Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

The Cidr Report

  • From: Tony Bates
  • Date: Fri Apr 21 15:07:00 2000


This is an auto-generated mail on Fri Apr 21 12:00:01 PDT 2000
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      A summary of the last weeks changes in terms of withdrawn and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 21Apr00


0) General Status

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

Date	Prefixes
060400	74813
070400	75152
080400	75151
090400	75137
100400	75215
110400	75403
120400	75730
130400	75919

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


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


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

Number of ASes in routing system:                 4983

Number of ASes announcing only one prefix:        1838 (0 cidr, 1838 classful)

Largest number of  cidr routes:                      0 announced by       
Largest number of classful routes:                1043 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 21Apr00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        351      131      220   62.7%   BCnet Backbone
AS7046       474      322      152   32.1%   COQUI-NET PRTC Internet
AS9269       163       26      137   84.0%   Hong Kong CTI
AS9706       153       30      123   80.4%   Pusan Metropolitan City Office of
AS1221       468      357      111   23.7%   TELSTRA-AS
AS2609       124       17      107   86.3%   EUnet-TN
AS7657       268      170       98   36.6%   The Internet Group Limited
AS7545       160       65       95   59.4%   TPG Internet Pty Ltd
AS705        309      214       95   30.7%   ALTERNET-AS
AS4293       305      215       90   29.5%   Internal ASN for C&W
AS174        558      470       88   15.8%   Performance Systems International
AS7496       126       39       87   69.0%   Power Up
AS6429       205      121       84   41.0%   RDC-INTERNET
AS7029       153       72       81   52.9%   ALLTELNET
AS9304       105       29       76   72.4%   Hutchcity
AS577        250      174       76   30.4%   Bell Backbone
AS209        458      385       73   15.9%   Qwest Communications
AS9557        80       15       65   81.2%   Pakistan Telecommunication Compan
AS1727       144       80       64   44.4%   MRMS-WEST
AS724        205      143       62   30.2%   DLA-ASNBLOCK-AS
AS3602       309      247       62   20.1%   Sprint Canada Inc.
AS7260       109       49       60   55.0%   NORLIGHT
AS701       1043      983       60    5.8%   Alternet
AS7018       518      459       59   11.4%   AT&T WorldNet Service Backbone
AS3749       114       56       58   50.9%   TECNET
AS816        333      277       56   16.8%   UUNET Canada (ASN-UUNETCA-AS4)
AS4740       337      281       56   16.6%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS6595       101       48       53   52.5%   DODDSEUR
AS7568        68       18       50   73.5%   C.S. Communications Co., Ltd.
AS2563       125       76       49   39.2%   KoRean Education Network


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





Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.