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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical The Cidr Report
This is an auto-generated mail on Fri Mar 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.
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A summary of the last weeks changes in terms of withdrawn and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.
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CIDR REPORT for 30Mar01
0) General Status
Table History
-------------
Date Prefixes
230301 98100
240301 99246
250301 99357
260301 101036
270301 99534
280301 98459
290301 98695
300301 98619
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 91.16.23.0/24 from AS11770
AS Summary
----------
Number of ASes in routing system: 10372
Number of ASes announcing only one prefix: 6079 (3458 cidr, 2621 classful)
Largest number of cidr routes: 923 announced by AS701
Largest number of classful routes: 1608 announced by AS1221
1) Gains by aggregating at the origin AS level
--- 30Mar01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1608 1207 401 24.9% Telstra Pty Ltd
AS701 1451 1278 173 11.9% UUNET Technologies, Inc.
AS9269 162 53 109 67.3% City Telecom (H.K.) Ltd.
AS4151 260 157 103 39.6% USDA
AS6595 163 62 101 62.0% DoD Education Activity Network As
AS705 343 245 98 28.6% UUNET Technologies, Inc.
AS4293 371 278 93 25.1% Cable & Wireless USA
AS8013 327 242 85 26.0% PSINet Ltd. Canada
AS7018 672 590 82 12.2% AT&T
AS4755 207 131 76 36.7% Videsh Sanchar Nigam Ltd. Autonom
AS13999 88 17 71 80.7% Mega Cable S.A. de C.V.
AS577 240 171 69 28.7% Bell Advanced Communications Inc.
AS5106 101 37 64 63.4% Ameritech Advanced Data Services,
AS3464 153 91 62 40.5% Alabama SuperComputer Network
AS3749 120 61 59 49.2% Tennessee Board of Regents
AS9498 74 17 57 77.0% BHARTI BT INTERNET LTD.
AS16758 63 6 57 90.5% IKON Office Solutions
AS6413 67 11 56 83.6% Southern Online Systems, Inc.
AS376 134 78 56 41.8% Reseau Interordinateurs Scientiqu
AS226 149 93 56 37.6% Los Nettos
AS11170 60 4 56 93.3% Bewell Net
AS7568 84 29 55 65.5% C.S. Communications Co., Ltd.
AS724 194 139 55 28.4% DLA Systems Automation Center
AS4323 233 178 55 23.6% Time Warner Communications, Inc.
AS1 608 554 54 8.9% BBN Planet
AS6471 98 45 53 54.1% ENTEL CHILE S.A.
AS11252 89 36 53 59.6% ISU Computer Center Bldg. 5
AS7046 303 251 52 17.2% UUNET Technologies, Inc.
AS174 445 393 52 11.7% PSINet Inc.
AS1237 107 58 49 45.8% System Engineering Research Insti
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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