The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jan 29 20:00:04 UTC 1999
This is an auto-generated mail on Fri Jan 29 12:00:00 PST 1999
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A summary of the last weeks changes in terms of withdrawn and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 29Jan99
0) General Status
Table History
-------------
Date Prefixes
220199 55393
230199 55423
240199 55417
250199 55453
260199 55539
270199 55623
280199 55634
290199 55694
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: 4470
Number of ASes announcing only one prefix: 2208 (1180 cidr, 1028 classful)
Largest number of cidr routes: 350 announced by AS3561
Largest number of classful routes: 1028 announced by AS701
1) Gains by aggregating at the origin AS level
--- 29Jan99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 387 140 247 63.8% BCnet Backbone
AS701 1028 870 158 15.4% Alternet
AS2493 323 174 149 46.1% iSTAR Internet, Inc.
AS174 645 533 112 17.4% Performance Systems International
AS11305 116 8 108 93.1% UNKNOWN
AS3749 149 67 82 55.0% TECNET
AS4755 156 75 81 51.9% Videsh Sanchar Nigam Ltd. India
AS1267 111 30 81 73.0% IUNET-AS
AS4293 211 140 71 33.6% IMCI
AS549 218 152 66 30.3% ONet Backbone
AS4200 160 98 62 38.8% AGIS (Apex Global Information Ser
AS7046 269 208 61 22.7% UUNET-CUSTOMER
AS1221 396 336 60 15.2% AARNET-AS
AS4740 378 320 58 15.3% Ozemail Pty Ltd (ASN-OZEMAIL)
AS1239 527 473 54 10.2% SprintLink Backbone
AS72 89 37 52 58.4% Schlumberger Information Network
AS7657 141 90 51 36.2% The Internet Group Limited
AS7545 109 58 51 46.8% TPG Internet Pty Ltd
AS7496 77 28 49 63.6% Power Up
AS577 221 172 49 22.2% Bell Canada Backbone
AS10928 99 50 49 49.5% UNKNOWN
AS719 452 408 44 9.7% LANLINK autonomous system
AS3221 84 42 42 50.0% EENet Autonomous System
AS852 173 135 38 22.0% AGT Advance Communication
AS3561 723 685 38 5.3% MCI
AS803 72 36 36 50.0% SaskNet Backbone
AS6897 64 28 36 56.2% Global-One Spain
AS7122 110 76 34 30.9% MTS ADVANCED Network Policy
AS2764 330 297 33 10.0% connect.com.au pty ltd
AS6332 101 70 31 30.7% TELNOR
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
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