The Cidr Report
Tony Bates
tbates at cisco.com
Fri Nov 26 20:00:04 UTC 1999
This is an auto-generated mail on Fri Nov 26 12:00:02 PST 1999
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A summary of the last weeks changes in terms of withdrawn and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 26Nov99
0) General Status
Table History
-------------
Date Prefixes
071199 66095
081199 66195
091199 66908
101199 65842
111199 67577
241199 67406
251199 67521
261199 67449
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 219.91.160.0/22 from AS7742
*** Bogus 219.91.164.0/23 from AS7742
AS Summary
----------
Number of ASes in routing system: 6114
Number of ASes announcing only one prefix: 3245 (1783 cidr, 1462 classful)
Largest number of cidr routes: 640 announced by AS701
Largest number of classful routes: 979 announced by AS701
1) Gains by aggregating at the origin AS level
--- 26Nov99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 383 141 242 63.2% BCnet Backbone
AS7046 386 257 129 33.4% UUNET-CUSTOMER
AS1221 626 514 112 17.9% TELSTRA-AS
AS2609 125 15 110 88.0% EUnet-TN
AS9706 112 11 101 90.2% Pusan Metropolitan City Office of
AS9269 126 27 99 78.6% Hong Kong CTI
AS7657 264 168 96 36.4% The Internet Group Limited
AS7545 146 60 86 58.9% TPG Internet Pty Ltd
AS174 562 476 86 15.3% Performance Systems International
AS7496 123 38 85 69.1% Power Up
AS4293 226 142 84 37.2% Internal ASN for C&W
AS577 265 185 80 30.2% Bell Canada Backbone
AS3749 134 61 73 54.5% TECNET
AS4200 181 111 70 38.7% AGIS (Apex Global Information Ser
AS3602 309 245 64 20.7% Sprint Canada Inc.
AS705 134 75 59 44.0% ALTERNET-AS
AS4740 351 293 58 16.5% Ozemail Pty Ltd (ASN-OZEMAIL)
AS816 251 194 57 22.7% UUNET Canada (ASN-UUNETCA-AS4)
AS209 330 276 54 16.4% Qwest Communications
AS684 92 46 46 50.0% Manitoba Regional Network Backbon
AS701 979 936 43 4.4% Alternet
AS1 522 480 42 8.0% GTE Internetworking
AS549 213 172 41 19.2% ONet Backbone
AS9304 56 16 40 71.4% Hutchcity
AS6528 45 7 38 84.4% WORLD-LYNX
AS2493 122 84 38 31.1% iSTAR Internet, Inc.
AS4755 108 71 37 34.3% Videsh Sanchar Nigam Ltd. India
AS6629 63 28 35 55.6% NOAA-AS
AS1727 97 63 34 35.1% MRMS-WEST
AS3737 99 66 33 33.3% PenTeleData Inc. (ASN-PTD)
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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