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The Cidr Report
This is an auto-generated mail on Fri Nov 23 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A summary of the last weeks changes in terms of withdrawn and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 23Nov01
0) General Status
Table History
-------------
Date Prefixes
161101 105107
171101 104669
181101 104452
191101 104732
201101 104515
211101 104367
221101 104601
231101 104388
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: 7341
Number of ASes announcing only one prefix: 3130 (0 cidr, 3130 classful)
Largest number of cidr routes: 0 announced by
Largest number of classful routes: 1416 announced by AS701
1) Gains by aggregating at the origin AS level
--- 23Nov01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1202 928 274 22.8% Telstra Pty Ltd
AS701 1416 1175 241 17.0% UUNET Technologies, Inc.
AS4151 316 179 137 43.4% USDA
AS4755 328 197 131 39.9% Videsh Sanchar Nigam Ltd. Autonom
AS16473 203 77 126 62.1% Bell South
AS577 319 196 123 38.6% Bell Advanced Communications Inc.
AS7018 814 695 119 14.6% AT&T
AS6595 162 57 105 64.8% DoD Education Activity Network As
AS705 277 175 102 36.8% UUNET Technologies, Inc.
AS852 390 296 94 24.1% Telus Advanced Communications
AS2048 206 116 90 43.7% State of Louisiana
AS8010 124 36 88 71.0% PublicNet Communications, Inc.
AS4323 396 311 85 21.5% Time Warner Communications, Inc.
AS1239 475 399 76 16.0% Sprint
AS19632 85 10 75 88.2% Metropolis Intercom S.A.
AS1273 327 257 70 21.4% Cable & Wireless ECRC GmbH
AS12302 106 38 68 64.2% MobiFon S.A.
AS2149 369 302 67 18.2% Performance Systems, Inc.
AS6471 133 67 66 49.6% ENTEL CHILE S.A.
AS17557 142 76 66 46.5% Pakistan Telecom
AS4200 126 61 65 51.6% Apex Global Information Services,
AS3464 161 96 65 40.4% Alabama SuperComputer Network
AS724 209 150 59 28.2% DLA Systems Automation Center
AS7046 294 235 59 20.1% UUNET Technologies, Inc.
AS16758 63 6 57 90.5% IKON Office Solutions
AS13999 70 14 56 80.0% Mega Cable S.A. de C.V.
AS703 273 219 54 19.8% UUNET Technologies, Inc.
AS3908 300 248 52 17.3% Supernet, Inc.
AS17561 113 62 51 45.1% Internet service provision to Wes
AS855 143 93 50 35.0% Canadian Research Network
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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