The Cidr Report
Tony Bates
tbates at cisco.com
Fri Feb 5 20:00:03 UTC 1999
This is an auto-generated mail on Fri Feb 5 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A summary of the last weeks changes in terms of withdrawn and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 05Feb99
0) General Status
Table History
-------------
Date Prefixes
290199 55694
300199 55734
310199 55712
010299 55847
020299 55793
030299 55899
040299 55881
050299 55641
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: 4500
Number of ASes announcing only one prefix: 2232 (1187 cidr, 1045 classful)
Largest number of cidr routes: 353 announced by AS701
Largest number of classful routes: 881 announced by AS701
1) Gains by aggregating at the origin AS level
--- 05Feb99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 386 140 246 63.7% BCnet Backbone
AS2493 315 169 146 46.3% iSTAR Internet, Inc.
AS174 656 541 115 17.5% Performance Systems International
AS11305 115 13 102 88.7% UNKNOWN
AS3749 158 66 92 58.2% TECNET
AS1267 111 30 81 73.0% IUNET-AS
AS4755 152 72 80 52.6% Videsh Sanchar Nigam Ltd. India
AS4293 211 140 71 33.6% IMCI
AS7046 273 207 66 24.2% UUNET-CUSTOMER
AS4200 161 99 62 38.5% AGIS (Apex Global Information Ser
AS4740 389 328 61 15.7% Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221 405 345 60 14.8% AARNET-AS
AS701 881 825 56 6.4% Alternet
AS1239 529 474 55 10.4% SprintLink Backbone
AS7657 142 90 52 36.6% The Internet Group Limited
AS72 89 37 52 58.4% Schlumberger Information Network
AS7545 109 58 51 46.8% TPG Internet Pty Ltd
AS10928 100 50 50 50.0% UNKNOWN
AS7496 77 28 49 63.6% Power Up
AS577 221 172 49 22.2% Bell Canada Backbone
AS719 452 407 45 10.0% LANLINK autonomous system
AS3221 84 42 42 50.0% EENet Autonomous System
AS852 173 135 38 22.0% AGT Advance Communication
AS803 72 36 36 50.0% SaskNet Backbone
AS6897 64 28 36 56.2% Global-One Spain
AS7745 39 4 35 89.7% BIGSKY-AS
AS7122 112 77 35 31.2% MTS ADVANCED Network Policy
AS6332 98 64 34 34.7% TELNOR
AS2764 334 301 33 9.9% connect.com.au pty ltd
AS4307 32 1 31 96.9% SVINET-1
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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