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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jul 10 15:12:02 1998

This is an auto-generated mail on Fri Jul 10 12:00:01 PDT 1998
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      A summary of the last weeks changes in terms of withdrawn and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 10Jul98


0) General Status

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

Date	Prefixes
020798	51673
030798	51528
050798	51481
060798	51579
070798	52104
080798	52116
090798	52255
100798	52359

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


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

*** Bogus 213.102.1.0 from AS3259
*** Bogus 214.0.0.0/8 from AS568
*** Bogus 215.0.0.0/9 from AS568
*** Bogus 216.0.0.0/14 from AS2548
*** Bogus 216.13.4.0/23 from AS6401
*** Bogus 216.13.32.0/19 from AS6401
*** Bogus 216.15.0.0/19 from AS10368
*** Bogus 216.15.128.0/19 from AS7393
*** Bogus 216.19.0.0/18 from AS4492
*** Bogus 216.214.0.0/18 from AS7194

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

Number of ASes in routing system:                 3726

Number of ASes announcing only one prefix:        1823 (952 cidr, 871 classful)

Largest number of  cidr routes:                    353 announced by AS3561
Largest number of classful routes:                1139 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 10Jul98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS4293       461      253      208   45.1%   IMCI
AS3602       514      310      204   39.7%   Sprint Canada Inc.
AS2493       485      281      204   42.1%   iSTAR Internet, Inc.
AS701       1139      937      202   17.7%   Alternet
AS271        339      144      195   57.5%   BCnet Backbone
AS3749       223       66      157   70.4%   TECNET
AS174        727      587      140   19.3%   Performance Systems International
AS2685       267      162      105   39.3%   IBM Global Network - US
AS4755       114       39       75   65.8%   Videsh Sanchar Nigam Ltd. India
AS3221       112       42       70   62.5%   EENet Autonomous System
AS5668       120       51       69   57.5%   Century Telephone Inc.
AS7046       226      161       65   28.8%   UUNET-CUSTOMER
AS3804       216      153       63   29.2%   Bell Solutions
AS4740       394      334       60   15.2%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS10928      102       45       57   55.9%   UNKNOWN
AS3403       181      127       54   29.8%   TIAC
AS549        205      152       53   25.9%   ONet Backbone
AS8517       123       72       51   41.5%   ULAKNET-ASN
AS6335        69       18       51   73.9%   NTRNET
AS72          85       37       48   56.5%   Schlumberger Information Network
AS4539        73       25       48   65.8%   NETROPOLIS
AS1239       543      496       47    8.7%   SprintLink Backbone
AS719        449      403       46   10.2%   LANLINK autonomous system
AS3218        70       24       46   65.7%   AS-RSSI
AS4200       140       95       45   32.1%   AGIS (Apex Global Information Ser
AS852        158      117       41   25.9%   AGT Advance Communication
AS7545       102       61       41   40.2%   TPG Internet Pty Ltd
AS762        118       80       38   32.2%   WELLFLEET-AS
AS1785       290      252       38   13.1%   NYSERNet Backbone
AS6181        65       28       37   56.9%   FUSE-NET


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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