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The Cidr Report (fwd)
Just FYI.
I will ask Tony to add afnog at afnog.org to its recipient list.
---------- Forwarded message ----------
Date: Fri, 20 Apr 2001 23:00:04 -0700
From: Tony Bates <tbates at cisco.com>
To: nanog at merit.edu
Cc: tbates at cisco.com, eof-list at ripe.net, apops at apnic.net, routing-wg at ripe.net
Subject: The Cidr Report
This is an auto-generated mail on Fri Apr 20 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.
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A summary of the last weeks changes in terms of withdrawn and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 20Apr01
0) General Status
Table History
-------------
Date Prefixes
130401 99823
140401 99656
150401 99795
160401 99731
170401 99601
180401 99779
190401 99884
200401 100216
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 223.255.46.0 from AS6853
*** Bogus 223.255.70.0 from AS6853
AS Summary
----------
Number of ASes in routing system: 10519
Number of ASes announcing only one prefix: 6219 (3531 cidr, 2688 classful)
Largest number of cidr routes: 1218 announced by AS705
Largest number of classful routes: 1592 announced by AS1221
1) Gains by aggregating at the origin AS level
--- 20Apr01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1592 1194 398 25.0% Telstra Pty Ltd
AS701 1462 1276 186 12.7% 1
AS705 368 251 117 31.8% 1
AS6429 214 105 109 50.9% 1
AS4151 247 139 108 43.7% 1
AS6595 163 62 101 62.0% 1
AS13999 104 8 96 92.3% 1
AS4293 370 277 93 25.1% 1
AS7018 694 605 89 12.8% 1
AS15412 430 341 89 20.7% FLAG Telecom Global Internet AS
AS8013 319 236 83 26.0% 1
AS4755 218 138 80 36.7% Videsh Sanchar Nigam Ltd. Autonom
AS577 241 172 69 28.6% 1
AS5106 101 37 64 63.4% 1
AS3749 120 59 61 50.8% 1
AS9498 75 15 60 80.0% BHARTI BT INTERNET LTD.
AS3464 151 92 59 39.1% 1
AS11252 92 34 58 63.0% 1
AS724 203 146 57 28.1% 1
AS16758 63 6 57 90.5% 1
AS1 609 552 57 9.4% 1
AS6413 67 11 56 83.6% 1
AS226 149 93 56 37.6% 1
AS7568 84 29 55 65.5% C.S. Communications Co., Ltd.
AS6471 99 46 53 53.5% 1
AS4323 230 178 52 22.6% 1
AS9269 116 67 49 42.2% City Telecom (H.K.) Ltd.
AS852 200 152 48 24.0% 1
AS10692 62 14 48 77.4% 1
AS9683 48 2 46 95.8% Kyonggi Cable TV
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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