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 Feb 04 15:11:24 2000


This is an auto-generated mail on Fri Feb  4 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 04Feb00


0) General Status

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

Date	Prefixes
280100	70416
290100	70627
300100	70736
310100	70866
010200	71239
020200	71006
030200	71078
040200	71335

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


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

*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742

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

Number of ASes in routing system:                 6584

Number of ASes announcing only one prefix:        3579 (1939 cidr, 1640 classful)

Largest number of  cidr routes:                    714 announced by  AS701
Largest number of classful routes:                 982 announced by  AS701



1) Gains by aggregating at the origin AS level

 --- 04Feb00 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS271        439      153      286   65.1%   BCnet Backbone
AS7046       426      280      146   34.3%   UUNET-CUSTOMER
AS9269       141       25      116   82.3%   Hong Kong CTI
AS1221       633      519      114   18.0%   TELSTRA-AS
AS2609       123       18      105   85.4%   EUnet-TN
AS7657       286      188       98   34.3%   The Internet Group Limited
AS4293       265      169       96   36.2%   Internal ASN for C&W
AS2715       155       61       94   60.6%   REDERIO-AS
AS7545       154       61       93   60.4%   TPG Internet Pty Ltd
AS9706       116       29       87   75.0%   Pusan Metropolitan City Office of
AS6429       204      119       85   41.7%   RDC-INTERNET
AS174        555      472       83   15.0%   Performance Systems International
AS7496       121       39       82   67.8%   Power Up
AS705        296      216       80   27.0%   ALTERNET-AS
AS577        255      178       77   30.2%   Bell Backbone
AS3749       137       61       76   55.5%   TECNET
AS9304        99       24       75   75.8%   Hutchcity
AS816        373      298       75   20.1%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       314      246       68   21.7%   Sprint Canada Inc.
AS7029       112       47       65   58.0%   ALLTELNET
AS4200       169      104       65   38.5%   AGIS (Apex Global Information Ser
AS4740       333      275       58   17.4%   Ozemail Pty Ltd (ASN-OZEMAIL)
AS7260       103       46       57   55.3%   NORLIGHT
AS1727       124       70       54   43.5%   MRMS-WEST
AS209        384      333       51   13.3%   Qwest Communications
AS4151        97       50       47   48.5%   USDA Internet Access Network
AS9557        67       21       46   68.7%   Pakistan Telecommunication Compan
AS7568        59       15       44   74.6%   C.S. Communications Co., Ltd.
AS4000        88       45       43   48.9%   Global IP
AS684         87       45       42   48.3%   Manitoba Regional Network Backbon


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.