The Cidr Report

Fri Jan 2 20:00:01 UTC 1998

This is an auto-generated mail on Fri Jan  2 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      A summary of the last weeks changes in terms of withdrawn and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 02Jan98

0) General Status

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

Date	Prefixes
261297	47433
271297	47424
281297	47380
291297	47497
301297	47601
311297	47560
010198	47266
020198	47531

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:                 3075

Number of ASes announcing only one prefix:        1452 (758 cidr, 694 classful)

Largest number of  cidr routes:                    521 announced by AS3561
Largest number of classful routes:                 973 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 02Jan98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       698      391      307   44.0%   iSTAR Internet, Inc.
AS4293       417      199      218   52.3%   IMCI
AS174        882      675      207   23.5%   Performance Systems International
AS816        571      399      172   30.1%   UUNET Canada (ASN-UUNETCA-AS4)
AS3602       457      300      157   34.4%   Sprint Canada Inc.
AS3749       190       54      136   71.6%   TECNET
AS701        973      878       95    9.8%   Alternet
AS839        123       31       92   74.8%   North West Territories Regional N
AS3751       119       46       73   61.3%   SNET-AS
AS5668       102       37       65   63.7%   Century Telephone Inc.
AS2048       153       88       65   42.5%   LaNet
AS3804       202      140       62   30.7%   Bell Solutions
AS1          869      808       61    7.0%   BBNPLANET
AS549        218      161       57   26.1%   ONet Backbone
AS271        111       56       55   49.5%   BCnet Backbone
AS7545       115       63       52   45.2%   TPG Internet Pty Ltd
AS3464       119       67       52   43.7%   Alabama Research and Education Ne
AS1239       580      528       52    9.0%   SprintLink Backbone
AS4763       126       75       51   40.5%   Telstra New Zealand
AS4747       114       64       50   43.9%   Taiwan Telecommunication Network 
AS4648       190      140       50   26.3%   NZIX 2
AS72          84       36       48   57.1%   Schlumberger Information Network
AS719        505      460       45    8.9%   LANLINK autonomous system
AS3561       936      894       42    4.5%   MCI
AS1221       256      215       41   16.0%   AARNET-AS
AS684         82       43       39   47.6%   Manitoba Regional Network Backbon
AS6181        60       21       39   65.0%   FUSE-NET
AS4740       330      291       39   11.8%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS2711        96       57       39   40.6%   SUNBELT-AS
AS1691       164      125       39   23.8%   BCTEL

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