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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 29 15:04:33 1999


This is an auto-generated mail on Fri Oct 29 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      A summary of the last weeks changes in terms of withdrawn and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 29Oct99


0) General Status

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

Date	Prefixes
221099	65598
231099	65493
241099	65535
251099	65586
261099	66128
271099	65317
281099	65520
291099	65524

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


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

*** Bogus 100.0.0.0 from AS2561
*** Bogus 110.30.236.0/24 from AS577
*** Bogus 126.0.0.0 from AS2561

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

Number of ASes in routing system:                 5916

Number of ASes announcing only one prefix:        3138 (1731 cidr, 1407 classful)

Largest number of  cidr routes:                    601 announced by  AS701
Largest number of classful routes:                1017 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 29Oct99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        383      144      239   62.4%   BCnet Backbone
AS7046       426      255      171   40.1%   UUNET-CUSTOMER
AS2609       128        8      120   93.8%   EUnet-TN
AS6944       133       18      115   86.5%   RapidSite, Inc.
AS1221       625      515      110   17.6%   TELSTRA-AS
AS9269       131       30      101   77.1%   Hong Kong CTI
AS7657       250      162       88   35.2%   The Internet Group Limited
AS174        563      476       87   15.5%   Performance Systems International
AS577        265      180       85   32.1%   Bell Canada Backbone
AS4293       227      142       85   37.4%   Internal ASN for C&W
AS7545       140       64       76   54.3%   TPG Internet Pty Ltd
AS3749       140       64       76   54.3%   TECNET
AS7496       111       37       74   66.7%   Power Up
AS4200       183      110       73   39.9%   AGIS (Apex Global Information Ser
AS701       1017      954       63    6.2%   Alternet
AS209        321      268       53   16.5%   Qwest Communications
AS4740       339      287       52   15.3%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS684         92       46       46   50.0%   Manitoba Regional Network Backbon
AS816        226      181       45   19.9%   UUNET Canada (ASN-UUNETCA-AS4)
AS4755       109       68       41   37.6%   Videsh Sanchar Nigam Ltd. India
AS2493       132       92       40   30.3%   iSTAR Internet, Inc.
AS9304        54       15       39   72.2%   Hutchcity
AS6528        45        7       38   84.4%   WORLD-LYNX
AS549        213      175       38   17.8%   ONet Backbone
AS1          501      466       35    7.0%   GTE Internetworking
AS7568        47       13       34   72.3%   C.S. Communications Co., Ltd.
AS6172       143      110       33   23.1%   HOME-NET-1
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)
AS1785       237      205       32   13.5%   NYSERNet Backbone
AS9453        33        2       31   93.9%   Soongsil University


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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