Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

The Cidr Report

  • From: Tony Bates
  • Date: Fri Jul 30 15:04:15 1999


This is an auto-generated mail on Fri Jul 30 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      A summary of the last weeks changes in terms of withdrawn and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 30Jul99


0) General Status

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

Date	Prefixes
230799	61494
240799	61486
250799	61391
260799	61592
270799	61488
280799	61707
290799	61808
300799	61912

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:                 5372

Number of ASes announcing only one prefix:        2813 (1550 cidr, 1263 classful)

Largest number of  cidr routes:                    461 announced by  AS701
Largest number of classful routes:                 841 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 30Jul99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        348      147      201   57.8%   BCnet Backbone
AS2609       121       28       93   76.9%   EUnet-TN
AS174        578      486       92   15.9%   Performance Systems International
AS1221       537      445       92   17.1%   TELSTRA-AS
AS577        280      189       91   32.5%   Bell Canada Backbone
AS3749       153       63       90   58.8%   TECNET
AS4293       235      149       86   36.6%   IMCI
AS7046       322      237       85   26.4%   UUNET-CUSTOMER
AS4200       182      103       79   43.4%   AGIS (Apex Global Information Ser
AS7545       141       66       75   53.2%   TPG Internet Pty Ltd
AS7496       108       34       74   68.5%   Power Up
AS7657       229      156       73   31.9%   The Internet Group Limited
AS10928      119       49       70   58.8%   UNKNOWN
AS9269        76       16       60   78.9%   Hong Kong CTI
AS4755       138       79       59   42.8%   Videsh Sanchar Nigam Ltd. India
AS6944        63        6       57   90.5%   RapidSite, Inc.
AS4740       307      253       54   17.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS719        458      406       52   11.4%   LANLINK autonomous system
AS2493       159      110       49   30.8%   iSTAR Internet, Inc.
AS684         91       46       45   49.5%   Manitoba Regional Network Backbon
AS803         78       34       44   56.4%   SaskNet Backbone
AS549        215      172       43   20.0%   ONet Backbone
AS3737       108       67       41   38.0%   PenTeleData Inc. (ASN-PTD)
AS1785       253      215       38   15.0%   NYSERNet Backbone
AS209        251      216       35   13.9%   Qwest Communications
AS1          495      460       35    7.1%   BBNPLANET
AS10724       42        8       34   81.0%   UNKNOWN
AS6762        33        2       31   93.9%   Telecom Italia international high
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





Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.