The Cidr Report

Tony Bates tbates at cisco.com
Fri Nov 5 20:00:03 UTC 1999


This is an auto-generated mail on Fri Nov  5 12:00:00 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      A summary of the last weeks changes in terms of withdrawn and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 05Nov99


0) General Status

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

Date	Prefixes
301099	65527
311099	65581
311099	65559
011199	65613
021199	65961
031199	65896
041199	66135
051199	66177

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


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

*** Bogus 110.30.236.0/24 from AS577
*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 5979

Number of ASes announcing only one prefix:        3170 (1742 cidr, 1428 classful)

Largest number of  cidr routes:                    626 announced by  AS701
Largest number of classful routes:                 965 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 05Nov99 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        384      142      242   63.0%   BCnet Backbone
AS7046       435      261      174   40.0%   UUNET-CUSTOMER
AS6944       134       19      115   85.8%   RapidSite, Inc.
AS1221       626      514      112   17.9%   TELSTRA-AS
AS2609       126       16      110   87.3%   EUnet-TN
AS9269       132       26      106   80.3%   Hong Kong CTI
AS7657       249      161       88   35.3%   The Internet Group Limited
AS174        563      476       87   15.5%   Performance Systems International
AS7545       144       58       86   59.7%   TPG Internet Pty Ltd
AS577        265      180       85   32.1%   Bell Canada Backbone
AS4293       222      140       82   36.9%   Internal ASN for C&W
AS7496       118       37       81   68.6%   Power Up
AS3749       138       63       75   54.3%   TECNET
AS4200       180      110       70   38.9%   AGIS (Apex Global Information Ser
AS209        328      269       59   18.0%   Qwest Communications
AS4740       340      287       53   15.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS2764       472      422       50   10.6%   connect.com.au pty ltd
AS816        226      181       45   19.9%   UUNET Canada (ASN-UUNETCA-AS4)
AS684         91       46       45   49.5%   Manitoba Regional Network Backbon
AS9304        55       16       39   70.9%   Hutchcity
AS4755       107       68       39   36.4%   Videsh Sanchar Nigam Ltd. India
AS6528        45        7       38   84.4%   WORLD-LYNX
AS549        215      177       38   17.7%   ONet Backbone
AS2493       125       87       38   30.4%   iSTAR Internet, Inc.
AS701        965      928       37    3.8%   Alternet
AS719        199      163       36   18.1%   LANLINK autonomous system
AS1          501      466       35    7.0%   GTE Internetworking
AS7568        48       14       34   70.8%   C.S. Communications Co., Ltd.
AS3737        99       66       33   33.3%   PenTeleData Inc. (ASN-PTD)
AS1785       237      205       32   13.5%   NYSERNet Backbone


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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