The Cidr Report

Fri Mar 13 20:00:02 UTC 1998

This is an auto-generated mail on Fri Mar 13 12:00:00 PST 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      A summary of the last weeks changes in terms of withdrawn and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 13Mar98

0) General Status

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

Date	Prefixes
060398	49432
070398	49627
080398	49377
090398	49596
100398	49567
110398	49538
120398	49727
130398	51228

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:                 3331

Number of ASes announcing only one prefix:        1563 (810 cidr, 753 classful)

Largest number of  cidr routes:                   1773 announced by AS3561
Largest number of classful routes:                1015 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 13Mar98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       581      359      222   38.2%   iSTAR Internet, Inc.
AS4293       435      216      219   50.3%   IMCI
AS816        627      445      182   29.0%   UUNET Canada (ASN-UUNETCA-AS4)
AS174        805      643      162   20.1%   Performance Systems International
AS3749       218       63      155   71.1%   TECNET
AS3602       459      304      155   33.8%   Sprint Canada Inc.
AS701       1015      866      149   14.7%   Alternet
AS3751       125       48       77   61.6%   SNET-AS
AS5668       108       40       68   63.0%   Century Telephone Inc.
AS3804       205      142       63   30.7%   Bell Solutions
AS2048       154       91       63   40.9%   LaNet
AS3221        95       35       60   63.2%   EENet Autonomous System
AS1239       557      500       57   10.2%   SprintLink Backbone
AS271        111       55       56   50.5%   BCnet Backbone
AS10928       98       43       55   56.1%   UNKNOWN
AS4755        83       33       50   60.2%   Videsh Sanchar Nigam Ltd. India
AS72          84       36       48   57.1%   Schlumberger Information Network
AS1221       270      222       48   17.8%   AARNET-AS
AS549        208      161       47   22.6%   ONet Backbone
AS4763       122       76       46   37.7%   Telstra New Zealand
AS6181        70       25       45   64.3%   FUSE-NET
AS7046       140       96       44   31.4%   UUNET-CUSTOMER
AS3561      1004      961       43    4.3%   MCI
AS6335        64       22       42   65.6%   NTRNET
AS2711        97       55       42   43.3%   SUNBELT-AS
AS10722       73       31       42   57.5%   Aluminum Co. of America
AS4740       350      311       39   11.1%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS3493       166      127       39   23.5%   INTERLINK
AS4200       128       90       38   29.7%   AGIS (Apex Global Information Ser
AS719        427      390       37    8.7%   LANLINK autonomous system

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