The Cidr Report

Fri May 22 19:00:02 UTC 1998

This is an auto-generated mail on Fri May 22 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      A summary of the last weeks changes in terms of withdrawn and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 22May98

0) General Status

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

Date	Prefixes
150598	51370
160598	51935
170598	51899
180598	51874
190598	51446
200598	51474
210598	51210
220598	51216

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:                 3581

Number of ASes announcing only one prefix:        1707 (896 cidr, 811 classful)

Largest number of  cidr routes:                    364 announced by AS3561
Largest number of classful routes:                1082 announced by  AS701

1) Gains by aggregating at the origin AS level

 --- 22May98 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS816        800      516      284   35.5%   UUNET Canada (ASN-UUNETCA-AS4)
AS4293       464      240      224   48.3%   IMCI
AS2493       527      308      219   41.6%   iSTAR Internet, Inc.
AS174        809      625      184   22.7%   Performance Systems International
AS701       1082      904      178   16.5%   Alternet
AS3602       483      305      178   36.9%   Sprint Canada Inc.
AS2048       161       89       72   44.7%   LaNet
AS3248       130       60       70   53.8%   VIAnet
AS5668       115       46       69   60.0%   Century Telephone Inc.
AS3221       110       41       69   62.7%   EENet Autonomous System
AS7046       193      133       60   31.1%   UUNET-CUSTOMER
AS271        112       53       59   52.7%   BCnet Backbone
AS4755        88       32       56   63.6%   Videsh Sanchar Nigam Ltd. India
AS3804       196      140       56   28.6%   Bell Solutions
AS549        208      155       53   25.5%   ONet Backbone
AS1221       277      226       51   18.4%   AARNET-AS
AS72          85       37       48   56.5%   Schlumberger Information Network
AS4539        73       26       47   64.4%   NETROPOLIS
AS1239       538      491       47    8.7%   SprintLink Backbone
AS6335        66       23       43   65.2%   NTRNET
AS4740       366      323       43   11.7%   ASN-OZEMAIL (Ozemail Pty Ltd)
AS852        157      117       40   25.5%   AGT Advance Communication
AS4200       130       90       40   30.8%   AGIS (Apex Global Information Ser
AS10928       86       46       40   46.5%   UNKNOWN
AS684         94       55       39   41.5%   Manitoba Regional Network Backbon
AS7657       129       91       38   29.5%   The Internet Group Limited
AS3493       165      127       38   23.0%   INTERLINK
AS1591       140      102       38   27.1%   SAIC DISM
AS762        116       79       37   31.9%   WELLFLEET-AS
AS719        440      403       37    8.4%   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