The Cidr Report

Tony Bates tbates at cisco.com
Fri May 21 19:00:02 UTC 1999


This is an auto-generated mail on Fri May 21 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      A summary of the last weeks changes in terms of withdrawn and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 21May99


0) General Status

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

Date	Prefixes
140599	59083
150599	59128
160599	59127
170599	59193
180599	59298
190599	59365
200599	59432
210599	59570

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


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

*** Bogus 221.43.160.0/19 from AS12323

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

Number of ASes in routing system:                 5001

Number of ASes announcing only one prefix:        2569 (1395 cidr, 1174 classful)

Largest number of  cidr routes:                    400 announced by  AS701
Largest number of classful routes:                 810 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 21May99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        354      144      210   59.3%   BCnet Backbone
AS4293       270      165      105   38.9%   IMCI
AS174        595      497       98   16.5%   Performance Systems International
AS4755       175       86       89   50.9%   Videsh Sanchar Nigam Ltd. India
AS2493       209      124       85   40.7%   iSTAR Internet, Inc.
AS577        254      175       79   31.1%   Bell Canada Backbone
AS3749       141       64       77   54.6%   TECNET
AS4200       174       98       76   43.7%   AGIS (Apex Global Information Ser
AS1267        94       24       70   74.5%   IUNET-AS
AS7496        99       30       69   69.7%   Power Up
AS1785       384      321       63   16.4%   NYSERNet Backbone
AS7545       111       49       62   55.9%   TPG Internet Pty Ltd
AS7122       139       78       61   43.9%   MTS ADVANCED Network Policy
AS1221       458      397       61   13.3%   TELSTRA-AS
AS9269        68        9       59   86.8%   Hong Kong CTI
AS10928      111       54       57   51.4%   UNKNOWN
AS7657       170      114       56   32.9%   The Internet Group Limited
AS72          94       39       55   58.5%   Schlumberger Information Network
AS4740       329      274       55   16.7%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS719        475      421       54   11.4%   LANLINK autonomous system
AS1239       525      471       54   10.3%   SprintLink Backbone
AS7046       251      205       46   18.3%   UUNET-CUSTOMER
AS3737       111       73       38   34.2%   PenTeleData Inc. (ASN-PTD)
AS803         73       37       36   49.3%   SaskNet Backbone
AS1          499      464       35    7.0%   BBNPLANET
AS4307        32        1       31   96.9%   SVINET-1
AS3549       132      101       31   23.5%   Frontier GlobalCenter
AS2907       208      177       31   14.9%   SINET
AS11515       32        1       31   96.9%   UNKNOWN
AS10479       36        5       31   86.1%   ITESM-Rectoria Zona Norte


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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