The Cidr Report

Tony Bates tbates at cisco.com
Fri Dec 3 20:00:03 UTC 1999


This is an auto-generated mail on Fri Dec  3 12:00:01 PST 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      A summary of the last weeks changes in terms of withdrawn and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 03Dec99


0) General Status

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

Date	Prefixes
261199	67449
271199	67441
281199	67471
291199	67421
301199	67403
011299	67418
021299	67533
031299	67454

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


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

*** Bogus 64.4.64.0/19 from AS7398
*** Bogus 64.6.32.0/20 from AS13740
*** Bogus 64.6.64.0/20 from AS10726
*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 6165

Number of ASes announcing only one prefix:        3283 (1798 cidr, 1485 classful)

Largest number of  cidr routes:                    637 announced by  AS701
Largest number of classful routes:                 974 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 03Dec99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      141      242   63.2%   BCnet Backbone
AS7046       386      250      136   35.2%   UUNET-CUSTOMER
AS2609       126       11      115   91.3%   EUnet-TN
AS1221       633      519      114   18.0%   TELSTRA-AS
AS9269       130       28      102   78.5%   Hong Kong CTI
AS9706       112       11      101   90.2%   Pusan Metropolitan City Office of
AS7657       267      170       97   36.3%   The Internet Group Limited
AS1653       129       38       91   70.5%   SUNET Swedish University Network
AS7545       147       59       88   59.9%   TPG Internet Pty Ltd
AS174        565      479       86   15.2%   Performance Systems International
AS4293       227      142       85   37.4%   Internal ASN for C&W
AS7496       123       40       83   67.5%   Power Up
AS577        262      182       80   30.5%   Bell Canada Backbone
AS3749       136       62       74   54.4%   TECNET
AS4200       179      109       70   39.1%   AGIS (Apex Global Information Ser
AS3602       314      246       68   21.7%   Sprint Canada Inc.
AS816        255      196       59   23.1%   UUNET Canada (ASN-UUNETCA-AS4)
AS705        137       78       59   43.1%   ALTERNET-AS
AS4740       349      291       58   16.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS209        334      279       55   16.5%   Qwest Communications
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS701        974      931       43    4.4%   Alternet
AS9304        58       18       40   69.0%   Hutchcity
AS1          519      479       40    7.7%   GTE Internetworking
AS6528        45        7       38   84.4%   WORLD-LYNX
AS8013       135       99       36   26.7%   PSINET-CA
AS549        205      169       36   17.6%   ONet Backbone
AS4755       105       69       36   34.3%   Videsh Sanchar Nigam Ltd. India
AS7568        50       15       35   70.0%   C.S. Communications Co., Ltd.
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)


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




More information about the NANOG mailing list