The Cidr Report
Tony Bates
tbates at cisco.com
Fri May 21 19:00:02 UTC 1999
This is an auto-generated mail on Fri May 21 12:00:00 PDT 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A summary of the last weeks changes in terms of withdrawn and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 21May99
0) General Status
Table History
-------------
Date Prefixes
140599 59083
150599 59128
160599 59127
170599 59193
180599 59298
190599 59365
200599 59432
210599 59570
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 221.43.160.0/19 from AS12323
AS Summary
----------
Number of ASes in routing system: 5001
Number of ASes announcing only one prefix: 2569 (1395 cidr, 1174 classful)
Largest number of cidr routes: 400 announced by AS701
Largest number of classful routes: 810 announced by AS701
1) Gains by aggregating at the origin AS level
--- 21May99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 354 144 210 59.3% BCnet Backbone
AS4293 270 165 105 38.9% IMCI
AS174 595 497 98 16.5% Performance Systems International
AS4755 175 86 89 50.9% Videsh Sanchar Nigam Ltd. India
AS2493 209 124 85 40.7% iSTAR Internet, Inc.
AS577 254 175 79 31.1% Bell Canada Backbone
AS3749 141 64 77 54.6% TECNET
AS4200 174 98 76 43.7% AGIS (Apex Global Information Ser
AS1267 94 24 70 74.5% IUNET-AS
AS7496 99 30 69 69.7% Power Up
AS1785 384 321 63 16.4% NYSERNet Backbone
AS7545 111 49 62 55.9% TPG Internet Pty Ltd
AS7122 139 78 61 43.9% MTS ADVANCED Network Policy
AS1221 458 397 61 13.3% TELSTRA-AS
AS9269 68 9 59 86.8% Hong Kong CTI
AS10928 111 54 57 51.4% UNKNOWN
AS7657 170 114 56 32.9% The Internet Group Limited
AS72 94 39 55 58.5% Schlumberger Information Network
AS4740 329 274 55 16.7% Ozemail Pty Ltd (ASN-OZEMAIL)
AS719 475 421 54 11.4% LANLINK autonomous system
AS1239 525 471 54 10.3% SprintLink Backbone
AS7046 251 205 46 18.3% UUNET-CUSTOMER
AS3737 111 73 38 34.2% PenTeleData Inc. (ASN-PTD)
AS803 73 37 36 49.3% SaskNet Backbone
AS1 499 464 35 7.0% BBNPLANET
AS4307 32 1 31 96.9% SVINET-1
AS3549 132 101 31 23.5% Frontier GlobalCenter
AS2907 208 177 31 14.9% SINET
AS11515 32 1 31 96.9% UNKNOWN
AS10479 36 5 31 86.1% ITESM-Rectoria Zona Norte
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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