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The Cidr Report

  • From: Tony Bates
  • Date: Fri Jul 17 15:44:36 1998

This is an auto-generated mail on Fri Jul 17 12:00:00 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      A summary of the last weeks changes in terms of withdrawn and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 17Jul98


0) General Status

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

Date	Prefixes
100798	52359
110798	52365
120798	52291
130798	52391
140798	52359
150798	52389
160798	52656
170798	52681

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 216.13.0.0/19 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 216.16.0.0/19 from AS6304
*** Bogus 216.18.0.0/19 from AS6539
*** Bogus 216.19.0.0/18 from AS4492
*** Bogus 216.22.0.0/19 from AS7960
*** Bogus 216.23.0.0/19 from AS8079
*** Bogus 216.27.0.0 from AS7349
*** Bogus 216.214.0.0/18 from AS7194

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

Number of ASes in routing system:                 3750

Number of ASes announcing only one prefix:        1827 (964 cidr, 863 classful)

Largest number of  cidr routes:                    360 announced by AS3561
Largest number of classful routes:                1143 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 17Jul98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       485      278      207   42.7%   iSTAR Internet, Inc.
AS3602       516      311      205   39.7%   Sprint Canada Inc.
AS701       1143      941      202   17.7%   Alternet
AS271        340      144      196   57.6%   BCnet Backbone
AS4293       450      257      193   42.9%   IMCI
AS3749       223       66      157   70.4%   TECNET
AS174        731      589      142   19.4%   Performance Systems International
AS2685       266      161      105   39.5%   IBM Global Network - US
AS5668       135       49       86   63.7%   Century Telephone Inc.
AS2764       428      347       81   18.9%   connect.com.au pty ltd
AS4755       117       41       76   65.0%   Videsh Sanchar Nigam Ltd. India
AS3221       112       42       70   62.5%   EENet Autonomous System
AS3804       220      155       65   29.5%   Bell Solutions
AS7046       228      165       63   27.6%   UUNET-CUSTOMER
AS4740       401      344       57   14.2%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS10928      102       45       57   55.9%   UNKNOWN
AS3403       179      127       52   29.1%   TIAC
AS8517       123       72       51   41.5%   ULAKNET-ASN
AS6335        68       19       49   72.1%   NTRNET
AS72          85       37       48   56.5%   Schlumberger Information Network
AS1239       540      493       47    8.7%   SprintLink Backbone
AS719        450      404       46   10.2%   LANLINK autonomous system
AS4539        71       26       45   63.4%   NETROPOLIS
AS4200       142       97       45   31.7%   AGIS (Apex Global Information Ser
AS852        157      116       41   26.1%   AGT Advance Communication
AS762        118       80       38   32.2%   WELLFLEET-AS
AS1785       287      249       38   13.2%   NYSERNet Backbone
AS6392        66       29       37   56.1%   MidWest Communications, Inc.
AS6181        65       28       37   56.9%   FUSE-NET
AS549        174      137       37   21.3%   ONet 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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