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The Cidr Report
This is an auto-generated mail on Fri Nov 30 23:00:00 PST 2001
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.
Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.
NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for
the regional version of this report.
NEW: Check http://www.employees.org/~tbates/autnums.html for a complete
list of autonomous system number to name mappings as used by the CIDR-Report.
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A summary of the last weeks changes in terms of withdrawn and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 GX Networks for giving me access to their routing tables once a
day.
Please send any comments about this report directly to CIDR Report <cidr-report at cisco.com>.
------------------------------------------------------------------------------
CIDR REPORT for 30Nov01
0) General Status
Table History
-------------
Date Prefixes
231101 104388
241101 104158
251101 103973
261101 104689
271101 104073
281101 104130
291101 103988
301101 104104
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: 12046
Number of ASes announcing only one prefix: 7241 (4108 cidr, 3133 classful)
Largest number of cidr routes: 797 announced by AS701
Largest number of classful routes: 1396 announced by AS701
1) Gains by aggregating at the origin AS level
--- 30Nov01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1197 921 276 23.1% Telstra Pty Ltd
AS4151 319 179 140 43.9% USDA
AS16473 198 77 121 61.1% Bell South
AS4755 226 142 84 37.2% Videsh Sanchar Nigam Ltd. Autonom
AS2048 184 105 79 42.9% State of Louisiana
AS1239 483 405 78 16.1% Sprint
AS19632 87 11 76 87.4% Metropolis Intercom S.A.
AS17557 154 83 71 46.1% Pakistan Telecom
AS12302 104 36 68 65.4% MobiFon S.A.
AS4200 127 62 65 51.2% Apex Global Information Services,
AS2149 351 287 64 18.2% Performance Systems, Inc.
AS3464 156 95 61 39.1% Alabama SuperComputer Network
AS16758 63 6 57 90.5% IKON Office Solutions
AS4323 370 314 56 15.1% Time Warner Communications, Inc.
AS3908 303 251 52 17.2% Supernet, Inc.
AS17561 115 64 51 44.3% Internet service provision to Wes
AS1 513 462 51 9.9% BBN Planet
AS209 292 242 50 17.1% Qwest
AS376 122 73 49 40.2% Reseau Interordinateurs Scientiqu
AS16814 65 18 47 72.3% NSS, S.A.
AS11139 92 46 46 50.0% Cable & Wireless Dominica
AS15290 240 196 44 18.3% AT&T Canada IES
AS10620 64 21 43 67.2% TVCABLE BOGOTA
AS10292 72 29 43 59.7% TELECOMMUNICATIONS OF JAMAICA
AS5416 51 9 42 82.4% BATELCO-BH
AS1267 68 26 42 61.8% Infostrada S.p.A.
AS19834 51 11 40 78.4% NetForce, Inc.
AS2007 167 129 38 22.8% INFONET
AS12235 47 9 38 80.9% Cove Software Systems Inc
AS2652 103 67 36 35.0% Government Telecommunications and
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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