weeks changes in terms of withdrawn and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 06Nov98


0) General Status

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

Date	Prefixes
301098	53608
311098	53383
011198	53362
021198	53333
031198	53404
041198	53761
051198	53388
061198	53673

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:                 4196

Number of ASes announcing only one prefix:        2042 (1076 cidr, 966 classful)

Largest number of  cidr routes:                    342 announced by AS3561
Largest number of classful routes:                 963 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 06Nov98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        347      148      199   57.3%   BCnet Backbone
AS1785       603      409      194   32.2%   NYSERNet Backbone
AS4293       407      230      177   43.5%   IMCI
AS3749       232       72      160   69.0%   TECNET
AS2493       344      194      150   43.6%   iSTAR Internet, Inc.
AS701        963      832      131   13.6%   Alternet
AS174        688      560      128   18.6%   Performance Systems International
AS4200       190       98       92   48.4%   AGIS (Apex Global Information Ser
AS5668       127       40       87   68.5%   Century Telephone Inc.
AS4740       395      332       63   15.9%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7046       254      196       58   22.8%   UUNET-CUSTOMER
AS4755       120       64       56   46.7%   Videsh Sanchar Nigam Ltd. India
AS7545       118       63       55   46.6%   APNIC-AS-2-BLOCK
AS8517       126       72       54   42.9%   UNKNOWN
AS6335        70       19       51   72.9%   NTRNET
AS549        197      147       50   25.4%   ONet Backbone
AS72          89       41       48   53.9%   Schlumberger Information Network
AS1239       522      476       46    8.8%   SprintLink Backbone
AS803         77       33       44   57.1%   SaskNet Backbone
AS3221        86       43       43   50.0%   RIPE-ASNBLOCK4
AS1221       345      302       43   12.5%   AARNET-AS
AS10928       92       49       43   46.7%   UNKNOWN
AS852        166      125       41   24.7%   AGT Advance Communication
AS7122       121       80       41   33.9%   MTS ADVANCED Network Policy
AS3804       182      143       39   21.4%   Bell Solutions
AS6181        64       30       34   53.1%   FUSE-NET
AS4539        66       32       34   51.5%   NETROPOLIS
AS2707        65       32       33   50.8%   WEC
AS7496        66       34       32   48.5%   APNIC-AS-2-BLOCK
AS4307        32        1       31   96.9%   SVINET-1


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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