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The Cidr Report
This is an auto-generated mail on Fri Oct 26 23:00:00 PDT 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A summary of the last weeks changes in terms of withdrawn and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 26Oct01
0) General Status
Table History
-------------
Date Prefixes
191001 104997
201001 104988
211001 104985
221001 105173
231001 105209
241001 104135
251001 103926
261001 104244
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: 8804
Number of ASes announcing only one prefix: 3995 (3995 cidr, 0 classful)
Largest number of cidr routes: 846 announced by AS701
Largest number of classful routes: 0 announced by
1) Gains by aggregating at the origin AS level
--- 26Oct01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1223 940 283 23.1% Telstra Pty Ltd
AS4151 298 164 134 45.0% USDA
AS13999 136 9 127 93.4% Mega Cable S.A. de C.V.
AS16473 196 75 121 61.7% Bell South
AS4293 364 257 107 29.4% Cable & Wireless USA
AS2048 215 116 99 46.0% State of Louisiana
AS271 158 71 87 55.1% University of British Columbia
AS4755 215 133 82 38.1% Videsh Sanchar Nigam Ltd. Autonom
AS1239 476 400 76 16.0% Sprint
AS12302 106 35 71 67.0% MobiFon S.A.
AS17557 138 71 67 48.6% Pakistan Telecom
AS4200 131 66 65 49.6% Apex Global Information Services,
AS3464 161 96 65 40.4% Alabama SuperComputer Network
AS19632 72 7 65 90.3% Metropolis Intercom S.A.
AS16758 63 6 57 90.5% IKON Office Solutions
AS209 304 249 55 18.1% Qwest
AS226 144 91 53 36.8% Los Nettos
AS4323 273 221 52 19.0% Time Warner Communications, Inc.
AS3908 298 247 51 17.1% Supernet, Inc.
AS17561 111 60 51 45.9% Internet service provision to Wes
AS376 121 73 48 39.7% Reseau Interordinateurs Scientiqu
AS10620 69 21 48 69.6% TVCABLE BOGOTA
AS1 517 469 48 9.3% BBN Planet
AS16814 65 18 47 72.3% NSS, S.A.
AS15288 71 24 47 66.2% Alcanet International NA
AS15290 247 201 46 18.6% AT&T Canada IES
AS2652 129 85 44 34.1% Government Telecommunications and
AS10292 70 27 43 61.4% TELECOMMUNICATIONS OF JAMAICA
AS5416 51 9 42 82.4% BATELCO-BH
AS5103 76 34 42 55.3% Ameritech Advanced Data Services,
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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